WO2010051767A1 - 主从式直流载波通信*** - Google Patents
主从式直流载波通信*** Download PDFInfo
- Publication number
- WO2010051767A1 WO2010051767A1 PCT/CN2009/074837 CN2009074837W WO2010051767A1 WO 2010051767 A1 WO2010051767 A1 WO 2010051767A1 CN 2009074837 W CN2009074837 W CN 2009074837W WO 2010051767 A1 WO2010051767 A1 WO 2010051767A1
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- WIPO (PCT)
- Prior art keywords
- module
- host
- slave
- communication interface
- unipolar
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
Definitions
- the present invention relates to the field of communications, and more particularly to improvements in host and slave designs in a master-slave DC carrier communication system.
- PROFIBUS In the field of industrial control - distributed control system, PROFIBUS, LONWOK are often used.
- Industrial field control bus such as S, CAN, FF.
- S Industrial field control bus
- CAN CAN
- FF Industrial field control bus
- the power line carrier communication system is often used at present, that is, the host loads the data information to be transmitted on the fundamental frequency power line in a high-frequency wave manner, thereby realizing the supply of power to the slaves of each node.
- the peer completes the transmission of the data.
- the characteristic of this kind of system is that the slaves of each node need to have dedicated and relatively complicated data modulation and data demodulation modules, and in order to receive power and data simultaneously, the slaves use transformer isolation to extract the power required for their work. Then, through the rectification, filtering, etc., the externally supplied AC signal is converted into a DC signal required for the slave to operate.
- the data receiving circuit is formed by the method of resistor divider or voltage regulator rectification, resulting in a large power consumption of the slave.
- Patented ZL200420084237.4 provides a slave communication interface that uses dedicated modules to receive and transmit data, but can be less integrated and cannot meet the application requirements of small slaves.
- the object of the present invention is to solve the above drawbacks of the prior art, and provide a master-slave DC carrier communication system capable of performing simplex bidirectional data transmission on a dual-line non-polarity-differentiated peer capable of providing DC working power to a slave.
- the master and slave in the machine greatly simplifies the design and connection of the master and slave, making it suitable for small slave systems such as electronic detonator networks, smart sensor networks and the like.
- the master-slave DC carrier communication system of the present invention comprises a host, one or more slaves, and a signal bus connecting the master and the slave, and the slaves are connected in parallel between the signal buses led by the host.
- the technical purpose of the present invention is achieved by the use of a host and a slave.
- a host may include a host clock circuit, a host power system, a host communication interface, and a host control module.
- the specific connection relationship has the following two technical solutions:
- the host clock circuit, the host power system, the host communication interface, and the host control module each have one end grounded.
- the working voltage output end of the host power system is connected to the host communication interface, the host clock circuit, and the host control module; the remaining end of the host power system is a communication voltage output end, and a communication voltage input end to the host communication interface; the host communication interface is also The two ends are respectively connected to the outside of the host to form a signal bus; the other end of the host communication interface is connected to the host control module; the other end of the host clock circuit is connected to the host control module.
- the host power supply system supplies working power to each module in the host through its working voltage output terminal, and supplies power to the slave through the communication voltage output terminal, which makes the power supply to the slave machine and itself
- the working power required for the work works independently, thereby avoiding the influence that the noise generated by the host work may have on the communication between the master and the slave.
- the host provides DC power to the slave, thus avoiding the complicated AC/DC conversion required for AC power supply. Therefore, only the slave A simple linear power system is required to improve the reliability and integration of the slave.
- FIG. 18 Another technical solution of the host in the present invention is further improved on the basis of the host technical solution shown in FIG. 2, as shown in FIG. 18, which is specifically embodied as: outputting the communication voltage of the host power system
- the terminal is refined into a transmitting voltage output terminal and a receiving voltage output terminal;
- the communication voltage input terminal of the host communication interface is refined into a transmitting voltage input terminal and a receiving voltage input terminal.
- the transmit voltage output end of the host power system is connected to the transmit voltage input end of the host communication interface;
- the receive voltage output end of the host power system is connected to the receive voltage input end of the host communication interface.
- the technical scheme of refining the communication voltage into a transmission voltage and a reception voltage can improve the signal-to-noise ratio of the host receiving data and the communication accuracy of the system.
- the host communication interface can be taken as a host communication interface circuit.
- the port of the host communication interface circuit is connected to the communication voltage output end of the host power system to form a communication voltage input terminal of the host communication interface, as shown in FIG.
- the host communication interface can be composed of a host communication interface circuit and an electronic switch, as shown in Fig. 19.
- the two input ends of the electronic switch one lead to the outside of the host communication interface, respectively forming a transmitting voltage input end and a receiving voltage input end; the output end of the electronic switch one is connected to the port one of the host communication interface circuit; the control of the electronic switch one The end is connected to the host control module.
- the host communication interface circuit has one end connected to the working voltage output end of the host power system; one end is grounded one; and the two ends are respectively connected to the outside of the host communication interface to form a signal bus; the other end of the host communication interface circuit is connected to the host control module .
- the electronic switch 1 described above performs switching of the transmission voltage and the reception voltage under the control of the host control module.
- the host control module sends a control signal expressing the transmit voltage output to the control end of the electronic switch 1, so that the branch of the electronic switch connected to the transmit voltage output is turned on, that is, the host communication interface circuit
- the branch is turned on, and the signal bus appears as the transmit voltage. vice versa.
- the host communication interface circuit in Fig. 3 and Fig. 19 above may be adopted as a unipolar communication interface circuit or a bipolar communication interface circuit.
- the unipolar communication interface circuit includes a unipolar data modulation module and a unipolar data demodulation module, and the specific connection relationship has the following three technical solutions:
- the unipolar data modulation module and the unipolar data demodulation module are connected to the working voltage output terminal of the host power system; the unipolar data modulation module is also associated with the unipolar data solution.
- Tuning module Grounding one that is, connected to the ground line; the unipolar data modulation module and the unipolar data demodulation module each have one end connected to the host control module respectively.
- the modulating signal input end of the unipolar data modulation module leads to the outside of the unipolar communication interface circuit to form port one; the modulating signal output end of the unipolar data modulation module leads to the unipolar communication via the unipolar data demodulation module Outside the interface circuit, one of the signal buses is formed; the ground line leads to the outside of the unipolar communication interface circuit, forming another of the signal buses.
- the unipolar data modulation module and the unipolar data demodulation module are connected to the working voltage output terminal of the host power system; the unipolar data modulation module is also associated with the unipolar data solution.
- the modulation module is grounded one by one, that is, connected to the ground line; the unipolar data modulation module and the unipolar data demodulation module each have one end connected to the host control module respectively.
- the modulating signal input end of the unipolar data modulation module leads to the outside of the unipolar communication interface circuit via the unipolar data demodulation module to form port one; the modulated signal output end of the ground line and the unipolar data modulation module respectively leads to Outside the unipolar communication interface circuit, it constitutes a signal bus.
- the unipolar data modulation module and the unipolar data demodulation module are connected to the working voltage output terminal of the host power system; the unipolar data modulation module is also associated with the unipolar data solution.
- the modulation module is grounded one by one, that is, connected to the ground line; the unipolar data modulation module and the unipolar data demodulation module each have one end connected to the host control module respectively.
- the modulating signal input end of the unipolar data modulation module leads to the outside of the unipolar communication interface circuit to form port one; the modulating signal output end of the unipolar data modulation module leads to the outside of the unipolar communication interface circuit to form a signal bus.
- One; the other end of the unipolar data demodulation module leads to the outside of the unipolar communication interface circuit, forming another of the signal buses.
- the unipolar communication interface circuit shown in Figure 4, Figure 5 and Figure 6 above achieves the simplex and two-way data exchange between the master and the slave on the DC power supply line with a relatively simple scheme.
- the unipolar data modulation module, the unipolar data demodulation module, and the output load of the host composed of the parallel network of slaves the three are equivalent to the communication voltage output terminal connected in series to the host power system. Between the ground and the ground, the different connection sequences of the three constitute the above three different schemes.
- the unipolar data modulation module is used to load the data sent by the host in the form of voltage change on the signal bus output to the slave, and the unipolar data demodulation module is used to extract the slave to load the signal bus in the form of current change. Data information
- the unipolar data The modulation module may include a driving module 1 and an electronic switch 2.
- the specific connection relationship is as follows: One end of the driving module is connected to the working voltage output end of the host power system, and one end is grounded together with one input end of the electronic switch 2; The signal input end of the driving module 1 is connected to the host control module; the signal output end of the driving module 1 is connected to the control end of the electronic switch 2; the other end of the driving module 1 and the other input end of the electronic switch 2 are connected to the unipolar Outside the data modulation module, the modulation signal input terminal of the unipolar data modulation module is formed; the output end of the electronic switch 2 leads to the outside of the unipolar data modulation module, and constitutes a modulation signal output end of the unipolar data modulation module.
- the above-mentioned unipolar data modulation module has the advantages that: the host expresses the data sent by the host to the slave in the manner of the power supply to the slave, and realizes the data transmitted by the host to the slave. Power supply and data transmission are synchronized.
- the host communication interface circuit in the above FIG. 3 and FIG. 19 can also be taken as a bipolar communication interface circuit, which includes a bipolar data modulation module and a bipolar data demodulation module.
- the specific connection relationship has the following three technical solutions:
- the bipolar data modulation module is connected to the bipolar data demodulation module to the working voltage output of the host power system; the bipolar data modulation module is also associated with the bipolar data solution.
- the modulation module is grounded one by one, that is, connected to the ground line; the bipolar data modulation module and the bipolar data demodulation module each have one end connected to the host control module respectively.
- the modulation signal input end of the bipolar data modulation module leads to the outside of the bipolar communication interface circuit to form port one; the two modulated signal output ends of the bipolar data modulation module, one via the bipolar data demodulation module Outside the bipolar communication interface circuit, one of the signal buses is formed, and the other directly leads to the outside of the bipolar communication interface circuit, forming another of the signal buses.
- the bipolar data modulation module and the bipolar data demodulation module are connected together to the working voltage output of the host power system; the bipolar data modulation module is also associated with the bipolar data solution.
- the modulation module is grounded one by one, that is, connected to the ground line; the bipolar data modulation module and the bipolar data demodulation module each have one end connected to the host control module respectively.
- the modulation signal input end of the bipolar data modulation module leads to the outside of the bipolar communication interface circuit via the bipolar data demodulation module to form port one; the two modulated signal output ends of the bipolar data modulation module respectively lead to Outside the bipolar communication interface circuit, it constitutes a signal bus.
- the bipolar data modulation module and the bipolar data demodulation module are connected together to the working voltage output of the host power system; the bipolar data modulation module is also associated with the bipolar data solution.
- the modulation module is grounded one by one, that is, connected to the ground line; the bipolar data modulation module and the bipolar data demodulation module each have one end connected to the host control module respectively.
- the modulation signal input end of the bipolar data modulation module leads to the outside of the bipolar communication interface circuit to form port one; the two modulated signal output ends of the bipolar data modulation module respectively lead to the outside of the bipolar communication interface circuit,
- the signal bus is formed; the other end of the bipolar data modulation module is connected to the bipolar data demodulation module.
- the bipolar communication interface circuit shown in FIG. 8, FIG. 9, and FIG. 11 is further optimized for the unipolar communication interface circuit scheme shown in FIG. 4, FIG. 5, and FIG.
- the polarity data modulation module realizes the output of the power supply to the slave by the host to output the power supply to the slave to provide the data sent by the host to the slave in a manner that provides positive and negative communication voltages with respect to the ground.
- the advantages are: switching between different transmission data, for example, switching from transmission data 0 to transmission data 1, because the polarity of the output voltage of the host is opposite, therefore, the energy remaining in the equivalent inductance or equivalent capacitance on the signal bus The venting path in the opposite direction is established, so that the data transmission rate of the bipolar communication interface circuit is faster, the signal amplitude changes more, and the anti-interference performance is higher.
- the bipolar data modulation module includes two driving modules, two electronic switches, and an inverter one, respectively, a driving module III.
- Module 4 Electronic Switch 6, and Electronic Switch 7, see Figure 10.
- the specific connection relationship is as follows: Two drive modules and an inverter are connected in common to the working voltage output end of the host power system, and the two drive modules and the inverter are also commonly grounded one; the signal input end and the drive of the inverter one are The signal input end of the module 4 is connected to the host control module, and the signal output end of the inverter one is connected to the signal input end of the drive module 3; the signal output end of the drive module 3 is connected to the control end of the electronic switch 6, the drive module 4 The signal output is connected to the control terminal of the electronic switch 7.
- the bipolar data modulation module includes two driving modules, two electronic switches, and an inverter two, respectively, a driving module 5 and a driving module.
- the specific connection relationship is as follows: The two driving modules and the inverter 2 are connected in common to the working voltage output end of the host power system, and the two driving modules and the inverter 2 are also commonly grounded one; the signal input end and the driving of the inverter two
- the signal input end of the module 6 is commonly connected to the host control module, and the signal output end of the inverter 2 is connected to the signal input end of the drive module 5; the signal output end of the drive module 5 is connected to the control end of the electronic switch 8, the drive module 6
- the signal output is connected to the control terminal of the electronic switch 9.
- An input of the electronic switch 8, an input of the electronic switch 9, the remaining end of the drive module 5, and the remaining end of the drive module 6 are connected to the outside of the bipolar data modulation module to form a bipolar data modulation
- the modulation signal input end of the module; the other input end of the electronic switch 8 is connected to the other input end of the electronic switch 9, and is grounded via the bipolar data demodulation module external to the bipolar data modulation module; two electronic switches
- the outputs are respectively connected to the outside of the bipolar data modulation module to form two modulated signal outputs of the bipolar data modulation module.
- the host communication interface shown in Fig. 18 is taken as a unipolar communication interface, including a unipolar data modulation module, a unipolar data demodulation module, and an electronic switch 3, as shown in Fig. 20.
- the specific connection relationship is as follows: The unipolar data modulation module and the unipolar data demodulation module are connected to the working voltage output end of the host power system; the unipolar data modulation module is also grounded together with the unipolar data demodulation module. That is, connected to the ground line; the unipolar data modulation module and the unipolar data demodulation module each have one end connected to the host control module respectively.
- the modulation signal input end of the unipolar data modulation module leads to the outside of the unipolar communication interface, and is connected to the transmission voltage output end of the host power system to form a transmission voltage input terminal of the unipolar communication interface; the unipolar data modulation module
- the modulated signal output is connected to one input of the electronic switch three; the other end of the unipolar data modulation module leads to the outside of the unipolar communication interface to form one of the signal buses.
- the unipolar data demodulation module has one end connected to the receiving voltage output end of the host power system, forming a receiving voltage input end of the unipolar communication interface; the other end of the unipolar data demodulating module is connected to the electronic switch three An input.
- the control end of the electronic switch 3 is connected to the host control module; the output end of the electronic switch 3 leads to the outside of the unipolar communication interface to form another one of the signal buses.
- the technical solution shown in FIG. 20 described above uses a relatively simple unipolar communication interface to implement data interaction between a simplex and a bidirectional host and a slave on a DC power supply line.
- the unipolar data modulation module is directly connected to the transmission voltage output end of the host power system
- the unipolar data demodulation module is directly connected to the receiving voltage output end of the host power system
- the electronic switch three is under the control of the host control module. , completes the switching of the voltage output to the signal bus.
- the host control module When the host sends data to the slave, the host control module sends a control signal indicating the output of the transmission voltage to the control terminal of the electronic switch 3, so that the branch of the electronic switch three connected to the unipolar data modulation module is turned on, and the signal bus is connected. It behaves as a transmission voltage. vice versa.
- the technical solution also realizes the separation of the transmission voltage and the reception voltage, and lays a technical foundation for improving the communication accuracy.
- the unipolar data modulation module includes a drive module 2 and an electronic switch 4, as shown in FIG.
- the specific connection relationship is as follows: The second end of the driving module is connected to the working voltage output end of the host power system; the signal input end of the driving module 2 is connected to the host control module; the signal output end of the driving module 2 is connected to the control end of the electronic switch 4; The driving module 2 has one end and an input end of the electronic switch 4 to the outside of the unipolar data modulation module, and constitutes a modulation signal input end of the unipolar data modulation module.
- the other end of the driving module 2 is grounded together with the other input terminal of the electronic switch 4, and leads to the outside of the unipolar data modulation module to constitute one of the signal buses.
- the output of the electronic switch 4 leads to the outside of the unipolar data modulation module and forms the modulated signal output of the unipolar data modulation module.
- the host communication interface shown in Fig. 18 can also be taken as a bipolar communication interface, as shown in Fig. 22, including a bipolar data modulation module, a bipolar data demodulation module, and an electronic switch 5.
- the specific connection relationship is as follows: The bipolar data modulation module and the bipolar data demodulation module are connected to the working voltage output end of the host power system; the bipolar data modulation module is also grounded together with the bipolar data demodulation module. That is, connected to the ground line; the bipolar data modulation module and the bipolar data demodulation module each have one end connected to the host control module respectively.
- the modulation signal input end of the bipolar data modulation module leads to the outside of the bipolar communication interface, and is connected to the transmission voltage output end of the host power system to form a transmission voltage input end of the bipolar communication interface; the bipolar data modulation module Two modulated signal outputs, one connected to one input of the electronic switch five and the other to the outside of the bipolar communication interface, forming one of the signal buses.
- the bipolar data demodulation module also has a receiving voltage output connected to the host power system at one end to form a bipolar The receiving voltage input terminal of the communication interface; the other end of the bipolar data demodulating module is connected to the other input terminal of the electronic switch 5.
- the control end of the electronic switch 5 is connected to the host control module; the output end of the electronic switch 5 leads to the outside of the bipolar communication interface to form another one of the signal buses.
- the technical solution of the bipolar communication interface shown in FIG. 22 above realizes that the host outputs the power supply to the slave to provide a positive and negative communication voltage with respect to the ground, and the host sends the slave to the slave.
- the data wherein, the bipolar data modulation module is directly connected to the transmission voltage output end of the host power system, the bipolar data demodulation module is directly connected to the receiving voltage output end of the host power system, and the electronic switch 5 is under the control of the host control module. , completes the switching of the voltage output to the signal bus.
- the host control module When the host sends data to the slave, the host control module sends a control signal indicating the output of the transmission voltage to the control terminal of the electronic switch 5, so that the branch of the electronic switch five connected to the bipolar data modulation module is turned on, and the signal bus is connected. It behaves as a transmission voltage. vice versa.
- the technical solution also realizes the separation of the transmission voltage and the reception voltage, and lays a technical foundation for improving the communication accuracy.
- the communication voltage output end of the host power supply system of the present invention can be further refined into a transmit voltage output end and a receive voltage output end, and preferably the output voltage of the transmit voltage output end is higher than the output of the receive voltage output end. Voltage.
- the advantages are: When the host is in the non-communication state and the data transmission state, the host outputs a higher transmission voltage to the signal bus to provide charging energy for the energy storage module inside the slave. When the host wants to receive the data sent by the slave, if the host still outputs a higher transmit voltage to the signal bus, the internal energy storage module will continue to obtain the charging energy from the signal bus, which will be on the bus. Current noise is formed, thereby reducing the signal-to-noise ratio of the host receiving data.
- the host receives the data sent by the slave, reducing the voltage output by the host to the signal bus, so that the voltage on the bus is lower than the voltage of the internal energy storage module of the slave, all the slaves in the network will be their own.
- the energy storage module is powered to maintain its own work. This avoids the current noise generated by the slaves receiving the charging energy from the bus after receiving the data from the host, thereby improving the signal-to-noise ratio of the data transmitted by the slave and improving the reliability of the data received by the master.
- the master-slave DC carrier communication system of the present invention further includes one or more slaves.
- the slave includes a slave communication interface, a rectifier bridge circuit, an energy storage module, a slave power system, a slave clock circuit, and a slave control module, as shown in FIG.
- the slave communication interface, the rectifier bridge circuit, the energy storage module, the slave power system, the slave clock circuit, and the slave control module each have one end grounded.
- the power input terminal of the slave power system is connected to the energy storage module, and the power output terminal of the slave power system is respectively connected to the slave control module, the slave clock circuit, and the slave communication interface; the slave communication interface and the rectifier bridge
- Each of the circuits has two ends connected to the slave, respectively connected to the signal bus; the other end of the slave communication interface is connected to the slave control module; the other end of the rectifier bridge circuit is connected to the energy storage module; the slave clock circuit The other end is connected to the slave control module.
- the introduction of the rectifier bridge circuit realizes the polarity conversion of the slave to the input power, thereby eliminating the requirement of the polarity connection of the traditional network communication system, and realizing the two-wire type between the master and the slave.
- the non-polar connection method simplifies the connection process of the master-slave network system and avoids the possibility of damage to the slave due to network connection errors.
- the slave communication interface and the rectifier bridge circuit are connected in parallel between the two signal buses, thereby avoiding the influence of the rectifier bridge circuit on the data transmission speed between the master and the slave, and on the other hand
- the machine can receive both unipolar modulated data and bipolar modulated data.
- the energy storage module in the slave is used to store the energy provided by the host, which makes the slave in the passive working mode, and the energy supply to the entire communication system can be replenished to the host, thereby reducing the system.
- the power supply complexity increases the maintainability of the system.
- the introduction of the energy storage module also enables the slave to exchange data with the host, which maximizes the stability of the slave power system and improves the stability of the entire communication system.
- the slave communication interface includes a slave data modulation module and a slave data demodulation module, and the slave data demodulation module is composed of two slave data demodulation circuits. Composition, as shown in Figure 14. Two slave data demodulation circuits are respectively connected to two signal buses, and two slave data demodulation circuits are also respectively connected to the slave control module, and the two slave data demodulation circuits are commonly connected to the power supply of the slave power system. At the output, the two slave data demodulation circuits are also commonly grounded. One end of the slave data modulation module is connected to the slave control module, one end is grounded two, and the other two ends are respectively connected to two of the signal bus.
- the slave data modulation module of the present invention may comprise three resistors, two NMOS transistors, namely a resistor one, a resistor two, a resistor three, an NMOS transistor one, and an NMOS transistor two, as shown in FIG.
- the drain of the NMOS transistor and the substrate, the drain and the substrate of the NMOS transistor 2, and the end of the resistor one are commonly grounded; the gate of the NMOS transistor, the gate of the NMOS transistor 2, and the other end of the resistor one are connected.
- the slave control module in common; the source of the NMOS transistor 1 is connected to one of the signal buses via the resistor 2, and the source of the NMOS transistor 2 is connected to the other of the signal bus via the resistor 3.
- the slave data modulation module realizes loading the data to be sent onto the signal bus in the form of a change in current consumption.
- the advantages are: since the source and the drain of the NMOS transistor 1 and the NMOS transistor 2 are respectively connected to the ground line and The signal bus, therefore, reduces the effect of individual differences in voltage drop due to the rectifying bridge circuit on the consistency of current consumption variations, so that the change in current consumption sent back by the slave to the host depends only on the voltage on the bus.
- the slave data demodulation circuit in the present invention may include an inverter three and a resistor four as shown in FIG.
- One end of the inverter three is connected to the power output end of the slave power system; the signal input end of the inverter three is connected to one of the signal buses, the terminal is also grounded via the resistor four; the signal output end of the inverter three Connect to the slave control module; the other end of inverter three is directly grounded.
- the above-described slave data demodulation circuit is extremely simple in structure and easy to integrate.
- resistor four By using the pull-down action of the resistor four, it is ensured that the output of the slave data demodulation circuit is in a certain state when the signal bus is in any state of a forward communication voltage, a negative communication voltage or a zero voltage, thereby improving the communication system.
- the reliability because the pull-down effect of the resistor four reduces the input of the inverter 3 in an indeterminate state, the energy stored in the energy storage module of the slave, and improves the effective utilization of the energy storage of the slave.
- resistor 4 when the data on the bus changes, resistor 4 also provides a bleed path for the residual charge on the bus, which in turn increases the communication rate.
- the slave data demodulation circuit in the present invention may also include an inverter four and an NMOS transistor three, as shown in FIG.
- One end of the inverter 4 is connected to the power output end of the slave power supply system, one end is grounded two; the source of the NMOS transistor and the substrate ground are two; the drain thereof is connected with the signal input end of the inverter four, and is connected to the signal together One of the buses; the gate of the NMOS transistor three is connected to the signal output terminal of the inverter four, and is commonly connected to the slave control module.
- the above slave data demodulation circuit uses a negative feedback connected NMOS transistor three to replace the pull-down resistor four, The advantage is that the energy consumption provided by the four pairs of the resistors is avoided, and the utilization efficiency of the host energy is improved.
- the NMOS transistor 3 can accelerate the discharge of the residual charge on the bus, thereby increasing the communication rate of the communication system.
- the inverter III and the inverter 4 are preferably taken as Schmitt inverters.
- the advantage is that regardless of whether the state of the signal input to the inverter is slow, that is, whether the level transition transition period is long, the output edge of the inverter is steep, and the level transition of the output is extremely short. This shortens the state transition of the subsequent processing circuit of the slave data demodulation circuit and reduces the power consumption of the slave.
- Schmitt inverters have good noise immunity and can improve the stability of data received from the slave.
- FIG. 1 is a schematic diagram of network connection of a master-slave DC carrier communication system according to the present invention
- FIG. 2 is a block diagram showing the structure of a host that transmits and receives data with the same voltage in the present invention
- FIG. 3 is a block diagram showing an implementation of a host communication interface formed by a host communication interface circuit in the present invention
- FIG. 4 is a schematic structural view of a first embodiment of a unipolar communication interface circuit according to the present invention.
- FIG. 5 is a schematic structural diagram of a second embodiment of a unipolar communication interface circuit according to the present invention.
- FIG. 6 is a schematic structural diagram of a third embodiment of a unipolar communication interface circuit according to the present invention.
- FIG. 7 is a schematic structural diagram of a first embodiment of a unipolar data modulation module according to the present invention.
- FIG. 8 is a schematic structural diagram of a first embodiment of a bipolar communication interface circuit according to the present invention.
- FIG. 9 is a schematic structural diagram of a second embodiment of a bipolar communication interface circuit according to the present invention.
- FIG. 10 is a schematic structural diagram of a first embodiment of a bipolar data modulation module according to the present invention.
- FIG. 11 is a schematic structural diagram of a third embodiment of a bipolar communication interface circuit according to the present invention.
- FIG. 12 is a schematic structural diagram of a second embodiment of a bipolar data modulation module according to the present invention.
- FIG. 13 is a block diagram showing the configuration of a slave in the present invention.
- Figure 14 is a block diagram showing the structure of a slave communication interface in the present invention.
- Figure 15 is a block diagram showing the structure of a slave data modulation module in the present invention.
- 16 is a schematic structural diagram of a first embodiment of a slave data demodulation circuit according to the present invention
- 17 is a schematic structural diagram of a second embodiment of a slave data demodulation circuit according to the present invention.
- FIG. 18 is a block diagram showing the configuration of a host for transmitting and receiving data by using different voltages in the present invention.
- 19 is a block diagram of an implementation of a host communication interface composed of an electronic switch and a host communication interface circuit in the present invention.
- FIG. 20 is a block diagram showing a configuration of a host communication interface embodied as a unipolar communication interface according to the present invention.
- 21 is a schematic structural diagram of a second embodiment of a unipolar data modulation module according to the present invention.
- FIG. 22 is a block diagram showing a configuration of a host communication interface as a bipolar communication interface according to the present invention.
- FIG. 23-1 is a schematic diagram of a waveform of a unipolar data modulation module transmitting unipolar data to a slave in a host that transmits and receives data with the same voltage in the present invention
- FIG. 23-2 is a schematic diagram of a waveform of receiving unipolar data demodulated by a slave in the present invention
- FIG. 23-3 is a schematic diagram of another path of receiving unipolar data demodulated by a slave in the present invention.
- Figure 24-1 is a schematic diagram of a waveform of a bipolar data modulation module transmitting bipolar data to a slave in a host that transmits and receives data with the same voltage in the present invention
- FIG. 24-2 is a schematic diagram of a waveform of receiving bidirectional data demodulated by a slave in the present invention
- FIG. 24-3 is a schematic diagram of another way of receiving the demodulated bipolar data from the slave in the present invention.
- FIG. 25-1 is a schematic diagram showing voltage waveforms of a slave device for transmitting data in the present invention.
- FIG. 25-2 is a schematic diagram of a current waveform of a slave device transmitting data according to the present invention.
- FIG. 26 is a schematic diagram showing waveforms of a unipolar data modulation module transmitting a unipolar global command to a slave in a host that transmits and receives data with different voltages according to the present invention
- FIG. 27 is a waveform diagram of a bipolar data modulation module transmitting a bipolar single instruction to a slave in a host that transmits and receives data with different voltages in the present invention.
- the master-slave DC carrier communication system of the present invention is composed of a host 100, one or more slaves 200, and a signal bus 300 connecting the host 100 and the slave 200, one or more slaves. 200 are independently connected in parallel between the signal buses 300 led by the host 100, as shown in FIG.
- the host 100 and the slave 200 are used together to realize simplex bidirectional data transmission between the host and the slave to provide DC working power, and the two-wire non-polar connection between the master and the slave, simplifying the host 100 and the slave.
- Machine 200 design and Connected.
- the host 100 may include a host clock circuit 140, a host power system 130, a host communication interface 150, and a host control module 120, as shown in FIG.
- the specific connection relationship is described as follows:
- the operating voltage output 31 of the host power system 130 is connected to the host clock circuit 140, the host control module 120, and the host communication interface 150 to provide the energy required for their operation.
- the communication voltage output 32 of the host power system 130 is coupled to the communication voltage input 51 of the host communication interface 150, and the energy required to operate the slave 200 is output to the signal bus 300 via the host communication interface 150.
- the remaining end of the host power system 130 is grounded 40.
- the host clock circuit 140 is connected to the host control module 120 to provide a clock signal required for the operation of the host control module 120; one end is connected to the working voltage output terminal 31 of the host power system 130, and is received by the host power system 130. Working power; the other end is grounded 40.
- the host communication interface 150 is connected to the host control module 120, and is configured to receive a control signal of the host control module 120 on the one hand, thereby transmitting the working power of the slave 200 to the slave 200 through the signal bus 300.
- the data is sent to the slave, and on the other hand, the data information sent back from the slave 200 extracted from the signal bus 300 is sent to the host control module 120 for processing.
- the other end of the host communication interface 150 is coupled to the operating voltage output 31 of the host power system 130 for accepting the operating voltage provided by the host power system 130.
- the communication voltage input 51 of the host communication interface 150 is coupled to the communication voltage output 32 of the host power system 130 and receives the communication voltage provided by the host power system 130.
- the host communication interface 150 also has one end grounded 40, and the other two ends lead to the outside of the host 100 to form a signal bus 300 for connecting one or more slaves 200.
- the host 100 provides power to the slave 200 via its signal bus 300 for its operation and data exchange with the slave 200.
- the host power system 130 provides working power to each module in the host through its working voltage output terminal 31, and supplies power to the slave 200 through the communication voltage output terminal 32, which enables the power supply to the slave 200. It works independently with the working power required by the host 100 itself, thereby avoiding the influence that the noise generated by the host work may have on the communication between the master and the slave.
- the host 100 provides DC power to the slave 200, thereby avoiding the need for the AC power supply.
- the complicated AC/DC conversion link it is only necessary to design a simple linear power supply system in the slave 200, which improves the reliability and integration of the slave 200.
- the host communication interface 150 is a host communication interface circuit 153, as shown in FIG.
- the port 20 of the host communication interface circuit 153 is connected to the communication voltage output terminal 32 of the host power system 130, constitutes the communication voltage input terminal 51 of the host communication interface 150, and receives the communication voltage supplied from the host power supply system 130.
- a technical solution of the host communication interface circuit 153 shown in FIG. 3 is that the host communication interface circuit can be adopted as a unipolar communication interface circuit, including a unipolar data modulation module 1011 and a unipolar data demodulation module 102.
- the specific connection relationship has the following three implementation methods:
- the unipolar data modulation module 1011 is coupled to the unipolar data demodulation module 102 to the operating voltage output terminal 31 of the host power system 130, and is powered by the host power system 130.
- the unipolar data modulation module 1011 is also commonly coupled 40 to the unipolar data demodulation module 102, i.e., to ground.
- the unipolar data modulation module 1011 and the unipolar data demodulation module 102 also have one end each connected to the host control module 120 for data interaction with the host control module 120.
- the modulation signal input terminal 12 of the unipolar data modulation module 1011 leads to the outside of the unipolar communication interface circuit 1531, and constitutes the port 20 of the unipolar communication interface circuit 153 1 .
- the modulated signal output terminal 11 of the unipolar data modulation module 1011 leads to the outside of the unipolar communication interface circuit 1531 via the unipolar data demodulation module 102, and constitutes one of the signal buses 300, and the ground line leads to the unipolar communication interface. Outside the circuit 1531, another one of the signal buses 300 is formed.
- the unipolar data modulation module 1011 is coupled to the unipolar data demodulation module 102 to the operating voltage output terminal 31 of the host power system 130, and is powered by the host power system 130.
- the unipolar data modulation module 1011 is also commonly coupled 40 to the unipolar data demodulation module 102, i.e., to ground.
- the unipolar data modulation module 1011 and the unipolar data demodulation module 102 also have one end each connected to the host control module 120 for data interaction with the host control module 120.
- the modulation signal input terminal 12 of the unipolar data modulation module 1011 leads to the outside of the unipolar communication interface circuit 1532 via the unipolar data demodulation module 102, and constitutes the port 20 of the unipolar communication interface circuit 1532.
- the modulation signal output terminal 11 of the ground and unipolar data modulation module 1011 leads to the outside of the unipolar communication interface circuit 1532, respectively, to constitute the signal bus 300.
- the unipolar data modulation module 1011 and the unipolar data demodulation module 102 are connected in common to the working voltage output terminal 31 of the host power system 130, and are powered by the host power system 130.
- Unipolar number According to the modulation module 1011, the unipolar data demodulation module 102 is also grounded 40, that is, connected to the ground.
- the unipolar data modulation module 1011 and the unipolar data demodulation module 102 also have one end connected to the host control module 120 respectively for data interaction with the host control module 120.
- the modulation signal input terminal 12 of the unipolar data modulation module 1011 leads to the outside of the unipolar communication interface circuit 1533, and constitutes the port 20 of the unipolar communication interface circuit 153 3 .
- the modulated signal output terminal 11 of the unipolar data modulation module 1011 leads to the outside of the unipolar communication interface circuit 1533, constituting one of the signal buses 300.
- the other end of the unipolar data demodulation module 102 leads to the outside of the unipolar communication interface circuit 1533, constituting the other of the signal bus 300.
- the unipolar communication interface circuit shown in FIG. 4, FIG. 5, and FIG. 6 described above implements a simplex and two-way host and slave on a DC power supply line (ie, signal bus 300) by a relatively simple implementation.
- a DC power supply line ie, signal bus 300
- the unipolar data modulation module 1011, the unipolar data demodulation module 102, and the output load of the host 100 composed of the parallel network of the slaves 200 are equivalent to being connected in series to the host power system.
- the different connection sequences of the three constitute the above three different embodiments.
- the unipolar data modulation module 1011 is configured to provide the slave 200 with DC power required for operation through the signal bus 300 without transmitting data to the slave 200; and to transmit data to the slave 200 for transmitting the host 100
- the data is loaded on the signal bus 300 output to the slave 200 in the form of a voltage change.
- the unipolar data demodulation module 102 is operative to extract current change information that the slave 200 loads onto the signal bus 300 in the form of a change in the host output load current.
- the unipolar data modulation module 1011 may include an electronic switch 122 and a drive module 111, see FIG.
- One end of the driving module 111 is connected to the working voltage output terminal 31 of the host power system 130, receives the operating voltage output by the host power system 130, and provides the driving module 111 with a low-side driving voltage.
- the drive module 111 also has one end that is commonly grounded 40 with an input of the electronic switch 142.
- the signal input end of the driving module 111 is connected to the host control module 120, and receives the low level pressure control signal output by the host control module 120.
- the signal output end of the driving module 111 is connected to the control end of the electronic switch 122, and converts the received low level control signal into a high level control signal output to control the closing direction of the electronic switch 122.
- the remaining end of the driving module 111 and the other input of the electronic switch 1 22 are connected to the outside of the unipolar data modulation module 1011 to form a modulation signal input terminal 12.
- the modulation signal input terminal 12 is configured to receive a higher communication voltage directly or indirectly provided by the host power system 130 outside the unipolar data modulation module 1011, and provide high-side driving for the driving module 111. Voltage.
- the output of the electronic switch 122 leads to the outside of the unipolar data modulation module 1011 to form a modulated signal output terminal 11.
- the branch of the electronic switch 122 connected to the modulation signal input terminal 12 is turned on, see FIG. 7, the modulation signal output terminal 11 outputs DC power to the slave 200; in the data transmission state, the electronic switch 122 switches between the branch connected to the modulation signal input terminal 12 and the branch connected to the ground line, and outputs the modulated signal to the slave 200, see the waveform shown in Figure 23-1.
- the connection between the unipolar data modulation module 1011 and its external unipolar data demodulation module in FIG. 7 can be embodied as any one of the unipolar data demodulation modules 1021, 1022 or 1023 in the figure. That is, the modulation signal input terminal 12 of the unipolar data modulation module 1011 is connected to the host power system 130 via the unipolar data demodulation module 1021, corresponding to the embodiment shown in FIG. 5; or, the unipolar data modulation module 101 1
- the modulation signal output terminal 11 constitutes one of the signal buses 300 via the unipolar data demodulation module 1022, corresponding to the embodiment shown in FIG. 4; or, the unipolar data demodulation module 1023 is terminated from the unipolar data modulation module.
- the host 100 outputs the power supply to the slave 200, and the presence or absence of the power supply expresses the data 1 or 0 sent by the host 100 to the slave 200. Its working principle is described as:
- the host control module 120 Without transmitting data to the slaves 200 or receiving data returned by the slaves 200, the host control module 120 outputs a low level control to the driver module 111 under the driving action of the driver module 11 The signal is converted to a high level control signal and output to the control terminal of electronic switch 122 such that the branch of electronic switch 122 connected to modulation signal input terminal 12 is closed, as shown in FIG. Thereafter, the host 100 outputs DC power to the slaves 200 via the signal bus 300.
- the host control module 120 transmits a control signal of the low level expression data 1 to the drive module 111; after being driven by the driving module 111, it is converted to high.
- the control signal of the level expression data 1 is sent to the control terminal of the electronic switch 122; the branch of the electronic switch 122 connected to the modulation signal input terminal 12 is closed, as shown in FIG. Thereafter, the modulation signal output terminal 11 of the unipolar data modulation module 1011 outputs a communication voltage.
- the host control module 120 sends a control signal of the low level expression data 0 to the drive module 111; after being driven by the driving module 111, it is converted to high.
- the control signal of the level expressing data 0 is sent to the control terminal of the electronic switch 122; the branch of the electronic switch 122 connected to the ground is closed. Thereafter, the modulated signal output terminal 11 of the unipolar data modulation module 1011 outputs zero voltage.
- the modulated signal output by the unipolar data modulation module 1011 can be represented as the waveform shown in FIG. 23-1.
- V IN is the communication voltage value that the host 100 outputs to the slave 200.
- the voltage on signal bus 300 varies between communication voltage VIN and zero.
- the host communication interface circuit 153 shown in FIG. 3 can also be taken as a bipolar communication interface circuit, including a bipolar data modulation module and a bipolar data demodulation module.
- the specific connection relationship has the following three implementation methods:
- the bipolar data modulation module 1051 and the bipolar data demodulation module 106 are connected in common to the working voltage output terminal 31 of the host power system 130, and are powered by the host power system 130.
- the bipolar data modulation module 1051 is also coupled to the dual polarity data demodulation module 106 to ground 40, that is, to ground.
- the bipolar data modulation module 1051 and the bipolar data demodulation module 106 also have one end connected to the host control module 120 respectively for data interaction with the host control module 120.
- the modulation signal input terminal 19 of the bipolar data modulation module 1051 leads to the outside of the bipolar communication interface circuit 1534 to constitute the port 20.
- the bipolar data demodulation module 106 is configured to extract current change information caused by the host output load of the slave 200 on the signal bus 300 .
- the bipolar data modulation module 1051 and the bipolar data demodulation module 106 are commonly connected to the operating voltage output terminal 31 of the host power system 130, and are powered by the host power system 130.
- the bipolar data modulation module 1051 is also coupled to the dual polarity data demodulation module 106 to ground 40, that is, to ground.
- the bipolar data modulation module 1051 and the bipolar data demodulation module 106 also have one end connected to the host control module 120 respectively for data interaction with the host control module 120.
- the modulation signal input terminal 19 of the bipolar data modulation module 1051 leads to the outside of the bipolar communication interface circuit 1535 via the bipolar data demodulation module 106. , constitutes port 20.
- the two modulated signal outputs 16 and 17 of the bipolar data modulation module 1051 lead to the outside of the bipolar communication interface circuit 1535, respectively, to form the signal bus 300.
- the bipolar data demodulation module 106 is configured to extract current change information caused by the host output load formed by the slaves 200 on the signal bus 30, This information is expressed by the host power system 130 to the output of the bipolar data demodulation module 106.
- the bipolar data modulation module 1052 and the bipolar data demodulation module 106 are connected in common to the working voltage output terminal 31 of the host power system 130, and are powered by the host power system 130.
- the bipolar data modulation module 1052 is also coupled to the dual polarity data demodulation module 106 to ground 40, that is, to ground.
- the bipolar data modulation module 1052 and the bipolar data demodulation module 106 each have one end connected to the host control module 120 respectively for data interaction with the host control module 120.
- the modulation signal input terminal 19 of the bipolar data modulation module 1052 leads to the outside of the bipolar communication interface circuit 1536 to form the port 20.
- the two modulated signal outputs 16 and 17 of the bipolar data modulation module 1052 lead to the outside of the bipolar communication interface circuit 1536, respectively, to form the signal bus 300.
- the remaining ends of the bipolar data modulation module 1052 are coupled to the bipolar data demodulation module 106 .
- the bipolar data demodulation module 106 is configured to extract current change information caused by the host output load of the slave 200 on the signal bus 300 .
- Information is returned to the power reference ground 40 of the host power system 130 via the bipolar data modulation module 1052 and is communicated by the host power system 130 to the output of the bipolar data demodulation module 106.
- the bipolar communication interface circuit shown in FIG. 8, FIG. 9, and FIG. 11 is further optimized on the basis of the unipolar communication interface circuit scheme shown in FIG. 4, FIG. 5, and FIG.
- the polarity data modulation module realizes the output of the power supply to the slave by the host to provide the data sent by the host to the slave in a manner to provide positive and negative communication voltages with respect to the power reference ground 40.
- the advantages are: switching between different transmission data, for example, switching from transmission data 0 to transmission data 1, because the polarity of the output voltage of the host is opposite, therefore, the energy remaining in the equivalent inductance or equivalent capacitance on the signal bus The venting path in the opposite direction is established, so that the data transmission rate of the bipolar communication interface circuit is faster, the signal amplitude changes more, and the anti-interference performance is higher.
- the bipolar data modulation module 1051 includes two driving modules 113 and 114, two electronic switches 126 and 127, and an inverter 301. See Figure 10.
- the two driving modules 113 and 114 are connected to the operating voltage of the host power system 130 in common with the inverter 301.
- the two drive modules 113 and 114 are also commonly grounded 40 with the inverter 301.
- the signal input terminal of the inverter 301 is connected to the signal input terminal of the driving module 114 to the host control module 120, and the signal output terminal of the inverter 301 is connected to the signal input terminal of the driving module 113.
- the signal output of the drive module 113 is connected to the control terminal of the electronic switch 126, and the signal output of the drive module 114 is connected to the control terminal of the electronic switch 127.
- An input of the electronic switch 126, an input of the electronic switch 127, the remaining end of the driving module 113, and the remaining end of the driving module 114 are connected to the outside of the bipolar data modulation module 1051 to form a bipolar data modulation.
- the other input of the electronic switch 126 is coupled to the other input of the electronic switch 127 to ground 40.
- the outputs of the two electronic switches 126 and 127 lead to the outside of the bipolar data modulation module 1051, respectively, forming the two modulated signal outputs 16 and 17 of the bipolar data modulation module 1051.
- connection between the bipolar data modulation module 1051 and its external bipolar data demodulation module in FIG. 10 can be embodied as any one of the bipolar data demodulation modules 1061, 1062 or 1063 in the figure. That is, the modulation signal input terminal 19 of the bipolar data modulation module 1051 is connected to the host power system 130 via the bipolar data demodulation module 1061, corresponding to the embodiment shown in FIG. 9; or, the bipolar data modulation module 1 051
- the modulated signal output 16 or 17 leads to the outside of the bipolar communication interface circuit via the bipolar data demodulation module, constituting one of the signal buses 300, corresponding to the embodiment shown in FIG.
- the remaining connection relationship of the bipolar data demodulation module in FIG. 10 is the same as that in FIG. 8 or FIG. 9 , and will not be described here.
- the bipolar data modulation module 1052 includes two drive modules 115 and 116, two electronic switches 128 and 129, and an inverter 302, see FIG. 12.
- the two drive modules 115 and 116 are coupled in common with the inverter 302 to the operating voltage output 31 of the host power system 130.
- the two drive modules 115 and 116 are also coupled to the inverter 302 in common ground 40.
- the signal input terminal of the inverter 302 is connected to the signal input terminal of the driving module 116 to the host control module 120, and the signal output terminal of the inverter 302 is connected to the signal input terminal of the driving module 115.
- the signal output of the drive module 115 is coupled to the control terminal of the electronic switch 128, and the signal output of the drive module 116 is coupled to the control terminal of the electronic switch 129.
- An input of the electronic switch 128, an input of the electronic switch 129, the remaining end of the driving module 115, and the remaining end of the driving module 116 are connected to the outside of the bipolar data modulation module 1052 to form bipolar data.
- the other input of the electronic switch 128 is connected to the other input of the electronic switch 129 and is external to the bipolar data modulation module 1052.
- the bipolar data demodulation module 106 of the portion is grounded 40.
- the outputs of the two electronic switches 128 and 129 lead to the outside of the bipolar data modulation module 1052, respectively, forming the two modulated signal outputs 16 and 17 of the bipolar data modulation module 1052.
- the host 100 outputs the power supply to the slave 200 to provide positive with respect to the power reference ground 40.
- the way of negative communication voltage expresses its data 1 or 0 transmitted to the slave 200.
- Figure 10 Take Figure 10 as an example to illustrate the working principle of the bipolar data modulation module:
- the host control module 120 After not transmitting data to the slaves 200 or receiving data returned by the slaves 200, under the driving action of the driving modules 1 13 and 114, the host control module 120 outputs to the driving module 114 and via the opposite The low level control signal outputted from the phaser 301 to the driving module 113 is converted into a high level control signal, and output to the control end of the electronic switch 127 and the control end of the electronic switch 126, respectively, so that the electronic switch 127 is connected to the modulated signal. The branch of input 19 is closed and the branch of electronic switch 126 connected to ground 40 is closed, see Figure 10. Thereafter, the host 100 outputs DC power to the slaves 200 via the signal bus 300.
- the host control module 120 sends a low level control signal expressing the data 1 to the driver module 114 and the inverter 301. After the signal is driven by the driving module 114, the control signal of the expression data 1 converted to the high level is sent to the control terminal of the electronic switch 127.
- the control signal converted to the low level expression data 0 is input to the driving module 113; the driving module 113 The control signal of the low level expression data 0 is converted into a high level control signal expressing the data 0, and is output to the control terminal of the electronic switch 126.
- the branch of the electronic switch 127 connected to the modulation signal input terminal 19 is closed, and the branch of the electronic switch 126 connected to the ground line 40 is closed, as shown in FIG. Thereafter, the modulation signal output terminal 17 of the bipolar data modulation module 1051 outputs a communication voltage, and the modulation signal output terminal 16 outputs a zero voltage, that is, outputs the forward communication voltage.
- the host control module 120 sends a low level control signal expressing the data 0 to the driver module 114 and the inverter 301. After the signal is driven by the driving module 114, the control signal converted to the high level of the expression data 0 is sent to the control terminal of the electronic switch 127. In the same manner, after the control signal of the low level expression data 0 output by the host control module 120 is passed through the inverter 301, the control signal of the expression data 1 converted to the low level is input to the driving module 113; the driving module 113 Low level The control signal expressing data 1 is converted to a high level control signal expressing data 1 and output to the control terminal of electronic switch 126.
- the branch of the electronic switch 127 connected to the ground 40 is closed, and the branch of the electronic switch 126 connected to the modulation signal input 19 is closed.
- the modulation signal output terminal 17 of the bipolar data modulation module 1051 outputs a zero voltage
- the modulation signal output terminal 16 outputs the communication voltage
- the host 100 outputs a voltage on the signal bus 300 that is opposite in polarity to the transmission data.
- the signal, that is, the negative communication voltage is output.
- the modulated signal output by the bipolar data modulation module can be represented as the waveform shown in Figure 24-1.
- V IN is the communication voltage value that the host 100 outputs to the slave 200.
- the voltage on signal bus 300 varies between forward communication voltage V IN and negative communication voltage V IN .
- the above-mentioned driving module in FIG. 7, FIG. 10 or FIG. 12 can use a circuit such as 74LS4245 and IR53HD420 which uses a low voltage and a high voltage dual working power supply to convert a low voltage input signal into a high voltage output signal.
- the above unipolar data demodulation module and the bipolar data demodulation module can use a device such as a resistor or an inductor to convert the input current change information into a voltage change information output.
- the slave 200 includes a slave communication interface 210, a rectifier bridge circuit 260, an energy storage module 240, a slave power supply system 230, a slave clock circuit 250, and a slave control module 220, such as Figure 13 shows.
- the specific connection relationship is described as follows:
- the slave communication interface 210 is connected to the slave control module 220, and the data for loading the extracted host 100 onto the signal bus 300 is sent to the slave control module 220 for processing, and the other is The data information that the slave control module 220 needs to send to the host 100 is loaded onto the signal bus 300.
- the slave communication interface 210 is coupled to the power output 35 of the slave power system 230 for accepting the operating voltage and reset signals provided by the slave power system 230.
- the slave communication interface 210 also has an end grounded 50, and the remaining two ends are respectively connected to the signal bus 300 for extracting signals from the bus 300 or loading data onto the bus 300.
- the rectifier bridge circuit 260 is connected to the energy storage module 240, one end is grounded 50, and the other two ends are respectively connected to the signal bus 300.
- the rectifier bridge circuit 260 is used to provide the host 100 to the slave via the signal bus 300.
- the power supply of the machine 200 is polarity-adjusted to achieve a polarity-free connection between the host 100 and the slave 200, and the electrical energy is stored in the energy storage module 240 for use by the slave 200.
- the energy storage module 240-terminal is connected to the rectifying bridge circuit 260, and receives the energy output from the rectifying bridge circuit 260.
- the energy storage module 240 is connected to the power input terminal 36 of the slave power system 230, and is configured to provide the energy stored in the energy storage module 240 to the slave power system 230 during the process of receiving data, and the external power supply is interrupted. It is converted by the slave power supply system 230 into the voltage required for operation of the slave 200.
- the other end of the energy storage module 240 is grounded 50.
- the power input terminal 36 of the slave power system 230 is connected to the energy storage module 240, and the power output terminal 35 is connected to the slave communication interface 210, the slave clock circuit 250, and the slave control module 220, and the rest. One end is grounded to 50.
- the slave power system 230 is configured to convert the energy stored in the energy storage module 240 into a voltage required for operation of the slave 200, and provide it to the slave communication interface 210, the slave clock circuit 250, and the slave control module 220.
- the slave clock circuit 250 is connected to the power output 35 of the slave power system 230, and receives the operating voltage output from the slave power system 230; one end is connected to the slave control module 220, and the slave control module is connected to the slave control module 220. 220 provides the cuckoo clock signal for its operation; the other end of the slave chopper circuit 250 is grounded 50.
- the introduction of the rectifier bridge circuit 260 realizes the polarity conversion of the slave to the input power, thereby eliminating the requirement for the polarity connection of the conventional network communication system, and realizing the between the host 100 and the slave 200.
- the two-wire non-polar connection simplifies the connection process of this master-slave network system and avoids the possibility of slave power failure caused by network connection errors.
- the slave communication interface 210 and the rectifier bridge circuit 260 are connected in parallel between the two signal buses 300, thereby avoiding the influence of the rectifier bridge circuit 260 on the data transmission speed between the master and the slave, and On the one hand, the slave can receive both unipolar modulated data and bipolar modulated data.
- the energy storage module 240 in the slave 200 is used to store the energy provided by the host 100, so that the slave 200 is in a passive working mode, and the energy supply to the entire communication system is only supplied to the host 100. Therefore, the power supply complexity of the system is reduced, and the maintainability of the system is improved.
- the introduction of the energy storage module 240 also causes the slave 200 to exchange data with the host 100, possibly maintaining the slave power system 2 as much as possible.
- the slave communication interface 210 includes a slave data modulation module 201 and a slave data demodulation module 202, and the slave data demodulation module 202 has two slaves.
- the machine data demodulation circuit 212 is constructed as shown in FIG. The specific connection relationship is described as follows:
- Two slave data demodulation circuits 212 are respectively connected to the two signal buses 300, and respectively sample voltage change information on the two signal buses 300.
- the two slave data demodulation circuits 212 are respectively coupled to the slave control module 220, and the voltage change information sampled from the signal bus 300 is sent to the slave control module 220 for processing.
- the two slave data demodulation circuits 212 are commonly connected to the power output 35 of the slave power system 230, and receive the operating power supplied from the slave power system 230 so that the level of the signal output to the slave control module 220 is The operating voltage of the machine control module 220 is substantially the same.
- the two slave data demodulation circuits 212 are also commonly grounded 50.
- the slave data modulation module 201 is connected to the slave control module 220, one end is grounded 50, and the other two ends are respectively connected to the signal bus 300.
- the slave data modulation module 201 is configured to convert the data information expressed by the slave control module 220 and expressed at the high and low levels into a change of the current consumption of the slave, and load it onto the signal bus 300 and send it to the host 100.
- the above-described slave communication interface 210 technical solution has the advantages of: using two identical, independently operating slave data demodulation circuits 212, and connecting the two slave data demodulation circuits 212 to the signals, respectively On the bus 300, the slave 200 can receive both the unipolar modulated data output by the host 100 and the bipolar modulated data output by the host 100. This makes the slave 200 more adaptable and portable for different system communication requirements.
- the slave data modulation module 201 of the present invention may include three resistors 215, 216 and 217, two NMOS transistors 218 and 219, as shown in FIG.
- the drain of the NMOS transistor 218 and the substrate, the drain and pad of the NMOS transistor 219, and one end of the resistor 215 are commonly grounded 50.
- the gate of the NMOS transistor 218, the gate of the NMOS transistor 219, and the other end of the resistor 215 are connected and commonly connected to the slave control module 220.
- the source of the NMOS transistor 218 is coupled to one of the signal buses 300 via a resistor 216
- the source of the NMOS transistor 219 is coupled to the other of the signal bus 300 via a resistor 217.
- the resistor 215 provides a pull-down drive for the gates of the NMOS transistors 218 and 219, and the resistors 216 and 217 are used to convert the voltage change information to the consumption current change information.
- the above-described slave data modulation module 201 realizes loading data to be transmitted in the form of consumption current change.
- On the signal bus 300 its working principle is described as:
- the slave control module 220 When transmitting data 1 ⁇ , the slave control module 220 outputs a high level control signal, then the gate voltages of the NMOS transistors 218 and 219 are high, and the NMOS transistors 218 and 219 are turned on. Thereafter, the current on the bus 300 caused by the slave 200 is: the bus voltage divided by the sum of the resistances of the resistors 216 and 217, which is much larger than the normal operating current of the slave 20.
- the slave 200 when the slave 200 is embodied as an electronic detonator, the current is in the order of milliamps, and the normal operating current of the electronic detonator is on the order of microamps. This facilitates the data demodulation module in the host to extract and identify the data information sent by the slave to it.
- Figure 25-1 shows the voltage control signal output by the slave control module 220, which is the data information to be sent to the host communication interface. After being acted upon by the slave data modulation module 201, the voltage control signal is converted to current consumption information and sent to the signal bus 300, see Figure 25-2.
- V cc is the operating voltage of slave 200.
- the current I H is the current consumption of the slave 200 transmitting data to the host 100
- the current t is the current consumption of the slave 200 transmitting the data to the host 100, that is, the normal operating current of the slave 200. .
- the slave data demodulation circuit 212 in the present invention may include an inverter 303 and a resistor 206 as shown in FIG.
- the inverter 303 is used to extract the data information on the signal bus 300, and one end thereof is connected to the power output terminal 35 of the slave power supply system 230, and one end is grounded 50.
- the signal input of inverter 303 is coupled to one of signal buses 300, which is also coupled to ground 50 via resistor 206.
- the signal output of inverter 303 is coupled to slave control module 2 20.
- the resistor 206 is used to provide a pull-down drive for the signal input end of the inverter 303, which avoids the signal input end of the inverter 303 being in an indeterminate state when the bus 300 is accidentally disconnected, which improves the communication system.
- the resistor 206 also provides a bleed path for the charge remaining on the bus 300, increasing the communication rate.
- the slave data demodulation circuit 212 in the present invention may also include an inverter 304 and an NMOS transistor 207, as shown in FIG.
- the inverter 304 is connected to the power output 35 of the slave power supply system 230, and is grounded at one end 50.
- NM The OS tube 207 provides negative feedback to the signal input of the inverter 304.
- the source of the NMOS transistor 207 and the substrate ground 50; the drain thereof is connected to the signal input terminal of the inverter 304 and is commonly connected to one of the signal bus 300; the gate of the NMOS transistor 207 and the signal of the inverter 304
- the outputs are connected and connected in common to the slave control module 220.
- the above-mentioned slave data demodulation circuit 212 uses the NMOS transistor 207 connected with a negative feedback instead of the pull-down resistor 206.
- the advantage is that the energy consumed by the resistor 206 to the host 100 is avoided, and the utilization efficiency of the host energy is improved.
- the characteristics of the NMOS transistor dynamic resistance are such that when the input of the bus 300 is low, the output of the inverter 304 is at a high level, and the NMOS transistor 207 is in an on state. When the input of the bus 300 is high, the inverter 304 outputs a low level, and the NMOS transistor 207 is turned off.
- the output voltage of the inverter 304 changes from low to high, and the gate voltage of the NMOS transistor 207 also changes from low to high. Thereafter, the NMOS transistor 207 enters the saturation conduction region from the cut-off region via the variable resistance region, and gradually drains the bus residual charge.
- the signal input terminal of the inverter 304 can be in a certain low state due to the presence of the NMOS transistor 207.
- the outputs of the two slave data demodulation circuits 212 are respectively shown in FIG. 23-2.
- the waveform diagram shown in Figure 23-3 In the figure, V ⁇ is the operating voltage of the slave 200.
- the slave data demodulation module 202 demodulates the unipolar modulation data shown in FIG. 23-1 into two signals, and one signal shown in FIG. 23-2 corresponds to the input modulation signal change trend at the operating voltage V.
- the pulse signal that changes between cc and zero level, the other signal shown in Figure 23-3 is a zero-level signal.
- the outputs of the two slave data demodulation circuits 212 are respectively shown in Fig. 24-2.
- V ⁇ is the operating voltage of the slave 200.
- the slave data demodulation module 202 demodulates the bipolar data shown in Figure 24-1 into two signals.
- the one signal shown in Figure 24-2 is opposite to the input modulation signal, at the operating voltage V cc .
- the pulse signal that changes between zero and zero, the other signal shown in Figure 24-3 is a pulse signal that changes between the operating voltage V cc and the zero level corresponding to the change trend of the input modulated signal.
- the inverter 303 and the inverter 304 of the two technical solutions of the above-described slave data demodulation circuit 212 are preferably taken as Schmitt inverters, so that whether the state of the signal of the input inverter is switched or not Slow, that is, whether the level transition transition period is long, the output edge of the inverter is steep, and the output level is turned The transition period is extremely short. This shortens the state transition of the subsequent processing circuit of the slave data demodulation circuit 212, and reduces the power consumption of the slave 200.
- the Schmitt inverter has good noise immunity and can improve the stability of the data received by the slave 200.
- the host 100 in the master-slave DC carrier communication system described above is used in conjunction with the technical solution of the slave 200 to implement a two-wire non-polarity-differentiated peer that can provide DC power to the slave.
- Master-slave DC carrier communication system for simplex bidirectional data transmission.
- the host power system 130 provides only one communication voltage V IN to the host communication interface 150. Therefore, the host 100 transmits data to the slave 200 or receives data sent from the slave 200.
- the bus 300 The voltage on the voltage is always maintained at the communication voltage V IN .
- the present invention can be further improved on the basis of the host technical solution shown in FIG. 2, the communication voltage output terminal 32 of the host power system 130 is refined into a transmission voltage output terminal 34 and a receiving voltage output terminal 33;
- the communication voltage input terminal 51 of the host communication interface 151 is refined into a transmission voltage input terminal 52 and a reception voltage input terminal 53, as shown in FIG.
- the transmit voltage output terminal 34 of the host power system 130 is coupled to the transmit voltage input terminal 52 of the host communication interface 151;
- the receive voltage output terminal 33 of the host power system 130 is coupled to the receive voltage input terminal 53 of the host communication interface 151.
- the host 100 performs data transmission and reception at different voltages, and aims to improve the signal-to-noise ratio of the host 100 receiving the data of the slave 200, thereby improving the master-slave DC carrier communication system composed of the host technical solution. Communication accuracy.
- the host 100 includes a host clock circuit 140, a host power system 130, a host communication interface 1511, and a host control module 120.
- the host communication interface 1511 is further constituted by an electronic switch 121 and a host communication interface circuit 153, as shown in FIG.
- the two input ends of the electronic switch 121 lead to the outside of the host communication interface 1511, respectively forming a transmitting voltage input terminal 52 and a receiving voltage input terminal 53; the output terminal of the electronic switch 121 is connected to the port 20 of the host communication interface circuit 153;
- the control terminal is connected to the host control module 120, and the host control module 120 controls the electronic switch 121 to select the voltage output to the host communication interface circuit 153.
- the host communication interface circuit 153 also has an end ground 40, one end of which is connected to the working voltage output terminal 31 of the host power system 130, and receives the operating voltage provided by the host power system 130.
- the host communication interface circuit 153 also has two ends that lead to the outside of the host communication interface 1511 to form a signal bus 300. The remaining ends of the host communication interface circuit 153 are connected to the host control module 120.
- the electronic switch 121 in the above technical solution completes switching between the transmitting voltage and the receiving voltage under the control of the host control module 120: when the host 100 transmits data to the slave 200, or the host 100 provides work to the slave 200
- the power supply port the host control module 120 sends a control signal indicating the output of the transmission voltage to the control terminal of the electronic switch 121, so that the branch of the electronic switch 121 connected to the transmission voltage output terminal 34 is turned on, and the port 20 of the host communication interface circuit 153 is Connected to the transmit voltage output 34 of the host power system 130, the signal bus 300 is represented as a transmit voltage.
- the host control module 120 sends a control signal indicating the output of the received voltage to the control terminal of the electronic switch 121, so that the branch of the electronic switch 121 connected to the receiving voltage output terminal 33 is turned on.
- the port 20 of the host communication interface circuit 153 is connected to the receiving voltage output terminal 33 of the host power system 130, and the signal bus 300 is represented as a receiving voltage.
- the host communication interface circuit 153 in the above embodiment shown in FIG. 19 can be taken as the unipolar communication interface circuit shown in FIG. 4, FIG. 5 or FIG. 6, and can also be taken as FIG. 8, FIG. 9, or FIG. Bipolar communication interface circuit
- the host 100 includes a host clock circuit 140, a host power system 130, a host communication interface 1512, and a host control module 120.
- the host communication interface 1512 can be taken as a unipolar communication interface composed of a unipolar data modulation module 1012, a unipolar data demodulation module 102, and an electronic switch 123 as shown in FIG. 20, and can also be taken as shown in FIG.
- a bipolar communication interface consisting of a bipolar data modulation module 1051, a bipolar data demodulation module 106, and an electronic switch 125 is shown.
- the specific connection relationship can be described as follows:
- the unipolar/bipolar data modulation module is grounded at one end 40; the terminal is connected to the unipolar/bipolar data demodulation module and is commonly connected to the operating voltage output terminal 31 of the host power system 130. Receiving a stable operating voltage output by the host power system 130.
- the unipolar/bipolar data modulation module is further connected to the host control module 120 at one end, and receives data information output by the host control module 120.
- the modulation signal input terminal of the unipolar/bipolar data modulation module is connected to the transmission voltage output terminal 34 of the host power system 130, constitutes the transmission voltage input terminal 52 of the host communication interface 1512, and receives the transmission voltage output by the host power system 130.
- the other two ends of the unipolar/bipolar data modulation module one end leads to the outside of the host communication interface 1512, constitutes one of the signal buss 300; the other end is connected to one input end of the electronic switch, and provides the transmitting voltage branch to the electronic switch After the data needs to be sent to the slave 200, the electronic switch is selected under the control of the host control module 120. The transmission voltage of this branch is selected and output to the signal bus 300.
- the unipolar/bipolar data demodulation module is grounded at one end 40; the end is connected to the host control module 120, and the received data information is sent to the host control module 120 for processing; one end is connected to the host power system.
- the working voltage output terminal 31 of 130 receives the operating voltage outputted by the host power system 130; one end is connected to the receiving voltage output terminal 33 of the host power system 130, and constitutes the receiving voltage input terminal 53 of the host communication interface 1512; unipolar/bipolar
- the other end of the data demodulation module is connected to the other input end of the electronic switch, and the receiving switch voltage branch is provided to the electronic switch. After receiving the data from the slave, the electronic switch selects the branch under the control of the host control module 120. The received voltage is output to the signal bus 300.
- the unipolar/bipolar data modulation module is directly connected to the transmit voltage output terminal 34 of the host power system 130, unipolar/bipolar
- the data demodulation module is directly connected to the receiving voltage output terminal 33 of the host power system 130, and the electronic switch performs switching of the voltage outputted to the signal bus 300 under the control of the host control module 120.
- the host control module 120 sends a control signal expressing the transmit voltage output to the control terminal of the electronic switch, so that the electronic switch is connected to the branch of the unipolar/bipolar data modulation module.
- the signal bus 300 appears as a transmission voltage.
- the host control module 120 sends a control signal expressing the received voltage output to the control terminal of the electronic switch to connect the electronic switch to the unipolar/bipolar data demodulation module.
- the circuit is turned on, and the signal bus 300 is represented as a receiving voltage.
- the unipolar data modulation module 1012 includes a drive module 112 and an electronic switch 124, as shown in FIG.
- the specific connection relationship is described as follows:
- One end of the driving module 112 is connected to the working voltage output terminal 31 of the host power system 130, receives the operating voltage output by the host power system 130, and supplies the driving module 112 with a low-side driving voltage.
- the signal input end of the driving module 112 is connected to the host control module 120, and receives the low level control signal output by the host control module 120.
- the signal output end of the driving module 112 is connected to the control end of the electronic switch 124, and will receive The low level control signal that is received is converted to a high level control signal output to control the closing direction of the electronic switch 124.
- the drive module 112 also has an end that communicates with an input of the electronic switch 124 to the outside of the unipolar data modulation module 1012 to form a modulation signal input terminal 12.
- the remaining end of the driving module 112 is commonly grounded 40 with the other input of the electronic switch 124 and leads to the outside of the unipolar data modulation module 1012 to form one of the signal buses 300.
- the control terminal of the electronic switch 124 is connected to the signal output terminal of the drive module 112, and receives a high level control signal of its output.
- the output of the electronic switch 124 leads to the outside of the unipolar data modulation module 1012, and the modulation signal output terminal 11 is connected to an input terminal of the electronic switch 123.
- Two inputs of the electronic switch 124 one is grounded 40 with the driving module 112, and leads to the outside of the unipolar data modulation module 1012 to form one of the signal buses 300; the other is connected to the driving module 112 to the unipolar Outside of the data modulation module 1012, a modulation signal input terminal 12 is formed for accepting a higher communication voltage supplied by the host power supply system 130 to the unipolar data modulation module 1012 and providing a high side for the drive module 112. Drive voltage.
- the host 100 in the present invention can transmit unipolar modulated data or bipolar modulated data to the slave 200 via the signal bus 300, and the command sent by the host 100 to the slave 200 can be a global command or a single command.
- the global command is issued for all slaves in the entire communication system.
- each slave performs the corresponding operation and does not return any information to the host.
- a single instruction is issued for a slave in the communication system.
- the slave receives the instruction and performs the corresponding operation, it returns the result of the execution of the instruction to the host.
- FIG. 26 shows a voltage waveform diagram of the unipolar global command signal bus 300 transmitted by the host 100 shown in FIG. 18 to the slave 200.
- the host 100 transmits a complete local command to the slave 200 under the transmission voltage V TXD
- the host 100 returns to the state of charging the slave 200.
- the host 100 sends a single command to the slave 200 under the transmit voltage V TXD
- the host 100 enters a state of replenishing energy to the slave 200 after the command is sent, and continues to preset.
- the inter-turn length T in order to supplement the slave receiver with the data consumed by the energy storage module 240 inside the slave.
- V TXD in the figure is the voltage output from the transmission voltage output terminal 34 of the host power supply system 130
- V RXD is the voltage output from the reception voltage output terminal 33 of the host power supply system 130.
- FIG. 27 shows a voltage waveform diagram of the host 100 shown in FIG. 18 transmitting a bipolar single command signal bus 300 to the slave 200.
- the host 100 transmits a single instruction to the slave 200 under V TXD and switches the voltage on the signal bus 300 to the receiving voltage V after charging the preset inter-length T.
- the RXD waits to receive the information returned from the slave 200, and returns to the state of charging the slave after receiving. If the host 100 sends a global command to the slave 200, the host directly returns to the state of charging the slave after transmitting the command, and does not receive data.
- the communication voltage output terminal 32 of the host power supply system of the present invention can be further refined into a transmit voltage output terminal 34 and a receive voltage output terminal 33, and preferably the output voltage of the transmit voltage output terminal 34 is higher than the receive voltage.
- the voltage output from the voltage output terminal 33 is:
- the host 100 When the host 100 is in the non-communication state and the transmit data state, the host 100 outputs a higher transmit voltage to the signal bus 300 to provide charging energy for the energy storage module 240 inside the slave 200.
- the host 100 When the host 100 is to receive the data transmitted by the slave 200, if the host 100 still outputs a higher transmission voltage to the signal bus 300, the energy storage module 240 inside the slave 200 will continue to obtain the charging energy from the signal bus 300. This may cause current noise on the bus 300, which may reduce the signal-to-noise ratio of the host receiving data.
- the host 100 receives the data transmitted from the slave 200, reducing the voltage output by the host 100 to the signal bus 300, so that the voltage on the bus 300 is lower than the voltage of the internal energy storage module 240 of the slave 200, then the network All slaves 200 will be powered by their own energy storage modules 240 to maintain their own operation. This avoids the current noise generated by the slaves 200 acquiring the charging energy from the bus 300 after receiving data from the host, thereby improving the signal-to-noise ratio of the data transmitted by the slave and improving the reliability of the data received by the master.
- the host shown in FIG. 18 and its refinement scheme can be used in conjunction with the slave in the present invention to achieve the technical object of the present invention.
- the slave After receiving the data sent by the host of the solution, the slave is demodulated by its internal slave data demodulation module 202 and output to the slave control module 220 for processing.
- Demodulated output for unipolar data The same waveforms as in Figs. 23-2 and 23-3, the bipolar data is demodulated and output the same waveform as in Figs. 24-2 and 24-3.
- the master-slave DC carrier communication system of the present invention can be used in an electronic detonator detonating network.
- the host 100 of the present invention is embodied as an electronic detonator detonating device
- the slave 200 is embodied as an electronic detonator.
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Abstract
Description
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Priority Applications (3)
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EA201100721A EA021702B1 (ru) | 2008-11-07 | 2009-11-06 | Система связи в режиме ведущий-ведомый |
AU2009311067A AU2009311067B2 (en) | 2008-11-07 | 2009-11-06 | Master-slave mode direct current carrier communication system |
ZA2011/04191A ZA201104191B (en) | 2008-11-07 | 2011-06-06 | Master-slave mode direct current carrier communication system |
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CN200810172410.9 | 2008-11-07 | ||
CN2008101724109A CN101404521B (zh) | 2008-11-07 | 2008-11-07 | 主从式直流载波通信***及其控制方法 |
CN200920000509.0 | 2009-01-06 | ||
CNU2009200005090U CN201369720Y (zh) | 2009-01-06 | 2009-01-06 | 主从式直流载波通信*** |
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PCT/CN2009/074837 WO2010051767A1 (zh) | 2008-11-07 | 2009-11-06 | 主从式直流载波通信*** |
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AU (1) | AU2009311067B2 (zh) |
EA (1) | EA021702B1 (zh) |
WO (1) | WO2010051767A1 (zh) |
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Cited By (3)
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CN105953667A (zh) * | 2016-05-11 | 2016-09-21 | 北京煋邦数码科技有限公司 | 一种采用高效精准通信方法的智能芯片*** |
CN109660282A (zh) * | 2018-12-24 | 2019-04-19 | 深圳先进技术研究院 | 一种电源接口的通信装置及通信方法 |
WO2024007646A1 (zh) * | 2022-07-07 | 2024-01-11 | 深圳市帝拓电子有限公司 | 一种直流电力载波式通讯电路及方法 |
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ITCS20110019A1 (it) * | 2011-07-14 | 2013-01-15 | E D P Srl | Sistema e dispositivo di trasmissione/ricezione dati su linea di alimentazione in corrente continua |
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CN101404521A (zh) * | 2008-11-07 | 2009-04-08 | 北京铱钵隆芯科技有限责任公司 | 主从式直流载波通信***及其控制流程 |
-
2009
- 2009-11-06 WO PCT/CN2009/074837 patent/WO2010051767A1/zh active Application Filing
- 2009-11-06 AU AU2009311067A patent/AU2009311067B2/en active Active
- 2009-11-06 EA EA201100721A patent/EA021702B1/ru not_active IP Right Cessation
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2011
- 2011-06-06 ZA ZA2011/04191A patent/ZA201104191B/en unknown
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CN2588710Y (zh) * | 2002-11-28 | 2003-11-26 | 珠海市海港电器企业有限公司 | 一种楼宇内部通讯对讲*** |
US20060224278A1 (en) * | 2005-03-31 | 2006-10-05 | Yazaki Corporation | Power line communication system |
CN101216992A (zh) * | 2008-01-04 | 2008-07-09 | 西安电力机械制造公司 | 一种电力***数据传输装置 |
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CN105953667A (zh) * | 2016-05-11 | 2016-09-21 | 北京煋邦数码科技有限公司 | 一种采用高效精准通信方法的智能芯片*** |
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CN109660282B (zh) * | 2018-12-24 | 2023-10-03 | 深圳先进技术研究院 | 一种电源接口的通信装置及通信方法 |
WO2024007646A1 (zh) * | 2022-07-07 | 2024-01-11 | 深圳市帝拓电子有限公司 | 一种直流电力载波式通讯电路及方法 |
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AU2009311067B2 (en) | 2014-02-13 |
EA021702B1 (ru) | 2015-08-31 |
ZA201104191B (en) | 2012-09-26 |
AU2009311067A1 (en) | 2011-06-23 |
EA201100721A1 (ru) | 2011-12-30 |
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