CN209858985U - LDN-based distributed control system, device and intelligent furniture - Google Patents
LDN-based distributed control system, device and intelligent furniture Download PDFInfo
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- CN209858985U CN209858985U CN201920986394.0U CN201920986394U CN209858985U CN 209858985 U CN209858985 U CN 209858985U CN 201920986394 U CN201920986394 U CN 201920986394U CN 209858985 U CN209858985 U CN 209858985U
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Abstract
The utility model relates to a distributed control system, a device and intelligent furniture based on LDN, wherein, the control system comprises a master node control module and at least one slave node control module; the master node control module is respectively communicated with at least one slave node control module in parallel through the same communication line; the master node control module is suitable for sending control communication signals to the plurality of slave node control modules to control the back-end device. The original centralized control mode is changed into a distributed control mode, the wiring harness constraint between the slave node and the master node is reduced, the circuit structure is simple, the performance requirement of the single chip microcomputer is reduced, the communication precision requirement CAN be met without an external crystal oscillator and an RC oscillator inside the single chip microcomputer, meanwhile, a communication line is formed by three wiring harnesses, and the traditional communication line is simplified to comprise at least four wires, such as a power line, a grounding line and two communication lines (CAN bus mode).
Description
Technical Field
The utility model relates to a control field, concretely relates to distributed control system, device and intelligent furniture based on LDN.
Background
The current control mode of intelligent furniture adopts centralized control, controls a plurality of devices through a singlechip promptly, for example intelligent sofa adopts a singlechip, controls a plurality of motors, lamp area, lamp cup, audio amplifier etc. of sofa to lead to increasing the demand to the singlechip pin, require to increase to the performance of singlechip, lead to the cost-push.
How to solve the above problems is a need to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a distributed control system, device and intelligent furniture based on LDN.
In order to solve the technical problem, the utility model provides a distributed control system based on LDN, include:
a master node control module and at least one slave node control module;
the master node control module is respectively communicated with at least one slave node control module in parallel through the same communication line;
the master node control module is suitable for sending control communication signals to the plurality of slave node control modules to control the back-end device.
Further, the main node control module comprises a main node single chip microcomputer, a power supply and a main bus transceiving unit;
the main node single chip microcomputer is electrically connected with the main bus transceiving unit;
the master bus transceiving unit is suitable for modulating a control signal sent by the master node singlechip into a control communication signal through the power supply voltage of a power supply and transmitting the control communication signal to each slave node control module through a communication line;
the master bus transceiver unit is also suitable for receiving feedback communication signals of each slave node control module through a communication line and sending the feedback communication signals to the master node single chip microcomputer.
Further, the main bus transceiver unit includes a modulation circuit and a demodulation circuit;
the modulation circuit is suitable for modulating a control signal sent by the master node singlechip into a communication signal through the power supply voltage of a power supply and sending the communication signal to each slave node control module;
the demodulation circuit is suitable for demodulating the feedback communication signal sent by the slave node control module and then sending the demodulated signal to the master node single chip microcomputer.
Furthermore, the slave node control module comprises a slave node singlechip, a slave bus transceiving unit and a driving unit;
the slave node single chip microcomputer is electrically connected with the slave bus transceiving unit and the driving unit respectively;
the slave node single chip microcomputer is suitable for receiving the communication signal through the slave bus transceiving unit and completing control over a rear-end device through a driving unit;
the slave bus transceiving unit is suitable for modulating a feedback signal sent by the slave node singlechip into a feedback communication signal through the power supply voltage of a power supply and transmitting the feedback communication signal to the master bus transceiving unit through a communication line.
In a second aspect, the present invention also provides a device, including: a control module; the control module includes: the system comprises a singlechip, a power supply and a bus transceiving unit; the single chip microcomputer is electrically connected with the bus transceiving unit; the bus transceiving unit is suitable for modulating a control signal sent by the singlechip into a control communication signal through the power supply voltage of a power supply and sending the control communication signal through a communication line; the bus transceiver unit is also suitable for receiving feedback communication signals through a communication line and sending the feedback communication signals to the single chip microcomputer.
A third aspect, the utility model also provides an intelligent furniture, include: the system comprises a master control module used for sending control instructions and a slave control module used for receiving the control instructions to control the execution of a back-end device; the master control module is respectively communicated with at least one slave control module in parallel through the same communication line.
The utility model has the advantages that the utility model provides a distributed control system based on LDN, which comprises a master node control module and at least one slave node control module; the master node control module is respectively communicated with at least one slave node control module in parallel through the same communication line; the master node control module is suitable for sending control communication signals to the plurality of slave node control modules to control the back-end device. The original centralized control mode is changed into a distributed control mode, the wiring harness constraint between the slave node and the master node is reduced, the circuit structure is simple, the performance requirement of the single chip microcomputer is reduced, the communication precision requirement CAN be met without an external crystal oscillator and an RC oscillator inside the single chip microcomputer, meanwhile, a communication line is formed by three wiring harnesses, and the traditional communication line comprises at least four wires, such as a power line, a grounding line and two communication lines (CAN bus mode).
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a distributed control system based on LDN provided by the present invention.
Fig. 2 is a schematic connection diagram of a gateway node corresponding to two master nodes of an LDN bus at the same time.
Fig. 3 is a schematic connection diagram of the gateway node corresponding to the slave nodes of two LDN buses at the same time.
Fig. 4 is a schematic connection diagram of a gateway node corresponding to a master node of one LDN bus and a slave node of another LDN bus.
Fig. 5 is a schematic circuit diagram of the main bus transceiver unit provided by the present invention.
Fig. 6 is a schematic diagram of a message structure provided by the present invention.
Fig. 7 is a flowchart of a communication protocol execution process provided by the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Example 1
As shown in fig. 1, this embodiment 1 provides a control system based on an LDN (Low-cost Distributed Network), which includes: a master node control module and at least one slave node control module; the master node control module is respectively communicated with at least one slave node control module in parallel through the same communication line; the master node control module is suitable for sending control communication signals to the plurality of slave node control modules to control the back-end device. The original centralized control mode is changed into a distributed control mode, the wiring harness constraint between the slave node and the master node is reduced, the circuit structure is simple, the performance requirement on the single chip microcomputer is reduced, and the communication precision requirement can be met without an external crystal oscillator and an RC oscillator in the single chip microcomputer. Meanwhile, a communication line is formed by three wire harnesses, so that the traditional communication line is simplified to comprise at least four wires, such as a power line, a grounding wire and two communication lines (CAN bus mode), and great convenience is brought to the connection.
The communication method adopted by the LDN-based distributed control system is defined as LDN bus, and it can adopt various bus connection methods, as shown in fig. 2-4, the gateway node in fig. 2 is a connection diagram corresponding to the master nodes of two LDN buses, the gateway node in fig. 3 is a connection diagram corresponding to the slave nodes of two LDN buses, and the gateway node in fig. 4 is a master node of one LDN bus and a connection diagram corresponding to the slave node of another LDN bus.
The three connection modes are only illustrative, for example, but not limited to the three connection modes, and as can be seen from the three LDN bus communication modes, the control system can be decentralized in the connection because the bus transceiver units of the master node control module and the slave node control module have the same structure, and the slave nodes can also be used as master nodes in the network for node expansion.
In this embodiment, the master node control module includes a master node single chip, a power supply, and a master bus transceiver unit; the main node single chip microcomputer is electrically connected with the main bus transceiving unit; the master bus transceiving unit is suitable for modulating a control signal sent by the master node singlechip into a control communication signal through the power supply voltage of a power supply and transmitting the control communication signal to each slave node control module through a communication line; the master bus transceiver unit is also suitable for receiving feedback communication signals of each slave node control module through a communication line and sending the feedback communication signals to the master node single chip microcomputer.
Specifically, the main bus transceiver unit includes a modulation circuit and a demodulation circuit; the modulation circuit is suitable for modulating a control signal sent by the master node singlechip into a communication signal through the power supply voltage of a power supply and sending the communication signal to each slave node control module; the demodulation circuit is suitable for demodulating the feedback communication signal sent by the slave node control module and then sending the demodulated signal to the master node single chip microcomputer. The circuit diagram of the main bus transceiver unit is shown in fig. 5, the modulation circuit adopts a composite tube U3, the demodulation circuit adopts a composite tube U4, and the demodulation circuit performs signal transmission with the communication line LDN through the same signal line, so that the manner that the CAN bus performs signal transmission with two communication lines is changed, and the number of harnesses of the communication lines is reduced. The output voltage of the power supply can be in the range of (5V-40V) and can be adaptively modulated at high and low levels, so that the compatibility of signal transmission is improved.
In this embodiment, the triode is adopted by the main bus transceiver unit, and in other embodiments, any switching tube such as mos tube can be used instead, as long as the same purpose of this embodiment can be achieved, which is all within the protection scope of the present invention.
In this embodiment, the slave node control module includes a slave node single chip microcomputer, a slave bus transceiver unit, and a driving unit; the slave node single chip microcomputer is electrically connected with the slave bus transceiving unit and the driving unit respectively; the slave node single chip microcomputer is suitable for receiving the communication signal through the slave bus transceiving unit and completing control over a rear-end device through a driving unit; the slave bus transceiving unit is suitable for modulating a feedback signal sent by the slave node singlechip into a feedback communication signal through the power supply voltage of a power supply and transmitting the feedback communication signal to the master bus transceiving unit through a communication line. Through set up miniature singlechip in the slave node and carry out the communication to split the communication of the singlechip of the high performance that uses in the centralized before and go on in each miniature singlechip, thereby reduced control cost.
The operation principle of the circuits of the master bus transceiver unit and the slave bus transceiver unit is completely the same, so that when the LDN bus is formed, the uniqueness of the master node is not considered, and the network wiring cost is reduced.
The LDN-based distributed control system adopts the communication protocol for communication. The communication line adopts a physical level as a ground level, namely '0', and adopts a node power supply voltage as a high level, namely '1'. And a special communication protocol is adopted for communication, so that the communication efficiency is improved, and the adaptability is strong. A communication line is formed by three wire harnesses, so that the traditional communication line comprises at least four wires, such as a power line, a grounding wire and two communication lines (CAN bus mode).
Referring to fig. 6, in this embodiment, the message structure of the communication protocol includes: sync start field, data length + ID, function ID, data field, and CRC check. The Byte length of each part in the message structure is 14bits, the synchronous start field is 14bits, the data length + ID is 1Byte, the function ID is 1Byte, the data field is 0-8Byte, and the CRC check is 1 Byte.
Referring to fig. 7, in the present embodiment, the communication protocol executing process includes:
s1: the synchronous start monitoring state, i.e., 14 uniform level values of the synchronous start field are monitored, and go to S2;
the number of the uniform level values of the start field corresponds to the number of bytes of the start field, and the corresponding number can be set as required.
S2: the data length + ID read state, i.e., reading and processing the bytes of data length + ID, times out back to S1, does not time out to S3;
s3: function ID read state, i.e., reading and processing bytes of function ID, timed out back to S1, not timed out to S4;
s4: the data segment read state, i.e., reading bytes of the data field, times out back to S1 without timing out to S5;
s5: check state, i.e., checking the bytes for CRC checking, the timeout or completion check returns to S1.
Example 2
On the basis of embodiment 1, this embodiment 2 provides an apparatus including: a control module;
the control module includes: the system comprises a singlechip, a power supply and a bus transceiving unit; the single chip microcomputer is electrically connected with the bus transceiving unit; the bus transceiving unit is suitable for modulating a control signal sent by the singlechip into a control communication signal through the power supply voltage of a power supply and sending the control communication signal through a communication line; the bus transceiver unit is also suitable for receiving feedback communication signals through a communication line and sending the feedback communication signals to the single chip microcomputer.
The control module may be equivalent to the master node control module described in embodiment 1, and after a driving unit is added to the control module, the control module may be equivalent to the slave node control module described in embodiment 1, and the communication principles thereof are the same.
The control module is integrated in the device, so that a plurality of devices can be connected through the LDN bus, the communication cost is reduced, and the connection of the devices is more convenient.
The device can be an electric push rod, a motor, an intelligent socket, a lamp, a hand controller, a wireless gateway and other equipment.
Example 3
On the basis of embodiment 1, this embodiment 3 provides an intelligent furniture, including: the system comprises a master control module used for sending control instructions and a slave control module used for receiving the control instructions to control the execution of a back-end device; the master control module is respectively communicated with at least one slave control module in parallel through the same communication line.
The main control module in the intelligent furniture is equivalent to the main node control module in the control system in the embodiment 1, the slave control module is equivalent to the slave node control module in the control system, and the communication principle is the same as that in the control system.
Smart furniture may be, but is not limited to, electric beds, electric sofas, and the like.
In this embodiment, the electric sofa is taken as an example, the master control module may be disposed in the hand controller, the slave control module may be disposed in the electric push rod, and the rear device is specifically a driving motor in the electric push rod, and may also be peripherals such as a lamp cup and an atmosphere lamp.
The realization process of the electric bed is similar to that of an electric sofa.
After the intelligent furniture adopts the LED communication mode, the corresponding functions of the traditional master control circuit board integrating various drive circuits and control functions are shared to be realized by the slave control modules, the purpose of going to the center is realized, the design can reduce the failure rate of the intelligent furniture, the phenomenon of integral paralysis caused by the failure of the master control circuit board is avoided, and in the process of maintenance and replacement, only the corresponding rear device needs to be replaced, so that the maintenance cost is reduced.
To sum up, the utility model provides a distributed control system based on LDN, which comprises a master node control module and at least one slave node control module; the master node control module is respectively communicated with at least one slave node control module in parallel through the same communication line; the master node control module is suitable for sending control communication signals to the plurality of slave node control modules to control the back-end device. The original centralized control mode is changed into a distributed control mode, the wiring harness constraint between the slave node and the master node is reduced, the circuit structure is simple, the performance requirement of the single chip microcomputer is reduced, the communication precision requirement CAN be met without an external crystal oscillator and an RC oscillator inside the single chip microcomputer, meanwhile, a communication line is formed by three wiring harnesses, and the traditional communication line comprises at least four wires, such as a power line, a grounding line and two communication lines (CAN bus mode).
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. An LDN-based distributed control system, comprising:
a master node control module and at least one slave node control module;
the master node control module is respectively communicated with at least one slave node control module in parallel through the same communication line;
the master node control module is suitable for sending control communication signals to the plurality of slave node control modules to control the back-end device.
2. The LDN-based distributed control system of claim 1,
the main node control module comprises a main node single chip microcomputer, a power supply and a main bus transceiving unit;
the main node single chip microcomputer is electrically connected with the main bus transceiving unit;
the master bus transceiving unit is suitable for modulating a control signal sent by the master node singlechip into a control communication signal through the power supply voltage of a power supply and transmitting the control communication signal to each slave node control module through a communication line;
the master bus transceiver unit is also suitable for receiving feedback communication signals of each slave node control module through a communication line and sending the feedback communication signals to the master node single chip microcomputer.
3. The LDN-based distributed control system of claim 2,
the main bus transceiving unit comprises a modulation circuit and a demodulation circuit;
the modulation circuit is suitable for modulating a control signal sent by the master node singlechip into a communication signal through the power supply voltage of a power supply and sending the communication signal to each slave node control module;
the demodulation circuit is suitable for demodulating the feedback communication signal sent by the slave node control module and then sending the demodulated signal to the master node single chip microcomputer.
4. The LDN-based distributed control system of claim 2,
the slave node control module comprises a slave node singlechip, a slave bus transceiving unit and a driving unit;
the slave node single chip microcomputer is electrically connected with the slave bus transceiving unit and the driving unit respectively;
the slave node single chip microcomputer is suitable for receiving the communication signal through the slave bus transceiving unit and completing control over a rear-end device through a driving unit;
the slave bus transceiving unit is suitable for modulating a feedback signal sent by the slave node singlechip into a feedback communication signal through the power supply voltage of a power supply and transmitting the feedback communication signal to the bus transceiving unit of the master node through a communication line.
5. An apparatus, comprising: a control module;
the control module includes: the system comprises a singlechip, a power supply and a bus transceiving unit;
the single chip microcomputer is electrically connected with the bus transceiving unit;
the bus transceiving unit is suitable for modulating a control signal sent by the singlechip into a control communication signal through the power supply voltage of a power supply and sending the control communication signal through a communication line;
the bus transceiver unit is also suitable for receiving feedback communication signals through a communication line and sending the feedback communication signals to the single chip microcomputer.
6. An intelligent furniture, comprising: the system comprises a master control module used for sending control instructions and a slave control module used for receiving the control instructions to control the execution of a back-end device; wherein
The master control module is respectively communicated with at least one slave control module in parallel through the same communication line.
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| CN201920986394.0U CN209858985U (en) | 2019-06-27 | 2019-06-27 | LDN-based distributed control system, device and intelligent furniture |
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| CN201920986394.0U CN209858985U (en) | 2019-06-27 | 2019-06-27 | LDN-based distributed control system, device and intelligent furniture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275468A (en) * | 2019-06-27 | 2019-09-24 | 上海同星智能科技有限公司 | Dcs, method based on LDN, communications protocol, device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275468A (en) * | 2019-06-27 | 2019-09-24 | 上海同星智能科技有限公司 | Dcs, method based on LDN, communications protocol, device |
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