CN109857010B - Control method for realizing real-time power supply and bidirectional communication by double lines - Google Patents
Control method for realizing real-time power supply and bidirectional communication by double lines Download PDFInfo
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Abstract
The invention relates to the technical field of communication control, and particularly discloses a control method for realizing real-time power supply and bidirectional communication by two wires, which comprises a main control PCB and a plurality of auxiliary PCBs, wherein the main control PCB is connected with the auxiliary PCBs through two wires, namely P < + > and P < - >, respectively, and the control method comprises the following steps: when the PCB works normally, the main control PCB realizes the power supply of the auxiliary PCB, and the auxiliary PCB carries out normal discharge and predefined work; when the working state of the auxiliary PCB needs to be changed, the sending signal of the main control PCB is controlled through a self-defined switch signal, and after the corresponding auxiliary PCB receives the signal, the action which needs to be executed by the auxiliary PCB is determined according to a software self-defined protocol; when the auxiliary PCB feeds back information to the main control PCB, after the main control PCB sends data for changing the working state, the auxiliary PCB sends a feedback signal to the main control PCB.
Description
Technical Field
The invention relates to the technical field of communication control, in particular to a control method for realizing real-time power supply and bidirectional communication by two wires.
Background
With the development of science and technology and the improvement of the living standard of people, various robots or automation equipment and the like are widely applied, and related technologies are continuously promoted, for example, a dust collector adopts the working principle that a motor is used for driving blades to rotate at a high speed, air negative pressure is generated in a sealed shell to absorb dust, so that convenience is brought to the sanitary cleaning work in the life of people, and the dust collector is favored by more and more consumers.
With the wide application of the dust collector, people have higher and higher requirements on the function of the dust collector, and in most of dust collector control circuit products, a plurality of wires are required for the transmission and power supply of various control signals. As shown in fig. 1, one main control PCB needs to control one or more sub-PCB and needs to master the working state of each sub-PCB, and power lines and signal lines are usually separately and independently connected between the PCB boards to achieve the purpose of power supply and information transmission, resulting in that many products are designed to be the end, and more wire interfaces are used, for example, if a serial port mode is used for power supply and communication, 3 to 4 wires are needed, if IIC, USB, etc., 4 wires are needed, and if other control modes are used, the number of wires needed may be more.
Disclosure of Invention
Aiming at the technical problems, the invention provides a control method for realizing real-time power supply and bidirectional communication by two wires, which can effectively reduce the use of connecting wires and finish the sharing of communication state information.
In order to solve the technical problems, the invention provides the following specific scheme: a control method for realizing real-time power supply and two-way communication by two wires comprises a main control PCB and a plurality of auxiliary PCBs, wherein the main control PCB and the plurality of auxiliary PCBs are respectively connected by two wires of P < + > and P < - >, and the control method comprises the following steps:
when the PCB works normally, the main control PCB realizes the power supply of the auxiliary PCB, and the auxiliary PCB carries out normal discharge and predefined work;
when the working state of the auxiliary PCB needs to be changed, the sending signal of the main control PCB is controlled through a self-defined switch signal, and after the corresponding auxiliary PCB receives the signal, the action which needs to be executed by the auxiliary PCB is determined according to a software self-defined protocol;
when the auxiliary PCB feeds back information to the main control PCB, after the main control PCB sends data for changing the working state, the auxiliary PCB sends a feedback signal to the main control PCB.
Preferably, the master control PCB is provided with a master control micro control processor, a master control signal receiving module and a master control command sending module, the master control signal receiving module is connected with the master control micro control processor, the master control signal receiving module is connected with the master control command sending module, the master control power module provides power for the master control PCB, the master control command sending module sends the action command to the secondary PCB, and the master control signal receiving module receives feedback information sent by the secondary PCB.
Preferably, be equipped with the little control processor of subplate, the subplate order receiving module and the subplate order sending module of being connected with the little control processor of subplate on the subplate PCB, subplate order sending module connects subplate order receiving module, subplate order receiving module is connected with subplate power module, and subplate power module provides the power for the subplate PCB, and subplate order sending module puts feedback information to main control PCB, and subplate order receiving module receives the action command that main control PCB sent.
Preferably, the master control command sending module comprises an MOS transistor Q1, a D pole of the MOS transistor Q1 is connected to the master control power supply module, an S pole is connected to the master control signal receiving module, and a G pole is connected to the master control micro control processor;
the auxiliary board command receiving module comprises a triode Q3, a resistor R2, a resistor R3 and a resistor R5, the B pole of the triode Q3 is respectively connected with a resistor R2 and a resistor R5, the C pole of the triode Q3 is respectively connected with a resistor R3 and an auxiliary board micro-control processor, the E pole of the triode Q3 is respectively connected with the other end of the resistor R5 and the auxiliary board command sending module, the other end of the resistor R3 is connected with a power supply VCC, and the other end of the resistor R2 is respectively connected with the auxiliary board command sending module and the auxiliary board power supply module.
Preferably, when the working state of the sub-PCB needs to be changed, the controlling the transmission signal of the main control PCB by the self-defined switch signal specifically includes:
the master micro-control processor controls the switching state of the MOS transistor Q1 to complete the transmission of 0 or 1 digit.
Preferably, a diode D1 is further connected between the sub board command receiving module and the sub board power supply module, and the diode D1 can ensure the realization of communication digitization, so that the sub board PCB accurately receives the instruction sent by the main control PCB and correctly sends the state information to the main control PCB.
Preferably, the auxiliary board power supply module comprises a voltage regulator U1 and a capacitor C1 connected with the voltage regulator U1, one end of the capacitor C1 is connected to a power VCC, the other end of the capacitor C1 is grounded, and the size of the capacitor C1 determines the time length of the auxiliary board PCB that can normally work after the control switch signal of the main control PCB is turned off and also determines the size of the communicable data capacity.
Preferably, the master control command sending module is connected with a TX port or a general IO port of the master control micro control processor, and the master control signal receiving module is connected with an RX port or a general IO port of the master control micro control processor.
Preferably, the power source VCC is a battery pack input or a dc power source input, and other integrated LDO or discrete components may also perform this function.
Compared with the prior art, the invention has the beneficial effects that: the invention modulates the power discharge end through the master control PCB, configures the power switch signal, completes the sharing of communication state information, effectively reduces the use of connecting wires, strengthens the control of the master control PCB on each auxiliary PCB, can also reduce the defects of production links, reduces the design space and the like, particularly in the robot industry, needs to control and receive the state of each subordinate board, does not need to keep communication all the time, and has great use value for energy-saving design.
Drawings
FIG. 1 is a schematic diagram of a prior art multi-wire connection;
FIG. 2 is a block diagram of power supply and signal transmission between a main control PCB and a sub-PCB according to an embodiment of the present invention;
FIG. 3 is a block diagram of power supply and signal transmission between a main control PCB and two sub-PCBs in an embodiment of the present invention;
FIG. 4 is a flow chart of a method according to an embodiment of the present invention.
Detailed Description
In order to explain the technical solution of the present invention in detail, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiment of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
For example, a control method for realizing real-time power supply and bidirectional communication by two wires comprises a main control PCB and a plurality of auxiliary PCBs, wherein the main control PCB and the plurality of auxiliary PCBs are respectively connected by P + and P-two wires, and the control method comprises the following steps:
when the PCB works normally, the main control PCB realizes the power supply of the auxiliary PCB, and the auxiliary PCB carries out normal discharge and predefined work;
when the working state of the auxiliary PCB needs to be changed, the sending signal of the main control PCB is controlled through a self-defined switch signal, and after the corresponding auxiliary PCB receives the signal, the action which needs to be executed by the auxiliary PCB is determined according to a software self-defined protocol;
when the auxiliary PCB feeds back information to the main control PCB, after the main control PCB sends data for changing the working state, the auxiliary PCB sends a feedback signal to the main control PCB.
In the embodiment, the power supply discharge end is modulated by the main control PCB, the power supply switch signal is configured, the sharing of communication state information is completed, the use of connecting wires is effectively reduced, the control of the main control PCB on each auxiliary PCB is enhanced, the defects of production links can be reduced, the design space is reduced, and the like.
In one embodiment, as shown in fig. 2 and 4, a control method for realizing real-time power supply and bidirectional communication by two wires is provided, which includes a main control PCB and a plurality of sub-PCB, the main control PCB and the plurality of sub-PCB are connected by two wires P + and P-, respectively, the control method includes the following steps:
s10, when the PCB works normally, the main control PCB realizes the power supply of the auxiliary PCB, and the auxiliary PCB carries out normal discharge and predefined work;
s20, when the working state of the auxiliary PCB needs to be changed, the sending signal of the main control PCB is controlled through the self-defined switch signal, and after the corresponding auxiliary PCB receives the signal, the action which needs to be executed by the auxiliary PCB is determined according to the software self-defined protocol;
and S30, when the auxiliary PCB feeds back information to the main control PCB, after the main control PCB sends the data for changing the working state, the auxiliary PCB sends a feedback signal to the main control PCB.
Specifically, in this embodiment, the main control PCB mainly realizes power supply and controls the sub-PCB, the sub-PCB may be a driving circuit of a motor or other devices, the main control PCB is connected with the plurality of sub-PCBs only through two wires, respectively, when the main control PCB needs to send a control command or status to the sub-PCB, the switch status is defined through design, the internal components of the main control PCB and the sub-PCB are configured, signal transmission and reception are achieved, and the sub-PCB replies a corresponding working status signal after transmission.
In one embodiment, the main control PCB is provided with a main control micro-control processor, a main control signal receiving module and a main control command sending module, the main control signal receiving module is connected with the main control micro-control processor, the main control signal receiving module is connected with the main control command sending module, the main control command sending module is connected with a main control power supply module, the main control power supply module provides power for the main control PCB, the main control command sending module sends an action command to the auxiliary PCB, and the main control signal receiving module receives feedback information sent by the auxiliary PCB; the auxiliary board command receiving module and the auxiliary board command sending module are arranged on the auxiliary board PCB and connected with the auxiliary board micro control processor, the auxiliary board command sending module is connected with the auxiliary board command receiving module, the auxiliary board command receiving module is connected with an auxiliary board power module, the auxiliary board power module provides power for the auxiliary board PCB, the auxiliary board command sending module puts feedback information to the main control PCB, and the auxiliary board command receiving module receives action commands sent by the main control PCB.
Specifically, the master control command sending module comprises an MOS transistor Q1, a D pole of the MOS transistor Q1 is connected with the master control power supply module, an S pole is connected with the master control signal receiving module, and a G pole is connected with the master control micro control processor; the auxiliary board command receiving module comprises a triode Q3, a resistor R2, a resistor R3 and a resistor R5, the B pole of the triode Q3 is respectively connected with a resistor R2 and a resistor R5, the C pole of the triode Q3 is respectively connected with a resistor R3 and an auxiliary board micro-control processor, the E pole of the triode Q3 is respectively connected with the other end of the resistor R5 and the auxiliary board command sending module, the other end of the resistor R3 is connected with a power supply VCC, and the other end of the resistor R2 is respectively connected with the auxiliary board command sending module and the auxiliary board power supply module.
In this embodiment, the master control signal receiving module includes a diode D2 and a resistor R4, one end of the resistor R4 is connected to the power VCC, and the other end of the resistor R4 is connected to the master control micro-control processor and the slave board command transmitting module, respectively; the slave board command sending module comprises a resistor R1 and a triode Q2, the B pole of the triode Q2 is connected with a slave board micro-control processor, the C pole is connected with a resistor R1, the other end of the resistor R1 is connected with a main control micro-control processor, the E pole of the triode Q2 is grounded, in the practical application process, the main control micro-control processor selected in the embodiment is an eight-bit MCU processor, the specific model is not limited, the main control micro-control processor can be any eight-bit MCU processor, of course, any sixteen or thirty-two bit MCU can be used, the MOS pipe Q1 can be controlled to supply power to the device driving circuit, the MCU N76E003 of a new pond is taken as an example, the PIC 16E series can also be used, or any serial communication MCU such as the STM S series can be used, when the state of the slave board PCB needs to be changed or the working state is confirmed, the main control PCB controls the switch of the MOS pipe Q1 to enable the device driving circuit, that is, the sub-PCB receives the switch status, and after the switch status is received within the set time, the sub-PCB returns the self status to the main control PCB, and since the communication content is customized, the pin of the MCU can be the normal IO port or the TX port, the RX port, so that the whole circuit has a strong selectivity.
In an embodiment, the controlling the transmission signal of the main control PCB by the self-defined switch signal when the working state of the sub board PCB needs to be changed specifically includes: the master micro-control processor controls the switching state of the MOS transistor Q1 to complete the transmission of 0 or 1 digit.
Specifically, the main control power supply module in this embodiment includes stabiliser U2 and the electric capacity C2 of being connected with stabiliser U2, the power VCC is connected to electric capacity C2's one end, and electric capacity C2's other end ground connection, vice board power supply module includes stabiliser U1 and the electric capacity C1 of being connected with stabiliser U1, the power VCC is connected to electric capacity C1's one end, and electric capacity C1's other end ground connection, electric capacity C1's size has decided the time length that vice board PCB can normally work after main control PCB control switch signal closes, has also decided the size of data capacity that can communicate, and wherein, power VCC is input of battery package or DC power supply, also can accomplish this function by other integrated LDO or discrete component.
In a specific application process, when a peripheral action command of the master control micro-control processor is sent to the master control micro-control processor and corresponding work of the slave board micro-control processor is needed, the action command is sent through the master control command sending module, the on-off state of the MOS tube Q1 is controlled through the master control micro-control processor to complete 0/1 digital transmission, when the MOS tube Q1 is turned on, R2/R5 voltage division is performed, the triode Q3 is turned on, RX is pulled down, RX of the slave board micro-control processor is 0, after the MOS tube Q1 is turned off, R2/R5 voltage division is 0, the triode Q3 is not turned on, and RX is 1, so that data are sent from the master control micro-control processor to the slave board micro-control processor.
The main control power supply module is responsible for providing power for the main control PCB, the main control micro-control processor is responsible for processing communication and other functional actions of the main control PCB, processing of receiving and sending data and the like, and keeping normal work of the electric appliance, the signal receiving of the main control signal receiving module is required to be that when the MOS tube Q1 is closed, the main control PCB gives P < + > pull-up resistance through the power VCC, if the TX of the auxiliary board micro-control processor is low, the RX of the main control micro-control processor is high level which is 1, and when the TX of the auxiliary board micro-control processor is high level, the gasket of the RX of the main control micro-control processor is pulled down and is 0; other functions of the main control micro-control processor realize pin modules, and peripheral sub PCBs such as a display or a switch are connected to realize product actions, such as realization of other functional modules such as a starting key, a gear shifting position, a detection circuit and a display circuit; the auxiliary board micro control processor is used for receiving and executing the working command sent by the main control micro control processor, controlling the working content of the auxiliary board PCB, communicating with the main control micro control processor, and realizing the functional content of the auxiliary board PCB, such as the motor discharge detection circuit, overcurrent or some temperature and distance detection; the function can be accomplished by integrated LDO or discrete component to subplate micro control processor, be responsible for providing subplate micro control processor operating voltage VCC, in this embodiment, still be connected with diode D1 between subplate order receiving module and the subplate power module, diode D1 can guarantee the communication digitization and realize, make the accurate instruction of receiving that the master control PCB sent of subplate PCB and correctly send state information to master control PCB, and the size of electric capacity C1 has decided the time length that the subplate PCB can normally work after master control PCB control switch signal closes here, but also decided the data capacity size of can communicating.
In an embodiment, assuming that 2-bit numbers are defined not to include an initial bit and an end bit, the sending state may have 4 functional commands of 00, 01, 10, and 11, and in a device driving circuit, that is, in a sub-board PCB, a sending circuit may also be configured, and after the main control PCB circuit sends data, the working state of the current circuit is replied, and the working states of several PCBs may also be defined or some working information may be fed back.
According to the functional definition, some states can be defined: information such as normal operation 00, short circuit 01, overcurrent 10 and other faults 11, it should be noted that transmission in the user-defined state can be modulated while power is supplied to achieve the purpose of a transmission state, the transmission time is limited, the transmission can be used as required, communication can be omitted during normal operation, and when the information amount is larger, the processing time is prolonged, so that the stability of transmission needs to be ensured. According to the requirement, 3 bits, 4 bits or more bits can be configured, the higher the frequency is, the larger the transmittable information amount can be, and the greater the resolution requirement of the MCU is correspondingly, assuming that the transmission frequency is 8K for calculation, when half of data can be transmitted and received within 1ms, the data can be transmitted and received 3 bits of data, if the time is lengthened to 5ms, the corresponding 15-bit state can be communicated, the transmission and power supply requirements can not conflict with each other, and the function of controlling and collecting the PCB state information of the slave board is achieved.
In one embodiment, the following software setting definitions are included, with the subplate PCB as the motor control board:
defining one: the control MOS tube Q1 of the master control PCB sends T01R10, T01 represents starting the 1 st gear of the motor, R10 shows that the state recovered by the auxiliary PCB is the 1 st gear of the motor;
definition II: the control MOS tube Q1 of the master control PCB sends T11R11, T11 represents to start the 2 nd gear of the motor, R11 states that the state that the sub PCB returns is the 2 nd gear of the motor;
defining three: the control MOS tube Q1 of the master control PCB sends T00R00, T11 represents to start the motor shut-down gear, R00 shows that the state recovered by the auxiliary PCB is the motor shut-down gear;
defining four: the control MOS tube Q1 of the master control PCB sends T01R00, T01 indicates starting the 1 st gear of the motor, R00 indicates that the state recovered by the auxiliary PCB is normal discharge (R00 is defined as normal discharge), and in the same principle, R01 can be defined as abnormal discharge.
It should be noted that, here, only the case of only 2 bits is transmitted and received, there are 4 states for 2 bits, if 3 bits are put, there may be 8 states, if 4 bits are used, there may be 16 states, and there is no need for the same receiving bit of transmission, X bits may be transmitted, Y bits may be received, meanwhile, if the main control PCB needs to control a plurality of sub-board PCBs, its principle is consistent, the number is determined according to the actual use requirement, the main control PCB only communicates with each sub-board PCB, each sub-board PCB does not affect each other, and under the condition of not using sub-modules, the sub-modules may be completely turned off, so that it is completely power-saving, as shown in fig. 3, which is a schematic connection diagram of the main control PCB and two sub-board PCBs.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the spirit of the invention, which falls within the scope of the invention, and therefore the scope of the invention is to be determined by the appended claims.
Claims (6)
1. A control method for realizing real-time power supply and two-way communication by two wires comprises a main control PCB and a plurality of auxiliary PCBs, and is characterized in that the main control PCB and the auxiliary PCBs are respectively connected by P < + > and P < - > wires, and the control method comprises the following steps:
when the PCB works normally, the main control PCB realizes the power supply of the auxiliary PCB, and the auxiliary PCB carries out normal discharge and predefined work;
when the working state of the auxiliary PCB needs to be changed, the sending signal of the main control PCB is controlled through a self-defined switch signal, and after the corresponding auxiliary PCB receives the signal, the action which needs to be executed by the auxiliary PCB is determined according to a software self-defined protocol;
when the auxiliary PCB feeds back information to the main control PCB, after the main control PCB sends data for changing the working state, the auxiliary PCB sends a feedback signal to the main control PCB;
the main control PCB is provided with a main control micro-control processor, a main control signal receiving module and a main control command sending module, the main control signal receiving module is connected with the main control command sending module, and the main control command sending module is connected with a main control power supply module;
the auxiliary board PCB is provided with an auxiliary board micro control processor, an auxiliary board command receiving module and an auxiliary board command sending module, the auxiliary board command receiving module is connected with the auxiliary board micro control processor, and the auxiliary board command sending module is connected with an auxiliary board power supply module;
the master control command sending module comprises an MOS tube Q1, the D pole of the MOS tube Q1 is connected with the master control power supply module, the S pole is connected with the master control signal receiving module, and the G pole is connected with the master control micro control processor;
the auxiliary board command receiving module comprises a triode Q3, a resistor R2, a resistor R3 and a resistor R5, the B pole of the triode Q3 is respectively connected with a resistor R2 and a resistor R5, the C pole of the triode Q3 is respectively connected with a resistor R3 and an auxiliary board micro-control processor, the E pole of the triode Q3 is respectively connected with the other end of the resistor R5 and the auxiliary board command sending module, the other end of the resistor R3 is connected with a power supply VCC, and the other end of the resistor R2 is respectively connected with the auxiliary board command sending module and the auxiliary board power supply module.
2. The control method for realizing real-time power supply and bidirectional communication by two wires according to claim 1, wherein the step of controlling the transmission signal of the main control PCB by a self-defined switch signal when the working state of the sub-PCB needs to be changed specifically comprises the steps of:
the master micro-control processor controls the switching state of the MOS transistor Q1 to complete the transmission of 0 or 1 digit.
3. The control method for realizing real-time power supply and bidirectional communication by two wires according to claim 2, wherein: and a diode D1 is also connected between the slave board command receiving module and the slave board power supply module.
4. The control method for realizing real-time power supply and bidirectional communication by two wires according to claim 2, wherein: the auxiliary board power module comprises a voltage stabilizer U1 and a capacitor C1 connected with the voltage stabilizer U1, one end of the capacitor C1 is connected with a power supply VCC, and the other end of the capacitor C1 is grounded.
5. The control method for realizing real-time power supply and bidirectional communication by two wires according to claim 1, wherein: the master control command sending module is connected with a TX port or a common IO port of the master control micro control processor, and the master control signal receiving module is connected with an RX port or a common IO port of the master control micro control processor.
6. The control method for realizing real-time power supply and bidirectional communication by two wires according to claim 1 or 4, wherein: the power source VCC is a battery pack input or a dc power source input.
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| CN203190899U (en) * | 2012-12-12 | 2013-09-11 | 柳州长虹机器制造公司 | Non-polarity double-wire communication digital electronic detonator capable of automatically time-delaying |
| CN103904743B (en) * | 2014-03-28 | 2016-08-24 | 常州信息职业技术学院 | A kind of parasitic method of supplying power to and structure thereof |
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| CN106326174B (en) * | 2016-08-31 | 2019-01-29 | 宋红波 | A kind of two line telecommunication circuits |
| CN207896235U (en) * | 2018-03-21 | 2018-09-21 | 重庆美顺电子科技有限公司 | Multigroup lithium battery parallel connection manages system |
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