CN111930037A - Communication control system - Google Patents
Communication control system Download PDFInfo
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- CN111930037A CN111930037A CN202010737460.8A CN202010737460A CN111930037A CN 111930037 A CN111930037 A CN 111930037A CN 202010737460 A CN202010737460 A CN 202010737460A CN 111930037 A CN111930037 A CN 111930037A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
A communication control system comprises a main controller, a microprocessor, a signal line and an execution component, wherein the microprocessor comprises a communication module and a control module; the main controller sends out a control signal, the control signal is transmitted to the communication module through a signal line, the control signal passes through the communication module, the control module collects the control signal, and the control signal passes through the control module which sends the control signal to the motor; the control module collects feedback signals at intervals of a certain time, the feedback signals pass through the control module and the communication module and are transmitted to the signal line, the main controller collects the feedback signals, and the main controller sends corresponding control signals according to the feedback signals; the system thus reduces the number of interface ends and is simpler to construct.
Description
This application is a divisional application for patent application No. 201611009708.9.
[ technical field ] A method for producing a semiconductor device
The present invention relates to a communication system, and more particularly, to a communication control system.
[ background of the invention ]
At present, an electric pump is mainly applied to a refrigeration cycle of a vehicle, the operation of the electric pump is realized through a control system of the electric pump, the electric pump comprises a motor and a rotor, the motor drives the rotor to rotate, and the motor control system controls the motor to rotate; the control system of the electric pump comprises a main controller, a micro controller and communication control, wherein the main controller sends a control command to the microprocessor through the communication system, the microprocessor analyzes the control command and controls the motor to rotate, and meanwhile, the microprocessor feeds back the running state of the electric pump to the main controller through communication.
Generally, the master controller is a controller of a vehicle, the microprocessor is integrated on an electric control board of the electric pump, control information and feedback information are transmitted between the master controller and the microprocessor through a communication system, the communication system forms a communication protocol between the master controller and the microprocessor, and in order to prevent signals from interfering with each other, the control information and the feedback information are transmitted through a signal line respectively, so that the connection of the control system is relatively complex.
Therefore, there is a need for improvement of the prior art to solve the above technical problems.
[ summary of the invention ]
The invention aims to provide a communication control system, which enables the system to be simple in connection and accurate in control.
In order to achieve the purpose, the invention adopts the following technical scheme: a communication control system comprises a main controller, a microprocessor, a signal line and an execution part, wherein the main controller comprises a first communication module and a first control module, the microprocessor comprises a second communication module and a second control module, the main controller is connected with the microprocessor through the signal line, and the control module of the microprocessor is connected with the execution part; the executive component comprises a motor and a driven element, the main controller sends out a control signal, the control signal is transmitted to the second communication module through the signal line, the control signal forms a first control signal through the second communication module, the second control module collects the first control signal, the first control signal forms a second control signal through the second control module, the second control module sends the second control signal to the executive element, and the executive element is driven to operate; and meanwhile, the second control module collects a first feedback signal representing the running state of the execution component at a certain time interval, the first feedback signal passes through the second control module to form a second feedback signal, the second feedback signal passes through the second communication module to form a third feedback signal and is transmitted to the signal line, the master controller collects the third feedback signal, and the master controller sends out the corresponding control signal according to the third feedback signal.
Compared with the prior art, the main controller and the microprocessor are connected through a single signal line, the microprocessor comprises the communication module and the control module, the main controller sends the control signal to the communication module through the signal line, the control module collects feedback information and sends the feedback information to the signal line through the communication module, and the main controller collects the feedback information on the signal line.
[ description of the drawings ]
FIG. 1 is a system block diagram of a communication control system;
FIG. 2 is a block diagram of the communication between the master and the microcontroller of FIG. 1;
FIG. 3 is a block diagram of the main controller and the microprocessor of FIG. 1 communicating via a communication circuit;
FIG. 4 is a first embodiment of a connection configuration of the communication circuit diagram of FIG. 3;
FIG. 5 is a second embodiment of a connection configuration of the communication circuit diagram of FIG. 3;
FIG. 6 is a communication flow diagram of the communication control system;
FIG. 7 is a flow chart illustrating the transmit mode of FIG. 6;
fig. 8 is a flowchart illustrating the feedback mode in fig. 6.
[ detailed description ] embodiments
The invention will be further described with reference to the following figures and specific examples:
the electric pump in the embodiment is applied to the automobile thermal management system, the electric pump comprises a motor and a rotor, the motor drives the rotor to rotate, and the electric pump runs under the action of the control system. The control system comprises a main controller ECU, a microprocessor MCU and a signal line BUS, wherein the main controller ECU comprises a first communication module and a first control module, the microprocessor MCU comprises a second communication module and a second control module, the first communication module of the main controller ECU is connected with the second communication module of the microprocessor MCU through the signal line, and the control system controls the operation of the electric pump by controlling the operation of the motor; meanwhile, a second control module of the microprocessor acquires the running state of the electric pump and feeds the running state back to the main controller ECU through a second communication module. The actuator in this embodiment is an electric pump in which the driven element is a rotor; of course, the actuating component may also be an electronic expansion valve, an electronic water valve, or other electronic components including a motor and a driven element.
Referring to fig. 1, a main controller ECU sends a control signal, the control signal is transmitted to a second communication module of a microprocessor MCU through a signal line BUS, the control signal passes through the second communication module to form a first control signal, the second control module collects the first control signal, the second control module analyzes the first control signal to obtain rotation speed information and generate a second control signal, and the second control module sends the second control signal to a motor and drives the motor to rotate so as to control a moving element to rotate; meanwhile, the second control module collects a first feedback signal reflecting the current running state of the electric pump, the first feedback signal generates a second feedback signal through the second control module, the second feedback signal forms a third feedback signal through the second communication module and is transmitted to the signal line BUS, the main controller ECU collects the third feedback signal, and the main controller ECU judges the real-time running state of the execution part according to the third feedback signal and sends a corresponding control signal. Therefore, signal sending and feedback are completed between the microcontroller MCU and the main controller ECU through the single signal line BUS, interface ends are reduced in the system, the structure is simpler, a feedback system is arranged, and the main controller controls the execution part more timely and accurately.
Referring to fig. 2, the first control module includes a first storage module 3, the first storage module 3 prestores a plurality of groups of combination lists of durations of control signals representing the operation states of the execution components and durations of low level signals, the third feedback signal is a combination of a duration of a current control signal and a duration of a low level signal, and the main controller ECU determines the operation state of the current execution component according to the fact that one of the combinations of the third feedback signal and the combination list prestored in the first storage module 3 is the same. Therefore, the combination of the duration of the control signal and the duration of the low-level signal is used as the third feedback signal, and the universality and the portability of the second communication module are improved.
In this embodiment, the second control module collects the first feedback signal, and determines an operation state of the moving element, where the operation state includes a normal state and an event state, the normal state refers to a state where the execution component operates according to the control signal sent by the main controller ECU, the event state refers to a state where the execution component does not operate according to the control signal sent by the main controller ECU, the second control module includes a second storage module 4, the second storage module 4 prestores the operation state, the second control module collects the first feedback signal of the current motion state, the current motion state is the same as one of the prestored motion states, and determines that the operation state of the current execution component is a corresponding operation state and generates a second feedback signal including event information. The first feedback signal comprises the running current of the motor, the microprocessor MCU collects the running current, the microprocessor MCU judges the running state of the execution component according to the running current, and the running state of the execution component monitored at the moment comprises an overcurrent state, a locked rotor state, a dry rotor state and other event states. The first feedback signal further comprises voltage values of three phases of the motor, the microprocessor MCU collects the voltage values of the three phases of the motor, and whether the execution component is in an overvoltage state or an undervoltage state or other event states is monitored. The first feedback signal also comprises an NTC thermistor voltage value, and the microprocessor MCU collects the NTC thermistor voltage value and monitors whether the execution component is in an event state such as an over-temperature state. The second control module diagnoses the current state of the electric pump through the collected feedback information to form a second feedback signal, the second feedback signal is used for generating a third feedback signal through the second communication module, and the main controller ECU collects the third feedback signal. And the main controller ECU sends out a corresponding control signal through a third feedback signal so as to adjust the running state of the execution component.
The third feedback signal represents the operating state of the actuator primarily in the form of a combination of the duration of the current control signal on the signal line BUS and the duration of the low level signal. Such as: when the third feedback signal is a combination of the control signal with the duration of 4.5s and the pull-down level signal with the duration of 0.5s, the normal state is defined; when the third feedback signal is a combination of the control signal with the duration of 1.5s and the pull-down level signal with the duration of 1s, the locked-rotor state is defined; when the third feedback signal is a combination of the control signal with the duration of 1s and the pull-down level signal with the duration of 1s, a dry-running state is defined; when the third feedback signal is a combination of the duration time of the control signal being 2s and the duration time of the pull-down level signal being 1s, defining an over-temperature state; when the third feedback signal is a combination of the control signal with the duration of 3s and the pull-down level signal with the duration of 1s, defining the combination as an overcurrent state; when the third feedback signal is a combination of the control signal with the duration of 2.5s and the pull-down level signal with the duration of 1s, an under-voltage or over-voltage state is defined.
Referring to fig. 3, the main controller ECU includes an output unit 1 and an input unit 2, a control signal output by the main controller ECU is output through the output unit 1, the output control signal is transmitted to the signal line BUS, and a feedback signal on the signal line BUS is collected through the input unit 2.
The output unit 1 comprises an output interface 11 and an output circuit, the input unit 2 comprises an input interface 22 and an input circuit, the output circuit comprises a first triode Q1, the base electrode of the first triode Q1 is a control signal input electrode, the emitter electrode of the first triode Q1 is grounded through a first resistor R1, and the collector electrode of the first triode is connected with the output interface 11, so that the input circuit is favorable for improving the driving capability of a control signal; the input circuit comprises a second triode Q2, the base of the second triode Q2 is connected with the input interface, the main controller ECU acquires a feedback signal through the input interface, the emitter of the second triode Q2 is grounded, the collector of the second triode Q2 is connected with the power supply through a second resistor R2, and the second resistor R2 arranged in this way is beneficial to boosting the voltage of the collector of the second triode Q2.
Referring to fig. 2, the second communication module includes a transmission system and a feedback system. The sending system comprises a signal identification module 5 and a signal storage module 9; the feedback system comprises an event adding module 6 and an event pre-storing module 7.
The signal identification module 5 receives the control signal from the signal line and identifies whether the received control signal is a signal of a PWM waveform; if the control signal is not a signal of a PWM waveform and is an abnormal signal, the abnormal signal is assigned, the feedback system does not work at the moment, and the second communication module generates a first control signal for driving the motor to run at the maximum rotating speed; if the control signal is a signal with a PWM waveform, the signal identification module 5 analyzes the control signal, the signal identification module 5 analyzes the duty ratio and the frequency of the control signal, the duty ratio refers to the time ratio of the high level of the control signal in one period, the frequency refers to the number of times of the control signal completing periodic change in unit time, and meanwhile, whether the duty ratio and the frequency of the control signal are correct or not is detected; if the duty cycle and the frequency of the PWM signal are correct, the control signal is stored in the signal storage block 9 for extraction by the controller.
The incorrect duty cycle comprises a duty cycle of 0, a duty cycle of 100% and a duty cycle error, wherein the duty cycle of 0 means that a signal of a signal line is always in a low level state, the duty cycle of 100% means a high level state, the duty cycle error comprises 6 continuous control signals passing through the second communication module, the maximum value of the duty cycle minus the minimum value of the duty cycle is greater than 1%, the process duration is greater than or equal to 2 seconds, or the maximum value of the duty cycle minus the minimum value of the duty cycle is greater than 1% in the 6 continuous control signals passing through the second communication module, and the process duration is greater than 1 second and less than or equal to 2 seconds; the duty ratio is 0, the duty ratio is 100%, the minimum value of the maximum value minus the duty ratio of the duty ratio is larger than 1%, the duration time of the process is larger than or equal to 2 seconds, the control signal is an abnormal signal at the moment, the abnormal signal is assigned, the feedback system does not work at the moment, the second communication module generates a first control signal for driving the motor to operate at the maximum rotating speed, and the first control signal is stored in the signal storage module 9 for extraction of the second control module. In the continuous 6 control signals passing through the second communication module, when the maximum value of the duty ratio minus the minimum value of the duty ratio is more than 1% and the duration of the process is more than 1 second and less than or equal to 2 seconds, the control signal is an abnormal signal at the moment, the abnormal signal is assigned, the feedback system does not work at the moment, the second communication module generates a first control signal for driving the motor to run at the original speed, and the first control signal is stored in the signal storage module 9 for being extracted by the second control module.
The incorrect frequency refers to 6 continuous control signals passing through the second communication module, when the ratio of the difference value of the maximum value of the control frequency minus the minimum value of the frequency to the maximum value is more than 1%, and the duration of the process is more than or equal to 2 seconds. If the frequency of the control signal is incorrect, the control signal is an abnormal signal at the moment, the abnormal signal is assigned, the feedback system does not work at the moment, the second communication module generates a first control signal for driving the motor to run at the maximum rotating speed, and the first control signal is stored in the signal storage module 9 for being extracted by the second control module.
The feedback system comprises an event adding module 6 and an event storage module 7; the event adding module 6 is used for adding event information, the added event information forms an event list and is stored in the event storage module 7, and thus the event list is prestored in the event storage module 7; the event operation module 8 receives the second feedback signal and extracts current event information included in the second feedback signal, and when the current event information is the same as one of the event information of the event list, the corresponding event information is activated or turned off and a corresponding third feedback signal is generated.
The event information comprises an event number, a priority, an enable bit, the least number of reporting times, the duration of a control signal and the duration of a pull voltage; the event number refers to a number of an operating state of the execution unit represented by the second feedback signal, such as: the number of the normal state is 1, the number of the locked rotor state is 2, the number of the dry rotor state is 3, the number of the overvoltage state is 4, the number of the undervoltage state is 5, and the like. The priority level refers to that when a plurality of second feedback signals occur simultaneously, the second feedback signal with the highest priority level generates a third feedback signal firstly, and when the enable bit refers to the enable position 1 of the corresponding event information, the corresponding event information is excited; when the corresponding event information enables position 0, the corresponding event information is turned off. The minimum reporting times are times for generating a third feedback signal and sending the third feedback signal to a signal line when a second feedback signal is generated. The control signal duration refers to the duration of the control signal on the signal line in the feedback system. The duration of the pull-up voltage refers to the duration of the low voltage on the signal line in the feedback system.
In this embodiment, the second communication module includes a communication circuit, the communication circuit includes a sending unit, a feedback unit, and a connection unit, and the sending unit includes a wide voltage input module. The connection unit comprises a first connection end 11, a second connection end 12 and a third connection end 13, the first connection end 11 is connected with the main control ECU, and the second connection end 12 and the third connection end 13 are connected with the microprocessor MCU; the wide voltage input module is arranged close to the first connection end 11
The control signal enters the communication circuit through the wide voltage input module, so that when the input voltage is 0-2.5V, the voltage passing through the wide voltage input module is 0V, and the influence of voltage fluctuation on the PWM signal is favorably filtered.
FIG. 4 is a schematic diagram of a first embodiment of a communication circuit; the transmitting unit comprises a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a third triode Q3, the wide voltage input module comprises a third resistor R3 and a fourth resistor R4 which are arranged in series, and the wide voltage input function is realized by setting the resistance values of the third resistor R3 and the fourth resistor R4; the signal line BUS is connected with the first connecting end 11, a control signal is divided by the third resistor R3 and the fourth resistor R4, the fifth resistor R5 limits the current to the base electrode of the third triode Q3, and the first control signal is output to the PWM pin of the microprocessor MCU from the second connecting end 12 by controlling the conduction or the disconnection of the third triode Q3. The transmitting unit further comprises a sixth resistor R6, the sixth resistor R6 is a pull-up resistor at the collector of the third transistor Q3, and the power VCC supplies power to the third transistor Q3 through the sixth resistor R6.
The function process of the third resistor R3 and the fourth resistor R4 forming the wide voltage input module is as follows: when the control signal is at a low level, the low level is within a range of 0-2V, the voltage is divided to the base electrode of the third triode Q3 through the third resistor R3 and the fourth resistor R4, and the voltage divided to the base electrode of the third triode Q3 is set to be smaller than the conduction voltage VBE of the third triode Q3, so that the third triode Q3 is in a cut-off state, and the collector output end of the third triode Q3 is at a high level, and the function of inputting the control signal into a low-level wide-voltage is realized.
The working process of the sending unit is as follows: when the control signal is at a high level, the high level is within a range of 7V-20V, the voltage is divided to the base of the third triode Q3 through the third resistor R3 and the fourth resistor R4, the voltage of the base of the third triode Q3 is greater than the conduction voltage VBE of the third triode Q3, the third triode Q3 is conducted, and the collector output end of the third triode Q3 is at a low level, so that the first control signal is output, wherein the low level of the first control signal is 0, and the high level of the first control signal is VBAT.
The communication circuit further comprises a seventh resistor R7 and a diode D1, the seventh resistor R7 is a pull-up resistor of the output interface of the master ECU, and the diode D1 is used for preventing the feedback signal from being output to the power supply and affecting the level of the signal on the bus.
The second interface I/O of the microprocessor MCU is connected to the third connection terminal 13 of the communication circuit, and sends the second feedback signal to the third connection terminal 13, the feedback unit includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and a fourth transistor Q4, wherein the eighth resistor R8 is a current-limiting resistor, the ninth resistor R9 is a pull-down resistor at the base of the fourth transistor Q4, the tenth resistor R10 is a pull-up resistor at the collector of the fourth transistor Q4, and the power VCC supplies power to the fourth transistor Q4 through the tenth resistor R10.
The working process of the feedback unit is as follows: when the second feedback signal is at a high level, the fourth transistor Q4 is turned on, and the signal output to the signal line BUS is at a low level, and when the second feedback signal is at a low level, the fourth transistor Q4 is turned off, and the signal output to the BUS is at a high level.
Fig. 5 is a second embodiment of the connection structure of the communication circuit diagram, the feedback unit being the same as compared with the first embodiment; the sending unit comprises a comparator 10, an eleventh resistor R11, a twelfth resistor R12 and a thirteenth resistor R13, wherein the comparator 10 comprises a positive port + and a negative port-, the twelfth resistor R12 and the thirteenth resistor R13 are divider resistors to form an input reference voltage Vi, the twelfth resistor R12 is connected with the positive port +, namely the input reference voltage Vi is connected with the positive port +, a control signal is connected with the negative port-of the comparator through the eleventh resistor R11, the eleventh resistor R11 is a current-limiting resistor, when the input control signal is higher than the input reference voltage Vi, the comparator outputs a low level, and when the input control signal is lower than the input reference voltage Vi, the comparator outputs a high level. When the value of the input reference voltage Vi is set to 2.5V, a wide voltage range of 0-2.5V can be achieved.
Referring to fig. 6 to 8, the communication method of the communication system includes a step of powering up the communication system, where the master controller sends a PWM waveform control signal with a duty ratio, where the duty ratio represents a target rotation speed of an actuator, and the microprocessor receives the control signal and analyzes the control signal to generate a driving signal, where the driving signal drives the actuator to move; the communication method further comprises an event processing step, wherein an event list is prestored in the event processing step and comprises a plurality of groups of event information representing event states, the event information in the event list is activated or closed through a preset program, the microprocessor acquires the current running state of an execution element at intervals of a certain time, and when the current running state is the same as the event state corresponding to the event information in the event list, the microprocessor activates or closes the event information in the event list according to the event processing step and feeds back the event information to the master controller.
The event information comprises an event number, event feedback information and an event enabling bit; each event number corresponds to an operating state of the execution component; the event feedback information comprises a group of high-low voltage combinations which are correspondingly generated and fed back to the master controller; the event information is activated when the position 1 is enabled; when the position 0 is enabled, the event information is turned off.
The event information also comprises event priority and event feedback times; when the microprocessor simultaneously acquires a plurality of current running states of the execution elements, the event information with high priority is fed back to the master controller before the event information with low priority, and the event feedback times refer to the minimum times for feeding back the event information to the master controller.
The communication method further comprises: the method comprises a communication system initialization step, wherein the communication system initialization step comprises hardware initialization, software initialization, event information addition and event list formation, the initialization step is arranged after the communication system power-on step, and the event information addition step is arranged after the software initialization is finished.
The communication method further comprises a state machine processing step, wherein the state machine processing step is arranged after the main controller sends out the control signal, and the state machine processing step is used for collecting the control signal at intervals of a certain time length to judge the state of the control signal and starting different operation modes.
The operation modes comprise a normal operation mode, an error closing mode and an error operation mode, and in the normal operation mode, the microprocessor drives the execution element to operate according to a driving signal of a target rotating speed; in the error operation mode, the microprocessor generates a driving signal for driving the execution element to operate according to the maximum rotating speed; and under the error closing mode, the microprocessor stops inputting the driving signal to the execution element, so that the execution element operates according to the original operation state.
The state of the control signal comprises that the control signal has a correct duty cycle and frequency, the duty cycle of the control signal is incorrect and/or the frequency of the control signal is incorrect, wherein when the control signal has a correct duty cycle and frequency, the state machine processing step starts a normal operation mode, and when the duty cycle of the control signal is incorrect and/or the frequency of the control signal is incorrect, the state machine processing step starts the error shutdown mode or the error operation mode.
Wherein the incorrect duty cycle comprises a duty cycle of 0 and a duty cycle of 100%, at which point the state machine processing step initiates an error mode of operation; the incorrect duty cycle further comprises a duty cycle error, the duty cycle error comprises a control signal of continuous 6 PWM waveforms passing through the microprocessor, the maximum value of the duty cycle minus the minimum value of the duty cycle is greater than 1%, and the process duration is greater than or equal to 2 seconds, at which time the state machine processing step starts an error operation mode; the duty cycle error further comprises that in the control signals of the continuous 6 PWM waveforms passing through the microprocessor, the maximum value of the duty cycle minus the minimum value of the duty cycle is greater than 1%, and the process duration is greater than 1 second and less than 2 seconds, at which point the state machine processing step initiates the error shutdown mode.
Said incorrect frequency being included in said control signal of 6 consecutive PWM waveforms passing through said microprocessor, the ratio of the difference of the maximum value of said frequency minus the minimum value of the frequency to the maximum value of said frequency being greater than 1% and the duration of the process being greater than or equal to 2 seconds, at which point said state machine processing step initiates said error mode of operation; the incorrect frequency further comprises that in the control signals of the continuous 6 PWM waveforms passing through the second communication module, the ratio of the difference value obtained by subtracting the minimum value of the frequency from the maximum value of the frequency to the maximum value of the frequency is more than 1%, and the duration of the process is more than 1 second and less than 2 seconds, at which time the state machine processing step starts the error closing mode.
It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A communication control system comprises a main controller, a microprocessor, a signal line and an execution part, wherein the main controller comprises a first communication module and a first control module, the microprocessor comprises a second communication module and a second control module, the main controller is connected with the microprocessor through the signal line, and the control module of the microprocessor is connected with the execution part; the main controller sends a control signal, the control signal is transmitted to the second communication module through the signal line, the control signal forms a first control signal through the second communication module, the second control module collects the first control signal, the first control signal forms a second control signal through the second control module, the second control module sends the second control signal to the executive element, and the executive element is driven to run; and meanwhile, the second control module collects a first feedback signal representing the running state of the execution component at a certain time interval, the first feedback signal passes through the second control module to form a second feedback signal, the second feedback signal passes through the second communication module to form a third feedback signal and is transmitted to the signal line, the master controller collects the third feedback signal, and the master controller sends out the corresponding control signal according to the third feedback signal.
2. The communication control system according to claim 1, wherein: the first control module comprises a first storage module, a first combination list is prestored in the first storage module, the first combination list comprises a plurality of groups of combinations of the duration of the control signals and the duration of the low level signals, and the main controller determines the control signals to be sent according to the fact that the third feedback signals are the same as one of the combinations of the duration of the control signals and the duration of the low level signals in the first combination list.
3. The communication control system according to claim 2, wherein: the operation state of the execution component comprises a normal state and an event state, the normal state refers to a state in which the execution component operates according to the control signal sent by the main controller, the event state refers to a state in which the execution component does not operate according to the control signal sent by the main controller, the second control module comprises a second storage module, an operation state list is prestored in the second storage module, the second control module collects the current motion state, the current motion state is the same as one of prestored motion states, the prestored operation state corresponding to the current motion state is judged, and current event information is generated corresponding to the prestored operation state.
4. The communication control system according to claim 3, wherein: the event states comprise a locked rotor state, a dry rotor state, an over-temperature state, an overvoltage state and an under-voltage state, the locked rotor state and the dry rotor state are judged by collecting the running current of the motor or the voltage values of the three phases of the motor, and at the moment, the first feedback signal is the running current of the motor and the voltage values of the three phases of the motor; the over-temperature state is judged by a temperature sensor, and the first feedback signal is a sensor signal; the overvoltage and undervoltage states are monitored by collecting voltage values of three phases of the motor, and at the moment, the first feedback signal is the voltage value of the three phases of the motor.
5. The communication control system according to claim 3, wherein: the second communication module comprises an event adding module and an event storage module, wherein the event adding module is used for adding event information to form an event list, and the added event list is stored in the event storage module; the second communication module receives the second feedback signal and extracts the current event information included in the second feedback signal, and when the current event information is the same as one of the event information of the event storage module, the second communication module activates or closes the corresponding event information and generates a corresponding third feedback signal.
6. The communication control system according to claim 5, wherein: the event information of the event storage module comprises a pull-down voltage duration and an enable bit, wherein the pull-down voltage duration is the duration of a low level signal in the combination of the duration of the current control signal and the duration of the low level signal; the event information is fired when the position 1 is enabled; when the position 0 is enabled, the event information is turned off.
7. The communication control system according to claim 6, wherein: the event information also comprises an event number and priority; the event number refers to the running state of the current execution component; the priority is that when the current operation state of the execution component has a plurality of corresponding event information, the event information with the highest priority first generates the third feedback signal.
8. The communication control system according to claim 2, wherein: the second communication module further comprises a signal identification module, and the signal identification module is used for receiving the control signal and identifying whether the received control signal is a signal of a PWM waveform composed of high and low levels.
9. The communication control system according to claim 8, wherein: the signal identification module is also used for judging whether the duty ratio and the frequency of the control signal are correct or not; when the duty cycle and the frequency are both correct, the control signal forms the first control signal in accordance with the control signal through a second communication module; when the duty ratio and the frequency are incorrect, the control signal is an abnormal signal, the feedback system does not work at the moment, and the second communication module drives the motor to run at the maximum rotating speed or run at the original speed through the second control module.
10. The communication control system according to claim 9, wherein: the incorrect duty ratio comprises a duty ratio of 0, a duty ratio of 100% and a duty ratio error, the duty ratio error comprises control signals of continuous 6 PWM waveforms passing through the second communication module, the maximum value minus the minimum value of the duty ratio is more than 1%, the duration of the process is more than or equal to 2 seconds, the feedback system does not work at the moment, and the second communication module drives the motor to operate at the maximum rotating speed through the second control module; the duty ratio error also comprises that in control signals of continuous 6 PWM waveforms passing through a second communication module, the maximum value of the duty ratio minus the minimum value of the duty ratio is more than 1%, the duration of the process is more than 1 second and less than 2 seconds, a feedback system does not work at the moment, and the second communication module drives the motor to operate at the original speed through the second control module;
the incorrect frequency is included in the control signals of continuous 6 PWM waveforms passing through the second communication module, the ratio of the difference value obtained by subtracting the minimum value of the frequency from the maximum value of the frequency to the maximum value of the frequency is more than 1%, the duration time of the process is more than or equal to 2 seconds, the feedback system does not work at the moment, and the second communication module drives the motor to operate at the maximum rotating speed through the second control module; the incorrect frequency also comprises that in control signals of continuous 6 PWM waveforms passing through a second communication module, the ratio of the difference value obtained by subtracting the minimum value of the frequency from the maximum value of the frequency to the maximum value of the frequency is more than 1%, the duration of the process is more than 1 second and less than 2 seconds, at this time, a feedback system does not work, and the second communication module drives the motor to operate at the original speed through the second control module.
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