A practical electronic control system for the life detection of electric suction automotive door locks

Abstract

The present invention provides a practical electric control system for life detection of an electric suction automotive door lock, including: an external force upper half-lock unit, a PWM output module, a PLC, a single-chip microcomputer, and a power supply module. The external force upper half-lock unit is used to lock the upper half of the door lock. The PWM output module is connected to the door lock and is used to control the operation of the door lock motor. The PLC is connected to the door lock and is used to detect the door lock signal, count the number of door lock detections, and give an alarm according to the door lock signal. The single-chip microcomputer is connected to the external force upper half-lock unit, the PWM output module, and the door lock, and is used to control the external force upper half-lock unit to lock the upper half of the door lock and send out a PWM signal for controlling the door lock action. The power supply module includes a first power supply and a second power supply. The first power supply is used to supply power to the single-chip microcomputer and the PLC, and the second power supply is used to supply power to the PWM output module and the door lock. When the present invention conducts a durability performance test on the door lock, it can simulate the actual working conditions of the door lock in the whole vehicle and the test results are reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile door lock testing, and particularly relates to a practical electronic control system for the life detection of an electric suction automobile door lock. Background Art

[0002] With the rapid development of the automobile industry and the innovation of some new technologies, the automobile has been continuously improving its technology to make the automobile more intelligent and electrified. The automobile door lock is an important part of the automobile body and has also experienced a process from simple to intelligent.

[0003] In view of this, the automatic suction function of the automobile door is also increasingly concerned and loved by the majority of users and major vehicle manufacturers. As the locking mechanism of the automobile door, the reliability of the self-suction door lock is directly related to the locking effect of the automobile door and driving safety. Therefore, various working conditions need to be comprehensively considered, and the durability of the self-suction door lock needs to be tested and evaluated from the whole vehicle service life cycle. In the prior art, vehicle production enterprises generally evaluate the whole vehicle through comprehensive durability tests of 30,000 kilometers or 50,000 kilometers. However, the working environment of the self-suction door lock is relatively single and the working frequency is also low, so the reliability of the self-suction door lock cannot be effectively tested. At present, although domestic door lock production enterprises also conduct durability tests on door locks, they do not fully consider the actual working conditions of the door locks, and the working conditions are too ideal. Most of them use a DC stable voltage to conduct durability tests on each action of the self-suction tail door lock. There is a large difference between the test process and the working conditions during actual vehicle driving. Therefore, it will affect the reliability of the test results. And currently, the power supplies used for the function detection and life durability of automobile door locks in the laboratory are all DC power supplies, while the power supply used in the automobile system is a PWM pulse power supply. Therefore, the current test equipment cannot meet the test requirements. Summary of the Invention

[0004] The present invention is made to solve the above problems, and aims to provide a practical electronic control system for the life detection of an electric suction automobile door lock that can simulate the actual working conditions of the door lock in the whole vehicle and has reliable test results when conducting durability performance tests on the door lock.

[0005] The present invention provides a practical electronic control system for the life detection of an electric suction automobile door lock, which is characterized by comprising:

[0006] An external force upper lock unit for locking the upper half of the door lock;

[0007] A PWM output module connected to the door lock for controlling the operation of the door lock;

[0008] A PLC connected to the door lock for detecting door lock signals, counting the number of door lock detections, and alarming according to the door lock signals;

[0009] A single-chip microcomputer is connected to the external upper half-lock unit, the PWM output module, and the door lock. The single-chip microcomputer is used to control the external upper half-lock unit to half-lock the door lock, receive the door lock signal fed back by the door lock, and send PWM signals for controlling the door lock to engage, engage and reset, unlock, and unlock and reset to the PWM output module according to the received door lock signal; and

[0010] A power supply module includes a first power supply and a second power supply. The first power supply is connected to the single-chip microcomputer and the PLC, and is used to supply power to the single-chip microcomputer and the PLC. The second power supply is connected to the PWM output module and is used to supply power to the PWM output module.

[0011] Furthermore, in the practical electronic control system for detecting the lifespan of an electric-suction car door lock provided by the present invention, it can also have the following feature: An optocoupler is connected between the door lock and the PLC, and the optocoupler is used to convert the door lock signal of the door lock and then send it to the PLC.

[0012] Furthermore, in the practical electronic control system for detecting the lifespan of an electric-suction car door lock provided by the present invention, it can also have the following feature: A touch screen is connected to the PLC and is used to display monitoring information, the number of detections, and alarm records.

[0013] Furthermore, in the practical electronic control system for detecting the lifespan of an electric-suction car door lock provided by the present invention, it can also have the following feature: A buck module is connected between the first power supply and the single-chip microcomputer.

[0014] Furthermore, in the practical electronic control system for detecting the lifespan of an electric-suction car door lock provided by the present invention, it can also have the following feature: The external upper half-lock unit includes: a relay connected to the single-chip microcomputer, a solenoid valve connected to the relay, and a cylinder connected to the solenoid valve. The cylinder can push the door lock to be half-locked.

[0015] Furthermore, in the practical electronic control system for detecting the lifespan of an electric-suction car door lock provided by the present invention, it can also have the following feature: The external upper half-lock unit further includes: a counter, the counter is connected to the relay, and the counter is used to record the number of times the single-chip microcomputer controls the relay to be turned on.

[0016] Furthermore, in the practical electronic control system for detecting the lifespan of an electric-suction car door lock provided by the present invention, it can also have the following feature: The PWM output module is an H-bridge, and both the first power supply and the second power supply are DC regulated power supplies.

[0017] Further, in the practical electronic control system for detecting the service life of an electric suction automotive door lock provided by the present invention, it may also have the following feature: The PWM signal includes IN1, IN2, and the PWM duty cycle, and the operation of the door lock is controlled by setting the values of IN1, IN2, and the PWM duty cycle.

[0018] Further, in the practical electronic control system for detecting the service life of an electric suction automotive door lock provided by the present invention, it may also have the following feature: The door lock signal includes a latch signal S1, a middle position signal S2, and a pawl signal S3.

[0019] It is judged whether to alarm according to the running time of the four stages of the door lock suction, suction reset, unlocking, and unlocking reset. If the running time of any stage exceeds the set threshold, the PLC alarms.

[0020] When counting the number of door lock detections, it is counted according to the number of cycles of the latch signal.

[0021] Further, in the practical electronic control system for detecting the service life of an electric suction automotive door lock provided by the present invention, it may also have the following feature: The method for determining whether to alarm during the operation of the four stages is as follows:

[0022] Alarm for suction failure: Timing starts when the latch signal flips from S1 = 1 to S1 = 0 and ends when the pawl signal flips from S3 = 1 to S3 = 0. If the timing time is greater than 2500 ms, the door lock suction fails, the PLC alarms and records it; otherwise, there is no alarm.

[0023] Alarm for suction reset failure: Timing starts when the pawl signal flips from S3 = 1 to S3 = 0 and ends when the middle position signal flips from S2 = 1 to S2 = 0. If the timing time is greater than 3200 ms, the door lock suction fails, the PLC alarms and records it; otherwise, there is no alarm.

[0024] Alarm for unlocking failure: Timing starts when the middle position signal flips from S2 = 0 to S2 = 1 and S1 = 0, and ends when the pawl signal flips from S3 = 0 to S3 = 1. If the timing time is greater than 1000 ms, the door lock unlocking fails, the PLC alarms and records it; otherwise, there is no alarm.

[0025] Alarm for unlocking reset failure: Timing starts when the pawl signal flips from S3 = 0 to S3 = 1 and ends when the middle position signal flips from S2 = 1 to S2 = 0. If the timing time is greater than 1700 ms, the door lock unlocking reset fails, the PLC alarms and records it; otherwise, there is no alarm.

[0026] The method for counting the detection times is as follows: One cycle is when the latch signal flips from S1 = 1 to S1 = 0 and then flips back to S1 = 1, and the count is 1 time. Each time a cycle is completed, the count is incremented by 1.

[0027] The present invention has the following advantages:

[0028] The practical electronic control system for detecting the service life of an electric suction automotive door lock of the present invention can simulate items such as the suction action, unlocking action, and timeout alarm of the self - suction tail door lock under the control of an automotive ECU, and uses a single - chip microcomputer to control the PWM output module to supply power to the door lock, thereby providing a variable pulsed voltage to the door lock. The simulation process is the same as the actual working condition of the door lock in the whole vehicle, the test result is reliable, the use cost is low, and the experimental efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the structural block diagram of the practical electronic control system for detecting the service life of an electric suction automotive door lock in the present invention;

[0030] Figure 2 is the simple wiring diagram of the practical electronic control system for detecting the service life of an electric suction automotive door lock in the present invention.

[0031] Figure 2 In, 1, 19, 24 are the middle - position signal lines, 2, 20, 23 are the lock - tongue signal lines, 3, 21, 25 are the pawl signal lines, 6, 22 are the common terminals, 4 is the power input signal +, 5 is the power output signal -, 7, 8, 9 are the relay signal lines, 10 is the PWM IN1, 11 is the PWM IN2, 12 is the PWM speed - regulation signal (adjusting the duty cycle), 13, 14 are the solenoid valve signal control lines, 15, 16 are the counter signal lines, 17 is the PWM power input +, 18 is the PWM power input -, 26 is the communication line, 27, 28, 29, 30, 31, 32 are the power lines, and 200 is the door lock. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically elaborate on the practical electronic control system for detecting the service life of an electric suction automotive door lock of the present invention.

[0033] The practical electronic control system 100 for detecting the service life of an electric suction automotive door lock is used to detect the durability of the automotive door lock.

[0034] Currently, the action switching of the self - suction door lock of an automobile is controlled by the changes of the lock - tongue signal, pawl signal, and middle - position signal. When the cylinder locks the door to the half - locked state, the lock - tongue signal flips. When the door lock receives the suction command, it performs the suction action. After the suction until the pawl signal flips, the door lock resets until the middle - position signal flips. After the reset is completed, the door lock performs the unlocking action. After the unlocking until the pawl signal flips, the door lock continues to perform the reset action until the middle - position signal flips.

[0035] As Figure 1 、 Figure 2As shown in the figure, a practical electronic control system 100 for life detection of an electric suction automotive door lock includes: an external force upper half-lock unit 10, a PWM output module 20, a PLC (Programmable Logic Controller) 30, a single-chip microcomputer 40, and a power supply module.

[0036] The external force upper half-lock unit 10 is used to upper half-lock the door lock 200. Specifically, the external force upper half-lock unit 10 includes: a relay 11, a solenoid valve 12, and a cylinder 13. The relay 11 is connected to the single-chip microcomputer 40, the solenoid valve 12 is connected to the relay 11, and the cylinder 13 is connected to the solenoid valve. The operation of the cylinder 13 can drive the upper half-lock of the door lock 200.

[0037] In this embodiment, the external force upper half-lock unit 10 further includes a counter 14, and the counter 14 is used to record the number of times the single-chip microcomputer 40 controls the relay 11 to be turned on.

[0038] The PWM output module 20 is connected to the door lock 200, and the PWM output module 20 is used to control the operation of the door lock 200. Specifically, the PWM output module 20 controls the forward and reverse rotation of the door lock motor and different pulse voltages. The different pulse voltages are determined according to the PWM duty ratio sent by the single-chip microcomputer 40. Specifically, the PWM output module 20 is an H-bridge.

[0039] The PLC 30 is connected to the door lock 200. The PLC 30 is used to detect the door lock signal, count the number of detections of the door lock 200, and give an alarm according to the door lock signal. Number of detections of the door lock 200: From the upper half-lock of the door lock 200 to the suction, to the suction reset, to the unlocking, to the unlocking reset, that is, one switching process of the door lock 200 is one detection process, and it is counted as 1 detection.

[0040] Specifically, the door lock signals include a latch signal S1, a middle position signal S2, and a pawl signal S3.

[0041] Judge whether to give an alarm according to the running time of the four stages of the door lock 200's suction, suction reset, unlocking, and unlocking reset. If the running time of any stage exceeds the set threshold, the PLC will give an alarm.

[0042] Specifically, the method of whether to give an alarm during the operation of the four stages is as follows:

[0043] Alarm for suction failure: Start timing when the latch signal flips from S1 = 1 to S1 = 0, and end timing when the pawl signal flips from S3 = 1 to S3 = 0. If the timing time is greater than 2500 ms, the suction of the door lock 200 fails, the PLC alarms and records it, otherwise it does not alarm.

[0044] Suction reset failure alarm: When the pawl signal flips from S3 = 1 to S3 = 0, the timing starts, and when the middle position signal flips from S2 = 1 to S2 = 0, the timing ends. If the timing time is greater than 3200ms, the suction of the door lock 200 fails, and the PLC alarms and records. Otherwise, there is no alarm.

[0045] Unlocking failure alarm: When the middle position signal flips from S2 = 0 to S2 = 1 and S1 = 0, the timing starts, and when the pawl signal flips from S3 = 0 to S3 = 1, the timing ends. If the timing time is greater than 1000ms, the unlocking of the door lock 200 fails, and the PLC alarms and records. Otherwise, there is no alarm.

[0046] Unlocking reset failure alarm: When the pawl signal flips from S3 = 0 to S3 = 1, the timing starts, and when the middle position signal flips from S2 = 1 to S2 = 0, the timing ends. If the timing time is greater than 1700ms, the unlocking reset of the door lock 200 fails, and the PLC alarms and records. Otherwise, there is no alarm.

[0047] When counting the detection times of the door lock 200, it is counted according to the cycle times of the lock tongue signal. The method for counting the detection times is as follows: When the lock tongue signal flips from S1 = 1 to S1 = 0 and then flips to S1 = 1, it is a cycle, and the count is 1 time. Each time a cycle is completed, the count is incremented by 1.

[0048] The single-chip microcomputer 40 is connected to the external force upper half-lock unit 10, the PWM output module 20, and the door lock 200. The single-chip microcomputer 40 is used to control the external force upper half-lock unit 10 to upper half-lock the door lock 200, receive the door lock signal feedback by the door lock 200, and send the PWM signal for controlling the suction, suction reset, unlocking, and unlocking reset of the door lock 200 to the PWM output module 20 according to the received door lock signal.

[0049] Specifically, the PWM signal includes IN1, IN2, and the PWM duty cycle. The operation of the door lock 200 is controlled by setting the values of IN1, IN2, and the PWM duty cycle. The forward and reverse rotation of the door lock motor is controlled by the values of IN1 and IN2, and different pulse voltages are provided for the door lock motor by setting the PWM duty cycle. The PWM duty cycle is set according to the voltage requirements and duty settings in different stages of the operation of the door lock 200 in accordance with the endurance test cycle part of the corresponding door lock 200 test specification.

[0050] The power supply module includes a first power supply 51 and a second power supply 52. The first power supply 51 is connected to the single-chip microcomputer 40 and the PLC. The first power supply 51 is used to supply power to the single-chip microcomputer 40 and the PLC30. The second power supply 52 is connected to the PWM output module 20 and is used to supply power to the PWM output module 20. Specifically, both the first power supply 51 and the second power supply 52 are DC regulated power supplies.

[0051] In this embodiment, an optocoupler 60 is connected between the door lock 200 and the PLC 30. The optocoupler 60 is used to convert the door lock signal of the door lock 200 and then send it to the PLC. Specifically, the optocoupler 60 is used to convert the 5v signal of the door lock signal (bolt signal S1, middle position signal S2, pawl signal S3) of the door lock 200 into a 24v signal and then send it to the PLC 30.

[0052] In this embodiment, a buck module 70 is connected between the first power supply 51 and the single-chip microcomputer 40. The first power supply 51 provides a voltage of 24v, and the buck module 70 reduces the voltage of 21v provided by the first power supply 51 and then supplies power to the single-chip microcomputer 40.

[0053] In this embodiment, the practical electronic control system 100 for detecting the life of an electric suction car door lock further includes: a touch screen 80. The touch screen 80 is connected to the PLC 30, and the touch screen 80 is used to display monitoring information, the number of detections, and alarm records. Specifically, it displays the bolt signal S1, the middle position signal S2, the pawl signal S3, and the on / off conditions of the bolt signal S1, the middle position signal S2, and the pawl signal S3, the number of times of the entire switching process of the door lock 200 from the upper half-lock to the unlocking and resetting, and the alarms and records in each stage of the door lock 200 during suction, suction reset, unlocking, and unlocking reset.

[0054] When the single-chip microcomputer 40 controls the door lock 200, it programs and sets the single-chip microcomputer according to the action process of the door lock 200, so that the single-chip microcomputer 40 can control the door lock 200 to perform tests.

[0055] Control flow:

[0056] During the test, the single-chip microcomputer 40 first controls the upper half-lock of the door lock 200.

[0057] Upper half-lock:

[0058] The single-chip microcomputer 40 sends a low level to the relay 11 to make the load end of the relay 11 connected. After the load end of the relay 11 is connected, the solenoid valve 12 is connected, the cylinder 13 actuates, and the door lock 200 performs the upper half-lock under the action of the cylinder, and the bolt signal of the door lock 200 flips (S1 = 0).

[0059] Door lock 200 suction:

[0060] The tongue signal inversion of the door lock 200 (i.e., the tongue signal S1 = 0) is fed back to the single-chip microcomputer 40. After receiving the tongue signal (S1 = 0), the single-chip microcomputer 40 performs the first-stage action of suction. The single-chip microcomputer 40 sends the preset IN1 = 1, IN2 = 0, and PWM duty cycle in this stage to the PWM output module. The PWM output module applies the pulse voltage in this stage to the door lock 200 according to the received duty cycle, and the door lock 200 performs the suction action. After the first-stage action in the suction stage has been performed for 500 ms, it turns to the second-stage action in the suction stage. The single-chip microcomputer 40 sends the preset IN1 = 1, IN2 = 0, and PWM duty cycle in this stage to the PWM output module. The PWM output module applies the pulse voltage in this stage to the door lock 200 according to the received duty cycle, and the door lock 200 continues to perform the suction action. Until the pawl signal is inverted (i.e., S3 changes from 1 to 0), the pawl signal (S3 = 0) is fed back to the single-chip microcomputer 40. After receiving the pawl signal inversion (S3 changes from 1 to 0), the single-chip microcomputer continues to power on the tongue motor for 60 ms and then powers off, and sends a dynamic braking instruction to the PWM output module: IN1 = 1, IN2 = 1. After the dynamic braking ends, the suction stage ends.

[0061] Suction reset of the door lock 200:

[0062] After the suction stage of the door lock 200 ends, it stays for 200 ms and then performs the suction reset. First, perform the first-stage action in the suction reset stage. The single-chip microcomputer 40 sends the preset IN1 = 0, IN2 = 1, and PWM duty cycle in this stage to the PWM output module. The PWM output module applies the pulse voltage in this stage to the door lock 200 according to the received duty cycle, and the door lock 200 performs the suction reset action. After the first-stage action in the suction reset stage has been performed for 50 ms, it turns to the second-stage action in the suction reset stage. At this time, the single-chip microcomputer 40 sends the preset IN1 = 0, IN2 = 1, and PWM duty cycle in this stage to the PWM output module. The PWM output module applies the pulse voltage in this stage to the door lock 200 according to the received duty cycle, and the door lock 200 continues to perform the suction reset action. Until the middle position signal is inverted (i.e., S2 changes from 1 to 0), after receiving the middle position signal inversion (S2 = 0), the single-chip microcomputer 40 continues to power on for 30 ms and then powers off, and sends a dynamic braking instruction to the PWM output module: IN1 = 1, IN2 = 1. After the dynamic braking ends, the suction reset stage ends.

[0063] Unlocking:

[0064] After the suction and reset stage ends, it stays for 5 s, and then unlocking is performed. First, the first-stage action of the unlocking stage is carried out. The single-chip microcomputer 40 sends the preset IN1 = 0, IN2 = 1, and PWM duty cycle of this stage to the PWM output module. The PWM output module applies the pulse voltage of this stage to the door lock 200 according to the received duty cycle, and the door lock 200 performs the unlocking action. After the first-stage action of the unlocking stage has been carried out for 200 ms, it turns to the second-stage action of the unlocking stage. At this time, the single-chip microcomputer 40 sends the preset IN1 = 0, IN2 = 1, and PWM duty cycle of this stage to the PWM output module. The PWM output module applies the pulse voltage of this stage to the door lock 200 according to the received duty cycle, and the door lock 200 continues to perform the unlocking action until the pawl signal flips (i.e., S3 changes from 0 to 1). After the single-chip microcomputer receives the signal flip, it continues to be powered on for 130 ms and then powered off, and sends a dynamic braking instruction to the PWM: IN1 = 1, IN2 = 1. After the dynamic braking ends, the unlocking stage ends.

[0065] Unlocking and resetting:

[0066] After the unlocking stage ends, it stays for 200 ms, and then unlocking and resetting are performed. First, the first-stage action of the unlocking and resetting stage is carried out. The single-chip microcomputer 40 sends the preset IN1 = 1, IN2 = 0, and PWM duty cycle of this stage to the PWM output module. The PWM output module applies the pulse voltage of this stage to the door lock 200 according to the received duty cycle, and the door lock 200 performs the unlocking and resetting action. After the first-stage action of the unlocking and resetting stage has been carried out for 50 ms, it turns to the second-stage action of the unlocking and resetting stage. At this time, the single-chip microcomputer 40 sends the preset IN1 = 0, IN2 = 1, and PWM duty cycle of this stage to the PWM output module. The PWM output module applies the pulse voltage of this stage to the door lock 200 according to the received duty cycle, and the door lock 200 continues to perform the unlocking and resetting action until the neutral signal flips (i.e., S2 changes from 1 to 0). After the single-chip microcomputer 40 receives the neutral signal flip, it continues to be powered on for 30 ms and then powered off, and sends a dynamic braking instruction to the PWM output module: IN1 = 1, IN2 = 1. After the dynamic braking ends, the unlocking and resetting stage ends.

[0067] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention.

Claims

1. A practical electronic control system for the life detection of an electric suction automotive door lock, characterized in that, Comprising: An external force upper half locking unit for upper half locking the door lock; A PWM output module connected to the door lock for controlling the operation of the door lock; A PLC connected to the door lock for detecting door lock signals, counting the number of door lock detections, and alarming according to the door lock signals; A single-chip microcomputer connected to the external force upper half locking unit, the PWM output module, and the door lock. The single-chip microcomputer is used to control the external force upper half locking unit to upper half lock the door lock, receive the door lock signals fed back by the door lock, and send PWM signals for controlling the door lock to suck in, suck in and reset, unlock, and unlock and reset to the PWM output module according to the received door lock signals; And A power supply module including a first power supply and a second power supply. The first power supply is connected to the single-chip microcomputer and the PLC for supplying power to the single-chip microcomputer and the PLC. The second power supply is connected to the PWM output module for supplying power to the PWM output module; The door lock signals include a latch signal S1, a middle position signal S2, and a pawl signal S3. Judge whether to alarm according to the running time of the four stages of the door lock sucking in, sucking in and resetting, unlocking, and unlocking and resetting. If the running time of any stage exceeds the set threshold, the PLC will alarm. When counting the number of door lock detections, count according to the number of cycles of the latch signal.

2. The practical electronic control system for detecting the service life of an electric suction car door lock according to claim 1, wherein: An optocoupler is connected between the door lock and the PLC, and the optocoupler is used to convert the door lock signals of the door lock and send them to the PLC.

3. The practical electronic control system for the life detection of an electric suction automotive door lock according to claim 1, characterized in that, It further comprises: A touch screen connected to the PLC for displaying monitoring information, the number of detections, and alarm records.

4. The practical electronic control system for detecting the service life of an electric suction car door lock according to claim 1, wherein: A step-down module is connected between the first power supply and the single-chip microcomputer.

5. The practical electronic control system for detecting the service life of an electric suction car door lock according to claim 1, wherein: The external force upper half locking unit includes a relay connected to the single-chip microcomputer, a solenoid valve connected to the relay, and a cylinder connected to the solenoid valve. The cylinder can push the door lock to upper half lock.

6. The practical electronic control system for detecting the service life of an electric suction car door lock according to claim 5, wherein: The external force upper half locking unit further includes a counter connected to the relay, and the counter is used to record the number of times the single-chip microcomputer controls the relay to be turned on.

7. The practical electronic control system for detecting the service life of an electric suction car door lock according to claim 1, wherein: The PWM output module is an H-bridge, and both the first power supply and the second power supply are DC regulated power supplies.

8. The practical electronic control system for detecting the service life of an electric suction car door lock according to claim 1, wherein: The PWM signals include IN1, IN2, and the PWM duty cycle, and the operation of the door lock is controlled by setting the values of IN1, IN2, and the PWM duty cycle.

9. The practical electric control system for the life detection of an electric suction automotive door lock according to claim 1, characterized in that: The method for determining whether to alarm during the operation of the four stages is as follows: Alarm for suction failure: Timing starts when the latch signal flips from S1 = 1 to S1 = 0 and ends when the pawl signal flips from S3 = 1 to S3 = 0. If the timing time is greater than 2500 ms, the door lock suction fails, and the PLC alarms and records. Otherwise, no alarm is given. Alarm for suction reset failure: Timing starts when the pawl signal flips from S3 = 1 to S3 = 0 and ends when the middle position signal flips from S2 = 1 to S2 = 0. If the timing time is greater than 3200 ms, the door lock suction fails, and the PLC alarms and records. Otherwise, no alarm is given. Alarm for unlocking failure: Timing starts when the middle position signal flips from S2 = 0 to S2 = 1 and S1 = 0, and ends when the pawl signal flips from S3 = 0 to S3 = 1. If the timing time is greater than 1000 ms, the door lock unlocking fails, and the PLC alarms and records. Otherwise, no alarm is given. Alarm for unlocking reset failure: Timing starts when the pawl signal flips from S3 = 0 to S3 = 1 and ends when the middle position signal flips from S2 = 1 to S2 = 0. If the timing time is greater than 1700 ms, the door lock unlocking reset fails, and the PLC alarms and records. Otherwise, no alarm is given. The method for counting the detection times is as follows: A cycle is completed when the latch signal flips from S1 = 1 to S1 = 0 and then to S1 = 1, and the count is 1 time. The count is incremented by 1 for each completed cycle.

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