A particle sensor PCB function automatic test system and operation method thereof

Abstract

The invention discloses an automatic test system for a particle sensor PCB function and an operation method thereof, and belongs to the technical field of particle sensor detection. The invention discloses an automatic test system for a particle sensor PCB function, comprising a controller body, a controller body detection module, a host computer unit, a J-LINK burner, a USB to CAN module and a power module. The controller body detection module, the host computer unit, the J-LINK burner, the USB to CAN module and the power module are all connected to the controller body. The invention has full functional coverage and is specially designed for a particle sensor controller in a diesel vehicle aftertreatment system. Burning and multiple function tests are integrated in the same system. Through the coordinated work of a burning host computer and a test host computer, the automatic operation of the whole process from the placement of the controller body to the end of the test is realized, thereby greatly reducing manual intervention, avoiding various uncertainties and errors caused by manual operation, and thereby improving the overall efficiency and accuracy of the test.

Description

Technical Field

[0001] The present invention relates to the technical field of particle sensor detection, and in particular to a particle sensor PCB function automatic testing system and an operation method thereof. Background Art

[0002] In diesel vehicle aftertreatment systems, particulate matter sensor controllers play a key role in monitoring and controlling particulate matter emissions. Currently, there are many deficiencies in the post-production testing technology for such controllers. Traditional testing methods often rely on scattered test equipment and a large amount of manual operation. For example, in the programming process, it is necessary to manually connect the programmer and manually start the programming program, which is prone to connection errors or operational errors, resulting in programming failures or data errors.

[0003] As for functional testing, especially when it comes to comprehensive testing of IDE functions, heater functions, temperature measurement line functions, etc., there is a lack of a complete set of automated integrated testing systems. Usually, each function needs to be tested separately on different test platforms, which not only makes the testing process cumbersome and time-consuming, but also the data compatibility and integration between different platforms are poor, making it difficult to accurately and comprehensively evaluate the overall performance of the controller;

[0004] In addition, due to the high degree of manual participation, the recording, organization and analysis of test data are prone to human bias, which reduces the reliability and effectiveness of the test results and cannot meet the requirements of diesel vehicle after-treatment systems for high-precision and high-efficiency production and testing of particulate matter sensor controllers. Therefore, an automatic test system for particulate matter sensor PCB function and its operation method are proposed. Summary of the invention

[0005] The object of the present invention is to provide a particle sensor PCB function automatic testing system and an operation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a particle sensor PCB function automatic test system, comprising a controller body, a controller body detection module, a host computer unit, a J-LINK burner, a USB to CAN module and a power module, wherein the controller body detection module, the host computer unit, the J-LINK burner, the USB to CAN module and the power module are all connected to the controller body;

[0007] The controller body detection module includes multiple digital ammeters, multiple digital voltmeters, multiple linear adjustable resistors, relays and multiple 485 to USB units;

[0008] The digital ammeter is used to accurately measure the current value in the circuit, and the digital voltmeter is used to accurately measure the current value in the circuit. The above settings provide accurate data basis for evaluating the current characteristics of the controller body when different functions are running;

[0009] The linear adjustable resistor is used to provide accurate resistance parameter change conditions for the controller body test, simulate various resistance change conditions in actual work, and comprehensively test the coping ability of the controller body;

[0010] The relay is used to simulate different working states. In the IDE function test, it is selectively turned on according to the test host computer instruction to achieve the linear change output of the IDE terminal resistance according to 30MΩ, 10MΩ, 1MΩ, and 500Ω, so as to simulate different working states and test the performance of the controller body in terms of IDE function.

[0011] Among them, the 485 to USB unit is used to realize data transmission conversion between devices of different interface types, so that various devices in the test system can effectively interact with data, thereby ensuring the smooth flow and processing of data in each link, thereby improving the compatibility and scalability of the test system.

[0012] As a further preferred embodiment of the present technical solution: the host computer group includes a test host computer, a burning host computer and a voltage and current detection unit;

[0013] The test host computer is used to fit the test curve, calculate the error and send the test results, upload all the test data to the database for archiving, realize the comprehensive control and data management of the whole test process, and automatically start the PCB function test process for the controller body after the controller body is powered on again and the breakpoint is detected to be closed, including sending different function test instructions, receiving and processing various data in the test process;

[0014] The burning host computer is used to be responsible for the burning operation of the controller body test program. After detecting that the breakpoint formed by the reserved short-circuit probe point on the PCB board is closed, the burning program is automatically started, and after the burning is successful, the relevant equipment is disconnected according to the preset logic, so as to prepare for the subsequent functional test;

[0015] Wherein, the voltage and current detection unit is used for detecting voltage and current.

[0016] As a further preferred embodiment of the present technical solution: the J-LINK burner is used to accurately burn a specific test program for the controller body into the controller body, thereby ensuring the normal operation of its functions and the smooth implementation of subsequent tests.

[0017] As a further preferred embodiment of the present technical solution: the USB to CAN module is used for transmission and communication between CAN bus data and the upper computer unit, ensuring that in the IDE function test and other links, the output data of the CAN bus can be collected and processed by the upper computer unit in a timely and accurate manner, thereby realizing effective testing and monitoring of the CAN bus communication function of the controller body.

[0018] As a further preferred embodiment of the present technical solution: the power supply module is used to provide a stable and reliable power supply for the entire test system. The power supply module adopts a 24V power supply to meet the power supply requirements during the controller body testing process, ensuring that the test is carried out under the specified voltage conditions, and ensuring the accuracy and comparability of the test results.

[0019] A method for operating a particle sensor PCB function automatic test system comprises the following steps:

[0020] S1. Test preparation:

[0021] A1. Place the controller body on the test fixture and ensure that the connectors are reliably connected, thus providing a stable physical connection foundation for subsequent programming and testing operations;

[0022] A2. Open the burning host computer, and after detecting that the breakpoint formed by the reserved short-circuit probe point on the PCB board is closed, the specific test program for the controller body is automatically burned;

[0023] A3. After the burning is successful, the burning host computer automatically disconnects the power supply and the burner according to the preset instructions, preparing for the functional test, thereby ensuring the continuity and automation of the test process;

[0024] S2, PCB function test: Open the test host computer, re-power on the controller body, and automatically start testing the PCB function after detecting that the breakpoint is closed;

[0025] B1. IDE function test:

[0026] B11, the test host computer sends a start test IDE command to start the test process for the controller body IDE function;

[0027] B12. After receiving the command, the controller body outputs a voltage of 35V-50V. The host computer controls the relay to selectively open to make the IDE terminal resistance change linearly to 30MΩ, 10MΩ, 1MΩ, and 500Ω outputs, and each resistance value is maintained for 2s, thereby simulating the resistance change of IDE under different working conditions.

[0028] B13. Record the output current value of the CAN bus under the four resistors, as well as the values ​​of the digital ammeter and digital voltmeter, so as to comprehensively collect multi-source data related to the IDE function, thus providing a data basis for subsequent analysis;

[0029] B14. Verify whether the CAN bus output current is equal to the digital ammeter current, and the digital voltmeter voltage fluctuation is less than 0.1V. Ensure the accuracy of the test data and the normality of the controller IDE function through data comparison;

[0030] B15. The test host computer sends a stop test IDE command, fits the test curve, calculates the error and sends the test result, analyzes and processes the IDE function test data, and evaluates the performance of the controller body in terms of IDE function;

[0031] B2. Heater function test:

[0032] B21, the test host computer sends a start test heater command to start the test process for the controller body heater function;

[0033] B22. Set a linear adjustable resistor value to 2Ω, and change the heater voltage linearly from 0V to 12V at a speed of 1V / s. Record the values ​​of the digital ammeter and digital voltmeter at both ends of the linear adjustable resistor, as well as the collected data value sent by the CAN bus, simulate the working state of the heater under different voltage and resistance conditions, and collect relevant data;

[0034] B23, the heater voltage value is set to 12V, a linear adjustable resistor is linearly changed from 1Ω to 3Ω at a speed of 1Ω / s, and the digital ammeter and digital voltmeter values ​​at both ends of the linear adjustable resistor are recorded again, as well as the collected data value sent by the CAN bus, so as to further expand the test conditions and comprehensively test the control and monitoring capabilities of the controller body on the heater function;

[0035] B24, the test host computer sends a command to stop testing the heater, fits the test curve, calculates the error and sends the test result, analyzes and processes the heater function test data, and evaluates the performance of the controller body in terms of the heater function;

[0036] B3. Thermometer function test:

[0037] B31, the test host computer sends a command to start the test temperature device, starting the test process for the temperature measurement line function of the controller body;

[0038] B32. Set the value of another linear adjustable resistor to 1Ω, and change it linearly from 1Ω to 3Ω at a speed of 0.1Ω / s. Record the values ​​of the digital ammeter and digital voltmeter at both ends of the other linear adjustable resistor, as well as the collected data values ​​sent by the CAN bus. Simulate the working state of the temperature measuring line under different resistance changes and collect relevant data.

[0039] B33, the host computer sends a command to stop testing the thermometer, fits the test curve, calculates the error and sends the test result, analyzes and processes the temperature measurement line function test data, and evaluates the performance of the controller body in terms of the temperature measurement line function;

[0040] S3, data archiving: record all data and upload them to the database for archiving, ending the test.

[0041] As a further preferred embodiment of the present technical solution: in A2, the automatic detection and burning function of the burning host computer is utilized to reduce the errors and uncertainties caused by manual operation.

[0042] As a further preferred embodiment of the present technical solution: in S3, various data generated during the test are uniformly stored to facilitate subsequent performance evaluation, fault diagnosis and product optimization of the controller body, while also providing data support for the overall performance research of the diesel vehicle after-treatment system.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1. The present invention is highly automated and integrated, with full functional coverage. It is specially designed for the particulate matter sensor controller in the diesel vehicle post-treatment system, and integrates the burning and multiple functional tests in the same system. Through the coordinated work of the burning host computer and the test host computer, the whole process from the placement of the controller body to the end of the test is automated, thereby greatly reducing manual intervention and avoiding various uncertainties and errors caused by manual operation, thereby improving the overall efficiency and accuracy of the test;

[0045] 2. The precise functional test of the present invention designs a special test process and parameter control method for the key functions (IDE, heater, and temperature measurement line functions) of the particulate matter sensor controller. That is, in the IDE functional test, the relay is precisely controlled to achieve a specific linear change in the IDE terminal resistance, and multi-source data such as the CAN bus, digital ammeter, and digital voltmeter are collected and analyzed in real time. In the heater functional test, the test is performed according to a specific voltage and resistance change law, which can comprehensively and accurately detect the performance of the controller under different working conditions and ensure its reliability in the complex environment of the diesel vehicle aftertreatment system.

[0046] 3. The data management and analysis of the present invention has advantages. During the test process, various types of data can be collected and integrated in real time, and in-depth analysis and processing such as data fitting curves and calculation errors can be performed through the test host computer. Finally, all test data are uploaded to the database for archiving. The above data management and analysis method is helpful for long-term tracking and evaluation of the performance of the particulate matter sensor controller, and provides strong data support for the optimization and fault diagnosis of the diesel vehicle after-treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the architecture of a particle sensor PCB function automation test system of the present invention;

[0048] Figure 2 The present invention is a flowchart of an operation method of a particle sensor PCB function automatic test system. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0050] Example 1

[0051] See also Figure 1 , the present invention provides a technical solution: a particle sensor PCB function automatic test system, including a controller body, a controller body detection module, a host computer unit, a J-LINK burner, a USB to CAN module and a power module, the controller body detection module, the host computer unit, the J-LINK burner, the USB to CAN module and the power module are all connected to the controller body;

[0052] The controller body detection module includes multiple digital ammeters, multiple digital voltmeters, multiple linear adjustable resistors, relays and multiple 485 to USB units;

[0053] Among them, the digital ammeter is used to accurately measure the current value in the circuit, and the digital voltmeter is used to accurately measure the current value in the circuit. The above settings provide accurate data basis for evaluating the current characteristics of the controller body when different functions are running;

[0054] Among them, the linear adjustable resistor is used to provide accurate resistance parameter change conditions for the controller body test, simulate various resistance change situations in actual work, and comprehensively test the coping ability of the controller body. In the heater function test, a linear adjustable resistor is set to 2Ω and its voltage is linearly changed from 0V to 12V at a speed of 1V / s, and when the voltage value is set to 12V, a linear adjustable resistor is linearly changed from 1Ω to 3Ω at a speed of 1Ω / s. In the temperature measurement line function test, another linear adjustable resistor is set to 1Ω and linearly changed from 1Ω to 3Ω at a speed of 0.1Ω / s, thereby providing accurate resistance parameter change conditions for the heater function and temperature measurement line function tests of the controller body, simulating various resistance change situations in actual work, and comprehensively testing the coping ability of the controller;

[0055] Among them, the relay is used to simulate different working states. In the IDE function test, it is selectively opened according to the test host computer command to achieve the linear change output of the IDE terminal resistance according to 30MΩ, 10MΩ, 1MΩ, and 500Ω to simulate different working states and test the performance of the controller body in terms of IDE function;

[0056] Among them, the 485 to USB unit is used to realize data transmission conversion between devices of different interface types, so that various devices in the test system can effectively interact with each other, thereby ensuring the smooth flow and processing of data in each link, thereby improving the compatibility and scalability of the test system.

[0057] In this embodiment, specifically: the controller body detection module also includes a fixed value resistor, which plays a role in stabilizing current, voltage, etc. in the entire test circuit, ensuring that the test system can operate stably under different test conditions and avoiding interference with the test results due to circuit fluctuations.

[0058] In this embodiment, specifically: the host computer group includes a test host computer, a burning host computer and a voltage and current detection unit;

[0059] Among them, the test host computer is used to fit the test curve, calculate the error and send the test results, upload all the test data to the database for archiving, realize the comprehensive control and data management of the whole test process, and automatically start the PCB function test process for the controller body after the controller body is powered on again and the breakpoint is detected to be closed, including sending different function test instructions (start test IDE instruction, start test heater instruction, start test thermometer instruction, etc.), receiving and processing various data in the test process (digital ammeter, digital voltmeter value and CAN bus data, etc.);

[0060] The burning host computer is responsible for the burning operation of the controller body test program. After detecting the closure of the breakpoint formed by the reserved short-circuit probe point on the PCB board, the burning program is automatically started, and after the burning is successful, the relevant equipment is disconnected according to the preset logic to prepare for the subsequent functional test. The whole process does not require excessive human intervention, which improves the accuracy and efficiency of burning.

[0061] The voltage and current detection unit is used for detecting voltage and current.

[0062] In this embodiment, specifically: the J-LINK burner is used to accurately burn a specific test program for the controller body into the controller body, thereby ensuring the normal operation of its functions and the smooth implementation of subsequent tests.

[0063] In this embodiment, specifically: the USB to CAN module is used for transmission and communication between CAN bus data and the upper computer unit, ensuring that in the IDE function test and other links, the output data of the CAN bus can be collected and processed by the upper computer unit in a timely and accurate manner, thereby realizing effective testing and monitoring of the CAN bus communication function of the controller body.

[0064] In this embodiment, specifically: the power supply module is used to provide a stable and reliable power supply for the entire test system. The power supply module adopts a 24V power supply to meet the power supply requirements during the controller body test process, ensure that the test is carried out under the specified voltage conditions, and ensure the accuracy and comparability of the test results.

[0065] Example 2

[0066] See also Figure 2 , a method for operating a particle sensor PCB function automatic test system, comprising the following steps:

[0067] S1. Test preparation:

[0068] A1. Place the controller body on the test fixture and ensure that the connectors are reliably connected, thus providing a stable physical connection foundation for subsequent programming and testing operations;

[0069] A2. Open the burning host computer, and after detecting that the breakpoint formed by the reserved short-circuit probe point on the PCB board is closed, the specific test program for the controller body is automatically burned;

[0070] A3. After the burning is successful, the burning host computer automatically disconnects the power supply and the burner according to the preset instructions, preparing for the functional test, thereby ensuring the continuity and automation of the test process;

[0071] S2, PCB function test: Open the test host computer, re-power on the controller body, and automatically start testing the PCB function after detecting that the breakpoint is closed;

[0072] B1. IDE function test:

[0073] B11, the test host computer sends a start test IDE command to start the test process for the controller body IDE function;

[0074] B12. After receiving the command, the controller body outputs a voltage of 35V-50V. The host computer controls the relay to selectively open to make the IDE terminal resistance change linearly to 30MΩ, 10MΩ, 1MΩ, and 500Ω outputs, and each resistance value is maintained for 2s, thereby simulating the resistance change of IDE under different working conditions.

[0075] B13. Record the output current value of the CAN bus under the four resistors, as well as the values ​​of the digital ammeter and digital voltmeter, so as to comprehensively collect multi-source data related to the IDE function, thus providing a data basis for subsequent analysis;

[0076] B14. Verify whether the CAN bus output current is equal to the digital ammeter current, and the digital voltmeter voltage fluctuation is less than 0.1V. Ensure the accuracy of the test data and the normality of the controller IDE function through data comparison;

[0077] B15. The test host computer sends a stop test IDE command, fits the test curve, calculates the error and sends the test result, analyzes and processes the IDE function test data, and evaluates the performance of the controller body in terms of IDE function;

[0078] B2. Heater function test:

[0079] B21, the test host computer sends a start test heater command to start the test process for the controller body heater function;

[0080] B22. Set a linear adjustable resistor value to 2Ω, and change the heater voltage linearly from 0V to 12V at a speed of 1V / s. Record the values ​​of the digital ammeter and digital voltmeter at both ends of the linear adjustable resistor, as well as the collected data value sent by the CAN bus, simulate the working state of the heater under different voltage and resistance conditions, and collect relevant data;

[0081] B23, the heater voltage value is set to 12V, a linear adjustable resistor is linearly changed from 1Ω to 3Ω at a speed of 1Ω / s, and the digital ammeter and digital voltmeter values ​​at both ends of the linear adjustable resistor are recorded again, as well as the collected data value sent by the CAN bus, so as to further expand the test conditions and comprehensively test the control and monitoring capabilities of the controller body on the heater function;

[0082] B24, the test host computer sends a command to stop testing the heater, fits the test curve, calculates the error and sends the test result, analyzes and processes the heater function test data, and evaluates the performance of the controller body in terms of the heater function;

[0083] B3. Thermometer function test:

[0084] B31, the test host computer sends a command to start the test temperature device, starting the test process for the temperature measurement line function of the controller body;

[0085] B32. Set the value of another linear adjustable resistor to 1Ω, and change it linearly from 1Ω to 3Ω at a speed of 0.1Ω / s. Record the values ​​of the digital ammeter and digital voltmeter at both ends of the other linear adjustable resistor, as well as the collected data values ​​sent by the CAN bus. Simulate the working state of the temperature measuring line under different resistance changes and collect relevant data.

[0086] B33, the host computer sends a command to stop testing the thermometer, fits the test curve, calculates the error and sends the test result, analyzes and processes the temperature measurement line function test data, and evaluates the performance of the controller body in terms of the temperature measurement line function;

[0087] S3, data archiving: record all data and upload them to the database for archiving, ending the test.

[0088] In this embodiment, specifically: in A2, the automatic detection and burning function of the burning host computer is used to reduce the errors and uncertainties caused by manual operation.

[0089] In this embodiment, specifically: in S3, various types of data generated during the test are uniformly stored to facilitate subsequent performance evaluation, fault diagnosis, and product optimization of the controller body, while also providing data support for the overall performance research of the diesel vehicle after-treatment system.

[0090] Working principle: Place the controller body on the test fixture and ensure that the connector is reliably connected, so as to provide a stable physical connection basis for subsequent burning and testing operations. Turn on the burning host computer, detect the breakpoint formed by the reserved short-circuit probe point on the PCB board, and automatically burn the specific test program for the controller body. The automatic detection and burning function of the burning host computer is used to reduce the errors and uncertainties caused by manual operation. After the burning is successful, the burning host computer automatically disconnects the power supply and the burner according to the preset instructions to prepare for the functional test, so as to ensure the consistency and automation of the test process.

[0091] The test host computer is turned on to power on the controller body again. After detecting that the breakpoint is closed, the PCB function is automatically tested. The test host computer sends a start test IDE command to start the test process for the controller body IDE function. After receiving the command, the controller body outputs a 35V-50V voltage. The test host computer controls the relay to selectively open, so that the IDE terminal resistance changes linearly to 30MΩ, 10MΩ, 1MΩ, and 500Ω outputs, and each resistance value is maintained for 2s, thereby simulating the resistance change of IDE under different working conditions, and recording the output current value of the CAN bus under 4 resistors, as well as the digital ammeter and digital voltmeter values, so as to comprehensively collect multi-source data related to the IDE function, thereby providing a data basis for subsequent analysis, verifying whether the CAN bus output current is equal to the digital ammeter current, and the digital voltmeter voltage fluctuation is less than 0.1V. The accuracy of the test data and the normality of the controller IDE function are ensured through data comparison. The test host computer sends a stop test IDE command, fits the test curve, calculates the error and sends the test result, analyzes and processes the IDE function test data, and evaluates the performance of the controller body in terms of IDE function.

[0092] The test host computer sends a start test heater instruction to start the test process for the heater function of the controller body, sets a linear adjustable resistor value to 2Ω, and the heater voltage changes linearly from 0V to 12V at a speed of 1V / s. The digital ammeter and digital voltmeter values ​​at both ends of a linear adjustable resistor, as well as the collected data values ​​sent by the CAN bus, simulate the working state of the heater under different voltage and resistance conditions, and collect relevant data. The heater voltage value is set to 12V, and a linear adjustable resistor changes linearly from 1Ω to 3Ω at a speed of 1Ω / s. The digital ammeter and digital voltmeter values ​​at both ends of a linear adjustable resistor, as well as the collected data values ​​sent by the CAN bus are recorded again, thereby further expanding the test conditions and comprehensively testing the controller body's control and monitoring capabilities for the heater function. The test host computer sends a stop test heater instruction, fits the test curve, calculates the error and sends the test results, analyzes and processes the heater function test data, and evaluates the performance of the controller body in terms of the heater function.

[0093] The test host computer sends a command to start the test thermometer, starts the test process for the temperature measuring line function of the controller body, sets the value of another linear adjustable resistor to 1Ω, changes linearly from 1Ω to 3Ω at a speed of 0.1Ω / s, records the values ​​of the digital ammeter and digital voltmeter at both ends of the other linear adjustable resistor, and the collected data values ​​sent by the CAN bus, simulates the working state of the temperature measuring line under different resistance changes, collects relevant data, and the host computer sends a command to stop the test thermometer, fits the test curve, calculates the error and sends the test results, analyzes and processes the temperature measuring line function test data, and evaluates the performance of the controller body in terms of the temperature measuring line function;

[0094] Record all data and upload them to the database for archiving. When the test is finished, all types of data generated during the test will be stored in a unified manner to facilitate subsequent performance evaluation, fault diagnosis, and product optimization of the controller itself. This will also provide data support for the overall performance research of the diesel vehicle after-treatment system.

[0095] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A particle sensor PCB function automatic test system, including a controller body, a controller body detection module, a host unit, a J-LINK burner, a USB to CAN module and a power module, characterized in that: The controller body detection module, the upper computer unit, the J-LINK burner, the USB to CAN module and the power module are all connected to the controller body; The controller body detection module includes multiple digital ammeters, multiple digital voltmeters, multiple linear adjustable resistors, relays and multiple 485 to USB units; Wherein, the digital ammeter is used to accurately measure the current value in the circuit, and the digital voltmeter is used to accurately measure the current value in the circuit; The linear adjustable resistor is used to provide accurate resistance parameter change conditions for the controller body test, simulate various resistance change conditions in actual work, and comprehensively test the coping ability of the controller body; Wherein, the relay is used to simulate different working states; Among them, the 485 to USB unit is used to realize data transmission conversion between devices of different interface types, so that various devices in the test system can effectively interact with data, thereby ensuring the smooth flow and processing of data in each link, thereby improving the compatibility and scalability of the test system.

2. The particle sensor PCB function automatic test system according to claim 1, characterized in that: The host computer group includes a test host computer, a burning host computer and a voltage and current detection unit; The test host computer is used to fit the test curve, calculate the error and send the test results, upload all the test data to the database for archiving, and realize the comprehensive control and data management of the entire test process; The burning host computer is used to be responsible for the burning operation of the controller body test program; Wherein, the voltage and current detection unit is used for detecting voltage and current.

3. The particle sensor PCB function automatic test system according to claim 1, characterized in that: The J-LINK burner is used to accurately burn a specific test program for the controller body into the controller body, thereby ensuring the normal operation of its functions and the smooth implementation of subsequent tests.

4. The particle sensor PCB function automatic test system according to claim 1, characterized in that: The USB to CAN module is used for transmission and communication between CAN bus data and the upper computer unit.

5. The particle sensor PCB function automatic test system according to claim 1, characterized in that: The power supply module is used to provide a stable and reliable power supply for the entire test system.

6. A method for operating a particle sensor PCB function automation test system, characterized in that: The following steps are involved: S1. Test preparation: A1. Place the controller body on the test fixture and ensure that the connectors are reliably connected, thus providing a stable physical connection foundation for subsequent programming and testing operations; A2. Open the burning host computer, and after detecting that the breakpoint formed by the reserved short-circuit probe point on the PCB board is closed, the specific test program for the controller body is automatically burned; A3. After the burning is successful, the burning host computer automatically disconnects the power supply and the burner according to the preset instructions, preparing for the functional test, thereby ensuring the continuity and automation of the test process; S2, PCB function test: Open the test host computer, re-power on the controller body, and automatically start testing the PCB function after detecting that the breakpoint is closed; B1. IDE function test: B11, the test host computer sends a start test IDE command to start the test process for the controller body IDE function; B12. After receiving the command, the controller body outputs a voltage of 35V-50V. The host computer controls the relay to selectively open to make the IDE terminal resistance change linearly to 30MΩ, 10MΩ, 1MΩ, and 500Ω outputs, and each resistance value is maintained for 2s, thereby simulating the resistance change of IDE under different working conditions. B13. Record the output current value of the CAN bus under the four resistors, as well as the values ​​of the digital ammeter and digital voltmeter, so as to comprehensively collect multi-source data related to the IDE function, thus providing a data basis for subsequent analysis; B14. Verify whether the CAN bus output current is equal to the digital ammeter current, and the digital voltmeter voltage fluctuation is less than 0.1V. Ensure the accuracy of the test data and the normality of the controller IDE function through data comparison; B15. The test host computer sends a stop test IDE command, fits the test curve, calculates the error and sends the test result, analyzes and processes the IDE function test data, and evaluates the performance of the controller body in terms of IDE function; B2. Heater function test: B21, the test host computer sends a start test heater command to start the test process for the controller body heater function; B22. Set a linear adjustable resistor value to 2Ω, and change the heater voltage linearly from 0V to 12V at a speed of 1V / s. Record the values ​​of the digital ammeter and digital voltmeter at both ends of the linear adjustable resistor, as well as the collected data value sent by the CAN bus, simulate the working state of the heater under different voltage and resistance conditions, and collect relevant data; B23, the heater voltage value is set to 12V, a linear adjustable resistor is linearly changed from 1Ω to 3Ω at a speed of 1Ω / s, and the digital ammeter and digital voltmeter values ​​at both ends of the linear adjustable resistor are recorded again, as well as the collected data value sent by the CAN bus, so as to further expand the test conditions and comprehensively test the control and monitoring capabilities of the controller body on the heater function; B24, the test host computer sends a command to stop testing the heater, fits the test curve, calculates the error and sends the test result, analyzes and processes the heater function test data, and evaluates the performance of the controller body in terms of the heater function; B3. Thermometer function test: B31, the test host computer sends a command to start the test temperature device, starting the test process for the temperature measurement line function of the controller body; B32. Set the value of another linear adjustable resistor to 1Ω, and change it linearly from 1Ω to 3Ω at a speed of 0.1Ω / s. Record the values ​​of the digital ammeter and digital voltmeter at both ends of the other linear adjustable resistor, as well as the collected data values ​​sent by the CAN bus. Simulate the working state of the temperature measuring line under different resistance changes and collect relevant data. B33, the host computer sends a command to stop testing the thermometer, fits the test curve, calculates the error and sends the test result, analyzes and processes the temperature measurement line function test data, and evaluates the performance of the controller body in terms of the temperature measurement line function; S3, data archiving: record all data and upload them to the database for archiving, ending the test.

7. The operating method of the particle sensor PCB function automatic test system according to claim 6 is characterized by: In A2, the automatic detection and burning functions of the burning host computer are used to reduce the errors and uncertainties caused by manual operations.

8. The operating method of the particle sensor PCB function automatic test system according to claim 6, characterized in that: In S3, all types of data generated during the test are stored in a unified manner, which is convenient for subsequent performance evaluation, fault diagnosis and product optimization of the controller body, and also provides data support for the overall performance research of the diesel vehicle after-treatment system.

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