A general test system for vehicle air conditioner controller

Abstract

The utility model relates to vehicle air conditioner controller test technical field especially, a kind of general test system of vehicle air conditioner controller, including MCU control module, power module, voltage sampling module, indicating button module, high-low level detection module, motor positive and negative rotation detection module, analog sensor output module, PWM sampling module, CAN communication module and connector;The MCU control module is connected with each module of system, for data processing and instruction control;The connector is connected with the voltage sampling module, the power module, the indicating button module, the high-low level detection module, the motor positive and negative rotation detection module, the analog sensor output module, the PWM sampling module and the CAN communication module, and each module of system is connected with external product. At least for solving the problem that existing test equipment compatibility is poor.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air conditioning controller testing technology, and in particular to a universal testing system for vehicle air conditioning controllers. Background Technology

[0002] With the rapid development of automotive electronics technology, the functions of electronic components such as in-vehicle air conditioning controllers are becoming increasingly integrated and complex. Their performance stability and reliability directly affect the vehicle's driving experience and driving safety. During the research, development, production, and maintenance of in-vehicle electronic components, it is necessary to use professional testing equipment to comprehensively verify their core functions, such as signal level interaction, motor control response, sensor signal adaptation, and communication link connectivity, to ensure that the products meet design standards.

[0003] Currently, automotive electronic component testing equipment on the market has many limitations: traditional testing equipment is mostly designed for specific purposes, only suitable for specific models and voltage specifications of the products under test, and cannot meet the testing needs of multiple voltage levels and types of automotive electronic components such as 12V / 24V, resulting in poor versatility of the testing equipment and increasing the equipment investment costs for enterprises; some testing equipment can only perform single-function testing, lacking the integration of multi-dimensional testing functions such as motor forward and reverse rotation detection, PWM signal sampling, CAN communication interaction, and voltage regulation sampling, requiring multiple devices to complete comprehensive testing, making the testing process cumbersome and inefficient.

[0004] Therefore, there is an urgent need for a testing device that is versatile, fully functional, and easy to operate, in order to solve the problems of poor compatibility, limited functionality, and insufficient flexibility of existing testing devices. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a universal testing system for vehicle air conditioning controllers.

[0006] This utility model is achieved through the following technical solution: a universal testing system for vehicle air conditioning controllers, comprising an MCU control module, a power supply module, a voltage sampling module, an indicator button module, a high / low level detection module, a motor forward / reverse rotation detection module, an analog sensor output module, a PWM sampling module, a CAN communication module, and connectors; the power supply module is connected to each module of the system and external products, and is used for system power supply and external power output; the MCU control module is connected to each module of the system, and is used for data processing and command control; the connectors are connected to the voltage sampling module, the power supply module, the indicator button module, the high / low level detection module, the motor forward / reverse rotation detection module, the analog sensor output module, the PWM sampling module, and the CAN communication module, and connect each module of the system to external products.

[0007] Furthermore, the power supply module is adapted to a 20-28V voltage input, and the power supply module is provided with a 24V output terminal and a 5V output terminal. The 24V output terminal and the 5V output terminal are electrically connected to the MCU control module, the voltage sampling module, the analog sensor output module and the connector, respectively.

[0008] Furthermore, the connector includes multiple sub-interfaces, namely J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, and J12, wherein: J1 is electrically connected to the high / low level detection module; J2 is electrically connected to the motor forward / reverse detection module and the external power supply output terminal of the power supply module; J3 is electrically connected to the CAN communication module, the PWM sampling module, the analog sensor output module, and the power supply module; J4 is electrically connected to the voltage sampling module; J5 and J6 are electrically connected to the display unit of the indicator button module; J7 is electrically connected to the voltage adjustment component of the voltage sampling module; J8 is electrically connected to the button unit of the indicator button module; J9, J10, and J11 are electrically connected to the indicator unit of the indicator button module; and J12 is electrically connected to the adjustable output component of the analog sensor output module.

[0009] Furthermore, the connector also includes a P1 to P8 high / low detection level signal switching interface, which is used to connect a switch to switch the detection signal. Its PIN 1 is grounded, PIN 2 is electrically connected to the relay coil terminal, and PIN 3 is electrically connected to the power module.

[0010] Furthermore, the analog sensor output module includes a fixed signal output subunit and an adjustable signal output subunit; the fixed signal output subunit is electrically connected to pins 9 to 16 of the J3 interface of the connector and is used to output a fixed analog sensor signal; the adjustable signal output subunit is electrically connected to the J12 interface of the connector, and the adjustable output component connected to the J12 interface is a panel knob component.

[0011] Furthermore, the J4 interface is used to acquire the adjustable voltage within the range of 24V and 5V; the J7 interface adjusts the voltage output within the range of 24V and 5V through the voltage adjustment component.

[0012] Furthermore, the indicator button module includes an indicator unit, a button unit, and a display unit; the indicator unit is a panel LED light group; the button unit is a panel matrix button; and the display unit includes two four-digit LED digital tubes.

[0013] Furthermore, the motor forward and reverse rotation detection module is electrically connected to pins 11 to 16 of the J2 interface of the connector, and is electrically connected to the positive and negative terminals of the external motor under test and the relay, respectively.

[0014] Furthermore, the CAN communication module is electrically connected to pins 3 to 6 of the J3 interface of the connector, and is adapted to connect to the external device interface via the CAN communication line; the PWM sampling module is electrically connected to pins 7 to 8 of the J3 interface of the connector, and is used to acquire two PWM input signals.

[0015] Furthermore, pins 1 to 7 and 9 of the J1 interface of the connector are the first signal input terminals, which are adapted to the 12V low-voltage level signal acquisition terminal; pins 8 and 10 to 16 of the J1 interface are the second signal input terminals, which are adapted to the 24V high and low level signal acquisition terminal, and the J1 interface is electrically connected to the switching switch corresponding to the P1 to P8 interfaces of the high and low level detection module.

[0016] The beneficial effects of this utility model are as follows: by integrating the MCU control module, power supply module, multi-dimensional signal acquisition and output module, and CAN communication module, and with standardized connectors and flexible switching mechanisms, the universality and comprehensiveness of vehicle air conditioning controller testing are achieved; it supports a wide voltage input of 20-28V and multiple output specifications of 24V / 5V / 12V, adapting to products under test with different voltage levels; the high and low level detection module can switch the detection mode through a switch, and the analog sensor output has both fixed and knob-adjustable dual modes. The voltage adjustment and sampling module are linked to achieve precise adaptation, greatly improving the testing flexibility. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of the general test system for vehicle air conditioning controllers in this application; Figure 2 This is a circuit diagram of the MCU control module of this application; Figure 3 This is a circuit diagram of the power module of this application; Figure 4 This is a circuit diagram for low-level detection in this application; Figure 5 This is a circuit diagram for high and low level detection in this application; Figure 6 This is the circuit diagram of the motor forward / reverse rotation detection module of this application; Figure 7 This is the circuit diagram of the voltage-type sensor in this application; Figure 8 This is the circuit diagram of the resistive sensor in this application; Figure 9 This is the circuit diagram of the CAN communication module; Figure 10 This is the circuit diagram of the PWM sampling module; Figure 11 This is the circuit diagram of the voltage sampling module; Figure 12 This is the circuit diagram for the connector; Figure 13 This is a flowchart of the general testing system for vehicle air conditioning controllers in this application. Detailed Implementation

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] This utility model discloses a vehicle air conditioning controller testing system, such as... Figure 1 As shown, it includes: a universal test system for vehicle air conditioning controllers, comprising an MCU control module, a power supply module, a voltage sampling module, an indicator button module, a high / low level detection module, a motor forward / reverse rotation detection module, an analog sensor output module, a PWM sampling module, a CAN communication module, and connectors; the power supply module is connected to each module of the system and external products, and is used for system power supply and external power output; the MCU control module is connected to each module of the system, and is used for data processing and command control; the connectors are connected to the voltage sampling module, the power supply module, the indicator button module, the high / low level detection module, the motor forward / reverse rotation detection module, the analog sensor output module, the PWM sampling module, and the CAN communication module, and connect each module of the system to external products.

[0021] like Figure 2As shown, the MCU control module uses a high-performance microcontroller, which is electrically connected to the signal output terminals of the voltage sampling module, high and low level detection module, and PWM sampling module through circuit board wiring to collect voltage signals, high and low level signals, and PWM wave signals in real time. At the same time, it has a bidirectional communication connection with the CAN communication module to complete the CAN protocol data interaction with external products, and sends status control signals to the indicator button module according to preset logic to drive the corresponding LED to light up or turn off, so as to realize the test status feedback.

[0022] like Figure 3 As shown, the power module adopts a wide voltage input design, adapting to 20-28V external power supply. Its output is divided into two paths: 24V and 5V, which are electrically connected to the power pins of the MCU control module, each detection / sampling module, analog sensor output module, and connectors, respectively. This provides a stable operating voltage for each module inside the system, outputs 24V power to the tested vehicle air conditioning controller, and outputs backlight power through the J2 interface.

[0023] The high / low level detection module consists of two parts: one part detects externally input 12V / 0V and 24V / 0V voltage signals, and the other part outputs high / low level signals to the external device. It includes a single-pole double-throw switch and relay assembly. This module connects to the external device under test via a J1 interface. By switching the positions of switches P1-P8, the high / low level detection mode can be flexibly switched. Simultaneously, the relay status is linked to the LED indicator on the button module to provide feedback on the detection result. Figure 4 The diagram shows an 8-channel low-level detection circuit for a 12V system. Figure 5 The diagram shows an 8-channel high / low level output detection circuit for a 24V system.

[0024] like Figure 6 As shown, the motor forward / reverse rotation detection module is used to detect the forward / reverse rotation status of the motor and provide an indication. It is electrically connected to the positive and negative terminals of the motor of the vehicle air conditioning controller under test via a J2 interface. This interface is also connected in series with a relay assembly. The relay signal output is connected to the MCU control module. When the motor rotates forward or reverse, the relay's conduction state changes. After receiving the signal, the MCU control module drives the corresponding LED of the indicator button module to light up, thus indicating the motor's rotation status.

[0025] The analog sensor output module provides a fixed set of analog sensor signals internally, or allows for selection and adjustment of the output signals via an external knob. The fixed signal output subunit is integrated into the circuit board, outputting six channels of preset analog sensor signals (including analog circuit break signals) via the J3 interface. The adjustable signal output subunit is electrically connected to the J12 interface, which features a mechanical knob on the front panel. This knob is mechanically and electrically connected to an internal variable resistor assembly. Rotating the knob changes the output signal parameters, adapting to different test scenarios requiring various sensor signals. Figure 7 The diagram shows a voltage-type sensor circuit; as shown... Figure 8 The diagram shows a resistive sensor circuit.

[0026] like Figure 9 As shown, the CAN communication module is used to interact with external products via CAN communication. It adopts a standard CAN transceiver and is electrically connected to the CAN interface of the external product under test through the J3 interface to realize CAN communication data interaction with the product under test. It supports remote configuration of test parameters and real-time uploading of test data.

[0027] like Figure 10 The diagram shows the PWM sampling module circuit; as shown... Figure 11 The diagram shows the voltage sampling circuit. The PWM sampling module and voltage sampling module are used to sample externally input PWM wave signals and voltage sampling signals. They are electrically connected to the PWM signal output terminal of the external product under test (DUT) via the J3 interface, acquiring two externally input PWM wave signals and transmitting them to the MCU control module for processing. The voltage sampling module is electrically connected to the J4 interface, which accepts 24V and 5V voltage signals. It acquires voltage data from the DUT and the system itself in real time. Simultaneously, it works in conjunction with the voltage regulation module, which adjusts the voltage within the 24V and 5V range via the J7 interface and its corresponding knob assembly. The adjusted voltage signal is fed back to the voltage sampling module via the J4 interface, forming a closed-loop adaptation.

[0028] The indicator button module (i.e., LED light buttons and indicator module) is used for manual operation and product status indication. It includes a panel matrix button, LED indicator group, and two four-digit LED digital tubes: The matrix button is electrically connected to the MCU control module through the J8 interface and is used for manual triggering of different logic test commands. The LED indicator group is electrically connected to the MCU control module one by one through the J9-J11 interfaces, respectively indicating the working status of functions such as high and low voltage detection, CAN communication, and motor direction detection; The two four-digit LED digital tubes are electrically connected to the MCU control module through the J5 and J6 interfaces. Pins 1-4 of the J5 and J6 interfaces are the bit code connection terminals, and pins 5-6 are the segment code IC communication connection terminals, used to display key parameters such as voltage value and test mode, and realize intuitive status feedback.

[0029] When the test system in this embodiment is working, the test parameters are first configured through the matrix keypad. After the power module is powered on, it supplies power to each module, and the system completes a self-test. The vehicle air conditioning controller under test is connected to the system through connectors. The MCU control module coordinates the acquisition of signals by each detection and sampling module, and synchronously outputs adaptation signals through the analog sensor output module. After logic processing, the signal drives the indicator key module to provide feedback on the status. At the same time, data interaction is realized through the CAN communication module to complete the multi-dimensional functional test of the vehicle air conditioning controller.

[0030] Furthermore, the power supply module is adapted to a 20-28V voltage input, and the power supply module is provided with a 24V output terminal and a 5V output terminal. The 24V output terminal and the 5V output terminal are electrically connected to the MCU control module, the voltage sampling module, the analog sensor output module and the connector, respectively.

[0031] Furthermore, such as Figure 12 As shown, the connector includes multiple sub-interfaces, namely J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, and J12. Specifically: J1 is electrically connected to the high / low level detection module; J2 is electrically connected to the motor forward / reverse detection module and the external power supply output of the power module; J3 is electrically connected to the CAN communication module, the PWM sampling module, the analog sensor output module, and the power module; J4 is electrically connected to the voltage sampling module; J5 and J6 are electrically connected to the display unit of the indicator button module; J7 is electrically connected to the voltage adjustment component of the voltage sampling module; J8 is electrically connected to the button unit of the indicator button module; J9, J10, and J11 are electrically connected to the indicator unit of the indicator button module; and J12 is electrically connected to the adjustable output component of the analog sensor output module.

[0032] J1 is the high and low level signal detection interface. Its pins 1-7 and 9 are used to connect 8 channels of 12V low voltage level signals to realize the detection and indication of external 12V / 0V level signals. Pins 8 and 10-16 are used to connect 8 channels of 24V high and low level signals, supporting bidirectional detection of 24V / 0V high and low levels. Before testing, the target detection level signal must be identified and the corresponding positions of switches P1-P8 should be adjusted.

[0033] J2 is a comprehensive output interface for high and low level signals, motor forward and reverse rotation signals, and power signals. Pins 1-7 are controlled by a program to output 24V / 0V high and low level signals. The default state is grounded. After the relay is driven by the program, it can be switched to 24V output. Pin 8 is the backlight power output terminal, pin 10 is the 24V power signal output terminal, and pin 9 is the ground terminal. It is used to provide 24V power signals and backlight power signals to the outside. The backlight power signal is output controlled by the relay controlled by the program. Pins 11-16 are used for three sets of motor forward and reverse rotation signal detection. When using, they need to be connected to the positive and negative terminals of the motor. The other side of this interface is connected to the relay. When the motor is powered on, the relay signal is activated, thus providing feedback on the motor's working status.

[0034] J3 and J12 are interfaces integrating power supply, CAN communication, PWM detection, and sensor signal simulation functions. Pins 1-2 of J3 are power signal output terminals, outputting 24V power; pins 3-6 are used for CAN communication, enabling CAN signal interaction with external devices; pins 7-8 are used for PWM input signal detection, capable of acquiring two external PWM wave signals; pins 9-16 are 6-channel analog sensor signal output terminals, providing analog sensor signals with fixed parameters from the circuit board, including analog open circuit signal detection function; J12 is a 6-channel adjustable analog sensor output interface, where the output signal parameters can be manually adjusted via knobs on the panel.

[0035] J4 and J7 are dedicated interfaces for voltage regulation and output sampling. J4 is used for sampling 24V and 5V power supply voltages and can collect regulated voltage data within this voltage range. J7 is used for voltage regulation output within the 24V and 5V range, and the output voltage value can be manually adjusted with the matching knob.

[0036] J5 and J6 are the control interfaces for two four-digit LED digital tubes. Pins 1-4 are digit code selection pins, used to control the digit codes of the two four-digit LEDs. Pins 5-6 are segment code IC communication interface pins, used to communicate with the LED segment code IC, thereby controlling the display content of the two four-digit LEDs.

[0037] J8 is a key detection interface, specifically designed for connecting to the panel matrix keys to detect and transmit manually operated key signals.

[0038] J9-J11 are LED indicator interfaces used to connect to panel LED indicators. The on / off status of the indicators provides intuitive feedback on whether functions such as high / low voltage detection and CAN communication are working properly.

[0039] Furthermore, the connector also includes a P1 to P8 high / low detection level switching signal interface, which is used to connect a switch to switch the detection signal. Its PIN 1 is grounded, PIN 2 is electrically connected to the relay coil terminal, and PIN 3 is electrically connected to the power module.

[0040] P1-P8 are high / low level detection signal toggle switches. Pin 1 is grounded, pin 2 is connected to the relay coil to provide the high / low level detection loop signal, and pin 3 is connected to the power supply. This switch can switch the detection signal: when low level detection is needed, the switch is set to the position where pins 2 and 3 are connected. In this position, the relay coil is connected to a 24V power supply. When an external low-level signal is input, the relay is energized, and the corresponding indicator light illuminates. When high level detection is needed, the switch is set to the position where pins 2 and 1 are connected. In this position, the relay coil is grounded. When an external high-level signal is input, the relay is energized, and the corresponding indicator light illuminates.

[0041] Furthermore, the analog sensor output module includes a fixed signal output subunit and an adjustable signal output subunit; the fixed signal output subunit is electrically connected to pins 9 to 16 of the J3 interface of the connector and is used to output a fixed analog sensor signal; the adjustable signal output subunit is electrically connected to the J12 interface of the connector, and the adjustable output component connected to the J12 interface is a panel knob component.

[0042] Furthermore, the J4 interface is used to acquire the adjustable voltage within the range of 24V and 5V; the J7 interface adjusts the voltage output within the range of 24V and 5V through the voltage adjustment component.

[0043] Furthermore, the indicator button module includes an indicator unit, a button unit, and a display unit; the indicator unit is a panel LED light group; the button unit is a panel matrix button; and the display unit includes two four-digit LED digital tubes.

[0044] Furthermore, the motor forward and reverse rotation detection module is electrically connected to pins 11 to 16 of the J2 interface of the connector, and is electrically connected to the positive and negative terminals of the external motor under test and the relay, respectively.

[0045] Furthermore, the CAN communication module is electrically connected to pins 3 to 6 of the J3 interface of the connector, and is adapted to connect to the external device interface via the CAN communication line; the PWM sampling module is electrically connected to pins 7 to 8 of the J3 interface of the connector, and is used to acquire two PWM input signals.

[0046] Furthermore, pins 1 to 7 and 9 of the J1 interface of the connector are the first signal input terminals, which are adapted to the 12V low-voltage level signal acquisition terminal; pins 8 and 10 to 16 of the J1 interface are the second signal input terminals, which are adapted to the 24V high and low level signal acquisition terminal, and the J1 interface is electrically connected to the switching switch corresponding to the P1 to P8 interfaces of the high and low level detection module.

[0047] like Figure 13 As shown, in this embodiment, the workflow of the general testing system for vehicle air conditioning controllers includes: Based on the parameter requirements of the external vehicle air conditioning controller being tested, the preset parameters such as test voltage and detection type are configured via the panel matrix buttons, and then the system power supply is activated. The power module automatically starts after being connected to a 20-28V external power supply. After processing by the internal voltage regulation circuit, it outputs two stable voltages: 24V and 5V. The 24V voltage supplies power to the MCU control module, high / low level detection module, motor forward / reverse detection module, CAN communication module, and the external power supply terminals of the J2 and J3 interfaces. The 5V voltage supplies power to the voltage sampling module, analog sensor output module, and the digital tubes and LED indicator groups of the indicator button module, ensuring that all functional modules of the system receive a suitable and stable operating voltage.

[0048] The high and low level detection module is connected to the level signal output terminal of the vehicle air conditioning controller under test through the J1 interface. Pins 1-7 and 9 of the J1 interface collect 8 channels of 12V / 0V low voltage level signals, and pins 8 and 10-16 collect 8 channels of 24V / 0V high and low level signals. The module converts the collected analog level signals into standard digital signals and transmits them to the MCU control module through the circuit board wiring. The ADC acquisition module is integrated into the voltage sampling module and the analog sensor output module. On the one hand, it acquires the 24V and 5V voltage analog signals of the product under test and the system itself through the J4 interface. On the other hand, it receives the analog signals (including fixed signals and knob-adjustable signals) fed back by the analog sensor output module. After digitizing these temperature and voltage analog signals, they are synchronously sent to the MCU control module for subsequent analysis.

[0049] After receiving all the digital signals transmitted during the signal sensing phase, the MCU control module initiates the preset control algorithm and logic for processing: First, it filters and denoises the high and low level signals, voltage signals, and PWM signals and performs threshold judgment to verify whether the signal output of the vehicle air conditioning controller under test meets the design standards; at the same time, it parses the interactive data transmitted by the CAN communication module to check the consistency between the remote configuration parameters and the local preset parameters; finally, based on the signal verification results, it generates corresponding control commands, including PWM output adjustment commands, relay on / off commands, status indication commands, etc.

[0050] Based on the core processing results, the MCU control module drives the execution layer module to complete corresponding operations: It generates a PWM wave with a corresponding duty cycle through the PWM output module, which is fed back to the vehicle air conditioning controller under test via the J3 interface to achieve the adjustment and testing of parameters such as air conditioning fan power and compressor speed; it outputs on / off signals through the relay control module, controlling the high and low level output states of pins 1-7 of the J2 interface on one hand, and controlling the backlight power output of pin 8 of the J2 interface on the other hand, while simultaneously controlling the on / off control of the motor forward and reverse rotation detection circuit, thereby completing the start / stop, power switching, and other functional tests of the product under test.

[0051] Local status indicators include LED indicator groups for the button module, which provide real-time feedback on the working status. The LEDs connected to the J9-J11 interfaces correspond to high and low voltage detection, CAN communication, and motor direction detection functions, respectively. When the signal acquisition is normal or the communication is smooth, the corresponding LED is constantly lit; when the signal is abnormal or the communication is interrupted, the LED is off or flashes. Two four-digit LED displays receive MCU control commands through the J5 and J6 interfaces, displaying key parameters such as the current sampled voltage value, PWM wave duty cycle, and test mode in real time, allowing operators to intuitively grasp the test status.

[0052] Remote data interaction includes the CAN communication module establishing a connection with the host computer or external control device through the J3 interface, uploading the test data processed by the MCU (such as level detection results, voltage sampling values, and motor rotation status) to the host computer in real time, and receiving remote parameter configuration commands or test start / stop commands issued by the host computer, realizing remote monitoring and flexible control of the test process and improving the convenience of test operation.

[0053] Configure the parameters according to the corresponding manual for different products. After the parameters are configured, power on the test bench. The test bench will self-check whether the power-on status is normal. After the test is completed, connect the product under test and start further testing. Perform different logic tests by manually clicking the buttons. After the logic test is completed, confirm the product status.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A universal testing system for vehicle air conditioning controllers, characterized in that, The system includes: MCU control module, power supply module, voltage sampling module, indicator button module, high and low level detection module, motor forward and reverse rotation detection module, analog sensor output module, PWM sampling module, CAN communication module and connectors; The power supply module is connected to various system modules and external products for power supply to the system and external output; the MCU control module is connected to various system modules for data processing and command control; the connector is connected to the voltage sampling module, the power supply module, the indicator button module, the high / low level detection module, the motor forward / reverse detection module, the analog sensor output module, the PWM sampling module, and the CAN communication module, and connects various system modules to external products.

2. The testing system according to claim 1, characterized in that, The power supply module is adapted to a 20-28V voltage input. The power supply module has a 24V output terminal and a 5V output terminal. The 24V output terminal and the 5V output terminal are electrically connected to the MCU control module, the voltage sampling module, the analog sensor output module and the connector, respectively.

3. The testing system according to claim 2, characterized in that, The connector includes multiple sub-interfaces, namely J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, and J12, wherein: The J1 interface is electrically connected to the high / low level detection module. The J2 interface is electrically connected to the external power supply output terminal of the motor forward / reverse rotation detection module and the power supply module; The J3 interface is electrically connected to the CAN communication module, the PWM sampling module, the analog sensor output module, and the power supply module. The J4 interface is electrically connected to the voltage sampling module; The J5 and J6 interfaces are electrically connected to the display unit of the indicator button module; The J7 interface is electrically connected to the voltage regulation component of the voltage sampling module; The J8 interface is electrically connected to the button unit of the indicator button module; The J9, J10, and J11 interfaces are electrically connected to the indicator unit of the indicator button module; The J12 interface is electrically connected to the adjustable output component of the analog sensor output module.

4. The testing system according to claim 3, characterized in that, The connector also includes a P1 to P8 high / low detection level signal switching interface, which is used to connect a switch to switch the detection signal. Its PIN1 is grounded, PIN2 is electrically connected to the relay coil terminal, and PIN3 is electrically connected to the power module.

5. The testing system according to claim 3, characterized in that, The analog sensor output module includes a fixed signal output subunit and an adjustable signal output subunit; the fixed signal output subunit is electrically connected to pins 9 to 16 of the J3 interface of the connector and is used to output a fixed analog sensor signal; the adjustable signal output subunit is electrically connected to the J12 interface of the connector, and the adjustable output component connected to the J12 interface is a panel knob component.

6. The testing system according to claim 3, characterized in that, The J4 interface is used to acquire adjustable voltages within the range of 24V and 5V; the J7 interface, through the voltage adjustment component, adjusts the voltage output within the range of 24V and 5V.

7. The testing system according to claim 3, characterized in that, The indicator button module includes an indicator unit, a button unit, and a display unit; the indicator unit is a panel LED light group; the button unit is a panel matrix button; and the display unit includes two four-digit LED digital tubes.

8. The testing system according to claim 3, characterized in that, The motor forward and reverse rotation detection module is electrically connected to pins 11 to 16 of the J2 interface of the connector, and is electrically connected to the positive and negative terminals of the external motor under test and the relay, respectively.

9. The testing system according to claim 3, characterized in that, The CAN communication module is electrically connected to pins 3 to 6 of the J3 interface of the connector and is adapted to connect to the external device interface via the CAN communication line; the PWM sampling module is electrically connected to pins 7 to 8 of the J3 interface of the connector and is used to acquire two PWM input signals.

10. The testing system according to claim 3, characterized in that, The J1 interface pins 1 to 7 and 9 of the connector are the first signal input terminals, which are adapted to the 12V low voltage level signal acquisition terminal; the J1 interface pins 8 and 10 to 16 are the second signal input terminals, which are adapted to the 24V high and low level signal acquisition terminal, and the J1 interface is electrically connected to the corresponding switching switch of the P1 to P8 interfaces of the high and low level detection module.

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