A vehicle air conditioner controller test system

Abstract

The utility model relates to air conditioning test technical field especially, it relates to a kind of vehicle air conditioner controller test system, system includes main control panel, the main control panel is connected with MCU control module, power module, power voltage signal acquisition module, actuator voltage signal acquisition module, alarm indication module, CAN communication module and analog sensor signal output module respectively;Adapter plate, the adapter plate is respectively connected with power module, power voltage signal acquisition module, actuator voltage signal acquisition module, CAN communication module, analog sensor signal output module, actuator test module, air blower test module and the controller of being measured butt joint.Through the structure that main control panel integrates multiple modules, adapter plate adapts special component, integrated design replaces scattered equipment, reduces artificial wiring step, avoids wiring error, simplifies operation procedure.

Description

Technical Field

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

[0002] Currently, the testing of automotive air conditioning controllers often involves using separate power simulators, signal acquisition devices, and CAN communication debuggers to measure different parameters. This involves numerous manual wiring and switching steps, which are prone to wiring errors and thus affect the accuracy of test results. Automotive air conditioning controllers operate on a wide voltage range of 8-16V (vehicle-grade DC) and require matching with specialized components such as blowers, heating / cooling actuators, mode actuators, and fresh air actuators. Existing general-purpose testing equipment struggles to accurately simulate the voltage fluctuations of the vehicle battery and cannot adapt to the load characteristics of these specialized actuators, making it impossible to reproduce the controller's actual operating state after installation in a vehicle.

[0003] In traditional testing, test results are typically presented as numerical values ​​on instruments, lacking specific fault codes or visual indicators for automotive air conditioning controllers. Testers must meticulously verify each test data point to determine the controller's fault type, a time-consuming process. Furthermore, the connector specifications and actuator interface definitions differ between automotive air conditioning controllers of different models. Existing testing equipment lacks dedicated adapter structures, requiring frequent changes to adapter fixtures when testing controllers for different models, resulting in low testing efficiency in mass production scenarios. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vehicle air conditioning controller testing system.

[0005] This utility model is achieved through the following technical solution: a vehicle air conditioning controller testing system, including a main control board, which is connected to an MCU control module, a power supply module, a power supply voltage signal acquisition module, an actuator voltage signal acquisition module, an alarm indication module, a CAN communication module, and an analog sensor signal output module; and an adapter board, which is connected to the power supply module, the power supply voltage signal acquisition module, the actuator voltage signal acquisition module, the CAN communication module, the analog sensor signal output module, the actuator testing module, the blower testing module, and the controller under test.

[0006] Furthermore, the power module operates at DC 8-16V and is equipped with a P1 interface. Pins 1-2 of the P1 interface output the BAT power supply signal simulating a battery, and pins 4-5 output the power supply signal simulating a power source.

[0007] Furthermore, the power supply voltage signal acquisition module is connected to the adapter board via the P2 interface to acquire the reserved power supply signal output by the 7P connector of the controller under test.

[0008] Furthermore, the actuator voltage signal acquisition module includes a P6 interface and a P7 interface; the P6 interface is used to acquire the four negative control signals of the vehicle air conditioner stepper motor; the P7 interface is used to acquire the power signal of the vehicle air conditioner stepper motor.

[0009] Furthermore, the alarm indication module includes an LED indicator group, a three-digit digital tube, and a push-button switch, and is connected to the main control board via a J2 interface and a P5 interface; the LED indicator group is used to display test results and status indications; the three-digit digital tube is used to display the corresponding fault code; and the push-button switch is used to switch between manual and automatic test modes.

[0010] Furthermore, the CAN communication module is configured with a P8 interface, which includes CANL and CANH pins to adapt to the CAN bus communication protocol of the vehicle air conditioning controller.

[0011] Furthermore, the analog sensor signal output module is connected to the adapter board via a P4 interface to output analog indoor fan voltage signals, analog room temperature sensor signals, and analog voltage signals to the controller under test, while also supporting the acquisition of PWM signals.

[0012] Furthermore, the adapter board is equipped with a dedicated interface group; wherein the P36 interface connects to the heating and cooling actuator of the vehicle air conditioner, the P37 interface connects to the mode actuator, the P38 interface connects to the fresh air actuator, and the P2 interface connects to the blower test module, and the external plug-in interface of the adapter board matches the connector model of the vehicle air conditioner controller under test.

[0013] Furthermore, the blower test module is linked to the power module through the P2 interface of the adapter board, and can output an adjustable voltage of DC8-16V to drive and test different speeds of the vehicle air conditioner blower.

[0014] Furthermore, the system also includes a reserved serial port, a 5V power supply interface, and uses USART1.

[0015] The beneficial effects of this utility model are as follows: By integrating multiple modules into the main control board and using adapter boards to adapt to dedicated components, the integrated design replaces scattered equipment, reducing manual wiring steps, avoiding wiring errors, and simplifying the operation process; it accurately adapts to the onboard DC8-16V wide-voltage power supply and the load characteristics of dedicated actuators, replicating the actual working state of the controller after installation in the vehicle, thus improving test accuracy; dedicated fault codes combined with visual indicators allow for quick fault location without the need for item-by-item verification, shortening troubleshooting time; the adapter board's dedicated interface adapts to controller connectors of different vehicle models, reducing the frequency of tooling changes and improving batch testing efficiency. Overall, it achieves high efficiency, accuracy, and convenience in testing automotive air conditioning controllers. Attached Figure Description

[0016] Figure 1 This is a structural block diagram of the vehicle air conditioning controller test system of 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 of the power supply voltage signal acquisition module of this application; Figure 5 This is a circuit diagram of the analog sensor signal output module of this application; Figure 6 This is a circuit diagram of the actuator voltage signal acquisition module of this application. Figure 7 This is a circuit diagram of the CAN communication module of this application; Figure 8 This is a circuit diagram of the adapter board interface of this application; Figure 9 A circuit diagram showing the reserved serial port for this application; Figure 10 This is a flowchart of the testing system for the vehicle air conditioning controller in this application. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] This utility model discloses a vehicle air conditioning controller testing system, which uses a main control board as the control center and an adapter board as the signal relay component, and combines functional modules to realize testing functions. Figure 1 The following are included: The main control board is connected to the MCU control module, power supply module, power supply voltage signal acquisition module, actuator voltage signal acquisition module, alarm indication module, CAN communication module and analog sensor signal output module.

[0020] The main control board is the core control unit of the system. Its integrated MCU control module is the core of data processing and instruction scheduling, responsible for signal acquisition, processing, output, and logic flow processing. It also connects to the following functional modules: The power module (power supply and power output module) corresponds to interface P1, which converts the externally supplied DC8-16V power signal into a power signal for internal use and external output.

[0021] The power supply voltage signal acquisition module corresponds to interface P2. It acquires the power supply voltage signal of the controller under test through the AD signal acquisition function. One channel of the power supply voltage signal acquisition module samples the power supply signal to confirm that the voltage is correct. The other two channels sample the limit voltage signal of the product output to confirm the product output voltage signal parameters.

[0022] The actuator voltage signal acquisition module corresponds to interfaces P6 and P7, which acquire the voltage signal of the vehicle air conditioning actuator, that is, the positive voltage signal and negative control signal output by the product to control the actuator, so as to determine whether the product output is normal.

[0023] The alarm indicator module (LED indicator / alarm / button module) is connected to the main controller J2 and indicator J1, and the main controller P5 and indicator P1 through the interface. It is used to indicate the functional status of the test bench and the product, and to start and stop the test, realize test status display, fault alarm and test mode switching.

[0024] The CAN communication module corresponds to interface P8, which completes the CAN bus data interaction with the controller under test.

[0025] The analog sensor signal output module corresponds to interface P4, which outputs analog sensor signals (including DAC / PWM signals), providing indoor temperature sensor signals, analog return air fan voltage signals, and analog voltage signals used by the product's sensors.

[0026] The reserved serial port module corresponds to interface P9, which is used for system function expansion.

[0027] The adapter board is connected to the power module, power voltage signal acquisition module, actuator voltage signal acquisition module, CAN communication module, analog sensor signal output module, actuator test module, blower test module and the controller under test.

[0028] The adapter board is a signal relay component. One end connects to the various functional modules of the main control board via a matching interface, and the other end connects the test component to the controller under test. It connects to the blower test module via the P2 interface and to the actuator test module (corresponding to the heating / cooling, mode, and fresh air actuators) via the P36-P38 interfaces. It also has an external connector for direct connection to the vehicle air conditioning controller under test. It enables power transmission, signal acquisition, and command interaction between the various modules of the main control board and the controller under test, actuator / blower test module.

[0029] like Figure 2 As shown, the MCU control module uses the STM32F103R8T6 microcontroller as its core hardware carrier, along with the basic circuitry and the interaction links between the system functional modules. It serves as the data processing and instruction scheduling center of the test system. The MCU's P3 interface is the MCU test interface (SW), which connects to the programmer. The interface pins are: 1 (GND) Ground, GND pin is common ground; 2 (NRST / Reset) Reset, connect to the reset pin, short to ground for 3 seconds while powered on when the program needs to be cleared; 3 (VCC) Power supply (3.3V), connect to the 3.3V pin; 4 (JTCK-SWCLK) Clock line, connect to the SWCLK pin to provide the download clock; 5 (JTMS-SWDIO) Data line, connect to the SWDIO pin for download data transmission.

[0030] The basic circuitry includes: a power supply circuit, which provides a stable operating voltage for the core microcontroller, ensuring the reliability of the chip's power supply in a wide-voltage automotive environment; a reset circuit, which enables automatic reset after the system is powered on, and also supports manual reset operation to ensure restart and recovery in case of module malfunction; and a clock circuit, which provides a stable operating clock signal for the microcontroller through an external oscillation component, supporting the timing coordination of various functional modules.

[0031] The MCU control module interfaces with various functional modules of the test system through hardware links to achieve data interaction and command control: it interfaces with the CAN communication module to complete CAN bus data transmission with the vehicle air conditioning controller under test; it interfaces with the reserved serial port module to provide an expansion interface to support subsequent upgrades of system functions; it interfaces with the power supply voltage and actuator voltage signal acquisition module to receive and process the acquired data of the two types of voltage signals; it interfaces with the analog sensor signal output module to output analog signals such as PWM and DAC to simulate the sensor input of the vehicle air conditioning; and it interfaces with the alarm indication module to drive status indication components (such as LEDs and digital tubes) and receive button operation signals to switch test modes.

[0032] like Figure 3 As shown, the power module operates at DC 8-16V and is equipped with a P1 interface. Pins 1-2 of the P1 interface output the BAT power supply signal simulating a battery, and pins 4-5 output the power supply signal simulating a power source.

[0033] The basic circuit includes: an input and protection unit, where the module input is equipped with overcurrent and reverse connection protection components (such as fuses and diodes as shown in the figure) to avoid the risks of reverse connection and overcurrent when connecting to the vehicle power supply, ensuring the power safety of the module and downstream equipment; and a voltage regulation component, where the wide-voltage input signal is processed by a high-precision voltage regulator unit and converted into a stable power supply signal, ensuring the accuracy and stability of the output voltage and matching the actual power consumption characteristics of the vehicle air conditioning controller. This module connects directly to the main control board and also interfaces with an adapter board via the P1 interface, ultimately providing the tested vehicle air conditioning controller with a power supply that conforms to the vehicle scenario, supporting the controller in reproducing the actual power consumption environment after installation in a vehicle.

[0034] like Figure 4 As shown, the power supply voltage signal acquisition module connects to the adapter board via the P2 interface to acquire the reserved power signal output from the 7-pin connector of the controller under test. The P2 interface is used for analog signal acquisition. P2(1-2) acquires two reserved power signals output from the 7-pin connector. Pin 1 (PowerOut1) - Signal Acquisition: Acquires the N / A (Reserved PWM output) signal, corresponding to pin 2 of the 7-pin connector; Pin 2 (PowerOut2) - Signal Acquisition: Acquires the N / A (Reserved 0V / 24V / High Resistance Output) signal, corresponding to pin 7 of the 7-pin connector.

[0035] The power supply voltage signal acquisition module includes a signal conditioning unit composed of resistors and capacitors. This unit filters and regulates the acquired reserved power supply signal to ensure signal stability and accuracy, preventing interference signals from affecting subsequent data processing. This module connects directly to the main control board. The conditioned power signal is transmitted to the MCU control module on the main control board, where the MCU analyzes the signal parameters to determine whether the power output of the controller under test meets the vehicle operating requirements.

[0036] like Figure 5 As shown, the analog sensor signal output module interfaces with the adapter board via the P4 interface to output analog indoor fan voltage signals, analog room temperature sensor signals, and analog voltage signals to the controller under test, while also supporting PWM signal acquisition. The P4 interface is used for analog signal output and acquisition. P4 interface pins: P4(3-4) analog signal output, P4-3 analog indoor fan voltage output (IncarDiag), P4-4 analog room temperature sensor output signal (IncarTemp); P4-1, voltage signal output, PWM signal acquisition, N / A (Reserved PWM output) - N / A (Reserved PWM output).

[0037] The analog sensor signal output module includes three dedicated signal output branches, with the LM2904 operational amplifier as the core, and a signal conditioning circuit composed of resistors and capacitors: The analog indoor fan voltage branch receives the DAC_Incar signal output from the main control board, and after conditioning by operational amplifier U5A and resistors and capacitors, outputs the analog indoor fan voltage signal (IncarDiag); the analog room temperature sensor branch receives the DAC_IncarTemp signal output from the main control board, and after conditioning by operational amplifier U5B and resistors and capacitors, outputs the analog room temperature sensor signal (IncarTemp); the PWM to voltage branch receives the PWM_Powerin signal output from the test bench, and after conversion and conditioning by operational amplifier U7A and resistors and capacitors, outputs the corresponding voltage signal (Powerin).

[0038] The module is equipped with a P4 interface (HX2.54-4Pin connector), which interfaces with the adapter board to transmit the three analog signals to the vehicle air conditioning controller under test. The input signals of each branch come from the MCU control module of the main control board, and the MCU schedules the output of the corresponding raw signals. This module supports the controller under test to complete functional response testing by simulating sensor inputs in an in-vehicle scenario.

[0039] like Figure 6As shown, the actuator voltage signal acquisition module includes a P6 interface and a P7 interface. The P6 interface is used to acquire the four negative control signals of the automotive air conditioning stepper motor; the P7 interface is used to acquire the power supply signals of the automotive air conditioning stepper motor. The P6 and P7 interfaces are used for actuator signal acquisition. The interface pins are: P6 Actuator Negative Control Signal Acquisition, acquiring the four negative control signals of the stepper motor (0V valid); P7 Actuator Power Supply Signal Acquisition, acquiring the power supply signals of the three stepper motors (normally greater than 10V valid, but also affected by power supply).

[0040] The actuator voltage signal acquisition module is a functional unit that acquires the actuator drive signals of the tested vehicle air conditioning controller to determine the actuator drive status. The module includes two types of acquisition branches corresponding to the core drive signals of the actuator: an actuator power supply acquisition branch, which acquires the operating voltage of actuators such as those for heating / cooling, mode control, and fresh air intake; and an actuator load control signal acquisition branch, which acquires the corresponding voltage signals of multiple load control drive signals from the stepper motor. The signal conditioning circuit includes a filter and conditioning circuit composed of resistors and capacitors for each acquisition branch to filter and stabilize the acquired actuator voltage signals, eliminating interference signals and ensuring the stability and accuracy of the acquired data.

[0041] The module connects to the adapter board via P6 and P7 interfaces to obtain the power supply and load control signals of the actuator of the controller under test. After the conditioned signal is processed by the ADC detection circuit, it is transmitted to the MCU control module of the main control board. The MCU analyzes the signal parameters and determines whether the actuator drive meets the working standards of automotive air conditioning.

[0042] The alarm indication module includes an LED indicator group, a three-digit digital tube, and a push-button switch, and is connected to the main control board via a J2 interface and a P5 interface; the LED indicator group is used to display test results and status indication; the three-digit digital tube is used to display the corresponding fault code; and the push-button switch is used to switch between manual and automatic test modes.

[0043] J2 and P5 are used to receive status indications. The interface pins are as follows: J2 (1-7) is connected to the control terminal of the three-digit LED display, J2 (18-20) is connected to the common terminal of the three-digit LED display for fault code display; J2 (8-10) and P5 (1-5) are connected to LED indicator lights, J2-11 is connected to the common terminal of the power indicator light and connected to the LED indicator light for test results and status indication; J2 (12-13) is connected to the push button switch, and J2-14 is grounded for manual setting of automatic or manual operation.

[0044] like Figure 7As shown, the CAN communication module is equipped with a P8 interface, which includes CANL and CANH pins and is compatible with the CAN bus communication protocol of the vehicle air conditioning controller.

[0045] The module uses the TJA1055T chip as the CAN transceiver core, and the supporting peripheral circuits ensure communication stability: the power supply circuit is connected to +5V power supply, and the power supply is stabilized with resistors and capacitors; the isolation and protection circuit is equipped with transformers, transistors and filter capacitors, which can reduce electromagnetic interference in the vehicle environment and improve the anti-interference capability of the communication link; the signal matching circuit matches the CAN bus impedance to ensure signal transmission quality.

[0046] The module is configured with a P8 interface (HX2.54-4Pin connector), which is used to connect to the adapter board and finally to the CAN bus port of the vehicle air conditioning controller under test. At the same time, the module connects to the MCU control module of the main control board through CAN TX, CAN RX and other pins to realize the data transmission and reception link.

[0047] It supports the vehicle CAN bus communication protocol and is responsible for the transmission of instructions and status data between the main control board and the controller under test. It is the communication hub for the test system to realize the automatic test process. Its anti-interference design can reproduce the communication scenario in the vehicle environment and ensure the authenticity of the test.

[0048] like Figure 8 As shown, the adapter board is equipped with a dedicated interface group; among which, the P36 interface connects to the heating and cooling actuator of the vehicle air conditioner, the P37 interface connects to the mode actuator, the P38 interface connects to the fresh air actuator, and the P2 interface connects to the blower test module, and the external plug-in interface of the adapter board matches the connector model of the vehicle air conditioner controller under test.

[0049] The adapter board, as a core component for signal relay between the main control board and external controllers, actuators, and fan boards under test, integrates multiple functional interfaces. The specific implementation structure and function of each interface are as follows: The pin definitions of the power interface P1 correspond exactly to the P1 interface of the main control board power module. Pins 1-2 are the BAT power supply pins for simulating the vehicle battery, and pins 4-5 are the power supply pins for simulating the vehicle power supply. In practical applications, one end of this interface is directly connected to the P1 interface of the main control board through 2.54mm pitch DuPont wires to draw power, and the other end is led out through a terminal block fixed with screws to provide DC8-16V vehicle-mounted simulated power supply to the external controller and actuator under test, meeting the power requirements of the device under test.

[0050] The CAN interface P8 pins include CANL, CANH signal pins and a ground pin. The pin definitions are fully matched with the P8 interface of the main control board's CAN communication module. One end of this interface is connected to the signal output terminal of the main control board's CAN communication module via a shielded cable, and the other end is connected to the CAN bus interface of the external controller under test, realizing CAN bus data interaction between the main control board and the controller under test, and adapting to the transmission requirements of the vehicle CAN communication protocol.

[0051] The P6 pin definition of the actuator negative control interface is consistent with the P6 interface of the main control board actuator voltage signal acquisition module, including 4 stepper motor negative control signal pins (0V valid) and a ground pin; one end of this interface is connected to the signal input terminal of the main control board actuator voltage signal acquisition module, and the other end is directly connected to the negative control signal terminal of the external automotive air conditioning actuator through a waterproof terminal, transferring the actuator negative control signal to the main control board for the MCU control module to collect and analyze.

[0052] The actuator power interface P7 pin definition matches the P7 interface of the main control board actuator voltage signal acquisition module, and includes 3 stepper motor power signal pins (normal operating voltage ≥10V); one end of this interface is connected to the main control board actuator voltage signal acquisition module, and the other end is connected to the power input terminal of the external actuator, transferring the actuator power signal to the main control board to realize the acquisition and detection of the actuator power supply status.

[0053] The pin definition of the analog signal acquisition interface P2 is consistent with that of the P2 interface of the main control board power voltage signal acquisition module. One end of this interface is connected to the signal input terminal of the main control board power voltage signal acquisition module, and the other end is connected to the 7P connector of the external controller under test. It acquires the reserved power signal output by the controller under test and transfers the signal to the main control board for AD acquisition and analysis.

[0054] The P4 pin definition of the analog signal output interface matches the P4 interface of the analog sensor signal output module on the main control board. One end of this interface is connected to the signal output terminal of the analog sensor signal output module on the main control board, and the other end is connected to the sensor signal input terminal of the controller under test. It transmits the analog indoor fan voltage signal, room temperature sensor signal, etc. output by the main control board to the controller under test, simulating the signal input of the vehicle sensor.

[0055] The P36 interface for the heating and cooling actuator uses a pluggable spring terminal as the lead-out terminal, which can be directly crimped to the wiring terminal of the vehicle air conditioning heating and cooling actuator. This interface is linked with the actuator negative control interface (P6) and actuator power interface (P7) through the internal circuit of the adapter board. After connecting the heating and cooling actuator, its working status signal can be collected in real time, realizing intuitive indication and testing of the actuator's working status.

[0056] The P37 and P36 interfaces of the mode actuator use the same pluggable spring terminals and are directly connected to the vehicle air conditioning mode actuator; they are connected to the P6 and P7 interfaces through the internal wiring of the adapter board to collect the negative control and power signals of the mode actuator and feed them back to the main control board to determine the actuator drive status.

[0057] The P38 interface of the fresh air actuator is compatible with the wiring specifications of the fresh air actuator. It uses pluggable spring terminals of the same specification to directly connect to the fresh air actuator. The working signal of the actuator is transferred to the main control board through the internal circuit of the adapter board to complete the special test of the fresh air actuator.

[0058] The blower board interface P2 is an independently set HX2.54-4Pin connector on the adapter board (distinguished from the analog signal acquisition interface P2 in physical location), and adopts a lead-out terminal design. One end of this interface connects to the external blower board, and the other end connects to the main control board power module through the internal wiring of the adapter board. It can directly supply power to the blower and acquire its operating signals to realize the special performance testing of the blower.

[0059] The main connector J10 uses a male connector that matches the model of the automotive air conditioning controller under test. It has two core terminals for external connection (power terminal and signal terminal). This interface serves as the core docking port between the controller under test and the adapter board. It can be directly plugged into and plugged into the controller under test to achieve rapid physical and signal connectivity between the test system and the product under test, thereby improving the operational efficiency of batch testing.

[0060] In this embodiment, the adapter board achieves full signal coverage conversion between the main control board and external devices through the differentiated design and precise matching of the above interfaces. All interfaces adopt anti-reverse insertion design to avoid equipment damage due to wiring errors during testing, and adapt to the practical needs of batch testing of automotive air conditioning controllers.

[0061] The blower test module is linked to the power module through the P2 interface of the adapter board, and can output an adjustable voltage of DC8-16V to drive the blower of the vehicle air conditioner at different speeds.

[0062] like Figure 9 As shown, the system also includes a reserved serial port P9, with a 5V power supply interface and uses USART1.

[0063] like Figure 10 As shown, the system's workflow is as follows: Upon power-up, the default power-on indicator light illuminates, indicating the system is ready. The product under test is then placed on the test bench. First, the manual test button is clicked. The test bench cylinder presses the circuit board firmly, activating the power signal output. The operator manually operates and visually inspects the screen and buttons for any issues, while simultaneously testing the blower signal.

[0064] After confirming everything is correct, press the automatic test button. The test bench will activate the CAN communication signal output. Once the CAN communication signal is confirmed to be correct, it will output CAN communication commands and simultaneously output analog sensor signals. The product will perform relevant CAN communication interactions and signal acquisition outputs according to the output logic. The test bench will detect the corresponding actuator output signals and power signals of the product and determine their correctness, indicating the status via indicator lights. After the test process is complete, manually operate the pop-up cylinder to remove the product.

[0065] If an error occurs during automatic testing, you can end the current operation by pressing the manual test button.

[0066] This test bench greatly reduces the operational risks and saves time associated with manual testing. By quickly and efficiently identifying fault codes and indicators, it rapidly confirms product status and improves testing accuracy. Fault codes include: E01 Power failure; E02 CAN communication failure; E03 Fresh air actuator power failure; E04 Mode actuator power failure; E05 Heating / cooling actuator power failure; E06 Actuator negative control 01 fault; E07 Actuator negative control 02 fault; E08 Actuator negative control 03 fault; E09 Actuator negative control 04 fault.

[0067] 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 testing system for an automotive air conditioning controller, characterized in that, The system includes: The main control board is connected to the MCU control module, power supply module, power voltage signal acquisition module, actuator voltage signal acquisition module, alarm indication module, CAN communication module and analog sensor signal output module respectively; The adapter board is connected to the power module, power voltage signal acquisition module, actuator voltage signal acquisition module, CAN communication module, analog sensor signal output module, actuator test module, blower test module and the controller under test.

2. The system according to claim 1, characterized in that, The power module operates at DC 8-16V and is equipped with a P1 interface. Pins 1-2 of the P1 interface output the BAT power supply signal simulating a battery, and pins 4-5 output the power supply signal simulating a power source.

3. The system according to claim 1, characterized in that, The power supply voltage signal acquisition module is connected to the adapter board via the P2 interface and is used to acquire the reserved power supply signal output by the 7P connector of the controller under test.

4. The system according to claim 1, characterized in that, The actuator voltage signal acquisition module includes a P6 interface and a P7 interface; the P6 interface is used to acquire the four negative control signals of the vehicle air conditioner stepper motor; the P7 interface is used to acquire the power signal of the vehicle air conditioner stepper motor.

5. The system according to claim 1, characterized in that, The alarm indication module includes an LED indicator group, a three-digit digital tube, and a push-button switch, and is connected to the main control board via a J2 interface and a P5 interface; the LED indicator group is used to display test results and status indication; the three-digit digital tube is used to display the corresponding fault code; and the push-button switch is used to switch between manual and automatic test modes.

6. The system according to claim 1, characterized in that, The CAN communication module is equipped with a P8 interface, which includes CANL and CANH pins and is compatible with the CAN bus communication protocol of the vehicle air conditioning controller.

7. The system according to claim 6, characterized in that, The analog sensor signal output module connects to the adapter board via a P4 interface and is used to output analog indoor fan voltage signals, analog room temperature sensor signals, and analog voltage signals to the controller under test, while also supporting the acquisition of PWM signals.

8. The system according to claim 1, characterized in that, The adapter board is equipped with a dedicated interface group; among which, the P36 interface connects to the heating and cooling actuator of the vehicle air conditioner, the P37 interface connects to the mode actuator, the P38 interface connects to the fresh air actuator, and the P2 interface connects to the blower test module, and the external plug-in interface of the adapter board matches the connector model of the vehicle air conditioner controller under test.

9. The system according to claim 1, characterized in that, The blower test module is linked to the power module through the P2 interface of the adapter board, and can output an adjustable voltage of DC8-16V to drive the blower of the vehicle air conditioner at different speeds.

10. The system according to any one of claims 1 to 9, characterized in that, The system also includes a reserved serial port, a 5V power supply interface, and uses USART1.

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