Automatic test system for air conditioner controller

Abstract

The utility model provides an automatic test system for an air conditioner controller, which comprises a main board and a load board, and is characterized in that the main board is provided with a central processing element, a PWM module, an I / O module, an ADC acquisition module, a plurality of first operating pieces and a display screen; the load board is in communication connection and electric connection with the main board and is provided with a power supply control module, a communication protocol module, a main control switch, a direct current motor and an indication module; the load board can be connected with an external power supply, and the load board can be in communication connection with an air conditioner controller to be tested and an upper computer. Compared with the prior art, the automatic test system for the air conditioner controller can be used for automatically testing multiple functions of the air conditioner controller.

Description

Technical Field

[0001] The utility model relates to the field of air-conditioning controller testing devices, in particular to an air-conditioning controller automatic testing system. Background Art

[0002] Automobile air conditioners are in-car electrical appliances used to adjust and control the temperature, humidity, air cleanliness and air flow in the car compartment to the best state, providing a comfortable riding environment for passengers. The control of automobile air conditioners mainly depends on air-conditioning controllers. With the development of automobile air-conditioning technology, the functions of air-conditioning controllers have also increased. In order to ensure the quality of air-conditioning controllers, air-conditioning controllers need to be tested. Currently, the functional test benches for air-conditioning controllers sold on the market are mostly test equipment based on VT boards, LabVIEW software development platforms or NI boards. The above test equipment cannot simulate sensor signals, I / O signals, and there is no simulated motor to simulate the mode motor in the air-conditioning controller. In addition, the above test equipment is expensive, which is not conducive to secondary development and maintenance. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide an automatic test system for an air-conditioning controller, which can automatically test various functions of the air-conditioning controller.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The automatic test system for air-conditioning controller comprises a main board and a load board, wherein the main board is provided with a central processing unit, a PWM module, an I / O module, an ADC acquisition module, a plurality of first operating elements and a display screen; the load board is communicatively and electrically connected with the main board, and is provided with a power control module, a communication protocol module, a main control switch, a DC motor and an indication module; the load board can be connected to an external power supply, and the load board can be communicatively connected with an air-conditioning controller to be tested and a host computer; the host computer sends instructions to the load board, the main board obtains the instructions received by the load board and performs PWM output operations and I / O output operations, and the load board changes the sensor signal thereon after receiving the PWM output operations and the I / O output operations; the air-conditioning controller to be tested detects changes in the sensor signal of the simulated in-vehicle environment on the load board, and the air-conditioning controller to be tested outputs an air-conditioning working instruction; after the load board detects that the air-conditioning controller to be tested outputs the air-conditioning working instruction, the DC motor responds according to the air-conditioning working instruction, and the indication module makes corresponding instructions according to the air-conditioning working instruction; the main board detects the rotation data of the DC motor through the ADC acquisition module, the display screen is used to display the sensor signal and the feedback signal when the DC motor is running in real time, and the sensor output value on the load board can be changed by operating the first operating element.

[0006] Compared with the prior art, the air conditioner controller automatic test system of the utility model has the following beneficial effects:

[0007] (1) The test of the air-conditioning controller includes power management, DID, data storage, IO part, mutually exclusive manipulation, HMI button control, air-conditioning mode switching, voice control, remote control, POPUP display, external temperature correction, compressor control, target evaporator, blow-out port control, rear row IO control, suction port control, blower control, defrost control, cooling fan control, engine start-stop control, negative ion function, compensation air outlet control, evaporator self-drying, ventilation mode, load management function, freezing rear row air-conditioning control, double-layer flow control and display, etc.; the utility model can be used for the automation test of the above-mentioned test of the air-conditioning controller, thereby greatly improving the test efficiency and effectively ensuring the normal development process of the air-conditioning controller;

[0008] (2) The existing air-conditioning controller testing method requires testers to manually perform functional tests, and requires testers to use power supplies, signal power supplies, bus oscilloscopes, multimeters, and motors on the test bench to test one by one according to the test cases. This method has the disadvantages of low efficiency, high missed detection and false detection rate, and high cost. The utility model can be connected to the host computer and the external power supply to access the air-conditioning controller to be tested for functional testing, eliminating the need for manpower access and saving a lot of costs.

[0009] (3) The existing air-conditioning controller test device needs to be equipped with a real air-conditioning motor, a car air sensor, etc. for testing. The utility model can test the air-conditioning controller without the need for external connection of the above accessories, thereby reducing the testing difficulty and testing cost (using the PWM module (PWM output port) of the mainboard to output a high-frequency PWM signal, and converting it into a DC voltage signal through an RC filter circuit, thereby simulating the sensor signal output, automatically controlling the B+ and IG electrical outputs, and providing a sensor type signal to the air-conditioning controller to be tested);

[0010] (4) By adjusting the mainboard (secondary development), the utility model can test different types of air-conditioning controllers to meet different functional test requirements, and can display the operating status of the air-conditioning controller in real time through the display screen, DC motor and indication module (using the DC motor as a simulated motor load, configuring the indication module to distinguish the forward and reverse rotation of the DC motor, and the mainboard detecting the rotation of the DC motor through the ADC acquisition module), so as to intuitively judge the operation of the air-conditioning controller, thereby realizing automated testing;

[0011] (5) The utility model is provided with a PWM module, thereby utilizing PWM to convert DAC output, and the DAC error rate is 1mv, so that the test accuracy of the utility model is relatively high;

[0012] (6) The utility model is composed of a main board and a load board, which has a relatively low cost and is easy to promote and use.

[0013] Furthermore, the display screen is an OLED display screen.

[0014] The OLED display can display sensor signals and motor operation feedback signals in real time through multiple interfaces.

[0015] Furthermore, a plurality of second operating elements are provided on the main board, and the display interface and display content of the display screen can be switched by operating the second operating elements.

[0016] Since the utility model can test various functions of the air-conditioning controller, by setting a display interface of the switchable display screen and a plurality of second operating elements for displaying content, it is convenient for the tester to view the test content and test results.

[0017] Furthermore, the main board is located on the load board, and the main board and the load board are connected via pins and pin sockets.

[0018] The above arrangement facilitates the connection between the main board and the load board, thereby reducing the difficulty of disassembling and connecting the two and saving space.

[0019] Furthermore, the load board is provided with a CAN communication interface and a LIN communication interface; the communication protocol module includes a CAN module and a LIN module; the host computer can send CAN messages and LIN messages to the load board.

[0020] By configuring the CAN communication interface and the LIN communication interface, it is convenient for the host computer to send instructions and monitor message signals.

[0021] Furthermore, the indication module includes a plurality of LED indicator lights, and the LED indicator lights are used to detect whether the high and low side output functions of the air-conditioning controller to be tested exist.

[0022] LED indicators are used to display the presence or absence of high and low side output functions of the air-conditioning controller to be tested, which is intuitive, practical, simple and effective.

[0023] Furthermore, the load board is connected to the air-conditioning controller to be tested via a wiring harness.

[0024] The above-mentioned setting method makes the utility model compatible with different types of air-conditioning controllers. The air-conditioning controller to be tested that is the same type as the preset air-conditioning controller can be directly connected to the load board and tested, and the air-conditioning controller to be tested that is different from the preset air-conditioning controller type can be connected to the load board for testing via an adapter harness or DuPont cable.

[0025] Furthermore, the power control module includes a protection circuit and a power supply circuit.

[0026] The protection circuit can play an overcurrent protection role (the fuse will be disconnected) to prevent the utility model from being damaged during the test process.

[0027] Furthermore, a plurality of main control switches, DC motors and indicator modules are provided correspondingly; and the load board can be communicatively connected with a plurality of air-conditioning controllers to be tested.

[0028] By setting up multiple groups of main control switches, DC motors and indication modules, it is convenient for testers to test multiple air-conditioning controllers to be tested at the same time, thereby improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the connection between the utility model, the host computer and the air-conditioning controller to be tested;

[0030] Figure 2 This is a schematic diagram of the motherboard;

[0031] Figure 3 is a schematic diagram of the load board.

[0032] Description of labels:

[0033] Main board 1, central processing unit 2, PWM module 3, I / O module 4, ADC acquisition module 5, first operating element 6, second operating element 7, display screen 8, load board 9, power control module 10, communication protocol module 11, main control switch 12, DC motor 13, indication module 14, load element 15, CAN communication interface 16, LIN communication interface 17, wiring harness 18, air conditioning controller 19, host computer 20. DETAILED DESCRIPTION

[0034] The following describes the implementation of the utility model in conjunction with the accompanying drawings:

[0035] See also Figures 1 to 3The air conditioner controller automatic test system of this embodiment includes a main board 1 and a load board 9. The main board 1 is provided with a central processing element 2, a PWM module 3, an I / O module 4, an ADC acquisition module 5, a plurality of first operating elements 6 and a display screen 8; the load board 9 is communicatively and electrically connected to the main board 1, and is provided with a power control module 10, a communication protocol module 11, a main control switch 12, a DC motor 13, an indication module 14 and a load element 15; the load board 9 can be connected to an external power supply, and the load board 9 can be communicatively connected to the air conditioner controller 19 to be tested and the host computer 20; the host computer 20 sends instructions to the load board 9, the main board 1 obtains the instructions received by the load board 9 and performs PWM output operations and I / O output operations, and the load board 9 changes the sensor signal thereon after receiving the PWM output operation and the I / O output operation; the air-conditioning controller 19 to be tested detects the change of the sensor signal of the simulated in-vehicle environment on the load board 9, and the air-conditioning controller 19 to be tested outputs the air-conditioning working instruction; after the load board 9 detects that the air-conditioning controller 19 to be tested outputs the air-conditioning working instruction, the DC motor 13 responds according to the air-conditioning working instruction, and the indication module 14 makes a corresponding indication according to the air-conditioning working instruction; the main board 1 detects the rotation data of the DC motor 13 through the ADC acquisition module 5, and the display screen 8 is used to display the sensor signal and the feedback signal of the DC motor 13 when it is running in real time, and the sensor output value on the load board 9 can be changed by operating the first operating member 6.

[0036] The display screen 8 is an OLED display screen.

[0037] The OLED display can display sensor signals and motor operation feedback signals in real time through multiple interfaces.

[0038] A plurality of second operating elements 7 are also provided on the main board 1 , and the display interface and display content of the display screen 8 can be switched by operating the second operating elements 7 .

[0039] Since the utility model can test various functions of the air-conditioning controller 19, by setting a display interface of the switchable display screen 8 and a plurality of second operating elements 7 for displaying contents, it is convenient for the tester to view the test contents and test results.

[0040] The main board 1 is located on the load board 9 , and the main board 1 and the load board 9 are connected via pins (not shown in the figure) and a pin holder (not shown in the figure).

[0041] The above arrangement facilitates the connection between the main board 1 and the load board 9, thereby reducing the difficulty of disassembling and connecting the two and saving space.

[0042] The load board 9 is provided with a CAN communication interface 16 and a LIN communication interface 17 ; the communication protocol module 11 includes a CAN module and a LIN module; the host computer 20 can send CAN messages and LIN messages to the load board 9 .

[0043] By configuring the CAN communication interface 16 and the LIN communication interface 17, it is convenient for the host computer 20 to send instructions and monitor message signals.

[0044] The indicator module 14 includes a plurality of LED indicator lights, which are used to detect whether the high-side and low-side output functions of the air-conditioning controller 19 to be tested exist.

[0045] Using LED indicator lights to display the presence or absence of high and low side output functions of the air-conditioning controller 19 to be tested is intuitive, practical, simple and effective.

[0046] The load board 9 is connected to the air conditioning controller 19 to be tested via a wiring harness 18 .

[0047] The above-mentioned setting method makes the utility model compatible with different types of air-conditioning controllers 19. The air-conditioning controller 19 to be tested that is the same type as the preset air-conditioning controller 19 can be directly connected to the load board 9 and tested. The air-conditioning controller 19 to be tested that is different from the preset air-conditioning controller 19 can be connected to the load board 9 through the adapter harness 18 or DuPont line for testing.

[0048] The power control module 10 includes a protection circuit (not shown in the figure) and a power supply circuit (not shown in the figure).

[0049] The protection circuit can play an overcurrent protection role (the fuse will be disconnected) to prevent the utility model from being damaged during the test process.

[0050] A plurality of main control switches 12, DC motors 13 and indicator modules 14 are provided correspondingly; and the load board 9 can be communicatively connected with a plurality of air-conditioning controllers 19 to be tested.

[0051] By providing a plurality of sets of main control switches 12, DC motors 13 and indication modules 14, it is convenient for testers to test a plurality of air-conditioning controllers 19 to be tested at the same time, thereby improving the test efficiency.

[0052] In this embodiment, the external power supply is 12V DC.

[0053] The working principle of this utility model:

[0054] After the 12V DC is connected to the load board 9, the protection circuit plays a circuit protection role. The main control switch 12 is pressed, and the 12V power is supplied to the main board 1 through the pin, and the main board 1 starts to work. The second operating member 7 changes the different display interfaces of the display screen 8. The interface can update the collected ADC value once every 100ms and display it on the screen, so as to view the program execution results in real time.

[0055] The host computer 20 sends CAN messages through the CAN card. The CAN messages are connected to the load board 9 through the CAN line, and then connected to the main board 1 through the pins. After receiving the CAN messages, the main board 1 starts to perform PWM output (analog DAC), I / O output and other operations (the CAN message is the instruction that the tester wants the main board 1 to work). The above operations are connected to the load board 9 through the pins, and the load board 9 transmits these signals to the device under test through the circuit, so that the host computer 20 controls the signals in the load element 15 of the load board 9.

[0056] The host computer 20 changes the signal to provide a simulated vehicle environment (sensor signal, power supply, etc.) to the air-conditioning controller 19 to be tested. After the air-conditioning controller 19 to be tested detects the signal change in the load element 15, it starts to control the rotation of the DC motor 13, the high and low side outputs, etc., and the DC motor 13 and the indication module 14 in the load board 9 respond accordingly.

[0057] The tester determines the execution status of the air-conditioning controller 19 to be tested by checking whether the DC motor 13 is rotating or not and whether the indicator module 14 is on or off. Alternatively, the tester determines the motor rotation status by collecting the feedback voltage of the load board 9 through the main board 1 to obtain the rotation status of the DC motor 13.

[0058] Compared with the prior art, the air conditioner controller automatic test system of the utility model has the following beneficial effects:

[0059] (1) The test of the air-conditioning controller includes power management, DID, data storage, IO part, mutually exclusive manipulation, HMI button control, air-conditioning mode switching, voice control, remote control, POPUP display, external temperature correction, compressor control, target evaporator, blow-out port control, rear row IO control, suction port control, blower control, defrost control, cooling fan control, engine start-stop control, negative ion function, compensation air outlet control, evaporator self-drying, ventilation mode, load management function, freezing rear row air-conditioning control, double-layer flow control and display, etc.; the utility model can be used for the automation test of the above-mentioned test of the air-conditioning controller 19, thereby greatly improving the test efficiency and effectively ensuring the normal development process of the air-conditioning controller 19;

[0060] (2) The existing air-conditioning controller testing method requires the tester to manually perform functional testing, and requires the tester to use power supply, signal power supply, bus oscilloscope, multimeter and motor to test one by one according to the test case on the test bench, which has the disadvantages of low efficiency, high missed detection and false detection rate and high cost. The utility model can be connected to the upper computer 20 and the external power supply to access the air-conditioning controller 19 to be tested for functional testing, eliminating the need for manpower access and saving a lot of cost;

[0061] (3) The existing air-conditioning controller 19 test device needs to be equipped with a real air-conditioning motor, a car air sensor, etc. for testing. The utility model can test the air-conditioning controller 19 without the above accessories, thereby reducing the testing difficulty and testing cost (using the PWM module 3 (PWM output port) of the mainboard 1 to output a high-frequency PWM signal, and converting it into a DC voltage signal through an RC filter circuit, thereby simulating the sensor signal output, automatically controlling the B+ and IG electrical outputs, and providing a sensor type signal to the air-conditioning controller 19 to be tested);

[0062] (4) By adjusting the mainboard 1 (secondary development), the utility model can test different types of air-conditioning controllers 19 to meet different functional test requirements, and can display the operating status of the air-conditioning controller 19 in real time through the display screen 8, the DC motor 13 and the indication module 14 (using the DC motor 13 as a simulated motor load, configuring the indication module 14 to distinguish the forward and reverse rotation of the DC motor 13, and at the same time, the mainboard 1 detects the rotation of the DC motor 13 through the ADC acquisition module 5), so as to intuitively judge the operation of the air-conditioning controller 19, thereby realizing automated testing;

[0063] (5) The utility model is provided with a PWM module 3, thereby utilizing PWM to convert DAC output, and the DAC error rate is 1mv, so that the test accuracy of the utility model is relatively high;

[0064] (6) The utility model is composed of a main board 1 and a load board 9, which has a relatively low cost and is easy to promote and use.

[0065] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. The air conditioning controller automatic test system is characterized by: include: A main board, which is provided with a central processing unit, a PWM module, an I / O module, an ADC acquisition module, a plurality of first operating elements and a display screen; The load board is connected to the main board in communication and electrical connection, and is provided with a power control module, a communication protocol module, a main control switch, a DC motor and an indication module; the load board can be connected to an external power supply, and the load board can be connected to the air conditioner controller to be tested and the host computer in communication; The host computer sends instructions to the load board, the main board obtains the instructions received by the load board and executes PWM output operations and I / O output operations, and the load board changes the sensor signal thereon after receiving the PWM output operations and I / O output operations; the air-conditioning controller to be tested detects changes in the sensor signal of the simulated in-vehicle environment on the load board, and the air-conditioning controller to be tested outputs an air-conditioning working instruction; after the load board detects that the air-conditioning controller to be tested outputs the air-conditioning working instruction, the DC motor responds according to the air-conditioning working instruction, and the indication module makes corresponding instructions according to the air-conditioning working instruction; the main board detects the rotation data of the DC motor through the ADC acquisition module, and the display screen is used to display the sensor signal and the feedback signal when the DC motor is running in real time, and the sensor output value on the load board can be changed by operating the first operating member.

2. The air conditioning controller automatic test system according to claim 1, characterized in that: The display screen is an OLED display screen.

3. The air conditioning controller automatic test system according to claim 1, characterized in that: The mainboard is also provided with a plurality of second operating elements, and the display interface and display content of the display screen can be switched by operating the second operating elements.

4. The air conditioning controller automatic test system according to claim 1, characterized in that: The main board is located on the load board, and the main board and the load board are connected through pins and pin holders.

5. The air conditioning controller automatic test system according to claim 1, characterized in that: The load board is equipped with CAN communication interface and LIN communication interface; The communication protocol module includes CAN module and LIN module; The host computer can send CAN messages and LIN messages to the load board.

6. The air conditioning controller automatic test system according to claim 1, characterized in that: The indication module includes a plurality of LED indicator lights, and the LED indicator lights are used to detect whether the high and low side output functions of the air conditioner controller to be tested exist.

7. The air conditioning controller automatic test system according to claim 1, characterized in that: The load board is connected to the air conditioning controller to be tested via a wiring harness.

8. The air conditioning controller automatic test system according to claim 1, characterized in that: The power control module includes a protection circuit and a power supply circuit.

9. The air conditioning controller automatic test system according to claim 1, characterized in that: There are several corresponding main control switches, DC motors and indicator modules; The load board can be communicatively connected with a plurality of air-conditioning controllers to be tested.

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