Subway train air conditioner board card test platform and method

Abstract

The invention relates to a subway train air conditioner board card test platform and method, the platform is used for a tested board card of each carriage of a subway, and the platform comprises a temperature signal simulator, a simulation condensation fan module, a simulation compressor module, a simulation blower module and a test signal module. The test signal module comprises a simulation standby power supply unit and a simulation time delay unit, and the subway train air conditioner board card test platform is adopted to perform normal state test, board card emergency power-off state test and compressor time delay test on the tested board card to obtain a test result. Compared with the prior art, the system simulates the sequence of a condensation fan, a compressor and an air feeder outside a train in actual work, better detects the performance of a board card in normal work, and tests whether the board card outputs a correct signal or not in case of emergency power failure.

Description

Technical Field

[0001] The present invention relates to an air conditioner board, and more particularly to a test platform and method for an air conditioner board of a subway train. Background Art

[0002] One air conditioner control board is distributed in each carriage of the subway train. The entire rail transit has a relatively large number and a relatively high failure rate. The air conditioner control board of the subway train needs to implement functions such as temperature display, temperature control, compressor delay protection, and fault warning. When repairing the test platform of the air conditioner board of the subway train, the current technology is to remove the board and hand it over to the repair manufacturer for repair. The functions of the removed board during repair cannot be realized on the train through conventional detection, and it often takes several times of repeated testing on the train to repair, which wastes labor costs and reduces work efficiency. The most important part that needs to ensure normal operation in the air conditioner control board is the compressor. The existing technology requires repeated testing on the train, and it is difficult to simulate the actual working environment of the fan, compressor, and blower. It is difficult to obtain accurate results for testing the start-up conditions and sequences, emergency states, and whether the compressor delay protection is normal for the compressor. Summary of the Invention

[0003] The purpose of the present invention is to provide a test platform and method for an air conditioner board of a subway train to overcome the above-mentioned defects existing in the prior art. The platform simulates the normal test, emergency power-off test, and compressor delay protection test of the board through a temperature signal simulator, a simulated condensation fan module, a simulated compressor module, a simulated blower module, and a test signal module.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A test platform for an air conditioner board of a subway train, the platform is used for the board to be tested in each carriage of the subway. The platform includes a temperature signal simulator, a simulated condensation fan module, a simulated compressor module, a simulated blower module, and a test signal module. The test signal module includes a simulated standby power supply unit and a simulated delay unit.

[0006] The output end of the temperature signal simulator is connected to the first input end of the board to be tested.

[0007] The first output end of the board to be tested is connected to one end of the first coil of the first contactor. The second input end of the board to be tested is connected to one end of the first normally open contact of the first contactor. The other end of the first coil of the first contactor and the other end of the first normally open contact of the first contactor are connected to the simulated condensation fan module. The simulated condensation fan module is connected to the second normally open contact of the first contactor. The second normally open contact of the first contactor is connected to the first power supply module.

[0008] The second output terminal of the board under test is connected to one end of the first coil of the second contactor. The third input terminal of the board under test is connected to one end of the first normally open contact of the second contactor. The other end of the first coil of the second contactor and the other end of the first normally open contact of the second contactor are connected to the analog compressor module. The analog compressor module is connected to the second normally open contact of the second contactor. The second normally open contact of the second contactor is connected to the second power supply module.

[0009] The third output terminal of the board under test is connected to one end of the first coil of the third contactor. The fourth input terminal of the board under test is connected to one end of the first normally open contact of the third contactor. The other end of the first coil of the third contactor and the other end of the first normally open contact of the third contactor are connected to the analog blower module. The analog blower module is connected to the second normally open contact of the third contactor. The second normally open contact of the third contactor is connected to the third power supply module.

[0010] The fourth output terminal of the board under test is connected to the input terminal of the test signal module. The fifth input terminal of the board under test is connected to the output terminal of the test signal module.

[0011] Further, diodes are connected in parallel across both ends of the first coil.

[0012] Further, the output terminal of the test signal module is connected to an external host computer.

[0013] Further, the temperature signal simulator includes resistors with different resistance values. One end of the resistors with different resistance values is connected to the power supply, and the other end is used as the output terminal of the temperature signal simulator.

[0014] Further, the output terminal of the analog standby power supply unit is connected to the analog condensing fan module.

[0015] Further, the output terminal of the analog standby power supply unit is connected to the analog compressor module.

[0016] Further, the output terminal of the analog standby power supply unit is connected to the analog blower module.

[0017] Further, the output terminal of the analog delay unit is connected to the output terminal of the test signal module and is connected to the fifth input terminal of the board under test.

[0018] Further, the input terminal of the analog delay unit is connected to the input terminal of the test signal module and is connected to the fourth output terminal of the board under test.

[0019] On the other hand, the present invention provides a method for testing a subway train air-conditioning board, using the above-mentioned subway train air-conditioning board test platform. The method includes the following steps:

[0020] S1. The temperature signal simulator outputs a temperature simulation signal to the board under test. The board under test determines whether to adjust the air conditioner temperature based on the temperature simulation signal. If not, the temperature signal simulator continues to output the temperature simulation signal. If so, execute S2;

[0021] S2. The first coil of the first contactor receives the high-level signal sent by the board under test. The first normally open end and the second normally open end of the first contactor close. After the simulated condensing fan module receives the voltage signal of the first power supply module and the signal of the first coil of the first contactor, the simulated condensing fan module sends a first feedback signal to the board under test through the closed first normally open end of the first contactor. After the board under test obtains the first feedback signal, it generates a condensing fan test signal and executes S3;

[0022] S3. The first coil of the second contactor receives the high-level signal sent by the board under test. The first normally open end and the second normally open end of the second contactor close. After the simulated compressor module receives the voltage signal of the second power supply module and the signal of the first coil of the second contactor, the simulated compressor module sends a second feedback signal to the board under test through the closed first normally open end of the second contactor. After the board under test obtains the second feedback signal, it generates a compressor test signal and executes S4;

[0023] S4. The first coil of the third contactor receives the high-level signal sent by the board under test. The first normally open end and the second normally open end of the third contactor close. After the simulated blower module receives the voltage signal of the third power supply module and the signal of the first coil of the third contactor, the simulated blower module sends a third feedback signal to the board under test through the closed first normally open end of the third contactor. After the board under test obtains the third feedback signal, it generates a blower test signal and executes S5;

[0024] S5. The test signal module detects the temperature simulation signal, the first feedback signal, the second feedback signal, and the third feedback signal received by the board under test, as well as the condensing fan test signal, the compressor test signal, and the blower test signal generated by the board under test, and determines whether the logical relationship between the signals received and sent by the board under test is correct to obtain the normal state test result of the board and execute S6;

[0025] S6. The analog standby power supply unit of the test signal module sends an emergency signal to the board under test, and determines whether the analog standby power supply unit of the test signal module receives the emergency power start signal fed back by the board under test to obtain the emergency power-off state test result of the board and execute S7;

[0026] S7. The analog delay unit of the test signal module sends a delay signal to the board under test, determines whether the analog delay unit of the test signal module receives the waiting signal fed back by the board under test, and determines whether the compressor test signal generated in S3 includes the compressor start signal sent to other boards, so as to obtain the compressor delay test result;

[0027] S8. Obtain the board test result by integrating the normal test result of the board, the test result of the board's emergency power-off state, and the compressor delay test result.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention adopts a test platform including a temperature signal simulator, an analog condensing fan module, an analog compressor module, an analog blower module, and a test signal module, and sequentially tests the board based on the test platform. During the test, the working sequences of the condensing fan, compressor, and blower outside the train in actual work are simulated, which better detects the performance of the board under normal working conditions, can detect the operating state of the board during normal working, detects all faults during normal working at one time, and simultaneously tests whether the board outputs the correct signal in the case of emergency power-off.

[0030] (2) Since there are compressors on each train, when the compressors start simultaneously, the consumed voltage is too large, and compressor delay protection is required. By detecting the working conditions of the board under test when sending the compressor start signal and receiving the delay signal through the analog delay unit, the detection of the compressor delay protection function of the board is realized. Description of the Drawings

[0031] Figure 1 is a structural schematic diagram of the present invention;

[0032] Figure 2 is a circuit diagram of the condensing fan part of the present invention;

[0033] Figure 3 is a circuit diagram of the compressor part of the present invention;

[0034] Figure 4 is a circuit diagram of the blower part of the present invention;

[0035] In the figure, 1 is the board under test, 2 is the temperature signal simulator, 3 is the simulated condensation fan module, 41 is the first coil of the first contactor, 42 is the second normally open end of the first contactor, 43 is the first normally open end of the first contactor, 5 is the first power supply module, 6 is the simulated compressor module, 71 is the first coil of the second contactor, 72 is the second normally open end of the second contactor, 73 is the first normally open end of the second contactor, 8 is the second power supply module, 9 is the simulated blower module, 101 is the first coil of the third contactor, 102 is the second normally open end of the third contactor, 103 is the first normally open end of the third contactor, 11 is the third power supply module, and 12 is the test signal module. Detailed implementation manner

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives the detailed implementation manner and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0037] The present invention provides a test platform for subway train air-conditioning boards, and the structure diagram of the platform is as Figure 1 shown. The platform is used for the board under test 1 in each carriage of the subway. The platform includes a temperature signal simulator 2, a simulated condensation fan module 3, a simulated compressor module 6, a simulated blower module 9, and a test signal module 12. The test signal module 12 includes a simulated standby power supply unit and a simulated delay unit.

[0038] The output end of the temperature signal simulator 2 is connected to the first input end of the board under test 1.

[0039] The circuit diagram of the condensation fan of the platform is as Figure 2 shown. One end of the first output end of the board under test 1 is connected to one end of the first coil 41 of the first contactor. One end of the second input end of the board under test 1 is connected to one end of the first normally open end 43 of the first contactor. The other end of the first coil 41 of the first contactor and the other end of the first normally open end 43 of the first contactor are connected to the simulated condensation fan module 3. The simulated condensation fan module 3 is connected to the second normally open end 42 of the first contactor, and the second normally open end 42 of the first contactor is connected to the first power supply module 5. Figure 2 In it, K23 is the first contactor, M3 and M4 are the simulated condensation fan module 3, and FPC24_KT95A is the board under test 1. F23 is an air switch for protecting the circuit.

[0040] The circuit diagram of the compressor part of the platform is as Figure 3As shown in the figure. The second output terminal of the DUT board 1 is connected to one end of the first coil 71 of the second contactor. The third input terminal of the DUT board 1 is connected to one end of the first normally open contact 73 of the second contactor. The other end of the first coil 71 of the second contactor and the other end of the first normally open contact 73 of the second contactor are connected to the analog compressor module 6. The analog compressor module 6 is connected to the second normally open contact 72 of the second contactor. The second normally open contact 72 of the second contactor is connected to the second power supply module 8. Figure 3 In the figure, K21 is the second contactor, M6 is the analog compressor module. F21 is the air switch, which is used to protect the circuit.

[0041] The circuit diagram of the blower part of the platform is as Figure 4 shown in the figure. The third output terminal of the DUT board 1 is connected to one end of the first coil 101 of the third contactor. The fourth input terminal of the DUT board 1 is connected to one end of the first normally open contact 103 of the third contactor. The other end of the first coil 101 of the third contactor and the other end of the first normally open contact 103 of the third contactor are connected to the analog blower module 9. The analog blower module 9 is connected to the second normally open contact 102 of the third contactor. The second normally open contact 102 of the third contactor is connected to the third power supply module 11. K14 is the third contactor, M7 and M8 are the analog blower modules. F14 is the air switch, which is used to protect the circuit.

[0042] The fourth output terminal of the DUT board 1 is connected to the input terminal of the test signal module 12. The fifth input terminal of the DUT board 1 is connected to the output terminal of the test signal module 12.

[0043] In some embodiments, diodes are connected in parallel across the two ends of the first coil. Such as Figure 2 、 Figure 3 and Figure 4 V5, V7 and V9 in the figure, which are the parallel-connected diodes. When power is suddenly cut off, there is voltage across the two ends of the first coil. The diodes are used to release the voltage and protect the circuit.

[0044] The output terminal of the test signal module 12 is connected to the external host computer. The output result of the test signal module 12 is displayed on the external host computer.

[0045] The output terminal of the analog standby power supply unit is connected to the analog condensing fan module 3. The output terminal of the analog standby power supply unit is connected to the analog compressor module 6. The output terminal of the analog standby power supply unit is connected to the analog blower module 9. In case of an emergency power cut, the analog standby power supply unit can supply power to the analog condensing fan module 3, the analog compressor module 6 and the analog blower module 9.

[0046] The output end of the analog delay unit is connected to the output end of the test signal module 12 and is connected to the fifth input end of the board under test 1. The input end of the analog delay unit is connected to the input end of the test signal module 12 and is connected to the fourth output end of the board under test 1. The analog delay unit is connected to the board under test 1 and is used for the test of compressor delay protection.

[0047] In some embodiments, the temperature signal simulator 2 includes resistors with different resistance values. One end of the resistors with different resistance values is connected to the power supply, and the other end of the resistors with different resistance values serves as the output end of the temperature signal simulator 2. Through the resistors with different resistance values, the temperature signal simulator 2 inputs different temperature signals to the first input end of the board under test 1.

[0048] Using the above-mentioned test platform for subway train air-conditioning board cards, the present invention provides a test method for subway train air-conditioning board cards, and the method includes the following steps:

[0049] S1. The temperature signal simulator (2) outputs a temperature simulation signal to the board under test (1). The board under test (1) determines whether it is necessary to adjust the air-conditioning temperature based on the temperature simulation signal. If not, the temperature signal simulator (2) continues to output the temperature simulation signal. If so, S2 is executed.

[0050] In the automatic position, whether it is necessary to adjust the air-conditioning temperature is judged based on UIC553 and calculated according to the following formula:

[0051] Ti = 22 + 0.25 * (Te - 19) / °C / (Te > 19 °C)

[0052] Ti = 22 / °C / (Te ≤ 19 °C)

[0053] Wherein, Ti is the set temperature inside the vehicle, and Te is the outside air temperature.

[0054] S2. The first coil (41) of the first contactor receives the high-level signal sent by the board under test (1). The first normally open end (43) and the second normally open end (42) of the first contactor are closed. After the analog condensing fan module (3) receives the voltage signal of the first power supply module (5) and the signal of the first coil (41) of the first contactor, the analog condensing fan module (3) sends a first feedback signal to the board under test (1) through the closed first normally open end (43) of the first contactor. After the board under test (1) obtains the first feedback signal, it generates a condensing fan test signal and executes S3.

[0055] S3. The first coil (71) of the second contactor receives the high-level signal sent by the board under test (1). The first normally open end (73) and the second normally open end (72) of the second contactor close. After the simulated compressor module (6) receives the voltage signal from the second power supply module (8) and the signal of the first coil (71) of the second contactor, the simulated compressor module (6) sends a second feedback signal to the board under test (1) through the closed first normally open end (73) of the second contactor. After the board under test (1) obtains the second feedback signal, it generates a compressor test signal and executes S4.

[0056] S4. The first coil (101) of the third contactor receives the high-level signal sent by the board under test (1). The first normally open end (103) and the second normally open end (102) of the third contactor close. After the simulated blower module (9) receives the voltage signal from the third power supply module (11) and the signal of the first coil (101) of the third contactor, the simulated blower module (9) sends a third feedback signal to the board under test (1) through the closed first normally open end (103) of the third contactor. After the board under test (1) obtains the third feedback signal, it generates a blower test signal and executes S5.

[0057] S5. The test signal module (12) detects the temperature simulation signal, the first feedback signal, the second feedback signal, and the third feedback signal received by the board under test (1), as well as the condensate fan test signal, the compressor test signal, and the blower test signal generated by the board under test (1), and determines whether the logical relationship between the signals received and sent by the board under test (1) is correct to obtain the normal state test result of the board and execute S6.

[0058] S6. The analog standby power supply unit of the test signal module (12) sends an emergency signal to the board under test (1), and determines whether the analog standby power supply unit of the test signal module (12) receives the emergency power start signal fed back by the board under test (1) to obtain the emergency power-off state test result of the board and execute S7.

[0059] S7. The analog delay unit of the test signal module (12) sends a delay signal to the board under test (1), determines whether the analog delay unit of the test signal module (12) receives the waiting signal fed back by the board under test (1), and determines whether the compressor test signal generated in S3 includes the compressor start signal sent to other boards to obtain the compressor delay test result.

[0060] S8. The board test result is obtained by integrating the normal state test result of the board, the emergency power-off state test result of the board, and the compressor delay test result.

[0061] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A test platform for subway train air-conditioning circuit boards, characterized in that, The platform is used for the board under test (1) in each carriage of the subway. The platform includes a temperature signal simulator (2), an analog condensation fan module (3), an analog compressor module (6), an analog air supply fan module (9), and a test signal module (12). The test signal module (12) includes an analog standby power supply unit and an analog delay unit. The output end of the temperature signal simulator (2) is connected to the first input end of the board under test (1). The first output end of the board under test (1) is connected to one end of the first coil (41) of the first contactor. The second input end of the board under test (1) is connected to one end of the first normally open contact (43) of the first contactor. The other end of the first coil (41) of the first contactor and the other end of the first normally open contact (43) of the first contactor are connected to the analog condensation fan module (3). The analog condensation fan module (3) is connected to the second normally open contact (42) of the first contactor. The second normally open contact (42) of the first contactor is connected to the first power supply module (5). The second output end of the board under test (1) is connected to one end of the first coil (71) of the second contactor. The third input end of the board under test (1) is connected to one end of the first normally open contact (73) of the second contactor. The other end of the first coil (71) of the second contactor and the other end of the first normally open contact (73) of the second contactor are connected to the analog compressor module (6). The analog compressor module (6) is connected to the second normally open contact (72) of the second contactor. The second normally open contact (72) of the second contactor is connected to the second power supply module (8). The third output end of the board under test (1) is connected to one end of the first coil (101) of the third contactor. The fourth input end of the board under test (1) is connected to one end of the first normally open contact (103) of the third contactor. The other end of the first coil (101) of the third contactor and the other end of the first normally open contact (103) of the third contactor are connected to the analog air supply fan module (9). The analog air supply fan module (9) is connected to the second normally open contact (102) of the third contactor. The second normally open contact (102) of the third contactor is connected to the third power supply module (11). The fourth output end of the board under test (1) is connected to the input end of the test signal module (12). The fifth input end of the board under test (1) is connected to the output end of the test signal module (12).

2. The test platform for the air-conditioning board of a subway train according to claim 1, wherein A diode is connected in parallel across both ends of the first coil.

3. The test platform for a subway train air-conditioning board card according to claim 1, characterized in that The output end of the test signal module (12) is connected to an external host computer.

4. The test platform for the air-conditioning board card of a subway train according to claim 1, characterized in that, The temperature signal simulator (2) includes resistors with different resistances. One end of the resistors with different resistances is connected to the power supply, and the other end serves as the output end of the temperature signal simulator (2).

5. A subway train air-conditioning board card test platform according to claim 1, characterized in that, The output end of the analog standby power supply unit is connected to the analog condensation fan module (3).

6. The test platform for a subway train air-conditioning board card according to claim 1, wherein The output end of the analog standby power supply unit is connected to the analog compressor module (6).

7. A test platform for subway train air-conditioning board cards according to claim 1, characterized in that, The output end of the analog standby power supply unit is connected to the analog air supply fan module (9).

8. The test platform for a subway train air-conditioning board card according to claim 1, characterized in that, The output end of the analog delay unit is connected to the output end of the test signal module (12) and is connected to the fifth input end of the board under test (1).

9. The test platform for the air-conditioning board of a subway train according to claim 8, characterized in that, The input end of the analog delay unit is connected to the input end of the test signal module (12) and is connected to the fourth output end of the board under test (1).

10. A test method for a subway train air-conditioning board card, characterized in that, Using the subway train air conditioner board test platform described in any one of claims 1-9, the method includes the following steps: S1. The temperature signal simulator (2) outputs a temperature analog signal to the board under test (1). The board under test (1) determines whether it is necessary to adjust the air conditioner temperature based on the temperature analog signal. If not, the temperature signal simulator (2) continues to output the temperature analog signal. If so, execute S2; S2. The first coil (41) of the first contactor receives the high-level signal sent by the board under test (1). The first normally open end (43) and the second normally open end (42) of the first contactor are closed. After the analog condensing fan module (3) receives the voltage signal of the first power supply module (5) and the signal of the first coil (41) of the first contactor, the analog condensing fan module (3) sends a first feedback signal to the board under test (1) through the closed first normally open end (43) of the first contactor. After the board under test (1) obtains the first feedback signal, it generates a condensing fan test signal and executes S3; S3. The first coil (71) of the second contactor receives the high-level signal sent by the board under test (1). The first normally open end (73) and the second normally open end (72) of the second contactor are closed. After the analog compressor module (6) receives the voltage signal of the second power supply module (8) and the signal of the first coil (71) of the second contactor, the analog compressor module (6) sends a second feedback signal to the board under test (1) through the closed first normally open end (73) of the second contactor. After the board under test (1) obtains the second feedback signal, it generates a compressor test signal and executes S4; S5. The first coil (101) of the third contactor receives the high-level signal sent by the board under test (1). The first normally open end (103) and the second normally open end (102) of the third contactor are closed. After the analog blower module (9) receives the voltage signal of the third power supply module (11) and the signal of the first coil (101) of the third contactor, the analog blower module (9) sends a third feedback signal to the board under test (1) through the closed first normally open end (103) of the third contactor. After the board under test (1) obtains the third feedback signal, it generates a blower test signal and executes S6; S6. The test signal module (12) detects the temperature analog signal, the first feedback signal, the second feedback signal, and the third feedback signal received by the board under test (1), as well as the condensing fan test signal, the compressor test signal, and the blower test signal generated by the board under test (1), and determines whether the logical relationship between the signals received and sent by the board under test (1) is correct to obtain the normal test result of the board, and execute S7; S7. The analog standby power supply unit of the test signal module (12) sends an emergency signal to the board under test (1), and determines whether the analog standby power supply unit of the test signal module (12) receives the emergency power start signal fed back by the board under test (1) to obtain the test result of the emergency power-off state of the board, and execute S7; S7. The analog delay unit of the test signal module (12) sends a delay signal to the board under test (1), determines whether the analog delay unit of the test signal module (12) receives the waiting signal fed back by the board under test (1), and determines whether the compressor test signal generated in S3 includes the compressor start signal sent to other boards, so as to obtain the compressor delay test result; S8. Obtain the board test result by integrating the normal test result of the board, the test result of the board's emergency power-off state, and the compressor delay test result.

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