A windshield heating computer test bench

Abstract

The present application relates to the technical field of aviation equipment test, in particular to a windshield heating computer test bench; by setting double current meter, 220VAC voltmeter, 115VAC voltmeter, power control switch, voltage detection interface, first test area interface, second test area interface, temperature signal simulation selection switch, TVS voltage selection switch, power interruption time selection switch, voltage selection switch on the front panel of the test case; setting voltage and current measurement module, switching power supply module, power signal conditioning module, discrete input module, temperature simulation module, load box inside the test case; the test requirement of each comprehensive performance of windshield heating is realized, and the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aviation equipment testing, in particular to a windshield heating computer test bench. BACKGROUND

[0002] During the flight of an airplane, the windshield of the cockpit is affected by weather, flight altitude and other factors, which may cause icing or fogging, thus affecting the pilot's field of vision. In order to prevent the windshield from icing or fogging during the flight of the airplane, a windshield heating system is installed on the airplane. In order to ensure that the windshield reaches a predetermined temperature and effectively realizes anti-icing and anti-fogging, the heating power and heating time of the windshield heating system are usually designed and calculated. When the heating system is completed, a test device is used on the ground to test the performance of the windshield heating temperature, heating power, heating uniformity, heating time and other indicators, complete the ground performance test verification, ensure that the windshield heating system of the airplane has good heating and defogging or deicing performance, make the pilot's field of vision clearer, and thus effectively protect the safety of the airplane flight. However, the test device in this field has the problems of low integration, inconvenient test operation, easy test errors and low test efficiency. SUMMARY

[0003] The present application is directed to the above problems of multiple test devices, low integration, inconvenient test operation, easy test errors and low test efficiency, and proposes a windshield heating computer test bench. A double-current meter, a 220VAC voltmeter, a 115VAC voltmeter, a power control switch, a voltage detection interface, a first test area interface, a second test area interface, a temperature signal simulation selection switch, a TVS voltage selection switch, a power interruption time selection switch and a voltage selection switch are arranged on the front panel of the test case. A voltage and current measurement module, a switching power supply module, a power signal conditioning module, a discrete input module, a temperature simulation module and a load box are arranged inside the test case. The test bench realizes the test requirements of the comprehensive performance of the windshield heating and improves the test efficiency.

[0004] The present application specifically realizes the following contents:

[0005] A windshield heating computer test bench is connected with a windshield heating computer; the test bench comprises a test case, and a double-current meter, a 220VAC voltmeter, a 115VAC voltmeter, a power control switch, a voltage detection interface, a first test area interface, a second test area interface, a temperature signal simulation selection switch, a TVS voltage selection switch, a power interruption time selection switch and a voltage selection switch are arranged on the front panel of the test case.

[0006] And voltage current measurement module, switching power module, power signal conditioning module, discrete quantity input module, temperature simulation module, load box arranged in the test case, switching power module, power signal conditioning module, discrete quantity input module, temperature simulation module, load box arranged in the test case;

[0007] The voltage current measurement module is connected with the double-way ammeter, 220VAC voltmeter, 115VAC voltmeter, the power control switch, the windshield heating computer;

[0008] The switching power module is connected with the power control switch and the windshield heating computer;

[0009] The power signal conditioning module is connected with the TVS voltage selection switch, power interruption time selection switch, voltage selection switch and the windshield heating computer;

[0010] The discrete quantity input module is connected with the second test area interface and the windshield heating computer;

[0011] The temperature simulation module is connected with the first test area interface and the windshield heating computer;

[0012] The input end of the load box is connected with 220VAC power supply, and the output end is connected with the windshield heating computer.

[0013] In order to better realize the application, further, the voltage current measurement module includes fuse F1, fuse F2, fuse F3, AC current sensor U1, AC current sensor U2, contactor KM1, contactor KM2 and contactor KM3;

[0014] The input end of the fuse F1 inputs 115VAC_A phase voltage, and the output end is connected with the input end of the AC current sensor U1;

[0015] The input end of the contactor KM1 is connected with the output end of the AC current sensor U1, and the output end of the contactor KM1 is connected with the output end of the AC current sensor U1, the windshield heating computer and the power switch interface;

[0016] The input end of the fuse F2 inputs 115VAC_B phase voltage, and the output end is connected with the input end of the contactor KM2;

[0017] The output end of the contactor KM2 is connected with the power switch interface and the windshield heating computer;

[0018] The input end of the fuse F3 inputs 115VAC_C phase voltage, and the output end is connected with the input end of the AC current sensor U2;

[0019] The input end of the contactor KM3 is connected with the output end of the alternating current sensor U2, and the output end of the contactor KM3 is connected with the output end of the alternating current sensor U1, the windshield heating computer and the power switch interface.

[0020] The double-way ammeter is connected with the input end and the output end of the alternating current sensor U1, the input end and the output end of the alternating current sensor U2.

[0021] One end of the 220VAC voltmeter is connected between the output end of the fuse F1 and the input end of the alternating current sensor U1, and the other end is connected between the output end of the fuse F1 and the input end of the contactor KM2.

[0022] One end of the 115VAC voltmeter is connected between the output end of the fuse F3 and the input end of the alternating current sensor U2, and the other end is connected with 115VAC_N voltage.

[0023] In order to better realize the present application, further, the switch power module comprises a socket XS1, a double-pole double-throw switch S21, a double-pole double-throw switch S22, a power converter G1, a power converter G2, a resistor R1, a resistor R2, a light-emitting diode VB1 and a light-emitting diode VB2.

[0024] The input end of the socket XS1 is connected with 220VAC power supply, and the output end is connected with the first input end and the second input end of the double-pole double-throw switch S21.

[0025] The input end of the resistor R1 is connected between the first output end of the double-pole double-throw switch S21 and the first input end of the power converter, and the output end of the resistor R1 is connected with the input end of the light-emitting diode VB1.

[0026] The output end of the light-emitting diode VB1 is connected between the second output end of the double-pole double-throw switch S21 and the second input end of the power converter G1.

[0027] The first output end of the power converter G1 is connected with the first input end of the double-pole double-throw switch S22 and the power control switch, and the second output end of the power converter G1 is connected with the second input end of the double-pole double-throw switch S22.

[0028] The first output end of the double-pole double-throw switch S22 is connected with the first input end of the power converter G2, and the second output end of the double-pole double-throw switch S22 is connected with the input end of the power converter G2.

[0029] The input end of the resistor R2 is connected between the first output end of the double-pole double-throw switch S22 and the first input end of the power converter G2, and the output end of the resistor R2 is connected with the input end of the light emitting diode VB2;

[0030] The output end of the light emitting diode VB2 is connected between the second output end of the double-pole double-throw switch S22 and the second input end of the power converter G2.

[0031] The output end of the power converter G2 is connected with the power control switch.

[0032] In order to better realize the present application, further, the power signal conditioning module comprises switches S31, S32, S33 and S34.

[0033] The TVS voltage selection switch is connected with the power signal conditioning module through the switches S32 and S33.

[0034] The power interruption time selection switch is connected with the power signal conditioning module through the switch S34.

[0035] The voltage selection switch is connected with the power signal conditioning module through the switch S31.

[0036] In order to better realize the present application, further, the temperature simulation module comprises an electromagnetic relay, a switch K1 and an electric connector XS5 connected in sequence.

[0037] The input end of the temperature simulation module is connected with the output end of the power signal conditioning module, and the output end is connected with a second test area interface and the windshield heating computer through the electric connector XS5.

[0038] In order to better realize the present application, further, the load box module comprises a cooling fan, a windshield heater, a fixed window heater and a sliding window heater.

[0039] The input end of the cooling fan is connected with a 220VAC power source, and the output end is connected with the input end of the windshield heater, the input end of the fixed window heater and the input end of the sliding window heater.

[0040] The output end of the windshield heater, the output end of the fixed window heater and the output end of the sliding window heater are connected with the windshield heating computer.

[0041] The present application has the following beneficial effects:

[0042] (1) the windshield heating computer test bench provided by the application can simulate the whole process of the windshield heating computer on the airplane for heating and deicing the windshield of the airplane, the load adopts a three-phase alternating current load box, and three 50A current loads can be simultaneously provided.

[0043] (2) according to the test requirements of the windshield heating controller, various function test circuits are integrated on the test bench, various test function modules and corresponding test interfaces are optimized, the performance of the windshield heating controller is comprehensively tested, the test control operation is convenient, and the circuit system stability and reliability of the test bench are high.

[0044] (3) the first test area interface and the second test area interface are arranged on the front panel of the test machine box, the arrangement positions of the test function areas on the front panel are set, and the positions of the switches and test interfaces in the test function areas are optimized, so that the misoperation in the test process is effectively prevented, the test efficiency is effectively improved, and the test safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 The front panel structure schematic diagram of the windshield heating computer test bench provided by the application is provided.

[0046] Figure 2 The internal module structure schematic diagram of the windshield heating computer test bench provided by the application is provided.

[0047] Figure 3 The switch power supply module circuit principle diagram provided by the application is provided.

[0048] Figure 4 The voltage and current measurement module circuit principle diagram provided by the application is provided.

[0049] Figure 5 The signal conditioning board circuit principle diagram provided by the application is provided.

[0050] Figure 6 The power interruption module circuit principle diagram provided by the application is provided.

[0051] Figure 7 The high-voltage power supply module circuit principle diagram provided by the application is provided.

[0052] Figure 8 The three-phase alternating current source input module circuit principle diagram provided by the application is provided.

[0053] Figure 9 First part circuit schematic of the discrete quantity input module provided by the present application.

[0054] Figure 10 Second part circuit schematic of the discrete quantity input module provided by the present application.

[0055] Figure 11 First part circuit schematic of the temperature simulation module provided by the present application.

[0056] Figure 12 Second part circuit schematic of the temperature simulation module provided by the present application.

[0057] Figure 13 Third part circuit schematic of the temperature simulation module provided by the present application.

[0058] Figure 14 First part circuit schematic of the power supply conditioning module provided by the present application.

[0059] Figure 15 Second part circuit schematic of the power supply conditioning module provided by the present application.

[0060] Figure 16 Third part circuit schematic of the power supply conditioning module provided by the present application.

[0061] Figure 17 Fourth part circuit schematic of the power supply conditioning module provided by the present application.

[0062] Figure 18 Fifth part circuit schematic of the power supply conditioning module provided by the present application.

[0063] Figure 19 Sixth part circuit schematic of the power supply conditioning module provided by the present application.

[0064] Figure 20 First part circuit schematic of the load box provided by the present application.

[0065] Figure 21 Second part circuit schematic of the load box provided by the present application.

[0066] Figure 22 Third part circuit schematic of the load box provided by the present application.

[0067] Figure 23 Fourth part circuit schematic of the load box provided by the present application.

[0068] Figure 24 First part circuit schematic of the cable provided by the present application.

[0069] Figure 25The second part circuit schematic diagram of the cable provided by the application.

[0070] Figure 26 The third part circuit schematic diagram of the cable provided by the application.

[0071] Wherein, 1, dual-channel ammeter, 2, 220VAC voltmeter, 3, 115VAC voltmeter, 4, power control switch, 5, voltage detection interface, 6, first test area interface, 7, second test area interface, 8, temperature signal simulation selection switch, 9, TVS voltage selection switch, 10, power interruption time selection switch, 11, voltage selection switch. DETAILED DESCRIPTION

[0072] In order to more clearly illustrate the technical solutions of the embodiments of the application, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. It should be understood that the described embodiments are only a part of the embodiments of the application, not all the embodiments, and therefore should not be regarded as limiting the scope of protection. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0073] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0074] Embodiment 1

[0075] The embodiment provides a windshield heating computer test bench connected with a windshield heating computer. Figure 1 、 Figure 2 As shown in the figure, it comprises a test case, and the front panel of the test case is provided with a dual-channel ammeter 1, a 220VAC voltmeter 2, a 115VAC voltmeter 3, a power control switch 4, a voltage detection interface 5, a first test area interface 6, a second test area interface 7, a temperature signal simulation selection switch 8, a TVS voltage selection switch 9, a power interruption time selection switch 10, and a voltage selection switch 11.

[0076] And the voltage and current measurement module, the switching power supply module, the power signal conditioning module, the discrete quantity input module, the temperature simulation module, and the load box arranged in the test case.

[0077] The voltage current measurement module is connected with the double-way ammeter 1, 220VAC voltmeter 2, 115VAC voltmeter 3, the voltage detection interface 5 and the windshield heating computer;

[0078] The switch power module is connected with the power control switch 4 and the windshield heating computer;

[0079] The power signal conditioning module is connected with the TVS voltage selection switch 8, the power interruption time selection switch 9, the voltage selection switch 10 and the windshield heating computer;

[0080] The discrete quantity input module is connected with the second test area interface 7 and the windshield heating computer;

[0081] The temperature simulation module is connected with the first test area interface 6 and the windshield heating computer;

[0082] The input end of the load box is connected with 220VAC power supply, and the output end is connected with the windshield heating computer.

[0083] Working principle: the embodiment realizes the test demand of the comprehensive performance of the windshield heating by setting the double-way ammeter 1, 220VAC voltmeter 2, 115VAC voltmeter 3, power control switch 4, voltage detection interface 5, first test area interface 6, second test area interface 7, temperature signal simulation selection switch 8, TVS voltage selection switch 9, power interruption time selection switch 10 and voltage selection switch 11 on the front panel of the test case, and setting the voltage current measurement module, switch power module, power signal conditioning module, discrete quantity input module and temperature simulation module in the test case, and improves the test efficiency.

[0084] Embodiment 2:

[0085] The embodiment is based on the above-mentioned embodiment 1, as shown in Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The voltage current measurement module includes fuse F1, fuse F2, fuse F3, alternating current sensor U1, alternating current sensor U2, contactor KM1, contactor KM2 and contactor KM3.

[0086] The input end of the fuse F1 is connected with 115VAC_A phase voltage, and the output end is connected with the input end of the alternating current sensor U1.

[0087] The input end of the contactor KM1 is connected with the output end of the alternating current sensor U1, and the output end of the contactor KM1 is connected with the output end of the alternating current sensor U1, the windshield heating computer and the voltage detection interface 5;

[0088] The input end of the fuse F2 inputs 115VAC_B phase voltage, and the output end is connected with the input end of the contactor KM2;

[0089] The output end of the contactor KM2 is connected with the voltage detection interface 5 and the windshield heating computer;

[0090] The input end of the fuse F3 inputs 115VAC_C phase voltage, and the output end is connected with the input end of the alternating current sensor U2;

[0091] The input end of the contactor KM3 is connected with the output end of the alternating current sensor U2, and the output end of the contactor KM3 is connected with the output end of the alternating current sensor U1, the windshield heating computer and the voltage detection interface 5;

[0092] The double-way ammeter 1 is connected with the input end and the output end of the alternating current sensor U1, the input end and the output end of the alternating current sensor U2;

[0093] One end of the 220VAC voltmeter 2 is connected between the output end of the fuse F1 and the input end of the alternating current sensor U1, and the other end is connected between the output end of the fuse F1 and the input end of the contactor KM2;

[0094] One end of the 115VAC voltmeter 3 is connected between the output end of the fuse F3 and the input end of the alternating current sensor U2, and the other end is connected with 115VAC_N voltage.

[0095] The switch power supply module comprises a socket XS1, a double-pole double-throw switch S21, a double-pole double-throw switch S22, a power converter G1, a power converter G2, a resistor R1, a resistor R2, a light-emitting diode VB1 and a light-emitting diode VB2;

[0096] The input end of the socket XS1 is connected with 220VAC power supply, and the output end is connected with the first input end and the second input end of the double-pole double-throw switch S21;

[0097] The input end of the resistor R1 is connected between the first output end of the double-pole double-throw switch S21 and the first input end of the power converter, and the output end of the resistor R1 is connected with the input end of the light-emitting diode VB1;

[0098] The output end of the light emitting diode VB1 is connected between the second output end of the double-pole double-throw switch S21 and the second input end of the power converter G1;

[0099] The first output end of the double-pole double-throw switch S22 is connected to the first input end of the power converter G2, and the second output end of the double-pole double-throw switch S22 is connected to the input end of the power converter G2;

[0100] The first output end of the double-pole double-throw switch S22 is connected to the first input end of the power converter G2, and the second output end of the double-pole double-throw switch S22 is connected to the input end of the power converter G2;

[0101] The input end of the resistor R2 is connected between the first output end of the double-pole double-throw switch S22 and the first input end of the power converter G2, and the output end of the resistor R2 is connected to the input end of the light emitting diode VB2;

[0102] The output end of the light emitting diode VB2 is connected between the second output end of the double-pole double-throw switch S22 and the second input end of the power converter G2;

[0103] The output end of the power converter G2 is connected to the power control switch 4.

[0104] The socket XS1 in the embodiment is a 220VAC socket; the double-pole double-throw switch S21 is a KN22-202, 220VAC switch; the double-pole double-throw switch S22 is a KN22-202, 28VAC switch; the power converter G1 is a 28VDC / 5A power converter; the power converter G2 is a ±15VDC / 2A power converter; the resistor R1 is a 47K-2W resistor; the resistor R2 is a 5.6K-0.5W resistor; the light emitting diode VB1 is a 220VAC light emitting diode; the light emitting diode VB2 is a 28VAC light emitting diode; the alternating current sensor U1 and the alternating current sensor U2 are WBI414N25 alternating current sensors; the contactor KM1, the contactor KM2, and the contactor KM3 are RELAY-3PDT-20A contactors; the switches S1, S2, and S3 are KN21-102 switches; the connector XS2 is a Y50DX-2004ZJ10 electrical connector; and the connector XS3 is a Y50DX-2004ZK10 electrical connector.

[0105] The other parts of the embodiment are the same as those of the above-mentioned embodiment 1, and thus will not be described again.

[0106] Embodiment 3:

[0107] The embodiment is based on any one of the above-mentioned embodiments 1-2, and as shown in Figure 9 、 Figure 10 The switch S36 and the switch S37 are connected with the voltage selection switch 11 and connected with the windshield heating computer through the electric connector XS4.

[0108] The switch S36 and the switch S37 are connected with the voltage selection switch 11 and connected with the windshield heating computer through the electric connector XS4.

[0109] As shown in Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 The temperature simulation module includes an electromagnetic relay, a switch K1 and an electric connector XS5 connected in sequence.

[0110] The input end of the temperature simulation module is connected with the output end of the power signal conditioning module, and the output end is connected with the second test area interface and the windshield heating computer through the electric connection connector XS5.

[0111] As shown in Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 The load box module includes a cooling fan, a windshield heater, a fixed window heater and a sliding window heater.

[0112] The input end of the cooling fan is connected with a 220VAC power supply, and the output end is connected with the input end of the windshield heater, the input end of the fixed window heater and the input end of the sliding window heater.

[0113] The output end of the windshield heater, the output end of the fixed window heater and the output end of the sliding window heater are connected with the windshield heating computer.

[0114] As shown in Figure 24 、 Figure 25 、 Figure 26 The length of the cable line arranged in the embodiment is 3 meters.

[0115] The other parts of the embodiment are the same as any one of the above-mentioned embodiments 1-2, and thus will not be described again.

[0116] Embodiment 4:

[0117] The embodiment is based on any one of the above-mentioned embodiments 1-3, and as shown in Figure 1The detailed description is made with one specific embodiment shown.

[0118] The test bench is a special test equipment for P / N: 733903, 416-00318 windshield heating computer. The user can effectively complete the performance test of windshield heating computer by operating various control switches and various measuring instruments on the test bench panel.

[0119] The test bench of this embodiment adopts a manual work module. It provides UUT working power supply and detects its voltage and current value, provides discrete and analog input signals, provides discrete output signal test interface and various communication signal test interface. It also provides output load test circuit.

[0120] This embodiment provides the following signals: (1) AC power supply: three-phase 115VAC / 400Hz, 50A; (2) DC power supply: 28VDC, 5A.

[0121] The interface definition and corresponding signal name of this embodiment are shown in Table 1.

[0122] Table 1 Interface definition table of HCSN-245-01 power cable back panel

[0123]

[0124] Table 2 Switch table

[0125]

[0126] The use conditions for testing using the windshield heating computer test bench of this embodiment include:

[0127] 1. Power supply;

[0128] AC power supply: 220VAC / 50Hz, 3A.

[0129] AC power supply: three-phase 115VAC / 400Hz, 50A.

[0130] 2. Environment;

[0131] Temperature: -10℃~+50℃;

[0132] Humidity: 10%RH~85%RH;

[0133] Atmospheric pressure: field pressure.

[0134] Indoor fixed point, should be used in a dust-free, acid and alkali-free, and other corrosive gas-free, strong mechanical vibration impact-free and strong electromagnetic field-free environment.

[0135] 3. Use steps;

[0136] 1) Preparation before test

[0137] Step 1: Turn all the front panel button switches to off position, connect the 220VAC / 50Hz power supply and 3-phase 115VAC / 400Hz power supply to the test equipment through the power cable respectively.

[0138] Step 2: Turn the front panel 220VAC power switch to on position, make sure the 220VAC indicator light and all the meter indicators are on, then turn the switch to off position.

[0139] Step 3: Connect the test object to the test bench through the test cable.

[0140] 2) Test

[0141] Step 4: Turn the front panel 220VAC power switch to on position, then test according to the test procedure in the CMM manual.

[0142] 3) Test completion

[0143] Step 5: Turn the front panel 220VAC power switch to off position.

[0144] Step 6: Disconnect all the cables, and store the equipment according to the regulation.

[0145] 4, Matters needing attention;

[0146] 1) Before power on, make sure the front panel 220VAC power switch is in off position, and carefully check to ensure that there is no extra conductive object such as hanging wire on the test bench.

[0147] 2) Do not plug or unplug the test object plug while the power is on, turn all the power switches to on position and disconnect all the cables after the test is completed.

[0148] 3) In case of emergency, turn the 220VAC power switch to off position first.

[0149] 5, Power failure;

[0150] 1) If the 220VAC power indicator light is not on: check if the 220VAC power input line is normal; check if the power switch wiring is correct.

[0151] 2) If there is no 28VDC power output: check if the power supply inside the power supply box is working properly.

[0152] The windshield heating computer test bench provided by the embodiment can simulate the whole process of the windshield heating computer on the airplane for heating and deicing the windshield, the load adopts a three-phase alternating current load box, and three 50A current loads can be provided simultaneously. Moreover, the test bench can also simulate the special protection function of the windshield heating computer for avoiding windshield glass damage under various special conditions such as temperature being too high, windshield heating wire short circuit, power interruption, main power voltage being too low, and the redundant working capacity under special conditions, so that the windshield heating computer control windshield heating can be simulated in all directions. The test of the windshield heating computer is realized through the test method consistent with the CMM manual, the repair work is realized, and the test equipment is relatively advanced in the field of windshield heating. At present, there is no more advanced windshield heating test bench in the same industry. So far, more than 20 windshield heating computers of the series of part number 416-00318 and 733903 have been repaired, and good repair effect has been achieved.

[0153] The other parts of the embodiment are the same as any one of the above-mentioned embodiments 1-3, and thus will not be described again.

[0154] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change made according to the technical essence of the present application to the above embodiment falls within the protection scope of the present application.

Claims

1. A windshield heating computer test bench, connected to a windshield heating computer; characterized in that, The windshield heating computer test bench includes a test chassis. The front panel of the test chassis is equipped with a dual-channel ammeter (1), a 220VAC voltmeter (2), a 115VAC voltmeter (3), a power control switch (4), a voltage detection interface (5), a first test area interface (6), a second test area interface (7), a temperature signal simulation selection switch (8), a TVS voltage selection switch (9), a power interruption time selection switch (10), and a voltage selection switch (11). The test chassis also includes a voltage and current measurement module, a switching power supply module, a power signal conditioning module, a discrete input module, a temperature simulation module, and a load box. The voltage and current measurement module is connected to the dual-channel ammeter (1), the 220VAC voltmeter (2), the 115VAC voltmeter (3), the voltage detection interface (5), and the windshield heating computer; The switching power supply module is connected to the power control switch (4) and the windshield heating computer; The power signal conditioning module is connected to the TVS voltage selection switch (9), the power interruption time selection switch (10), the voltage selection switch (11), and the windshield heating computer; The discrete input module is connected to the second test area interface (7) and the windshield heating computer; The temperature simulation module is connected to the first test area interface (6) and the windshield heating computer; The load cell is connected to a 220VAC power supply at its input terminal and to the windshield heating computer at its output terminal. The voltage and current measurement module includes fuses F1, F2, and F3, AC current sensor U1, AC current sensor U2, contactor KM1, contactor KM2, and contactor KM3; The fuse F1 is input with a 115VAC_A phase voltage, and its output is connected to the input of the AC current sensor U1. The input terminal of the contactor KM1 is connected to the output terminal of the AC current sensor U1, the output terminal of the contactor KM1 is connected to the windshield heating computer, and is connected to the voltage detection interface (5) on the front panel of the windshield heating computer test bench. The fuse F2 is input with a 115VAC_B phase voltage, and its output is connected to the input of the contactor KM2. The output terminal of the contactor KM2 is connected to the voltage detection interface (5) and the windshield heating computer; The fuse F3 is input with a 115VAC phase C voltage, and its output is connected to the input of the AC current sensor U2. The input terminal of the contactor KM3 is connected to the output terminal of the AC current sensor U2, and the output terminal of the contactor KM3 is connected to the windshield heating computer and the voltage detection interface (5). The input terminal of the AC current sensor U1, the output terminal of the AC current sensor U1, the input terminal of the AC current sensor U2, and the output terminal of the AC current sensor U2 are connected to the dual-channel ammeter (1) installed on the front panel of the windshield heating computer test bench. One end of the 220VAC voltmeter (2) set on the front panel of the windshield heating computer test bench is connected between the output terminal of the fuse F1 and the input terminal of the AC current sensor U1, and the other end is connected between the output terminal of the fuse F2 and the input terminal of the contactor KM2. One end of the 115VAC voltmeter (3) located on the front panel of the windshield heating computer test bench is connected between the output terminal of the fuse F3 and the input terminal of the AC current sensor U2, and the other end is connected to the 115VAC_N voltage.

2. The windshield heating computer test bench according to claim 1, characterized in that, The windshield heating computer test bench also includes a switching power supply module; the switching power supply module includes a socket XS1, a double-pole double-throw switch S21, a double-pole double-throw switch S22, a power converter G1, a power converter G2, a resistor R1, a resistor R2, an LED VB1, and an LED VB2. The input terminal of the socket XS1 is connected to a 220VAC power supply, and the output terminal is connected to the first and second input terminals of the double-pole double-throw switch S21. The input terminal of the resistor R1 is connected between the first output terminal of the double-pole double-throw switch S21 and the first input terminal of the power converter, and the output terminal of the resistor R1 is connected to the input terminal of the light-emitting diode VB1. The output terminal of the light-emitting diode VB1 is connected between the second output terminal of the double-pole double-throw switch S21 and the second input terminal of the power converter G1. The first output terminal of the power converter G1 is connected to the first input terminal of the double-pole double-throw switch S22 and the power control switch (4) on the front panel of the windshield heating computer test bench; the second output terminal of the power converter G1 is connected to the second input terminal of the double-pole double-throw switch S22. The first output terminal of the double-pole double-throw switch S22 is connected to the first input terminal of the power converter G2, and the second output terminal of the double-pole double-throw switch S22 is connected to the input terminal of the power converter G2. The input terminal of the resistor R2 is connected between the first output terminal of the double-pole double-throw switch S22 and the first input terminal of the power converter G2, and the output terminal of the resistor R2 is connected to the input terminal of the light-emitting diode VB2. The output terminal of the light-emitting diode VB2 is connected between the second output terminal of the double-pole double-throw switch S22 and the second input terminal of the power converter G2; The output terminal of the power converter G2 is connected to the power control switch (4).

3. The windshield heating computer test bench according to claim 2, characterized in that, The windshield heating computer test bench also includes a power signal conditioning module; the input terminal of the power signal conditioning module is connected to the output terminal of the switching power supply module; the power signal conditioning module includes switches S31, S32, S33, and S34. The switches S32 and S33 are connected to the power signal conditioning module via a TVS voltage selection switch (9) located on the front panel of the windshield heating computer test bench. The switch S34 is connected to the power signal conditioning module via a power interruption time selection switch (10) located on the front panel of the windshield heating computer test bench.

4. The windshield heating computer test bench according to claim 3, characterized in that, The windshield heating computer test bench also includes a discrete input module; the input terminal of the discrete input module is connected to the output terminal of the power signal conditioning module; the discrete input module includes switch S36, switch S37, and electrical connector XS4; The switches S36 and S37 are connected to the voltage selection switch (11) on the front panel of the windshield heating computer test bench, and are connected to the windshield heating computer through the electrical connector XS4.

5. A windshield heating computer test bench according to claim 4, characterized in that, The windshield heating computer test bench also includes a temperature simulation module; the input terminal of the temperature simulation module is connected to the output terminal of the power signal conditioning module; the temperature simulation module includes an electromagnetic relay, a switch K1, and an electrical connector XS5 connected in sequence. The input terminal of the temperature simulation module is connected to the output terminal of the power signal conditioning module, and the output terminal is connected to the temperature signal simulation selection switch (8) and the windshield heating computer on the front panel of the windshield heating computer test bench via the electrical connector XS5.

6. A windshield heating computer test bench according to claim 1, characterized in that, The windshield heating computer test bench also includes a load box; the load box includes a cooling fan, a windshield heater, a fixed window heater, and a sliding window heater; The cooling fan is powered by 220VAC at its input terminal and its output terminal is connected to the input terminals of the windshield heater, the fixed window heater, and the sliding window heater. The output terminals of the windshield heater, the fixed window heater, and the sliding window heater are connected to the windshield heating computer.

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