Equipment and method for testing atmospheric data system sensor

Abstract

The invention belongs to the technical field of aviation testing, and provides a device and method for testing an atmosphere data system sensor, and the device mainly comprises a test case, a power supply, a voltmeter, an ammeter, a wave band switch, an adjusting knob, a socket, a detection port, a thermometer, a working power supply, and an adjustable precision power supply. According to the invention, modular design is adopted, so that electrical performance index inspection of attack angle sensors, zero position regulators and total temperature sensors of various models can be completed; the equipment has the characteristics of high test precision, wide application range, strong generalizability, good reliability and maintainability, moderate volume and weight and simplicity in operation.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft function testing and detection, and in particular, relates to a device and method for testing an atmospheric data system sensor. Background Art

[0002] The atmospheric data system sensor test equipment is a special equipment for testing the technical performance of the zero position regulator, angle of attack sensor, sideslip angle sensor, atmospheric temperature sensor, and the matching test of the angle of attack sensor / sideslip angle sensor and the zero position regulator. This test equipment can complete the inspection of the electrical performance indicators of the product. It has the characteristics of high test accuracy, good reliability and maintainability, moderate size and weight, and simple operation.

[0003] The test device in the relative technology has the following problems:

[0004] 1. It can only complete the test of a single model of atmospheric data sensor and does not have the ability to test multiple models;

[0005] 2. The matching test of the angle of attack sensor / sideslip angle sensor and the zero position adjuster cannot be carried out;

[0006] 3. The measurement and calibration are complicated and the meter head needs to be disassembled. Summary of the invention

[0007] Purpose of the invention: To provide an atmospheric data system sensor test device and method to complete ground functional performance tests of multiple types of angle of attack sensors, sideslip angle sensors, zero position regulators and temperature sensors, which has a wider application space and higher promotion value for aircraft atmospheric data sensor testing.

[0008] In a first aspect, the present application provides a method for testing an angle of attack sensor of an air data system, the method comprising:

[0009] Pre-test preparation;

[0010] Performance check: Set switch S1 to the "on" position and turn the angle of attack sensor vane to the specified angle. Turn switch S11 to the "1", "2", "3", and "4" positions in sequence and write down the values ​​displayed on the numerical voltmeter. These values ​​are the percentage measurement values ​​of each channel of the angle of attack sensor.

[0011] Weathervane half-power heating test: Connect the AC115V heating power supply, turn the switch S2 to the "on" position, the AC115V voltmeter displays 115V voltage; turn the S5 switch upward and keep it still, the red heating indicator light above the S2 switch should light up, and the AC digital ammeter indicates the half-power heating current value of the weathervane.

[0012] Preferably, the preparation before the test includes:

[0013] Set switches S14 and S15 to the "measurement" position, switch S1 to "off", switch S8 to the "GGJ" position, switch S10 to the "single piece" position, switch S12 to the "voltage" position, and switch S13 to the "component" position;

[0014] Use one end of the cable to connect the tested product, and the other end to the X4 socket of the test equipment;

[0015] Connect the power cable of the atmospheric data system sensor test equipment to the DC28V power supply, and use a special cable to connect the angle of attack sensor gauge to the AC220V power supply;

[0016] Select the voltage test on the digital multimeter, connect the red test lead to the "function test terminal +", and the black test lead to the "function test terminal -".

[0017] In a second aspect, the present application also provides a method for testing an air data system zero regulator, the method comprising:

[0018] Connect one end of the test cable to the finished product and the other end to the X3 socket of the test equipment;

[0019] Set switch S1 to "off", S14 and S15 to "measure", S8 to "GGT", S10 to "single", S12 to "voltage", and S13 to "component";

[0020] Set S1 to the "on" position and turn the S9 switch to the "1" position. Connect the red test pin of the digital multimeter to "аLi1H" and the black test pin to "LL"; adjust the coarse and fine adjustment potentiometers so that the input voltage indicates 0V on the multimeter;

[0021] Select voltage test on the digital multimeter, connect the red test lead to "function test terminal +", and the black test lead to "function test terminal -";

[0022] Use a flat-blade screwdriver to adjust the potentiometer on the finished product to the positions of 0°, -2°, -4°, +2°, and +4° respectively, and turn the S9 switch to the "1" and "2" positions in turn. The indication of the digital multimeter is the output voltage of each channel under test.

[0023] According to the above method, set the input voltage to 5V and 10V respectively, place the zero adjuster at the required check point, and record the voltage value displayed on the multimeter, which should meet the requirements.

[0024] In a third aspect, the present application also provides a method for testing an atmospheric data system temperature sensor, the method comprising:

[0025] Resistance test;

[0026] Test of heating consumption current: To test the heating current of the total atmospheric temperature sensor, use a special heating cable, connect the sensor to the DC regulated power supply, turn on the power supply, output 28V DC voltage, turn on the power switch on the cable, and the current indication on the regulated power supply is the heating consumption current, which should meet the requirements.

[0027] Preferably, the resistance test includes:

[0028] Turn switch S8 to the "temperature" position;

[0029] Set the S6 switch to the channel to be tested. The upward switch is for channel 1, and the downward switch is for channel 2.

[0030] Set the working state of the digital multimeter to resistance, insert two red test pens into two red "function test terminals", and insert two black test pens into two black "function test terminals";

[0031] The digital multimeter indicates the resistance value of the channel and should meet the requirements.

[0032] In a fourth aspect, the present application also provides a method for testing an angle of attack sensor and a zero adjuster of an air data system, the method comprising:

[0033] Connect X3 to the zero adjuster cable and X4 to the angle of attack sensor cable. Adjust the angle of attack sensor wind vane positions respectively, select the measured channel through the S9 switch, and the digital multimeter will indicate the output DC voltage amplitude of the measured channel;

[0034] Turn S14 to the "measurement" position;

[0035] Switch S13 to "Components";

[0036] Switch S10 to "Single"; zero each channel on the angular position gauge;

[0037] Switch S10 to "Joint Test";

[0038] Switch S8 to "GGT";

[0039] Connect the digital multimeter to the tester through the "function test terminal", select the voltage test on the digital multimeter, connect the red test lead to the "function test terminal +", and the black test lead to the "function test terminal -";

[0040] Select the test channel via the S9 switch;

[0041] Turn the angle of attack sensor to the desired angle;

[0042] Adjust the compensation potentiometer of the corresponding channel on the product, and the indication of the digital multimeter will be the amplitude of the DC output voltage of the measured channel.

[0043] In a fifth aspect, the present application also provides a device for testing an atmospheric data system sensor, the device comprising:

[0044] The front panel of the chassis is equipped with a power switch S1, a power indicator light, a heating power switch S2, a heating power indicator light, a signal switching switch, a DC power supply voltmeter, a DC ammeter, an AC power supply voltmeter, an AC ammeter, a pointer-type DC voltmeter, a digital percentage display voltmeter, a digital temperature meter, a panel meter metering jack, a function test terminal, a sensor electrical connection signal detection hole, and a zero regulator input test voltage adjustment knob;

[0045] The rear panel of the chassis is equipped with a power supply electrical connection socket, an adjustable voltage output jack, a voltage adjustment knob, an AC115V fuse, a DC28V fuse, a DC ammeter calibration switch, and an AC ammeter calibration switch;

[0046] Among them, a working power supply and an adjustable precision power supply are installed inside the chassis.

[0047] Preferably, the signal switching switch includes S3: base heating switch; S4: shell heating switch; S5 wind vane heating switch; S6: temperature sensor selection switch; S7: temperature sensor heating switch; S8: functional test selection switch; S9 zero position regulator output channel selection switch: S10: joint test / zero position regulator single test selection switch; S11 angle of attack sensor output channel selection switch S12: angle of attack sensor voltage / resistance selection switch; S13: angle of attack sensor system / component test selection switch.

[0048] Beneficial technical effects of this application:

[0049] 1) High integration and wide application range. The test equipment can meet the function and performance tests of multiple models of angle of attack sensors, sideslip angle sensors, zero position regulators, and temperature sensors; it can meet the matching tests of angle of attack sensors / sideslip angle sensors and zero position regulators;

[0050] 2) The equipment adopts modular design, and the selected modules are universal and replaceable products. The structural design takes into account the convenience of installation and disassembly to ensure the accessibility and interchangeability of equipment maintenance. Under the specified conditions of use, the equipment does not require major repairs, but only repairs, measurements and parameter adjustments;

[0051] 3) During the design, a dual-purpose external measurement and calibration interface is reserved to facilitate on-site measurement of the instrument and system testing.

[0052] 4) During the design, a signal detection port is reserved to facilitate equipment maintenance and fault detection;

[0053] 5) Strong multi-channel testing capability and fast model switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1-1 is a schematic diagram of the front panel of the test chassis provided in an embodiment of the present application;

[0055] Figure 1-2 is a schematic diagram of the rear panel of a test chassis provided in an embodiment of the present application;

[0056] Figure 2 Design schematics for the system in detail;

[0057] Figure 3 Test principle block diagram for zero regulator;

[0058] Figure 4 Principle block diagram for angle of attack and sideslip angle sensor testing;

[0059] Figure 5 This is the principle block diagram of the atmospheric total temperature sensor test;

[0060] Figure 6 This is the principle block diagram of the joint test of the zero position regulator and the angle of attack and sideslip angle sensors. DETAILED DESCRIPTION

[0061] The present invention belongs to the field of aviation technology (aircraft function test and detection), and relates to a sensor test device and method for an atmospheric data system of a medium-sized medium-range transport aircraft, which is suitable for functional performance testing of a zero position regulator, an angle of attack sensor, a sideslip angle sensor and an atmospheric temperature sensor in the atmospheric data system.

[0062] Please refer to Figures 1 to Figure 6 , the test equipment consists of Figure 1-1 and Figure 1-2 As shown, an atmospheric data sensor test device is provided, which includes a chassis, a working power supply and an adjustable precision power supply. The chassis panel is equipped with switches, sockets, indicator lights, voltmeters, ammeters, test holes, adjustment knobs, etc. The power supply is installed in the chassis, and the components are connected by circuits.

[0063] The front panel of the chassis is equipped with a 28V power switch, a 28V power indicator light; a 115V heating power switch, a 115V heating power indicator light; sensor electrical connection sockets (X1~X4), a signal switching switch (S3~S13), a DC power supply voltmeter, a DC ammeter, an AC 115V power supply voltmeter, an AC ammeter, a pointer-type DC voltmeter, a digital percentage display voltmeter, a digital temperature meter, a panel instrument measurement jack, a functional test terminal, a sensor electrical connection signal detection hole, a zero regulator input test voltage adjustment knob (coarse and fine adjustment), etc.

[0064] The rear panel of the test box is equipped with: power supply electrical connection socket, 0-20V adjustable voltage output jack, voltage adjustment knob, AC115V fuse, DC28V fuse, DC 28V ammeter calibration switch and AC 115V ammeter calibration switch.

[0065] The electrical components on the front panel and the rear panel of the test chassis are connected to the working power supply and the adjustable precision power supply installed in the chassis through circuits to realize the test function.

[0066] Test Equipment Design Principles

[0067] The test equipment is connected to the product under test through the sensor electrical connection sockets X1~X4, the DC power supply U1~U4 provides the product working voltage, and the switches S1~S15 and internal circuits are used to realize signal multiplexing: including the selection of the product under test, channel and test items. The signal collection of the product under test is directly displayed on the voltmeter and ammeter.

[0068] The detailed working principle of the system is as follows Figure 2 shown.

[0069] Test the functions of each component of the equipment

[0070] The functions of each component of the system are as follows:

[0071] Test chassis front panel:

[0072] DC power switch S1: 28V power switch, controls the on / off of the external 28V power supply;

[0073] AC power switch S2: 115V heating power switch, controls the on / off of the external 115V power supply;

[0074] Signal switching switch S3: When it is continuously placed in the on position, 115V is supplied to the angle of attack sensor base heating circuit, and the angle of attack sensor base starts to heat up;

[0075] Signal switching switch S4: When it is continuously placed in the on position, AC115V is supplied to the angle of attack / sideslip angle sensor housing heating circuit, and the angle of attack sensor housing starts to heat;

[0076] Signal switching switch S5: When it is continuously placed in the on position, AC 115V is supplied to the angle of attack / sideslip angle sensor wind vane heating circuit, and the angle of attack sensor wind vane starts to heat;

[0077] Signal switching switch S6: temperature sensor selection switch, used for testing and selecting two different types of temperature sensors;

[0078] Signal switching switch S7: When it is continuously placed in the on position, 28V is supplied to the temperature sensor heating circuit, and the temperature sensor starts heating;

[0079] Functional test selection switch S8: used to select the test object: angle of attack sensor / zero position adjuster / temperature sensor;

[0080] S9 zero regulator output channel selection switch: used to select the 1st to 6th channels of the zero regulator output of the tested object;

[0081] S10: Zero position regulator joint test / single unit test selection switch. When it is in the "joint test" position, it is used for the matching test of the angle of attack sensor and the zero position regulator; when it is in the "single unit" position, it is used for the separate test of the angle of attack sensor and the zero position regulator.

[0082] S11: Angle of attack / sideslip angle sensor output channel selection switch, used to select angle of attack / sideslip angle sensor output channels 1 to 6;

[0083] S12: Angle of attack sensor voltage / resistance selection switch. When it is in the "voltage" position, it is used for the output voltage test of the angle of attack / sideslip angle sensor; when it is in the "resistance" position, it is used for the resistance test of the output channel of the angle of attack / sideslip angle sensor;

[0084] S13: Angle of attack sensor system / component test selection switch. When it is placed in the "system" position, the angle of attack / sideslip angle and zero position adjuster joint test can be carried out. When it is placed in the "component" position, the angle of attack / sideslip angle can be tested separately.

[0085] DC power supply voltage meter: When S1 is in the on position, it displays 28V power supply voltage;

[0086] DC ammeter: When S1 is in the on position, it displays the current consumed by the product under test;

[0087] 28V power indicator light: When S1 is in the on position, the indicator light is on;

[0088] 115V power indicator light: When S2 is in the on position, the indicator light is on;

[0089] Voltage meter for AC 115V power supply: When S2 is in the on position, it displays the heating voltage of the angle of attack / sideslip angle sensor;

[0090] AC 115V ammeter: When S2 is in the on position, the angle of attack sensor heating current is displayed after S3 / S4 / S5 are turned on;

[0091] Pointer type DC voltmeter: used to measure the output voltage value of the angle of attack / sideslip angle sensor;

[0092] Digital percentage display voltmeter: used to measure the output percentage of the angle of attack / sideslip angle sensor;

[0093] Digital thermometer: used to measure the temperature sensed by the temperature sensor;

[0094] Sensor electrical connection socket X1: Temperature sensor test socket, used to connect to the temperature sensor when testing the temperature sensor;

[0095] Sensor electrical connection socket X2: external atmospheric machine signal, used for function expansion, is an expansion interface;

[0096] Sensor electrical connection socket X3: Zero position regulator test socket, used to connect with the zero position regulator when testing the zero position regulator;

[0097] Sensor electrical connection socket X4: socket for angle of attack / sideslip angle sensor testing, used to connect with the angle of attack / sideslip angle sensor when testing the angle of attack / sideslip angle sensor.

[0098] Zero regulator input test voltage adjustment knob (coarse adjustment and fine adjustment): used to adjust the signal size supplied to the zero regulator during the zero regulator test.

[0099] Panel meter measurement jack: used to test the voltage or current value of the voltmeter and ammeter on the panel;

[0100] Function test terminal: used to test the electrical zero voltage of the angle of attack / sideslip angle sensor wind vane when testing the angle of attack / sideslip angle sensor;

[0101] Sensor electrical connection signal detection hole: used for attack angle / side slip angle sensor output 10V voltage test;

[0102] Test chassis rear panel:

[0103] Power supply electrical connection socket: used to connect 28V and 115V power supplies for product testing;

[0104] DC 28V ammeter calibration switch S14: When the switch is in the "measurement" position, the DC 28V ammeter is connected to the test system circuit; when the switch is in the "calibration" position, the DC 28V ammeter is disconnected from the test system circuit;

[0105] AC 115V ammeter calibration switch S15: When the switch is in the "measurement" position, the AC 115V ammeter is connected to the test system circuit; when the switch is in the "calibration" position, the AC 115V ammeter is disconnected from the test system circuit;

[0106] 0~20V adjustable voltage output jack: By rotating the 28V adjustment knob on the rear panel, 0~20V voltage can be output for external use;

[0107] Voltage adjustment knob: Adjust this knob to make the 0-20V adjustable voltage output jack on the rear panel output 0-20V voltage;

[0108] AC115V fuse (3A): AC115V power supply 3A self-protection;

[0109] DC28V fuse (3A): DC28V power supply 3A self-protection;

[0110] Inside the chassis:

[0111] DC power supply U1: input is DC28V voltage, output DC15V voltage to adjustable precision power supply U2 and 10V precision power supply U3;

[0112] Adjustable precision power supply U2: input is DC15V voltage of DC power supply U1, output adjustable 0-10V voltage to zero position regulator, accuracy 0.001V;

[0113] DC power supply U3: inputs the DC15V voltage of DC power supply U1, and outputs DC10V voltage to the angle of attack sensor of the product under test;

[0114] DC power supply U4: The input voltage is DC28V, and the output voltage is DC5V for the voltmeter and ammeter.

[0115] Among them: the front panel of the chassis is equipped with a 28V power switch (S1), a 28V power indicator light; a 115V heating power switch (S2), a 115V heating power indicator light; sensor electrical connection sockets (X1, X2, X3, X4), signal switching switches (S3: base heating switch; S4: shell heating switch; S5 wind vane heating switch; S6: temperature sensor selection switch; S7: temperature sensor heating switch; S8: function test selection switch; S9 zero regulator output channel selection switch: S10: joint test / zero Regulator single test selection switch; S11 angle of attack sensor output channel selection switch S12: angle of attack sensor voltage / resistance selection switch; S13: angle of attack sensor system / component test selection switch), DC power supply voltmeter, DC ammeter, AC 115V power supply voltmeter, AC ammeter, pointer type DC voltmeter, digital percentage display voltmeter, digital temperature meter, panel instrument measurement jack, function test terminal, sensor electrical connection signal detection hole, zero regulator input test voltage adjustment knob (coarse and fine adjustment), etc.

[0116] The rear panel of the test box is equipped with: power supply electrical connection socket, 0-20V adjustable voltage output jack, voltage adjustment knob, AC115V fuse (3A), DC28V fuse (3A), DC 28V ammeter calibration switch and AC 115V ammeter calibration switch.

[0117] Angle of attack sensor function performance test

[0118] 1) Preparation before testing:

[0119] Set switches S14 and S15 to the "measurement" position, switch S1 to "off", switch S8 to the "GGJ" position, switch S10 to the "single piece" position, switch S12 to the "voltage" position, and switch S13 to the "component" position;

[0120] Use one end of the cable to connect to the product under test and the other end to connect to the X4 socket of the test equipment.

[0121] Connect the power cable of the atmospheric data system sensor test equipment to the DC28V power supply, and use a special cable to connect the angle of attack sensor gauge to the AC220V power supply.

[0122] Select the voltage test on the digital multimeter, connect the red test lead to the "function test terminal +", and the black test lead to the "function test terminal -".

[0123] 2) Performance Check

[0124] Set switch S1 to the "on" position and turn the angle of attack sensor wind vane to the specified angle. Turn switch S11 to the "1", "2", "3", and "4" positions in sequence and write down the values ​​displayed on the numerical voltmeter. These values ​​are the percentage measurement values ​​of each channel of the angle of attack sensor.

[0125] 3) Wind vane half-power heating test

[0126] Connect the AC115V heating power supply, turn the switch S2 to the "on" position, and the AC115V voltmeter will display 115V. Turn the S5 switch upward and keep it still, the red heating indicator light above the S2 switch should light up, and the AC digital ammeter will indicate the half-power heating current value of the wind vane.

[0127] Zero adjuster functional performance test

[0128] Connect one end of the test cable to the finished product and the other end to the X3 socket of the test equipment.

[0129] Set switch S1 to "off", S14 and S15 to "measure", S8 to "GGT", S10 to "single", S12 to "voltage", and S13 to the "component" position.

[0130] Set S1 to the "on" position and turn the S9 switch to the "1" position. Connect the red test pin of the digital multimeter to "аLi1H" and the black test pin to "LL". Adjust the coarse and fine adjustment potentiometers so that the input voltage indicates 0V on the multimeter (DC voltage range).

[0131] Select voltage test on the digital multimeter, connect the red test lead to "function test terminal +", and the black test lead to "function test terminal -".

[0132] Use a flat-blade screwdriver to adjust the potentiometer on the finished product to the positions of 0°, -2°, -4°, +2°, and +4° respectively, and turn the S9 switch to the "1" and "2" positions in turn. The indication of the digital multimeter will be the output voltage of each measured channel.

[0133] According to the above method, set the input voltage to 5V and 10V respectively, place the zero adjuster at the required check point, and record the voltage value displayed on the multimeter, which should meet the requirements.

[0134] Temperature sensor test

[0135] 1) Resistance test

[0136] Turn switch S8 to the "temperature" position;

[0137] Set the S6 switch to the channel to be tested. The upward switch is for channel 1, and the downward switch is for channel 2.

[0138] Set the working state of the digital multimeter to resistance, insert two red test pens into two red "function test terminals", and insert two black test pens into two black "function test terminals";

[0139] The digital multimeter indicates the resistance value of the channel and should meet the requirements.

[0140] 2) Test of heating current consumption

[0141] The test of the heating current of the total atmospheric temperature sensor uses a special heating cable. Connect the sensor to a DC regulated power supply, turn on the power supply, output 28V DC voltage, turn on the power switch on the cable, and the current indication on the regulated power supply is the heating consumption current, which should meet the requirements.

[0142] Angle of attack sensor and zero position adjuster matching test

[0143] Connect X3 to the zero position adjuster cable and X4 to the angle of attack sensor cable. Adjust the angle of attack sensor wind vane positions respectively, select the measured channel through the S9 switch, and the digital multimeter will indicate the output DC voltage amplitude of the measured channel.

[0144] Turn S14 to the "measurement" position;

[0145] Switch S13 to "Components";

[0146] Switch S10 to "Single"; zero each channel on the angular position gauge (see the test of the DC voltage amplitude output by the angle of attack sensor)

[0147] Switch S10 to "Joint Test";

[0148] Switch S8 to "GGT";

[0149] Connect the digital multimeter to the tester through the "function test terminal", select the voltage test on the digital multimeter, connect the red test lead to the "function test terminal +", and the black test lead to the "function test terminal -";

[0150] Select the test channel via the S9 switch;

[0151] Turn the angle of attack sensor to the desired angle;

[0152] Adjust the compensation potentiometer of the corresponding channel on the product, and the indication of the digital multimeter will be the amplitude of the DC output voltage of the measured channel.

Claims

1. A method for testing an angle of attack sensor of an air data system, characterized in that: The method comprises: Pre-test preparation; Performance check: Set switch S1 to the "on" position and turn the angle of attack sensor wind vane to the specified angle. Turn switch S11 to the "1", "2", "3", and "4" positions in sequence and write down the values ​​displayed on the numerical voltmeter. These values ​​are the percentage measurement values ​​of each channel of the angle of attack sensor. Wind vane half-power heating test: Connect the AC115V heating power supply, turn the switch S2 to the "on" position, the AC115V voltmeter displays 115V voltage; turn the S5 switch upward and keep it still, the red heating indicator light above the S2 switch should light up, and the AC digital ammeter indicates the half-power heating current value of the wind vane.

2. The method according to claim 1, characterized in that The preparation before the test includes: Set switches S14 and S15 to the "measurement" position, switch S1 to the "off" position, switch S8 to the "GGJ" position, switch S10 to the "single piece" position, switch S12 to the "voltage" position, and switch S13 to the "component" position; Use one end of the cable to connect the tested product, and the other end to the X4 socket of the test equipment; Connect the power cable of the atmospheric data system sensor test equipment to the DC28V power supply, and use a special cable to connect the angle of attack sensor gauge to the AC220V power supply; Select the voltage test mode on the digital multimeter, connect the red test lead to the "function test terminal +", and the black test lead to the "function test terminal -".

3. A method for testing an air data system zero adjuster, characterized in that: The method comprises: Connect one end of the test cable to the finished product and the other end to the X3 socket of the test equipment; Set switch S1 to "off", S14 and S15 to "measure", S8 to "GGT", S10 to "single", S12 to "voltage", and S13 to "component"; Set S1 to the "on" position and turn the S9 switch to the "1" position. Connect the red test pin of the digital multimeter to "аLi1H" and the black test pin to "LL"; adjust the coarse and fine adjustment potentiometers so that the input voltage indicates 0V on the multimeter; Select voltage test on the digital multimeter, connect the red test lead to "function test terminal +", and the black test lead to "function test terminal -"; Use a flat-blade screwdriver to adjust the potentiometer on the finished product to the positions of 0°, -2°, -4°, +2°, and +4° respectively, and turn the S9 switch to the "1" and "2" positions in turn. The indication of the digital multimeter is the output voltage of each channel under test. According to the above method, set the input voltage to 5V and 10V respectively, place the zero adjuster at the required check point, and record the voltage value displayed on the multimeter, which should meet the requirements.

4. A method for testing an air data system temperature sensor, characterized in that: The method comprises: Resistance test; Test of heating consumption current: To test the heating current of the total atmospheric temperature sensor, use a special heating cable, connect the sensor to the DC regulated power supply, turn on the power supply, output 28V DC voltage, turn on the power switch on the cable, and the current indication on the regulated power supply is the heating consumption current, which should meet the requirements.

5. The method according to claim 4, characterized in that The resistance test comprises: Turn switch S8 to the "temperature" position; Set the S6 switch to the channel to be tested. The upward switch is for channel 1, and the downward switch is for channel 2. Set the working state of the digital multimeter to resistance, insert two red test pens into two red "function test terminals", and insert two black test pens into two black "function test terminals"; The digital multimeter indicates the resistance value of the channel and should meet the requirements.

6. A method for testing an angle of attack sensor and a zero adjuster of an air data system, characterized in that: The method comprises: Connect X3 to the zero adjuster cable and X4 to the angle of attack sensor cable. Adjust the angle of attack sensor wind vane positions respectively, select the measured channel through the S9 switch, and the digital multimeter will indicate the output DC voltage amplitude of the measured channel; Turn S14 to the "measurement" position; Switch S13 to "Components"; Switch S10 to "Single Item"; Zero each channel on the angular position gauge; Switch S10 to "Joint Test"; Switch S8 to "GGT"; Connect the digital multimeter to the tester through the "function test terminal", select the voltage test on the digital multimeter, connect the red test lead to the "function test terminal +", and the black test lead to the "function test terminal -"; Select the test channel via the S9 switch; Turn the angle of attack sensor to the desired angle; Adjust the compensation potentiometer of the corresponding channel on the product, and the indication of the digital multimeter will be the amplitude of the DC output voltage of the measured channel.

7. A device for testing an air data system sensor, characterized in that: The device comprises: The front panel of the chassis is equipped with a power switch S1, a power indicator light, a heating power switch S2, a heating power indicator light, a signal switching switch, a DC power supply voltmeter, a DC ammeter, an AC power supply voltmeter, an AC ammeter, a pointer-type DC voltmeter, a digital percentage display voltmeter, a digital temperature meter, a panel meter metering jack, a function test terminal, a sensor electrical connection signal detection hole, and a zero regulator input test voltage adjustment knob; The rear panel of the chassis is equipped with a power supply electrical connection socket, an adjustable voltage output jack, a voltage adjustment knob, an AC115V fuse, a DC28V fuse, a DC ammeter calibration switch, and an AC ammeter calibration switch; Among them, a working power supply and an adjustable precision power supply are installed inside the chassis.

8. The device according to claim 7, characterized in that The signal switching switch includes S3: base heating switch; S4: shell heating switch; S5: wind vane heating switch; S6: temperature sensor selection switch; S7: temperature sensor heating switch; S8: Functional test selection switch; S9: Zero position regulator output channel selection switch; S10: Joint test / zero position regulator single test selection switch; S11: Angle of attack sensor output channel selection switch S12: Angle of attack sensor voltage / resistance selection switch; S13: Angle of attack sensor system / component test selection switch.

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