An airborne exhaust temperature gauge indicator detection device

Abstract

This utility model discloses an airborne exhaust temperature gauge indicator detection device, relating to the field of detection. The airborne exhaust temperature gauge indicator detection device includes: a voltage stabilization output module for converting the applied voltage into a 5V voltage to supply a reference power supply module; and a reference power supply module for outputting a stable voltage of 0-2.5V to supply a detection voltage output module. The advantages of this utility model are: the power supply module has low power supply availability requirements; the voltage stabilization output module provides a standard 5V voltage and current source; the reference power supply module provides a standard 2.5V voltage stabilization and can be adjusted according to measurement requirements; the detection voltage output module transforms the V-level stabilization source into an mV-level one, adapting it to the signal output of the exhaust temperature gauge sensing module and improving accuracy; and the measurement module provides the standard signal source in bands, achieving high-precision band linearized output.

Description

Technical Field

[0001] This utility model relates to the field of testing, specifically a testing device for an airborne exhaust temperature gauge indicator. Background Technology

[0002] The engine is the power plant of an aircraft. The airborne exhaust temperature gauge is mainly used to indicate the average total resistance temperature of the combustion gases behind the engine turbine, reflecting the engine thrust. Therefore, pilots need to monitor the engine exhaust temperature at all times, and to ensure the correct operation of the exhaust temperature gauge, it must be checked regularly.

[0003] Currently, the basic error detection points for exhaust temperature gauge indicators on aircraft generally include 300℃, 400℃, 500℃, 600℃, 700℃, 800℃, and 900℃. The indicators require series connection checks with resistors of 2.6Ω, 2.7Ω, 2.7Ω, 2.8Ω, 2.8Ω, 2.8Ω, and 2.9Ω respectively (the values ​​vary slightly between different exhaust temperature gauge models). Their input thermoelectric potentials are a few millivolts or tens of millivolts. Due to the very small input thermoelectric potential, the external series resistors in the measurement circuit vary. Current testing devices mostly use old-fashioned resistance voltage-adjustable testers, which have low measurement accuracy. These devices cannot meet the requirements for exhaust temperature gauge indicator testing and need improvement. Utility Model Content

[0004] The purpose of this invention is to provide an airborne exhaust temperature gauge indicator detection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An airborne exhaust temperature gauge indicator detection device includes:

[0007] The voltage regulator output module is used to convert the applied voltage into a 5V voltage to supply the reference power supply module.

[0008] The reference power supply module is used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module;

[0009] The detection voltage output module is used to output a detection voltage of 0-50mV to supply the measurement module;

[0010] The measurement module is used to observe the readings of the indicators of the standard digital voltmeter and the thermometer under test based on the input detection voltage. If the readings of both are within the allowable error range, the indicator of the thermometer under test is judged to be qualified.

[0011] The output terminal of the voltage regulator module is connected to the input terminal of the reference power supply module, the output terminal of the reference power supply module is connected to the input terminal of the voltage detection output module, and the output terminal of the voltage detection output module is connected to the input terminal of the measurement module.

[0012] As a further improvement of this utility model: the airborne exhaust temperature gauge indicator detection device also includes a power supply module for outputting electrical voltage;

[0013] The output terminal of the power supply module is connected to the input terminal of the voltage regulator output module.

[0014] As a further embodiment of this utility model: the power supply module includes transformer TR1 and transformer TR2, with transformer TR2 being model W317. The input terminal of transformer TR1 receives 220V AC power. The output terminal of transformer TR1 is connected to the first and third terminals of a rectifier. The second terminal of the rectifier is connected to the negative terminal of the circuit. The fourth terminal of the rectifier is connected to one end of capacitor C1, the first terminal of transformer TR2, and the negative terminal of diode D1. The other end of capacitor C1 is connected to the negative terminal of the circuit. The second terminal of transformer TR2 is connected to the positive terminal of diode D1, the negative terminal of diode D2, one end of resistor R1, one end of capacitor C3, the negative terminal of diode D3, a voltage regulation output module, and an indicator light module. The positive terminal of diode D2 is connected to the other end of resistor R1, one end of potentiometer R2, the third terminal of transformer TR2, and one end of capacitor C2. The other end of capacitor C2 is connected to the negative terminal of the circuit. The other end of potentiometer R2 is connected to the negative terminal of the circuit. The other end of capacitor C3 is connected to the negative terminal of the circuit. The positive terminal of diode D3 is connected to the negative terminal of diode D4, and the positive terminal of diode D4 is connected to the negative terminal of the circuit.

[0015] As a further embodiment of this utility model: the voltage regulated output module includes capacitor C4, capacitor C5, voltage regulator IC1, capacitor C6, and capacitor C7. The voltage regulator IC1 is model W7805. The first terminal of voltage regulator IC1 is connected to one end of capacitor C4, one end of capacitor C5, and the applied voltage. The other end of capacitor C4 is grounded and connected to the negative terminal of the circuit. The other end of capacitor C5 is connected to the negative terminal of the circuit. The third terminal of voltage regulator IC1 is connected to the negative terminal of the circuit. The second terminal of voltage regulator IC2 is connected to one end of capacitor C6, one end of capacitor C7, and the input terminal of the reference power supply module. The other end of capacitor C6 is connected to the negative terminal of the circuit. The other end of capacitor C7 is connected to the negative terminal of the circuit.

[0016] As a further embodiment of this utility model: the reference power supply module includes a reference power supply IC2 and a potentiometer RP1 with an adjustment knob. The reference power supply IC2 is model MC1403. The first terminal of the reference power supply IC2 is connected to the output terminal of the voltage regulator output module, the third terminal of the reference power supply IC2 is connected to the negative terminal of the circuit, the second terminal of the reference power supply IC2 is connected to one end of the potentiometer RP1 with an adjustment knob, the other end of the potentiometer RP1 with an adjustment knob is connected to the negative terminal of the circuit, and the sliding terminal of the potentiometer RP1 with an adjustment knob is connected to the input terminal of the detection voltage output module.

[0017] As a further embodiment of this utility model: the voltage output detection module includes resistor R3, resistor R4, amplifier AR1, amplifier AR2, and resistor R5. Amplifier AR1 is model CA3140, amplifier AR2 is model OP07. The second terminal of amplifier AR1 is connected to the output terminal of the reference power supply module through resistor R3. The third terminal of amplifier AR1 is connected to the negative terminal of the circuit. The sixth terminal of amplifier AR1 is connected to the second terminal of amplifier AR1 through resistor R4. The sixth terminal of amplifier AR1 is connected to the second terminal of amplifier AR2 through a 10KΩ resistor. The second terminal of amplifier AR2 is connected to the sixth terminal of amplifier AR2 and the input terminal of the measurement module through resistor R5. The third terminal of amplifier AR2 is connected to the negative terminal of the circuit.

[0018] As a further embodiment of this utility model: the measuring module includes a standard meter (i.e., a standard digital voltmeter), a test meter (the indicator of the test thermometer), resistors R7, R8, R9, and R10, and a two-pole four-position switch S1. One end of resistor R7 is connected to one end of resistor R8, one end of resistor R9, one end of resistor R10, one end of the standard meter, and the output terminal of the detection voltage output module. The other end of the standard meter is connected to the negative terminal of the circuit. Terminal 2 of the two-pole four-position switch S1 is connected to one end of the test meter, and the other end of the test meter is connected to the negative terminal of the circuit. Terminal 7 of the two-pole four-position switch S1 is connected to the other end of resistor R7, terminal 8 of the two-pole four-position switch S1 is connected to the other end of resistor R8, terminal 9 of the two-pole four-position switch S1 is connected to the other end of resistor R9, and terminal 10 of the two-pole four-position switch S1 is connected to the other end of resistor R10.

[0019] As a further improvement of this utility model: the airborne exhaust temperature gauge indicator detection device also includes an indicator light module for indicating the measured temperature of the indicator of the currently tested temperature gauge;

[0020] The indicator module includes a resistor R6, a two-pole four-position switch S1, indicator lights L1, L2, L3, and L4. One end of the resistor R6 is connected to the applied voltage, and the other end of the resistor R6 is connected to terminal 1 of the two-pole four-position switch S1. Terminal 3 of the two-pole four-position switch S1 is connected to one end of indicator light L1, terminal 4 of the two-pole four-position switch S1 is connected to one end of indicator light L2, terminal 5 of the two-pole four-position switch S1 is connected to one end of indicator light L3, and terminal 6 of the two-pole four-position switch S1 is connected to one end of indicator light L4. The other end of indicator light L1, the other end of indicator light L2, the other end of indicator light L3, and the other end of indicator light L4 are all connected to the negative terminal of the circuit.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is equipped with a power supply module, which has low requirements for power supply availability; it is equipped with a voltage regulation output module to realize a standard voltage and current regulation source within 5V; it is equipped with a reference power supply module to realize a standard voltage regulation within 2.5V, and can adjust the voltage according to measurement requirements; it is equipped with a detection voltage output module to transform the V-level voltage regulation source into the mV level, which is compatible with the signal output of the exhaust temperature gauge sensing module and improves accuracy; and it is equipped with a measurement module to provide standard signal sources in different bands, realizing high-precision band linearized output. Attached Figure Description

[0022] Figure 1 This is a circuit diagram of an airborne exhaust temperature gauge indicator detection device. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 An airborne exhaust temperature gauge indicator detection device, comprising:

[0025] The voltage regulator output module is used to convert the applied voltage into a 5V voltage to supply the reference power supply module.

[0026] The reference power supply module is used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module;

[0027] The detection voltage output module is used to output a detection voltage of 0-50mV to supply the measurement module;

[0028] The measurement module is used to observe the readings of the indicators of the standard digital voltmeter and the thermometer under test based on the input detection voltage. If the readings of both are within the allowable error range, the indicator of the thermometer under test is judged to be qualified.

[0029] The output terminal of the voltage regulator module is connected to the input terminal of the reference power supply module, the output terminal of the reference power supply module is connected to the input terminal of the voltage detection output module, and the output terminal of the voltage detection output module is connected to the input terminal of the measurement module.

[0030] In this embodiment: Please refer to Figure 1 The airborne exhaust temperature gauge indicator detection device also includes a power supply module for outputting the required voltage;

[0031] The output terminal of the power supply module is connected to the input terminal of the voltage regulator output module.

[0032] In this embodiment: Please refer to Figure 1 The power supply module includes transformers TR1 and TR2. Transformer TR2 is model W317. The input terminal of transformer TR1 receives 220V AC power. The output terminal of transformer TR1 is connected to the first and third terminals of the rectifier. The second terminal of the rectifier is connected to the negative terminal of the circuit. The fourth terminal of the rectifier is connected to one end of capacitor C1, the first terminal of transformer TR2, and the negative terminal of diode D1. The other end of capacitor C1 is connected to the negative terminal of the circuit. The second terminal of transformer TR2 is connected to the positive terminal of diode D1, the negative terminal of diode D2, one end of resistor R1, one end of capacitor C3, the negative terminal of diode D3, a voltage regulator output module, and an indicator light module. The positive terminal of diode D2 is connected to the other end of resistor R1, one end of potentiometer R2, the third terminal of transformer TR2, and one end of capacitor C2. The other end of capacitor C2 is connected to the negative terminal of the circuit. The other end of potentiometer R2 is connected to the negative terminal of the circuit. The other end of capacitor C3 is connected to the negative terminal of the circuit. The positive terminal of diode D3 is connected to the negative terminal of diode D4. The positive terminal of diode D4 is connected to the negative terminal of the circuit.

[0033] Transformer TR1 converts 220V 50Hz AC power to 35V. A three-terminal adjustable positive integrated transformer TR2 is connected to a fixed resistor R1 (240Ω) between the output and adjustment terminals. By adjusting potentiometer R2, a continuously adjustable output voltage from 1.25V to 35V can be obtained to supply a suitable input voltage to the subsequent voltage regulator IC1 (W7805). Alternatively, 27V DC power can be used directly. This method has lower power requirements; direct AC connection or a fixed 27V DC connection is acceptable.

[0034] In this embodiment: Please refer to Figure 1The voltage regulator output module includes capacitor C4, capacitor C5, voltage regulator IC1, capacitor C6, and capacitor C7. The voltage regulator IC1 is model W7805. The first terminal of voltage regulator IC1 is connected to one end of capacitor C4, one end of capacitor C5, and the applied voltage. The other end of capacitor C4 is grounded and connected to the negative terminal of the circuit. The other end of capacitor C5 is connected to the negative terminal of the circuit. The third terminal of voltage regulator IC1 is connected to the negative terminal of the circuit. The second terminal of voltage regulator IC2 is connected to one end of capacitor C6, one end of capacitor C7, and the input terminal of the reference power supply module. The other end of capacitor C6 is connected to the negative terminal of the circuit. The other end of capacitor C7 is connected to the negative terminal of the circuit.

[0035] The voltage regulator IC1 has an input voltage of 14V to 35V and an output voltage of 5V, 1A to 1.5A. Capacitor C5 is used to offset the inductive effect when the input line is long to prevent the circuit from generating self-oscillation. Capacitor C6 is used to filter out high-frequency noise in the voltage to achieve a standard voltage and current source within 5V.

[0036] In this embodiment: Please refer to Figure 1 The reference power supply module includes a reference power supply IC2 and an adjustment knob potentiometer RP1. The reference power supply IC2 is model MC1403. The first terminal of the reference power supply IC2 is connected to the output terminal of the voltage regulator output module, the third terminal of the reference power supply IC2 is connected to the negative terminal of the circuit, the second terminal of the reference power supply IC2 is connected to one end of the adjustment knob potentiometer RP1, the other end of the adjustment knob potentiometer RP1 is connected to the negative terminal of the circuit, and the sliding terminal of the adjustment knob potentiometer RP1 is connected to the input terminal of the detection voltage output module.

[0037] The high-precision, low-drift bandgap reference power supply IC2 is essentially temperature-independent, with an input voltage of 4.5V to 15V and an output voltage of 2.475V to 2.525V. Therefore, as a low-voltage regulated output module, when connected to the potentiometer RP1 with a knob-wound adjustment knob, it can output a stable voltage from 0 to 2.5V. It achieves standard voltage regulation within 2.5V and can be adjusted according to measurement requirements.

[0038] In this embodiment: Please refer to Figure 1 The voltage output detection module includes resistors R3 and R4, amplifiers AR1 and AR2, and resistor R5. Amplifier AR1 is model CA3140, and amplifier AR2 is model OP07. The second terminal of amplifier AR1 is connected to the output terminal of the reference power supply module through resistor R3. The third terminal of amplifier AR1 is connected to the negative terminal of the circuit. The sixth terminal of amplifier AR1 is connected to the second terminal of amplifier AR1 through resistor R4. The sixth terminal of amplifier AR1 is connected to the second terminal of amplifier AR2 through a 10KΩ resistor. The second terminal of amplifier AR2 is connected to the sixth terminal of amplifier AR2 and the input terminal of the measurement module through resistor R5. The third terminal of amplifier AR2 is connected to the negative terminal of the circuit.

[0039] High-impedance operational amplifier AR1 and ultra-low offset, low-drift dual operational amplifier AR2 output a detection voltage of 0–50 mV for the detection device. This transforms the V-level regulated power supply into a mV-level output, adapting it to the signal output of the exhaust temperature gauge sensing module and improving accuracy.

[0040] In this embodiment: Please refer to Figure 1 The measurement module includes a standard meter (i.e., a standard digital voltmeter), a test meter (the indicator of the test thermometer), resistors R7, R8, R9, and R10, and a two-pole four-position switch S1. One end of resistor R7 is connected to one end of resistors R8, R9, and R10, one end of the standard meter, and the output terminal of the detection voltage output module. The other end of the standard meter is connected to the negative terminal of the circuit. Terminal 2 of the two-pole four-position switch S1 is connected to one end of the test meter, and the other end of the test meter is connected to the negative terminal of the circuit. Terminal 7 of the two-pole four-position switch S1 is connected to the other end of resistor R7, terminal 8 of the two-pole four-position switch S1 is connected to the other end of resistor R8, terminal 9 of the two-pole four-position switch S1 is connected to the other end of resistor R9, and terminal 10 of the two-pole four-position switch S1 is connected to the other end of resistor R10.

[0041] A 0-50mV voltage input is used. By adjusting the connection of terminal 2 of the two-pole four-position switch S1 to terminals 7, 8, 9, and 10 respectively, the indication of the meter under test under different temperature conditions is simulated. The meter's performance is then compared with a standard meter to determine its qualification. Basic error detection points are: 300℃, 400℃, 500℃, 600℃, 700℃, 800℃, and 900℃, with corresponding external circuit resistance values ​​of 2.6Ω, 2.7Ω, 2.7Ω, 2.8Ω, 2.8Ω, 2.8Ω, and 2.9Ω respectively. The standard signal source is provided in bands to achieve high-precision band linearization output, ensuring the accuracy of the meter's test results.

[0042] In this embodiment: Please refer to Figure 1 The airborne exhaust temperature gauge indicator detection device also includes an indicator light module for indicating the measured temperature of the currently tested temperature gauge.

[0043] The indicator module includes a resistor R6, a two-pole four-position switch S1, indicator lights L1, L2, L3, and L4. One end of the resistor R6 is connected to the applied voltage, and the other end of the resistor R6 is connected to terminal 1 of the two-pole four-position switch S1. Terminal 3 of the two-pole four-position switch S1 is connected to one end of indicator light L1, terminal 4 of the two-pole four-position switch S1 is connected to one end of indicator light L2, terminal 5 of the two-pole four-position switch S1 is connected to one end of indicator light L3, and terminal 6 of the two-pole four-position switch S1 is connected to one end of indicator light L4. The other end of indicator light L1, the other end of indicator light L2, the other end of indicator light L3, and the other end of indicator light L4 are all connected to the negative terminal of the circuit.

[0044] When terminal 2 of the two-pole four-position switch S1 is connected to terminals 7, 8, 9, and 10 respectively, terminal 1 of the two-pole four-position switch S1 is also connected to terminals 3, 4, 5, and 6 respectively, so that indicator lights L1, L2, L3, and L4 indicate the current measured temperature. Ensure that all temperatures are tested.

[0045] The working principle of this utility model is as follows: the voltage regulator output module is used to convert the applied voltage into a 5V voltage to supply the reference power supply module; the reference power supply module is used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module; the detection voltage output module is used to output a detection voltage of 0 to 50mV to supply the measurement module; the measurement module is used to observe the readings of the indicators of the standard digital voltmeter and the thermometer under test based on the input detection voltage. If the readings of both are within the allowable error range, the indicator of the thermometer under test is judged to be qualified.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detection device for an airborne exhaust temperature gauge indicator, characterized in that, The airborne exhaust temperature gauge indicator detection device includes: The voltage regulator output module is used to convert the applied voltage into a 5V voltage to supply the reference power supply module. The reference power supply module is used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module; The detection voltage output module is used to output a detection voltage of 0-50mV to supply the measurement module; The measurement module is used to observe the readings of the indicators of the standard digital voltmeter and the thermometer under test based on the input detection voltage. If the readings of both are within the allowable error range, the indicator of the thermometer under test is judged to be qualified. The output terminal of the voltage regulator module is connected to the input terminal of the reference power supply module, the output terminal of the reference power supply module is connected to the input terminal of the voltage detection output module, and the output terminal of the voltage detection output module is connected to the input terminal of the measurement module. The airborne exhaust temperature gauge indicator detection device also includes an indicator light module for indicating the simulated measurement temperature environment of the indicator of the currently tested temperature gauge.

2. The airborne exhaust temperature gauge indicator detection device according to claim 1, characterized in that, The airborne exhaust temperature gauge indicator detection device also includes a power supply module for outputting the required voltage; The output terminal of the power supply module is connected to the input terminal of the voltage regulator output module and the input terminal of the indicator light module.

3. The airborne exhaust temperature gauge indicator detection device according to claim 2, characterized in that, The power supply module includes transformers TR1 and TR2. Transformer TR2 is model W317. The input terminal of transformer TR1 receives 220V AC power. The output terminal of transformer TR1 is connected to the first and third terminals of a rectifier. The second terminal of the rectifier is connected to the negative terminal of the circuit. The fourth terminal of the rectifier is connected to one end of capacitor C1, the first terminal of transformer TR2, and the negative terminal of diode D1. The other end of capacitor C1 is connected to the negative terminal of the circuit. The second terminal of transformer TR2 is connected to the positive terminal of diode D1, the negative terminal of diode D2, one end of resistor R1, one end of capacitor C3, the negative terminal of diode D3, a voltage regulator output module, and an indicator light module. The positive terminal of diode D2 is connected to the other end of resistor R1, one end of potentiometer R2, the third terminal of transformer TR2, and one end of capacitor C2. The other end of capacitor C2 is connected to the negative terminal of the circuit. The other end of potentiometer R2 is connected to the negative terminal of the circuit. The other end of capacitor C3 is connected to the negative terminal of the circuit. The positive terminal of diode D3 is connected to the negative terminal of diode D4. The positive terminal of diode D4 is connected to the negative terminal of the circuit.

4. The airborne exhaust temperature gauge indicator detection device according to claim 1, characterized in that, The voltage regulator output module includes capacitor C4, capacitor C5, regulator IC1, capacitor C6, and capacitor C7. Regulator IC1 is model W7805. The first terminal of regulator IC1 is connected to one end of capacitor C4, one end of capacitor C5, and the applied voltage. The other end of capacitor C4 is grounded and connected to the negative terminal of the circuit. The other end of capacitor C5 is also connected to the negative terminal of the circuit. The third terminal of regulator IC1 is connected to the negative terminal of the circuit. The second terminal of regulator IC2 is connected to one end of capacitor C6, one end of capacitor C7, and the input terminal of the reference power supply module. The other end of capacitor C6 and the other end of capacitor C7 are also connected to the negative terminal of the circuit.

5. The airborne exhaust temperature gauge indicator detection device according to claim 1, characterized in that, The reference power supply module includes a reference power supply IC2 and a potentiometer RP1 with an adjustment knob. The reference power supply IC2 is model MC1403. The first terminal of the reference power supply IC2 is connected to the output terminal of the voltage regulator output module, the third terminal of the reference power supply IC2 is connected to the negative terminal of the circuit, the second terminal of the reference power supply IC2 is connected to one end of the potentiometer RP1 with the adjustment knob, the other end of the potentiometer RP1 with the adjustment knob is connected to the negative terminal of the circuit, and the sliding terminal of the potentiometer RP1 with the adjustment knob is connected to the input terminal of the detection voltage output module.

6. The airborne exhaust temperature gauge indicator detection device according to claim 1, characterized in that, The voltage output detection module includes resistors R3 and R4, amplifiers AR1 and AR2, and resistor R5. Amplifier AR1 is model CA3140, and amplifier AR2 is model OP07. The second terminal of amplifier AR1 is connected to the output terminal of the reference power supply module through resistor R3. The third terminal of amplifier AR1 is connected to the negative terminal of the circuit. The sixth terminal of amplifier AR1 is connected to the second terminal of amplifier AR1 through resistor R4. The sixth terminal of amplifier AR1 is connected to the second terminal of amplifier AR2 through a 10KΩ resistor. The second terminal of amplifier AR2 is connected to the sixth terminal of amplifier AR2 and the input terminal of the measurement module through resistor R5. The third terminal of amplifier AR2 is connected to the negative terminal of the circuit.

7. The airborne exhaust temperature gauge indicator detection device according to any one of claims 1 to 6, characterized in that, The measurement module includes a standard meter, a meter under test, resistors R7, R8, R9, and R10, and a two-pole four-position switch S1. One end of resistor R7 is connected to one end of resistors R8, R9, and R10, one end of the standard meter, and the output terminal of the detection voltage output module. The other end of the standard meter is connected to the negative terminal of the circuit. Terminal 2 of the two-pole four-position switch S1 is connected to one end of the meter under test, and the other end of the meter under test is connected to the negative terminal of the circuit. Terminal 7 of the two-pole four-position switch S1 is connected to the other end of resistor R7, terminal 8 of the two-pole four-position switch S1 is connected to the other end of resistor R8, terminal 9 of the two-pole four-position switch S1 is connected to the other end of resistor R9, and terminal 10 of the two-pole four-position switch S1 is connected to the other end of resistor R10.

8. The airborne exhaust temperature gauge indicator detection device according to claim 7, characterized in that, The airborne exhaust temperature gauge indicator detection device also includes an indicator light module for indicating the measured temperature of the currently tested temperature gauge. The indicator module includes a resistor R6, a two-pole four-position switch S1, indicator lights L1, L2, L3, and L4. One end of the resistor R6 is connected to the applied voltage, and the other end of the resistor R6 is connected to terminal 1 of the two-pole four-position switch S1. Terminal 3 of the two-pole four-position switch S1 is connected to one end of indicator light L1, terminal 4 of the two-pole four-position switch S1 is connected to one end of indicator light L2, terminal 5 of the two-pole four-position switch S1 is connected to one end of indicator light L3, and terminal 6 of the two-pole four-position switch S1 is connected to one end of indicator light L4. The other end of indicator light L1, the other end of indicator light L2, the other end of indicator light L3, and the other end of indicator light L4 are all connected to the negative terminal of the circuit.

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