Airborne exhaust thermometer indicator detection device

Abstract

The invention discloses an airborne exhaust thermometer indicator detection device, and relates to the field of detection, and the airborne exhaust thermometer indicator detection device comprises a voltage stabilization output module which is used for converting a power utilization voltage into a 5V voltage and supplying the 5V voltage to a reference power supply module; the reference power supply module is used for outputting 0-2.5 V stable voltage to the detection voltage output module; the system has the advantages that the power supply module is arranged, and the requirement for the available condition of a power source is low; a voltage stabilization output module is arranged to realize standard voltage stabilization and current stabilization within 5V; a reference power supply module is arranged, so that standard voltage stabilization within 2.5 V is realized, and voltage regulation can be realized according to measurement requirements; a detection voltage output module is arranged, a V-level voltage stabilizing source is changed into an mV-level voltage stabilizing source, the mV-level voltage stabilizing source is matched with signal output of the exhaust thermometer sensing module, and precision is improved; and a measurement module is arranged to give out a standard signal source in a wave band manner, so that high-precision wave band linearization output is realized.

Description

Technical Field

[0001] The invention relates to the field of detection, in particular to an airborne exhaust temperature gauge indicator detection device. Background Art

[0002] The engine is the aircraft's power plant. The onboard exhaust gas temperature gauge (ETG) primarily indicates the average fully blocked temperature (AWT) of the combustion gases exiting the turbine, reflecting the engine's thrust. Therefore, pilots must constantly monitor engine exhaust temperatures. To ensure the gauge's correct operation, it must be regularly inspected.

[0003] At present, the basic error detection points of the exhaust temperature gauge indicator on an aircraft generally include 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, and 900°C. The indicator needs to be connected in series with resistors with resistance values ​​of 2.6Ω, 2.7Ω, 2.7Ω, 2.8Ω, 2.8Ω, 2.8Ω, and 2.9Ω, respectively (different models of exhaust temperature gauges have slight differences). The input thermoelectric potential is a few millivolts or more than ten millivolts, respectively. Because the input thermoelectric potential is very small, the external series resistors in the measurement circuit are different. The current detection devices mostly use old-fashioned resistance voltage regulator testers with low measurement accuracy. This measurement device cannot meet the requirements for exhaust temperature gauge indicator detection and needs to be improved. Summary of the Invention

[0004] The object of the present invention is to provide an airborne exhaust temperature gauge indicator detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

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

[0007] The voltage stabilization output module is used to convert the power voltage into 5V voltage to supply the reference power module;

[0008] Reference power supply module, used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module;

[0009] Detection voltage output module, used to output 0-50mV detection voltage to supply measurement module;

[0010] The measuring module is used to observe the readings of the standard digital voltmeter and the indicator of the thermometer to be tested based on the input detection voltage. If the readings of both are within the allowable error range, it is judged that the indicator of the thermometer to be tested is qualified;

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

[0012] As a further solution of the present invention: the airborne exhaust temperature gauge indicator detection device further includes a power supply module for outputting a power voltage;

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

[0014] As a further solution of the present invention: the power supply module includes a transformer TR1 and a transformer TR2, the model of the transformer TR2 is W317, the input end of the transformer TR1 introduces 220V AC power, the output end of the transformer TR1 is connected to the first end and the third end of the rectifier, the second end of the rectifier is connected to the negative pole of the circuit, the fourth end of the rectifier is connected to one end of the capacitor C1, the first end of the transformer TR2, and the negative pole of the diode D1, the other end of the capacitor C1 is connected to the negative pole of the circuit, the second end of the transformer TR2 is connected to the positive pole of the diode D1, the negative pole of the diode D2, one end of the resistor R1, one end of the capacitor C3, the negative pole of the diode D3, the voltage stabilizing output module, and the indicator light module, the positive pole of the diode D2 is connected to the other end of the resistor R1, one end of the potentiometer R2, the third end of the transformer TR2, and one end of the capacitor C2, the other end of the capacitor C2 is connected to the negative pole of the circuit, the other end of the potentiometer R2 is connected to the negative pole of the circuit, the other end of the capacitor C3 is connected to the negative pole of the circuit, the positive pole of the diode D3 is connected to the negative pole of the diode D4, and the positive pole of the diode D4 is connected to the negative pole of the circuit.

[0015] As a further solution of the present invention: the voltage stabilization output module includes capacitor C4, capacitor C5, voltage regulator IC1, capacitor C6, and capacitor C7. The model of voltage regulator IC1 is W7805. The first end of voltage regulator IC1 is connected to one end of capacitor C4, one end of capacitor C5, and the power voltage. The other end of capacitor C4 is grounded and connected to the negative electrode of the circuit. The other end of capacitor C5 is connected to the negative electrode of the circuit. The third end of voltage regulator IC1 is connected to the negative electrode of the circuit. The second end of voltage regulator IC2 is connected to one end of capacitor C6, one end of capacitor C7, and the input end of reference power supply module. The other end of capacitor C6 is connected to the negative electrode of the circuit. The other end of capacitor C7 is connected to the negative electrode of the circuit.

[0016] As a further solution of the present invention: the reference power supply module includes a reference power supply IC2 and a potentiometer RP1 with an adjustment knob. The model of the reference power supply IC2 is MC1403. The first end of the reference power supply IC2 is connected to the output end of the voltage stabilization output module, the third end of the reference power supply IC2 is connected to the negative pole of the circuit, the second end 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 pole of the circuit, and the sliding end of the potentiometer RP1 with an adjustment knob is connected to the input end of the detection voltage output module.

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

[0018] As a further solution of the present invention: the measuring module includes a standard meter (i.e., a standard digital voltmeter), a meter to be tested (indicator of the thermometer to be tested), resistor R7, resistor R8, resistor R9, resistor R10, and a two-pole four-position switch S1, one end of the resistor R7 is connected to one end of the resistor R8, one end of the resistor R9, one end of the resistor R10, one end of the standard meter, and the output end of the detection voltage output module, the other end of the standard meter is connected to the negative pole of the circuit, the 2 end of the two-pole four-position switch S1 is connected to one end of the meter to be tested, the other end of the meter to be tested is connected to the negative pole of the circuit, the 7 end of the two-pole four-position switch S1 is connected to the other end of the resistor R7, the 8 end of the two-pole four-position switch S1 is connected to the other end of the resistor R8, the 9 end of the two-pole four-position switch S1 is connected to the other end of the resistor R9, and the 10 end of the two-pole four-position switch S1 is connected to the other end of the resistor R10.

[0019] As a further solution of the present invention: the airborne exhaust temperature gauge indicator detection device further includes an indicator light module for indicating the measured temperature of the indicator of the currently detected thermometer;

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

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a power supply module, and the power supply availability conditions are low; a voltage stabilization output module is set to achieve standard voltage stabilization and current stabilization within 5V; a reference power supply module is set to achieve standard voltage stabilization within 2.5V, and voltage regulation can be achieved according to measurement requirements; a detection voltage output module is set to change the V-level voltage stabilization source into the mV level, which is adapted to the signal output of the exhaust temperature meter sensor module to improve accuracy; a measurement module is set to divide the standard signal source into bands and achieve high-precision band linearization output. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a circuit diagram of an airborne exhaust temperature gauge indicator detection device. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 , an airborne exhaust temperature gauge indicator detection device, comprising:

[0025] The voltage stabilization output module is used to convert the power voltage into 5V voltage to supply the reference power module;

[0026] Reference power supply module, used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module;

[0027] Detection voltage output module, used to output 0-50mV detection voltage to supply measurement module;

[0028] The measuring module is used to observe the readings of the standard digital voltmeter and the indicator of the thermometer to be tested based on the input detection voltage. If the readings of both are within the allowable error range, it is judged that the indicator of the thermometer to be tested is qualified;

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

[0030] In this example: See Figure 1 , the airborne exhaust temperature gauge indicator detection device further includes a power supply module for outputting a power voltage;

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

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

[0033] Transformer TR1 converts 220V 50Hz AC power to 35V. A three-terminal adjustable positive integrated transformer TR2 connects a fixed resistor R1 (240Ω) between the output and adjustment terminals. By adjusting potentiometer R2, a continuously adjustable output voltage between 1.25 and 35V is achieved, providing a suitable input voltage for the subsequent voltage regulator IC1 (W7805). A 27V DC power source can also be used directly. Power availability is limited; either direct AC or a fixed 27V DC source is acceptable.

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

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

[0036] In this example: See Figure 1 The reference power supply module includes a reference power supply IC2 and a potentiometer RP1 with an adjustment knob. The model of the reference power supply IC2 is MC1403. The first end of the reference power supply IC2 is connected to the output end of the voltage regulated output module, the third end of the reference power supply IC2 is connected to the negative pole of the circuit, the second end 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 pole of the circuit, and the sliding end of the potentiometer RP1 with an adjustment knob is connected to the input end 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 wirewound tape potentiometer RP1 with a knob, it can output a stable voltage between 0 and 2.5V. This achieves standard voltage regulation within 2.5V and can be adjusted to meet measurement requirements.

[0038] In this example: See Figure 1 The detection voltage output module includes a resistor R3, a resistor R4, an amplifier AR1, an amplifier AR2, and a resistor R5. The model of the amplifier AR1 is CA3140, and the model of the amplifier AR2 is OP07. The second end of the amplifier AR1 is connected to the output end of the reference power supply module through the resistor R3. The third end of the amplifier AR1 is connected to the negative pole of the circuit. The sixth end of the amplifier AR1 is connected to the second end of the amplifier AR1 through the resistor R4. The sixth end of the amplifier AR1 is connected to the second end of the amplifier AR2 through a 10KΩ resistor. The second end of the amplifier AR2 is connected to the sixth end of the amplifier AR2 and the input end of the measurement module through the resistor R5. The third end of the amplifier AR2 is connected to the negative pole of the circuit.

[0039] High-impedance operational amplifier AR1 and ultra-low offset, low-drift voltage dual operational amplifier AR2 output a 0-50mV detection voltage for the detection device. This converts the V-level voltage regulator to the mV level, matching the exhaust temperature sensor module's signal output and improving accuracy.

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

[0041] The 0-50mV voltage input simulates the indication of the meter under test at different temperatures by adjusting the connection between terminal 2 of the two-pole four-position switch S1 and terminals 7, 8, 9, and 10, respectively. Comparison with a standard meter determines whether the meter under test passes the test. Basic error detection points: 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, and 900°C, 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 divided into bands, achieving high-precision band linearization output, ensuring accurate test results for the meter under test.

[0042] In this example: See Figure 1 , the airborne exhaust temperature gauge indicator detection device further includes an indicator light module for indicating the measured temperature of the indicator of the currently detected temperature gauge;

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

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

[0045] The working principle of the present invention is: the voltage-stabilizing output module is used to convert the power voltage into a 5V voltage to supply the reference power module; the reference power 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 temperature meter to be tested based on the input detection voltage, and if the readings of both are within the allowable error range, it is judged that the indicator of the temperature meter to be tested is qualified.

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

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An airborne exhaust temperature gauge indicator detection device, characterized in that: The airborne exhaust temperature gauge indicator detection device comprises: The voltage stabilization output module is used to convert the power voltage into 5V voltage to supply the reference power module; Reference power supply module, used to output a stable voltage of 0 to 2.5V to supply the detection voltage output module; Detection voltage output module, used to output 0-50mV detection voltage to supply measurement module; The measuring module is used to observe the readings of the standard digital voltmeter and the indicator of the thermometer to be tested based on the input detection voltage. If the readings of both are within the allowable error range, it is judged that the indicator of the thermometer to be tested is qualified; The output end of the voltage stabilization output module is connected to the input end of the reference power module, the output end of the reference power module is connected to the input end of the detection voltage output module, and the output end of the detection voltage output module is connected to the input end of the measurement module; The airborne exhaust temperature gauge indicator detection device further includes a power supply module for outputting a power voltage; The output end of the power supply module is connected to the input end of the voltage stabilizing output module.

2. The airborne exhaust temperature gauge indicator detection device according to claim 1, characterized in that: The power supply module includes a transformer TR1 and a transformer TR2. The model of the transformer TR2 is W317. The input end of the transformer TR1 introduces 220V AC power. The output end of the transformer TR1 is connected to the first and third ends of the rectifier. The second end of the rectifier is connected to the negative pole of the circuit. The fourth end of the rectifier is connected to one end of the capacitor C1, the first end of the transformer TR2, and the negative pole of the diode D1. The other end of the capacitor C1 is connected to the negative pole of the circuit. The second end of the transformer TR2 is connected to the positive pole of the diode D1, the negative pole of the diode D2, one end of the resistor R1, one end of the capacitor C3, the negative pole of the diode D3, a voltage stabilizing output module, and an indicator light module. The positive pole of the diode D2 is connected to the other end of the resistor R1, one end of the potentiometer R2, the third end of the transformer TR2, and one end of the capacitor C2. The other end of the capacitor C2 is connected to the negative pole of the circuit. The other end of the potentiometer R2 is connected to the negative pole of the circuit. The other end of the capacitor C3 is connected to the negative pole of the circuit. The positive pole of the diode D3 is connected to the negative pole of the diode D4. The positive pole of the diode D4 is connected to the negative pole of the circuit.

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

4. 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 model of the reference power supply IC2 is MC1403. The first end of the reference power supply IC2 is connected to the output end of the voltage stabilization output module, the third end of the reference power supply IC2 is connected to the negative pole of the circuit, the second end 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 pole of the circuit, and the sliding end of the potentiometer RP1 with an adjustment knob is connected to the input end of the detection voltage output module.

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

6. The airborne exhaust temperature gauge indicator detection device according to any one of claims 1 to 5, characterized in that: The measurement module includes a standard meter, a meter under test, a resistor R7, a resistor R8, a resistor R9, a resistor R10, and a two-pole four-position switch S1. One end of the resistor R7 is connected to one end of the resistor R8, one end of the resistor R9, one end of the resistor R10, one end of the standard meter, and the output end of the detection voltage output module. The other end of the standard meter is connected to the negative pole of the circuit. The 2 end 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 pole of the circuit. The 7 end of the two-pole four-position switch S1 is connected to the other end of the resistor R7, the 8 end of the two-pole four-position switch S1 is connected to the other end of the resistor R8, the 9 end of the two-pole four-position switch S1 is connected to the other end of the resistor R9, and the 10 end of the two-pole four-position switch S1 is connected to the other end of the resistor R10.

7. The airborne exhaust temperature gauge indicator detection device according to claim 6, characterized in that: The airborne exhaust temperature gauge indicator detection device further comprises an indicator light module for indicating the measured temperature of the indicator of the currently detected temperature gauge; The indicator light module includes a resistor R6, a two-pole four-position switch S1, an indicator light L1, an indicator light L2, an indicator light L3, and an indicator light L4. One end of the resistor R6 is connected to the power voltage, the other end of the resistor R6 is connected to end 1 of the two-pole four-position switch S1, the 3 end of the two-pole four-position switch S1 is connected to one end of the indicator light L1, the 4 end of the two-pole four-position switch S1 is connected to one end of the indicator light L2, the 5 end of the two-pole four-position switch S1 is connected to one end of the indicator light L3, the 6 end of the two-pole four-position switch S1 is connected to one end of the indicator light L4, the other end of the indicator light L1 is connected to the negative pole of the circuit, the other end of the indicator light L2 is connected to the negative pole of the circuit, the other end of the indicator light L3 is connected to the negative pole of the circuit, and the other end of the indicator light L4 is connected to the negative pole of the circuit.

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