A civil aviation PW4000 series engine thrust reverser test control box

Abstract

The present invention discloses a test control box for a thrust reverser of a civil aviation PW4000 series engine, comprising a box body, a circuit board, and a control panel. The control panel comprises a main power switch, a cable connection socket, an indicator light array, a sensor channel selection knob, an LCD display, a return voltage display, a drive voltage display, a signal generator, a thrust reverser release / retraction control button, a DCV control channel selection knob, and a thrust reverser retraction lock / unlock control button. The LCD display displays the current sensor extension length and ratio in real time to ensure that data from each control channel meets the requirements. Furthermore, the return voltage display and the drive voltage display display display data to determine whether the voltage signal sent to the sensor and the returned voltage signal meet the requirements of the industry manual. The present invention can ensure that the performance and function of a repaired PW4000 series thrust reverser meet the relevant technical requirements, thereby reducing maintenance costs and improving maintenance efficiency.

Description

Technical Field

[0001] The present invention relates to a civil aviation PW4000 series engine thrust reverser test control box, which is a control and test tool for civil aviation PW4000 series thrust reversers and can be used for functional testing and troubleshooting of thrust reversers. Background Art

[0002] Turbofan engines on civil aircraft generally have reverse thrust devices. Their working principle is to use guide vanes to deflect the direction of the engine exhaust, tilting the jet forward to generate backward pulling force to make the aircraft slow down faster during landing roll.

[0003] After repair, the PW4000 series engine thrust reversers need to undergo performance and function tests to meet relevant technical requirements. However, China currently does not have the ability to overhaul PW4000 series engine thrust reversers. This is because: although China already has the corresponding structural and composite material and component replacement capabilities, due to the lack of key testing equipment, the PW4000 series engine thrust reversers that need repair still have to be sent to foreign original manufacturers for repair, which directly leads to high maintenance costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a civil aviation PW4000 series engine thrust reverser test control box that can significantly reduce maintenance costs and improve maintenance efficiency, and can perform performance and function tests on the refurbished PW4000 series engine thrust reverser that meet relevant technical requirements.

[0005] The purpose of the present invention is achieved through the following technical measures: a civil aviation PW4000 series engine reverse thrust device test control box, which includes a box body, a circuit board located in the box body and a control panel arranged on the box body, wherein the functional components on the control panel are connected to the corresponding circuit modules on the circuit board, and is characterized in that the functional components on the control panel include a main power switch, a cable connection socket for connecting a reverse thrust device sensor, an indicator light array, a sensor channel selection knob for selecting a sensor channel to be measured, an LCD display screen for displaying relevant parameters and abnormal data of the gear position of the sensor channel selection knob, a return voltage display screen for displaying the amplified effective value voltage signal of the sensor, a drive voltage display screen for displaying the feedback voltage signal of the sensor, and a display screen for outputting a drive signal to the sensor excitation. A signal generator at the excitation end, a thrust reverser release / retraction control button for controlling the release and retraction of the thrust reverser sensor, a DCV control channel selection knob for selecting the thrust reverser direction control valve control channel, and a thrust reverser retraction lock and unlock control button for retracting and unlocking the thrust reverser. Operating the thrust reverser retraction lock and unlock control button unlocks the retraction of the thrust reverser and the corresponding indicator light in the indicator light array lights up to indicate that the unlocking is completed. Then operate the DCV control channel selection knob to select the control channel, and operate the thrust reverser release / retraction control button to extend the thrust reverser sensor to the fully extended position and the corresponding indicator light in the indicator light array lights up. During the sensor extension process, the sensor channel is selected by operating the sensor channel selection knob so that the current extension length and ratio data of the sensor of the sensor channel are displayed on the LCD display.

[0006] When testing a thrust reverser after repair, the present invention performs relevant operations. During the extension process of the thrust reverser sensor, the LCD display screen can display the current extension length and ratio data of the sensor in real time to ensure that the data of each control channel meets the requirements. The data displayed on the return voltage display screen and the drive voltage display screen can be used to determine whether the voltage signal sent to the sensor and the return voltage signal meet the requirements of the industry manual. Therefore, the present invention can achieve performance and function testing of the repaired PW4000 series thrust reverser to ensure that it meets the relevant technical requirements, which can greatly reduce maintenance costs, shorten maintenance cycles, and improve maintenance efficiency.

[0007] The functional components on the control panel of the present invention include an indicator light test button for testing whether all indicator lights are working normally.

[0008] The functional components on the control panel of the present invention include an external measuring hole connected to the reverse thrust device sensor. The external measuring hole can be connected to a multimeter or an oscilloscope to measure the sensor data signal. This is a backup measurement method provided when the return voltage display screen or the drive voltage display screen fails.

[0009] The functional components on the control panel of the present invention include an external signal input interface for inputting a signal source. The external signal input interface is connected to a signal generator separately provided on the circuit board. The signal generator is connected to a cable connection socket via a cable, and other external signal sources can be input through this interface.

[0010] The functional components on the control panel of the present invention include an emergency stop switch that can cut off power supply.

[0011] The functional components on the control panel of the present invention include a fuse holder on which a replaceable fuse is placed and a channel indicator light for indicating the position of the sensor channel selection knob. When a short circuit occurs in this device or the reverse thrust device, the fuse will blow to prevent the line from overloading.

[0012] The functional components on the control panel of the present invention include an external 115VAC power socket for connecting 115VAC, 400HZ medium frequency AC power to drive the reverse thrust device to retract and lock, a 220VAC power input socket for providing 220VAC power input, and a 220VAC power output socket for plugging in temporary electrical equipment.

[0013] The DCV control channel selection knob of the present invention is a two-level button, which can respectively select two control channels of the reverse thrust device direction control valve.

[0014] The present invention provides a power module and a power amplifier in the box body, and the circuit module includes a logic control board, an LCD display module, a reverse thrust extension length status indication module, a reverse thrust retraction and locking control module, a proximity sensor status indication module and a signal receiving and transmitting control module, each module is connected to the logic control board respectively, and the LCD display module is connected to the LCD display switch and the LCD display provided on the control panel; the proximity sensor status indication module is connected to the corresponding indicator light in the indicator light array and the logic control board, and the proximity sensor status indication module receives the analog signal from the reverse thrust device direction control valve and the reverse thrust device retraction and locking sensor and sends it to the logic control board to determine whether the reverse thrust device sensor can be extended or retracted; the reverse thrust extension length status indication module is connected to the corresponding indicator light in the indicator light array and the LCD display module, and the logic control board calculates the extension length of the reverse thrust device sensor. and monitor sensor data abnormalities and display the sensor extension length, ratio data and abnormal data on the LCD display screen through the reverse thrust extension length status indication module, and when the sensor is extended to the fully extended position, the corresponding indicator light in the indicator light array lights up; the reverse thrust retraction and locking control module is connected to the reverse thrust retraction and locking unlocking control button and the corresponding indicator light in the indicator light array, and the reverse thrust device retraction and locking is achieved by operating the reverse thrust retraction and locking unlocking control button, and a light signal indicating the lock status is fed back to the corresponding indicator light in the indicator light array; the signal transceiver control module is connected to the power amplifier, and the signal transceiver control module can process the voltage signal returned by the reverse thrust device sensor and send it to the reverse thrust extension length status indication module and the return voltage display screen respectively, and can process the drive signal sent to the reverse thrust device sensor and send it to the cable connection socket and the drive voltage display screen respectively after amplification by the power amplifier.

[0015] The main power switch, the LCD display switch, the indicator light test button, the reverse thrust release / retraction control button, the DCV control channel selection knob and the reverse thrust retraction, locking and unlocking control button of the present invention are all integrated with status indicator lights, and the lights are on when in an available state.

[0016] Compared with the prior art, the present invention has the following significant effects:

[0017] (1) When the present invention tests the reverse thrust device after repair, after performing relevant operations, during the extension process of the reverse thrust device sensor, the LCD display screen can display the current extension length and ratio data of the sensor in real time to ensure that the data of each control channel meets the requirements, and the data displayed on the return voltage display screen and the drive voltage display screen can be used to judge whether the voltage signal sent to the sensor and the return voltage signal meet the requirements of the industry manual. Therefore, the present invention can achieve performance and function testing of the repaired PW4000 series reverse thrust device to meet the relevant technical requirements, which can greatly reduce maintenance costs, shorten maintenance cycles, and improve maintenance efficiency.

[0018] (2) The present invention has a simple structure. Multiple circuit modules are arranged on the circuit board inside the box body. The PCB board is designed and manufactured using EDA technology. This not only realizes modular production of the circuit board, but also facilitates replacement and repair when a fault occurs. Moreover, based on the modular circuit module and the currently open source programmable development environment, it has the advantages of high stability, high sampling accuracy, and customizable excitation parameters.

[0019] (3) The present invention sets an external signal input interface, which can achieve higher fault redundancy, reduce maintenance node timeouts caused by equipment failure, and minimize the economic risks brought by this problem.

[0020] (4) The present invention provides digital-to-analog conversion capabilities. The logic control board processes the corresponding sensor feedback level value after A / D conversion and displays the sensor data on the LCD screen. It can perform high-precision ratio sampling on the sensor ratio data and identify sensors that are close to failure or whose electrical parameter data are still working, thereby reducing the risk of failure after component maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention. DETAILED DESCRIPTION

[0024] like Figure 1 、 2As shown, a test control box for a thrust reverser device of a civil aviation PW4000 series engine of the present invention comprises a box body 22 hingedly connected to a box cover 21, a circuit board located in the box body 22, and a control panel provided on the box body 22. The functional components on the control panel are connected to the corresponding circuit modules on the circuit board. The functional components on the control panel 2 include an indicator light test button 21 for testing whether all indicator lights are working properly, a channel indicator light 25 for indicating the position of the sensor channel selection knob, an external measuring hole 11, an external signal input interface 26, an emergency stop switch 6, a fuse holder 12 with a replaceable fuse, an external 115VAC power socket 8 for receiving 115VAC, 400HZ medium frequency AC power to drive the thrust reverser to retract and lock, a 220VAC power input socket 10 for providing 220VAC power input, and 2 for plugging in temporary electrical equipment. 20VAC power output socket 9, main power switch 14, cable connection socket 7 for connecting thrust reverser sensor, indicator light array 13, sensor channel selection knob 20 for selecting the sensor channel to be measured, LCD display screen 17 for displaying relevant parameters and abnormal data of the gear position of the sensor channel selection knob, LCD display switch 15, return voltage display screen 18 for displaying the amplified drive effective value voltage signal of the sensor, drive voltage display screen 19 for displaying the sensor feedback voltage signal, signal generator 16 for outputting the drive signal to the sensor excitation end, thrust reverser release / retraction control button 22 for controlling the deployment and retraction of the thrust reverser sensor, DCV control channel selection knob 23 for selecting the control channel of the thrust reverser direction control valve, and thrust reverser retraction lock and unlock control button 24 for locking and unlocking the thrust reverser.

[0025] The thrust reverser is unlocked by operating the thrust reverser retraction lock unlocking control button 24, and the corresponding indicator light in the indicator array 13 lights up, indicating that the unlocking is complete. Then, the DCV control channel selection knob 23 is operated to select a control channel, and the thrust reverser release / retraction control button 22 is operated to extend the thrust reverser sensor to the fully extended position, and the corresponding indicator light in the indicator array 13 lights up. During the sensor extension process, the sensor channel is selected by operating the sensor channel selection knob 20, so that the current extension length and ratio data of the sensor channel are displayed on the LCD display 17.

[0026] The external measuring hole 11 is connected to the reverse thrust device sensor. The external measuring hole can be connected to a multimeter or an oscilloscope to measure the sensor data signal. It is a backup measurement method provided when the return voltage display screen or the drive voltage display screen fails.

[0027] The external signal input interface 26 is used to input a signal source, and is connected to a signal generator provided on the circuit board. The signal generator is connected to the cable connection socket via a cable, and other external signal sources can be input through this interface.

[0028] The DCV control channel selection knob 23 is a 2-speed button that can select the two control channels of the reverse thrust device direction control valve respectively.

[0029] The signal generator is used to generate the sinusoidal AC signal required to drive the LVDT sensor of the thrust reverser. The generated signal is sent to the PCB circuit board for gain and amplification control. The actual RMS effective voltage value and signal output are transmitted to the excitation end of the LVDT sensor of the thrust reverser as the driving signal.

[0030] The DCV control channel selector is a two-position button that selects the two control channels for the thrust reverser directional control valve. The main power switch 14, LCD display switch 15, indicator light test button 21, thrust reverser extend / retract control button 22, DCV control channel selector 23, and thrust reverser retract lock / unlock control button 24 all have integrated status indicators that illuminate when enabled.

[0031] A power supply module 1 and a power amplifier 2 are provided in the box body, and the circuit module includes a logic control board 3, an LCD display module, a reverse thrust extension length status indication module, a reverse thrust retraction and locking control module, a proximity sensor status indication module and a signal receiving and transmitting control module 4. Each module is connected to the logic control board 3 respectively, and the LCD display module is connected to the LCD display switch 15 and the LCD display 17 provided on the control panel; the proximity sensor status indication module is connected to the corresponding indicator lights in the indicator light array 13 and the logic control board 3, and the proximity sensor status indication module receives the analog signal from the reverse thrust device direction control valve and the reverse thrust device retraction and locking sensor and sends it to the logic control board 3 to judge whether the reverse thrust device sensor can be extended or retracted; the reverse thrust extension length status indication module is connected to the corresponding indicator lights in the indicator light array 13 and the LCD display module, and the logic control board 3 calculates the extension length of the reverse thrust device sensor and performs sensor data According to abnormal monitoring, the sensor extension length, ratio data and abnormal data are displayed on the LCD display screen 17 through the reverse thrust extension length status indication module, and when the sensor is extended to the fully extended position, the corresponding indicator light in the indicator light array 13 lights up; the reverse thrust retraction and locking control module is connected to the reverse thrust retraction and locking unlocking control button 24 and the corresponding indicator light in the indicator light array 13. By operating the reverse thrust retraction and locking unlocking control button 24, the reverse thrust device retraction and locking are realized, and a light signal indicating the lock state is fed back to the corresponding indicator light in the indicator light array 13; the signal transceiver control module 4 is connected to the power amplifier 2. The signal transceiver control module 4 can process the voltage signal returned by the reverse thrust device sensor and send it to the reverse thrust extension length status indication module and the return voltage display screen 18 respectively, and can process the drive signal sent to the reverse thrust device sensor and send it to the cable connection socket 7 and the drive voltage display screen 19 respectively after amplification by the power amplifier. The sensor channel selector knob 20 is connected to the logic control board 3. Operating this knob causes the logic control board 3 to receive signals displaying the current sensor channel and send signals to the signal transceiver control module 4 to switch to the corresponding channel. The thrust reverser deployment / retraction control button 22 is also connected to the logic control board 3. Operating this button illuminates the corresponding indicator light in the indicator array 13 when the thrust reverser sensor extends to the fully deployed position, or retracts the thrust reverser sensor. The DCV control channel selector knob 23 is also connected to the logic control board 3. Operating this knob selects one of the two DCV control channels.

[0032] This invention uses an adjustable digital signal source (DDS) module to generate the required reference signal. The thrust reverser is driven by a 115V 400Hz medium-frequency power supply for retraction and locking. The control box itself operates on 220VAC mains power, with an internal AC-DC converter module for voltage conversion and protective isolation.

[0033] The LCD display can show the following: current channel, real-time sensor ratio, reverse thrust extension length, unlocking status, abnormality and channel fault reminder.

[0034] The reverse thrust retraction and locking control module, represented by the power distribution board 5, controls the lock's opening and closing via a specific level drive signal. Connected to the logic control board 3, the power distribution board 5 controls the external relay energization, thereby controlling the unlocking and retraction of the reverse thrust sensor. Controlling the reverse thrust device involves sending 115V and 28V power to the reverse thrust device, which is isolated and controlled by the power distribution board 5. The reverse thrust retraction and locking control module includes a reverse thrust retraction and locking control circuit and a reverse thrust retraction and locking position indication circuit. The reverse thrust retraction and locking control circuit utilizes a single-phase medium-frequency power supply (115VAC 400Hz single-phase) consisting of an SPWM waveform drive and a DC-AC inverter circuit. The reverse thrust retraction and locking position indication circuit utilizes a high-frequency, low-voltage AC signal source. It detects the level signal returned by the sensor to determine the locking sensor position and provide an indication signal. This module can be integrated using existing circuits. The actual working process is: the logic control board will detect whether 115VAC has been connected. If it is detected that it has been connected, when the reverse push-to-lock and unlock control button 24 is pressed, the power distribution board 5 will pull the relay in to open the lock.

[0035] The proximity sensor status indicator module detects proximity sensor status through a specific high-frequency, low-voltage AC signal circuit. It includes proximity sensor distance determination circuitry and proximity sensor health assessment circuitry. It provides light and LCD indicators and displays abnormal data. Abnormal data calculations are processed by the logic control board. This module can be integrated with existing circuits.

[0036] The reverse thrust extension length status indicator module includes an LVDT (Linear Displacement Transducer) control circuit and an LVDT health assessment circuit. It calculates the reverse thrust extension distance and ratio, and provides an indication when abnormal data is detected. By comparing the drive signal level applied to the LVDT with the level signal at the LVDT's feedback terminal, a specific formula is used to calculate the LVDT's extension length. This module can be integrated with existing circuits.

[0037] The signal generator includes power supply for various sensor excitation circuits and peripheral auxiliary circuits, which is a prior art. The method of adjusting the excitation voltage is operated on the signal generator.

[0038] The present invention can perform an off-site operation test on the thrust reverser when it is disassembled for repair, and perform a complete validation of the various sensors and circuits on the thrust reverser. The specific testing process is: before conducting the test, write the sensor range and length data calibrated by the manufacturer into the MCU (logic control board), connect the hydraulic source to the thrust reverser, and connect this control box to the thrust reverser via a cable. Turn on the main power switch, turn on the DDS signal source power, press the indicator light test button, and check whether all the indicator lights on this control box can light up normally. Check the LCD display and the DCV control channel selection knob to confirm that the correct channel has been selected and the correct data is displayed. Press the reverse thrust retraction, locking, and unlocking control button to retract and unlock the thrust reverser. After pressing, the reverse thrust retraction, locking, and unlocking control button will light up to indicate that the function has been activated. When the reverser is successfully unlocked, the corresponding indicator in the control box's indicator array will illuminate, indicating successful unlocking. After unlocking, press the thrust reverser extend / retract control button, which will illuminate. The thrust reverser sensor will then move in the extension direction. The sensor's return data is transmitted via a high-precision A / D converter circuit to the MCU, which converts the digital signal into a numerical value displayed on the LCD, specifically indicating the current extension length and sensor ratio. When the thrust reverser sensor reaches the fully extended position, the "Full Extended" indicator in the control box's indicator array will illuminate, and the LCD will display "Full Extended." At any time, the DCV control channel selector knob on the control box can be used to select the corresponding data channel and the return data can be viewed on the LCD to ensure that each channel meets the required data. Specifically, the current extension length and level signal are calculated by comparing the actual value with the ratio data, thereby judging whether it exceeds the manufacturer's calibration data. For example: during the test, the reverse thrust device sensor moves to the fully extended position. If the corresponding indicator light in the indicator light array is not on, it indicates that the sensor length is insufficient and needs to be adjusted. If the corresponding indicator light in the indicator light array is on, it will further check whether the data on the LCD display is within the range required by the industry manual, and comprehensively judge whether the sensor is within the normal range. If the length exceeds the standard, it needs to be adjusted and shortened.

[0039] The present invention is based on the ATMEL MCU chip hardware environment, uses EDA software for PCB circuit layout and manufacturing, and C++ programming to realize data processing functions and LCD driver display, making the present invention highly stable. In addition, the present invention has an analog direct-reading high-precision digital display with 3 effective digits after the decimal point. The LCD display screen also obtains 10-bit resolution through the A / D conversion circuit, and the converted proportional data and extension length are displayed on the LCD in centimeters, making the present invention highly sampled. If the manufacturer changes the corresponding signal frequency or intensity range of the sensor at a later stage, the signal source of the present invention can be adjusted accordingly to match the newly configured hardware, making the present invention have the advantage of customizable excitation parameters.

[0040] The present invention can independently control or test the left or right thrust reverser, that is, different left and right docking cables are used, and the cable plug pins are arranged and marked differently (printed with LH or RH marks for distinction), so that the left or right side can be distinguished.

Claims

1. A control box for testing a thrust reverser for a PW4000 series civil aviation engine, comprising a box body, a circuit board within the box body, and a control panel mounted on the box body, wherein the functional components on the control panel are connected to corresponding circuit modules on the circuit board. The box body is characterized by: The functional components on the control panel include a main power switch, a cable connection socket for connecting a thrust reverser sensor, an indicator light array, a sensor channel selection knob for selecting a sensor channel to be measured, an LCD display for displaying relevant parameters and abnormal data of the gear position of the sensor channel selection knob, a return voltage display for displaying the amplified effective value voltage signal of the sensor, a drive voltage display for displaying the sensor feedback voltage signal, a signal generator for outputting a drive signal to the sensor excitation end, a thrust reverser release / retraction control button for controlling the release and retraction of the thrust reverser sensor, and a control button for selecting the direction control valve of the thrust reverser. Operate the DCV control channel selection knob for the control channel and the thrust reverser retraction / unlocking control button for retracting and unlocking the thrust reverser. Operate the thrust reverser retraction / unlocking control button to unlock the thrust reverser and at the same time, the corresponding indicator light in the indicator light array lights up to indicate that unlocking is completed. Then operate the DCV control channel selection knob to select the control channel, and operate the thrust reverser release / retraction control button to extend the thrust reverser sensor to the fully extended position. The corresponding indicator light in the indicator light array lights up. During the sensor extension process, operate the sensor channel selection knob to select the sensor channel so that the current extension length and ratio data of the sensor channel are displayed on the LCD display.

2. The civil aviation PW4000 series engine thrust reverser test control box according to claim 1, characterized in that: The functional components on the control panel include an indicator light test button for testing whether all indicator lights are working normally.

3. The civil aviation PW4000 series engine thrust reverser test control box according to claim 2, characterized in that: The functional components on the control panel include an external measuring hole connected to the thrust reverser sensor. The external measuring hole can be connected to a multimeter or an oscilloscope to measure the sensor data signal.

4. The civil aviation PW4000 series engine thrust reverser test control box according to claim 3, characterized in that: The functional components on the control panel include an external signal input interface for inputting a signal source, and the external signal input interface is connected to a signal generator separately arranged on the circuit board.

5. The civil aviation PW4000 series engine thrust reverser test control box according to claim 4, characterized in that: The functional components on the control panel include an emergency stop switch that can cut off power supply.

6. The civil aviation PW4000 series engine thrust reverser test control box according to claim 5, characterized in that: The functional components on the control panel include a fuse holder on which a replaceable fuse is placed and a channel indicator light for indicating the position of the sensor channel selection knob.

7. The civil aviation PW4000 series engine thrust reverser test control box according to claim 6, characterized in that: The functional components on the control panel include an external 115VAC power socket for receiving 115VAC, 400HZ medium frequency AC power to drive the reverse thrust device to retract and lock, a 220VAC power input socket for providing 220VAC power input, and a 220VAC power output socket for plugging in temporary electrical equipment.

8. The civil aviation PW4000 series engine thrust reverser test control box according to claim 7, characterized in that: The DCV control channel selection knob is a 2-speed knob that can select two control channels of the reverse thrust device direction control valve respectively.

9. The civil aviation PW4000 series engine thrust reverser test control box according to claim 8, characterized in that: A power supply module and a power amplifier are provided in the box body, and the circuit module includes a logic control board, an LCD display module, a reverse thrust extension length status indication module, a reverse thrust retraction and locking control module, a proximity sensor status indication module and a signal receiving and transmitting control module, each module is connected to the logic control board respectively, and the LCD display module is connected to the LCD display switch and the LCD display provided on the control panel; the proximity sensor status indication module is connected to the corresponding indicator light in the indicator light array and the logic control board, and the proximity sensor status indication module receives the analog signal from the reverse thrust device direction control valve and the reverse thrust device retraction and locking sensor and sends it to the logic control board to judge whether the reverse thrust device sensor can be extended or retracted; the reverse thrust extension length status indication module is connected to the corresponding indicator light in the indicator light array and the LCD display module, and the logic control board calculates the extension length and Sensor data abnormality monitoring is performed and the sensor extension length, ratio data and abnormal data are displayed on the LCD display screen through the reverse thrust extension length status indication module, and when the sensor is extended to the fully extended position, the corresponding indicator light in the indicator light array lights up; the reverse thrust retraction and locking control module is connected to the reverse thrust retraction and unlocking control button and the corresponding indicator light in the indicator light array, and the reverse thrust device retraction and locking is achieved by operating the reverse thrust retraction and unlocking control button, and a light signal indicating the lock status is fed back to the corresponding indicator light in the indicator light array; the signal transceiver control module is connected to the power amplifier, and the signal transceiver control module can process the voltage signal returned by the reverse thrust device sensor and send it to the reverse thrust extension length status indication module and the return voltage display screen respectively, and can process the drive signal sent to the reverse thrust device sensor and send it to the cable connection socket and the drive voltage display screen respectively after amplification by the power amplifier.

10. The civil aviation PW4000 series engine thrust reverser test control box according to claim 9, characterized in that: The main power switch, the LCD display switch, the indicator light test button, the reverse thrust release / retraction control button, the DCV control channel selection knob and the reverse thrust retraction, locking and unlocking control button all have their own integrated status indicator lights, and the lights will light up when they are in the available state.

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