A portable testing device for aircraft digital environmental pressure control systems

Abstract

This invention belongs to the field of aircraft testing and relates to a portable testing device for an aircraft digital environmental pressure control system, comprising: a test panel, a micro pump, a transfer pipeline, a state simulation circuit, and a power processing circuit; the test panel is provided with a connector (7), a switch assembly, a transfer test assembly, and a display assembly; the connector is connected to the system under test; the pins in the connector are divided into two parts, one part is connected to the state simulation circuit, and the other part is connected to the display assembly; the micro pump is connected to the atmospheric sensor and the cockpit sensor of the system under test respectively through the transfer pipeline; the micro pump start / stop switch (2) in the switch assembly is connected to and controls the micro pump; one end of the power processing circuit is connected to an external power source, and the other end is connected to the state simulation circuit and the micro pump.

Description

Technical Field

[0001] This invention belongs to the field of aircraft testing and relates to a portable testing device for an aircraft digital environmental pressure control system. Background Technology

[0002] As a crucial airborne system for aircraft, the environmental pressure control system includes a cabin pressure controller and exhaust valves. Its main function is to automatically regulate cabin pressure and residual pressure to prevent structural deformation, equipment failure, or poor passenger health caused by low air pressure or rapid pressure changes during flight, thereby ensuring flight safety. Therefore, the performance of the environmental pressure control system directly determines the reliability and safety of the aircraft during flight.

[0003] The environmental pressure control system (hereinafter referred to as the "object under test") is digital, fully electric, and uses bus transmission. It employs cabin pressure change rate priority control technology based on state model and intelligent servo motor drive technology. Compared with the environmental pressure control systems of other existing aircraft, its power supply method is completely different, and its working principle and interface definition are also significantly different.

[0004] Currently, the most common testing method for environmental pressure control systems in China involves establishing a simulation test chamber. The environmental pressure control system is placed within this chamber, and its functionality and performance are tested by continuously simulating changes in the external atmospheric environment and the aircraft's bleed air system. A search of the proposed patent technology yielded 11 patent documents that are identical or similar to the proposed patent technology. Nine of these patents utilize simulation test chambers to test environmental pressure control systems. While this technology offers accurate testing, it is bulky, requires ample space, necessitates the provision of compressed air at varying pressures and flow rates, and includes a corresponding power supply system. This results in high testing costs and makes it unsuitable for field troubleshooting.

[0005] The remaining two patents, while featuring a cabin pressure control system test bench that has achieved initial miniaturization, can only test individual components of the environmental pressure control system and cannot perform system-wide testing. Summary of the Invention

[0006] Objective of this invention: This invention patent provides a portable testing device for digital environmental pressure control systems, enabling rapid testing of the functions and performance of environmental pressure control systems under different working conditions.

[0007] Technical solution

[0008] A portable testing device for an aircraft digital environmental pressure control system includes: a test panel, a micro pump, a transfer pipeline, a state simulation circuit, and a power processing circuit.

[0009] The test panel includes connector 7, switch assembly, adapter test assembly, and display assembly;

[0010] The connector connects to the system under test; the pins in the connector are divided into two parts, one part connects to the status simulation circuit, and the other part connects to the display component;

[0011] The miniature pump is connected to the atmospheric sensor and the cabin sensor of the system under test via a transfer pipeline;

[0012] The micropump start / stop switch 2 in the switching assembly is connected to and controls the micropump;

[0013] One end of the power processing circuit is connected to an external power source, and the other end is connected to a status simulation circuit and a micro pump.

[0014] Furthermore, the micro pump's suction end is connected to the atmospheric sensor and cabin sensor of the system under test via a one-to-two transfer pipe; a vent valve is provided at the common end of the one-to-two transfer pipe, and a solenoid valve is provided at each of the two branch ends.

[0015] A manual switch 9 is provided on the side wall of the device to control the opening degree of the venting valve;

[0016] The first air extraction pipeline control switch 4-1 and the second air extraction pipeline control switch 4-2 are connected in the solenoid valve and switch assembly.

[0017] Furthermore, the switching assembly includes: a control switch, a discrete quantity switch, and an airtight starting height setting knob.

[0018] Furthermore, the control switch includes a 220V power control switch 3, one end of which is connected to an external power source, and the other end is connected to a power processing circuit.

[0019] Furthermore, one end of the micropump start / stop switch 2 is connected to the power processing circuit, and the other end is connected to the micropump to control the operation of the micropump; one end of the first air extraction pipeline control switch 4-1 and the second air extraction pipeline control switch 4-2 are connected to the power processing circuit, and the other end is connected to two solenoid valves respectively.

[0020] Furthermore, the airtightness starting height setting knob is connected to the state simulation circuit; the airtightness starting height of the system under test is set by adjusting the airtightness starting height setting knob.

[0021] Furthermore, the discrete quantity switch includes: mode selection switch 4-3, residual pressure selection switch 4-4, open / ground signal switch 4-5, gas shut-off signal switch 4-6, and emergency pressure relief switch 4-7. Mode selection switch 4-3 and residual pressure selection switch 4-4 are connected to the state simulation circuit. One end of open / ground signal switch 4-5, gas shut-off signal switch 4-6, and emergency pressure relief switch 4-7 are connected to the state simulation circuit, and the other end is connected to the power processing circuit.

[0022] Furthermore, the adapter test components include: 28V DC test interface 6-1, 28V ground test interface 6-2, automatic mode t test interface 6-3, common terminal y test interface 6-4, manual mode R test interface 6-5, normal / standby test interface 6-6, normal / standby 28V test interface 6-7, valve manual closing test interface 6-8, valve manual opening test interface 6-9, valve manual 28V test interface 6-10, airtightness starting height test interface 6-11, airtightness starting height 28V test interface 6-12, automatic 1-lamp test interface 6-13, automatic 2-lamp test interface 6-14 Automatic fault light test interface; 6-15 Emergency depressurization test interface; 6-16 Air-to-ground signal test interface; 6-17 Gas shut-off signal left test interface; 6-18 Gas shut-off signal right test interface; 6-19 Atmospheric sensor test interface; 6-20 Cockpit sensor test interface; 6-21 Bus interface 429TX+8-1, Bus interface 429TX-8-2. All of the above test interfaces are connected to the status simulation circuit. The 11 spare test interfaces are not connected to any circuit. One atmospheric sensor interface 8-3 is connected to pipe 1, and one cockpit sensor interface 8-4 is connected to pipe 2.

[0023] Furthermore, the display components include: Channel I indicator light 1-1, Channel II indicator light 1-2, and fault indicator light 1-1, which are connected to the system under test via connectors.

[0024] Furthermore, the state simulation circuit is connected at one end to the power processing circuit and at the other end to a connector.

[0025] The state simulation circuit includes a transition module, which has a total of 23 pins on the left and 25 pins on the right. Except for pins 24 and 25, the remaining pins are connected to the left and right sides respectively. Pin 1 on the left is connected to the positive terminal + of the power processing circuit, and pin 1 on the right is connected to the 28VDC test hole and connector pin 1.

[0026] Left pin 2 is connected to the ground terminal of the power processing circuit; right pin 2 is connected to the 28VGND test hole and connector pin 2.

[0027] The left 3 pins are connected to the automatic terminal of the mode selection switch, and the right 3 pins are connected to the automatic mode test hole and the automatic mode pin of the connector.

[0028] The left 4 pins are connected to the common terminal of the mode selection switch, and the right 4 pins are connected to the common terminal test hole and the common terminal pin of the connector.

[0029] The left pin 5 is connected to the manual terminal of the mode selection switch, and the right pin 5 is connected to the manual terminal R test hole and the manual terminal pin of the connector.

[0030] The left 6 pin is connected to the spare terminal of the residual pressure selection switch, and the right 6 pin is connected to the normal / spare test hole and the spare pin of the connector.

[0031] The left pin 7 is connected to the common terminal of the residual voltage selector switch, and the right pin 7 is connected to the normal / standby 28VDC test port and the common pin of the connector.

[0032] The left 8 pins are connected to terminal 1 of the manual valve switch, the right 8 pins are connected to the manual valve closing test hole, and the connector manual valve closing pins are connected to the connector.

[0033] The left pin 9 is connected to the two terminals of the manual switch for the valve, the right pin 9 is connected to the manual opening test hole for the valve, and the connector valve manual opening pin is connected to the connector.

[0034] The left pin 10 is connected to terminal 3 of the manual switch for the valve, and the right pin 10 is connected to the 28VDC test hole for the manual valve and the manual power supply pin for the connector valve.

[0035] Left pin 11 is connected to terminal 4 of the manual switch for the valve, and right pin 11 is connected to the manual ground pin of the connector valve.

[0036] Left pin 12 is connected to the airtight starting height 1 end, and right pin 12 is connected to the connector airtight starting height 1 pin;

[0037] Left pin 13 is connected to the airtight starting height 2 terminal, right pin 13 is connected to the airtight starting height 28VDC test hole and connector airtight starting height 2 pin;

[0038] Left pin 14 is connected to the airtight starting height 3 terminal, right pin 14 is connected to the airtight starting height test hole, and connector airtight starting height 3 pin is connected;

[0039] Left pin 15 is connected to automatic lamp 1, right pin 15 is connected to the automatic lamp 1 test hole, and connector automatic lamp 1 pin is connected to the connector.

[0040] The left 16 pin is connected to the automatic 2 lamps, the right 16 pin is connected to the automatic 2 lamp test hole, and the connector is connected to the automatic 2 lamp pins;

[0041] Left pin 17 is connected to the automatic fault light, right pin 17 is connected to the automatic fault light test hole, and the connector automatic fault light pin is connected to the connector.

[0042] The left 18 pin is connected to the emergency pressure relief switch, and the right 18 pin is connected to the emergency pressure relief switch test hole and the connector emergency pressure relief switch pin.

[0043] Left pin 19 is connected to the common terminal of the ground signal switch, and right pin 19 is connected to the ground signal test hole and the ground signal pin of the connector.

[0044] The left pin 20 is connected to the left side of the gas shut-off signal, the right pin 20 is connected to the left test hole of the gas shut-off signal, and the connector is connected to the left pin of the gas shut-off signal.

[0045] Left pin 21 is connected to the right air-off signal pin, right pin 21 is connected to the right air-off signal test hole, and connector air-off signal pin 21 is connected to the right pin of the connector.

[0046] Left pin 22 is connected to the bus output + interface, and right pin 22 is connected to the positive terminal pin of connector ARINC429;

[0047] Left pin 23 is connected to the bus output interface, and right pin 23 is connected to the negative pin of connector ARINC429.

[0048] Pin 24 on the left is connected to the atmospheric sensor test port and the connector atmospheric sensor output pin.

[0049] The left 25 pin is connected to the cockpit sensor test hole and the connector cockpit sensor output pin.

[0050] Beneficial effects: This invention aims to achieve both the testing of airborne systems and portability under various complex field conditions, overcoming the shortcomings of existing technologies. Its advantages compared to existing technologies are:

[0051] (1) The device is small in size and has a foldable pull rod and wheels, making it more convenient to carry and requiring no special environmental conditions.

[0052] (2) The device has low requirements for the external environment. It only needs to provide a 220VAC power supply and only needs to use conventional equipment such as a multimeter and a bus tester during testing.

[0053] (3) The device has complete testing functions. It can perform power-on self-test, automatic fault light test, various ground mode test, sensor performance test, etc. on the tested object, and also test the function and performance of the exhaust valve component.

[0054] (4) The testing method of this device is simple and only requires one person to complete the operation;

[0055] (5) The device has low development and maintenance costs and the maintenance process is not complicated. Attached Figure Description

[0056] This invention patent includes 4 figures, and the descriptions of these figures are as follows:

[0057] Figure 1 This is an external image of the portable testing device;

[0058] Figure 2 This is a panel diagram of a portable testing device;

[0059] Figure 3 This is a block diagram of the portable testing device.

[0060] Figure 4 This is a state simulation circuit diagram.

[0061] 1-1: Channel I indicator light; 1-2: Channel II indicator light; 1-3: Fault indicator light; 2: Miniature pump start / stop switch; 3: 220V power control switch;

[0062] 4-1: Control switch for exhaust line 1; 4-2: Control switch for exhaust line 2;

[0063] 4-3: Mode selection switch; 4-4: Overvoltage selection switch; 4-5: Ground signal switch;

[0064] 4-6: Gas shut-off signal switch; 4-7: Emergency pressure relief switch;

[0065] 5: Airtight starting height simulation knob; 6-1: 28VDC; 6-2: 28VGND;

[0066] 6-3: Automatic mode t; 6-4: Common terminal y; 6-5: Manual mode R;

[0067] 6-6: Normal / Standby; 6-7: Normal / Standby (28V); 6-8: Manual Valve Closing; 6-9: Manual Valve Opening; 6-10: Manual Valve Opening (28V); 6-11: Airtight Starting Height; 6-12: Airtight Starting Height (28V); 6-13: Automatic 1-Light Indicator; 6-14: Automatic 2-Light Indicator; 6-15: Automatic Fault Indicator; 6-16: Emergency Depressurization; 6-17: Air-to-Ground Signal;

[0068] 6-18: Gas shut-off signal left; 6-19: Gas shut-off signal right; 6-20: Motor 1 control; 6-21: Motor 2 control; 7: Connector; 8-1: 429TX+;

[0069] 8-2: 429TX-; 8-3: Atmospheric sensor interface; 8-4: Cockpit sensor interface; 9: Manual vent valve Detailed Implementation

[0070] This invention patent, in accordance with the principles of "portability, completeness, and systematicness," provides multiple functions including signal simulation, signal testing, and status display. To reduce the size and weight of the equipment, it fully considers the availability of conventional 220V, 50Hz AC mains power, multimeters, and oscilloscopes in various field environments. Therefore, its power supply and signal acquisition testing both adopt adapter interfaces, allowing users to connect corresponding equipment according to different testing needs.

[0071] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0072] The device is made of 450mm×350mm×200mm aluminum alloy. It features a foldable pull rod on the back and four 60mm diameter rollers on the side. The main body of the device is as follows... Figure 1 As shown.

[0073] The device panel consists of four parts: connectors, switch components, adapter test components, and display components, such as... Figure 2 As shown.

[0074] The switching assembly includes a manual vent valve 9, a 220V power control switch 3, an airtight starting height simulation knob 5, a micro pump start / stop switch 2, a venting line 1 control switch 4-1, a venting line 2 control switch 4-2, a mode selection 4-3, a residual pressure selection 4-4, an air-to-ground signal 4-5, a shut-off signal 4-6, and an emergency depressurization function 4-7.

[0075] The adapter test suite includes 21 discrete quantity adapter test interfaces, 11 spare test interfaces, 2 ARINC429 bus interfaces, 1 atmospheric sensor interface 8-3, and 1 cockpit sensor interface 8-4. The discrete quantity adapter test interfaces are: 28V DC test interface 6-1, 28V ground test interface 6-2, automatic mode t test interface 6-3, common terminal y test interface 6-4, manual mode R test interface 6-5, normal / spare test interface 6-6, normal / spare 28V test interface 6-7, and manual valve closing test interface. 6-8. Manual valve opening test interface; 6-9. Manual valve 28V test interface; 6-10. Air tightness starting height test interface; 6-11. Air tightness starting height 28V test interface; 6-12. Automatic 1-lamp test interface; 6-13. Automatic 2-lamp test interface; 6-14. Automatic fault lamp test interface; 6-15. Emergency depressurization test interface; 6-16. Air-to-ground signal test interface; 6-17. Gas shut-off signal left test interface; 6-18. Gas shut-off signal right test interface; 6-19. Sensor 1 test interface; 6-20. Sensor 2 test interface; 6-21.

[0076] The display components include Channel I indicator light 1-1, Channel II indicator light 1-2, and fault indicator light 1-1.

[0077] One end of connector 7 is connected to the object under test, and the other end is connected to the state simulation circuit and the display component respectively. The pins in the connector connected to the state simulation circuit are mainly used to receive control signals and send control commands to the object under test. The pins in the connector connected to the display component are mainly used to collect the signals output by the object under test.

[0078] One end of connector 7 is connected to the object under test, and the other end is connected to the state simulation circuit and the display component respectively. The pins in the connector connected to the state simulation circuit are mainly used to receive control signals and send control commands to the object under test. The pins in the connector connected to the display component are mainly used to collect the signals output by the object under test.

[0079] The manual vent valve 9 is made of 304 stainless steel and has a maximum nominal pressure of 20MPa. It is connected to the main venting pipeline and is used to restore the negative pressure of the venting pipeline to normal pressure.

[0080] The 220V power control switch 3 adopts a KCD1 type rocker switch, with one end connected to the 220V power connection socket and the other end connected to the power processing circuit, used to control the main power supply to be turned on or off.

[0081] The airtightness starting height simulation knob 5 uses an LA42DWQ potentiometer, which is connected to the state simulation circuit to set the airtightness starting height value of the object being tested.

[0082] The micro pump start / stop switch 2 is a push-button switch, with one end connected to the power processing circuit and the other end connected to the micro pump, used to control the micro pump to start or stop.

[0083] The control switch 4-1 for the air extraction pipeline 1 is a toggle switch, with one end connected to the power processing circuit and the other end connected to the normally closed solenoid valve of pipeline 1, used to control the on / off state of pipeline 1.

[0084] The control switch 4-1 for the air extraction pipeline 2 is a toggle switch, with one end connected to the power processing circuit and the other end connected to the normally closed solenoid valve of pipeline 2, used to control the on / off state of pipeline 2.

[0085] The mode selection switch 4-3 is a toggle switch connected to the state simulation circuit, used to provide automatic or manual state control commands to the object under test.

[0086] The residual pressure selection 4-4 uses a toggle switch connected to the status simulation circuit to provide control commands for normal or standby status to the object under test.

[0087] The air-to-ground signal 4-5 uses a toggle switch, with one end connected to the status simulation circuit and the other end connected to the power processing circuit, to provide air or ground status control commands to the object under test.

[0088] The gas shut-off signal 4-6 uses a toggle switch, with one end connected to the status simulation circuit and the other end connected to the power processing circuit, to provide the gas shut-off status control command of the gas purging system to the object under test.

[0089] Emergency pressure relief 4-7 uses a toggle switch, with one end connected to the status simulation circuit and the other end connected to the power processing circuit, to provide emergency pressure relief control commands to the object under test.

[0090] The 28V DC test interface 6-1 uses a banana plug and is connected to the status simulation circuit to collect the power supply voltage of the object under test.

[0091] The 28V ground test interface 6-2 uses a banana plug and is connected to the status simulation circuit to collect the grounding signal of the object under test.

[0092] The automatic mode test interface 6-3 uses a banana plug and is connected to the status simulation circuit to collect the automatic mode status signal output by the object under test.

[0093] The common terminal test interface 6-4 uses a banana plug and is connected to the state simulation circuit to collect the modal common terminal state signal output by the object under test.

[0094] The manual mode R test interface 6-5 uses a banana plug and is connected to the status simulation circuit to collect the manual status signal output by the object under test.

[0095] The normal / standby test interface 6-6 uses a banana plug and is connected to the status simulation circuit to collect the normal / standby status signals output by the object under test.

[0096] The normal / standby 28V test interfaces 6-7 use banana plugs and are connected to the status simulation circuit to collect the residual voltage selection input status signal output by the object under test.

[0097] The manual valve closing test interface 6-8 uses a banana plug and is connected to the status simulation circuit to collect the manual valve closing status signal output by the object under test.

[0098] The manual valve opening test interface 6-9 uses a banana plug and is connected to the status simulation circuit to collect the manual valve opening status signal output by the object under test.

[0099] The manual 28V test interface 6-10 for the valve uses a banana plug and is connected to the status simulation circuit to acquire the valve mode selection input status signal output by the object under test.

[0100] The airtightness starting height test interface 6-11 uses a banana plug and is connected to the state simulation circuit to collect the airtightness starting height signal output by the object under test.

[0101] The 28V test interface 6-12 for airtight starting height uses a banana plug and is connected to the state simulation circuit to collect the airtight starting height input control signal output by the object under test.

[0102] The automatic 1-lamp test interface 6-13 uses a banana plug and is connected to the status simulation circuit to collect the self-test status signal output by the object under test. When the object under test is working in channel 1, the automatic 1-lamp will light up.

[0103] The automatic 2-lamp test interface 6-14 uses a banana plug and is connected to the status simulation circuit to collect the self-test status signal output by the object under test. When the object under test is working in channel 2, the automatic 2 lamps will light up.

[0104] The automatic fault light test interface 6-15 uses a banana plug and is connected to the status simulation circuit to collect the self-test status signal output by the object under test. When the object under test is in a fault state, the automatic fault light will illuminate.

[0105] The emergency decompression test interface 6-16 uses a banana plug and is connected to the status simulation circuit to check the status of the emergency decompression control signal.

[0106] The air-to-ground signal test interface 6-17 uses a banana plug and is connected to the status simulation circuit to check the air / ground status of the object under test.

[0107] The left test interface 6-18 for the gas shut-off signal uses a banana plug and is connected to the status simulation circuit to check the status of the gas shut-off control signal.

[0108] The right test interface 6-19 for the gas shut-off signal uses a banana plug and is connected to the status simulation circuit to check the status of the gas shut-off control signal.

[0109] The atmospheric sensor test interface 6-20 uses a banana plug and is connected to the state simulation circuit to collect the atmospheric sensor voltage output by the object under test.

[0110] The cockpit sensor test interface 6-21 uses a banana plug and is connected to the state simulation circuit to collect the cockpit sensor voltage output by the object under test.

[0111] The 11 spare test interfaces use banana plugs and are not connected to any circuits. They are spare test interfaces and can be designed as needed in the future.

[0112] Two ARINC429 bus interfaces, 429TX+8-1 and 429TX-8-2, are connected to a status simulation circuit and used to acquire the bus data output by the object under test.

[0113] One atmospheric sensor interface 8-3 is connected to pipe 1 and is used to evacuate the atmospheric sensor of the object being measured.

[0114] One cockpit sensor interface 8-4 is connected to pipe 2 and is used to evacuate the cockpit sensor of the object under test.

[0115] The device incorporates a power processing circuit with a dual-output power module. This module converts 220V AC mains power to 28V DC power, providing normal operating power for the micro pump, state simulation circuit, and pipeline control switch. Its output voltage tolerance is ±1%, rated output current is 0–10.4A, and output power is 500W. It also features overload and undervoltage protection functions. One end of the power processing circuit is connected to the 220V power control switch, and the other end is connected to the micro pump and state simulation circuit.

[0116] The device is equipped with a miniature pump, with a maximum negative pressure of -90 kPa and a maximum positive pressure of 300 kPa. The product weighs only 0.65 kg, which is sufficient to provide the test object with simulated air pressure up to 8000 meters high. One end is connected to the miniature pump start / stop switch, which is used to input 28V DC power to the miniature pump power input terminal according to the status of the miniature pump start / stop switch, thereby controlling the operation of the miniature pump.

[0117] The device is equipped with a miniature pump, with a maximum negative pressure of -90 kPa and a maximum positive pressure of 300 kPa. The product weighs only 0.65 kg, which is sufficient to provide the test object with simulated air pressure up to 8000 meters high. One end is connected to the miniature pump start / stop switch, which is used to input 28V DC power to the miniature pump power input terminal according to the status of the miniature pump start / stop switch, thereby controlling the operation of the miniature pump.

[0118] The device internally features a state simulation circuit, with one end connected to the power processing circuit and the other end connected to a connector. For example... Figure 4 As shown, the state simulation circuit consists of components such as an adapter module, connectors, potentiometers, and switches. The design principle is as follows: by connecting to the power processing circuit, a 28V power supply is introduced into the state simulation circuit to provide state information for discrete 28V / ground signals such as emergency depressurization signals and gas shut-off signals. At the same time, the adapter module classifies the signals and connects them to the connectors. By adding components such as potentiometers and switches, the selection and connection of different pin definitions of the object under test can be realized, thereby achieving the simulation of various modes.

[0119] The device is equipped with an air extraction pipeline, which is split into two parts: one end is connected to a micro pump, and the other end is connected to the atmospheric sensor interface and the cabin sensor interface, respectively.

[0120] The device is equipped with two solenoid valves. One end of each solenoid valve is connected to the control switch of the air extraction pipeline, and the other end is connected to a branch pipeline. The solenoid valves open / close according to the control command, thereby realizing the control of the pipeline on / off.

Claims

1. A portable testing device for an aircraft digital environmental pressure control system, characterized in that: include: Test panel, micro pump, transfer tubing, status simulation circuit, and power handling circuit; The test panel is equipped with a connector (7), a switch assembly, an adapter test assembly, and a display assembly; The connector connects to the system under test; the pins in the connector are divided into two parts, one part connects to the status simulation circuit, and the other part connects to the display component; The micro pump is connected to the atmospheric sensor and the cabin sensor of the system under test through a one-to-two transfer pipe; a vent valve is provided at the common end of the one-to-two transfer pipe, and a solenoid valve is provided at each of the two branch ends; a manual switch (9) is provided on the side wall of the device to control the opening of the vent valve; the solenoid valve is connected to the first air extraction pipe control switch (4-1) and the second air extraction pipe control switch (4-2) in the switch assembly; The micro pump start / stop switch (2) in the switching assembly is connected to and controls the micro pump; One end of the power processing circuit is connected to an external power source, and the other end is connected to a state simulation circuit and a micro pump. The switching assembly includes an airtight starting height setting knob, which is connected to a state simulation circuit; the airtight starting height of the system under test is set by adjusting the airtight starting height setting knob.

2. The apparatus according to claim 1, characterized in that: The switching components include: control switches and discrete quantity switches.

3. The apparatus according to claim 2, characterized in that: The control switch includes a 220V power control switch (3), one end of which is connected to an external power source and the other end is connected to a power processing circuit.

4. The apparatus according to claim 3, characterized in that: One end of the micro pump start / stop switch (2) is connected to the power processing circuit, and the other end is connected to the micro pump to control the operation of the micro pump; one end of the first air extraction pipeline control switch (4-1) and the second air extraction pipeline control switch (4-2) are connected to the power processing circuit, and the other end is connected to two solenoid valves respectively.

5. The apparatus according to claim 4, characterized in that: The discrete quantity switch includes: mode selection switch (4-3), residual pressure selection switch (4-4), air-ground signal switch (4-5), gas shut-off signal switch (4-6), and emergency pressure relief switch (4-7). Among them, mode selection switch (4-3) and residual pressure selection switch (4-4) are connected to the state simulation circuit. One end of air-ground signal switch (4-5), gas shut-off signal switch (4-6), and emergency pressure relief switch (4-7) are connected to the state simulation circuit, and the other end is connected to the power supply processing circuit.

6. The apparatus according to claim 5, characterized in that: The adapter test components include: 28V DC test interface (6-1), 28V ground test interface (6-2), automatic mode t test interface (6-3), common terminal y test interface (6-4), manual mode R test interface (6-5), normal / standby test interface (6-6), normal / standby (28V) test interface (6-7), valve manual closing test interface (6-8), valve manual opening test interface (6-9), valve manual (28V) test interface (6-10), airtightness starting height test interface (6-11), airtightness starting height (28V) test interface (6-12), automatic 1-lamp test interface (6-13), and automatic 2-lamp test interface. Interface (6-14), Automatic Fault Light Test Interface (6-15), Emergency Decompression Test Interface (6-16), Air-to-Ground Signal Test Interface (6-17), Gas Shutdown Signal Left Test Interface (6-18), Gas Shutdown Signal Right Test Interface (6-19), Atmospheric Sensor Test Interface (6-20), Cockpit Sensor Test Interface (6-21), Bus Interface 429TX+ (8-1), Bus Interface 429TX- (8-2). All of the above test interfaces are connected to the status simulation circuit. The 11 spare test interfaces are not connected to any circuit. One atmospheric sensor interface (8-3) is connected to pipe 1, and one cockpit sensor interface (8-4) is connected to pipe 2.

7. The apparatus according to claim 6, characterized in that: The display components include: Channel I indicator light (1-1), Channel II indicator light (1-2), and fault indicator light (1-3), which are connected to the system under test via connectors.

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