Portable testing device for digital environment pressure control system of airplane

Abstract

The invention belongs to the field of aircraft testing, and relates to a portable testing device for an aircraft digital environment pressure control system, which comprises a testing panel, a micro pump, a switching pipeline, a state simulation circuit and a power supply processing circuit, a connector (7), a switch assembly, a switching test assembly and a display assembly are arranged on the test panel; the connector is connected with a tested system; a pin in the connector is divided into two parts, one part is connected with the state simulation circuit, and the other part is connected with the display assembly; the micro pump is respectively connected with a measured system atmosphere sensor and a cabin sensor through a switching pipeline; a micro pump start / stop switch (2) in the switch assembly is connected with and controls the micro pump; the other end of the power supply processing circuit is connected with the state simulation circuit and the micro pump.

Description

Technical Field

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

[0002] As an important onboard system of the aircraft, the environmental pressure control system includes a cabin pressure controller and an exhaust valve. Its main function is to automatically adjust the cabin pressure and cabin residual pressure so that the aircraft will not suffer from structural deformation, failure of onboard equipment or poor physical condition of personnel due to low air pressure or rapid pressure changes during flight, thereby ensuring flight safety. Therefore, the working 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 "test object") is digital, fully electrified and bus-transmitted. It adopts cabin pressure change rate priority control technology based on a 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 quite different.

[0004] At present, the most commonly used method for testing environmental pressure control systems in China is to establish a simulation test cabin, place the environmental pressure control system in the simulation test cabin, and test the functions and performance of the environmental pressure control system by constantly simulating changes in the external atmospheric environment and changes in the aircraft bleed air system. After searching the patent technology to be applied for, 11 patent documents that are the same or similar to the patent technology to be applied for were retrieved, of which 9 patents are to test the environmental pressure control system by establishing a simulation test cabin. Although this technology is accurate in testing, it is bulky and has high space requirements. It requires compressed air of different pressures and flows and corresponding power supply systems. The test cost is high and it cannot be used for field troubleshooting.

[0005] Although the cabin pressure control system test bench designed by the remaining two patents has initially achieved miniaturization, it can only test individual components in the environmental pressure control system and cannot realize system joint testing. Summary of the invention

[0006] Purpose of the invention: The patent of the present invention provides a portable testing device for a digital environmental pressure control system, which can realize rapid testing of the functions and performance of the environmental pressure control system under different working conditions.

[0007] Technical Solution

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

[0009] The test panel is provided with a connector 7, a switch assembly, a transfer test assembly, and a display assembly;

[0010] 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 component;

[0011] The micro pump is connected to the atmospheric sensor and the cabin sensor of the system under test through transfer pipes;

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

[0013] 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.

[0014] Furthermore, the air extraction end of the micro pump is respectively 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;

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

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

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

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

[0019] Furthermore, 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, which is used to control the operation of the micro pump; one end of the first exhaust pipeline control switch 4-1 and the second exhaust 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 airtight starting height setting knob is connected to the state simulation circuit; the airtight starting height of the measured system is set by adjusting the airtight starting height setting knob.

[0021] Furthermore, the discrete quantity switch includes: a mode selection switch 4-3, a residual pressure selection switch 4-4, an air-ground signal switch 4-5, a gas shut-off signal switch 4-6, and an emergency pressure release switch 4-7, wherein the mode selection switch 4-3 and the residual pressure selection switch 4-4 are connected to the state simulation circuit, and the air-ground signal switch 4-5, the gas shut-off signal switch 4-6, and the emergency pressure release switch 4-7 are connected to the state simulation circuit at one end and connected to the power supply processing circuit at the other end.

[0022] Further, the transfer test component includes: 28V DC test interface 6-1, 28V ground test interface 6-2, automatic mode t test interface 6-3, common end 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, airtight starting height test interface 6-11, airtight starting height 28V test interface 6-12, automatic 1 light test interface 6-13, automatic 2 light test interface 6-14, automatic fault light test interface 6-15, emergency pressure relief test interface 6-16, air-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, the above test interfaces are respectively connected to the status simulation circuit, 11 spare test interfaces are not connected to any circuit, 1 atmospheric sensor interface 8-3 is connected to pipeline 1, and 1 cockpit sensor interface 8-4 is connected to pipeline 2.

[0023] Furthermore, the display component includes: a channel I indicator light 1-1, a channel II indicator light 1-2, and a fault indicator light 1-1, which are respectively connected to the system under test through connectors.

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

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

[0026] The left 2 pins are connected to the ground terminal - of the power processing circuit, and the right 2 pins are connected to the 28VGND test hole and the connector pin 2;

[0027] The left 3 pins are connected to the automatic end 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 end of the mode selection switch, and the right 4 pins are connected to the common end test hole and the common end pin of the connector;

[0029] The left 5 pins are connected to the manual end of the mode selection switch, and the right 5 pins are connected to the manual end R test hole and the manual end pin of the connector;

[0030] The left 6 pins are connected to the spare end of the residual pressure selection switch, and the right 6 pins are connected to the normal / spare test hole and the spare pin of the connector;

[0031] The left 7-pin is connected to the common end of the residual pressure selection switch, and the right 7-pin is connected to the normal / standby 28VDC test hole and the common pin of the connector;

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

[0033] The left 9 pins are connected to the 2 ends of the valve manual switch, and the right 9 pins are connected to the valve manual opening test hole and the connector valve manual opening pin;

[0034] The left 10 pins are connected to the 3-terminal of the valve manual switch, and the right 10 pins are connected to the valve manual 28VDC test hole and the valve manual power supply pin of the connector;

[0035] The left 11 pin is connected to the 4th terminal of the manual switch of the valve, and the right 11 pin is connected to the manual ground pin of the connector valve;

[0036] The left 12 pins are connected to the airtight starting height 1 end, and the right 12 pins are connected to the airtight starting height 1 pin of the connector;

[0037] The left 13 pin is connected to the 2nd end of the airtight starting height, the right 13 pin is connected to the 28VDC test hole of the airtight starting height, and the 2nd pin of the connector airtight starting height;

[0038] The left 14 pins are connected to the 3 ends of the airtight starting height, the right 14 pins are connected to the airtight starting height test hole, and the connector airtight starting height 3 pins;

[0039] The left 15 pin is connected to the automatic 1 light, the right 15 pin is connected to the automatic 1 light test hole, and the connector automatic 1 light pin;

[0040] The left 16 pins are connected to the auto 2 light, the right 16 pins are connected to the auto 2 light test hole and the connector auto 2 light pins;

[0041] The left 17 pin is connected to the automatic fault light, the right 17 pin is connected to the automatic fault light test hole and the connector automatic fault light pin;

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

[0043] The left 19-pin is connected to the common end of the open-ground signal switch, and the right 19-pin is connected to the open-ground signal test hole and the open-ground signal pin of the connector;

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

[0045] The left 21 pin is connected to the right of the gas shut-off signal, the right 21 pin is connected to the right test hole of the gas shut-off signal, and the right pin of the gas shut-off signal of the connector;

[0046] The left 22 pins are connected to the bus output + interface, and the right 22 pins are connected to the positive pin of the ARINC429 connector;

[0047] The left 23 pins are connected to the bus output-interface, and the right 23 pins are connected to the negative pin of the connector ARINC429;

[0048] The left 24 pin is connected to the atmospheric sensor test hole and the atmospheric sensor output pin of the connector;

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

[0050] Beneficial effects: The present invention is based on the purpose of testing the airborne system and focuses on the portable characteristics of various complex working conditions in the field, overcoming the shortcomings of the prior art. Compared with the prior art, its advantages are:

[0051] (1) The device is small in size and has a foldable pull rod and rollers, making it more convenient to carry and has no special requirements for the use environment;

[0052] (2) The device has low requirements on the external environment and only needs to provide 220VAC power supply. When testing, only conventional equipment such as multimeter and bus tester are needed;

[0053] (3) The device has complete testing functions, which can not only perform power-on self-test, automatic fault light test, various ground modal tests, sensor performance test, etc. on the object under test, but also test the function and performance of the exhaust valve components;

[0054] (4) The testing method of the device is simple and can be completed by one person;

[0055] (5) The device has low development and maintenance costs, and the maintenance process is not complicated. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The present invention patent includes 4 drawings, and the descriptions of these drawings are as follows:

[0057] Figure 1 This is the appearance diagram of the portable test device;

[0058] Figure 2 It is a diagram of the panel of the portable test device;

[0059] Figure 3 It is the block diagram of the portable test device;

[0060] Figure 4 It 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: Micro pump start / stop switch; 3: 220V power supply control switch;

[0062] 4-1: control switch of exhaust pipeline 1; 4-2: control switch of exhaust pipeline 2;

[0063] 4-3: Mode selection switch; 4-4: Residual pressure selection switch; 4-5: Open-ground signal switch;

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

[0065] 5: Airtight starting height analog 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 closing of valve; 6-9: Manual opening of valve 6-10: Manual valve (28V) 6-11: Airtight starting height; 6-12: Airtight starting height (28V); 6-13: Automatic 1 light; 6-14: Automatic 2 light; 6-15: Automatic fault light; 6-16: Emergency pressure relief; 6-17: Ground signal;

[0068] 6-18: Gas off signal left; 6-19: Gas 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 air release valve DETAILED DESCRIPTION

[0070] The patent of this invention follows the principle of "portability, completeness and systematicity" and provides multiple functions of signal simulation, signal testing and status display. In order to reduce the size and weight of the equipment, it fully considers the conventional 220V, 50HZ AC power, multimeter and oscilloscope equipment in various field environments. Therefore, its power supply and signal acquisition test are in the form of adapter interface, which is convenient for users to connect the corresponding equipment according to different test requirements.

[0071] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0072] The device is made of 450mm×350mm×200mm aluminum alloy. A foldable pull rod is installed on the back of the device and 4 rollers with a diameter of 60mm are installed on the side. Figure 1 shown.

[0073] The device panel consists of four parts: connector, switch assembly, transfer test assembly, and display assembly. Figure 2 shown.

[0074] The switch assembly includes a manual air release valve 9, a 220V power supply control switch 3, an airtight starting height simulation knob 5, a micro pump start / stop switch 2, an exhaust pipeline 1 control switch 4-1, an exhaust pipeline 2 control switch 4-2, a mode selection 4-3, a residual pressure selection 4-4, an open-ground signal 4-5, an air shut-off signal 4-6, and an emergency pressure release 4-7.

[0075] The transfer test assembly includes 21 discrete quantity transfer 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 transfer test interfaces are 28V DC test interface 6-1, 28V ground test interface 6-2, automatic mode t test interface 6-3, common end 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, valve manual closing test interface Port 6-8, valve manual opening test interface 6-9, valve manual 28V test interface 6-10, airtight starting height test interface 6-11, airtight starting height 28V test interface 6-12, automatic 1 light test interface 6-13, automatic 2 light test interface 6-14, automatic fault light test interface 6-15, emergency pressure relief test interface 6-16, open-ground signal test interface 6-17, gas closing signal left test interface 6-18, gas closing signal right test interface 6-19, sensor 1 test interface 6-20, sensor 2 test interface 6-21

[0076] The display component includes a channel I indicator light 1-1, a channel II indicator light 1-2, and a fault indicator light 1-1.

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

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

[0080] The 220V power control switch 3 adopts a KCD1 type boat switch, one end of which is connected to the 220V power connection socket, and the other end is connected to the power processing circuit, which is used to control the main power supply to be connected or disconnected.

[0081] The airtight starting height simulation knob 5 adopts a LA42DWQ type potentiometer, which is connected to the state simulation circuit and is used to set the airtight starting height value of the measured object.

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

[0083] The control switch 4-1 of the exhaust pipeline 1 adopts a button switch, one end of which is connected to the power processing circuit and the other end is connected to the normally closed solenoid valve of the pipeline 1, which is used to control the on and off of the pipeline 1.

[0084] The control switch 4-1 of the exhaust pipeline 2 adopts a button switch, one end of which is connected to the power processing circuit and the other end is connected to the normally closed solenoid valve of the pipeline 2, which is used to control the on and off of the pipeline 2.

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

[0086] The residual pressure selection 4-4 adopts a button switch, which is connected to the state simulation circuit to provide normal state or standby state control instructions to the object under test.

[0087] The air-ground signal 4-5 adopts a button switch, one end of which is connected to the state simulation circuit and the other end is connected to the power processing circuit, which is used to provide air state or ground state control instructions to the object under test.

[0088] The air shut-off signal 4-6 adopts a button switch, one end of which is connected to the state simulation circuit and the other end is connected to the power processing circuit, which is used to provide the air shut-off state control instruction of the air bleed system to the object under test.

[0089] Emergency pressure relief 4-7 adopts a button switch, one end of which is connected to the state simulation circuit and the other end is connected to the power processing circuit, which is used to provide emergency pressure relief control instructions to the object under test.

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

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

[0092] The automatic mode t test interface 6-3 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the automatic mode state signal output by the object under test.

[0093] The common terminal y test interface 6-4 adopts a banana jack, which is connected to the state simulation circuit and is used 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 jack and is connected to the state simulation circuit to collect the manual state signal output by the object under test.

[0095] The normal / standby test interface 6-6 uses a banana jack, which is connected to the state simulation circuit and is used to collect the normal / standby state signal output by the object under test.

[0096] The normal / standby 28V test interface 6-7 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the residual voltage selection input state signal output by the object under test.

[0097] The valve manual closing test interface 6-8 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the valve manual closing state signal output by the object under test.

[0098] The valve manual opening test interface 6-9 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the valve manual opening state signal output by the object under test.

[0099] The valve manual 28V test interface 6-10 adopts a banana jack and is connected to the state simulation circuit to collect the valve mode selection input state signal output by the object under test.

[0100] The airtight starting height test interface 6-11 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the airtight starting height signal output by the object under test.

[0101] The airtight starting height 28V test interface 6-12 adopts a banana jack, which 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 light test interface 6-13 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the self-test state signal output by the object under test. When the object under test works in channel 1, the automatic 1 light is on.

[0103] The automatic 2-light test interface 6-14 adopts a banana jack and is connected to the state simulation circuit to collect the self-test state signal output by the object under test. When the object under test works in channel 2, the automatic 2 light is on.

[0104] The automatic fault light test interface 6-15 adopts a banana jack, which is connected to the state simulation circuit and is used to collect the self-test state signal output by the object under test. When the object under test is in a fault, the automatic fault light will light up.

[0105] The emergency pressure relief test interface 6-16 adopts a banana jack and is connected to the status simulation circuit to check the status of the emergency pressure relief control signal.

[0106] The air-to-ground signal test interface 6-17 uses a banana jack 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 of the gas shut-off signal adopts a banana jack, which 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 of the gas shut-off signal adopts a banana jack, which 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 jack 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 jack 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 jacks and are not connected to any circuit. They are spare test interfaces and can be designed later as needed.

[0112] Two ARINC429 bus interfaces, 429TX+8-1 and 429TX-8-2, are connected with state simulation circuits to collect bus data output by the measured object.

[0113] An atmospheric sensor interface 8-3 is connected to the pipeline 1 and is used to evacuate the atmospheric sensor of the object to be measured.

[0114] A cockpit sensor interface 8-4 is connected to the pipeline 2 and is used to vacuum the cockpit sensor of the object under test.

[0115] The device is equipped with a power processing circuit inside, which uses a dual-output power supply module and can convert 220V mains electricity into 28V DC power supply to provide normal working power supply for micro pumps, state simulation circuits, pipeline control switches, etc. Its output voltage tolerance is ±1%, rated output current is 0-10.4A, output power is 500W, and it has overload, undervoltage, and 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 micro pump inside, with a maximum negative pressure of -90KPa and a maximum positive pressure of 300KPa. The product weighs only 0.65kg, which is fully capable of providing the object under test with an air pressure simulating a maximum altitude of 8,000 meters. One end is connected to the micro pump start / stop switch, which is used to input a 28V DC power supply into the micro pump power input terminal according to the state of the micro pump start / stop switch, thereby controlling the operation of the micro pump.

[0117] The device is equipped with a micro pump inside, with a maximum negative pressure of -90KPa and a maximum positive pressure of 300KPa. The product weighs only 0.65kg, which is fully capable of providing the object under test with an air pressure simulating a maximum altitude of 8,000 meters. One end is connected to the micro pump start / stop switch, which is used to input a 28V DC power supply into the micro pump power input terminal according to the state of the micro pump start / stop switch, thereby controlling the operation of the micro pump.

[0118] The device is internally configured as a state simulation circuit, one end of which is connected to the power processing circuit and the other end is connected to the connector. Figure 4 As shown, the state simulation circuit includes a transfer module, a connector, a potentiometer, a switch and other components. The design principle is: by connecting the power processing circuit, the 28V power supply is introduced into the state simulation circuit to provide status for 28V / ground discrete signals such as emergency pressure relief signals and gas shut-off signals. At the same time, the signal classification is connected to the connector through the transfer module, and by adding components such as potentiometers and switches, the selection and connection of different pin definitions of the object under test are realized, thereby realizing the simulation of various modes.

[0119] The interior of the device is configured as an exhaust pipeline, which is divided into two parts, one end of which is connected to the micro pump, and the other end is respectively connected to the atmospheric sensor interface and the cockpit sensor interface.

[0120] Two solenoid valves are arranged inside the device. One end of each solenoid valve is connected to the exhaust pipeline control switch, and the other end is connected to the branch pipeline. The solenoid valve performs opening / closing operations according to the control instructions, thereby realizing the on-off control of the pipeline.

Claims

1. A portable test device for an aircraft digital environmental pressure control system, characterized in that: include: Test panels, micro pumps, transfer lines, status simulation circuits, and power processing circuits; The test panel is provided with a connector (7), a switch component, a transfer test component, and a display component; 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 component; The micro pump is connected to the atmospheric sensor and the cabin sensor of the system under test through transfer pipes; 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 a state simulation circuit and a micro pump.

2. The device according to claim 1, characterized in that: The air extraction end of the micro pump is connected to the atmospheric sensor and the cabin sensor of the measured system 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 air release valve; The solenoid valve is connected to a first air extraction pipeline control switch (4-1) and a second air extraction pipeline control switch (4-2) in the switch assembly.

3. The device according to claim 2, characterized in that: The switch assembly includes: a control switch, a discrete quantity switch, and an airtight starting height setting knob.

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

5. The device according to claim 4, 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, and is used 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.

6. The device according to claim 5, characterized in that: The airtight starting height setting knob is connected to the state simulation circuit; the airtight starting height of the measured system is set by adjusting the airtight starting height setting knob.

7. The device according to claim 6, characterized in that: The discrete quantity switch comprises: a mode selection switch (4-3), a residual pressure selection switch (4-4), an air-ground signal switch (4-5), a gas-off signal switch (4-6), and an emergency pressure release switch (4-7), wherein the mode selection switch (4-3) and the residual pressure selection switch (4-4) are connected to the state simulation circuit, and one end of the air-ground signal switch (4-5), the gas-off signal switch (4-6), and the emergency pressure release switch (4-7) is connected to the state simulation circuit, and the other end is connected to the power supply processing circuit.

8. The device according to claim 7, characterized in that: The transfer test assembly includes: a 28V DC test interface (6-1), a 28V ground test interface (6-2), an automatic mode t test interface (6-3), a common end y test interface (6-4), a manual mode R test interface (6-5), a normal / standby test interface (6-6), a normal / standby (28V) test interface (6-7), a valve manual closing test interface (6-8), a valve manual opening test interface (6-9), a valve manual (28V) test interface (6-10), an airtight starting height test interface (6-11), an airtight starting height (28V) test interface (6-12), an automatic 1 light test interface (6-13), an automatic 2 light test interface Interface (6-14), automatic fault light test interface (6-15), emergency pressure relief test interface (6-16), air-to-ground signal test interface (6-17), air shut-off signal left test interface (6-18), air shut-off signal right test interface (6-19), atmosphere sensor test interface (6-20), cockpit sensor test interface (6-21), bus interface 429TX+ (8-1), bus interface 429TX- (8-2). The above test interfaces are respectively connected to the status simulation circuit, 11 spare test interfaces are not connected to any circuit, 1 atmosphere sensor interface (8-3) is connected to pipeline 1, and 1 cockpit sensor interface (8-4) is connected to pipeline 2.

9. The device according to claim 8, characterized in that: The display component includes: a channel I indicator light (1-1), a channel II indicator light (1-2), and a fault indicator light (1-1), which are respectively connected to the system under test through connectors.

10. The device according to claim 9, characterized in that: The state simulation circuit has one end connected to the power processing circuit and the other end connected to the connector. The state simulation circuit includes a transfer module, which includes 23 left pins and 25 right pins. Except for pins 24 and 25, the remaining pins are connected one by one on the left and right. The left pin 1 is connected to the positive terminal (+) of the power processing circuit, and the right pin 1 is connected to the 28VDC test hole and the connector pin 1. The left 2 pins are connected to the ground terminal (-) of the power processing circuit, and the right 2 pins are connected to the 28VGND test hole and connector pin 2; The left 3 pins are connected to the automatic end 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; The left 4 pins are connected to the common end of the mode selection switch, and the right 4 pins are connected to the common end test hole and the common end pin of the connector; The left 5 pins are connected to the manual end of the mode selection switch, and the right 5 pins are connected to the manual end R test hole and the manual end pin of the connector; The left 6 pins are connected to the spare end of the residual pressure selection switch, and the right 6 pins are connected to the normal / spare test hole and the spare pin of the connector; The left 7-pin is connected to the common end of the residual pressure selection switch, and the right 7-pin is connected to the normal / standby 28VDC test hole and the common pin of the connector; The left 8 pins are connected to the 1st terminal of the valve manual switch, and the right 8 pins are connected to the valve manual closing test hole and the connector valve manual closing pin; The left 9 pins are connected to the 2 ends of the valve manual switch, and the right 9 pins are connected to the valve manual opening test hole and the connector valve manual opening pin; The left 10 pins are connected to the 3-terminal of the valve manual switch, and the right 10 pins are connected to the valve manual 28VDC test hole and the valve manual power supply pin of the connector; The left 11 pin is connected to the 4th terminal of the manual switch of the valve, and the right 11 pin is connected to the manual ground pin of the connector valve; The left 12 pins are connected to the airtight starting height 1 end, and the right 12 pins are connected to the airtight starting height 1 pin of the connector; The left 13 pin is connected to the 2nd end of the airtight starting height, the right 13 pin is connected to the 28VDC test hole of the airtight starting height, and the 2nd pin of the connector airtight starting height; The left 14 pins are connected to the 3 ends of the airtight starting height, the right 14 pins are connected to the airtight starting height test hole, and the connector airtight starting height 3 pins; The left 15 pin is connected to the automatic 1 light, the right 15 pin is connected to the automatic 1 light test hole, and the connector automatic 1 light pin; The left 16 pins are connected to the auto 2 light, the right 16 pins are connected to the auto 2 light test hole and the connector auto 2 light pins; The left 17 pin is connected to the automatic fault light, the right 17 pin is connected to the automatic fault light test hole and the connector automatic fault light pin; The left 18 pin is connected to the emergency pressure relief switch, the right 18 pin is connected to the emergency pressure relief switch test hole and the connector emergency pressure relief switch pin; The left 19-pin is connected to the common end of the open-ground signal switch, and the right 19-pin is connected to the open-ground signal test hole and the open-ground signal pin of the connector; The left 20 pin is connected to the left of the gas shut-off signal, the right 20 pin is connected to the gas shut-off signal (left) test hole, and the left pin of the connector gas shut-off signal; The left 21 pin is connected to the right of the gas shut-off signal, the right 21 pin is connected to the gas shut-off signal (right) test hole, and the right pin of the connector gas shut-off signal; The left 22 pins are connected to the bus output (+) interface, and the right 22 pins are connected to the positive pin of the ARINC429 connector; The left 23 pins are connected to the bus output (-) interface, and the right 23 pins are connected to the negative pin of the ARINC429 connector; The left 24 pin is connected to the atmospheric sensor test hole and the atmospheric sensor output pin of the connector; The left 25 pin is connected to the cockpit sensor test hole and the connector cockpit sensor output pin.

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