Testing device for aircraft automatic throttle switch package assembly

Abstract

The invention discloses a testing device for an aircraft automatic throttle switch package assembly, which comprises a box body and a mounting frame mounted on the inner side of the box body, an operation panel is mounted at the top of the mounting frame, and a storage box is arranged at the left lower part of the mounting frame. A storage box cabin cover corresponding to the storage box is hinged to the top of the operation panel, and two test mounting folding frames are mounted on the storage box cabin cover; the testing device can be used for testing the automatic accelerator switch package assembly of the aircraft, is small in size, convenient to carry, safe, reliable and simple to operate, can be used for testing nine switches at the same time, is clear at a glance in testing state, and can be used for testing whether the switches are synchronous or not at the same time. And a digital multimeter can be externally connected to measure the contact resistance in each switch, so that the fault judgment accuracy of aircraft maintenance personnel and the precise adjustment of assembly correction are effectively improved, the maintenance quality and attendance rate of an aircraft are improved, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft throttle switch package testing, and in particular relates to a testing device for an aircraft automatic throttle switch package component. Background Art

[0002] The aircraft's autothrottle switch package consists of 9 contact micro switches. If any micro switch or the internal actuator of the autothrottle switch package fails, it will cause the aircraft's automatic braking system, reverse thrust system, takeoff warning, proximity switch electronic unit (PSEU) or weather radar system to fail. Therefore, the aircraft's autothrottle switch package components need to be tested;

[0003] Through on-site investigation and system analysis, it was found that during the installation, calibration and testing of the automatic throttle switch package according to the manufacturer's manual, the maintenance personnel only used a digital multimeter to measure the continuity or resistance of each microswitch in the automatic throttle switch package one by one due to the small construction work space and the lack of suitable test equipment. It was impossible to maintain continuous and reliable contact between the electrical plug pins of the automatic throttle switch package and the multimeter probe, resulting in inaccurate test and measurement results, thereby causing fault judgment errors; in order to improve the accuracy of measurement, some maintenance units made their own jumper tools to assist in measurement, but they could only measure one microswitch at a time, and could not measure the conversion status of the nine switches at the same time, especially it was impossible to judge whether S1, S2, S3 and S4, S5, S6 were converted synchronously, which led to misjudgment of faults or the inability to accurately adjust the switch conversion point during calibration, resulting in an increase in 0-hour installation fault parts and parts that were not found to be faulty (NFF) during repair inspection, causing waste of manpower and material resources and huge economic losses to maintenance units and aircraft operators;

[0004] To this end, the present invention provides a testing device for an aircraft automatic throttle switch package assembly. Summary of the invention

[0005] The object of the present invention is to provide a testing device for an aircraft automatic throttle switch package assembly to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a test device for an aircraft automatic throttle switch package assembly, comprising a box body and a mounting frame installed inside the box body, an operation panel is installed on the top of the mounting frame, a storage box is arranged at the lower left of the mounting frame, a storage box hatch cover corresponding to the storage box is hinged on the top of the operation panel, two test installation folding frames are installed on the storage box hatch cover, an input and output interface is arranged at the upper right corner of the operation panel, an indicator light group is arranged on the surface of the operation panel relative to the bottom of the input and output interface, a corresponding toggle-type two-speed switch is arranged on the surface of the operation panel relative to the bottom of the indicator light group, a resistance measurement knob-type selection switch is arranged at the lower right corner of the operation panel, a measurement control switch and a pull-out two-speed power control switch are arranged in sequence on the surface of the operation panel relative to the left side of the resistance measurement knob-type selection switch, a battery compartment is also arranged on the top of the operation panel, and two digital multimeter interfaces are arranged on the surface of the operation panel relative to the bottom of the battery compartment.

[0007] Preferably, the indicator light group includes a green indicator light, a red indicator light and a blue indicator light, and the number of the green indicator light, the red indicator light and the blue indicator light are nine each.

[0008] Preferably, a test connection cable, a digital multimeter connection line and an indicator sheet are placed in the storage box.

[0009] Preferably, a universal square battery is installed in the battery compartment.

[0010] Preferably, an integrated circuit board is also installed on the bottom surface of the operation panel.

[0011] Preferably, a Z-shaped bracket 1 is fixed at each of the four corners of the bottom of the mounting frame, and the bottom end of the Z-shaped bracket 1 is fixed to the inner wall of the box. A Z-shaped bracket 2 is also fixed to the bottom of the mounting frame, and the Z-shaped bracket 2 is located between the storage box and the Z-shaped bracket 1, and the bottom end of the Z-shaped bracket 2 is fixed to the inner wall of the box.

[0012] Preferably, one side of the box body is connected to a box cover via a hinge.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the test device can test the automatic throttle switch package assembly of an aircraft, and the test device is small in size, easy to carry, safe and reliable, and easy to operate. It can test nine switches at the same time, and the test status is clear at a glance. The test device can simultaneously test whether the conversion between switches is synchronized, and can also be connected to an external digital multimeter to measure the contact resistance inside each switch, effectively improving the accuracy of aircraft maintenance personnel's fault judgment and the precise adjustment of component calibration, improving aircraft maintenance quality and attendance rate, and greatly reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A top view of the present invention;

[0015] Figure 2 A three-dimensional diagram of the operating panel and the mounting frame of the present invention;

[0016] Figure 3 A top view of the installation frame of the present invention;

[0017] Figure 4 A three-dimensional diagram of a Z-shaped bracket 1 of the present invention;

[0018] Figure 5 It is a three-dimensional diagram of the second Z-shaped bracket of the present invention;

[0019] Figure 6 A circuit diagram of the present invention;

[0020] In the figure: 1. Box body; 2. Box cover; 3. Operation panel; 4. Indicator light group; 41. Green indicator light; 42. Red indicator light; 43. Blue indicator light; 5. Input and output interface; 6. Toggle two-speed switch; 7. Resistance measurement knob selection switch; 8. Measurement control switch; 9. Pull-out two-speed power control switch; 10. Battery compartment; 11. Digital multimeter interface; 12. Storage box cover; 13. Test installation folding frame; 14. Installation frame; 15. Z-shaped bracket one; 16. Z-shaped bracket two; 17. Storage box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example

[0023] See also Figures 1 to 6, is an embodiment of the present invention, which provides a technical solution: a test device for an aircraft automatic throttle switch package assembly, comprising a box 1 and a mounting frame 14 installed on the inner side of the box 1, the box 1 is made of plastic material, has IP67 waterproof grade, pressure resistance and shock resistance, outer dimensions are 330*250*133mm, inner dimensions are 330*200*125(35+90)mm; weight is 1.3kg, box wall thickness is 3.5mm, an operation panel 3 is installed on the top of the mounting frame 14 using 5 M3 plum screws, the operation panel 3 is made of 2mm aviation aluminum plate, and the dimensions are 300mm long, 200mm wide and 2mm thick A storage box 17 is fixed to the lower left of the mounting frame 14 by four M4 screws. A storage box hatch 12 corresponding to the storage box 17 is hinged on the top of the operation panel 3. Two test mounting folding frames 13 are installed on the storage box hatch 12, which are used for fault diagnosis and testing of components removed from the aircraft. They can be folded and stored when not in use. The purpose of this design is to help maintenance personnel accurately determine the fault points of components when the components are removed for repair, so that the repair factory can have stronger pertinence when repairing the components, which can effectively reduce the maintenance cost and repair claim issues; an input and output interface 5 is set at the upper right corner of the operation panel 3, and the interface can be connected to the automatic throttle switch package assembly through a test cable. Two electrical plugs, when the microswitch inside the automatic throttle switch package assembly is switched, the electrical signal is transmitted to the indicator light of the test device. The input and output interface 5 uses a rectangular aviation quick-connect plug with 31 cores on the market, which has the advantages of convenient and fast plugging, reliable contact and low contact resistance. The surface of the operation panel 3 is provided with an indicator light group 4 relative to the bottom of the input and output interface 5, and the surface of the operation panel 3 is provided with a corresponding toggle-type two-speed switch 6 relative to the bottom of the indicator light group 4. The indicator light group 4 includes a green indicator light 41, a red indicator light 42 and a blue indicator light 43, and the number of the green indicator light 41, the red indicator light 42 and the blue indicator light 43 are all nine, and the green The indicator light 41 is on, indicating that the control switch is turned on. The red and blue indicator lights indicate the internal conversion state of the tested microswitch. A resistance measurement knob selection switch 7 is provided at the lower right corner of the operation panel 3, which can be used to measure the contact resistance of the internal contacts of the microswitch. A 10-speed silver contact knob switch is selected, which has the advantages of small contact resistance and accurate gear position. The rotary switch controls the circuit of the microswitch resistance measurement to be measured. The switch has 10 gears, 9 gears for effective measurement, and the off gear is to disconnect the measurement circuit. The surface of the operation panel 3 is provided with a measurement control switch 8 and a pull-out type (anti-touch) two-speed power control switch 9 on the left side of the resistance measurement knob selection switch 7.

[0024] A battery compartment 10 is further disposed on the operation panel 3 , and two digital multimeter interfaces 11 are disposed on the surface of the operation panel 3 opposite to the bottom of the battery compartment 10 .

[0025] Among them, a test connection cable, a digital multimeter connection line (1 red / 1 black) and an indicator sheet are placed in the storage box 17. The test connection cable is composed of 31 0.15 square 30-core copper-galvanized wires. The test device normally uses only 27 wires. 4 wires are reserved in the cable as spare wires for repairing cable failures. One end of the cable uses an aviation rectangular fast plug to connect the test device, and the other end uses two aviation sockets of the aircraft manufacturer to connect to the two plugs of the left or right automatic throttle switch package assembly to be tested, so that the test device is connected to the circuit of the tested object. Since an aircraft is equipped with left and right There are 1 auto throttle switch package assembly with different part numbers on the left and right (2 in total), and each auto throttle switch package assembly has two plugs and an error-proof design, so 4 aviation sockets and two test cables are needed; in order to facilitate the operation and connection of maintenance personnel, the two aviation sockets at one end of the test connection cable are redesigned, and a set of anti-wrong insertion slots are added to each aviation socket, so that one test connection cable can test the left and right auto throttle switch package assemblies on an aircraft; the storage box hatch 12 is connected to the operation panel 3 using a parent-child hinge, and two magnetic blocks are used to keep the storage box hatch 12 in the closed position.

[0026] Among them, the test device comes with a 9V DC power supply to avoid the complicated operations caused by external power supplies and other equipment. A universal 9V / CD square battery is installed in the battery compartment 10, which can provide up to 8 hours of working time for the test device; the universal 9V / CD square battery is cheap to buy in the market and is also convenient for daily replacement.

[0027] The bottom surface of the operation panel 3 is also equipped with an integrated circuit board. In order to enable the test device to achieve the required test function, circuit design is the core of the device. Figure 6, the circuit uses 54 Schottky diodes as electronic components for circuit control, which have good high conduction, low resistance and low power consumption characteristics in low voltage circuits, reduced forward conduction voltage, extremely short reverse recovery time and low reverse leakage rate. A transient suppression diode (TVS) is used in the circuit to protect the electronic components and indicator lights in the circuit from damage by surges and pulses; 9 groups of test circuits are designed in the integrated circuit (which can be expanded to more than 10-24 groups according to different uses and functions), and each group of circuits uses 6 Schottky diodes for circuit isolation and switch control, so that each group can work alone or simultaneously without being affected by other groups of circuits; the integrated circuit is designed with a resistance measurement function, using a pull-out (anti-touch) two-speed power control switch 9 and a resistance measurement knob selection switch 7 to control the resistance measurement circuit; if you need to test the automatic throttle switch package assembly To measure the contact resistance of the switch, you only need to plug the multimeter connecting wire in the storage box 17 into the digital multimeter interface 11 on the operation panel 3, so that you can measure the two contact resistances of each micro switch in the automatic throttle switch package, and the measurement can be carried out conveniently and quickly; a test circuit and a test button for all indicator lights are designed in the circuit to self-check whether all indicator lights are working normally; an anti-misoperation circuit is also designed in the internal circuit of the test device. When measuring resistance, the power switch must be turned off (OFF position) before the digital multimeter can display the resistance value, so as to prevent the multimeter and the electronic components of the device from being damaged by misoperation when measuring resistance and causing power to be supplied to the test circuit; the core of this test device is the design of the internal circuit, and the design and control relationship of the circuit can be expanded into multiple groups, for example: it can be expanded to 24 groups and above on the basis of 9 groups, and the circuit design principle is basically the same.

[0028] Among them, a Z-shaped bracket 15 is riveted and fixed at the four corners of the bottom of the installation frame 14, and the bottom end of the Z-shaped bracket 15 is riveted and fixed to the inner wall of the box 1. A Z-shaped bracket 2 16 is also riveted and fixed to the bottom of the installation frame 14. The bracket is mainly used to bear the tension and pressure of the multimeter interface 11 when plugging and unplugging the connecting wire. The Z-shaped bracket 2 16 is located between the storage box 17 and the Z-shaped bracket 15. The bottom end of the Z-shaped bracket 2 16 is riveted and fixed to the inner wall of the box 1. The Z-shaped bracket 15 and the Z-shaped bracket 2 16 can form the installation frame 14 and the box 1 into a whole. The Z-shaped bracket 15 and the Z-shaped bracket 2 16 are both made of 2mm thick aviation aluminum plate, and the installation frame is 300mm long and 200mm wide (about the size of A4 paper).

[0029] One side of the box body 1 is connected with a box cover 2 via a hinge.

[0030] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for an aircraft automatic throttle switch package assembly, characterized in that: The invention comprises a box body (1) and a mounting frame (14) mounted inside the box body (1), an operation panel (3) being mounted on the top of the mounting frame (14), a storage box (17) being arranged at the lower left of the mounting frame (14), a storage box hatch cover (12) corresponding to the storage box (17) being hingedly connected to the top of the operation panel (3), two test mounting folding frames (13) being mounted on the storage box hatch cover (12), an input / output interface (5) being arranged at the upper right corner of the operation panel (3), and an indicator light group (13) being arranged on the surface of the operation panel (3) opposite to the bottom of the input / output interface (5). 4), a corresponding toggle-type two-speed switch (6) is arranged on the surface of the operation panel (3) relative to the bottom of the indicator light group (4), a resistance measurement knob-type selection switch (7) is arranged at the lower right corner of the operation panel (3), a measurement control switch (8) and a pull-out two-speed power control switch (9) are arranged on the surface of the operation panel (3) relative to the left side of the resistance measurement knob-type selection switch (7), a battery compartment (10) is also arranged on the top of the operation panel (3), and two digital multimeter interfaces (11) are arranged on the surface of the operation panel (3) relative to the bottom of the battery compartment (10).

2. A test device for an aircraft automatic throttle switch package assembly according to claim 1, characterized in that: The indicator light group (4) comprises a green indicator light (41), a red indicator light (42) and a blue indicator light (43), and the number of the green indicator light (41), the red indicator light (42) and the blue indicator light (43) are all nine.

3. A test device for an aircraft automatic throttle switch package assembly according to claim 1, characterized in that: A test connection cable, a digital multimeter connection line and an indicator sheet are placed in the storage box (17).

4. A test device for an aircraft automatic throttle switch package assembly according to claim 1, characterized in that: A universal square battery is installed in the battery compartment (10).

5. A test device for an aircraft automatic throttle switch package assembly according to claim 1, characterized in that: An integrated circuit board is also installed on the bottom surface of the operation panel (3).

6. A test device for an aircraft automatic throttle switch package assembly according to claim 1, characterized in that: A Z-shaped bracket (15) is fixed at each of the four corners at the bottom of the installation frame (14), and the bottom end of the Z-shaped bracket (15) is fixed to the inner wall of the box body (1).

7. A test device for an aircraft automatic throttle switch package assembly according to claim 6, characterized in that: A second Z-shaped bracket (16) is also fixed to the bottom of the installation frame (14), and the second Z-shaped bracket (16) is located between the storage box (17) and the first Z-shaped bracket (15), and the bottom end of the second Z-shaped bracket (16) is fixed to the inner wall of the box body (1).

8. A test device for an aircraft automatic throttle switch package assembly according to claim 1, characterized in that: One side of the box body (1) is connected to a box cover (2) via a hinge.

Images