Aviation backup instrument system tester

Abstract

The utility model relates to a tester for an aviation backup instrument system, which belongs to the technical field of performance testing of the aviation backup instrument system and comprises a field pressure binding device used for acquiring field pressure signals; the height and speed measuring module is in communication connection with the field pressure binding device and is used for calculating and outputting height and speed signals after receiving the field pressure signal and static pressure and dynamic pressure signals from the airplane; the heading attitude measurement module is used for measuring the heading attitude of the airplane and sending a heading attitude signal; the display is in communication connection with the height and speed measurement module and the heading attitude measurement module and is used for receiving the height and speed signals and the heading attitude signals and displaying the heading attitude, height and speed of the aircraft; and the signal monitoring module is in communication connection with the display, the field pressure binding device, the height and speed measurement module and the heading attitude measurement module, and is used for monitoring whether the signal transceiving of the aviation backup instrument system is normal or not. According to the utility model, the technical problem of inaccurate flight indication caused by incomplete function display and incapability of signal cross-linking in the prior art is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of performance testing technology for aviation backup instrument systems, and in particular to an aviation backup instrument system tester. Background Technology

[0002] The backup instrument system is an integrated display instrument that consists of a display component, an attitude measurement component, an altitude and speed measurement component, a field pressure stapling device, etc., forming an independent backup instrument system. The product receives attitude and heading signals from its own attitude measurement component, static pressure and total pressure signals from the aircraft, and field pressure stapling signals provided by the field pressure stapling device. It calculates parameters such as the aircraft's attitude, heading, altitude, and indicated airspeed, and provides the navigator with real-time display of backup flight parameter information such as aircraft heading, attitude (including pitch and roll angles), altitude, speed, field pressure stapling, attitude alarms, and heading alarms on its color LCD screen.

[0003] As a crucial component of the cockpit integration and display system, the backup instrument system provides indications for aircraft heading, roll, pitch, atmospheric parameters, and necessary warning signals, making it an indispensable part of the aircraft instrument system. Incomplete display functions or signal communication failures can lead to inaccurate flight indications; therefore, a comprehensive inspection of the backup instrument system is necessary during testing and maintenance. Utility Model Content

[0004] In view of this, it is necessary to provide an aviation backup instrument system tester to solve the technical problem of inaccurate flight instructions caused by incomplete function display and inability to cross-link signals in the existing technology.

[0005] To address the aforementioned issues, this invention provides an aviation backup instrument system tester, comprising: a field pressure register for acquiring field pressure signals;

[0006] The altitude and speed measurement module communicates with the field pressure binding device and is used to calculate and output altitude and speed signals after receiving field pressure signals and static and dynamic pressure signals from the aircraft.

[0007] The attitude measurement module is used to measure the aircraft's attitude and send attitude signals.

[0008] The display is communicatively connected to the altitude and speed measurement module and the attitude measurement module, and is used to receive altitude and speed signals and attitude signals and display the aircraft's attitude, altitude and speed;

[0009] The signal monitoring module communicates with the display, field pressure binding device, altitude and speed measurement module, and attitude measurement module to monitor whether the signal transmission and reception of the aviation backup instrument system are normal.

[0010] In one possible implementation, the attitude measurement module includes a set of signal transmitters for sending a set of identical attitude signals.

[0011] In one possible implementation, the height and speed measurement module includes: a first height and speed measurement module and a second height and speed measurement module. The second height and speed measurement module is communicatively connected to the field pressure binding device for receiving the field pressure signal. The second height and speed measurement module is also electrically connected to the field pressure binding device for providing a 10VDC reference voltage to the field pressure binding device. The first height and speed measurement module includes a set of signal transmitting terminals, and the set of signal transmitting terminals is communicatively connected to a display for sending a set of identical height and speed signals.

[0012] In one possible implementation, the tester further includes:

[0013] A power plug, which communicates with an external power source to provide power to the test instrument;

[0014] The 28VDC control switch has its input end connected to the power plug and its output end connected to the display, altitude and speed measurement module and attitude measurement module. It is used to supply or disconnect 28V DC power to the test instrument.

[0015] The 5VDC control switch has its input end connected to the power plug and its output end connected to the display, field voltage binder, and signal monitoring module via a 28V / 5V DC-DC converter. It is used to supply or disconnect 5V DC power to the tester.

[0016] In one possible implementation, the tester further includes:

[0017] The 28VDC voltage and current measurement module and the 5VDC voltage and current measurement module are used to measure the operating voltage and operating current of the tester.

[0018] The output terminal of the 28VDC control switch is communicatively connected to the display, altitude and speed measurement module, and attitude measurement module through the 28VDC voltage and current measurement module.

[0019] The output of the 5VDC control switch is connected to the display, field voltage binder, and signal monitoring module in sequence through a 28V / 5V DC-DC converter and a 5VDC voltage and current measurement module.

[0020] In one possible implementation, the tester further includes: a 28V illumination indicator and a 5V illumination indicator, used to indicate whether the tester is currently supplying 28V power and / or 5V power to the product under test;

[0021] The 28VDC voltage and current measurement module includes: a 28VDC voltmeter and a 28VDC ammeter;

[0022] The 5VDC voltage and current testing module includes: a 5VDC voltmeter and a 5VDC ammeter;

[0023] The 28VDC control switch is connected in parallel with the 28VDC voltmeter, in series with the 28VDC ammeter, and in parallel with the 28V lighting indicator.

[0024] The output terminal of the 28V / 5V DC-DC converter is connected in parallel with the 5VDC voltmeter, in series with the 5VDC ammeter, and in parallel with the 5V lighting indicator.

[0025] In one possible implementation, the signal monitoring module includes:

[0026] The display signal receiving module is connected in communication with the display and is used to monitor whether the display is receiving the altitude, speed and attitude signals normally.

[0027] The field pressure signal test module is communicatively connected to the field pressure binding device and the attitude measurement module, and is used to monitor whether the transmission and reception of the field pressure signal are normal, and whether the field pressure binding device receives the 10VDC reference voltage normally.

[0028] The attitude signal transmission module is communicatively connected to the attitude measurement module and is used to monitor whether the attitude measurement module is transmitting attitude signals normally.

[0029] The altitude and speed signal transmission module is communicatively connected to the altitude and speed measurement module and is used to monitor whether the altitude and speed measurement module is transmitting the altitude and speed signals normally.

[0030] The voltage monitoring module is communicatively connected to the 28VDC control switch and the 5VDC control switch, and is used to monitor the 28V DC voltage and / or the 5V DC voltage.

[0031] In one possible implementation, the display signal receiving module includes:

[0032] A set of attitude signal monitoring terminals is used to monitor whether the display is receiving the attitude signal normally;

[0033] A set of height and speed signal monitoring terminals is used to monitor whether the display is receiving the height and speed signals normally;

[0034] The field pressure signal testing module includes:

[0035] The field pressure signal transmission monitoring terminal is communicatively connected to the field pressure binding device and is used to monitor whether the transmission of the field pressure signal is normal.

[0036] The field pressure signal receiving and monitoring terminal is communicatively connected to the second height and speed measurement module and is used to monitor whether the field pressure signal is received normally.

[0037] The 10VDC monitoring terminal is connected to the field pressure stapler and is used to monitor whether the field pressure stapler is receiving the 10VDC reference voltage normally.

[0038] The attitude signal transmission module includes: a set of attitude signal transmission and monitoring terminals;

[0039] The altitude and speed signal transmission module includes a set of altitude and speed signal transmission monitoring terminals, which are communicatively connected to the first altitude and speed measurement module.

[0040] In one possible implementation, the voltage monitoring module includes: a 28VDC monitoring terminal, a 5VDC monitoring terminal, and a grounding monitoring terminal;

[0041] The 28VDC control switch and the 5VDC control switch are both four-pin two-position switches, and both the input and output terminals of the 28VDC control switch and the 5VDC control switch include two pins.

[0042] One pin of the 28VDC control switch input terminal is electrically connected to the fuse and the 28VDC monitoring terminal, respectively, and the other pin is electrically connected to the power plug and the grounding monitoring terminal, respectively.

[0043] The output of the 28VDC control switch is connected in parallel with the 28VDC lighting indicator, the 28VDC voltmeter, the display, the second altitude speed measurement module, and the attitude measurement module, respectively, and any one of the pins is connected in series with the 28VDC ammeter.

[0044] One pin of the 5VDC control switch input terminal is electrically connected to the 28VDC monitoring terminal and the fuse, and the other pin is electrically connected to the power plug and the ground monitoring terminal.

[0045] The output terminal of the 5VDC control switch is connected in parallel with the 28VDC to 5VDC power supply module, and the 28VDC to 5VDC power supply module is electrically connected to the 5VDC monitoring terminal.

[0046] In one possible implementation, the tester further includes: a housing;

[0047] The 28VDC control switch, 5VDC control switch, 28V lighting indicator, 5V lighting indicator, 28VDC voltage and current measurement module, and 5VDC voltage and current measurement module are all integrated on the same side of the enclosure and located on the opposite side of the power plug.

[0048] The power plug is located on the opposite side of the said side.

[0049] The beneficial effects of this utility model are as follows: This utility model provides an aviation backup instrument system tester, including a field pressure binding device, an altitude and speed measurement module, an attitude measurement module, a display, and a signal monitoring module. The display is communicatively connected to the altitude and speed measurement module and the attitude measurement module, and the signal monitoring module is communicatively connected to the display, the field pressure binding device, the altitude and speed measurement module, and the attitude measurement module. While monitoring the parameters acquired by each module within the instrument system in real time through the display, the signal monitoring module can also determine whether the signal transmission and reception of each module within the instrument system are normal. This quickly and comprehensively achieves monitoring of the backup instrument system, enabling relevant operators to promptly detect whether the instrument system has abnormal function display or whether internal modules have malfunctioned, leading to a decrease in indication accuracy. This allows for precise troubleshooting, effectively solving the technical problem of inaccurate flight indications caused by incomplete function display and inability to cross-link signals in existing technologies. Attached Figure Description

[0050] Figure 1 A schematic diagram of the structure of an embodiment of the aviation backup instrument system tester provided by this utility model;

[0051] Figure 2 A schematic diagram of the structure of the front panel of the test chamber of the aviation backup instrument system provided by this utility model;

[0052] Figure 3 A schematic diagram of the structure of the rear panel of the test chamber of the aviation backup instrument system provided by this utility model. Detailed Implementation

[0053] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0055] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0056] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0057] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0058] like Figure 1 As shown, a specific embodiment of this utility model discloses an aviation backup instrument system tester 10, comprising:

[0059] Field pressure binding device 110 is used to acquire field pressure signals;

[0060] The altitude and speed measurement module 120 is communicatively connected to the field pressure binding device 110 and is used to calculate and output altitude and speed signals after receiving field pressure signals and static and dynamic pressure signals from the aircraft.

[0061] The attitude measurement module 130 is used to measure the attitude of the aircraft and send attitude signals.

[0062] The display 140 is communicatively connected to the altitude and speed measurement module 120 and the attitude measurement module 130, and is used to receive altitude and speed signals and attitude signals and display the aircraft's attitude, altitude and speed.

[0063] The signal monitoring module 150 is communicatively connected to the field pressure binding device 110, the altitude and speed measurement module 120, the attitude measurement module 130, and the display 140, and is used to monitor whether the signal transmission and reception of the aviation backup instrument system are normal.

[0064] Compared with the prior art, the present invention provides an aviation backup instrument system tester, including a field pressure binding device, an altitude and speed measurement module, an attitude measurement module, a display, and a signal monitoring module. The display is communicatively connected to the altitude and speed measurement module and the attitude measurement module, and the signal monitoring module is communicatively connected to the display, the field pressure binding device, the altitude and speed measurement module, and the attitude measurement module. While monitoring the parameters acquired by each module inside the instrument system in real time through the display, the signal monitoring module can also determine whether the signal transmission and reception of each module inside the instrument system is normal. This enables rapid and comprehensive monitoring of the backup instrument system, allowing relevant operators to promptly detect whether the instrument system has abnormal display functions or whether the internal modules of the system have malfunctioned, resulting in a decrease in indication accuracy. This allows for precise troubleshooting and effectively solves the technical problem of inaccurate flight indication in the prior art.

[0065] In one possible implementation, the attitude measurement module 130 includes a set of signal transmitters for sending a set of identical attitude signals A and B.

[0066] In one possible implementation, the altitude and speed measurement module 120 includes a first altitude and speed measurement module and a second altitude and speed measurement module. The second altitude and speed measurement module is communicatively connected to the field pressure binding device 110 for receiving field pressure signals. The second altitude and speed measurement module is also electrically connected to the field pressure binding device 110 for providing a 10VDC reference voltage to the field pressure binding device 110. The first altitude and speed measurement module includes a set of signal transmitters, and the set of signal transmitters is communicatively connected to the display 140 for sending a set of identical altitude and speed signals A and B.

[0067] In one possible implementation, the tester 10 further includes:

[0068] The power plug 160 is connected to an external power source for supplying power to the tester 10.

[0069] The 28VDC control switch 170 has its input end connected to the power plug 160 and its output end connected to the display 140, the altitude and speed measurement module 120 and the attitude measurement module 130. It is used to connect or disconnect the 28V DC power supply to the test instrument 10.

[0070] The 5VDC control switch 180 has its input end connected to the power plug and its output end connected to the display, field voltage binder, and signal monitoring module via a 28V / 5V DC-DC converter. It is used to supply or disconnect 5V DC power to the tester.

[0071] In one possible implementation, the tester 10 further includes:

[0072] The 28VDC voltage and current measurement module 190 and the 5VDC voltage and current measurement module 200 are used to measure the operating voltage and operating current of the tester 10.

[0073] The output terminal of the 28VDC control switch 170 is communicatively connected to the display 140, the altitude and speed measurement module 120, and the attitude measurement module 130 through the 28VDC voltage and current measurement module 170.

[0074] The output of the 5VDC control switch 180 is connected to the display 140, the field voltage binder 110 and the signal monitoring module 120 in sequence through the 28VDC to 5VDC converter 200 and the 5VDC voltage and current measurement module 200.

[0075] In one possible implementation, the tester 10 further includes a 28V illumination indicator 220 and a 5V illumination indicator 230, for indicating whether the tester 10 is currently supplying 28V power and / or 5V power to the product under test;

[0076] The 28VDC voltage and current measurement module 190 includes: a 28VDC voltmeter 181 and a 28VDC ammeter 182;

[0077] The 5VDC voltage and current test module 190 includes: a 5VDC voltmeter 191 and a 5VDC ammeter 192;

[0078] Among them, the 28VDC control switch is connected in parallel with the 28VDC voltmeter 181, in series with the 28VDC ammeter 182, and in parallel with the 28V lighting indicator 220;

[0079] The output of the 28V / 5V DC-DC converter is connected in parallel with a 5VDC voltmeter 191, in series with a 5VDC ammeter 192, and in parallel with a 5V indicator light 230.

[0080] In one possible implementation, the signal monitoring module 150 includes:

[0081] The display signal receiving module 151 is communicatively connected to the display 140 and is used to monitor whether the display 140 is receiving altitude and speed signals A and B, as well as attitude signals A and B, normally.

[0082] The field pressure signal test module is communicatively connected to the field pressure binding device 110 and the attitude measurement module 130. It is used to monitor whether the transmission and reception of the field pressure signal are normal, and whether the field pressure binding device 110 receives the 10VDC reference voltage normally.

[0083] Furthermore, the field voltage signal testing module includes:

[0084] The field voltage signal transmission monitoring terminal 152 is communicatively connected to the field voltage binder 110 and is used to monitor whether the transmission of the field voltage signal is normal.

[0085] The field pressure signal receiving and monitoring terminal 153 is communicatively connected to the second height speed measurement module and is used to monitor whether the field pressure signal reception is normal.

[0086] The attitude signal transmitting module 154 is communicatively connected to the attitude measurement module 130 and is used to monitor whether the attitude measurement module 130 is transmitting attitude signals normally.

[0087] The altitude and speed signal transmission module 155 is communicatively connected to the altitude and speed measurement module 120 and is used to monitor whether the altitude and speed measurement module 120 is transmitting altitude and speed signals normally.

[0088] The voltage monitoring module is communicatively connected to the 28VDC control switch 150 and the 5VDC control switch 180, and is used to monitor the 28V DC voltage and / or the 5V DC voltage.

[0089] In one possible implementation, the voltage monitoring module includes: a 28VDC monitoring terminal 156, a 5VDC monitoring terminal 157, and a grounding monitoring terminal;

[0090] It should be noted that the 28VDC monitoring terminal is mainly used to monitor 28V DC voltage and can be connected in parallel to output voltage for external multimeter to measure voltage value. The same applies to the 5VDC monitoring terminal.

[0091] Among them, the 28VDC control switch 170 and the 5VDC control switch 180 are both four-pin two-position switches. The input and output terminals of the 28VDC control switch 170 and the 5VDC control switch 180 each include two pins.

[0092] One pin of the input terminal of the 28VDC control switch 170 is electrically connected to the fuse and the 28VDC monitoring terminal, and the other pin is electrically connected to the power plug 160 and the grounding monitoring terminal.

[0093] The output terminal of the 28VDC control switch 170 is connected in parallel with the 28VDC lighting indicator 210, the 28VDC voltmeter 181, the display 140, the second altitude speed measurement module, and the attitude measurement module 130, respectively, and any one of its pins is connected in series with the 28VDC ammeter 182.

[0094] One pin of the input terminal of the 5VDC control switch 180 is electrically connected to the 28VDC monitoring terminal 156 and the fuse, and the other pin is electrically connected to the power plug 160 and the ground monitoring terminal.

[0095] The output terminal of the 5VDC control switch 180 is connected in parallel with the 28VDC to 5VDC power module 210. One pin of the input terminal of the 5VDC control switch is electrically connected to the 28VDC monitoring terminal 156 and the fuse, respectively, and the other pin is electrically connected to the power plug and the ground monitoring terminal.

[0096] The output terminal of the 5VDC control switch 180 is connected in parallel with the 28VDC to 5VDC power supply module 210, and the 28VDC to 5VDC power supply module 210 is electrically connected to the 5VDC monitoring terminal 157.

[0097] Furthermore, when setting up two four-pin two-position switches, they can be configured to turn on power when the switch is turned up and turn off power when the switch is turned down.

[0098] In one possible implementation, the display signal receiving module 151 includes:

[0099] A set of attitude signal monitoring terminals is used to monitor whether the display 140 is receiving attitude signals A and B normally;

[0100] A set of altitude and speed signal monitoring terminals is used to monitor whether the display 140 is receiving altitude and speed signals A and B normally;

[0101] The 10VDC monitoring terminal is connected to the field pressure binding device 110 for monitoring whether the field pressure binding device 110 is receiving the 10VDC reference voltage normally.

[0102] The attitude signal transmission module 153 includes: a set of attitude signal transmission and monitoring terminals;

[0103] The altitude and speed signal transmission module 154 includes: a set of altitude and speed signal transmission monitoring terminals, which are communicatively connected to the first altitude and speed measurement module.

[0104] Therefore, it can be understood that the purpose of this utility model is to provide an aviation backup instrument system tester to perform display function testing, lighting inspection, display component inspection, control button inspection, attitude indication inspection, altitude and airspeed indication inspection, fault mode detection, field pressure binding inspection, attitude measurement component parameter testing, heading parameter inspection, and altitude and speed parameter inspection, so as to ensure that the aviation backup instrument system works in accordance with the usage requirements.

[0105] In one possible implementation, the tester 10 further includes: a housing 240;

[0106] The 28VDC control switch 170, 5VDC control switch 180, 28V lighting indicator 220, 5V lighting indicator 230, 28VDC voltage and current measurement module 190 and 5VDC voltage and current measurement module 200 are all integrated on the same side of the enclosure 240 and located on the opposite side of the power plug 160.

[0107] Specifically, such as Figure 2 As shown, the 28VDC control switch 170, 5VDC control switch 180, 28V lighting indicator 220, 5V lighting indicator 230, 28VDC voltage and current measurement module 190, and 5VDC voltage and current measurement module 200 are integrated on one side of the tester's front panel. Correspondingly, as... Figure 3 As shown, the side where the power plug 160 is located is the rear panel of the tester.

[0108] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An aviation backup instrument system tester, characterized in that, include: Field pressure binding device, used to acquire field pressure signals; The altitude and speed measurement module communicates with the field pressure binding device and is used to calculate and output altitude and speed signals after receiving field pressure signals and static and dynamic pressure signals from the aircraft. The attitude measurement module is used to measure the aircraft's attitude and send attitude signals. The display is communicatively connected to the altitude and speed measurement module and the attitude measurement module, and is used to receive altitude and speed signals and attitude signals and display the aircraft's attitude, altitude and speed; The signal monitoring module communicates with the display, field pressure binding device, altitude and speed measurement module, and attitude measurement module to monitor whether the signal transmission and reception of the aviation backup instrument system are normal.

2. The aviation backup instrument system tester according to claim 1, characterized in that, The attitude measurement module includes a set of signal transmitters for sending a set of identical attitude signals.

3. The aviation backup instrument system tester according to claim 1, characterized in that, The height and speed measurement module includes a first height and speed measurement module and a second height and speed measurement module. The second height and speed measurement module is communicatively connected to the field pressure binding device and is used to receive the field pressure signal. The second height and speed measurement module is also electrically connected to the field pressure binding device and is used to provide a 10VDC reference voltage to the field pressure binding device. The first height and speed measurement module includes a set of signal transmitting terminals, and the signal transmitting terminals are communicatively connected to the display and are used to send the height and speed signals.

4. The aviation backup instrument system tester according to claim 3, characterized in that, The testing instrument also includes: A power plug, which communicates with an external power source to provide power to the test instrument; The 28VDC control switch has its input end connected to the power plug and its output end connected to the display, altitude and speed measurement module and attitude measurement module. It is used to supply or disconnect 28V DC power to the test instrument. The 5VDC control switch has its input end connected to the power plug and its output end connected to the display, field voltage binder, and signal monitoring module via a 28V / 5V DC-DC converter. It is used to supply or disconnect 5V DC power to the tester.

5. The aviation backup instrument system tester according to claim 4, characterized in that, The testing instrument also includes: The 28VDC voltage and current measurement module and the 5VDC voltage and current measurement module are used to measure the operating voltage and operating current of the tester. The output terminal of the 28VDC control switch is communicatively connected to the display, altitude and speed measurement module, and attitude measurement module through the 28VDC voltage and current measurement module. The output of the 5VDC control switch is connected to the display, field voltage binder, and signal monitoring module in sequence through a 28V / 5V DC-DC converter and a 5VDC voltage and current measurement module.

6. The aviation backup instrument system tester according to claim 5, characterized in that, The tester also includes: a 28V lighting indicator and a 5V lighting indicator, used to indicate whether the tester is currently supplying 28V power and / or 5V power to the product under test; The 28VDC voltage and current measurement module includes: a 28VDC voltmeter and a 28VDC ammeter; The 5VDC voltage and current measurement module includes: a 5VDC voltmeter and a 5VDC ammeter; The 28VDC control switch is connected in parallel with the 28VDC voltmeter, in series with the 28VDC ammeter, and in parallel with the 28V lighting indicator. The output terminal of the 28V / 5V DC-DC converter is connected in parallel with the 5VDC voltmeter, in series with the 5VDC ammeter, and in parallel with the 5V lighting indicator.

7. The aviation backup instrument system tester according to claim 5, characterized in that, The signal monitoring module includes: The display signal receiving module is connected in communication with the display and is used to monitor whether the display is receiving the altitude, speed and attitude signals normally. The field pressure signal test module is communicatively connected to the field pressure binding device and the attitude measurement module, and is used to monitor whether the transmission and reception of the field pressure signal are normal, and whether the field pressure binding device receives the 10VDC reference voltage normally. The attitude signal transmission module is communicatively connected to the attitude measurement module and is used to monitor whether the attitude measurement module is transmitting attitude signals normally. The altitude and speed signal transmission module is communicatively connected to the altitude and speed measurement module and is used to monitor whether the altitude and speed measurement module is transmitting the altitude and speed signals normally. The voltage monitoring module is communicatively connected to the 28VDC control switch and the 5VDC control switch, and is used to monitor the 28V DC voltage and / or the 5V DC voltage.

8. The aviation backup instrument system tester according to claim 3 or 7, characterized in that, The display signal receiving module includes: A set of attitude signal monitoring terminals is used to monitor whether the display is receiving the attitude signal normally; A set of height and speed signal monitoring terminals is used to monitor whether the display is receiving the height and speed signals normally; The field pressure signal testing module includes: The field pressure signal transmission monitoring terminal is communicatively connected to the field pressure binding device and is used to monitor whether the transmission of the field pressure signal is normal. The field pressure signal receiving and monitoring terminal is communicatively connected to the second height and speed measurement module and is used to monitor whether the field pressure signal is received normally. The 10VDC monitoring terminal is connected to the field pressure stapler and is used to monitor whether the field pressure stapler is receiving the 10VDC reference voltage normally. The attitude signal transmission module includes: a set of attitude signal transmission and monitoring terminals; The altitude and speed signal transmission module includes a set of altitude and speed signal transmission monitoring terminals, which are communicatively connected to the first altitude and speed measurement module.

9. The aviation backup instrument system tester according to claim 7, characterized in that, The voltage monitoring module includes: a 28VDC monitoring terminal, a 5VDC monitoring terminal, and a grounding monitoring terminal; The 28VDC control switch and the 5VDC control switch are both four-pin two-position switches, and both the input and output terminals of the 28VDC control switch and the 5VDC control switch include two pins. One pin of the 28VDC control switch input terminal is electrically connected to the fuse and the 28VDC monitoring terminal, respectively, and the other pin is electrically connected to the power plug and the grounding monitoring terminal, respectively. The output of the 28VDC control switch is connected in parallel with the 28VDC lighting indicator, the 28VDC voltmeter, the display, the second altitude speed measurement module, and the attitude measurement module, respectively, and any one of the pins is connected in series with the 28VDC ammeter. One pin of the 5VDC control switch input terminal is electrically connected to the 28VDC monitoring terminal and the fuse, and the other pin is electrically connected to the power plug and the ground monitoring terminal. The output terminal of the 5VDC control switch is connected in parallel with the 28VDC to 5VDC power supply module, and the 28VDC to 5VDC power supply module is electrically connected to the 5VDC monitoring terminal.

10. The aviation backup instrument system tester according to claim 4 or 6, characterized in that, The testing instrument also includes: a housing; The 28VDC control switch, 5VDC control switch, 28V lighting indicator, 5V lighting indicator, 28VDC voltage and current measurement module, and 5VDC voltage and current measurement module are all integrated on the same side of the enclosure and located on the opposite side of the power plug.

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