Airborne 1394 daughter card detection device

Abstract

An airborne 1394 daughter card detection device belongs to the technical field of 1394 communication detection, and comprises a detection device and a test box body which are connected with each other, the detection device comprises an input device, a display device, a power supply module, a main control module circuit board, a 1394 communication module circuit board, an AD acquisition module circuit board and a discrete magnitude module circuit board; the main control module circuit board is connected with the airborne 1394 daughter card 45 to be tested through the 1394 communication module circuit board; and the main control module circuit board is connected with the AD acquisition module circuit board. The airborne 1394 daughter card testing system can specifically test related functions such as data transmission rate, configuration information and communication state of the airborne 1394 daughter card, can monitor the state of the airborne 1394 daughter card in real time and display the state on a screen, and is high in testing efficiency and accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of 1394 communication detection, and in particular relates to an airborne 1394 daughter card detection device. Background Art

[0002] In the onboard equipment of the aircraft system, an onboard 1394 daughter card is usually used to complete the information transmission and interaction between devices and between devices and aircraft. In order to ensure the accuracy of information transmission between the two, different specifications of onboard 1394 daughter cards are used in different application scenarios. For example, the ground maintenance control panel on the aircraft uses a dedicated onboard 1394 daughter card to complete the information interaction with the aircraft. Since the external environment on the aircraft is very harsh, the onboard 1394 daughter cards used in this external environment have strict requirements on their product functions, transmission reliability, transmission rate, real-time interactivity, stability and other functional performance.

[0003] However, the existing dedicated testing equipment for airborne 1394 daughter cards cannot accurately monitor the relevant functional performance and test the comprehensive parameters. The parameters and functions of the airborne 1394 daughter cards can only be tested one by one through different devices, resulting in an inability to conduct systematic and comprehensive testing. In addition, the current dedicated testing equipment for airborne 1394 daughter cards is usually used in indoor environments such as laboratories, such as airport ground support, and outdoor use testing. The maintenance performance is poor when used in outdoor environments such as outdoor environments. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an airborne 1394 daughter card detection device, which can specifically test the airborne 1394 daughter card including data transmission rate, configuration information, communication status and other related functions, and can also monitor the status of the airborne 1394 daughter card in real time and display it on the screen, with high testing efficiency and high accuracy.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include: An airborne 1394 daughter card detection device comprises a detection device and a test box body connected to each other, wherein the detection device comprises an input device, a display device, a power module, a main control module circuit board, a 1394 communication module circuit board, an AD acquisition module circuit board, and a discrete quantity module circuit board; the main control module circuit board is connected to the input device and the display device; the main control module circuit board is connected to the airborne 1394 daughter card to be tested through the 1394 communication module circuit board, and the 1394 communication module circuit board is used to exchange information with the airborne 1394 daughter card to be tested and process signals related to 1394 bus communication; the power module supplies power to the main control module circuit board, the 1394 communication module circuit board, the AD acquisition module circuit board, and the discrete quantity module circuit board; the main control module circuit board is connected to the AD acquisition module circuit board, and the AD acquisition module circuit board is connected to the AD acquisition module circuit board. The block is used to collect voltage signals to obtain the power supply status of the detection equipment and the test box body; the main control module circuit board is connected to the discrete quantity module circuit board, and the discrete quantity module circuit board controls the discrete quantity output of the voltage / open circuit signal through relay control, and collects the information of the set voltage input signal; the main control module circuit board collects, summarizes, and converts the information of the 1394 communication module circuit board, the AD acquisition module circuit board, and the discrete quantity module circuit into a video signal and sends it to the display device; the test box body includes a test carrier board connected to the airborne 1394 daughter card to be tested, a power supply board, and a display unit. The power supply board is connected to the power module to supply power to the airborne 1394 daughter card to be tested, the test carrier board, and the display unit in the test box body. The test carrier board is used to collect the transmission content of the airborne 1394 daughter card to be tested, summarize, convert it, and send it to the display unit.

[0006] Furthermore, the 1394 communication module circuit board includes a 1394 single-node simulation card, and the 1394 single-node simulation card simulates the functions of CC, RN, and BM nodes in the 1394 bus.

[0007] Furthermore, the power module converts the input 220V AC power into DC28V / 5A and DC15V / 1A power, wherein the DC28V power is supplied to the main control module circuit board, the 1394 communication module circuit board, and the power board of the test box body, the AD acquisition module circuit board obtains the current power supply status of the detection equipment and the test box body by collecting the DC28V signal, and the DC15V is supplied to the discrete quantity module circuit board.

[0008] Furthermore, the test box body also includes a rear cover plate of the test box body and a shell. The power board and the test carrier are fixed on the rear cover plate of the test box body. The shell is provided with a control switch and an electrical connector for controlling the power on and off of the test box body. The display unit is fixed in the shell, and the rear cover plate of the test box body is assembled and connected to the shell.

[0009] Furthermore, the power board includes a power slow-start circuit, which sends the DC28V voltage input by the detection equipment to the TVS tube through the power slow-start circuit for anti-static protection and then to the overcurrent and overvoltage protection circuit. The overcurrent and overvoltage protection circuit includes a number of protection chips. When the input voltage is overvoltage or the subsequent circuit has an overcurrent, the overcurrent and overvoltage protection circuit cuts off the input voltage. The output current of the overcurrent and overvoltage protection circuit is converted into 28V and 5V direct current by the DC conversion circuit respectively. The 28V voltage is supplied to the display unit, and the 5V voltage is supplied to the 1394 onboard daughter card to be tested and the test carrier board for power supply.

[0010] Furthermore, the test carrier includes a CPU processing unit, which is interconnected with the FLASH storage and is used to store the fonts and pictures used for display; the CPU processing unit is connected to the DDR3 chip and is used to cache the information received by the CPU; the CPU processing unit is connected to the watchdog circuit and is used for the watchdog circuit, monitoring the 3V power supply in the 3V-5V microprocessor system, and powering on, resetting, and monitoring the CPU; the test carrier sends and receives data with the 1394 onboard daughter card to be tested through the PCIE interface; the test carrier is connected to the display unit through the RS422A transceiver and the LVDS transmitter.

[0011] Furthermore, the main control module circuit board, 1394 communication module circuit board, AD acquisition module circuit board, and discrete quantity module circuit board are assembled on a cage, and the cage and power supply module are assembled in a chassis. The rear of the chassis is provided with a chassis rear interface cover, and the chassis rear interface cover is provided with a power switch, an electrical connector, and a mains and aviation plug connector. The side of the chassis is provided with a serial port, a network port interface, and a USB port. The upper part of the chassis is provided with a keyboard, and the display device is hingedly connected to the chassis.

[0012] Furthermore, the chassis is provided with a fan and a handle for heat dissipation in the chassis.

[0013] Furthermore, the display device is a display screen, and the display screen is connected to a display screen heating device.

[0014] Furthermore, the display unit of the test box body is provided with a display device heating circuit.

[0015] The beneficial effects of the present invention are as follows: the onboard 1394 daughter card detection device of the present invention can specifically test and monitor the onboard 1394 daughter card including data transmission and real-time communication functions, and can monitor the system version, status information, whether the communication is normal, specific transmission data and other information of the current onboard 1394 daughter card in real time and display them on the screen. The test efficiency is high, the accuracy is high, and the use is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the airborne 1394 daughter card detection device of the present invention; Figure 2 It is an exploded diagram of the airborne 1394 daughter card detection device of the present invention; Figure 3 An exploded view of the test box of the present invention; Figure 4 This is a schematic diagram of the circuit board connection of the detection device of the present invention; Figure 5 This is a schematic diagram of the connection principle of the test box body of the present invention; Figure 6 Schematic diagram of the test process of the present invention.

[0017] In the figure: 1 is the chassis, 2 is the keyboard cover, 3 is the screen front panel, 4 is the screen rear panel, 5 is the screen locking structure, 6 is the chassis rear interface cover, 7 is the hinge cover, 8 is the fan frame, 9 is the left and right cage support frames, 10 is the 3U8 cage, 11 is the hinge, 12 is the screen foot pad, 13 is the chassis foot pad, 14 is the handle, 15 is the brightness button, 16 is the waterproof keyboard, 17 is the detection equipment switch button, 18 is the screen rubber gasket, 19 is the chassis fan, 20 is the side cover, 21 is the 12V power supply, 22 is the serial port, 23 is the network port interface, 24 is the USB interface, 25 is the power module, 26 is the display screen, 27 is the screen heating glass, 28 is the heating Board, 29 is the heat dissipation port, 30 is the main power switch, 31 is the insurance device, 32 is the 220V AC input aviation plug connector, 33 is the grounding wire post, 34 is the DC28V switch, 35 is the DC28V output, 36 is the X1 electrical connector, 37 is the X2 electrical connector, 38 is the X3 electrical connector, 39 is the main control module circuit board, 40 is the 1394 communication module circuit board, 41 is the AD acquisition module circuit board, 42 is the discrete quantity module circuit board, 43 is the test box body rear cover, 44 is the power board, 45 is the 1394 daughter card to be tested, 46 is the LCD display, 47 is the electrical connector, 48 is the control switch, 49 is the shell, and 50 is the test carrier. DETAILED DESCRIPTION

[0018] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0019] The present invention provides an airborne 1394 daughter card detection device, comprising a detection device and a test box body connected to each other, wherein the detection device comprises an input device, a display device, a power module, a main control module circuit board 39, a 1394 communication module circuit board 40, an AD acquisition module circuit board 41, and a discrete quantity module circuit board 42. The main control module circuit board 39 is connected to the input device and the display device, specifically, the display device can be a display screen, and the input device can be a keyboard, a mouse, etc. The main control module circuit board 39 is connected to an airborne 1394 daughter card 45 to be tested through a 1394 communication module circuit board 40, and the 1394 communication module circuit board 40 is used to perform information exchange with the airborne 1394 daughter card 45 to be tested and process signals related to 1394 bus communication. The power module supplies power to the main control module circuit board 39, the 1394 communication module circuit board 40, the AD acquisition module circuit board 41, and the discrete quantity module circuit board 42; the main control module circuit board 39 is connected to the AD acquisition module circuit board 41, and the AD acquisition module is used to collect voltage signals to obtain the power supply status of the detection equipment and the test box body; the main control module circuit board 39 is connected to the discrete quantity module circuit board 42, and the discrete quantity module circuit board 42 controls the discrete quantity output of the voltage / open circuit signal through relay control, and collects the information of the set voltage input signal; the main control module circuit board 39 is used for function processing and human-computer interaction interface, and summarizes the data collected by each module circuit board through the CPCI bus, and converts it into a video signal and sends it to the display device, that is, the main control module circuit board 39 collects, summarizes, and converts the information of the 1394 communication module circuit board 40, the AD acquisition module circuit board 41, and the discrete quantity module circuit into a video signal and sends it to the display device. The test box body includes a test carrier board 50 connected to the onboard 1394 daughter card 45 to be tested, a power board card, and a display unit. The power board card is connected to the power module to supply power to the onboard 1394 daughter card 45 to be tested, the test carrier board 50, and the display unit in the test box body. The test carrier board 50 is used to collect the transmission content of the onboard 1394 daughter card 45 to be tested, summarize it, convert it, and send it to the display unit.

[0020] Specifically, Figure 4As shown, the main control module circuit board 39 includes a CPU processor, which is an Intel I7 processor, which transmits 64-bit data with the DDR3 cache, is connected to the SSD hard disk through the SATA interface, is connected to peripheral devices such as a keyboard and a mouse through a USB interface, and is connected to an X3 electrical connector 38 through a debug serial port. The X3 electrical connector 38 is used to detect the upgrade and maintenance of the device. The main control module circuit board 39 is connected to the display device through an LVDS transmitter. Specifically, the display device can be a 15.6-inch display screen 26. The main control module circuit board 39 is connected to the 1394 single-node simulation card in the 1394 communication module circuit board 40 through a PCIE interface. Specifically, the 1394 communication module circuit board 40 includes a 1394 single-node simulation card, and the 1394 single-node simulation card simulates the CC, RN, and BM node functions in the 1394 bus. The single-node simulation card can be a single-node simulation card of model XT-MIL-1394-CPCI-EMI-1N-CRB1394 produced by Xi'an Xiangteng Electronic Technology Co., Ltd. This simulation card is mainly used to simulate the CC, RN, and BM node functions in the 1394 bus. It has an independent 1394 node and supports time synchronization, network management, asynchronous stream message communication, BM monitoring and other functions. During the test, the 1394 communication module circuit board 40 forms a communication loop with the onboard 1394 daughter card 45 to be tested, thereby realizing data transmission in the 1394 bus network. During the test, the main control module circuit board 39 reads the relevant information in the 1394 communication module circuit board 40 in real time and displays it in the display device.

[0021] Specifically, the power module 25 converts the input 220V mains power into DC28V / 5A and DC15V / 1A power, wherein the DC28V is supplied to the main control module circuit board 39, the 1394 communication module circuit board 40, and the power board 44 of the test box body, and the AD acquisition module circuit board 41 obtains the power supply status of the current detection device and the test box body by collecting the DC28V signal, and the DC15V is supplied to the discrete quantity module circuit board 42. After the mains 220V is input into the detection device, it first enters the power module 25, and the power module 25 has a +15VDC conversion circuit and a +28VDC conversion circuit inside, which respectively convert the input mains power into the 15V and 28V voltages required by each internal module and send them to each module. At the same time, the AD acquisition module circuit board 41 collects the power supply information of DC28V and sends it to the main control module circuit board 39. The discrete quantity module circuit board 42 realizes DC28V / open circuit through relay control, and at the same time, the relevant information of the DC28V input signal is sent to the main control module circuit board 39 through the CPCI bus.

[0022] Specifically, the discrete quantity module circuit board 42 includes an FPGA chip connected to the main control module, a 32-way three-state discrete quantity input card, and a relay drive circuit. The FPGA chip is connected to the 32-way three-state discrete quantity input card, the 32-way three-state discrete quantity input card is connected to the relay drive circuit, and the relay drive circuit is connected to the X1 electrical connector 36. The detection device is connected to the test box body through the X1 electrical connector 36 and the cable, and the power board 44 inside the test box body receives the power signal from the detection device from the X1 electrical connector 36.

[0023] Specifically, Figure 3 As shown, the test box body also includes a test box body rear cover plate 43, a shell 49, a power board 44, and a test carrier 50 are fixed to the test box body rear cover plate 43 by screws, and the shell 49 is provided with a control switch 48 and an electrical connector 47 for controlling the power on and off of the test box body. The display unit is fixed in the shell 49, and the test box body rear cover plate 43 is assembled and connected to the shell 49. Specifically, the display unit can be a liquid crystal display screen 46, and the power board 44 filters, surge suppresses, and isolates the DC28V voltage input by the detection equipment through the cable, and then supplies power to other parts inside the test box body. The onboard 1394 daughter card 45 to be tested is connected to the test carrier 50 through the plug-in interface and screws.

[0024] Specifically, Figure 5 As shown, the test carrier 50 includes a CPU processing unit. More specifically, the CPU processing unit includes a Loongson 2K1000 CPU, which is used to complete data interaction and processing, and the Tianmai 1 operating system runs in the chip. The CPU processing unit is interconnected with the FLASH storage through the SPI bus, and is used to store the fonts and pictures used for display. The CPU processing unit is connected to the DDR3 chip for caching the information received by the CPU. More specifically, the DDR3 chip uses the Shenzhen Guowei 2GB SM41J256M16M chip. The information of each part received by the CPU is first cached in the DDR3 chip, and then read and processed and displayed in the next step. The CPU processing unit is connected to the watchdog circuit to improve the robustness and reliability of the test carrier. It is used for the watchdog circuit, monitoring the 3V power supply in the 3V~5V microprocessor system, and performing functions such as powering on, resetting, and monitoring the CPU to achieve monitoring of the entire system. The test carrier 50 transmits and receives data with the 1394 onboard daughter card 45 to be tested via the PCIE interface. The 1394 onboard daughter card 45 to be tested converts the PCIE bus data received from the test carrier 50 into 1394 bus data and exchanges information with the testing equipment via the X2 electrical connector and cable. The test carrier 50 is connected to the LCD screen 46 via the RS422A transceiver and LVDS transmitter.

[0025] Specifically, the electrical connectors are divided into X1, X2, and X3, which correspond to the X1, X2, and X3 connectors of the detection equipment respectively. When in use, the corresponding X1 and X2 electrical connectors are connected together through cables. The X1 electrical connector mainly transmits discrete quantity signals and power signals, and the X2 electrical connector mainly transmits 1394 signals. The two X3 electrical connectors are not connected to each other and are mainly used for upgrading and maintenance of detection equipment and test boxes.

[0026] Specifically, the power board 44 of the test box body includes a power slow start circuit. The power board 44 receives the DC28V voltage from the detection equipment from the X1 electrical connector 36 and first enters the power slow start circuit, so that the current of the test box body rises slowly at the moment of startup, and then the 28V+ is sent to the TVS tube for anti-static protection treatment, and then sent to the overcurrent and overvoltage protection circuit. The overcurrent and overvoltage protection circuit is implemented by three protection chips XC388. When the input voltage is overvoltage or the subsequent circuit has an overcurrent, the chip cuts off the input voltage through hiccup protection. The output current of the overcurrent and overvoltage protection circuit is converted into 28V and 5V direct current by the DC conversion circuit, respectively. The 28V voltage is supplied to the display unit. The display unit may include a liquid crystal display 46. The liquid crystal display 46 can be connected to a heating circuit to provide an operating temperature for the liquid crystal display 46 to prevent the temperature from being too low and the liquid crystal display 46 from failing to work. The 5V voltage is supplied to the 1394 machine-mounted daughter card 45 to be tested and the test carrier 50 for power supply.

[0027] Specifically, the Figure 1-2As shown, the main control module circuit board 39, the 1394 communication module circuit board 40, the AD acquisition module circuit board 41, and the discrete quantity module circuit board 42 are assembled on the 3U8 cage 10, and the circuit boards are connected through cables and interfaces. The 3U8 cage 10 and the power module 25 are assembled in the chassis 1. Specifically, the 3U8 cage 10 is fixed in the chassis 1 through the left and right cage support frames 9, and the 3U8 cage 10 is provided with a heat dissipation port 29. The rear part of the chassis 1 is provided with a chassis rear interface cover plate 6, and the chassis rear interface cover plate 6 is provided with a main power switch 30, a safety device 31, a 220V AC input aviation plug connector 32, a grounding wire column 33, a DC28V switch 34, a DC28V output 35, an X1 electrical connector 36, an X2 electrical connector 37, and an X3 electrical connector 38, which are respectively connected to the corresponding circuits. The side of the chassis 1 is provided with a side cover 20, on which are provided a 12V power supply 21, a serial port 22, a network port interface 23, and a USB interface 24 connected to the corresponding circuits. The 12V power supply 21 is used to power the chassis fan 19. The 12V power supply can be provided by providing a 12V power conversion circuit in the power module 25 to realize that the 220V mains power is converted into 12V mains power by the power module 25 to power the chassis fan 19, and a battery can also be provided for power supply. The upper part of the chassis 1 is provided with a waterproof keyboard 16 through a keyboard cover 2, and the keyboard cover 2 is also provided with a brightness button 15 and a detection device switch button 17 connected to the device circuit. One side of the upper part of the chassis 1 is hingedly connected to the display device through a rotating shaft 11, and a rotating shaft cover 7 is provided on the rotating shaft 11. The keyboard cover 2 is provided with a screen rubber gasket 18 at the corresponding position of the display device. The display device can be a 15.6-inch display screen 26. A screen heating glass 27 is provided in front of the display screen 26. The screen heating glass 27 is connected to a heating plate 28. The heating plate 28 is connected to a power supply. When the outdoor temperature is lower than the set temperature, such as minus 5°C, the heating plate 28 starts to work and heats the display screen 26 through the heating glass 27, thereby ensuring normal operation under complex climatic conditions. The display screen 26 and the screen heating glass 27 are arranged between the screen front panel 3 and the screen rear panel 4. After the display device is assembled, it is connected through a screen locking structure 5 to fix the screen. Screen foot pads 12 can be provided at the four corners to buffer the overall structure of the screen. A chassis fan 19 is provided on the opposite side walls of the chassis 1 through a fan rack 8. A handle 14 is provided on the front side wall of the chassis 1. Chassis foot pads 13 can be provided at the four corners of the bottom of the chassis 1.

[0028] Test process such as Figure 6As shown, first, the onboard 1394 daughter card 45 to be tested is fixedly connected to the test carrier 50 in the test box body, and the cable between the test box body and the test equipment is connected. The test equipment power is turned on, the test equipment is powered on and turned on, and all electrical components inside the test equipment are powered on. The test equipment is a window system, and the relevant status of the current test equipment can be seen on the display screen 26 after the product is powered on.

[0029] The power supply module 25 inside the detection equipment outputs the DC28V voltage required by the product, and the main control module circuit board 39 reads back the programmable power supply voltage and current in real time through the serial port, and displays the relevant information on the display screen 26.

[0030] The AD acquisition module circuit board 41 and the discrete quantity module circuit board 42 acquire power supply related information of the detection device and the test box in real time and display it on the display screen 26 .

[0031] By turning on the power switch of the test box, all relevant components inside the test box are powered on at the same time. At this time, the test carrier 50 collects relevant information of the onboard 1394 daughter card 45 to be tested and displays it on the LCD screen 46. At this time, the tester can see on the LCD screen 46 whether the communication of the 1394 daughter card is normal, the data content transmitted by the 1394 bus, and other information.

[0032] When the test box and the test equipment are powered on, the self-test function of the equipment is started first. When all modules are qualified in the self-test, the test can be started. Otherwise, the function test related interface cannot be operated. At the same time, the test equipment has a log recording function, through which the operator can intuitively observe the instructions and execution process currently being executed by the test equipment.

[0033] After the self-test is passed, the test starts. At this time, the 1394 communication module circuit board 40 inside the testing device starts to communicate with the onboard 1394 daughter card 45 to be tested and form a loop. The 1394 communication module circuit board 40 inside the testing device sends a data packet to the onboard 1394 daughter card 45 to be tested inside the test box through the 1394 bus. The test carrier board 50 reads the data packet information from the onboard 1394 daughter card 45 to be tested through the interface and sends it to the register. At this time, the CPU reads the data packet information in the register and sends it to the LCD display 46 of the test box for display.

[0034] At this time, the 1394 communication module circuit board 40 inside the detection device also receives the data packet information sent from the 1394 daughter card 45 on the test box body. After the main control module reads the data packet information from the 1394 module, it summarizes it and converts it into a video signal and sends it to the display screen 26. At this time, the words "1394 communication detection function is normal" are displayed on the display screen 26 of the detection device. If the 1394 daughter card 45 on the test box fails, the words "1394 communication detection function failure" are displayed on the display screen 26 of the detection device, and the words "1394 communication failure" are also displayed on the LCD screen 46 of the test box body.

[0035] During the test, the detection equipment monitors the communication status with the 1394 daughter card 45 to be tested in real time and refreshes the display on the screen in real time. In case of emergency or failure, the test can be stopped manually. After the test is completed, the relevant test information is stored in the internal storage of the main control module circuit board 39, and the tester can call and view it at any time through the log recording function.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Alterations, modifications, substitutions and variations of the above embodiments by a person skilled in the art are all within the scope of the present invention.

Claims

1. An onboard 1394 daughter card detection device, characterized in that: The invention comprises a detection device and a test box body connected to each other, wherein the detection device comprises an input device, a display device, a power module, a main control module circuit board, a 1394 communication module circuit board, an AD acquisition module circuit board, and a discrete quantity module circuit board; the main control module circuit board is connected to the input device and the display device; the main control module circuit board is connected to the onboard 1394 daughter card to be tested through the 1394 communication module circuit board, and the 1394 communication module circuit board is used to exchange information with the onboard 1394 daughter card to be tested and process signals related to 1394 bus communication; the power module supplies power to the main control module circuit board, the 1394 communication module circuit board, the AD acquisition module circuit board, and the discrete quantity module circuit board; the main control module circuit board is connected to the AD acquisition module circuit board, and the AD acquisition module is used to acquire voltage signals The main control module circuit board is connected to the discrete quantity module circuit board, and the discrete quantity module circuit board controls the discrete quantity output of the voltage / open circuit signal through a relay, and collects the information of the set voltage input signal; the main control module circuit board collects, summarizes, and converts the information of the 1394 communication module circuit board, the AD acquisition module circuit board, and the discrete quantity module circuit into a video signal and sends it to the display device; the test box body includes a test carrier board connected to the airborne 1394 daughter card to be tested, a power supply board, and a display unit. The power supply board is connected to the power module to supply power to the airborne 1394 daughter card to be tested, the test carrier board, and the display unit in the test box body. The test carrier board is used to collect the transmission content of the airborne 1394 daughter card to be tested, summarize, convert it, and send it to the display unit.

2. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The 1394 communication module circuit board includes a 1394 single-node emulation card, and the 1394 single-node emulation card emulates the CC, RN, and BM node functions in the 1394 bus.

3. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The power supply module converts the input 220V AC power into DC28V / 5A and DC15V / 1A power supplies, wherein the DC28V power is supplied to the main control module circuit board, the 1394 communication module circuit board, and the power board of the test box body; the AD acquisition module circuit board obtains the current power supply status of the detection equipment and the test box body by collecting the DC28V signal; and the DC15V is supplied to the discrete quantity module circuit board.

4. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The test box body also includes a rear cover plate of the test box body and a shell. A power board and a test carrier are fixed on the rear cover plate of the test box body. The shell is provided with a control switch and an electrical connector for controlling the power on and off of the test box body. The display unit is fixed in the shell. The rear cover plate of the test box body is assembled and connected to the shell.

5. An onboard 1394 daughter card detection device according to claim 1 or 4, characterized in that: The power board includes a power slow-start circuit. The power board sends the DC28V voltage input by the detection equipment to the TVS tube through the power slow-start circuit for anti-static protection treatment, and then sends it to the overcurrent and overvoltage protection circuit. The overcurrent and overvoltage protection circuit includes a number of protection chips. When the input voltage is overvoltage or the subsequent circuit has an overcurrent, the overcurrent and overvoltage protection circuit cuts off the input voltage. The output current of the overcurrent and overvoltage protection circuit is converted into 28V and 5V direct current by the DC conversion circuit respectively. The 28V voltage is supplied to the display unit, and the 5V voltage is supplied to the 1394 machine-borne daughter card to be tested and the test carrier board for power supply.

6. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The test carrier includes a CPU processing unit, which is interconnected with a FLASH storage and is used to store a font library and pictures used for display; the CPU processing unit is connected to a DDR3 chip and is used to cache information received by the CPU; the CPU processing unit is connected to a watchdog circuit and is used for the watchdog circuit and monitoring a 3V power supply in a 3V-5V microprocessor system, and powering on, resetting and monitoring the CPU; the test carrier receives and sends data with a 1394 onboard daughter card to be tested via a PCIE interface; and the test carrier is connected to a display unit via an RS422A transceiver and an LVDS transmitter.

7. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The main control module circuit board, 1394 communication module circuit board, AD acquisition module circuit board, and discrete quantity module circuit board are assembled on a cage; the cage and power supply module are assembled in a chassis; a chassis rear interface cover is provided at the rear of the chassis; a power switch, an electrical connector, and a mains and aviation plug are provided on the chassis rear interface cover; a serial port, a network port, and a USB port are provided on the side of the chassis; a keyboard is provided on the top of the chassis; and the display device is hingedly connected to the chassis.

8. The airborne 1394 daughter card detection device according to claim 7, characterized in that: The chassis is provided with a fan and a handle for heat dissipation in the chassis.

9. The airborne 1394 daughter card detection device according to claim 7, characterized in that: The display device is a display screen, and the display screen is connected to a display screen heating device.

10. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The display unit of the test box body is provided with a display device heating circuit.

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