An on-board 1394 daughter card detection apparatus
By designing an airborne 1394 daughter card testing device, the problem of existing equipment being unable to conduct comprehensive testing was solved, achieving efficient and accurate functional monitoring and status display, and making it suitable for airborne 1394 daughter card testing in complex environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENYANG HANGSHENG TECH CO LTD
- Filing Date
- 2025-01-24
- Publication Date
- 2026-05-19
AI Technical Summary
Existing airborne 1394 daughter card testing equipment cannot systematically and comprehensively test its functional performance, and its maintainability is poor in outdoor environments.
An airborne 1394 daughter card testing device was designed, including testing equipment and a test box. It is composed of 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. It can monitor and display the status of the airborne 1394 daughter card in real time and supports testing of data transmission rate, configuration information, and communication status.
It achieves efficient and accurate functional testing of the airborne 1394 daughter card, can work stably in complex environments, and improves testing efficiency and accuracy.
Smart Images
Figure CN119906658B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of 1394 communication detection technology, and particularly relates to an airborne 1394 daughter card detection device. Background Technology
[0002] In aircraft systems, airborne 1394 daughter cards are typically used to handle information transmission and interaction between devices and between devices and the aircraft. To ensure the accuracy of information transmission, different specifications of airborne 1394 daughter cards are used for different application scenarios. For example, the ground maintenance control board on an aircraft uses a dedicated airborne 1394 daughter card to complete information interaction with the aircraft. Due to the extremely harsh external environment on aircraft, airborne 1394 daughter cards used in this environment have strict requirements on their product functionality, transmission reliability, transmission rate, real-time interactivity, stability, and other functional performance aspects.
[0003] However, current dedicated testing equipment for airborne I394 daughter cards cannot accurately monitor and test related functional performance parameters. Instead, different devices are used to test the parameters and functions of the airborne I394 daughter card one by one, resulting in an inability to conduct systematic and comprehensive testing. Furthermore, the existing dedicated testing equipment for airborne I394 daughter cards is typically used in indoor environments such as laboratories, and its usability and maintainability are poor in outdoor environments such as airport ground support and field testing. 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 testing device, which can specifically test the airborne 1394 daughter card including data transmission rate, configuration information, communication status and other related functions. At the same time, it can also monitor the status of the airborne 1394 daughter card in real time and display it on the screen. The testing efficiency is high and the accuracy is high.
[0005] To achieve the above objectives, the main technical solutions adopted by the present invention include:
[0006] An airborne 1394 daughter card testing device includes interconnected testing equipment and a test housing. The testing equipment includes 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 under test via the 1394 communication module circuit board, which is used for information interaction with the 1394 daughter card under test and for processing 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. The module is used to acquire voltage signals to obtain the power supply status of the detection equipment and the test box; the main control module circuit board is connected to the discrete quantity module circuit board, which controls the discrete quantity output of the voltage / open circuit signal through relay control, and acquires the information of the set voltage input signal; the main control module circuit board acquires, summarizes and converts the information of the 1394 communication module circuit board, AD acquisition module circuit board and discrete quantity module circuit into video signals and sends them to the display device; the test box includes a test carrier board for connecting to the 1394 daughter card under test, a power board and a display unit. The power board is connected to the power module and supplies power to the 1394 daughter card under test, the test carrier board and the display unit in the test box. The test carrier board is used to acquire the transmission content of the 1394 daughter card under test, summarize and convert it and send it to the display unit.
[0007] Furthermore, the 1394 communication module circuit board includes a 1394 single-node emulation card, which emulates the CC, RN, and BM node functions in the 1394 bus.
[0008] Furthermore, the power module converts the input 220V AC mains power into DC28V / 5A and DC15V / 1A power supplies. The DC28V power supplies the main control module circuit board, the 1394 communication module circuit board, and the power supply board of the test box. The AD acquisition module circuit board obtains the current power supply status of the detection equipment and the test box by acquiring the DC28V signal. The DC15V power supplies the discrete quantity module circuit board.
[0009] Furthermore, the test box also includes a test box rear cover plate, a housing, a power board and a test carrier plate fixed to the test box rear cover plate, a control switch and an electrical connector for controlling the power on and off of the test box on the housing, a display unit fixed inside the housing, and the test box rear cover plate and the housing are assembled and connected.
[0010] Furthermore, the power supply board includes a power soft-start circuit. The power supply board sends the DC 28V voltage input from the detection device through the power soft-start circuit to the TVS diode for electrostatic discharge protection before sending it to the overcurrent and overvoltage protection circuit. The overcurrent and overvoltage protection circuit includes several protection chips. When the input voltage is over-voltage or the downstream circuit is over-current, 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 DC power by the DC conversion circuit, respectively. The 28V voltage supplies power to the display unit, and the 5V voltage supplies power to the 1394 onboard daughter card under test and the test carrier board.
[0011] Furthermore, the test carrier board includes a CPU processing unit, which is interconnected with FLASH memory to store the font library and images used for display; the CPU processing unit is connected to a DDR3 chip to cache information received by the CPU; the CPU processing unit is connected to a watchdog circuit to monitor the 3V power supply in the 3V~5V microprocessor system, and to power on, reset, and monitor the CPU; the test carrier board transmits and receives data with the 1394 onboard daughter card under test through a PCIE interface; the test carrier board is connected to the display unit through an RS422A transceiver and an LVDS transmitter.
[0012] Furthermore, 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 are assembled on the chassis. The chassis and the power module are assembled in a cabinet. The rear of the cabinet is provided with a rear interface cover. The rear interface cover is provided with a power switch, an electrical connector, and a mains power connector. The side of the cabinet is provided with a serial port, a network port, and a USB port. The top of the cabinet is provided with a keyboard. The display device is hinged to the cabinet.
[0013] Furthermore, the chassis is equipped with a fan and a handle for heat dissipation inside the chassis.
[0014] Furthermore, the display device is a display screen, and the display screen is connected to a display screen heating device.
[0015] Furthermore, the display unit of the test box is equipped with a display device heating circuit.
[0016] The beneficial effects of this invention are: The airborne 1394 daughter card testing device of this invention can specifically test and monitor airborne 1394 daughter cards, including data transmission and real-time communication functions. It can monitor the current system version, status information, communication status, and specific transmitted data of the airborne 1394 daughter card in real time and display this information on the screen. It offers high testing efficiency, high accuracy, and ease of use. Attached Figure Description
[0017] Figure 1This is a schematic diagram of the overall structure of the airborne 1394 daughter card detection device of the present invention;
[0018] Figure 2 This is an exploded view of the airborne 1394 daughter card detection device of the present invention;
[0019] Figure 3 This is an exploded view of the test box of the present invention;
[0020] Figure 4 This is a schematic diagram of the circuit board connection principle of the testing equipment of the present invention;
[0021] Figure 5 This is a schematic diagram of the connection principle of the test box of this invention;
[0022] Figure 6 This invention presents a schematic diagram of the testing process.
[0023] In the diagram: 1 is the chassis, 2 is the keyboard cover, 3 is the front panel of the screen, 4 is the rear panel of the screen, 5 is the screen locking structure, 6 is the rear interface cover of the chassis, 7 is the hinge cover, 8 is the fan bracket, 9 is the left and right chassis support brackets, 10 is the 3U8 chassis, 11 is the hinge, 12 is the screen feet, 13 is the chassis feet, 14 is the handle, 15 is the brightness button, 16 is the waterproof keyboard, 17 is the power switch button for the testing equipment, 18 is the screen rubber pad, 19 is the chassis fan, 20 is the side panel, 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 heated glass for the screen, and 28 is the heating element. 29 is the heat dissipation vent, 30 is the main power switch, 31 is the fuse, 32 is the 220V AC input connector, 33 is the grounding 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 rear cover, 44 is the power board, 45 is the 1394 daughter card under test, 46 is the LCD display, 47 is the electrical connector, 48 is the control switch, 49 is the housing, and 50 is the test carrier board. Detailed Implementation
[0024] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0025] This invention provides an airborne 1394 daughter card testing device, comprising interconnected testing equipment and a test housing. The testing equipment includes 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 screen, and the input device can be a keyboard, mouse, etc. The main control module circuit board 39 is connected to the airborne 1394 daughter card 45 under test via the 1394 communication module circuit board 40. The 1394 communication module circuit board 40 is used for information interaction with the airborne 1394 daughter card 45 under test and for processing signals related to 1394 bus communication. The power supply module provides 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, which is used to acquire voltage signals to obtain the power supply status of the detection device and the test box. The main control module circuit board 39 is also connected to the discrete quantity module circuit board 42, which uses a relay to control the discrete output of the voltage / open circuit signal and acquires information of the set voltage input signal. The main control module circuit board 39 is used for function processing and human-machine interaction interface. It summarizes the data acquired by each module circuit board through the CPCI bus and converts it into a video signal to be sent to the display device. In other words, the main control module circuit board 39 acquires, summarizes, converts, and sends the information of the 1394 communication module circuit board 40, the AD acquisition module circuit board 41, and the discrete quantity module circuit to the display device. The test box includes a test carrier board 50 for connecting to the 1394 daughter card 45 under test, a power board, and a display unit. The power board is connected to the power module and supplies power to the 1394 daughter card 45 under test, the test carrier board 50, and the display unit in the test box. The test carrier board 50 is used to collect the transmission content of the 1394 daughter card 45 under test, summarize and convert it, and then send it to the display unit.
[0026] Specifically, such as Figure 4As shown, the main control module circuit board 39 includes a CPU processor, which is an Intel I7 processor. It transmits data to the DDR3 cache via 64-bit data, connects to an SSD hard drive via a SATA interface, connects to peripheral devices such as a keyboard and mouse via a USB interface, and connects to an X3 electrical connector 38 via a debug serial port. The X3 electrical connector 38 is used for testing device upgrades and maintenance. The main control module circuit board 39 is connected to a display device via 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 emulation card in the 1394 communication module circuit board 40 via a PCIe interface. Specifically, the 1394 communication module circuit board 40 includes a 1394 single-node emulation card, which emulates the CC, RN, and BM node functions in the 1394 bus. The single-node emulation card can be the XT-MIL-1394-CPCI-EMI-1N-CRB1394 single-node emulation card manufactured by Xi'an Xiangteng Electronics Technology Co., Ltd. This emulation card is mainly used to emulate the CC, RN, and BM node functions in the 1394 bus. It has one independent 1394 node and supports functions such as timing, network management, asynchronous stream message communication, and BM monitoring. During testing, the 1394 communication module circuit board 40 and the 1394 daughter card 45 under test form a communication loop, thereby realizing data transmission of the 1394 bus network. During testing, the main control module circuit board 39 reads the relevant information from the 1394 communication module circuit board 40 in real time and displays it on the display device.
[0027] Specifically, the power module 25 converts the input 220V AC mains power into DC28V / 5A and DC15V / 1A power supplies. The DC28V power supplies the main control module circuit board 39, the 1394 communication module circuit board 40, and the power board 44 of the test box. The AD acquisition module circuit board 41 obtains the current power supply status of the testing equipment and the test box by acquiring the DC28V signal. The DC15V power supplies the discrete quantity module circuit board 42. After the 220V AC mains power is input into the testing equipment, it first enters the power module 25. The power module 25 contains a +15VDC conversion circuit and a +28VDC conversion circuit, which convert the input AC mains power into the 15V and 28V voltages required by the various internal modules and send them to the respective modules. Simultaneously, the AD acquisition module circuit board 41 acquires the DC28V power supply information and sends it to the main control module circuit board 39. The discrete quantity module circuit board 42 uses relay control to achieve DC28V / open circuit, and simultaneously sends the relevant information of the DC28V input signal to the main control module circuit board 39 via the CPCI bus.
[0028] Specifically, the discrete quantity module circuit board 42 includes an FPGA chip connected to the main control module, a 32-channel tri-state discrete quantity input card, and a relay driver circuit. The FPGA chip is connected to the 32-channel tri-state discrete quantity input card, the 32-channel tri-state discrete quantity input card is connected to the relay driver circuit, and the relay driver circuit is connected to the X1 electrical connector 36. The testing equipment and the test box are connected via the X1 electrical connector 36 and cables. The power board 44 inside the test box receives the power signal from the testing equipment from the X1 electrical connector 36.
[0029] Specifically, such as Figure 3 As shown, the test box also includes a rear cover plate 43, a housing 49, a power board 44, and a test carrier plate 50, which are fixed to the rear cover plate 43 with screws. The housing 49 is equipped with a control switch 48 and an electrical connector 47 for controlling the power supply of the test box. The display unit is fixed inside the housing 49. The rear cover plate 43 and the housing 49 are assembled and connected. Specifically, the display unit can be an LCD screen 46. The power board 44 filters, suppresses surges, and isolates the DC28V voltage input from the testing equipment via cable before supplying power to other parts inside the test box. The device-on-demand 1394 daughter card 45 is connected to the test carrier plate 50 via a plug-in interface and screws.
[0030] Specifically, such as Figure 5 As shown, the test carrier board 50 includes a CPU processing unit, more specifically, a Loongson 2K1000 CPU, used for data interaction and processing, running the Tianmai 1 operating system within the chip. The CPU processing unit is interconnected with FLASH memory via an SPI bus to store the font library and images used for display. The CPU processing unit is connected to a DDR3 chip to cache information received by the CPU. More specifically, the DDR3 chip is a 2GB SM41J256M16M chip from Shenzhen Guowei. Information received by the CPU is first cached in the DDR3 chip, and then read and processed for further display. The CPU processing unit is connected to a watchdog circuit to improve the robustness and reliability of the test carrier board. The watchdog circuit monitors the 3V power supply in the 3V~5V microprocessor system, performing functions such as power-on, reset, and monitoring of the CPU, thus achieving system-wide monitoring. The test carrier board 50 transmits and receives data with the 1394 onboard daughter card 45 under test via a PCIe interface. The 1394 onboard daughter card 45 converts the PCIe bus data received from the test carrier board 50 into 1394 bus data and exchanges information with the testing equipment through an X2 electrical connector and cable. The test carrier board 50 is connected to the LCD display 46 via an RS422A transceiver and an LVDS transmitter.
[0031] Specifically, the electrical connectors are divided into X1, X2, and X3, which correspond to the X1, X2, and X3 connectors of the testing equipment, respectively. In use, the X1 and X2 electrical connectors are connected together by a cable. The X1 electrical connector mainly transmits discrete signals and power signals, the X2 electrical connector mainly transmits 1394 signals, and the X3 electrical connector is not connected to either the X1 or X2 electrical connectors. It is mainly used for upgrading and maintaining the testing equipment and test box.
[0032] Specifically, the power supply board 44 of the test box includes a power soft-start circuit. The power supply board 44 receives the DC 28V voltage from the testing device via the X1 connector 36, which first enters the power soft-start circuit, causing the current in the test box to rise slowly at startup. Then, the 28V+ is sent to the TVS diode for electrostatic discharge protection before being sent to the overcurrent and overvoltage protection circuit. The overcurrent and overvoltage protection circuit uses three XC388 protection chips. When an overvoltage occurs in the input voltage or an overcurrent occurs in the subsequent circuit, the chip cuts off the input voltage through a hiccup-type protection mechanism. The output current of the overcurrent and overvoltage protection circuit is converted into 28V and 5V DC by a DC conversion circuit. The 28V voltage supplies power to the display unit, which may include an LCD screen 46. The LCD screen 46 can be connected to a heating circuit to provide operating temperature for the LCD screen 46, preventing it from malfunctioning due to low temperature. The 5V voltage supplies power to the 1394 onboard daughter card 45 under test and the test carrier board 50.
[0033] Specifically, the aforementioned 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 chassis 10, and the circuit boards are connected to each other via ribbon cables and interfaces. The 3U8 chassis 10 and the power module 25 are assembled inside the chassis 1. Specifically, the 3U8 chassis 10 is fixed inside the chassis 1 by left and right chassis support frames 9, and the 3U8 chassis 10 is provided with heat dissipation vents 29. The rear of the chassis 1 is provided with a chassis rear interface cover 6, which is equipped with a main power switch 30, a fuse device 31, a 220V AC input connector 32, a grounding post 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 chassis 1 has a side cover 20 on its side, on which are a 12V power supply 21, a serial port 22, a network 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 converted from 220V AC mains power to 12V AC mains power by setting a 12V power conversion circuit in the power module 25 to power the chassis fan 19, or it can be powered by a battery. The upper part of the chassis 1 has a waterproof keyboard 16 through a keyboard cover 2. The keyboard cover 2 also has 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 hinged to the display device through a hinge 11. The hinge 11 has a hinge cover 7. The keyboard cover 2 has a screen rubber pad 18 at the corresponding position of the display device. The display device can be a 15.6-inch display screen 26. A 15.6-inch heated glass 27 is located in front of the display screen 26. The heated glass 27 is connected to a heating plate 28, which is connected to a power source. When the outdoor temperature is lower than a set temperature, such as -5°C, the heating plate 28 starts working and heats the display screen 26 through the heated glass 27, thus ensuring normal operation under complex climatic conditions. The display screen 26 and the heated glass 27 are positioned between the front panel 3 and the rear panel 4. After assembly, the display device is connected by a screen locking structure 5 to secure the screen. Screen feet 12 can be installed at the four corners to cushion the overall screen structure. A chassis fan 19 is mounted on the opposite side walls of the chassis 1 via a fan bracket 8. A handle 14 is located on the front side wall of the chassis 1, and chassis feet 13 can be installed at the four corners of the bottom of the chassis 1.
[0034] The testing process is as follows Figure 6As shown, first, the device under test (DUT) 1394 daughter card 45 is fixedly connected to the test carrier board 50 inside the test box, and the cable between the test box and the testing equipment is connected. The testing equipment is then powered on, and all internal electrical components are simultaneously powered on. The testing equipment runs on a Windows system; after powering on, the relevant status of the testing equipment can be seen on the display screen 26.
[0035] The internal power module 25 of the testing equipment outputs the DC28V voltage required by the product. 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.
[0036] The AD acquisition module circuit board 41 and the discrete quantity module circuit board 42 acquire power-related information of the detection equipment and test box in real time and display it on the display screen 26.
[0037] Turn on the power switch of the test box, and all relevant components inside the test box will be powered on at the same time. At this time, the test carrier board 50 collects relevant information of the 1394 daughter card 45 under test and displays it on the LCD screen 46. At this time, the tester can see information such as whether the 1394 daughter card communication is normal and the data content transmitted by the 1394 bus on the LCD screen 46.
[0038] After both the test box and the testing equipment are powered on, the equipment self-test function is activated first. Testing can only begin after all modules have passed the self-test; otherwise, the relevant testing interfaces cannot be operated. The testing equipment also has a log recording function, allowing operators to visually observe the instructions being executed and the execution process.
[0039] After passing the self-test, the test begins. At this time, the 1394 communication module circuit board 40 inside the testing equipment starts communicating with the 1394 daughter card 45 under test and forms a loop. The 1394 communication module circuit board 40 inside the testing equipment sends data packets to the 1394 daughter card 45 under test inside the test box through the 1394 bus. The test board 50 reads the data packet information from the 1394 daughter card 45 under test through the interface and sends it into the register. At this time, the CPU reads the data packet information in the register and sends it to the LCD screen 46 of the test box for display.
[0040] At this time, the circuit board 40 of the 1394 communication module inside the testing equipment also receives data packet information sent from the 1394 daughter card 45 under test in the test box. After the main control module reads the data packet information from the 1394 module, it summarizes it and converts it into a video signal to be sent to the display screen 26. At this time, the display screen 26 of the testing equipment displays the words "1394 communication test function normal". If the 1394 daughter card 45 under test malfunctions, the display screen 26 of the testing equipment displays the words "1394 communication test function fault", and the LCD screen 46 of the test box also displays the words "1394 communication fault".
[0041] During testing, the testing equipment monitors the communication status with the 1394 daughter card 45 under test in real time and refreshes the display on the screen. In case of emergency or malfunction, the test can be manually stopped. 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 access and view it at any time through the log recording function.
[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modifications, alterations, substitutions, and variations made by those skilled in the art to the above embodiments are within the scope of the present invention.
Claims
1. An airborne 1394 daughter card detection device, characterized in that: The test includes interconnected detection equipment and a test housing. The detection equipment includes 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 1394 daughter card under test (DUT) via the 1394 communication module circuit board, which is used for information exchange with the DUT and processing 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, which is used to acquire voltage signals to obtain the power supply status of the detection equipment and the test housing. The main control module circuit board is also connected to the discrete quantity module circuit board, which uses relays to control the voltage / open circuit signal. The discrete quantity output collects information from the set voltage input signal. The main control module circuit board collects, summarizes, and converts the information from the 1394 communication module circuit board, AD acquisition module circuit board, and discrete quantity module circuit board into video signals, which are then sent to the display device. The test box includes a test carrier board for connecting to the 1394 daughter card under test, a power supply board, and a display unit. The power supply board is connected to the power module and supplies power to the 1394 daughter card under test, the test carrier board, and the display unit in the test box. The test carrier board is used to collect the transmission content of the 1394 daughter card under test, summarize it, convert it, and send it to the display unit. The discrete quantity module circuit board includes an FPGA chip connected to the main control module, a 32-channel tri-state discrete quantity input card, and a relay drive circuit. The FPGA chip is connected to the 32-channel tri-state discrete quantity input card, the 32-channel tri-state discrete quantity input card is connected to the relay drive circuit, and the relay drive circuit is connected to an X1 electrical connector. The testing device and the test box are connected via an X1 electrical connector and a cable.
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, which 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 module converts the input 220V AC mains power into DC28V / 5A and DC15V / 1A power. The DC28V power supplies the main control module circuit board, the 1394 communication module circuit board, and the power board of the test box. The AD acquisition module circuit board obtains the current power supply status of the detection equipment and the test box by acquiring the DC28V signal. The DC15V power supplies the discrete quantity module circuit board.
4. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The test box also includes a test box rear cover plate and a housing. A power board and a test carrier plate are fixed to the test box rear cover plate. The housing is equipped with a control switch and an electrical connector for controlling the power supply of the test box. The display unit is fixed inside the housing. The test box rear cover plate is assembled and connected to the housing.
5. An airborne 1394 daughter card detection device according to claim 1 or 4, characterized in that: The power board includes a power soft-start circuit. The power board sends the DC 28V voltage input from the testing device through the power soft-start circuit to the TVS diode for electrostatic discharge protection before sending it to the overcurrent and overvoltage protection circuit. The overcurrent and overvoltage protection circuit includes several protection chips. When the input voltage is over-voltage or the downstream circuit is over-current, 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 DC by the DC conversion circuit, respectively. The 28V voltage supplies the display unit, and the 5V voltage supplies the 1394 daughter card under test and the test carrier board.
6. The airborne 1394 daughter card detection device according to claim 1, characterized in that: The test carrier board includes a CPU processing unit, which is interconnected with FLASH memory to store the font library and images used for display. The CPU processing unit is connected to a DDR3 chip to cache information received by the CPU. The CPU processing unit is connected to a watchdog circuit to monitor the 3V power supply in the 3V~5V microprocessor system, and to power on, reset, and monitor the CPU. The test carrier board transmits and receives data with the onboard 1394 daughter card of the device under test through a PCIE interface. The test carrier board is connected to the display unit through 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 the chassis. The chassis and power module are assembled in a cabinet. The rear of the cabinet is provided with a rear interface cover. The rear interface cover is provided with a power switch, electrical connector, and AC power connector. The side of the cabinet is provided with a serial port, network port, and USB port. The top of the cabinet is provided with a keyboard. The display device is hinged to the cabinet.
8. The airborne 1394 daughter card detection device according to claim 7, characterized in that: The chassis is equipped with a fan and a handle for heat dissipation inside 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 is equipped with a display device heating circuit.