A PXI bus-based electronic flight bag testing system and method

Abstract

This invention discloses an electronic flight bag testing system and method based on a PXI bus. The device includes a testing unit that generates setting channel signals and test signals according to test procedures, receives status signals, analog signals, and Ethernet signals, and judges the results based on preset values ​​to generate a test report; a PXI controller that transmits and processes setting channel signals, test signals, analog signals, status signals, and Ethernet signals, and provides a PXI bus interface; a PXI channel control unit that selects test channels based on setting channel signals; a PXI Ethernet switching unit that collects, transmits, and exchanges Ethernet data; a PXI analog acquisition unit that provides integrated data acquisition for analog signals; and a PXI status detection unit that reads status data from sensors and logic devices. Compared to traditional testing methods, this invention replaces wired connections with board-based device plug-ins, achieving integrated testing, reducing testing costs, and improving testing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of civil aviation testing technology, and specifically relates to an electronic flight bag testing system and method based on PXI bus. Background Technology

[0002] In recent years, the civil aviation industry has flourished. With the delivery of domestically produced commercial aircraft such as the ARJ21-700 and C919 to airlines, the production and testing of airborne equipment has entered the mass production stage. The Electronic Flight Bag (EFB), as an information terminal assisting pilots in supporting normal flight operations, is an essential component in the aircraft installation process. Therefore, ensuring the normal delivery of the EFB is of paramount importance. Currently, the testing methods for EFBs have significant drawbacks. The testing process requires setting up a test environment, connecting multiple test devices via wiring, and testing each device individually according to its different functions. This results in poor test method versatility, complex system structure, high testing costs, and large space requirements. To address these issues, a novel PXI bus-based EFB testing system is urgently needed. This system uses plug-in board devices instead of independent wired connections, reducing testing space requirements and improving system stability. Furthermore, it should enable one-click completion of multiple functional tests, automatic generation and printing of test reports, significantly shortening testing time and improving testing efficiency. Summary of the Invention

[0003] In view of this, in order to solve the problems of poor versatility, complex structure, high testing cost, and large space occupation of traditional testing systems, this invention provides an electronic flight bag testing system based on a PXI bus, including a PXI controller and a testing unit, a PXI channel control unit, a PXI Ethernet switching unit, a PXI analog signal acquisition unit, and a PXI status signal detection unit all connected to it.

[0004] The test unit communicates with the PXI channel control unit, PXI Ethernet switching unit, PXI analog quantity acquisition unit and PXI status quantity detection unit through the PXI controller, so as to collect and detect data during the operation of the electronic flight bag, including analog quantity acquisition, status quantity detection, Ethernet switching and channel settings.

[0005] The PXI controller transmits and processes setting channel signals, test signals, analog signals, status signals, and Ethernet signals, and provides a PXI bus interface;

[0006] The PXI channel control unit is also connected to the PXI analog quantity acquisition unit and the PXI status quantity detection unit. The PXI channel control unit includes a status signal switching module and an analog signal switching module, which can select the test channel according to the set channel signal.

[0007] The PXI Ethernet switching unit includes an Ethernet interface module for exchanging Ethernet data between the electronic flight bag, the accompanying test equipment, and the PXI controller.

[0008] The PXI analog signal acquisition unit includes an analog signal acquisition module for data acquisition of analog signals, including multi-channel isolation and synchronous sampling. The analog signals under test include the voltage of the electronic flight bag, the voltage of the accompanying equipment, and the voltage of the +18V~+36V programmable DC power supply.

[0009] The PXI status detection unit includes a status detection module and an oscilloscope module. It reads the status data of the brightness sensor and custom buttons of the electronic flight bag, removes relay jitter by setting the input filter, and connects the oscilloscope module to the USB interface of the PXI controller to manually troubleshoot problems when the test fails.

[0010] Preferably, the PXI controller includes an embedded zero-slot controller and a PXI chassis, wherein the embedded zero-slot controller is equipped with an operating system for transmitting and processing setting channel signals, test signals, Ethernet signals, analog signals and status signals; the PXI chassis provides a PXI bus interface.

[0011] Preferably, the PXI channel control unit status signal switching module includes a status relay module and a status indicator light, which are integrated on a single board. The channel signal is set by controlling the normally open relay of the channel to close through the status relay module, thereby illuminating the status indicator light of the channel. The two input channels of the status relay module are respectively connected to the brightness sensor and the custom button of the electronic flight bag, and the output channel is connected to the status quantity detection module. A high-power electromechanical relay is used, and the normally open contact of the relay receives the control signal to select the status quantity test channel.

[0012] Preferably, the status detection module includes 32 drain and / or source inputs, and the maximum input current output to the PXI controller is 475mA; according to the configured safe output status, it uses a digital I / O watchdog timer to detect and repair computer or application malfunctions.

[0013] Preferably, the analog signal switching module includes an analog signal conditioning module, an analog relay module, and an analog indicator light. The 19 input channels of the analog signal conditioning module are connected to the power supply port of the test equipment, the 2 input channels are connected to the power supply port of the programmable DC power supply and the electronic flight bag, and the output channel is connected to the analog quantity acquisition module, which attenuates the analog signal by 10 times before transmitting it to the analog quantity acquisition module.

[0014] Preferably, the analog signal acquisition module includes 32 analog input channels, each channel is independent of the others, and when multiple channels are working, the maximum sampling frequency is 1MSa / s. The input channels are connected to the output channels of the analog signal conditioning module.

[0015] Preferably, the analog relay module adopts a double-pole single-throw relay, with 17 analog relay channels connected to the camera power supply section and the programmable DC power supply of the test equipment, and 2 analog relay channels connected to the video server power supply section and the programmable DC power supply of the test equipment.

[0016] Preferably, the Ethernet interface module includes four 10 / 100 / 1000M adaptive Ethernet digital acquisition networks, one interface connected to the Ethernet interface of the electronic flight bag, two interfaces connected to the accompanying test equipment, and one interface connected to the Ethernet interface of the PXI controller.

[0017] Preferably, the accompanying testing equipment includes two video servers, four cockpit door cameras, four passenger cabin cameras, eight cargo hold cameras, and one downward-facing camera. The two video servers transmit the video image data received by each camera to the electronic flight bag display via an Ethernet interface.

[0018] To achieve the above objectives, the present invention also provides a method for testing an electronic flight bag based on a PXI bus, comprising the following steps:

[0019] S10: The test procedure is read through the file management module of the test department. According to the test procedure, the test channel to be tested is selected and the channel setting signal is generated. The PXI controller processes the channel setting signal and transmits it to the PXI channel control department.

[0020] S20, the PXI channel control unit sets the test channel according to the set channel signal, the status signal switching module and the relay action in the analog signal switching module, the corresponding channel indicator light is lit, and the corresponding channel indicator light in the test unit is green;

[0021] S30, the test department generates test signals through the test module according to the test procedure, and the PXI controller processes the test signals and transmits them to the PXI Ethernet switching department, the PXI analog quantity acquisition department and the PXI status quantity detection department.

[0022] S40, the status quantity detection module detects status quantities based on the test signal and reads the status data of the brightness sensor and the custom button; the analog quantity acquisition module acquires analog quantities based on the test signal and performs an interrupt power supply experiment; the Ethernet interface module receives and transmits data packets based on the test signal and judges whether it is qualified based on the preset value.

[0023] S50 allows users to view test data and generate test reports through the database management module in the testing department, and print test reports through the file management module.

[0024] Beneficial Effects: The system replaces the traditional wired connection method of multiple devices in testing systems with board-based device integration. Board connections improve the stability and flexibility of the testing system, significantly enhancing its performance. The PXI bus inherits from the PCI bus, boasting a transmission speed of up to 528 Mbytes / s. It provides more bandwidth, power, and heat dissipation, making the system more stable. Furthermore, it features a unified bus interface, allowing users to flexibly build testing systems based on their chosen modules, offering extremely high flexibility and scalability. Testers can use this system to complete electronic flight bag testing, greatly improving testing efficiency and reducing testing costs. Attached Figure Description

[0025] Figure 1 This is a structural block diagram of the electronic flight bag test system based on the PXI bus according to an embodiment of the present invention;

[0026] Figure 2 This is a detailed structural diagram of the PXI bus-based electronic flight bag testing system according to an embodiment of the present invention;

[0027] Figure 3 This is a connection diagram of the auxiliary testing equipment for the PXI bus-based electronic flight bag testing system according to an embodiment of the present invention. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] See system implementation examples Figure 1 , Figure 2 It includes a PXI controller 101 and connected to it a test unit 106, a PXI channel control unit 102, a PXI Ethernet switching unit 103, a PXI analog signal acquisition unit 104, and a PXI status signal detection unit 105, wherein...

[0030] The test unit 106 communicates with the PXI channel control unit 102, the PXI Ethernet switching unit 103, the PXI analog quantity acquisition unit 104 and the PXI status quantity detection unit 105 through the PXI controller 101, thereby acquiring and detecting data during the operation of the electronic flight bag 100, including analog quantity acquisition, status quantity detection, Ethernet switching and channel settings.

[0031] Test unit 106 further includes:

[0032] The analog quantity testing module is used for acquiring and monitoring analog quantities, detecting ripple, noise, and extreme values, and displaying test data. Analog quantities include the voltage of the electronic flight bag 100, the voltage of the accompanying equipment 150, and the +18V~+36V programmable DC power supply 160. It also features a 200ms power interruption test button to enable 200ms power interruption experiments on the testing equipment.

[0033] The status quantity test module is used to detect the signal pulses generated by status quantities, simulate various scans to detect signals, and display the test curves in graphical and tabular form. The test curves include the output waveform of the brightness sensor 110 and the pulse waveform of the custom button 120.

[0034] The Ethernet test module is used to configure IP addresses and send simulation data. It includes an IP settings button, a command-line start button, and a simulated avionics data send button.

[0035] The system calibration module is used to calibrate each channel of the acquisition module before testing. During calibration, the rated voltage is provided to each channel, and channels with a deviation of ±0.1V or more will be highlighted in red.

[0036] The user management module distinguishes between administrators and regular users, granting them different access permissions to the database. Administrator accounts have the ability to create new test processes and modify test parameters, while regular user accounts can only perform E-Flight Bag 100 tests, view test results, and generate test reports based on pre-set parameters.

[0037] The database management module is used to manage the stored test data. Users can fill in preset configuration information based on the test data to generate test reports.

[0038] The file management module is used to view test procedures and save test reports; the help module is used to quickly find and print files.

[0039] The PXI controller 101 transmits and processes setting channel signals, test signals, analog signals, status signals, and Ethernet signals, and provides a PXI bus interface;

[0040] The PXI channel control unit 102 is also connected to the PXI analog quantity acquisition unit 104 and the PXI status quantity detection unit 105. The PXI channel control unit 102 includes a status signal switching module 21 and an analog signal switching module 22, which can select the test channel according to the set channel signal.

[0041] PXI Ethernet switching unit 103 includes Ethernet interface module 31, which performs Ethernet data exchange with electronic flight bag 100, test equipment 150 and PXI controller 101.

[0042] The PXI analog acquisition unit 104 includes an analog acquisition module 41 for acquiring data for analog signals, including multi-channel isolation and synchronous sampling. The analog quantities to be measured include the voltage of the electronic flight bag 100, the voltage of the accompanying device 150, and the voltage of the +18V~+36V programmable DC power supply 160.

[0043] The PXI status detection unit 105 includes a status detection module 51 and an oscilloscope module 52. It reads the status data of the brightness sensor 110 and the custom button 120 of the electronic flight bag 100, removes relay jitter by setting the input filter, and connects the oscilloscope module 52 to the USB interface of the PXI controller 101 to manually troubleshoot problems when the test fails.

[0044] The PXI controller 101 includes an embedded zero-slot controller 11 and a PXI chassis 12. The embedded zero-slot controller 11 contains an operating system for transmitting and processing setting channel signals, test signals, Ethernet signals, analog signals, and status signals. The PXI chassis 12 provides a PXI bus interface.

[0045] The PXI channel control unit 102 status signal switching module 21 includes a status relay module and a status indicator light, which are integrated on a single board. The channel setting signal controls the normally open relay of the channel to close, and the status indicator light of the channel is lit. The two input channels of the status relay module are respectively connected to the brightness sensor 110 and the custom button 120 of the electronic flight bag 100, and the output channel is connected to the status quantity detection module 51. A high-power electromechanical relay is used, and the normally open contact of the relay receives the control signal to select the status quantity test channel.

[0046] The status detection module 51 includes 32 drain and / or source inputs, and the maximum input current to the PXI controller 101 is 475mA. According to the configured safe output status, it uses a digital I / O watchdog timer to detect and repair computer or application faults.

[0047] The analog signal switching module 22 includes an analog signal conditioning module 221, an analog relay module, and analog indicator lights. The 19 input channels of the analog signal conditioning module 221 are connected to the power supply port (28V voltage interface 140 in the figure) of the test equipment 150, and the 2 input channels are connected to the power supply port (28V voltage interface 140 in the figure) of the programmable DC power supply 160 and the electronic flight bag 100. The output channel is connected to the analog quantity acquisition module 41, and the analog signal is attenuated by 10 times before being transmitted to the analog quantity acquisition module 41.

[0048] The analog signal acquisition module 41 includes 32 analog input channels, each of which is independent of the others. When multiple channels are working, the maximum sampling frequency is 1 MSa / s. The input channels are connected to the output channels of the analog signal conditioning module 221.

[0049] The analog relay module uses double-pole single-throw relays. The 17 analog relay channels are connected to the camera power supply section of the test equipment 150 and the programmable DC power supply 160, respectively. The 2 analog relay channels are connected to the video server power supply section of the test equipment 150 and the programmable DC power supply 160, respectively.

[0050] The Ethernet interface module 31 includes four 10 / 100 / 1000M adaptive Ethernet digital acquisition networks, one interface connected to the Ethernet interface 130 of the electronic flight bag 100, two interfaces connected to the test equipment 150, and one interface connected to the Ethernet interface of the PXI controller 101.

[0051] See Figure 3 The testing equipment 150 includes two video servers 155, four cockpit door cameras 151, four passenger cabin cameras 152, eight cargo hold cameras 153, and one downward-view camera 154. The two video servers 155 transmit the video image data received by each camera to the electronic flight bag 100 for display via an Ethernet interface. For power supply, the power supply is controlled by a programmable DC power supply 160 via the camera power supply switch and the server power supply switch in the testing relay module 170.

[0052] In a specific embodiment, the PXI controller 101 consists of an embedded zero-slot controller 11 (PXIe-8840 module) and a PXI chassis 12 (PXIe-1082), with the embedded zero-slot controller 11 installed in the PXI chassis 12.

[0053] Specifically, the embedded zero-slot controller 11 supports up to 8 GB / s system bandwidth and 4 GB / s slot bandwidth. Its built-in dual-core Intel processor provides powerful data processing capabilities, and 4GB of memory ensures sufficient data throughput. It offers a smaller footprint and higher performance when transmitting and processing setup channel signals, test signals, analog signals, status signals, and Ethernet signals. The integrated Windows operating system and drivers are compatible with various testing software, providing strong compatibility. The PXI chassis 12 features a high-bandwidth 8-slot backplane, providing up to four hybrid slots to support standard PXI hybrid bus modules, offering excellent compatibility and scalability.

[0054] The PXI channel control unit 102 consists of a status signal switching module 21 and an analog signal switching module 22.

[0055] Specifically, the status signal switching module 21 is implemented by an NIPXI-2527 module. The 32 I / O channels utilize electromechanical relays, with contacts capable of carrying a maximum voltage of 300V and a current of 2A. Normally open contacts receive control signals, enabling selection of status quantity test channels. Based on the configured safety output status, a digital I / O watchdog timer can detect and repair computer or application malfunctions. Two input channels are connected to the brightness sensor 110 and the custom button 120 of the electronic flight bag 100, respectively, and the output channel is connected to the status quantity detection module 51.

[0056] Specifically, the analog signal switching module 22 consists of an NIPXI-2521 module and an analog signal conditioning module 221. The NIPXI-2521 module uses a double-pole single-throw relay. Its 17 input channels are connected to the camera power supply section and the programmable DC power supply 160 of the test equipment 150, respectively, and its 2 input channels are connected to the video server 155 power supply section and the programmable DC power supply 160 of the test equipment 150, respectively. The analog signal conditioning module 221 has 32 channels. The input channels are connected to the NIPXI-2521 module, and the 32 analog signals are attenuated by 10 times and transmitted to the analog signal acquisition system through resistor voltage division.

[0057] The Ethernet switching unit is implemented by the Ethernet interface module 31PXI-8522, providing a data transmission rate of up to 1000Mbps and supporting the UDP protocol. It has four independent Gigabit Ethernet interfaces: one interface connects to the Ethernet interface 130 of the electronic flight bag 100, two interfaces connect to the video server, and one interface connects to the Ethernet interface of the PXI controller 101, enabling conflict-free data transmission, Ethernet functionality, and verification of avionics parameter communication functions.

[0058] The PXI status detection unit 105 consists of a status detection module 51 (NIPXI-6515) and an oscilloscope module 52. The oscilloscope module 52 is connected to the USB interface of the PXI controller 101, facilitating manual troubleshooting when tests fail.

[0059] Specifically, the NIPXI-6515 module provides 32 drain / source inputs, with a maximum input current of 475mA output to the PXI controller 101. Group isolation is provided for every 8 channels, and a programmable filter is used to eliminate glitches / spiking. Two group-spaced input channels are connected to the brightness sensor 110 and the custom button 120 of the electronic flight bag 100, respectively, to read the output waveform of the brightness sensor 110 and the pulse waveform of the custom button 120. The 32 output channels are connected to the status detection module 51.

[0060] The PXI analog acquisition unit 104 is implemented by the analog acquisition module 41 PXIe-6363, providing integrated data acquisition for analog signals. The analog acquisition module 41 includes 32 independent analog input channels, enabling multi-channel isolation and synchronous sampling. The input channels are connected to the output channels of the analog signal conditioning module 221. When multiple channels are operating, the maximum sampling frequency is 1 MSa / s. To improve measurement accuracy, the PXIe-6363 module supports advanced timing functions provided by NI-STC3, featuring four 32-bit timers.

[0061] The analog quantities being measured include: electronic flight bag voltage, camera voltage, video server voltage, and +18V~+36V programmable DC power supply, all of which have a measurement range of +18V~+36V.

[0062] As can be seen, the above-mentioned electronic flight bag test system using the PXI bus of the present invention solves the problems of complex electronic flight bag test equipment and high test cost, and greatly improves the test efficiency of electronic flight bags.

[0063] In a specific embodiment, the present invention also provides an electronic flight bag testing method based on a PXI bus, comprising the following steps:

[0064] S201. The test procedure is read through the test department's file management module. Based on the test procedure, the required test channel is selected, and a channel setting signal is generated. The PXI controller processes the channel setting signal via the TCP / IP protocol and transmits it to the PXI channel control system.

[0065] According to the set channel signals, the S202 and PXI channel control systems activate two relay channels in the status signal switching module, illuminating their indicator lights; similarly, they activate 21 relay channels in the analog signal switching module, also illuminating their indicator lights. In the testing software, the indicator lights for the two channels in the status quantity testing module and the 21 channels in the analog quantity testing module are both green.

[0066] S203. In the main interface of the test software system, click "Start Test." The status quantity test module interface will pop up first. Wait for the output waveform of the brightness sensor. Adjust the light intensity of the electronic flight bag. The screen brightness of the electronic flight bag will change accordingly. The status quantity test module displays and analyzes the output waveform. According to the waveform range preset in the test procedure, it judges whether the function is normal. If it is normal, wait for the pulse waveform of the custom button. Press and hold the custom button on the electronic flight bag for more than 0.5 seconds. The corresponding button in the status quantity test module interface will change from red to green, indicating that the function is normal. The status quantity test ends.

[0067] S204. The analog quantity test module interface pops up, displaying and recording the voltage output from the analog quantity acquisition module, including the voltage of the electronic flight bag, the voltage of the accompanying equipment, and the +18V~+36V programmable DC power supply. Adjust the voltage of the programmable DC power supply to 18V and 36V respectively, and observe whether the electronic flight bag interface is normal. If there is no change, the function is normal. Set the voltage back to 28V. Click the 200ms interrupt test. The analog signal switching module in the PXI channel system will activate, disconnecting 21 relays for 200ms and then re-engaging. Check whether the voltage of the analog quantity test interface is normal, and observe whether the electronic flight bag interface is normal. If normal, the analog quantity test ends.

[0068] The S205 Ethernet test module interface pops up. Set the IP address to 172.20.2.1, and test network connectivity by pinging 172.20.2.3 using the command line. If data packets are received, the network is connected, and the Ethernet function is verified to be normal. Click the "Send" button to send simulated avionics data via the Ethernet interface. Check the electronic flight bag's file system, locate the avionics simulation data file, and confirm if it has been updated. If it has been updated, the Ethernet test ends. The Ethernet test module interface disappears, returning to the main interface of the test software system.

[0069] S206. Click "End Test". The test data is stored in the database. You can view the test data and test results through the test database management module, generate a test report, and print the test report through the file management module.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electronic flight bag testing system based on a PXI bus, characterized in that, This includes a PXI controller and connected components such as a test unit, a PXI channel control unit, a PXI Ethernet switching unit, a PXI analog acquisition unit, and a PXI status detection unit. The test unit communicates with the PXI channel control unit, PXI Ethernet switching unit, PXI analog quantity acquisition unit and PXI status quantity detection unit through the PXI controller, so as to collect and detect data during the operation of the electronic flight bag, including analog quantity acquisition, status quantity detection, Ethernet switching and channel settings. The PXI controller transmits and processes setting channel signals, test signals, analog signals, status signals, and Ethernet signals, and provides a PXI bus interface; The PXI channel control unit is also connected to the PXI analog quantity acquisition unit and the PXI status quantity detection unit. The PXI channel control unit includes a status signal switching module and an analog signal switching module, which can select the test channel according to the set channel signal. The PXI Ethernet switching unit includes an Ethernet interface module for exchanging Ethernet data between the electronic flight bag, the accompanying test equipment, and the PXI controller. The PXI analog signal acquisition unit includes an analog signal acquisition module for data acquisition of analog signals, including multi-channel isolation and synchronous sampling. The analog signals under test include the voltage of the electronic flight bag, the voltage of the accompanying equipment, and the voltage of the +18V~+36V programmable DC power supply. The PXI status detection unit includes a status detection module and an oscilloscope module. It reads the status data of the brightness sensor and custom buttons of the electronic flight bag, removes relay jitter by setting the input filter, and connects the oscilloscope module to the USB interface of the PXI controller to manually troubleshoot problems when the test fails.

2. The PXI bus-based electronic flight bag testing system according to claim 1, characterized in that, The PXI controller includes an embedded zero-slot controller and a PXI chassis. The embedded zero-slot controller contains an operating system for transmitting and processing setting channel signals, test signals, Ethernet signals, analog signals, and status signals. The PXI chassis provides a PXI bus interface.

3. The PXI bus-based electronic flight bag testing system according to claim 1, characterized in that, The PXI channel control unit's status signal switching module includes a status relay module and a status indicator light, which are integrated on a single board. The channel signal is set by controlling the normally open relay of the channel to close via the status relay module, thus illuminating the channel's status indicator light. The two input channels of the status relay module are connected to the brightness sensor and a custom button of the electronic flight bag, respectively, while the output channel is connected to the status quantity detection module. A high-power electromechanical relay is used, with its normally open contact receiving control signals to select the status quantity test channel.

4. The PXI bus-based electronic flight bag testing system according to claim 1, characterized in that, The status detection module includes 32 drain and / or source inputs, and the maximum input current to the PXI controller is 475mA. Based on the configured safe output status, it uses a digital I / O watchdog timer to detect and repair computer or application malfunctions.

5. The PXI bus-based electronic flight bag testing system according to claim 1, characterized in that, The analog signal switching module includes an analog signal conditioning module, an analog relay module, and analog indicator lights. The 19 input channels of the analog signal conditioning module are connected to the power supply port of the accompanying test equipment, the 2 input channels are connected to the power supply port of the programmable DC power supply and the electronic flight bag, and the output channel is connected to the analog quantity acquisition module, which attenuates the analog signal by 10 times before transmitting it to the analog quantity acquisition module.

6. The PXI bus-based electronic flight bag testing system according to claim 5, characterized in that, The analog signal acquisition module includes 32 analog input channels, each independent of the others. When multiple channels are working, the maximum sampling frequency is 1 MSa / s. The input channels are connected to the output channels of the analog signal conditioning module.

7. The PXI bus-based electronic flight bag testing system according to claim 5, characterized in that, The analog relay module uses a double-pole single-throw relay. The 17 analog relay channels are connected to the camera power supply and the programmable DC power supply of the test equipment, respectively, and the 2 analog relay channels are connected to the video server power supply and the programmable DC power supply of the test equipment, respectively.

8. The PXI bus-based electronic flight bag testing system according to claim 1, characterized in that, The Ethernet interface module includes four 10 / 100 / 1000M adaptive Ethernet digital acquisition networks, one interface connected to the Ethernet interface of the electronic flight bag, two interfaces connected to the accompanying test equipment, and one interface connected to the Ethernet interface of the PXI controller.

9. The PXI bus-based electronic flight bag testing system according to claim 1, characterized in that, The accompanying testing equipment includes two video servers, four cockpit door cameras, four passenger cabin cameras, eight cargo hold cameras, and one downward-facing camera. The two video servers transmit the video image data received by each camera to the electronic flight bag display via an Ethernet interface.

10. A test method for an electronic flight bag based on a PXI bus, characterized in that, The system according to any one of claims 1-9 includes the following steps: S10: The test procedure is read through the file management module of the test department. According to the test procedure, the test channel to be tested is selected and the channel setting signal is generated. The PXI controller processes the channel setting signal and transmits it to the PXI channel control department. S20, the PXI channel control unit sets the test channel according to the set channel signal, the status signal switching module and the relay action in the analog signal switching module, the corresponding channel indicator light is lit, and the corresponding channel indicator light in the test unit is green; S30, the test department generates test signals through the test module according to the test procedure, and the PXI controller processes the test signals and transmits them to the PXI Ethernet switching department, the PXI analog quantity acquisition department and the PXI status quantity detection department. S40, the status quantity detection module detects status quantities based on the test signal and reads the status data of the brightness sensor and the custom button; the analog quantity acquisition module acquires analog quantities based on the test signal and performs an interrupt power supply experiment; the Ethernet interface module receives and transmits data packets based on the test signal and judges whether it is qualified based on the preset value. S50 allows users to view test data and generate test reports through the database management module in the testing department, and print test reports through the file management module.

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