PXI bus-based electronic flight bag test system and method

Abstract

The invention discloses an electronic flight bag test system and method based on a PXI bus, and the device comprises a test part which generates a set channel signal and a test signal according to a test procedure, receives a state signal, an analog signal and an Ethernet signal, judges a result according to a preset value, and generates a test report; the PXI controller transmits and processes set channel signals, test signals, analog quantity signals, state quantity signals and Ethernet signals, and provides a PXI bus interface; the PXI channel control part realizes selection of a test channel according to a set channel signal; the PXI Ethernet exchange part is used for acquiring, transmitting and exchanging Ethernet data; the PXI analog quantity acquisition part provides integrated data acquisition for analog signals; the PXI state quantity detection unit reads state data of the sensor and the logic device. Compared with a traditional testing method, the method has the advantages that a testing equipment wire connection mode is replaced by board card equipment insertion connection, testing integration is achieved, testing cost is reduced, and testing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of civil aviation testing, and in particular relates to an electronic flight bag testing system and method based on a PXI bus. Background Art

[0002] In recent years, the civil aviation industry has flourished. With the delivery of domestic commercial aircraft ARJ21-700 and C919 to airlines, the production and testing of airborne equipment has entered the mass production stage. As an information terminal that assists pilots in supporting the normal operation of flights, the electronic flight bag is a must-have during the installation of the aircraft. Therefore, it is of great significance to ensure the normal delivery of the electronic flight bag. At present, the test method of the electronic flight bag has significant shortcomings. During the test process, it is necessary to build a test environment, connect multiple test equipment by wiring, and test one by one according to different functions. There are problems such as poor versatility of the test method, complex system structure, high test cost, and large test space. In order to solve these problems, it is urgent to propose a new electronic flight bag test system based on PXI bus, which uses board card device plug-in instead of independent device wiring, which not only reduces the test space but also improves the stability of the test system. In addition, it is also necessary to realize the one-click completion of multiple functional tests, automatic generation and printing of test reports, which greatly shortens the test time and improves the test efficiency. Summary of the invention

[0003] In view of this, in order to solve the problems of poor universality, complex structure, high test cost and large test space occupied by the traditional test system, the present invention provides an electronic flight bag test system based on PXI bus, including a PXI controller and a test part, a PXI channel control part, a PXI Ethernet switch part, a PXI analog quantity acquisition part and a PXI state quantity detection part all connected thereto, wherein: The test unit communicates with the PXI channel control unit, the PXI Ethernet switch unit, the PXI analog quantity acquisition unit and the PXI state quantity detection unit through the PXI controller, so as to collect and detect the data of the electronic flight bag during operation, including analog quantity acquisition, state quantity detection, Ethernet switching and channel setting; The PXI controller transmits and processes setting channel signals, test signals, analog quantity signals, status quantity 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 state quantity detection unit. The PXI channel control unit includes a state signal switching module and an analog signal switching module, and realizes the selection of the test channel according to the setting channel signal; The PXI Ethernet switching unit includes an Ethernet interface module for performing Ethernet data exchange between the electronic flight bag, the accompanying test equipment and the PXI controller; The PXI analog quantity acquisition unit includes an analog quantity acquisition module, which performs data acquisition for analog signals, including multi-channel isolation and synchronous sampling. The measured analog quantities include the voltage of the electronic flight bag, the voltage of the accompanying test equipment, and the voltage of the +18V~+36V programmable DC power supply; The PXI state quantity detection unit includes a state quantity detection module and an oscilloscope module, which reads the state data of the brightness sensor and the custom button of the electronic flight bag, removes the jitter of the relay by setting the input filter, and the oscilloscope module is connected to the USB interface of the PXI controller to manually troubleshoot the problem when the test fails.

[0004] Preferably, the PXI controller comprises 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; and the PXI chassis provides a PXI bus interface.

[0005] 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 board. The channel signal is set to close the normally open relay of the control channel through the status relay module, and the status indicator light of the channel is set to light up; 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 state quantity detection module, using a high-power electromechanical relay, and the normally open contact of the relay receives the control signal to select the state quantity test channel.

[0006] Preferably, the state quantity 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 safety output state, the digital I / O watchdog timer is used to detect and repair the computer or application when a fault occurs.

[0007] 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 accompanying test equipment, the 2 input channels are connected to the programmable DC power supply and the power supply port of the electronic flight bag, and the output channel is connected to the analog quantity acquisition module. The analog signal is attenuated 10 times and then transmitted to the analog quantity acquisition module.

[0008] Preferably, the analog quantity acquisition module includes 32 analog input channels, each channel is independent of each other, and when multiple channels are working, the maximum sampling frequency is 1MSa / s, and the input channel is connected to the output channel of the analog signal conditioning module.

[0009] Preferably, the analog relay module adopts a double-pole single-throw relay, 17 analog relay channels are respectively connected to the camera power supply part and the programmable DC power supply of the accompanying test equipment, and 2 analog relay channels are respectively connected to the video server power supply part and the programmable DC power supply of the accompanying test equipment.

[0010] Preferably, the Ethernet interface module includes four channels supporting 10 / 100 / 1000M adaptive Ethernet digital acquisition networks, one channel interface is connected to the Ethernet interface of the electronic flight bag, two channels interface are connected to the accompanying test equipment, and one channel interface is connected to the Ethernet interface of the PXI controller.

[0011] Preferably, the accompanying test equipment includes two video servers, 4 cockpit door cameras, 4 cabin cameras, 8 cargo hold cameras and a downward view camera. The two video servers transmit the video image data received by each camera to the electronic flight bag display through an Ethernet interface.

[0012] Based on the above purpose, the present invention also provides an electronic flight bag testing method based on PXI bus, comprising the following steps: S10, reading the test procedure through the file management module of the test unit, selecting the test channel to be tested according to the test procedure and generating a channel setting signal, and the PXI controller processes the channel setting signal and transmits it to the PXI channel control unit; S20, the PXI channel control unit sets the test channel according to the set channel signal, the relay action in the status signal switching module and the analog signal switching module, the indicator light of the corresponding channel is lit, and the indicator light of the corresponding channel in the test unit is green; S30, the test unit generates a test signal through the test module according to the test procedure, and the PXI controller processes the test signal and transmits it to the PXI Ethernet switch unit, the PXI analog quantity acquisition unit, and the PXI state quantity detection unit; S40, the state quantity detection module detects the state quantity according to the test signal and reads the state data of the brightness sensor and the custom button; the analog quantity acquisition module collects analog quantities and performs power interruption experiments according to the test signal, and the Ethernet interface module receives and transmits data packets according to the test signal and determines whether it is qualified according to the preset value; S50, checking the test data and generating a test report through the database management module in the test department, and printing the test report through the file management module. Beneficial effects: The mode of connecting multiple devices to each other in the traditional test system is replaced by plugging in the board device. The board connection improves the stability and flexibility of the test system and greatly enhances the performance of the test system. The PXI bus inherits the PCI bus and has a transmission performance of up to 528Mbyte / s. It provides more bandwidth, power supply and heat dissipation functions, making the system more stable. And with a unified bus interface, users can flexibly build a test system according to the modules of their choice, which has extremely high flexibility and scalability. Testers can use this system to complete the test of the electronic flight bag, which greatly improves the test efficiency and reduces the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The structure diagram of the electronic flight bag test system based on PXI bus according to the embodiment of the present invention; Figure 2 Detailed structural diagram of an electronic flight bag test system based on PXI bus according to an embodiment of the present invention; Figure 3 The present invention is a connection diagram of the accompanying test equipment of the electronic flight bag test system based on the PXI bus according to the embodiment of the present invention. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0015] System examples see Figure 1 , Figure 2 , including a PXI controller 101 and a test unit 106, a PXI channel control unit 102, a PXI Ethernet switch unit 103, a PXI analog quantity acquisition unit 104 and a PXI state quantity detection unit 105, all of which are connected thereto, wherein: The testing 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 state quantity detection unit 105 through the PXI controller 101, so as to collect and detect the data of the electronic flight bag 100 during operation, including analog quantity acquisition, state quantity detection, Ethernet switching and channel setting; The testing unit 106 further includes: The analog quantity test module is used for collecting and monitoring analog quantities, detecting ripple, noise and extreme values, and displaying test data. The analog quantities include the voltage of the electronic flight bag 100, the voltage of the accompanying test equipment 150, and the +18V~+36V programmable DC power supply 160. It also has a 200ms power interruption test button to implement a 200ms power interruption experiment on the test equipment.

[0016] The state quantity test module is used to detect the signal pulse generated by the state quantity, simulate various scans to detect the signal, and display the test curve in the form of graphs and tables. The test curve includes the output waveform of the brightness sensor 110 and the pulse waveform of the custom button 120.

[0017] Ethernet test module, used to configure IP address and send simulation data. It has IP setting button, command line start button and simulation avionics data sending button.

[0018] 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 the channels with deviations above ±0.1V will be highlighted in red.

[0019] The user management module is used to distinguish between administrators and ordinary users, and to partition the access to the database. The administrator account has the function of creating a new test process and modifying test parameters, while the ordinary user account can only perform the EFB 100 test, view the test results and generate a test report according to the set parameters.

[0020] The database management module is used to manage the stored test data. Users can fill in the preset configuration information according to the test data and generate a test report.

[0021] The file management module is used to view the test procedures and save the test reports; the help module is used to quickly find and print files.

[0022] The PXI controller 101 transmits and processes setting channel signals, test signals, analog quantity signals, status quantity signals and Ethernet signals, and provides a PXI bus interface; The PXI channel control unit 102 is also connected to the PXI analog quantity acquisition unit 104 and the PXI state quantity detection unit 105. The PXI channel control unit 102 includes a state signal switching module 21 and an analog signal switching module 22, and realizes the selection of the test channel according to the setting channel signal; The PXI Ethernet switch 103 includes an Ethernet interface module 31, which performs Ethernet data exchange between the electronic flight bag 100, the accompanying test equipment 150 and the PXI controller 101; The PXI analog quantity acquisition unit 104 includes an analog quantity acquisition module 41, which performs data acquisition for analog signals, including multi-channel isolation and synchronous sampling. The measured analog quantities include the voltage of the electronic flight bag 100, the voltage of the accompanying test equipment 150, and the voltage of the +18V~+36V programmable DC power supply 160; The PXI state quantity detection unit 105 includes a state quantity detection module 51 and an oscilloscope module 52, which reads the state data of the brightness sensor 110 and the custom button 120 of the electronic flight bag 100, and removes the jitter of the relay by setting the input filter. The oscilloscope module 52 is connected to the USB interface of the PXI controller 101, and manually troubleshoots the problem when the test fails.

[0023] The PXI controller 101 includes an embedded zero-slot controller 11 and a PXI chassis 12, wherein the embedded zero-slot controller 11 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 12 provides a PXI bus interface.

[0024] The status signal switching module 21 of the PXI channel control unit 102 includes a status relay module and a status indicator light, which are integrated on a board. The channel signal is set to control the normally open relay of the channel to be closed through the status relay module, and the status indicator light of the channel is set to light up; 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 state quantity detection module 51, using a high-power electromechanical relay, and the normally open contact of the relay receives the control signal to select the state quantity test channel.

[0025] The state quantity detection module 51 includes 32 drain and / or source inputs, and the maximum input current output to the PXI controller 101 is 475mA; according to the configured safety output state, the digital I / O watchdog timer is used to detect and repair computer or application failures.

[0026] The analog signal switching module 22 includes an analog signal conditioning module 221, an analog relay module and an analog indicator light. The 19 input channels of the analog signal conditioning module 221 are connected to the power supply port of the accompanying test equipment 150 (the 28V voltage interface 140 in the figure), and the 2 input channels are connected to the programmable DC power supply 160 and the power supply port of the electronic flight bag 100 (the 28V voltage interface 140 in the figure). The output channel is connected to the analog quantity acquisition module 41, and the analog signal is attenuated 10 times and then transmitted to the analog quantity acquisition module 41.

[0027] The analog quantity acquisition module 41 includes 32 analog input channels, each channel is independent of each other, and when multiple channels are working, the maximum sampling frequency is 1MSa / s, and the input channel is connected to the output channel of the analog signal conditioning module 221 .

[0028] The analog relay module adopts a double-pole single-throw relay, and 17 analog relay channels are respectively connected to the camera power supply part of the accompanying test equipment 150 and the programmable DC power supply 160, and 2 analog relay channels are respectively connected to the video server power supply part of the accompanying test equipment 150 and the programmable DC power supply 160.

[0029] The Ethernet interface module 31 includes four channels supporting 10 / 100 / 1000M adaptive Ethernet digital acquisition networks, one channel is connected to the Ethernet interface 130 of the electronic flight bag 100 , two channels are connected to the accompanying test equipment 150 , and one channel is connected to the Ethernet interface of the PXI controller 101 .

[0030] See also Figure 3 The accompanying test equipment 150 includes two video servers 155, four cockpit door cameras 151, four cabin cameras 152, eight cargo hold cameras 153 and a lower 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 through the Ethernet interface. In terms of power supply, the power switch is controlled by the programmable DC power supply 160 through the camera power switch and the server power switch in the accompanying test relay module 170.

[0031] In a specific embodiment, the PXI controller 101 is composed of an embedded zero-slot controller 11 (PXIe-8840 module) and a PXI chassis 12 (PXIe-1082), and the embedded zero-slot controller 11 is installed in the PXI chassis 12 .

[0032] Specifically, the embedded zero-slot controller 11 supports up to 8 GB / s system bandwidth and 4 GB / s slot bandwidth. The built-in dual-core Intel processor provides powerful data processing capabilities, and the 4G memory meets sufficient data throughput, providing smaller usage space and higher performance when transmitting and processing setting channel signals, test signals, analog signals, state signals, and Ethernet signals. The Windows operating system and driver can be adapted to a variety of test software and have strong compatibility. The PXI chassis 12 is equipped with a high-bandwidth 8-slot backplane, providing up to four hybrid slots to support compatible standard PXI hybrid bus modules, and has good compatibility and scalability.

[0033] The PXI channel control unit 102 is composed of a state signal switching module 21 and an analog signal switching module 22 .

[0034] Specifically, the state signal switching module 21 is implemented by the NIPXI-2527 module. The 32 I / O channels use electromechanical relays, and the contacts can carry a maximum voltage of 300V and a current of 2A. The normally open contacts receive control signals to realize the selection of the state quantity test channel. According to the configured safety output state, the digital I / O watchdog timer can be used to detect and repair the computer or application when a failure occurs. The two input channels 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 state quantity detection module 51.

[0035] Specifically, the analog signal switching module 22 is composed of a NIPXI-2521 module and an analog signal conditioning module 221. The NIPXI-2521 module uses a double-pole single-throw relay, and 17 input channels are respectively connected to the camera power supply part and the program-controlled DC power supply 160 of the accompanying test equipment 150, and 2 input channels are respectively connected to the video server 155 power supply part and the program-controlled DC power supply 160 of the accompanying test equipment 150. The analog signal conditioning module 221 has 32 channels, and the input channels are connected to the NIPXI-2521 module. The 32 analog signals are attenuated by 10 times through resistance voltage division and transmitted to the analog quantity acquisition system.

[0036] The Ethernet switch is implemented by the Ethernet interface module 31PXI-8522, which provides a data transmission rate of up to 1000Mbps and supports the UDP protocol. Four independent Gigabit Ethernet interfaces, one interface is connected to the Ethernet interface 130 of the electronic flight bag 100, two interfaces are connected to the video server, and one interface is connected to the Ethernet interface of the PXI controller 101, to achieve conflict-free data transmission and Ethernet function and avionics parameter communication function verification.

[0037] The PXI state quantity detection unit 105 is composed of a state quantity detection module 51NIPXI-6515 and an oscilloscope module 52. The oscilloscope module 52 is connected to the USB interface of the PXI controller 101, so as to facilitate manual troubleshooting when the test fails.

[0038] Specifically, the NIPXI-6515 module provides 32 drain / source inputs, and the maximum input current output to the PXI controller 101 can reach 475 mA. Each 8-channel channel provides group isolation, and a programmable filter is used to eliminate burrs / spikes. The 2-channel group-spaced input channels are respectively connected to the brightness sensor 110 and the custom button 120 of the electronic flight bag 100, and the output waveform of the brightness sensor 110 and the pulse waveform of the custom button 120 are read. The output 32 channels are connected to the state quantity detection module 51.

[0039] The PXI analog quantity acquisition unit 104 is implemented by the analog quantity acquisition module 41PXIe-6363, which provides integrated data acquisition for analog signals. The analog quantity acquisition module 41 includes 32 analog input channels, each of which is independent of each other, to achieve multi-channel isolation and synchronous sampling. The input channel is connected to the output channel of the analog signal conditioning module 221. When multiple channels are working, the sampling frequency is up to 1MSa / s. In order to improve the accuracy of the measurement, the PXIe-6363 module supports NI-STC3 to provide advanced timing functions and has 4 32-bit timers.

[0040] Among them, the measured analog quantities include: electronic flight bag voltage, camera voltage, video server voltage, +18V~+36V programmable DC power supply, and the measurement range is +18V~+36V;.

[0041] It can be seen that the 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 the electronic flight bag.

[0042] In a specific embodiment, the present invention further provides an electronic flight bag testing method based on a PXI bus, comprising the following steps: S201, read the test procedure through the file management module of the test department. According to the test procedure, select the test channel to be tested and generate a set channel signal. The PXI controller processes the set channel signal through the TCP / IP protocol and transmits it to the PXI channel control system.

[0043] S202, PXI channel control system, according to the set channel signal, the 2-way relay channel in the state signal switching module is turned on, the indicator light is on, and the 21-way relay channel in the analog signal switching module is turned on, and the indicator light is on. In the test software, the 2-way channel indicator light in the state quantity test module is green, and the 21-way channel indicator light in the analog quantity test module is green.

[0044] S203. In the main interface of the test software system, click Start Test. The state quantity test module interface pops 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 changes accordingly. The state quantity test module displays and analyzes the output waveform. According to the waveform range preset in the test procedure, judge whether the function is normal or not. If it is normal, wait for the pulse waveform of the custom button. Long press the custom button on the electronic flight bag for more than 0.5s. The corresponding button in the state quantity test module interface changes from red to green, which means the function is normal. The state quantity test ends.

[0045] S204, the analog test module interface pops up, displaying and recording the voltage output from the analog acquisition module, including the voltage of the electronic flight bag, the voltage of the accompanying test 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 interface of the electronic flight bag is normal. If there is no change, the function is normal, and the voltage is turned back to 28V. Click the 200ms interrupt test, and the analog signal switching module in the PXI channel system will disconnect 21 relays for 200ms and then close them again to check whether the voltage of the analog test interface is normal, and observe whether the interface of the electronic flight bag is normal. If it is normal, the analog test is over.

[0046] S205, the Ethernet test module interface pops up, set the IP address to 172.20.2.1, and test whether the network is connected through the command line ping172.20.2.3. If it shows that the data packet is received, the network is connected and the Ethernet function is normal. Click the send button to send the simulated avionics data through the Ethernet interface, check the file system of the electronic flight bag, find the avionics simulation data file and confirm whether it has been updated. If it has been updated, the Ethernet test ends. The Ethernet test module interface disappears and returns to the main interface of the test software system.

[0047] S206. Click to end the test, store the test data in the database, 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. The above are only 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 in the protection scope of the present invention.

Claims

1. An electronic flight bag test system based on PXI bus, characterized in that: It includes a PXI controller and a test unit, a PXI channel control unit, a PXI Ethernet switch unit, a PXI analog quantity acquisition unit and a PXI state quantity detection unit connected thereto, wherein: The test unit communicates with the PXI channel control unit, the PXI Ethernet switch unit, the PXI analog quantity acquisition unit and the PXI state quantity detection unit through the PXI controller, so as to collect and detect the data of the electronic flight bag during operation, including analog quantity acquisition, state quantity detection, Ethernet switching and channel setting; The PXI controller transmits and processes setting channel signals, test signals, analog quantity signals, status quantity 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 state quantity detection unit. The PXI channel control unit includes a state signal switching module and an analog signal switching module, and realizes the selection of the test channel according to the setting channel signal; The PXI Ethernet switching unit includes an Ethernet interface module for performing Ethernet data exchange between the electronic flight bag, the accompanying test equipment and the PXI controller; The PXI analog quantity acquisition unit includes an analog quantity acquisition module, which performs data acquisition for analog signals, including multi-channel isolation and synchronous sampling. The measured analog quantities include the voltage of the electronic flight bag, the voltage of the accompanying test equipment, and the voltage of the +18V~+36V programmable DC power supply; The PXI state quantity detection unit includes a state quantity detection module and an oscilloscope module, which reads the state data of the brightness sensor and the custom button of the electronic flight bag, removes the jitter of the relay by setting the input filter, and the oscilloscope module is connected to the USB interface of the PXI controller to manually troubleshoot the problem when the test fails.

2. The PXI bus-based electronic flight bag test system according to claim 1, characterized in that: 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.

3. The PXI bus-based electronic flight bag test system according to claim 1, characterized in that: The PXI channel control part status signal switching module includes a status relay module and a status indicator light, which are integrated on a board. The channel signal is set to control the normally open relay of the channel to be closed through the status relay module, and the status indicator light of the channel is set to light up; 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 state quantity detection module, using a high-power electromechanical relay, and the normally open contact of the relay receives the control signal to select the state quantity test channel.

4. The PXI bus-based electronic flight bag test system according to claim 1, characterized in that: The state quantity 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 safety output state, the digital I / O watchdog timer is used to detect and repair the computer or application when a fault occurs.

5. The PXI bus-based electronic flight bag test system according to claim 1, characterized in that: 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 accompanying test equipment, the 2 input channels are connected to the programmable DC power supply and the power supply port of the electronic flight bag, and the output channel is connected to the analog quantity acquisition module. The analog signal is attenuated 10 times and then transmitted to the analog quantity acquisition module.

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

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

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

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

10. A method for testing an electronic flight bag based on a PXI bus, characterized in that: The system according to any one of claims 1 to 9 comprises the following steps: S10, reading the test procedure through the file management module of the test unit, selecting the test channel to be tested according to the test procedure and generating a channel setting signal, and the PXI controller processes the channel setting signal and transmits it to the PXI channel control unit; S20, the PXI channel control unit sets the test channel according to the set channel signal, the relay action in the status signal switching module and the analog signal switching module, the indicator light of the corresponding channel is lit, and the indicator light of the corresponding channel in the test unit is green; S30, the test unit generates a test signal through the test module according to the test procedure, and the PXI controller processes the test signal and transmits it to the PXI Ethernet switch unit, the PXI analog quantity acquisition unit, and the PXI state quantity detection unit; S40, the state quantity detection module detects the state quantity according to the test signal and reads the state data of the brightness sensor and the custom button; the analog quantity acquisition module collects analog quantities and performs power interruption experiments according to the test signal, and the Ethernet interface module receives and transmits data packets according to the test signal and determines whether it is qualified according to the preset value; S50, checking the test data and generating a test report through the database management module in the test department, and printing the test report through the file management module.

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