A flat display pre-distortion correction performance detection device

Abstract

This invention discloses a device for testing the pre-distortion correction performance of a head-up display (HUD), comprising pre-distortion correction performance measurement and control software, a distortion correction module testing component, and a distortion correction module under test. The pre-distortion correction performance measurement and control software is built into a host computer and provides a function for calculating the point-by-point position error between the theoretically distorted data of the excitation image and the video data output by the distortion correction module under test. The distortion correction module testing component provides the power supply and excitation data required for the operation of the distortion correction module under test, and acquires and displays the output of the distortion correction module under test. After pre-distorting the input DVI excitation video signal, the distortion correction module under test converts the RGB video signal into a DVI video signal. The pre-distortion correction performance measurement and control software performs pixel-by-pixel analysis and comparison of the images before and after distortion correction, and sends the DVI signal to a monitor for display. This invention provides a convenient and reliable method for testing the pre-distortion correction performance of HUDs and improves testing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of aircraft avionics technology, specifically relating to a head-up display pre-distortion correction performance testing device. Background Technology

[0002] The Head-Up Display (HUDS) system is an important subsystem of the aircraft's avionics system and a crucial guarantee for improving flight safety.

[0003] Because head-up displays (HUDs) provide pilots with critical information such as flight attitude and guidance, this information is projected onto a transparent combination mirror directly in front of the pilot after passing through an optical system and focused at infinity. This information directly affects the pilot's judgment of the flight status and can easily lead to misjudgments, resulting in serious flight accidents. Since the image is distorted after passing through the optical system, pre-distortion processing of the video is required within the HUD. As the core module of the HUD system, the distortion correction module receives DVI video, performs pre-distortion correction and anti-aliasing processing, and converts the pre-distortion-corrected RGB timing data into video data that meets the image source timing requirements, enabling the head-up display. Therefore, whether the pre-distortion correction of the distortion correction module meets the design requirements is crucial. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a head-up display (HUD) pre-distortion correction performance testing device, comprising pre-distortion correction performance measurement and control software, a distortion correction module testing component, and a distortion correction module under test. The pre-distortion correction performance measurement and control software is built into a host computer, providing a function to calculate the point-by-point position error between the theoretically distorted data of the excitation image and the video data output by the distortion correction module under test. The distortion correction module testing component provides the power supply and excitation data required for the operation of the distortion correction module under test, and acquires and displays the output of the distortion correction module under test. After pre-distorting the input DVI excitation video signal, the distortion correction module under test converts the RGB video signal into a DVI video signal. The pre-distortion correction performance measurement and control software performs pixel-by-pixel analysis and comparison of the images before and after distortion correction, and sends the DVI signal to a monitor for display. This invention provides a convenient and reliable method for testing the pre-distortion correction performance of HUDs and improves testing efficiency.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows:

[0006] A head-up display pre-distortion correction performance testing device includes pre-distortion correction performance measurement and control software, distortion correction module testing components, and the distortion correction module under test.

[0007] The pre-distortion correction performance measurement and control software is built into the measurement and control host computer. It provides the function of calculating the point-by-point position error between the theoretical distortion data of the excitation image and the video data output by the distortion correction module under test. It can also provide distortion performance analysis, complete the data source excitation control of the DVI video of the distortion correction module test component, realize the acquisition of DVI video data after pre-distortion processing, provide DVI video with timestamps and symbol markers to the distortion correction module under test and collect its monitoring results for comparison testing, integrate and store the test results, and realize one-click printout output.

[0008] The distortion correction module test component can provide the power and excitation data required for the distortion correction module under test to work, collect and display the output of the distortion correction module under test, and verify the function and performance of the distortion correction module under test, including distortion and monitoring.

[0009] The distortion correction module test component incorporates a test excitation circuit board based on FPGA+ARM. This circuit board can automatically generate excitation video signals with timestamps and markers, and receive monitoring and processing results from the distortion correction module under test, reporting them to the pre-distortion correction performance measurement and control software. The test excitation circuit board receives image data from the pre-distortion correction performance measurement and control software, generates a DVI excitation video signal, and sends it to the distortion correction module under test. The distortion correction module under test performs pre-distortion and anti-aliasing processing on the input DVI excitation video signal, then outputs an RGB video signal to the test excitation circuit board. The test excitation circuit board converts the RGB video signal into a DVI video signal. The DVI video signal is driven by the test excitation circuit board to output four DVI channels. One DVI channel is sent to a DVI video acquisition unit, and the acquired video is transmitted to the measurement and control host computer. The pre-distortion correction performance measurement and control software performs pixel-by-pixel analysis and comparison of the images before and after distortion correction, and then sends the DVI signals to a monitor for display.

[0010] Preferably, the video capture device is a PCI-E expansion dock with a built-in DVI video capture card, which is installed independently inside the chassis.

[0011] Preferably, the distortion correction module test component is designed to be portable, making it easy for testers to carry and use independently.

[0012] Preferably, the test excitation circuit board provides 10 configurable input and 10 output discrete I / Os for testing discrete quantities of the module under test.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. This invention can realize the function of calculating the point-by-point position error between the theoretical distortion data of the excitation image and the video data output by the distortion correction module under test, and can provide pre-distortion performance analysis, which can be used to determine whether the pre-distortion correction performance of the distortion correction module meets the requirements.

[0015] 2. This invention can provide DVI video with timestamps and symbol markers to the distortion correction module and collect its monitoring results for comparison testing, which can be used to determine whether the monitoring function of the distortion correction module meets the requirements;

[0016] 3. This invention enables one-click printing of pre-distortion performance analysis results and monitoring information comparison test results, providing a convenient and reliable method for testing the pre-distortion correction performance of head-up displays and improving testing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the components of the head-up display pre-distortion correction performance testing device of the present invention.

[0018] Figure 2 This is a cross-linking diagram of the head-up display pre-distortion correction performance testing device of the present invention. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] This device analyzes the functional requirements of the head-up display distortion correction module, designs a pre-distortion correction performance testing function, and tests its internal monitoring function to quickly and accurately detect whether the distortion correction module meets the requirements of the head-up display system.

[0021] The purpose of this invention is to provide a head-up display (HUD) pre-distortion correction performance testing device to solve the problem of difficulty in testing the function of HUD distortion correction modules in the prior art.

[0022] A head-up display pre-distortion correction performance testing device includes pre-distortion correction performance measurement and control software, distortion correction module testing components, and the distortion correction module under test.

[0023] The pre-distortion correction performance measurement and control software is built into the measurement and control host computer. It provides the function of calculating the point-by-point position error between the theoretical distortion data of the excitation image and the video data output by the distortion correction module under test. It can also provide distortion performance analysis, complete the data source excitation control of the DVI video of the distortion correction module test component, realize the acquisition of DVI video data after pre-distortion processing, provide DVI video with timestamps and symbol markers to the distortion correction module under test and collect its monitoring results for comparison testing, integrate and store the test results, and realize one-click printout output.

[0024] The distortion correction module test component can provide the power and excitation data required for the distortion correction module under test to work, collect and display the output of the distortion correction module under test, and verify the function and performance of the distortion correction module under test, including distortion and monitoring.

[0025] The distortion correction module test component incorporates a test excitation circuit board based on FPGA+ARM. This circuit board can automatically generate excitation video signals with timestamps and markers, and receive monitoring and processing results from the distortion correction module under test, reporting them to the pre-distortion correction performance measurement and control software. The test excitation circuit board receives image data from the pre-distortion correction performance measurement and control software, generates a DVI excitation video signal, and sends it to the distortion correction module under test. The distortion correction module under test performs pre-distortion and anti-aliasing processing on the input DVI excitation video signal, then outputs an RGB video signal to the test excitation circuit board. The test excitation circuit board converts the RGB video signal into a DVI video signal. The DVI video signal is driven by the test excitation circuit board to output four DVI channels. One DVI channel is sent to a DVI video acquisition unit, and the acquired video is transmitted to the measurement and control host computer. The pre-distortion correction performance measurement and control software performs pixel-by-pixel analysis and comparison of the images before and after distortion correction, and then sends the DVI signals to a monitor for display. Specific implementation examples:

[0027] This invention relates to a head-up display pre-distortion correction performance testing device, comprising: pre-distortion correction performance measurement and control software, distortion correction module testing components, and distortion correction module.

[0028] The testing device has a DVI video signal output function, providing DVI video excitation for the module's input, and the output interface includes a module-specific connector and a standard commercial DVI interface.

[0029] The testing device has video timing conversion and storage display functions, which converts the RGB timing video data output by the distortion correction module under test into DVI video output that meets the standard VESA timing requirements, so that the video can be displayed on the monitor.

[0030] The detection device has a discrete signal testing function, provides discrete input excitation data required for the operation of the configurable distortion correction module, and collects discrete signals output by the distortion correction module, while also providing discrete status indication function.

[0031] The detection device has a distortion performance analysis function, which provides the function of calculating the point-by-point position error between the theoretical distortion data of the excitation image and the video data output by the distortion correction module under test, and can provide distortion performance analysis.

[0032] The testing device has monitoring and testing functions, provides DVI video with timestamps and symbol markers, collects the comparison results output by the distortion correction module, and provides result prompts.

[0033] The testing device has a one-click test report printing function: it provides a one-click testing function for modules and generates a test report.

[0034] The testing device uses a portable trolley safety case to realize a mobile testing platform, realizes multiple types of digital video acquisition functions, integrates a test excitation circuit board based on FPGA+ARM to realize configurable discrete input / output, multiple types of static and dynamic digital video output, video timing conversion and other functions, provides an independent test panel for easy test cable connection, is equipped with a separate high-definition monitor for video monitoring, and integrates dual-output DC power supply to power the distortion correction module under test.

[0035] A laptop computer was selected as the portable host computer for the distortion correction module test unit. It was equipped with pre-distortion correction performance measurement and control software, whose main functions are divided into three parts: video acquisition and analysis, discrete I / O testing, and data storage and management. Video acquisition and analysis completes functions such as video acquisition, storage, playback, distortion analysis, and monitoring result analysis. Discrete I / O testing completes the configuration and testing of discrete input and output interfaces. Data storage and management is mainly used for storing and managing video data and test data, using keywords such as filename, collector, acquisition time, and video analysis data, and employing an ACCESS database for management.

[0036] The pre-distortion correction performance monitoring software allows for video resolution configuration and supports multiple video source types such as DVI and HDMI. It provides DVI video with timestamps and symbol markers to the distortion correction module and collects its monitoring results for comparison testing. It can display the original and distorted video reported by the distortion correction module in real time in the corresponding video display area and can store the currently acquired video to a video file. Video storage is based on OpenCV and supports dynamic compression ratio storage. When acquiring 14-bit video, a high-compression AVI format file can be selected for storage, and playback of the stored video is supported.

[0037] The distortion correction module test assembly features a portable design with a trolley chassis, enabling a mobile test platform. The test assembly includes a test excitation circuit board, a PCI-E expansion dock video capture unit, a 28V dual-channel DC power supply, and a portable chassis.

[0038] The test component incorporates a test excitation circuit board based on FPGA+ARM architecture. The circuit board receives image data from the host computer software, generates a DVI excitation video signal, and sends it to the distortion correction module under test (DUT) and simultaneously to the DVI video capture card. The DUT pre-distorts the input DVI video signal and outputs an RGB video signal to the test excitation circuit board, which converts the RGB video signal into a DVI video signal. This DVI signal can be driven by the circuit board to output multiple DVI video signals. One DVI signal is sent to the integrated PCI-E expansion dock DVI video capture unit within the chassis, acquiring video and transmitting it to the host computer. The test software then performs pixel-by-pixel analysis and comparison of the images before and after distortion correction. Another DVI signal is sent to a monitor for display. The circuit board can automatically generate excitation video signals with timestamps and markers. The circuit board provides 10 configurable input and 10 output discrete I / O ports for testing discrete quantities of the DUT.

[0039] The video capture device is in the form of a PCI-E expansion dock with a built-in DVI video capture card, and the expansion dock has a built-in Thunderbolt. TM The system includes a 3 (Thunderbolt 3) to PCI-E protocol conversion circuit board, cooling fan, power supply, etc., and the video capture unit is integrated inside the distortion correction module test unit chassis.

[0040] The test board provides 20 configurable DIOs, which connect to the microcontroller via a buffer IC. Each DIO can be independently configured as an input or output mode, with a voltage level standard of 3.3V LVCMOS. Among them, D10-DI9 are 10 digital inputs, and DO0-DO9 are 10 digital outputs.

[0041] The 28V dual-channel DC power supply uses AC-DC converter to convert the input AC mains power to an intermediate voltage of approximately 32V, which is then input to the Buck chopper DC-DC converter. A voltage sampling circuit proportionally detects the input voltage and feeds it back to the control circuit. The control circuit compares the voltage sampling signal with the set voltage value, provides an error signal, and controls the chopper's duty cycle to stabilize the output voltage at the set value. A current detection circuit monitors the load current. When the load current exceeds the set value, the control circuit reduces the duty cycle, lowering the output voltage to prevent the output current from exceeding the set current. In this mode, the regulated power supply operates in constant current mode. The device panel features an independent power switch and a digital display showing the voltage and current values.

[0042] The distortion correction module test component chassis features a portable, trolley-mounted safety case design. The chassis integrates an independent test panel, providing discrete input / output interfaces and corresponding status indicators. It also offers a DVI input / output interface to adapt to the excitation data requirements of different modules. The chassis's flip-top cover integrates a 7-inch LUT7S monitor, supporting video monitoring in 720P, 1080I, and 1080P formats.

Claims

1. A head-up display pre-distortion correction performance testing device, characterized in that, This includes pre-distortion correction performance measurement and control software, distortion correction module test components, and the distortion correction module under test; The pre-distortion correction performance measurement and control software is built into the measurement and control host computer. It provides the function of calculating the point-by-point position error between the theoretical distortion data of the excitation image and the video data output by the distortion correction module under test. It can also provide distortion performance analysis, complete the data source excitation control of the DVI video of the distortion correction module test component, realize the acquisition of DVI video data after pre-distortion processing, provide DVI video with timestamps and symbol markers to the distortion correction module under test and collect its monitoring results for comparison testing, integrate and store the test results, and realize one-click printout output. The distortion correction module test component can provide the power and excitation data required for the distortion correction module under test to work, collect and display the output of the distortion correction module under test, and verify the function and performance of the distortion correction module under test, including distortion and monitoring. The distortion correction module test component incorporates a test excitation circuit board based on FPGA+ARM. This circuit board can automatically generate excitation video signals with timestamps and markers, and receive monitoring and processing results from the distortion correction module under test, reporting them to the pre-distortion correction performance measurement and control software. The test excitation circuit board receives image data from the pre-distortion correction performance measurement and control software, generates a DVI excitation video signal, and sends it to the distortion correction module under test. The distortion correction module under test performs pre-distortion and anti-aliasing processing on the input DVI excitation video signal, then outputs an RGB video signal to the test excitation circuit board. The test excitation circuit board converts the RGB video signal into a DVI video signal. The DVI video signal is driven by the test excitation circuit board to output four DVI channels. One DVI channel is sent to a DVI video acquisition unit, and the acquired video is transmitted to the measurement and control host computer. The pre-distortion correction performance measurement and control software performs pixel-by-pixel analysis and comparison of the images before and after distortion correction, and then sends the DVI signals to a monitor for display.

2. The head-up display pre-distortion correction performance testing device according to claim 1, characterized in that, The video capture device is a PCI-E expansion dock with a built-in DVI video capture card, which is installed independently inside the chassis.

3. The head-up display pre-distortion correction performance testing device according to claim 1, characterized in that, The distortion correction module test component is designed to be portable, making it easy for testers to carry. This component can be used independently.

4. The head-up display pre-distortion correction performance testing device according to claim 1, characterized in that, The test excitation circuit board provides 10 configurable input and 10 output discrete I / Os for testing discrete quantities of the module under test.

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