Head-up display test system and method

Abstract

The invention provides a head-up display test system and method. The system comprises a windshield and a positioning tool thereof, a mechanical arm, a control host, a camera, a brightness colorimeter and a test host. The control host is used for controlling the mechanical arm to adjust the to-be-tested head-up display, the camera and the brightness colorimeter to specified positions and / or angles according to the positioning information; the camera is used for collecting an imaged test image projected on the windshield by the head-up display; the brightness and chromaticity meter is used for measuring brightness and chromaticity related data of imaging; the test host is used for sending positioning information to the control host; sending the to-be-displayed image to the to-be-detected head-up display Comparing the test image with a pre-stored standard image to obtain an imaging parameter value, and generating an imaging test result; generating a brightness and chrominance test result according to the brightness and chrominance related data; and generating a test report according to the imaging test result and the brightness and chrominance test result. According to the invention, automatic testing of head-up display is realized.

Description

Technical Field

[0001] Embodiments of the present invention generally relate to the technical field of vehicle head-up display, and more specifically, to a head-up display testing system and method. Background Art

[0002] With the development of smart cockpits, the installation rate of head-up displays (HUDs) has increased year by year. How to evaluate and test the image quality / performance of head-up displays is a problem facing vehicle manufacturers. Therefore, a head-up display test system is urgently needed.

[0003] At present, the domestic head-up display related tests are mainly aimed at optical and backlight tests when the head-up display production line is off the line. There are few test equipment used in the parts development and approval process, and the degree of automation is not high. The range of test parameters is also limited and non-standard. Summary of the invention

[0004] In order to solve the above-mentioned problems in the prior art, in the first aspect, an embodiment of the present invention provides a head-up display test system, the system comprising: a windshield and its positioning tooling, a robotic arm, a control host, a camera, a brightness colorimeter and a test host. The test host is communicatively connected to the head-up display to be tested, the control host, the camera and the brightness colorimeter. The control host is communicatively connected to the robotic arm. The control host is used to control the robotic arm to adjust the head-up display to be tested, the camera and the brightness colorimeter to the position and / or angle specified in the positioning information related to the head-up display to be tested, the camera and the brightness colorimeter received from the test host. The camera is used to collect a test image of the imaging projected by the head-up display on the windshield. The brightness colorimeter is used to measure the brightness and chromaticity related data of the imaging projected by the head-up display on the windshield. The test host is used to: send the positioning information to the control host; send the image to be displayed to the head-up display to be tested; receive the test image from the camera; receive the brightness and chromaticity related data from the brightness and colorimeter; compare the test image with a pre-stored standard image to obtain imaging parameter values ​​and generate imaging test results; generate brightness and chromaticity test results based on the brightness and chromaticity related data; and generate a test report based on the imaging test results and the brightness and chromaticity test results.

[0005] In some embodiments, the test host is also used to send a controller local area network function interface test simulation message associated with the vehicle function to the head-up display to be tested, receive a function interface test image of the head-up display projected by the camera captured by the camera, generate a function test result based on the function interface test image, and store the function test result in the test report.

[0006] In some embodiments, the imaging parameters include one or more of the following: rotation, offset, ghosting, keystone deformation, linear deformation, imaging size, and imaging aspect ratio.

[0007] In some implementations, the test host is further configured to: execute continuous automatic measurement within the eye box in response to an automatic test instruction received from the human-machine interface.

[0008] In some embodiments, the system further includes a programmable power supply, which is communicatively connected to the test host and is used as a power supply for the head-up display to be tested; the test host is further used to: control a switch and / or voltage of the programmable power supply.

[0009] In a second aspect, an embodiment of the present invention proposes a head-up display test method, the method comprising: sending positioning information related to the head-up display to be tested, the camera and the brightness colorimeter by the test host to the control host; the control host controlling the mechanical arm to adjust the head-up display to be tested, the camera and the brightness colorimeter to the position and / or angle specified in the positioning information according to the positioning information received from the test host; the test host sending the image to be displayed to the head-up display to be tested; the camera collecting the imaging test image of the head-up display projected on the windshield; the brightness colorimeter measuring the brightness and chromaticity related data of the imaging of the head-up display projected on the windshield; the test host receiving the test image from the camera; receiving the brightness and chromaticity related data from the brightness colorimeter; comparing the test image with a pre-stored standard image to obtain imaging parameter values ​​and generate imaging test results; generating brightness and chromaticity test results according to the brightness and chromaticity related data; generating a test report according to the imaging test results and the brightness and chromaticity test results.

[0010] In some embodiments, the method also includes: the test host sending a controller local area network function interface test simulation message associated with the vehicle function to the head-up display to be tested; the test host receiving from the camera a function interface test image of the head-up display projected by the camera, generating a function test result based on the function interface test image, and storing the function test result in the test report.

[0011] In some embodiments, the method further includes: setting a calibration plate at a specified position relative to the windshield; sending a calibration image to the head-up display to be tested by the test host; and calibrating the position of the head-up display to be tested by comparing the image projected onto the calibration plate by the head-up display to be tested with the pattern on the calibration plate.

[0012] In some implementations, the method further includes: the test host executing continuous automatic measurement within the eye box in response to an automatic test instruction received from a human-machine interface.

[0013] In some embodiments, the method further includes: the test host sending a controller area network part information read message to the head-up display under test; the test host receiving a part information message from the head-up display under test; and the test host placing the part information message into the test report.

[0014] The head-up display test system and method proposed in the embodiments of the present invention realizes the automated test of the head-up display, which can test optical parameters, backlight parameters, and functional tests. During the test, the camera position can be automatically adjusted, the head-up display of the sample to be tested can be automatically adjusted, the parameters can be configured, and the test can be automatically tested with one button, and the test results and visual test reports can be generated.

[0015] The head-up display test system and method proposed in the embodiments of the present invention can perform digital display and operation, which is very user-friendly; the digital display and operation interface can be personalized and upgraded according to the needs of the end user. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0017] Figure 1 A schematic diagram of the architecture of a head-up display test system according to an embodiment of the present invention is shown;

[0018] Figure 2 A flow chart of a head-up display testing method according to an embodiment of the present invention is shown.

[0019] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts. DETAILED DESCRIPTION

[0020] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way.

[0021] In one aspect, an embodiment of the present invention provides a head-up display test system, which includes: a windshield and its positioning tooling, a robotic arm, a control host, a camera, a brightness colorimeter, and a test host.

[0022] The windshield and its positioning fixture are used to simulate the windshield on a real vehicle.

[0023] The test host is communicatively connected to the head up display (HUD) to be tested, the control host, the camera and the brightness colorimeter. For example, the communicatively connected can be achieved through Ethernet communication. A minimized controller area network (CAN) communication network can be established in the test system, which is used to ensure the normal operation of the head up display and display the test pictures required for each optical test parameter. Optionally, the above communication can be achieved through a switch.

[0024] The test host may have a human-machine interface (or human-machine interaction interface, human-machine interface), such as a display, for displaying data or images and receiving operation instructions from testers.

[0025] The control host is communicatively connected to the robotic arm. The control host can also be an industrial computer or a programmable logic controller (PLC) to control the robotic arm and automatically adjust the head-up display and industrial camera to the correct position of the vehicle to be tested. Usually, the control host is installed with software to control the robotic arm. The control host can include hardware equipment such as an electric control box and an operating cabinet, which together constitute the automatic control system of the robotic arm.

[0026] Optionally, a safety fence may be provided around the system to prevent personnel from entering during testing and to prevent the robotic arm from colliding with personnel or other objects.

[0027] The control host is used to control the robotic arm to adjust the head-up display, camera and brightness colorimeter to be tested to the position and / or angle specified in the positioning information related to the head-up display, camera and brightness colorimeter to be tested received from the test host.

[0028] The camera is used to collect a test image of the head-up display projected on the windshield. The camera can be, for example, an industrial camera.

[0029] The brightness and colorimeter is used to measure the brightness and colorimetry related data of the image projected on the windshield by the head-up display, for example, the data may include brightness, color, contrast and the like.

[0030] The test host is used to: send positioning information to the control host; send the image to be displayed to the head-up display to be tested; receive the test image from the camera; receive the brightness and chromaticity related data from the brightness and colorimeter; compare the test image with the pre-stored standard image to obtain the imaging parameter value and generate the imaging test result; generate the brightness and chromaticity test result according to the brightness and chromaticity related data; generate the test report according to the imaging test result and the brightness and chromaticity test result. For example, the test host can be programmed with C# application software to complete the writing of automatic test scripts, and the test items, eye points, head-up display positions, etc. can be freely configured.

[0031] As an example, the function of setting the position of the HUD in the positioning information can realize the control of the following signals: X-axis movement distance, X-axis rotation angle, Y-axis movement distance, Y-axis rotation angle, Z-axis movement distance, and Z-axis rotation angle.

[0032] The position of the camera and photometer is set to simulate the position of the human eye in the vehicle, that is, the eye box. The eye box refers to the range in which the driver's eyes can see a clear virtual image. The eye box position is set according to the coordinates of the entire vehicle, and the coordinates of the eye box may be different for each model.

[0033] As an example, the function of setting the position of the camera and the photometric colorimeter in the positioning information can realize the control of the following signals: X-axis movement distance, X-axis rotation angle, Y-axis movement distance, Y-axis rotation angle, Z-axis movement distance, and Z-axis rotation angle.

[0034] Optionally, the test host may save the last set positioning information.

[0035] For example, the test host can call the image to be displayed through a reserved diagnostic information interface.

[0036] For example, the test image can be compared with the standard image in the database according to a preset algorithm to obtain the value of the parameter to be tested, and then judged based on the test standard, and finally the test result is output to form a test report.

[0037] As an embodiment of the present invention, the imaging parameters include one or more of the following: rotation, offset, ghosting, trapezoidal deformation, linear deformation, imaging size, and imaging aspect ratio.

[0038] As an embodiment of the present invention, the test host is also used to send a CAN function interface test simulation message associated with the vehicle function to the head-up display to be tested, receive the function interface test image of the head-up display projected by the camera, generate a function test result according to the function interface test image, and store the function test result in a test report. In the test software, the whole vehicle communication situation is simulated, and the simulated CAN message is sent to the HUD, so that the HUD can display the vehicle speed, navigation and other interfaces, and can perform partial function diagnosis on the HUD.

[0039] As an example, the functional interfaces to be tested may include one or more of the following: a vehicle basic information interface, an ACC lane information interface, a navigation function interface, and the like.

[0040] Manual testing and automatic testing can be implemented in the test software running in the test host. In the manual test mode, the tester can manually select the measurement items in the test software and perform the measurement.

[0041] As an embodiment of the present invention, in the automatic test mode, the test host is further used to: execute continuous automatic measurement within the eye box range in response to an automatic test instruction received from the human-machine interface.

[0042] As an embodiment of the present invention, the system further includes a programmable power supply, which is communicatively connected to the test host and is used as a power supply for the head-up display to be tested. The test host is also used to: control the switch and / or voltage of the programmable power supply. Thus, the test host can control the power supply of the HUD through software. Optionally, the configuration information of the last programmable power supply can be saved in the test host.

[0043] In another aspect, the present invention provides a head-up display testing method. Figure 2 , which shows a flow chart of a head-up display test method 200 according to an embodiment of the present invention. The method 200 includes steps S201-S206.

[0044] In step S201, the testing host sends positioning information related to the head-up display, camera and brightness and colorimeter to be tested to the control host.

[0045] In step S202, the control host controls the robotic arm to adjust the head-up display, camera and brightness colorimeter to be tested to the position and / or angle specified in the positioning information according to the positioning information received from the test host.

[0046] In step S203, the test host sends the image to be displayed to the head-up display to be tested.

[0047] In step S204, a camera captures a test image of the head-up display projected onto the windshield.

[0048] In step S205, the brightness and colorimeter measures the brightness and colorimetry data of the image of the head-up display projected on the windshield.

[0049] In step S206, the test host receives a test image from the camera; receives brightness and chromaticity related data from the brightness and colorimeter; compares the test image with a pre-stored standard image to obtain imaging parameter values ​​and generate imaging test results; generates brightness and chromaticity test results based on the brightness and chromaticity related data; and generates a test report based on the imaging test results and the brightness and chromaticity test results.

[0050] As an embodiment of the present invention, the method may also include: the test host sends a CAN function interface test simulation message associated with the vehicle function to the head-up display to be tested; the test host receives a function interface test image of the head-up display projected by the camera captured by the camera, generates a function test result based on the function interface test image, and stores the function test result in a test report.

[0051] As an embodiment of the present invention, the method may further include: setting the calibration plate at a specified position relative to the windshield; sending the calibration image to the head-up display to be tested by the test host; calibrating the position of the head-up display to be tested by comparing the image projected onto the calibration plate by the head-up display to be tested with the pattern on the calibration plate. For example, a dot matrix may be set on the calibration plate, and the image to be displayed for calibration has the same dot matrix. When the dot matrix of the image projected onto the calibration plate by the HUD coincides with the dot matrix on the calibration plate, it indicates that the position of the HUD has been set.

[0052] As an embodiment of the present invention, the method may further include: the test host executes continuous automatic measurement within the eye box range in response to the automatic test instruction received from the human-machine interface.

[0053] As an embodiment of the present invention, the method may further include: the test host sends a controller area network part information reading message to the head-up display to be tested; the test host receives the part information message from the head-up display to be tested; and the test host puts the part information message into the test report. For example, in the test software, the configured diagnostic ID (DID) information can be obtained by CAN communication with the HUD, and converted into ASCII code for display. Through the diagnostic instructions, the basic information of the HUD can be read, that is, the status of each part, including part number, software version, hardware version, configuration of parts, opening or closing of each function, etc. This information can then be put into the test report. As a result, the status and configuration of the HUD to be tested can be intuitively displayed in the test report, and reading this information directly from the HUD can avoid erroneous information to the greatest extent.

[0054] The head-up display test system and method proposed in the embodiments of the present invention realizes the automated test of the head-up display, which can test optical parameters, backlight parameters, and functional tests. During the test, the camera position can be automatically adjusted, the head-up display of the sample to be tested can be automatically adjusted, the parameters can be configured, and the test can be automatically tested with one button, and the test results and visual test reports can be generated.

[0055] The head-up display test system and method proposed in the embodiments of the present invention can perform digital display and operation, which is very user-friendly; the digital display and operation interface can be personalized and upgraded according to the needs of the end user.

[0056] For the purpose of illustration, the foregoing description of the embodiments of the present invention has been given, which is not exhaustive nor intended to limit the present invention to the disclosed exact form. It will be appreciated by those skilled in the art that various changes can be made without departing from the scope of the present invention, and that the elements therein can be replaced with equivalents. In addition, without departing from the basic scope of the present invention, many modifications can be made so that specific situations or materials are adapted to the teachings of the present invention. Therefore, the present invention is not intended to be limited to the specific embodiments disclosed as the best mode for realizing the present invention, and the present invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A head-up display test system, characterized in that: The system includes: a windshield and its positioning tooling, a robotic arm, a control host, a camera, a brightness colorimeter and a test host. The test host is communicatively connected to the head-up display to be tested, the control host, the camera and the brightness and colorimeter; The control host is communicatively connected to the robotic arm; The control host is used to control the mechanical arm to adjust the head-up display to be tested, the camera and the brightness colorimeter to the position and / or angle specified in the positioning information related to the head-up display to be tested, the camera and the brightness colorimeter according to the positioning information received from the test host; The camera is used to collect a test image of the head-up display projected on the windshield; The brightness and colorimeter is used to measure brightness and color related data of the image projected by the head-up display on the windshield; The test host is used to: send the positioning information to the control host; send the image to be displayed to the head-up display to be tested; receive the test image from the camera; receive the brightness and chromaticity related data from the brightness and colorimeter; compare the test image with a pre-stored standard image to obtain imaging parameter values ​​and generate imaging test results; generate brightness and chromaticity test results based on the brightness and chromaticity related data; and generate a test report based on the imaging test results and the brightness and chromaticity test results.

2. The system according to claim 1, characterized in that The test host is also used to send a controller local area network function interface test simulation message associated with the vehicle function to the head-up display to be tested, receive a function interface test image of the head-up display projected by the camera captured by the camera, generate a function test result based on the function interface test image, and store the function test result in the test report.

3. The system according to claim 1 or 2, characterized in that: The imaging parameters include one or more of the following: rotation, offset, ghosting, trapezoidal deformation, linear deformation, imaging size, and imaging aspect ratio.

4. The system according to claim 1 or 2, characterized in that: The test host is also used to: execute continuous automatic measurement within the eye box range in response to an automatic test instruction received from the human-machine interface.

5. The system according to claim 1 or 2, characterized in that: The system further includes a programmable power supply, the programmable power supply being communicatively connected to the test host and being used as a power supply for the head-up display to be tested; The test host is also used to control the switch and / or voltage of the programmable power supply.

6. A head-up display testing method, characterized in that: The method comprises: The test host sends positioning information related to the head-up display, camera and brightness and colorimeter to be tested to the control host; The control host controls the mechanical arm to adjust the head-up display to be tested, the camera and the brightness and colorimeter to the position and / or angle specified in the positioning information according to the positioning information received from the test host; The test host sends the image to be displayed to the head-up display to be tested; The camera collects a test image of the head-up display projected on the windshield; The brightness and colorimeter measures brightness and colorimetry related data of the image of the head-up display projected on the windshield; The test host receives the test image from the camera; receives the brightness and chromaticity related data from the brightness and chromaticity meter; compares the test image with a pre-stored standard image to obtain imaging parameter values ​​and generate imaging test results; generates brightness and chromaticity test results based on the brightness and chromaticity related data; and generates a test report based on the imaging test results and the brightness and chromaticity test results.

7. The method according to claim 6, characterized in that The method further comprises: The test host sends a controller area network function interface test simulation message associated with a vehicle function to the head-up display to be tested; The test host receives the function interface test image of the head-up display projection captured by the camera from the camera, generates a function test result according to the function interface test image, and stores the function test result in the test report.

8. The method according to claim 6 or 7, characterized in that: The method further comprises: Setting the calibration plate at a specified position relative to the windshield; The test host sends a calibration image to the head-up display to be tested; The position of the head-up display to be tested is calibrated by comparing the image projected onto the calibration plate by the head-up display to be tested with the pattern on the calibration plate.

9. The method according to claim 6 or 7, characterized in that: The method further comprises: The test host executes continuous automatic measurement within the eye box range in response to the automatic test instruction received from the human-machine interface.

10. The method according to claim 6 or 7, characterized in that: The method further comprises: The test host sends a controller area network part information reading message to the head-up display to be tested; The test host receives a part information message from the head-up display to be tested; The test host puts the part information message into the test report.

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