Apparatus for measuring the delay difference between the turn signal in the screen of the car and the physical turn signal
By designing a measurement device that includes a support platform, a high-speed camera, and an image data processing host, the problem of measuring the delay difference between the in-screen turn signal and the physical turn signal on an actual vehicle was solved, achieving efficient and accurate testing and shortening the vehicle infotainment system development cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN CLOUD PINE TECH CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-08-04
AI Technical Summary
In existing technologies, measuring the delay difference between the turn signals displayed on the vehicle's infotainment screen and the physical turn signals requires testing on actual vehicles, resulting in high testing costs and impacting the development cycle.
Design a measurement device including a support platform, a high-speed camera, simulated vehicle lights, and an image data processing host. The device controls the simulated vehicle lights by simulating a vehicle switch and captures changes on the vehicle's screen using the high-speed camera. The image data processing host analyzes the changes in image brightness to obtain the time delay difference.
It enables rapid and accurate measurement of the delay difference between the in-screen turn signal and the physical turn signal in non-vehicle environments, improving testing efficiency and shortening the R&D cycle of the vehicle system.
Smart Images
Figure CN224594193U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of instrument testing technology, specifically to a device for measuring the delay difference between the turn signal in the vehicle's infotainment screen and the physical turn signal. Background Technology
[0002] Vehicle turn signals refer to left and right turn signals, hazard lights, and emergency braking hazard lights, etc. There are in-screen turn signals installed in the instrument panel to indicate vehicle turn signals, and physical turn signals are installed on the outside of the vehicle. Physical turn signals are directly connected to physical turn switches and power supply via wires, and can respond immediately after the physical turn switches are connected. In-screen turn signals require signal transmission and are implemented by software in the vehicle system, which has a certain time delay. The time difference between the two is ≤100ms, which is considered qualified.
[0003] Currently, measuring the error between the in-screen turn signals and the physical turn signals usually requires installing the vehicle-mounted system on a real vehicle or connecting it to the headlights on a test bench for testing. However, due to the large number of different vehicle models, instrument panels, and headlight specifications, using actual vehicle headlights for all vehicle-mounted system tests would significantly increase testing costs. Furthermore, the development and production cycles of vehicle-mounted systems and headlights differ, with vehicle-mounted systems having longer development and testing cycles. Testing each vehicle-mounted system and headlight in a one-to-one correspondence would impact the production and development cycle. Utility Model Content
[0004] Based on the above description, this utility model provides a device for measuring the delay difference between the turn signal inside the vehicle infotainment screen and the physical turn signal, so as to improve the testing efficiency of the vehicle infotainment system and shorten the development cycle of the vehicle infotainment system.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for measuring the delay difference between the turn signal in the vehicle's infotainment screen and the physical turn signal, comprising a support platform and a vehicle infotainment system mounted on the support platform.
[0006] A high-speed camera is installed on the side of the support platform closer to the vehicle screen, and simulated vehicle lights are installed on the side of the support platform farther from the vehicle screen.
[0007] The vehicle-mounted unit is physically connected to the simulated vehicle lights, and the high-speed camera sends data to the image data processing host.
[0008] Through the above technical solution, the physical switch is used to simulate the headlight switch in a vehicle. The physical switch can control the operation of the simulated headlights and send control signals to the vehicle's infotainment system. The high-speed camera is used to capture the changes on the screen of the vehicle's infotainment system and the process of simulating the changes in the headlights. The image data processing host is used to analyze the changes in image brightness in the high-speed captured image data, and then obtain the delay difference between the turn signals on the screen and the physical turn signals.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Furthermore, a light shield is provided between the high-speed camera and the vehicle's infotainment system. A light-transmitting hole is provided on the light shield, and the position of the light-transmitting hole corresponds to the turn signal on the vehicle's infotainment system screen.
[0011] Furthermore, a second light-transmitting hole is provided on the light-shielding plate, and the position of the second light-transmitting hole corresponds to that of the simulated vehicle headlight.
[0012] Through the above technical solution, the light-transmitting holes one and two on the light shield are used to allow the light from the turn signals and simulated headlights in the vehicle screen to pass through. The light shield is used to block interference from light other than the turn signals and simulated headlights in the screen, so as to reduce the amount of data processed by the image data processing host.
[0013] Furthermore, a dark box is provided on the support platform, and the high-speed camera, vehicle head unit, and simulated vehicle lights are all installed in the dark box.
[0014] Through the above technical solution, the dark box is used to block light other than the vehicle screen and simulated vehicle lights, avoiding interference from external light; when the turn signals and simulated vehicle lights are on inside the screen, a high contrast is formed with the surrounding environment, so that the image data processing host can better identify them, and improve the accuracy of identifying whether the turn signals and simulated vehicle lights inside the screen are on.
[0015] Furthermore, an opening is provided on one side of the dark box, and a sealing door for closing the opening is connected to the side wall of the dark box;
[0016] The vehicle infotainment system and simulated headlights can be removed from the opening.
[0017] With the above technical solution, when it is necessary to test other vehicle systems, the vehicle system and simulated vehicle lights can be removed through the opening; so as to replace the vehicle system and the matching simulated vehicle lights that need to be tested.
[0018] Furthermore, a sliding guide rail is fixedly installed on the support platform. The sliding guide rail extends from the opening, and a sliding block is slidably fitted on the sliding guide rail. A mounting bracket is detachably connected to the sliding block.
[0019] The mounting bracket is provided with a placement slot for placing the vehicle machine. Buffer layers are provided on both sides of the placement slot. The mounting bracket is provided with a drive component for moving the buffer layers.
[0020] One side of the mounting bracket is provided with an arc-shaped clamp for holding the light-shielding plate.
[0021] Through the above technical solution, the arc-shaped clamp is used to hold the sunshade on the mounting frame. When testing the vehicle machine, the matching sunshade is inserted into the arc-shaped clamp. An opening is formed between the top of the arc-shaped clamp and the mounting frame, and the sunshade can be inserted between the arc-shaped clamp and the mounting frame through the opening.
[0022] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0023] Simulated headlights are used to simulate the operating state of real headlights. In conjunction with a high-speed camera, the operating state of the lights on the screen and the simulated headlights is captured. Then, the brightness of the captured video is analyzed frame by frame to quickly obtain the delay difference between the lights on the in-vehicle screen and the simulated headlights, that is, the delay difference between the lights on the screen and the physical turn signals. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the internal side of a device for measuring the delay difference between the turn signal inside the vehicle's infotainment screen and the physical turn signal, provided in Embodiment 1 of this utility model.
[0025] Figure 2 An internal top view of a device for measuring the delay difference between the turn signal inside the vehicle's infotainment screen and the physical turn signal, provided in Embodiment 1 of this utility model;
[0026] Figure 3 This is a schematic diagram of an overall device for measuring the delay difference between the turn signal in the vehicle infotainment screen and the physical turn signal, provided in Embodiment 1 of this utility model.
[0027] Figure 4 A schematic diagram of a light shield for a device for measuring the delay difference between the turn signal inside the vehicle's infotainment screen and the physical turn signal, provided in Embodiment 1 of this utility model;
[0028] Figure 5 This is a three-dimensional schematic diagram of the internal structure of a device for measuring the delay difference between the turn signal inside the vehicle's infotainment screen and the physical turn signal, provided in Embodiment 1 of this utility model.
[0029] Figure 6 A schematic diagram showing the open state of the closed door of a device for measuring the delay difference between the turn signal inside the vehicle's infotainment screen and the physical turn signal, provided in Embodiment 1 of this utility model;
[0030] Figure 7 for Figure 1 Enlarged schematic diagram of part A;
[0031] Figure 8 This is a flowchart illustrating a method for measuring the delay difference between the turn signal in the vehicle's infotainment screen and the physical turn signal, as provided in Embodiment 2 of this utility model.
[0032] Figure label:
[0033] 1. Support platform; 2. Vehicle-mounted unit; 3. High-speed camera; 4. Simulated vehicle lights; 5. Physical switch; 6. Image data processing host;
[0034] 7. Light-shielding plate; 71. Light-transmitting hole one;
[0035] 8. Dark box; 81. Closed door;
[0036] 9. Sliding guide rail; 91. Sliding block; 92. Mounting bracket; 93. Placement slot; 94. Buffer layer; 95. Drive assembly; 96. Arc-shaped clamp;
[0037] 10. Masking. Detailed Implementation
[0038] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0040] Example 1:
[0041] refer to Figures 1-3 A device for measuring the delay difference between the turn signal displayed on a vehicle's infotainment screen and the physical turn signal includes a support platform 1 and a vehicle infotainment system 2 mounted on the support platform 1. A dark box 8 is fixedly connected to the support platform 1, and the vehicle infotainment system 2 is placed in the dark box 8. A high-speed camera 3 is placed in the dark box 8 and is positioned in front of the screen of the vehicle infotainment system 2. A simulated vehicle light 4 is also provided in the dark box 8. The simulated vehicle light 4 is detachably connected to the support platform 1 and is located on the side away from the screen of the vehicle infotainment system 2. When the high-speed camera 3 is shooting, it ensures that the vehicle infotainment system 2 does not obstruct the simulated vehicle light 4.
[0042] refer to Figures 1-3 A device for measuring the delay difference between the turn signal in the vehicle's infotainment screen and the physical turn signal, and also includes an image data processing host 6, wherein the high-speed camera 3 sends the captured image data to the image data processing host 6.
[0043] refer to Figures 1-3 Both the vehicle infotainment system 2 and the simulated vehicle lights 4 are coupled to a physical switch 5. The physical switch 5 is the same as the control switch on the vehicle and is used to control the changes in the simulated vehicle lights 4, while sending control signals to the vehicle infotainment system 2.
[0044] refer to Figures 4-5 A light shield 7 is detachably installed between the high-speed camera 3 and the vehicle unit 2. The light shield 7 has a light-transmitting hole 1 71 and a light-transmitting hole 2 (not shown in the figure). The position of the light-transmitting hole 1 71 corresponds to the turn signal in the screen of the vehicle unit 2, and the position of the light-transmitting hole 2 corresponds to the position of the simulated vehicle light 4.
[0045] refer to Figures 5-7 An opening is provided on one side of the dark box 8. A closing door 81 for closing the opening is connected to the side wall of the dark box 8. A sliding guide rail 9 is fixedly installed on the support platform 1. The sliding guide rail 9 extends from the opening. A sliding block 91 is slidably fitted on the sliding guide rail 9. A mounting bracket 92 is connected to the sliding block 91 by bolts.
[0046] The mounting bracket 92 has a placement slot 93 for placing the vehicle-mounted unit 2. Buffer layers 94 are provided on both sides of the placement slot 93. One buffer layer 94 is adhered to the inner side of the placement slot 93 with adhesive. The other buffer layer 94 is driven by a drive assembly 95 mounted on the mounting bracket 92. The drive assembly 95 includes a drive screw and a drive handle. The drive screw rotates in conjunction with the buffer layer 94. The drive screw is threaded into the mounting bracket 92. Rotating the drive handle moves the drive screw, thereby driving the buffer layer 94 to clamp the vehicle-mounted unit 2 in the placement slot 93. The buffer layer 94 is used to prevent the outer side of the vehicle-mounted unit 2 from being damaged.
[0047] refer to Figure 6 and Figure 7 An arc-shaped clip 96 is provided on the side of the mounting bracket 92 facing the vehicle screen 2. The arc-shaped clip 96 is used to hold the light shield 7. The arc-shaped clip 96 abuts against the side wall of the mounting bracket 92, and an opening is formed between the upper end of the arc-shaped clip 96 and the mounting bracket 92. When installing the light shield 7, the light shield 7 is inserted from above the arc-shaped clip 96, and the arc-shaped clip 96 clamps the light shield 7 to the side of the mounting bracket 92.
[0048] refer to Figure 5 and Figure 6 The platform is supported by another sliding guide rail 9 connected by bolts. A sliding block 91 is fitted on the sliding guide rail 9. A mounting plate is bolted to the sliding block 91. A mounting groove is opened on the mounting plate, and a mounting light plate is inserted into the mounting groove. The simulated car light 4 is fixedly mounted on the mounting light plate. The two sliding guide rails 9 are arranged in parallel and both extend from the opening of the dark box 8.
[0049] Brief description of usage:
[0050] 1. When testing vehicle infotainment system 2, first slide the mounting plate to the outside of the dark box 8;
[0051] 2. Next, fix the vehicle unit 2 and the corresponding sunshade 7 onto the mounting bracket 92, and connect the vehicle unit 2, the simulated vehicle light 4 and the physical switch 5 together;
[0052] 3. Then push the mounting bracket 92 back into the dark box 8;
[0053] 4. High-speed camera 3 is powered on and begins recording;
[0054] 5. The operating mode of the vehicle lights can be changed regularly by using physical switch 5.
[0055] Example 2
[0056] refer to Figure 8 A method for measuring the delay difference between the turn signal displayed on the vehicle's infotainment screen and the physical turn signal includes the following steps:
[0057] S101. After the vehicle's infotainment system is powered on, the high-speed camera is started. After the high-speed camera starts recording for 5-10 seconds, the operation mode of the turn signals is controlled by the physical switch of the turn signals. The operation modes are: left turn signal on, right turn signal on, and brief flashing.
[0058] S102. Each operating mode is maintained for 10s-20s, and the interval between switching operating modes is 10s-20s.
[0059] S103, The high-speed camera sends video data to the video analysis module;
[0060] S104. The video analysis module first extracts frames from the video, extracting key frames at 50 frames per second.
[0061] S105. The video analysis module reads the brightness of key frames located in the on-screen lights and simulated vehicle lights areas along the timeline.
[0062] When the first keyframe showing an increase in brightness in the first on-screen light area is read, record time T101; when the first keyframe showing an increase in brightness in the first simulated light area is read, record time T102.
[0063] When the keyframe showing the increase in brightness in the second on-screen light area is read, record time T201; when the keyframe showing the increase in brightness in the second analog light area is read, record time T202.
[0064] ······
[0065] When the keyframe showing an increase in brightness in the nth on-screen light area is read, record time Tn01; when the keyframe showing an increase in brightness in the nth simulated light area is read, record time Tn02.
[0066] S106. Calculate the delay error: the first delay error T1 = T102 - T101, the second delay error T2 = T202 - T201, ..., the nth delay error Tn = Tn02 - Tn01;
[0067] S107. Set the error benchmark as T0, compare T1, T2, ..., Tn with T0. If it is greater than T0, it is unqualified; if it is less than T0, it is qualified.
[0068] Preferably, the vehicle-mounted unit under test is marked with a unique identification code, which is a QR code; the video analysis module stores a table corresponding to the identification code and the device parameters, including the size of the vehicle-mounted unit and the position, shape and size of the lights in the screen. The video analysis module generates a mask based on the device parameters. The mask is provided with light-transmitting holes corresponding to the positions of the lights in the screen and the simulated vehicle lights. When the lights in the screen and the simulated vehicle lights are lit, the emitted light can be transmitted through the light-transmitting holes.
[0069] When shooting with a high-speed camera, the light shield described in Example 1 can be omitted. After shooting, the video analysis module adds a mask to the video to block the area of the video except for the lights inside the screen and the simulated car lights, so as to reduce the processing pressure of the video analysis module on the video data.
[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for measuring the delay difference between the turn signal displayed on a vehicle infotainment screen and the physical turn signal, comprising a support platform and a vehicle infotainment system mounted on the support platform, characterized in that, A high-speed camera is installed on the side of the support platform closer to the vehicle screen, and simulated vehicle lights are installed on the side of the support platform farther from the vehicle screen. The vehicle-mounted unit is physically connected to the simulated vehicle lights, and the high-speed camera sends data to the image data processing host. A light shield is provided between the high-speed camera and the vehicle unit. A light-transmitting hole is provided on the light shield. The position of the light-transmitting hole corresponds to the turn signal in the vehicle unit screen. The light-transmitting plate has a second light-transmitting hole, the position of which corresponds to the simulated vehicle headlight.
2. The device for measuring the delay difference between the turn signal displayed on the vehicle infotainment screen and the physical turn signal according to claim 1, characterized in that, The support platform is equipped with a dark box, in which the high-speed camera, vehicle-mounted unit, and simulated vehicle lights are all housed.
3. The device for measuring the delay difference between the turn signal in the vehicle infotainment screen and the physical turn signal according to claim 2, characterized in that, The dark box has an opening on one side, and the side wall of the dark box is connected to a sealing door for closing the opening; The vehicle infotainment system and simulated headlights can be removed from the opening.
4. The device for measuring the delay difference between the turn signal in the vehicle infotainment screen and the physical turn signal according to claim 3, characterized in that, A sliding guide rail is fixedly installed on the support platform. The sliding guide rail extends from the opening. A sliding block is slidably fitted on the sliding guide rail. A mounting bracket is detachably connected to the sliding block. The mounting bracket is provided with a placement slot for placing the vehicle machine. Buffer layers are provided on both sides of the placement slot. The mounting bracket is provided with a drive component for moving the buffer layers. One side of the mounting bracket is provided with an arc-shaped clamp for holding the light-shielding plate.