Adjustable test bench for testing optical performance of HUDs

Abstract

The utility model relates to a kind of adjustable test bench for HUD optical performance test, including calibration plate adjusting device and universal HUD assembly fixture, calibration plate adjusting device includes X-axis adjusting support, Y-axis adjusting support, Z-axis adjusting support, pitch adjusting mechanism and calibration plate, X-axis adjusting support is connected with Y-axis adjusting support, Z-axis adjusting support is connected with X-axis adjusting support, pitch adjusting mechanism is fixed on Z-axis adjusting support, and is connected with calibration plate;Universal HUD assembly fixture includes bottom plate, quick release rod and universal ball head positioning block, quick release rod is fixed on bottom plate, and is connected with HUD assembly by universal ball head positioning block.Compared with prior art, the utility model improves the compatibility of HUD test bench, meets the needs of different test scenarios, solves the problem of cumbersome operation of traditional HUD test bench replacement HUD, improves test efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile electron test, especially a kind of adjustable test bench for HUD optical performance test. BACKGROUND

[0002] At present, as the key component of human-computer interaction, the optical performance test of automobile head-up display system (HUD) has become an important link in the whole vehicle development process, and the traditional HUD test bench is customized according to the position relationship of the calibration board, the virtual image formed by HUD on the windshield glass and the eyebox position. However, the traditional HUD test technology still has obvious limitations:

[0003] 1) In terms of equipment versatility, the current mainstream test scheme generally adopts the design architecture of special calibration board and fixture. Since the position relationship of the three is different for different types of HUD, the customized calibration board and HUD sample fixture cannot be adapted to other types of HUD samples. Specifically, the installation position, angle and fixing method of HUD of different vehicle types are significantly different, and the traditional test bench lacks the necessary adjustment freedom, which cannot realize rapid adaptation. For example, patent application CN112082739 discloses a kind of HUD stray light environment simulation test equipment and test method, which adopts fixed box structure, and arranges light source, windshield glass and camera in the box. The stray light distribution of HUD virtual image is collected by camera and analyzed. This method can only test single vehicle type HUD at fixed eyebox position, and cannot adapt to the differences of HUD installation position, angle and fixing method of different vehicle types. The test bench lacks adjustment freedom, and special fixture needs to be redesigned and manufactured every time the HUD type is changed. Each new vehicle type needs to be redesigned and manufactured with special test fixture, which increases the research and development cycle, and the test cost increases by about 30%-50%.

[0004] 2) In terms of test efficiency, the traditional test bench leads to slow test progress, high test cost and obvious operation problem. Due to the lack of rapid replacement mechanism, when replacing HUD samples of different vehicle types, test personnel often need to carry out complex fixture disassembly and reinstallation calibration work. This process needs to spend 2-3 hours of valuable test preparation time. This repetitive mechanical operation not only reduces the work efficiency, but also may introduce human error in the process of disassembly and reinstallation, which affects the reliability of test results. UTILITY MODEL CONTENT

[0005] The utility model discloses a purpose is to overcome the defects of above -mentioned prior art and provide a kind of adjustable test bench for HUD optical performance test, improve the compatibility of HUD test bench, meet the needs of different test scenes, solve the problem that traditional HUD test bench replaces HUD operation is cumbersome, improve test efficiency.

[0006] The utility model discloses a purpose can be realized by following technical scheme:

[0007] A kind of adjustable test bench for HUD optical performance test, including calibration plate adjusting device and universal HUD assembly fixture, the calibration plate adjusting device includes X axis adjusting support, Y axis adjusting support, Z axis adjusting support, pitch adjusting mechanism and calibration plate, the X axis adjusting support is connected with Y axis adjusting support, the Z axis adjusting support is connected with X axis adjusting support, the pitch adjusting mechanism is fixed on the Z axis adjusting support, and is connected with calibration plate;The universal HUD assembly fixture includes bottom plate, quick release rod and universal ball head positioning block, the quick release rod is fixed on bottom plate, and is connected with HUD assembly by the universal ball head positioning block.

[0008] Further, the calibration plate and HUD assembly are located on the same straight line.

[0009] Further, the X axis adjusting support, Y axis adjusting support and Z axis adjusting support all include threaded rod and axial adjusting motor, and the threaded rod and axial adjusting motor are connected by shaft coupling.

[0010] Further, the X axis adjusting support is fixedly connected on the threaded rod of Y axis adjusting support, the Z axis adjusting support is fixedly connected on the threaded rod of X axis adjusting support, and the pitch adjusting mechanism is fixedly connected on the threaded rod of Z axis adjusting support.

[0011] Further, the pitch adjusting mechanism includes pitch adjusting gear, pitch adjusting support and pitch adjusting motor, the pitch adjusting support is connected with the calibration plate by pitch adjusting gear, and the pitch adjusting motor is connected with the calibration plate by pitch adjusting connecting rod.

[0012] Further, the calibration plate is provided with LED light source.

[0013] Further, the quick release rod includes stand and cross bar, one end of the cross bar is provided with through slot, the other end is provided with ball head buckle, and the universal ball head positioning block is connected with the cross bar ball hinge by ball head buckle.

[0014] Further, the bottom plate is provided with bottom plate hole, and the stand is fastened in the bottom plate hole by nut.

[0015] Further, the width of the through slot matches the diameter of the column, and the cross bar is fixed on the column by nuts sleeved on the column and located on both sides of the horizontal plane of the cross bar.

[0016] Further, the universal ball head positioning block has a universal ball head at one end and a threaded hole at the other end, and the HUD assembly and the universal ball head positioning block are fastened and connected through a screw matched with the threaded hole.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model discloses a calibration plate adjusting device which realizes three-axis translation of the calibration plate through X-axis adjusting support, Y-axis adjusting support and Z-axis adjusting support, adjusts the calibration plate through the pitch adjusting mechanism, and adjusts the HUD assembly through the universal HUD assembly clamp, solves the problem that the customized calibration plate and the HUD sample clamp in the traditional HUD test bench cannot be adapted to other models of HUD samples, improves the compatibility of the HUD test bench, and meets the needs of different test scenes.

[0019] 2. The utility model discloses a through slot is set on one end of the cross bar of the quick release rod in the universal HUD assembly clamp, the other end is provided with a ball head buckle, and the universal ball head positioning block is matched and installed with the ball head buckle, the HUD assembly is fixed on the bottom plate by four quick release rods and the universal ball head positioning block, through the modular design of the cross bar and the universal ball head positioning block which can rotate 360 degrees and move up and down on the quick release rod, under the condition of realizing multi-degree-of-freedom adjustment of the HUD assembly, the problem that the traditional HUD test bench is complicated to replace the HUD is solved, and the test efficiency is improved. DRAWINGS

[0020] Figure 1 It is a structure schematic view of the adjustable test bench for HUD optical performance test of the utility model;

[0021] Figure 2 It is a side view of the calibration plate adjusting device;

[0022] Figure 3 It is a side view of the calibration plate adjusting device;

[0023] Figure 4 It is a structure schematic view of the universal HUD assembly clamp;

[0024] Figure 5 It is a side view of the universal HUD assembly clamp;

[0025] Figure 6 It is an auxiliary view of the universal HUD assembly clamp;

[0026] Figure 7 This is a schematic diagram of the structure of the universal ball joint positioning block.

[0027] Legend: 1. Calibration plate adjustment device; 11. X-axis adjustment bracket; 12. Y-axis adjustment bracket; 13. Z-axis adjustment bracket; 14. Pitch adjustment mechanism; 141. Pitch adjustment gear; 142. Pitch adjustment bracket; 143. Pitch adjustment motor; 144. Pitch adjustment linkage; 15. Calibration plate; 2. Universal HUD assembly fixture; 21. Base plate; 211. Base plate hole; 22. Quick release rod; 221. Column; 222. Crossbar; 2221. Through groove; 2222. Ball joint buckle; 23. Universal ball joint positioning block; 231. Universal ball joint; 232. Threaded hole; 3. HUD assembly; 4. Threaded rod; 5. Axial adjustment motor; 6. Coupling. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0029] The following English abbreviations are involved:

[0030] Head-Up Display (HUD) system

[0031] Example 1

[0032] This embodiment provides an adjustable test stand for HUD optical performance testing, such as... Figure 1 As shown, it includes a calibration plate adjustment device 1 and a universal HUD assembly fixture 2. The top view of the calibration plate adjustment device 1 is shown below. Figure 2 As shown, the calibration plate adjustment device 1 includes an X-axis adjustment bracket 11, a Y-axis adjustment bracket 12, a Z-axis adjustment bracket 13, a pitch adjustment mechanism 14, and a calibration plate 15; the side view of the calibration plate adjustment device 1 is shown below. Figure 3As shown, the X-axis adjustment bracket 11 is connected to the Y-axis adjustment bracket 12, and the Z-axis adjustment bracket 13 is connected to the X-axis adjustment bracket 11. The pitch adjustment mechanism 14 is fixed on the Z-axis adjustment bracket 13 and connected to the calibration plate 15. Each of the X-axis adjustment bracket 11, Y-axis adjustment bracket 12, and Z-axis adjustment bracket 13 includes a threaded rod 4 and an axial adjustment motor 5, which are connected by a coupling 6. The X-axis adjustment bracket 11 is fixedly connected to the threaded rod 4 of the Y-axis adjustment bracket 12, the Z-axis adjustment bracket 13 is fixedly connected to the threaded rod 4 of the X-axis adjustment bracket 11, and the pitch adjustment mechanism 14 is fixedly connected to the threaded rod 4 of the Z-axis adjustment bracket 13. The pitch adjustment mechanism 14 includes a pitch adjustment gear 141, a pitch adjustment bracket 142, and a pitch adjustment motor 143. The pitch adjustment bracket 142 is connected to the calibration plate 15 via the pitch adjustment gear 141, and the pitch adjustment motor 143 is connected to the calibration plate 15 via a pitch adjustment linkage 144. The calibration plate 15 is equipped with an LED light source with a power range of 11W-20W, supports touch switch control, and allows adjustment of brightness and color temperature according to testing requirements. The calibration plate adjustment device 1 supports X-axis (±200mm), Y-axis (±250mm), and Z-axis (±150mm) translation with an accuracy of 0.1mm and stepless adjustment of pitch angle (±30°). Translation of the three axes is achieved by rotating the threaded rods 4 on the three axes using three axial adjustment motors 5, and pitch angle adjustment is achieved by rotating the pitch adjustment gear 141 on the calibration plate using the pitch adjustment motor 143, thus meeting the needs of different testing scenarios.

[0033] The structural diagram of the universal HUD assembly fixture 2 is shown below. Figure 4 As shown, the universal HUD assembly fixture 2 includes a base plate 21, a quick-release lever 22, and a universal ball joint positioning block 23. The base plate 21 has base plate holes 211, and the column 221 is fastened into the base plate holes 211 by nuts. The base plate 21 is made of high-strength aluminum alloy (dimensions 560mm × 300mm × 12mm). The hole spacing of the base plate holes 211 is 470mm × 50mm, providing high compatibility. The spacing between the two rows of base plate holes 211 along the length direction (560mm direction) of the base plate 21 is 470mm, and the spacing between the base plate holes 211 along the width direction (300mm direction) of the base plate 21 is 50mm. The quick-release lever 22 is fixed to the base plate 21 and connected to the HUD assembly 3 via the universal ball joint positioning block 23, as shown. Figure 5 As shown. The calibration plate 15 and the HUD assembly 3 are located on the same straight line. The quick-release lever 22 includes a column 221 and a crossbar 222. One end of the crossbar 222 is provided with a through groove 2221. The width of the through groove 2221 matches the diameter of the column 221. The crossbar 222 is fixed to the column 221 by nuts sleeved on the column 221 and located on both sides of the horizontal plane of the crossbar 222. Figure 6As shown. The quick-release lever 22 supports ±50mm adjustment in the X / Y / Z directions, and the height of the column 221 is 240mm. The HUD assembly 3 is freely fixed to the base plate 21 by four quick-release levers 22 and universal ball joint positioning blocks 23. Various HUDs are adapted through the four crossbars 222 on the quick-release levers 22, which can rotate 360° and move up and down. A ball joint latch 2222 is provided at the other end of the crossbar 222, and the universal ball joint positioning block 23 is connected to the crossbar 222 via a ball joint hinge. Figure 7 As shown, one end of the universal ball joint positioning block 23 is a universal ball joint 231, and the other end is provided with a threaded hole 232. The HUD assembly 3 and the universal ball joint positioning block 23 are fastened together by screws, and the screws and threaded holes 232 are matched. The universal HUD assembly fixture 2 achieves quick installation and replacement through a modular quick-release structure, which significantly reduces test preparation time.

[0034] During the HUD optical performance test, firstly, insert the four uprights 221 into the most suitable base plate holes 211 on the base plate 21 and pre-tighten them with nuts. Then, fit the through slot 2221 of the crossbar 222 into the uprights 221, leaving the upper and lower nuts temporarily unlocked, allowing the crossbar 222 to move up and down and rotate 360° along the uprights 221. By visual inspection or laser assistance, position the HUD assembly 3 approximately near the test optical axis, and tighten the upper and lower nuts of the crossbar 222. Then, insert the four universal ball joint positioning blocks 23 into the ball joint buckles 2222 at the corresponding ends of the crossbar 222 to form ball joints. Fix the HUD assembly 3 onto the four universal ball joint positioning blocks 23. At this time, the HUD assembly 3 can make a small range of pitch, yaw, and rotation, which is convenient for final attitude fine-tuning.

[0035] Then, using the calibration plate coordinates provided in the HUD's digital model drawing, the coordinates of the X, Y, and Z axes, as well as the pitch angle, are adjusted on the calibration plate. Based on the calibration plate coordinates, a motor control signal matching the calibration plate coordinates is generated. This motor control signal controls the axial adjustment motors 5 on the X and Y axes, rotating the threaded rods 4 on the X and Y axes to adjust the calibration plate 15 along the X / Y axes, aligning the center of the calibration plate 15 with the center of the virtual image of the HUD in the horizontal direction. Similarly, the same motor control signal controls the axial adjustment motor 5 on the Z axis, rotating the threaded rod 4 on the Z axis to adjust the calibration plate 15 along the Z axis, aligning the virtual image of the HUD with the calibration plate 15 in the vertical direction. Finally, based on the design pitch angle of the HUD (e.g., +5°), the initial pitch angle of the calibration plate (15) is set to +5°. The pitch adjustment motor (143) is started, and the calibration plate 15 is rotated at a rate of 1° / s through the pitch adjustment gear (141) so that the normal of the calibration plate 15 is basically parallel to the optical axis of the HUD.

[0036] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An adjustable test stand for testing the optical performance of a HUD, characterized in that, The system includes a calibration plate adjustment device (1) and a universal HUD assembly fixture (2). The calibration plate adjustment device (1) includes an X-axis adjustment bracket (11), a Y-axis adjustment bracket (12), a Z-axis adjustment bracket (13), a pitch adjustment mechanism (14), and a calibration plate (15). The X-axis adjustment bracket (11) is connected to the Y-axis adjustment bracket (12), and the Z-axis adjustment bracket (13) is connected to the X-axis adjustment bracket (11). The pitch adjustment mechanism (14) is fixed on the Z-axis adjustment bracket (13) and connected to the calibration plate (15). The universal HUD assembly fixture (2) includes a base plate (21), a quick-release rod (22), and a universal ball joint positioning block (23). The quick-release rod (22) is fixed on the base plate (21) and connected to the HUD assembly (3) through the universal ball joint positioning block (23).

2. The adjustable test stand for HUD optical performance testing according to claim 1, characterized in that, The calibration plate (15) and the HUD assembly (3) are located on the same straight line.

3. The adjustable test stand for HUD optical performance testing according to claim 1, characterized in that, The X-axis adjusting bracket (11), Y-axis adjusting bracket (12) and Z-axis adjusting bracket (13) each include a threaded rod (4) and an axial adjusting motor (5), and the threaded rod (4) and the axial adjusting motor (5) are connected by a coupling (6).

4. The adjustable test stand for HUD optical performance testing according to claim 3, characterized in that, The X-axis adjustment bracket (11) is fixedly connected to the threaded rod (4) of the Y-axis adjustment bracket (12), the Z-axis adjustment bracket (13) is fixedly connected to the threaded rod (4) of the X-axis adjustment bracket (11), and the pitch adjustment mechanism (14) is fixedly connected to the threaded rod (4) of the Z-axis adjustment bracket (13).

5. The adjustable test stand for HUD optical performance testing according to claim 1, characterized in that, The pitch adjustment mechanism (14) includes a pitch adjustment gear (141), a pitch adjustment bracket (142), and a pitch adjustment motor (143). The pitch adjustment bracket (142) is connected to the calibration plate (15) through the pitch adjustment gear (141), and the pitch adjustment motor (143) is connected to the calibration plate (15) through the pitch adjustment linkage (144).

6. The adjustable test stand for HUD optical performance testing according to claim 1, characterized in that, The calibration plate (15) is equipped with an LED light source.

7. The adjustable test stand for HUD optical performance testing according to claim 1, characterized in that, The quick-release lever (22) includes a column (221) and a crossbar (222). One end of the crossbar (222) is provided with a through groove (2221), and the other end is provided with a ball head buckle (2222). The universal ball head positioning block (23) is connected to the crossbar (222) by ball joint through the ball head buckle (2222).

8. The adjustable test stand for HUD optical performance testing according to claim 7, characterized in that, The base plate (21) is provided with a base plate hole (211), and the column (221) is fastened in the base plate hole (211) by a nut.

9. The adjustable test stand for HUD optical performance testing according to claim 8, characterized in that, The width of the through groove (2221) matches the diameter of the column (221). The crossbar (222) is fixed to the column (221) by nuts sleeved on the column (221) and located on the upper and lower sides of the horizontal plane of the crossbar (222).

10. The adjustable test stand for HUD optical performance testing according to claim 1, characterized in that, One end of the universal ball joint positioning block (23) is a universal ball joint (231), and the other end is provided with a threaded hole (232). The HUD assembly (3) and the universal ball joint positioning block (23) are fastened together by screws, and the screws and the threaded hole (232) are matched.

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