Calibration device and calibration method for head-up display measurement system

Abstract

The application discloses a kind of calibration device and calibration method of head-up display measurement system, it is related to head-up display technical field, the calibration device of head-up display measurement system of the present application, including laser, and the dioptric mirror, first mirror and calibration plate sequentially arranged, first mirror is attached with calibration plate, laser beam of laser emission is vertically incident first mirror after reflection by dioptric mirror, and laser beam is emitted to the camera to be calibrated by dioptric mirror after reflection by first mirror.The calibration device of head-up display measurement system provided by the present application is simple in structure, the position and swing angle of camera in head-up display measurement system can be calibrated, to ensure the accuracy of head-up display measurement system measurement result.

Description

Technical Field

[0001] The present invention relates to the technical field of head-up display, and in particular to a calibration device and a calibration method for a head-up display measurement system. Background Art

[0002] Head-up display, or HUD, refers to a driver-centric, blind-operated, multi-functional instrument panel. This system projects crucial driving information, such as speed and navigation, onto the windshield in front of the driver, allowing them to see it without looking down or turning their head. This provides significant assistance and enhances the driving experience.

[0003] Head-up display measurement systems are used to verify the accuracy of head-up display systems, and their accuracy is crucial to the verification of head-up display systems. Existing head-up display measurement systems typically use monocular or binocular cameras to measure the optical parameters of the head-up display system, but the camera position (XYZ) and swing angle (left, right, and up and down) cannot be accurately calibrated. Summary of the Invention

[0004] The object of the present invention is to provide a calibration device and a calibration method for a head-up display measurement system, which can calibrate the position and swing angle of a camera in the head-up display measurement system to ensure the accuracy of the measurement results of the head-up display measurement system.

[0005] The embodiment of the present invention is achieved as follows:

[0006] A calibration device for a head-up display measurement system includes: a laser, and a transflective mirror, a first reflector, and a calibration plate arranged in sequence. The first reflector is bonded to the calibration plate. A laser beam emitted by the laser is reflected by the transflective mirror and then vertically incident on the first reflector. The laser beam reflected by the first reflector is then emitted by the transflective mirror to a camera to be calibrated.

[0007] Optionally, as an implementable method, it also includes a reference plate located between the transflective mirror and the calibration plate and a second reflector attached to the reference plate, and the laser beam emitted by the laser is reflected by the transflective mirror and then vertically incident on the second reflector.

[0008] Optionally, as an implementable manner, the angle between the light emitting direction of the laser and the transflective surface of the transflective mirror is 45°.

[0009] Optionally, as an implementable manner, the transflective mirror is a beam splitter prism or a semi-transparent and semi-reflective mirror, and the first reflective mirror and the second reflective mirror are plane reflective mirrors.

[0010] A calibration method for a head-up display measurement system comprises: providing a laser, a transflective mirror, a first reflector, and a calibration plate, wherein the transflective mirror, the first reflector, and the calibration plate are arranged in sequence, and the first reflector is bonded to the calibration plate; placing the calibration plate at a theoretical virtual image position; placing a camera on an observation plane, adjusting the position of the camera within the observation plane so that a laser beam emitted by the laser is reflected by the calibration plate, passes through the transflective mirror, and is incident on the center of a camera lens; and adjusting the angle of the camera so that the center of the calibration plate coincides with the center of an image obtained by photographing the calibration plate with the camera.

[0011] Optionally, as an implementable method, the calibration plate is placed before the theoretical virtual image position, and the method also includes: providing a reference plate and a second reflector, wherein the second reflector is in contact with the surface of the reference plate; adjusting the angle of the laser so that the laser beam emitted by the laser is reflected by the reflective mirror and then vertically enters the second reflector.

[0012] Optionally, as an implementable manner, after adjusting the angle of the laser so that the laser beam emitted by the laser is reflected by the reflective mirror and vertically enters the second reflector, the method further includes: adjusting the angle of the calibration plate so that the calibration plate is parallel to the reference plate.

[0013] Optionally, as an implementable method, after adjusting the angle of the laser so that the laser beam emitted by the laser is reflected by the transflective mirror and then vertically enters the second reflector, the method also includes: adjusting the angle of the calibration plate so that the laser beam emitted by the laser is reflected by the transflective mirror and the first reflector in sequence and then enters the light output hole of the laser.

[0014] Optionally, as an implementable method, the centers of the transflective surface of the transflective mirror, the first reflector and the calibration plate are located on the same reference line, the reference line passes through the center of the theoretical virtual image, the laser beam is emitted to the center of the transflective surface, and the calibration plate swings around its center to adjust the angle of the calibration plate.

[0015] Optionally, as an implementable manner, the transflective mirror is a beam splitter prism or a semi-transparent and semi-reflective mirror, and the first reflective mirror and the second reflective mirror are plane reflective mirrors.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The present invention provides a calibration device for a head-up display measurement system. The device comprises a laser, a transflective mirror, a first reflector, and a calibration plate, which are sequentially arranged. The first reflector is bonded to the calibration plate. The laser beam emitted by the laser is reflected by the transflective mirror and then perpendicularly incident on the first reflector. After being reflected by the first reflector, the laser beam is emitted by the transflective mirror to a camera to be calibrated. This calibration device for a head-up display measurement system has a simple structure and can calibrate the position and swing angle of the camera in the head-up display measurement system, thereby ensuring the accuracy of the measurement results of the head-up display measurement system.

[0018] The present invention also provides a calibration method for a head-up display measurement system, comprising: providing a laser, a transflective mirror, a first reflector, and a calibration plate, wherein the transflective mirror, the first reflector, and the calibration plate are arranged in sequence, with the first reflector attached to the calibration plate; placing the calibration plate at a theoretical virtual image position; placing a camera on an observation plane, adjusting the camera's position within the observation plane so that the laser beam, after reflecting off the calibration plate, passes through the transflective mirror and enters the center of the camera lens; and adjusting the camera's angle so that the center of the calibration plate coincides with the center of the image obtained by the camera photographing the calibration plate. The above calibration method for a head-up display measurement system is simple to operate and can calibrate the position and swing angle of the camera in the head-up display measurement system to ensure the accuracy of the measurement results of the head-up display measurement system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of a camera calibrated by a calibration device of a head-up display measurement system according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a laser calibration device for a head-up display measurement system according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a calibration plate for a calibration device of a head-up display measurement system provided in an embodiment of the present invention;

[0023] Figure 4 One of the flow charts of the calibration method of the head-up display measurement system provided by an embodiment of the present invention;

[0024] Figure 5 A second flow chart of a calibration method for a head-up display measurement system according to an embodiment of the present invention;

[0025] Figure 6 A third flow chart of a calibration method for a head-up display measurement system according to an embodiment of the present invention;

[0026] Figure 7 This is a fourth flow chart of a calibration method for a head-up display measurement system provided in an embodiment of the present invention.

[0027] Icons: 100-calibration device of head-up display measurement system; 110-laser; 120-transflective mirror; 121-transflective surface; 130-first reflector; 140-calibration plate; 150-reference plate; 160-second reflector; 200-laser beam; 300-camera; 400-reference line. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "center," "vertical," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] In the description of the present application, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "join" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Before the head-up display system is put into use, the accuracy thereof needs to be verified by using a head-up display measurement system. The head-up display measurement system usually uses a monocular or binocular camera 300 to measure the optical parameters of the head-up display system. Therefore, the accuracy of the position and the swing angle of the camera 300 has a great influence on the measurement result. Embodiments of the present application provide a calibration device 100 and a calibration method of a head-up display measurement system, which can calibrate the position and the swing angle of the camera 300 in the head-up display measurement system.

[0035] Please refer to Figure 1 Embodiments of the present application provide a calibration device 100 of a head-up display measurement system, which comprises a laser 110, and a catadioptric mirror 120, a first mirror 130 and a calibration board 140 arranged in sequence. The first mirror 130 is attached to the calibration board 140. The laser beam 200 emitted by the laser 110 is reflected by the catadioptric mirror 120 and then vertically enters the first mirror 130. The laser beam 200 reflected by the first mirror 130 is emitted by the catadioptric mirror 120 to the camera 300 to be calibrated.

[0036] The catadioptric mirror 120 and the calibration board 140 are arranged at intervals. The first mirror 130 is arranged on the surface of the calibration board 140 facing the catadioptric mirror 120. The orthographic projection of the catadioptric mirror 120 on the calibration board 140 coincides with the first mirror 130, so as to ensure that the laser emitted by the laser 110 can be reflected by the catadioptric mirror 120 and then enter the first mirror 130. The laser 110 and the calibration board 140 are located on one side of the transmission-reflection surface 121 of the catadioptric mirror 120. The laser beam 200 emitted by the laser 110 is reflected by the transmission-reflection surface 121 and then vertically enters the first mirror 130. Part of the laser beam 200 reflected by the first mirror 130 is transmitted through the transmission-reflection surface 121 and then emitted by the catadioptric mirror 120.

[0037] In use, the calibration plate 140 is placed at the theoretical virtual image position, the camera 300 of the head-up display measurement system is placed on the observation plane, the laser beam 200 emitted by the catadioptric mirror 120 is incident on the camera 300, the position of the camera 300 on the observation plane is adjusted so that the laser beam 200 is incident on the center of the lens of the camera 300, and the position of the camera 300 is calibrated; the angle of the camera 300 is adjusted so that the center of the calibration plate 140 coincides with the center of the image of the calibration plate 140 captured by the camera 300, and the angle of the camera 300 is calibrated.

[0038] It should be understood that the theoretical virtual image position refers to the imaging position of the head-up display system, and the observation plane refers to the plane on which the camera 300 is located when the head-up display measurement system detects the head-up display system, and the observation plane is parallel to the surface of the calibration plate 140.

[0039] In summary, the calibration device 100 of the head-up display measurement system provided by the embodiment of the present application comprises a laser 110 and a catadioptric mirror 120, a first mirror 130 and a calibration plate 140 arranged in sequence, the first mirror 130 is attached to the calibration plate 140, the laser beam 200 emitted by the laser 110 is reflected by the catadioptric mirror 120 and then is perpendicularly incident on the first mirror 130, the laser beam 200 reflected by the first mirror 130 is emitted by the catadioptric mirror 120 to the camera 300 to be calibrated. The calibration device 100 of the head-up display measurement system has a simple structure, can calibrate the position and angle of the camera 300 in the head-up display measurement system, and ensures the accuracy of the measurement result of the head-up display measurement system.

[0040] For a better understanding of the present application, reference will be made by way of example to the accompanying drawings in which: Figure 2 and Figure 3 Optionally, in an implementable manner of the embodiment of the present application, the calibration device 100 of the head-up display measurement system further comprises a reference plate 150 located between the catadioptric mirror 120 and the calibration plate 140 and a second mirror 160 attached to the reference plate 150, and the laser beam 200 emitted by the laser 110 is reflected by the catadioptric mirror 120 and then is perpendicularly incident on the second mirror 160.

[0041] The reference plate 150 is spaced apart from the reflective mirror 120 and the calibration plate 140, and the reference plate 150 has a reference surface for calibrating the laser 110 and the calibration plate 140, so that the calibration device 100 of the head-up display measurement system has a self-calibration function. The reference surface of the reference plate 150 can be obtained by machining, and the reference plate 150 can pass through the laser beam 200 to avoid blocking the light path. The second reflector 160 can be set on the surface of the reference plate 150 facing the calibration plate 140, or it can be set on the surface of the reference plate 150 away from the calibration plate 140. The orthographic projection of the reflective mirror 120 on the reference plate 150 coincides with the second reflector 160 to ensure that the laser emitted by the laser 110 can be incident on the second reflector 160 after being reflected by the reflective mirror 120. The second reflector 160 can be the same lens as the first reflector 130, such as Figure 2 As shown, when calibrating the laser 110, the lens is placed on the surface of the reference plate 150, as shown in FIG. Figure 1 and Figure 3 As shown, when calibrating the calibration plate 140 and the camera 300 , the lens is placed on the surface of the calibration plate 140 .

[0042] When in use, the reference plate 150 is placed between the reflective mirror 120 and the calibration plate 140. Figure 2 As shown, the angle of the laser 110 is adjusted so that the laser beam 200 emitted by the laser 110 is reflected by the transflective mirror 120 and the second reflective mirror 160 in sequence and then enters the light exit hole of the laser 110. That is, the laser beam 200 can return along the original path, and the laser beam 200 reflected by the transflective mirror 120 is perpendicular to the reference surface of the reference plate 150; Figure 3 As shown, the angle of the calibration plate 140 is adjusted so that the laser beam 200 emitted by the laser 110 is reflected by the reflective mirror 120 and the first reflective mirror 130 in sequence and then enters the light exit hole of the laser 110. That is, the laser beam 200 can return along the original path, and the laser beam 200 reflected by the reflective mirror 120 is perpendicular to the calibration plate 140.

[0043] Optionally, in one implementable manner of the embodiment of the present invention, the transflective mirror 120 is a beam splitter prism or a semi-transparent and semi-reflective mirror, and the first reflective mirror 130 and the second reflective mirror 160 are plane reflective mirrors.

[0044] When the laser beam 200 enters the beam splitter prism or the semi-transparent mirror, a portion of the laser beam 200 is reflected by the beam splitter prism or the semi-transparent mirror, while another portion of the laser beam 200 passes through the beam splitter prism or the semi-transparent mirror and exits the beam splitter prism or the semi-transparent mirror. This configuration enables the transflective mirror 120 to be used for calibration of both the laser 110 and the calibration plate 140, as well as for calibration of the camera 300. When the laser beam 200 enters the plane reflective mirror, it is entirely reflected by the plane reflective mirror, thereby avoiding waste of the laser beam 200.

[0045] Optionally, in one implementation of the present invention, the angle between the light emission direction of laser 110 and the transflective surface 121 of transflective mirror 120 is 45°. In this case, the light emission direction of laser 110 is parallel to calibration plate 140, further facilitating calibration of calibration plate 140. Similarly, when the calibration device 100 for the head-up display measurement system also includes a reference plate 150, the light emission direction of laser 110 is also parallel to reference plate 150, also facilitating calibration of laser 110.

[0046] Please refer to Figure 1 and Figure 4 , an embodiment of the present invention further discloses a calibration method for a head-up display measurement system, which includes:

[0047] S100: providing a laser, a transflective mirror, a first reflective mirror, and a calibration plate, wherein the transflective mirror, the first reflective mirror, and the calibration plate are arranged in sequence, and the first reflective mirror is attached to the calibration plate.

[0048] S200: placing the calibration plate at the theoretical virtual image position.

[0049] S300: placing a camera on an observation plane, and adjusting the position of the camera in the observation plane so that the laser beam emitted by the laser is reflected by the calibration plate, passes through the transflective mirror, and enters the center of the camera lens.

[0050] S400: Adjust the angle of the camera so that the center of the calibration plate coincides with the center of the image obtained by the camera shooting the calibration plate.

[0051] The calibration plate 140 is placed at the theoretical virtual image position, and the camera 300 is placed at the observation plane, wherein the camera 300 and the calibration plate 140 are respectively located on both sides of the telescope 120. The theoretical virtual image position refers to the position where the head-up display system is imaged, and the observation plane refers to the plane where the camera 300 is located when the head-up display measurement system is testing the head-up display system. The observation plane is parallel to the surface of the calibration plate 140. Figure 1 As shown by the solid arrow in FIG, the laser 110 emits a laser beam 200, and the laser beam 200 is reflected by the transflective surface 121 of the transflective mirror 120 and vertically enters the first reflector 130 on the calibration plate 140; Figure 1As shown by the dotted arrow in , the first reflector 130 reflects the laser beam 200, and the reflected laser beam 200 passes through the transflective mirror 120 and is emitted toward the camera 300. The position of the camera 300 in the observation plane is adjusted so that the laser beam 200 is incident on the center of the lens of the camera 300 to complete the calibration of the position of the camera 300. With the center of the lens of the camera 300 as the reference point, the angle of the camera 300 is adjusted so that the center of the calibration plate 140 coincides with the center of the image obtained by the camera 300 photographing the calibration plate 140 to complete the calibration of the swing angle of the camera 300. It should be understood that the image obtained by the camera 300 photographing the calibration plate 140 can be an image of the calibration plate 140 or an image of the pattern on the calibration plate 140.

[0052] The calibration method of the head-up display measurement system is simple to operate and can calibrate the position and swing angle of the camera 300 in the head-up display measurement system to ensure the accuracy of the measurement results of the head-up display measurement system.

[0053] Please refer to Figure 2 and Figure 5 Optionally, in one possible implementation of the embodiment of the present invention, the calibration plate 140 is placed before the theoretical virtual image position, and the method further includes:

[0054] S500: providing a reference plate and a second reflector, wherein the second reflector is bonded to a surface of the reference plate.

[0055] S600: Adjust the angle of the laser so that the laser beam emitted by the laser is reflected by the transflective mirror and then vertically enters the second reflective mirror.

[0056] The reference plate 150 is placed between the reflective mirror 120 and the calibration plate 140, as shown in FIG. Figure 2 As shown by the solid arrow in FIG, the laser 110 emits a laser beam 200. After being reflected by the transflective surface 121 of the transflective mirror 120, the laser beam 200 enters the second reflector 160 on the reference plate 150. The angle of the laser 110 is adjusted, as shown in FIG. Figure 2 As shown by the dotted arrow in , the laser beam 200 emitted by the laser 110 is reflected by the second reflector 160 and the transflective mirror 120 in sequence and then enters the light exit hole of the laser 110. At this time, the laser beam 200 reflected by the transflective mirror 120 is vertically incident on the second reflector 160 to complete the calibration of the laser 110.

[0057] Please refer to Figure 3 and Figure 6 Optionally, in one possible implementation of the embodiment of the present invention, after adjusting the angle of the laser 110 so that the laser beam 200 emitted by the laser 110 is reflected by the transflective mirror 120 and vertically incident on the second reflector 160, the method further includes:

[0058] S710: Adjust the angle of the calibration plate so that the calibration plate is parallel to the reference plate.

[0059] like Figure 3 As shown by the solid arrow in FIG, the laser 110 emits a laser beam 200. After being reflected by the transflective surface 121 of the transflective mirror 120, the laser beam 200 enters the first reflector 130 on the reference plate 150. The angle of the calibration plate 140 is adjusted, as shown in FIG. Figure 3 As shown by the dotted arrow in , when the calibration plate 140 is parallel to the reference plate 150 , the laser beam 200 reflected by the transflective mirror 120 is vertically incident on the first reflective mirror 130 to complete the calibration of the calibration plate 140 .

[0060] Please refer to Figure 3 and Figure 7 Optionally, in one possible implementation of the embodiment of the present invention, after adjusting the angle of the laser 110 so that the laser beam 200 emitted by the laser 110 is reflected by the transflective mirror 120 and vertically incident on the second reflector 160, the method further includes:

[0061] S720: Adjust the angle of the calibration plate so that the laser beam emitted by the laser is reflected by the transflective mirror and the first reflective mirror in sequence and then enters the light exit hole of the laser.

[0062] like Figure 3 As shown by the solid arrow in FIG, the laser 110 emits a laser beam 200. After being reflected by the transflective surface 121 of the transflective mirror 120, the laser beam 200 enters the first reflector 130 on the reference plate 150. The angle of the calibration plate 140 is adjusted, as shown in FIG. Figure 3 As shown by the dotted arrow in the figure, when the laser beam 200 emitted by the laser 110 is reflected by the transflective mirror 120 and the first reflector 130 in sequence and then enters the light exit hole of the laser 110, the laser beam 200 reflected by the transflective mirror 120 is vertically incident on the first reflector 130 to complete the calibration of the calibration plate 140.

[0063] Please refer to Figures 1 to 3 Optionally, in one implementation of the embodiment of the present invention, the centers of the transflective surface 121 of the transflective mirror 120, the first reflector 130, and the calibration plate 140 are located on the same reference line 400. The reference line 400 passes through the center of the theoretical virtual image. The laser beam 200 is incident on the center of the transflective surface 121, and the calibration plate 140 is swung around its center to adjust the angle of the calibration plate 140. This configuration ensures that the laser beam 200 can be incident on the transflective mirror 120 and the first reflector 130, and facilitates calibration of the calibration plate 140 and the camera 300.

[0064] Optionally, in one possible implementation of the embodiment of the present invention, the transflective mirror 120 is a beam splitter prism or a semi-transparent mirror, and the first reflector 130 and the second reflector 160 are plane mirrors. This configuration allows the transflective mirror 120 to be used for calibration of the laser 110 and the calibration plate 140, as well as for calibration of the camera 300. When the laser beam 200 enters the plane mirror, it is completely reflected by the plane mirror, thereby avoiding waste of the laser beam 200.

[0065] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A calibration device for a head-up display measurement system, characterized in that: include: A laser, and a transflective mirror, a first reflector, and a calibration plate arranged in sequence, wherein the first reflector is bonded to the calibration plate, and the laser beam emitted by the laser is reflected by the transflective mirror and then vertically incident on the first reflector. After being reflected by the first reflector, the laser beam is emitted from the transflective mirror to the camera to be calibrated; It also includes a reference plate located between the transflective mirror and the calibration plate and a second reflector attached to the reference plate. The laser beam emitted by the laser is reflected by the transflective mirror and then vertically enters the second reflector. The reference plate can transmit the laser beam. The second reflector and the first reflector are the same lens.

2. The calibration device of the head-up display measurement system according to claim 1, characterized in that: The angle between the light emitting direction of the laser and the transflective surface of the transflective mirror is 45°.

3. The calibration device of the head-up display measurement system according to claim 1, characterized in that: The transflective mirror is a beam splitter prism or a semi-transparent and semi-reflective mirror, and the first reflective mirror and the second reflective mirror are plane reflective mirrors.

4. A calibration method for a head-up display measurement system, characterized in that: The method comprises: Providing a laser, a transflective mirror, a reflector, a reference plate, and a calibration plate, wherein the transflective mirror, the reference plate, and the calibration plate are arranged in sequence, and the reflector is bonded to the reference plate; Adjusting the angle of the laser so that the laser beam emitted by the laser is reflected by the transflective mirror and then vertically incident on the reflective mirror; Placing the calibration plate at the theoretical virtual image position, and moving the reflector to fit the calibration plate; Adjusting the angle of the calibration plate so that the laser beam is vertically incident on the reflector after being reflected by the transflective mirror; Placing a camera on an observation plane, and adjusting the position of the camera within the observation plane so that the laser beam emitted by the laser is reflected by the calibration plate, passes through the transflective mirror, and enters the center of the camera lens; The angle of the camera is adjusted so that the center of the calibration plate coincides with the center of the image obtained by the camera photographing the calibration plate.

5. The calibration method of the head-up display measurement system according to claim 4, characterized in that: The centers of the transflective surface of the transflective mirror, the reflector and the calibration plate are located on the same reference line, and the reference line passes through the center of the theoretical virtual image. The laser beam is emitted to the center of the transflective surface, and the calibration plate swings around its center to adjust the angle of the calibration plate.

6. The calibration method of the head-up display measurement system according to claim 4, characterized in that: The transflective mirror is a beam splitter prism or a semi-transparent and semi-reflective mirror, and the reflective mirror is a plane reflective mirror.

Images