Head-up display parallax quantification detection apparatus, detection and calibration method

Abstract

This invention belongs to the field of optical system assembly and adjustment technology, specifically relating to a head-up display (HUD) parallax quantification detection device, detection and adjustment method. The HUD parallax quantification detection device includes an optoelectronic theodolite, a large field-of-view collimator, a mounting bracket, a reference plate reflector, a base, a detector, a precision linear guide, a precision lifting platform, and an optical platform. This invention uses the characteristics of the optoelectronic theodolite to observe the image characters on the HUD to determine the magnitude of the parallax and the adjustment direction of the image source at the focal plane. It can quickly and objectively determine and adjust the parallax of the HUD, and has a wide range of application value in the field of optomechanical assembly and adjustment.

Description

Technical Field

[0001] This invention belongs to the field of optical system assembly and adjustment technology, specifically relating to a head-up display parallax quantification detection device, detection and adjustment method. Background Technology

[0002] Head-up displays (HUDs) are an important airborne targeting and display device on modern fighter jets. Their basic principle is to use a collimating optical system to project targeting characters and key flight parameters onto infinity, allowing the pilot to observe these parameters while aiming at the target, greatly improving attack efficiency and flight safety. HUDs require that the aiming lines emitted from the same point on the image source be parallel beams; the non-parallelism of the beams emitted from the same point is called the parallax of the HUD.

[0003] Parallax is an important optical performance indicator for head-up displays (HUDs), and parallax calibration is based on parallax detection. Traditional parallax detection methods use a large-field-of-view collimator as the detection device, such as... Figure 1 As shown, only the head-tilt observation method can be used, which determines the type and magnitude of parallax by observing the movement of the image source characters on the head-up display relative to the collimator reticle image. This method relies on human visual interpretation, is highly subjective, has low measurement accuracy, and exhibits significant uncertainty in parallax detection. Summary of the Invention

[0004] In view of this, in order to solve the problem of high subjectivity and low accuracy of existing parallax detection and adjustment methods, this invention proposes a parallax quantification detection device, detection and adjustment method for head-up displays. By using an optoelectronic theodolite to observe the characteristics of the image characters on the head-up display, the magnitude of the parallax and the adjustment direction of the image source at the focal plane are determined. This allows for rapid and objective determination and adjustment of the parallax of the head-up display, and has a wide range of application value in the field of optomechanical assembly and adjustment.

[0005] To achieve the above-mentioned technical objectives, the specific technical solution adopted by the present invention is as follows:

[0006] The head-up display parallax quantification detection device includes an optoelectronic theodolite, a large field-of-view collimator, a mounting bracket, a reference plate reflector, a base, a detection instrument, a precision linear guide, a precision lifting platform, and an optical platform;

[0007] The precision lifting platform is fixed on the optical platform; the precision linear guide rail is fixed on the precision lifting platform; the mounting bracket is fixed on the base; the base is fixed on the optical platform; the photoelectric theodolite is fixed on the precision linear guide rail; and the large field-of-view collimator is fixed on the optical platform.

[0008] Furthermore, the wide field-of-view collimator has pitch, azimuth, roll, lift, and pan functions.

[0009] Furthermore, the precision lifting platform has a lifting straightness of less than or equal to 20 seconds and a lifting range of greater than or equal to 150mm.

[0010] Furthermore, the angle between the reference plane of the reference plate and the normal of the reflector is 90°±5".

[0011] Furthermore, the precision linear guide has a straightness of less than or equal to 20 seconds and a range of motion of greater than or equal to 200 mm.

[0012] Furthermore, the magnification of the photoelectric theodolite telescope is greater than or equal to 30 times, and the angle measurement accuracy is higher than 2 seconds.

[0013] Furthermore, the present invention also proposes a head-up display parallax quantification detection method based on the above-mentioned head-up display parallax quantification detection device, characterized by comprising the following steps:

[0014] 1) Construct the parallax quantification detection device for the head-up display;

[0015] 2) Fix the mounting bracket on the base, install the reference plate reflector on the mounting bracket, adjust the photoelectric theodolite to autocollimate with the reference plate reflector, then remove the reference plate reflector, and adjust the large field-of-view collimator to align the center of the photoelectric theodolite with the center of the large field-of-view collimator.

[0016] 3) Install the head-up display onto the mounting bracket, and turn on the detector to load the starry sky image onto the head-up display;

[0017] 4) Adjust the precision lifting platform and precision linear guide rail so that the intersection of the pitch axis and azimuth axis of the photoelectric theodolite is at the center of the eye position on the head-up display, and adjust the photoelectric theodolite so that it can display the azimuth angle and pitch angle normally.

[0018] 5) Use the photoelectric theodolite telescope to aim at the crosshairs on the starry sky screen of the head-up display, so that the crosshairs of the photoelectric theodolite telescope coincide with the crosshairs of the starry sky, and then lock the elevation and azimuth of the photoelectric theodolite.

[0019] 6) Adjust the precision linear guide rail to move the photoelectric theodolite left and right respectively, and observe the crosshairs through the telescope. If the telescope crosshairs always coincide with the crosshairs of the starry sky, then there is no parallax on the head-up display in the 0-degree field of view. If the telescope crosshairs do not coincide with the crosshairs of the starry sky when moving the photoelectric theodolite, then determine whether the parallax is convergent parallax or divergent parallax by blocking the upper combination. If the dividing line generated by the upper combination is above the original crosshairs, it is convergent parallax; if it is below, it is divergent parallax.

[0020] 7) In the 0-degree field of view, move the photoelectric theodolite from the center of the eye position to the left until it reaches the edge of the field of view by adjusting the precision linear guide rail, so that the telescope is aimed at the crosshairs, and record the azimuth angle θ at this position. z Then move the photoelectric theodolite to the right until it reaches the edge of the field of view, aim the telescope at the crosshairs, and record the azimuth angle θ at that position. y Then the magnitude of the azimuth parallax in the 0-degree field of view is Δθ = θ y -θ z Then, the parallax magnitude of the head-up display at different viewing angles was measured using the same method.

[0021] Furthermore, this invention also proposes a head-up display (HUD) parallax calibration method based on the above-mentioned head-up display parallax quantification detection method, characterized by comprising the following steps:

[0022] S201: The convergence parallax of the head-up display is reduced by adding an adjustment shim in front of the image source; the divergence parallax of the head-up display is reduced by reducing the shim in front of the image source.

[0023] S202: Using the method in step 7), adjust the precision lifting platform in the vertical direction to measure the pitch parallax of the head-up display in different fields of view;

[0024] S203: When measuring pitch parallax, if the parallax types are found to be different on the upper and lower sides of the eye center position, the pitch parallax is adjusted by changing the angle of the reflector by adjusting the top screw on the lower side of the reflector mount. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 It is a traditional head-up display parallax detection device;

[0027] Figure 2 This is a diagram illustrating an intermediate stage in the construction of the head-up display quantization parallax detection device according to a specific embodiment of the present invention;

[0028] Figure 3 This is a diagram illustrating the setup result of the head-up display quantization parallax detection device in a specific embodiment of the present invention;

[0029] Figure 4 In a specific embodiment of the present invention, the head-up display shows a starry sky image without parallax.

[0030] Figure 5In a specific embodiment of the present invention, a head-up display showing a starry sky with convergent parallax is observed using a photoelectric theodolite.

[0031] Figure 6 In a specific embodiment of the present invention, a photoelectric theodolite is used to observe a starry sky image on a head-up display with inconsistent vertical field of view.

[0032] 1. Photoelectric theodolite; 2. Precision lifting platform; 3. Precision linear guide rail; 4. Optical platform; 5. Head-up display to be tested; 6. Large field-of-view collimator; 7. Mounting bracket; 8. Reference plate reflector; 9. Base; 10. Testing instrument. Detailed Implementation

[0033] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0034] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0035] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The illustrations only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0038] In one embodiment of the present invention, a head-up display parallax quantification detection device is proposed, comprising an optoelectronic theodolite 1, a large field-of-view collimator 6, a mounting bracket 7, a reference plate reflector 8, a base 9, a detector 10, a precision linear guide rail 3, a precision lifting platform 2, and an optical platform 4.

[0039] The precision lifting platform 2 is fixed on the optical platform 4; the precision linear guide rail 3 is fixed on the precision lifting platform 2; the mounting bracket 7 is fixed on the base 9; the base 9 is fixed on the optical platform 4; the photoelectric theodolite 1 is fixed on the precision linear guide rail 3; and the large field-of-view collimator 6 is fixed on the optical platform 4.

[0040] In this embodiment, the wide field-of-view collimator 6 has pitch, azimuth, roll, lift, and pan functions.

[0041] In this embodiment, the straightness of the precision lifting platform 2 is less than or equal to 20 seconds, and the lifting range is greater than or equal to 150mm.

[0042] In this embodiment, the angle between the reference plane of the reference plate reflector 8 and the normal of the reflector is 90°±5".

[0043] In this embodiment, the straightness of the precision linear guide 3 is less than or equal to 20 seconds, and the range of motion is greater than or equal to 200 mm.

[0044] In this embodiment, the magnification of the telescope of the photoelectric theodolite 1 is greater than or equal to 30 times, and the angle measurement accuracy is higher than 2 seconds.

[0045] Based on the same inventive concept, in one embodiment of the present invention, a head-up display disparity quantification detection method based on the head-up display disparity quantification detection device in the above embodiment is proposed, comprising the following steps:

[0046] 1) Construct a parallax quantification and detection device for head-up displays;

[0047] 2) Fix the mounting bracket 7 on the base 9, install the reference plate reflector 8 on the mounting bracket 7, adjust the photoelectric theodolite 1 to autocollimate with the reference plate reflector 8, then remove the reference plate reflector 8, and adjust the large field of view collimator 6 to align the center of the photoelectric theodolite 1 with the center of the large field of view collimator 6.

[0048] 3) Install the head-up display onto the mounting bracket 7, and turn on the detector 10 to load the starry sky image onto the head-up display;

[0049] 4) Adjust the precision lifting platform 2 and the precision linear guide rail 3 so that the intersection of the pitch axis and azimuth axis of the photoelectric theodolite 1 is at the center of the eye position on the head-up display, and adjust the photoelectric theodolite 1 so that it can display the azimuth angle and pitch angle normally.

[0050] 5) Use the telescope of the photoelectric theodolite 1 to aim at the crosshair point at the optical axis position of the starry sky image on the head-up display, so that the crosshair of the telescope of the photoelectric theodolite 1 coincides with the crosshair of the starry sky, and then lock the elevation and azimuth of the photoelectric theodolite 1.

[0051] 6) Adjust the precision linear guide rail 3 to move the photoelectric theodolite 1 in the left and right directions respectively, and observe the crosshairs through the telescope. If the crosshairs of the telescope always coincide with the crosshairs of the starry sky, then there is no parallax on the head-up display in the 0-degree field of view. If it is found that the crosshairs of the telescope do not coincide with the crosshairs of the starry sky when moving the photoelectric theodolite 1, then determine whether the parallax is convergent parallax or divergent parallax by blocking the upper combination. If it is found that the dividing line generated by the upper combination is above the original crosshairs, then it is convergent parallax; if it is below, then it is divergent parallax.

[0052] 7) In the 0-degree field of view, move the photoelectric theodolite from the center of the eye position to the left until it reaches the edge of the field of view by adjusting the precision linear guide rail, so that the telescope is aimed at the crosshairs, and record the azimuth angle θ at this position. z Then move the photoelectric theodolite to the right until it reaches the edge of the field of view, aim the telescope at the crosshairs, and record the azimuth angle θ at that position. y Then the magnitude of the azimuth parallax in the 0-degree field of view is Δθ = θ y -θ z Then, the parallax magnitude of the head-up display at different viewing angles was measured using the same method.

[0053] Based on the same inventive concept, in one embodiment of the present invention, a head-up display (HUD) parallax calibration method based on the above-described head-up display parallax quantification detection method is proposed, comprising the following steps:

[0054] S201: Convergence parallax of a head-up display is reduced by adding an adjustment shim in front of the image source; divergence parallax of a head-up display is reduced by reducing the shim in front of the image source.

[0055] S202: Using the method in step 7), adjust the precision lifting platform 2 in the vertical direction to measure the pitch parallax of different fields of view on the head-up display;

[0056] S203: When measuring pitch parallax, if the types of parallax are different on the upper and lower sides of the eye center position, the pitch parallax can be adjusted by changing the angle of the reflector by adjusting the top screw on the lower side of the reflector mount.

[0057] The following is a general explanation:

[0058] The overall implementation process of the head-up display disparity quantification detection method based on the head-up display disparity quantification detection device is as follows:

[0059] First, a head-up display quantification parallax detection platform is built. The construction process involves fixing the mounting bracket 7 onto the base 9, installing the reference plate reflector 8 onto the mounting bracket 7 and tightening it with bolts, adjusting the photoelectric theodolite 1 to align it with the reference plate reflector 8, removing the reference plate reflector 8, and adjusting the large field-of-view collimator 6 to coincide with the center of the photoelectric theodolite 1 (e.g., ...). Figure 2 As shown), mount the head-up display on the mounting bracket 7 (as shown). Figure 3 (As shown), turn on the detector 10 to load a starry sky image onto the head-up display. Adjust the precision lifting platform 2 and the precision linear guide rail 3 so that the intersection of the pitch axis and azimuth axis of the photoelectric theodolite 1 is at the center of the eye position on the head-up display, and adjust the photoelectric theodolite 1 to display the azimuth and pitch angles correctly. Use the telescope of the photoelectric theodolite 1 to aim at the crosshairs at the optical axis position of the starry sky image on the head-up display, so that the crosshairs of the telescope of the photoelectric theodolite 1 coincide with the crosshairs of the starry sky, and then lock the pitch and azimuth of the photoelectric theodolite 1. Adjust the precision linear guide rail 3 to move the photoelectric theodolite 1 left and right respectively, and observe the crosshairs at the 0-degree position through the telescope. If the crosshairs of the telescope always coincide with the crosshairs of the starry sky, then there is no parallax on the head-up display in the 0-degree field of view. Figure 4 As shown; if, when moving the photoelectric theodolite 1, it is found that the crosshairs of the telescope do not coincide with the crosshairs of the starry sky, then by blocking the upper combined glass, it is determined whether the parallax is convergent parallax or divergent parallax; if by blocking the upper combination, it is found that the dividing line generated by the upper combination is above the original crosshairs, as shown... Figure 5 As shown, this is convergent parallax, and conversely, divergent parallax. The magnitude of parallax can be calculated by recording the position angles of the crosshairs in the sky at different locations. For example, in a 0-degree field of view, by adjusting the precision linear guide rail 3, the photoelectric theodolite 1 is moved from the center of the eye position to the left until the edge of the field of view, so that the telescope is aimed at the crosshairs, and the azimuth angle at that position is recorded. Similarly, the precision linear guide rail 3 is moved to the right until the edge of the field of view, so that the telescope is aimed at the crosshairs, and the azimuth angle at that position is recorded. The azimuth parallax of the 0-degree field of view is then calculated. The azimuth parallax of different fields of view can be measured using the same method.

[0060] The parallax adjustment method for head-up displays is as follows:

[0061] If convergent parallax exists in the system, it can be reduced by adding an adjustment shim in front of the image source; if divergent parallax exists, it can be reduced by removing the shim in front of the image source. Adjusting the precision lifting platform 2 vertically allows for the measurement of pitch parallax in different fields of view. When measuring pitch parallax, if the parallax types are found to be different on the upper and lower sides of the eye center position, such as... Figure 6As shown, the optical axis position of the head-up display may be incorrect at this time. The parallax can be reduced by adjusting the angle of the reflector.

[0062] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method for quantifying and detecting parallax in a head-up display, characterized in that, A head-up display parallax quantification detection device is used. This device includes an optoelectronic theodolite, a large field-of-view collimator, a mounting bracket, a reference plate reflector, a base, a detection instrument, a precision linear guide rail, a precision lifting platform, and an optical platform. The precision lifting platform is fixed to the optical platform; the precision linear guide rail is fixed to the precision lifting platform; the mounting bracket is fixed to the base; the base is fixed to the optical platform; the optoelectronic theodolite is fixed to the precision linear guide rail; and the large field-of-view collimator is fixed to the optical platform. The method includes the following steps: 1) Construct the parallax quantification detection device for the head-up display; 2) Fix the mounting bracket on the base, install the reference plate reflector on the mounting bracket, adjust the photoelectric theodolite to autocollimate with the reference plate reflector, then remove the reference plate reflector, and adjust the large field-of-view collimator to align the center of the photoelectric theodolite with the center of the large field-of-view collimator. 3) Install the head-up display onto the mounting bracket, and turn on the detector to load the starry sky image onto the head-up display; 4) Adjust the precision lifting platform and precision linear guide rail so that the intersection of the pitch axis and azimuth axis of the photoelectric theodolite is at the center of the eye position on the head-up display, and adjust the photoelectric theodolite so that it can display the azimuth angle and pitch angle normally. 5) Use the photoelectric theodolite telescope to aim at the crosshairs on the starry sky screen of the head-up display, so that the crosshairs of the photoelectric theodolite telescope coincide with the crosshairs of the starry sky, and then lock the elevation and azimuth of the photoelectric theodolite. 6) Adjust the precision linear guide rail to move the photoelectric theodolite left and right respectively, and observe the crosshairs through the telescope. If the telescope crosshairs always coincide with the crosshairs of the starry sky, then there is no parallax on the head-up display in the 0-degree field of view. If the telescope crosshairs do not coincide with the crosshairs of the starry sky when moving the photoelectric theodolite, then determine whether the parallax is convergent parallax or divergent parallax by blocking the upper combination. If the dividing line generated by the upper combination is above the original crosshairs, it is convergent parallax; if it is below, it is divergent parallax. 7) With the field of view at 0 degrees, move the photoelectric theodolite from the center of the eye position to the left until it reaches the edge of the field of view by adjusting the precision linear guide rail, so that the telescope is aimed at the crosshairs, and record the azimuth angle at that position. Then move the photoelectric theodolite to the right until it reaches the edge of the field of view, aim the telescope at the crosshairs, and record the azimuth angle at that position. Then the azimuth parallax of the 0-degree field of view is Then, the parallax magnitude of the head-up display at different viewing angles was measured using the same method.

2. The head-up display parallax quantification detection method based on claim 1, characterized in that, The wide field-of-view collimator has pitch, azimuth, roll, lift, and pan functions.

3. The head-up display parallax quantification detection method based on claim 1, characterized in that, The angle between the reference plane of the reference plate and the normal of the reflector is 90°±5".

4. The head-up display parallax quantification detection method based on claim 1, characterized in that, The magnification of the photoelectric theodolite telescope is greater than or equal to 30 times.

5. A method for adjusting the parallax of a head-up display, implemented using the parallax quantification detection method for a head-up display as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S201: The convergence parallax of the head-up display is reduced by adding an adjustment shim in front of the image source; the divergence parallax of the head-up display is reduced by removing the shim in front of the image source. S202: Using the method in step 7), adjust the precision lifting platform in the vertical direction to measure the pitch parallax of the head-up display in different fields of view; S203: When measuring pitch parallax, if the parallax types are found to be different on the upper and lower sides of the eye center position, the pitch parallax is adjusted by changing the angle of the reflector by adjusting the top screw on the lower side of the reflector mount.

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