Laser axis fixing instrument structure

By using a laser axis setter structure, and utilizing the laser receiving and imaging components with a beam splitter to split the laser beam, combined with optical glass and a CCD camera group, the problem of accurately determining the positional relationship between the target plate and the aircraft in traditional aircraft maintenance and calibration is solved, achieving efficient and high-precision angle measurement and adjustment.

CN224136587UActive Publication Date: 2026-04-17SHAANXI YUANHANG OPTOELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHAANXI YUANHANG OPTOELECTRONICS CO LTD
Filing Date
2025-06-17
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

In the traditional aircraft maintenance and calibration process, it is difficult to accurately determine the relative positional relationship between the target plate and the aircraft, resulting in low work efficiency and poor accuracy. Existing mechanical calibration methods have large errors in manual interpretation and are difficult to efficiently adjust angles and attitudes.

Method used

The laser axis locator structure includes a laser receiving component, a top imaging component, and a tail imaging component. It uses a beam splitter to split the laser beam into two perpendicular beams, and obtains clear spot images through optical glass and a CCD camera group. Combined with a calculator, it calculates the deviation distance and angle to achieve high-precision measurement.

Benefits of technology

It achieves high-precision angle measurement and rapid indication of the adjustment relationship between the aircraft axis and the target plate, quickly solving the adjustment problems existing in the prior art, realizing efficient angle measurement, and rapidly adjusting the placement of the target plate, thus improving work efficiency and accuracy.

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Abstract

The utility model discloses a laser axis determination instrument structure, which belongs to the technical field of laser boresighting, is used for receiving laser beams emitted by a laser boresighting mirror, and comprises a laser receiving assembly, a top shooting assembly and a tail shooting assembly, two vertical plates are symmetrically mounted on two sides of the bottom plate, and a spectroscope is fixed in a space formed by the base and the vertical plates; the spectroscope divides a laser beam emitted by the laser borescope into two light beams which are perpendicular to each other, and the two light beams are transmitted to the top shooting assembly and the tail shooting assembly respectively. Compared with the prior art, the device comprises the two groups of shooting assemblies which are perpendicular to each other, and can obtain a light spot image with a clear outline and a proper size by using optical glass and a CCD camera group, so that the deviation distance and the deviation angle can be conveniently calculated in the later period. In addition, the structure adopts a modular and combined design, and the joints are connected by flanges or threads, so that components with different specifications can be flexibly replaced, and later maintenance is also facilitated.
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Description

Technical Field

[0001] This utility model relates to the field of laser target calibration technology, and in particular to a structure of a laser axis setter. Background Technology

[0002] In aircraft maintenance and calibration, accurately calibrating the target plate position is crucial. Traditional calibration methods involve mechanical calibration (cold calibration). This process first uses a theodolite to level the aircraft, then uses tools and fixtures such as a plumb bob, bubble level, measuring tape, and calibration mirror to determine the relative position between the target plate and the aircraft. After determining the relative position, manually interpreting the calibration using the calibration mirror results in significant errors. Furthermore, during each aircraft calibration, the large size and weight of both the aircraft and the target plate make it difficult to accurately measure angular deviations when placing the target plate, leading to low efficiency and poor precision. Solving these technical problems has long plagued technicians in this field. Utility Model Content

[0003] The main objective of this invention is to provide a laser axis setter structure that can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A laser axis setter structure, mounted on an aircraft target plate, is used to receive a laser beam emitted by a laser target alignment mirror. It is characterized by comprising a laser receiving component, a top imaging component, and a tail imaging component. Specifically: the top of the square shell of the laser receiving component has a top hole, and a top positioning ring for mounting the top imaging component is provided on the outer side of the top hole; a front stepped hole is provided on the front side of the square shell, and a front flange is mounted on the stepped surface of the front stepped hole by screws; an incoming light lens is installed in the middle of the front flange; a base plate is installed inside the square shell, and a base is provided in the middle of the base plate. The center of the base plate is recessed, and a positioning flange is provided on the rear side of the base plate; two vertical plates are symmetrically installed on both sides of the base plate, with the bottom of the vertical plates turned outward to form a perforated positioning plate, and the top of the vertical plates turned inward to form a limiting flange; a beam splitter is fixed in the space formed by the base and the vertical plates; a tail hole for connecting the tail imaging component is provided at the rear end of the square shell; the beam splitter divides the laser beam emitted by the laser target alignment mirror into two mutually perpendicular beams, which are then transmitted to the top imaging component and the tail imaging component respectively.

[0006] Preferably, the top mounting tube of the top imaging assembly is provided with a top connecting flange at its bottom. The bottom of the top mounting tube is fitted onto the top positioning ring platform. The top end face of the top mounting tube is provided with a top connecting hole. The top connecting hole is connected to a top flange plate by screws. A top square hole is opened in the middle of the top flange plate. A top mounting plate is integrally provided inside the top square hole. The top mounting plate is used to install the top camera. A top mounting ring is installed in the bottom cavity of the top mounting tube by threads. A top photosensitive plate is installed in the middle of the top mounting ring.

[0007] Preferably, the tail-mounting assembly includes a tail connecting tube and a tail mounting tube connected to each other, wherein: a flange for connecting a tail hole is provided on the outer side of one end of the tail connecting tube, a tail mounting ring is installed inside the tail connecting tube by threads, a tail photosensitive plate is installed in the middle of the tail mounting ring, and the outer side of the other end of the tail connecting tube is tapped; a connecting thread is provided on the inner wall of the end of the tail mounting tube near the tail connecting tube, the connecting thread is connected to the tapped surface of the tail connecting tube, a tail flange plate is connected to the outer end face of the tail mounting tube by screws, a tail square hole is opened in the middle of the tail flange plate, a tail mounting plate is integrally provided inside the tail square hole, and the tail mounting plate is used to install the tail camera; the distance between the tail camera and the tail photosensitive plate can be adjusted by rotating the tail mounting tube.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1) This device includes two sets of mutually perpendicular imaging components, which can use optical glass and CCD camera groups to obtain clear and appropriately sized light spot images, facilitating subsequent calculation of deviation distance and deviation angle. It can overcome the shortcomings of existing technologies, achieve high-precision angle measurement, quickly indicate the positional relationship between the aircraft axis and the target plate, and rapidly adjust the placement of the target plate.

[0010] 2) The structure adopts a modular and combined design, and all connections are made with flanges or threads, which allows for flexible replacement of components of different specifications and facilitates later maintenance.

[0011] 3) In this structure, the tail photosensitive plate and the tail connecting tube, as well as the top photosensitive plate and the top mounting tube, are all connected by threads, allowing for flexible adjustment of their distance. In addition, the tail mounting tube and the tail connecting tube are connected by threads, allowing the distance between the tail camera and the tail photosensitive plate to be adjusted by rotating the tail mounting tube, facilitating fine-tuning. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is an installation diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of the laser receiving component of this utility model;

[0015] Figure 4 This is a schematic diagram of the installation of the top photosensitive plate of this utility model;

[0016] Figure 5 This is a schematic diagram of the installation of the tail-mounted camera component of this utility model;

[0017] Figure 6This is a schematic diagram of the tail-mounted camera assembly structure of this utility model;

[0018] Figure 7 This is a schematic diagram illustrating the working principle of this utility model.

[0019] In the diagram: 1-Laser receiver assembly, 101-Square shell, 102-Top hole, 103-Top positioning ring platform, 104-Front step hole, 105-Front flange, 106-Light-entering lens, 107-Base plate, 108-Base, 109-Vertical plate, 110-Beam splitter, 111-Tail hole, 2-Top imaging assembly, 201-Top mounting tube, 202-Top connecting flange, 203-Top connecting hole, 204-Top flange plate, 205-Top square hole, 206-Top mounting plate, 207-Top camera, 208-Top mounting ring, 209-Top photosensitive plate, 3-Tail imaging assembly, 301-Tail connecting tube, 302-Tail mounting ring, 303-Tail photosensitive plate, 304-Tail mounting tube, 305-Connecting thread, 306-Tail flange plate, 307-Tail square hole, 308-Tail mounting plate, 309-Tail camera. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 and Figure 7 As shown, the laser axis locator structure is used to receive the laser beam emitted by the laser target mirror. It is characterized by including a laser receiving component 1, a top shooting component 2, and a tail shooting component 3. The laser axis locator structure is installed on the aircraft target plate. In conjunction with the solver and through optical center extraction, the position and attitude of the laser beam emitted by the laser are measured, and then the motion system of the target plate is driven to correct the deviation.

[0023] In the figure, the top of the square shell 101 of the laser receiving component 1 has a top hole 102. A top positioning ring 103 for mounting the top imaging component 2 is provided outside the top hole 102. A front stepped hole 104 is provided on the front side of the square shell 101. A front flange 105 is mounted on the stepped surface of the front stepped hole 104 by screws. A light-gathering lens 106 is installed in the middle of the front flange 105. A base plate 107 is installed inside the square shell 101. A base 108 is provided in the middle of the base plate 107. The middle of the base 108 is recessed. The rear of the base 108... The base plate 107 has a positioning flange on the side, and two vertical plates 109 are symmetrically installed on both sides. The bottom of the vertical plate 109 is turned outward to form a positioning plate with holes, and the top of the vertical plate 109 is turned inward to form a limiting flange. A beam splitter 110 is fixed in the space formed by the base 108 and the vertical plate 109. The rear end of the square shell 101 is provided with a tail hole 111 for connecting the tail shooting component 3. The beam splitter 110 splits the laser beam emitted by the laser target mirror into two mutually perpendicular beams, which are transmitted to the top shooting component 2 and the tail shooting component 3 respectively.

[0024] In the figure, the top mounting tube 201 of the top imaging component 2 is provided with a top connecting flange 202 at its bottom. The bottom of the top mounting tube 201 is fitted onto the top positioning ring platform 103. The top end face of the top mounting tube 201 is provided with a top connecting hole 203. The top connecting hole 203 is connected to the top flange plate 204 by screws. The top flange plate 204 has a top square hole 205 in the middle. The top mounting plate 206 is integrally provided inside the top square hole 205. The top mounting plate 206 is used to install the top camera 207. The top mounting ring 208 is installed in the bottom cavity of the top mounting tube 201 by threads. The top photosensitive plate 209 is installed in the middle of the top mounting ring 208.

[0025] In the figure, the tail imaging assembly 3 includes a tail connecting tube 301 and a tail mounting tube 304 connected to each other. One end of the tail connecting tube 301 has a flange for connecting to the tail hole 111 on its outer side. A tail mounting ring 302 is threadedly installed inside one end of the tail connecting tube 301, and a tail photosensitive plate 303 is installed in the middle of the tail mounting ring 302. The other end of the tail connecting tube 301 is tapped on its outer side. The inner wall of the tail mounting tube 304 near the tail connecting tube 301 has a connecting thread 305, which connects to the tapped surface of the tail connecting tube 301. A tail flange plate 306 is screwed to the outer end face of the tail mounting tube 304. A tail square hole 307 is opened in the middle of the tail flange plate 306, and a tail mounting plate 308 is integrally installed inside the tail square hole 307. The tail mounting plate 308 is used to mount the tail camera 309. The distance between the tail camera 309 and the tail photosensitive plate 303 can be adjusted by rotating the tail mounting tube 304.

[0026] It should be noted that this structure adopts a modular and combinable design, with flange or threaded connections at all joints, allowing for flexible replacement of components of different specifications and facilitating later maintenance. In this structure, the tail photosensitive plate and tail connecting tube, as well as the top photosensitive plate and top mounting tube, are all threaded connections, allowing for flexible adjustment of their distances. Furthermore, the tail mounting tube and tail connecting tube are threaded together, allowing for adjustment of the distance between the tail camera 309 and the tail photosensitive plate 303 by rotating the tail mounting tube 304, facilitating fine-tuning.

[0027] In this embodiment, the photosensitive plate is a light-sensitive medium. When light shines on the photosensitive plate, it causes a photochemical reaction in the photosensitive material, thereby recording the optical image in the form of a latent image. After processing such as development and fixing, the latent image is transformed into a visible image, realizing the recording of optical information. The top photosensitive plate 209 and the tail photosensitive plate 203 are a screen. Light enters the vertical camera. Without the top photosensitive plate 209 and the tail photosensitive plate 203, the vertical camera cannot observe the size of the light spot. The beam splitter 110 is composed of two identical right-angle prisms. Its purpose is to split an incident light ray into two mutually perpendicular light rays, which enter the top photosensitive plate 209 and the tail photosensitive plate 203 respectively.

[0028] In practical applications, based on the rectilinear propagation characteristics of lasers, the laser emitter projects a straight line that is strictly aligned with the aircraft's axis. The emitted laser is received by a receiver. A laser axis locator acquires graphic images and, in conjunction with a calculator, receives target video images to calculate the deviation distances and angles of the laser axis, which are then corrected. The laser axis locator can be viewed internally as two parallel photosensitive plates: a top photosensitive plate and a tail photosensitive plate. The distance between the photosensitive plates is fixed. When the laser beam hits the top photosensitive plate, the coordinates of the laser projection point P1 are measured on the plate. After passing through the top photosensitive plate, the beam then strikes the tail mounting plate, leaving the projection point coordinates P2 on the tail mounting plate. Since the distance between the two photosensitive plates is fixed, the expression for the incident ray in the spatial coordinate system can be calculated based on the coordinates of the two projection points P1. Through computer calculation, the deviation distances and angles can be determined.

[0029] Based on the above principles, the internal optical system of the receiver can be designed. A semi-transparent mirror is placed at a 45° angle before the original position of the top photosensitive plate, and then the top photosensitive plate is placed above the semi-transparent mirror. Due to the principle of plane mirror imaging, the virtual image of the top photosensitive plate will be located behind the semi-transparent mirror at the original position S1. According to the reversibility of the light path, the projection of the reflected light from the semi-transparent mirror onto S1 is the projection of the incident light onto the virtual image of S1. The tail photosensitive plate is still placed in the original manner, and the transmitted light from the semi-transparent mirror is projected onto S2, which is the projection of the incident light onto S2. The photosensitive plate screen is made of a material similar to frosted glass. When the light beam is projected onto the screen, a clear light spot will be generated on the back of the screen. At this time, the camera located on the back of the screen will capture the pattern of the light spot on the back of the screen. After image processing, the coordinate values ​​of the light spot on the screen can be obtained.

[0030] In actual operation, the device includes two sets of mutually perpendicular imaging components. Utilizing optical glass and a CCD camera array, it can obtain clear, appropriately sized light spot images, facilitating subsequent calculations of deviation distances and angles. It overcomes the shortcomings of existing technologies, achieving high-precision angle measurement, quickly indicating the positional relationship between the aircraft axis and the target plate, and rapidly adjusting the target plate's placement.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A laser boresight structure mounted on an aircraft target plate for receiving a laser beam emitted from a laser collimator, characterized by, It includes a laser receiving component (1), a top imaging component (2), and a tail imaging component (3), wherein: The top of the square shell (101) of the laser receiving component (1) is provided with a top hole (102), and a top positioning ring (103) for mounting the top shooting component (2) is provided on the outside of the top hole (102). A front step hole (104) is provided on the front side of the square shell (101), and a front flange (105) is installed on the stepped surface of the front step hole (104) by screws. An incoming light lens (106) is installed in the middle of the front flange (105). The interior of the square shell (101) is equipped with a base plate (107), and a base (108) is provided in the middle of the base plate (107). The middle of the base (108) is recessed, and a positioning flange is provided on the rear side of the base (108). Two vertical plates (109) are symmetrically installed on both sides of the base plate (107). The bottom of the vertical plate (109) is turned outward to form a positioning plate with holes, and the top of the vertical plate (109) is turned inward to form a limiting flange. A beam splitter (110) is fixed in the space formed by the base (108) and the vertical plate (109). The rear end of the square shell (101) is provided with a tail hole (111) for connecting the tail shooting component (3). The beam splitter (110) splits the laser beam emitted by the laser target mirror into two mutually perpendicular beams, which are then transmitted to the top imaging component (2) and the tail imaging component (3), respectively.

2. The laser axis setter structure according to claim 1, wherein The top mounting tube (201) of the top imaging assembly (2) is provided with a top connecting flange (202) at the bottom. The bottom of the top mounting tube (201) is fitted onto the top positioning ring platform (103). The top end face of the top mounting tube (201) is provided with a top connecting hole (203). The top connecting hole (203) is connected to the top flange plate (204) by screws. The top flange plate (204) has a top square hole (205) in the middle. The top mounting plate (206) is integrally provided inside the top square hole (205). The top mounting plate (206) is used to install the top camera (207). The top mounting ring (208) is installed in the bottom cavity of the top mounting tube (201) by threads. The top photosensitive plate (209) is installed in the middle of the top mounting ring (208).

3. The laser axis finder structure of claim 2, wherein, The tail-mounted camera assembly (3) includes a tail-mounted connecting tube (301) and a tail-mounted mounting tube (304) connected to each other, wherein: The tail connecting tube (301) has a flange for connecting the tail hole (111) on the outer side of one end. A tail mounting ring (302) is installed inside the tail connecting tube (301) by thread. A tail photosensitive plate (303) is installed in the middle of the tail mounting ring (302). The other end of the tail connecting tube (301) is tapped. The inner wall of the tail mounting tube (304) near the tail connecting tube (301) is provided with a connecting thread (305), which is connected to the tapping surface of the tail connecting tube (301). The outer end face of the tail mounting tube (304) is connected to the tail flange plate (306) by screws. The tail flange plate (306) has a tail square hole (307) in the middle. The tail mounting plate (308) is integrally provided inside the tail square hole (307). The tail mounting plate (308) is used to install the tail camera (309). The distance between the tail camera (309) and the tail photosensitive plate (303) can be adjusted by rotating the tail mounting tube (304).