Four-quadrant detection device of non-uniform field-of-view telescope

Abstract

The utility model relates to the technical field of detection devices, and discloses a four-quadrant detection device of a non-uniform field telescope, which comprises a mounting plate fixed on a laser radar, a circular through hole is formed in the middle of the mounting plate in a penetrating manner, a circular ring is arranged in the middle of the circular through hole, and the circular ring is connected with the side wall of the circular through hole through a plurality of spokes; and a rotating plate matched with the circular through hole is arranged at the top of the mounting plate, scale marks are wound on the outer side of the top of the rotating plate, and a fan-shaped opening is formed in one side of the rotating plate. According to the utility model, angle offset can be realized for a non-uniform field-of-view telescope, so that an appropriate angle position satisfying four-quadrant uniformity can be found, and four-quadrant detection of the non-uniformly distributed telescope can be realized.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and more specifically, to a four-quadrant detection device for a non-uniform field-of-view telescope. Background Technology

[0002] The four-quadrant uniformity index refers to dividing the telescope receiving surface into four equal parts, using a fixture to block the other three receiving surfaces, leaving only one receiving surface to receive the signal. After continuously acquiring signals, a set of raw data is obtained. Then, with distance as the x-axis and signal amplitude as the y-axis, a raw signal profile is plotted using this set of raw data. This profile is then processed to subtract the signal background, obtaining the effective signal profile S1. The effective signal profiles S2, S3, and S4 for the other three quadrants are obtained in the same way, with S1 ≥ S2. ， S4 ≥ S3. The relative average deviation of the effective signals in each pair of quadrants must be ≤20%.

[0003] Uneven quadrant uniformity means that the signal strength received by the lidar in different quadrants is inconsistent, leading to measurement data deviation and affecting the accuracy and reliability of the data. Ordinary telescopes have a uniform and unobstructed field of view, so it is easy to obtain uniform quadrants when performing quadrant segmentation.

[0004] For example, utility model patent application number CN202223304841.0 discloses a four-quadrant consistency detection device for a lidar telescope. It uses a linear drive module to move a rotating platform directly above the telescope, then controls the drive module to rotate the platform. When a contact protrusion on the rotating platform reaches a microswitch on the support platform, the rotating platform stops, and the lidar collects data. After data collection, the rotating platform continues to rotate. The next time a contact protrusion reaches the microswitch, the rotating platform stops, and the lidar collects data again, until data collection for all four quadrants is completed.

[0005] However, the detection device has a complex structure and a high failure rate, making it unsuitable for production lines. Furthermore, the device can only measure four quadrants at fixed positions, which is not applicable to the four-quadrant detection of non-uniformly distributed telescopes. In particular, for some special telescopes, there are different degrees of obstruction in each of the four quadrants. Therefore, to find the four quadrants that meet the requirements, it is necessary to continuously try four quadrants with different angle offsets.

[0006] For telescopes with non-uniform fields of view, there is occlusion in one or more quadrants, making it physically difficult to obtain four quadrants with uniform areas. This necessitates a special fixture that continuously attempts to test different quadrant offset angles to measure and determine acceptable four-quadrant uniformity. Therefore, this invention proposes a four-quadrant testing device for non-uniform field-view telescopes. Utility Model Content

[0007] In view of the problems in the related technologies, this utility model proposes a four-quadrant detection device for a non-uniform field-of-view telescope to overcome the above-mentioned technical problems existing in the existing related technologies.

[0008] Therefore, the specific technical solution adopted by this utility model is as follows:

[0009] A four-quadrant detection device for a non-uniform field-of-view telescope includes a mounting plate fixed to a lidar. A circular through hole is formed through the center of the mounting plate, and a circular ring is provided in the center of the circular through hole. The circular ring and the side wall of the circular through hole are connected by several spokes. A rotating plate that mates with the circular through hole is provided on the top of the mounting plate. A scale line is arranged around the outer side of the top of the rotating plate, and a fan-shaped opening is provided on one side of the rotating plate.

[0010] Furthermore, to facilitate four-quadrant detection for the non-uniform field-of-view telescope, the sides of the mounting plate are vertically extended downwards, with fixing holes at both ends. Several arrows, corresponding to the scale lines, are evenly arranged on the top of the mounting plate, outside the circular through-hole. A circular hole is located on the top of the mounting plate, with one side of the hole connected to the circular through-hole. The rotating plate and the ring are movably connected by pins. The spokes are in the same position and size as those on the telescope, and the ring is coaxial with the telescope. The fan-shaped opening angle is 90 degrees, and the angle between adjacent arrows is also 90 degrees.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1) This utility model can achieve angular offset for non-uniform field telescopes, thereby finding a suitable angular position that satisfies the uniformity of the four quadrants, and thus enabling four-quadrant detection of non-uniformly distributed telescopes.

[0013] 2) This utility model has a simple structure, is easy to install and operate. By setting scale lines on the rotating plate and four evenly spaced arrows on the mounting plate, the accuracy of the four quadrants can be maximized and the accuracy of the four quadrants can be improved. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a four-quadrant detection device for a non-uniform field-of-view telescope according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the mounting plate in a four-quadrant detection device for a non-uniform field-of-view telescope according to an embodiment of the present invention.

[0017] Figure 3 This is an installation diagram of a four-quadrant detection device for a non-uniform field-of-view telescope according to an embodiment of the present invention.

[0018] In the picture:

[0019] 1. Mounting plate; 2. Circular through hole; 3. Ring; 4. Spoke; 5. Rotating plate; 6. Scale line; 7. Fan-shaped opening; 8. Extension; 9. Fixing hole; 10. Arrow; 11. Circular hole; 12. Pin. Detailed Implementation

[0020] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0021] According to an embodiment of the present invention, a four-quadrant detection device for a non-uniform field-of-view telescope is provided.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-3 As shown, the four-quadrant detection device for a non-uniform field-of-view telescope according to an embodiment of this utility model includes a mounting plate 1 fixed to a lidar. A circular through-hole 2 is formed in the center of the mounting plate 1, and a circular ring 3 is positioned in the center of the circular through-hole 2. The circular ring 3 is connected to the sidewall of the circular through-hole 2 by several spokes 4. A rotating plate 5, which mates with the circular through-hole 2, is positioned at the top of the mounting plate 1. A scale line 6 is wound around the outer side of the top of the rotating plate 5, and a fan-shaped opening 7 is formed on one side of the rotating plate 5. In practical application, the mounting plate 1 is mounted on the lidar, and the rotating plate 5 is fixed to the mounting plate 1 by pins 12. Because the lidar telescope experiences field-of-view obstruction, the rotating plate 5 needs to be rotated to a specific angle position to ensure that the cross-sectional area of ​​the four quadrants of the telescope is uniform. The mounting plate 1 has four evenly distributed arrows to indicate the rotation angle, and the rotating plate 5 is silkscreened with angle markings from 0 to 360° to ensure accurate rotation of one quadrant at a time.

[0023] With the help of the above-mentioned technical solution of this utility model, this utility model can achieve angular offset for non-uniform field telescopes, thereby finding a suitable angular position that satisfies the uniformity of the four quadrants, and thus realizing the four quadrant detection of non-uniformly distributed telescopes.

[0024] In one embodiment, each side of the mounting plate 1 has a vertically downward-facing extension 8, and both ends of the extension 8 have fixing holes 9, facilitating the connection between the mounting plate 1 and the lidar. Several arrows 10, corresponding to the scale lines 6, are evenly arranged on the top of the mounting plate 1, outside the circular through hole 2. A circular hole 11 is formed on the top of the mounting plate 1, and one side of the circular hole 11 communicates with the circular through hole 2. The rotating plate 5 and the ring 3 are movably connected by a pin 12. The spokes 4 are in the same position and size as the spokes on the telescope, and the ring 3 is coaxially arranged with the telescope. The angle of the fan-shaped opening 7 is 90 degrees, and the angle between adjacent arrows 10 is also 90 degrees.

[0025] In this embodiment, for telescopes with non-uniform fields of view, there is varying degrees of occlusion in every quadrant, making it difficult to find four quadrants with equal cross-sectional areas. In other words, for telescopes with non-uniform quadrants, there is varying degrees of occlusion in both the traditional horizontal and vertical quadrants. Therefore, angular offsets are needed in these four quadrants to ensure that the cross-sectional areas of the telescope are consistent across all four quadrants. When using the fixture of this invention, the fixture can be adjusted to a certain offset angle to ensure that the occlusion area in each quadrant is the same. This invention solves the problem of detecting the uniformity index of four quadrants in non-uniform field-of-view telescopes, while also being simple to operate, small in size, and having a low failure rate, making it suitable for use in production processes.

[0026] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0027] In specific applications, such as Figure 3 As shown, mounting plate 1 is fixed to the lidar, with spokes 4 on mounting plate 1 aligned with the spokes on the telescope in position and size. The central ring 3 of mounting plate 1 is coaxial with the telescope. Rotating plate 5 is fixed to mounting plate 1 using pins 12. The rotating plate has a 90° open fan-shaped area (fan-shaped opening 7), and the remaining areas are silkscreened with angle markings from 0° to 360° (marking lines 6). Mounting plate 1 has four evenly distributed arrow marks (angle spacing of 90°) (arrows 10). When rotating plate 5 stops at a certain mark, the lidar acquires information for all four quadrants at that position. By rotating plate 5 to the next quadrant position, information for all four quadrants is acquired again, until all information for all four quadrants is collected.

[0028] Furthermore, the pin 12 in this embodiment can also be replaced by a stepper motor. Specifically, the motor shaft synchronously drives the rotation of the rotating plate, enabling the automatic implementation of this solution. The stepper motor scans each scale step by step from 0° to 360°, obtaining the effective profile according to the above method. Then, the four-quadrant deviation generated for each offset angle is calculated. The relevant calculation formulas are as follows:

[0029]

[0030] In the formula, Indicates the relative average deviation (percentage). This represents the average deviation of the four valid signal profiles. Δm represents the average amplitude of the effective signal profile over a defined height range, m represents the maximum deviation of the four effective signal profiles at a certain height, and n represents the number of measurements obtained over a defined height range.

[0031] Computer comparisons show that, within the range of 0° to 360°, a certain offset angle α produces the most suitable relative average deviation, i.e., the most reasonable four-quadrant uniformity position.

[0032] In summary, by utilizing the above-described technical solution of this utility model, it is possible to achieve angular offset for non-uniform field-of-view telescopes, thereby finding a suitable angular position that satisfies the uniformity of the four quadrants, and thus enabling four-quadrant detection for non-uniformly distributed telescopes. Furthermore, this utility model has a simple structure, is easy to install and operate, and by setting scale lines on the rotating plate and four uniform arrows on the mounting plate, it can maximize the accuracy of the four quadrants and improve the overall accuracy of the four quadrant detection.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A four-quadrant detection device for a non-uniform field-of-view telescope, characterized in that, It includes a mounting plate (1) fixed to the lidar, a circular through hole (2) is provided in the middle of the mounting plate (1), a ring (3) is provided in the middle of the circular through hole (2), and the ring (3) is connected to the side wall of the circular through hole (2) by a number of spokes (4). The top of the mounting plate (1) is provided with a rotating plate (5) that cooperates with the circular through hole (2). The outer side of the top of the rotating plate (5) is surrounded by scale lines (6), and a fan-shaped opening (7) is provided on one side of the rotating plate (5).

2. The four-quadrant detection device for a non-uniform field-of-view telescope according to claim 1, characterized in that, The mounting plate (1) has vertically downward extensions (8) on its sides, and fixing holes (9) are provided at both ends of the extensions (8).

3. The four-quadrant detection device for a non-uniform field-of-view telescope according to claim 1, characterized in that, A plurality of arrows (10) that cooperate with the scale line (6) are evenly arranged on the top of the mounting plate (1) and on the outside of the circular through hole (2).

4. The four-quadrant detection device for a non-uniform field-of-view telescope according to claim 1, characterized in that, The mounting plate (1) has a circular hole (11) on its top, and one side of the circular hole (11) is connected to the circular through hole (2).

5. The four-quadrant detection device for a non-uniform field-of-view telescope according to claim 1, characterized in that, The rotating plate (5) and the ring (3) are movably connected by a pin (12).

6. The four-quadrant detection device for a non-uniform field-of-view telescope according to claim 1, characterized in that, The spokes (4) are in the same position and size as the spokes on the telescope, and the ring (3) is coaxially arranged with the telescope.

7. The four-quadrant detection device for a non-uniform field-of-view telescope according to claim 3, characterized in that, The angle of the fan-shaped opening (7) is 90 degrees, and the angle between adjacent arrows (10) is 90 degrees.

Images