LiDAR autofocus device

Abstract

The present invention provides a laser radar automatic focusing device which is low-cost and can realize the focusing of a laser radar telescope without manual adjustment and will not affect the radar operation. The present invention comprises a telescope body (1), the lower part of the telescope body is matched with an optical fiber access seat (4), the optical fiber access seat is connected with an optical fiber signal line (5) and an optical fiber coupling lens group (6), a focusing gear (7) is arranged on the outer periphery of the optical fiber access seat, a first bracket (8) is arranged on the lower side of a base plate (2), a driving motor (9) and a reversing shaft (10) are arranged on the first bracket, the driving motor is connected to a control panel by electrical signals, the reversing shaft is rotationally matched with the first bracket, a first driving wheel is arranged on the output shaft of the driving motor, a first driven wheel (12) meshing with the first driving wheel is arranged on the reversing shaft, and a second driving wheel (13) meshing with the focusing gear is also arranged on the reversing shaft. The present invention is applied to the field of laser radar technology.

Description

Technical Field

[0001] The present invention relates to the field of laser radar technology, and in particular to a laser radar autofocus device. Background Art

[0002] With the development of science and technology, remote control and automated operation have become a major trend. In the field of laser wind radar, laser wind radar equipment is generally placed outdoors for use. During the long-term use of radar equipment, due to the influence of environmental temperature, humidity and other factors, the focal length of the telescope needs to be reset before the telescope works to ensure detection accuracy. In the prior art, it is generally reset by staff on site. This greatly increases the maintenance cost and the labor intensity of the staff, and also brings great inconvenience to the work of the laser radar. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a low-cost laser radar automatic focusing device that can achieve the focusing of the laser radar telescope without manual adjustment and will not affect the radar operation.

[0004] The technical solution adopted by the present invention is a laser radar automatic focusing device, comprising a telescope body, a substrate and a control board are arranged on the telescope body, a fiber optic access seat is matched at the lower part of the telescope body, a fiber optic signal line and a fiber optic coupling lens group are connected to the fiber optic access seat, a focusing gear is arranged on the outer periphery of the fiber optic access seat, a first bracket is arranged on the lower side of the substrate, a driving motor and a reversing shaft are arranged on the first bracket, the driving motor is connected to the control board by electrical signals, the reversing shaft is rotatably matched with the first bracket, a first driving wheel is arranged on the output shaft of the driving motor, a first driven wheel meshing with the first driving wheel is arranged on the reversing shaft, and a second driving wheel meshing with the focusing gear is also arranged on the reversing shaft. When the focusing gear rotates, the fiber optic coupling lens in the fiber optic coupling lens group is driven to move on the axis of the telescope body, and the distance between the fiber optic coupling lens and the lens group in the telescope body is adjusted to achieve the focusing of the telescope.

[0005] It can be seen from the above scheme that, through the setting of the focusing device, the focusing gear is used to adjust the position of the fiber-optic coupling lens located below the telescope body on the optical axis, so as to adjust the distance between it and the lens group of the telescope body, thereby realizing automatic focusing of the telescope. It has a compact structure and low cost, and can realize automatic focusing of the radar telescope without manual adjustment, thereby providing guarantee for the full automatic operation of the entire equipment.

[0006] A second bracket is also provided on the lower side of the substrate, and photoelectric detection probes are provided on the upper and lower parts of the second bracket. The photoelectric detection probes are connected to the control board signal, and the two photoelectric detection probes respectively detect the upper and lower ends of the focusing gear.

[0007] It can be seen that by setting up the second bracket and the two photoelectric detection probes thereon, the upper and lower ends of the focusing gear can be detected by using the two photoelectric detection probes, so that the stroke of the focusing gear on the optical axis can be detected. When the focusing gear moves to the detection position, the drive motor stops working to avoid a collision, thereby ensuring the safe operation of the focusing device.

[0008] A sleeve extending downward is also provided below the telescope body, a sliding sleeve is also sleeved on the outer periphery of the sleeve, the focusing gear is fixedly provided on the outer periphery of the sliding sleeve, the sliding sleeve cooperates with the fiber access seat, an external thread is provided on the middle outer periphery of the fiber access seat, a top cylinder is also provided in the sleeve, the top cylinder is lubricated and cooperates with the inner wall of the sleeve, an internal thread is provided on the inner wall surface of the top cylinder, the external thread cooperates with the internal thread, wherein the focusing gear, the sliding sleeve, the fiber access seat and the fiber coupling lens group are fixed as a whole, when the focusing gear rotates, the focusing gear, the sliding sleeve, the fiber access seat and the fiber coupling lens group integrally follow the thread to move in the direction of the optical axis, thereby realizing the focusing of the telescope body.

[0009] It can be seen from the above scheme that the focusing gear can move on the optical axis following the thread track through the cooperation between the internal thread and the external thread, and the focusing gear, the sliding sleeve, the optical fiber access seat and the optical fiber coupling lens group are fixed as a whole. When rotating, since the downwardly extending sleeve of the telescope body and the optical fiber access seat are threaded, when the focusing gear rotates, the focusing gear, the sliding sleeve, the optical fiber access seat and the optical fiber coupling lens group will integrally follow the thread to perform fine adjustments in the up and down directions, and the second driving wheel and the focusing gear are externally meshed gears. Therefore, the focusing gear can achieve fine adjustments up and down along the thread lines while realizing rotation, thereby realizing the focusing of the telescope module.

[0010] A limit pin hole is arranged on the wall surface of the sleeve, and the direction is the same as the direction of the optical axis. A limit pin is arranged on the outer wall surface of the top cylinder. The limit pin passes through the limit pin hole and is exposed on the surface of the sleeve. A spring is arranged between the top cylinder and the inner top of the sleeve. The spring is always in a compressed state. The lower end of the spring is pressed against the upper end surface of the top cylinder, and the lower end surface of the top cylinder is pressed against the sliding sleeve.

[0011] It can be seen from the above scheme that the cooperation between the limit pin hole and the limit pin ensures that the relative movement between the sleeve and the top cylinder only occurs on the axis; and the spring presses the optical fiber access seat to eliminate the matching gap between the optical fiber access seat and the sleeve, thereby ensuring the rotation accuracy and the accuracy of the radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a simplified structural diagram of the present invention from a first viewing angle;

[0013] Figure 2 It is a simplified structural diagram of the second viewing angle of the present invention;

[0014] Figure 3 It is a simplified structural diagram of the present invention from a third viewing angle;

[0015] Figure 4 is a simplified structural diagram of the fourth viewing angle of the present invention;

[0016] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure in the AA direction. DETAILED DESCRIPTION

[0017] like Figure 1 to Figure 5 As shown, a laser radar autofocus device comprises a telescope body 1, on which a substrate 2 and a control board 3 are arranged, a fiber optic access seat 4 is matched at the lower part of the telescope body 1, and a fiber optic signal line 5 and a fiber optic coupling lens group 6 are connected to the fiber optic access seat 4, and a focusing gear 7 is arranged on the periphery of the fiber optic access seat 4, and a first bracket 8 is arranged on the lower side of the substrate 2, and a driving motor 9 and a reversing shaft 10 are arranged on the first bracket 8, and the driving motor 9 is connected to the control board 3 by electrical signals, and the reversing shaft 10 is connected to the first bracket The frame 8 rotates in cooperation, a first driving wheel 11 is arranged on the output shaft of the driving motor 9, a first driven wheel 12 meshing with the first driving wheel 11 is arranged on the reversing shaft 10, and a second driving wheel 13 meshing with the focusing gear 7 is also arranged on the reversing shaft 10. When the focusing gear 7 rotates, the fiber coupling lens 14 in the fiber coupling lens group 6 is driven to move on the axis of the telescope body 1, and the distance between the fiber coupling lens 14 and the lens group in the telescope body 1 is adjusted to achieve the focusing of the telescope.

[0018] A second bracket 15 is also provided on the lower side of the substrate 2, and photoelectric detection probes 16 are provided on the upper and lower parts of the second bracket 15. The photoelectric detection probes 16 are connected to the control board 3 by signal, and the two photoelectric detection probes 16 respectively detect the upper and lower ends of the focusing gear 7 in place.

[0019] A sleeve 17 extending downward is also provided below the telescope body 1, a sliding sleeve 18 is also sleeved on the outer periphery of the sleeve 17, the focusing gear 7 is fixedly provided on the outer periphery of the sliding sleeve 18, the sliding sleeve 18 cooperates with the optical fiber access seat 4, an external thread is provided on the middle outer periphery of the optical fiber access seat 4, a top tube 19 is also provided in the sleeve 17, the top tube 19 is lubricated and cooperates with the inner wall of the sleeve 17, an internal thread is provided on the inner wall surface of the top tube 19, the external thread cooperates with the internal thread, as shown in FIG. Figure 5 The B part is a threaded mating part. The focusing gear 7, the sliding sleeve 18, the optical fiber access seat 4 and the optical fiber coupling lens group 6 are fixed as a whole. When the focusing gear 7 rotates, the focusing gear 7, the sliding sleeve 18, the optical fiber access seat 4 and the optical fiber coupling lens group 6 move in the direction of the optical axis in an integrated manner following the thread, thereby realizing the focusing of the telescope body 1.

[0020] A limit pin hole 20 is provided on the wall surface of the sleeve 17, and the direction is the same as the direction of the optical axis. A limit pin 21 is provided on the outer wall surface of the top tube 19. The limit pin 21 passes through the limit pin hole 20 and is exposed on the surface of the sleeve 17. The cooperation between the limit pin hole 20 and the limit pin 21 ensures that the relative movement between the sleeve 17 and the top tube 19 only occurs on the axis. A spring 22 is provided between the top tube 19 and the inner top of the sleeve 17. The spring 22 is always in a compressed state. The lower end of the spring 22 presses against the upper end surface of the top tube 19, and the lower end surface of the top tube 19 presses against the sliding sleeve 18. The spring 22 presses the optical fiber access seat 4 to eliminate the matching clearance between the optical fiber access seat 4 and the sleeve 17, thereby ensuring the rotation accuracy and the accuracy of the radar.

[0021] An optical fiber signal line 5 is connected to the lower part of the optical fiber access seat 4, and the optical fiber signal line 5 is externally connected to the optical module of the radar. After passing through the optical fiber coupling lens 14, the optical fiber signal is emitted from the optical fiber coupling lens 14, and after the optical signal is filtered out of unnecessary signals by the optical filter 24, after passing through the optical lens 25, the optical signal is emitted in parallel to the wedge mirror 26, and under the action of the wedge mirror 26, the optical signal is deflected.

[0022] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser radar autofocus device, comprising a telescope body (1), characterized in that: A base plate (2) and a control panel (3) are arranged on the telescope body (1); a fiber access seat (4) is provided at the lower part of the telescope body (1); a fiber signal line (5) and a fiber coupling lens group (6) are connected to the fiber access seat (4); a focusing gear (7) is provided on the outer periphery of the fiber access seat (4); a first bracket (8) is provided on the lower side of the base plate (2); a drive motor (9) and a reversing shaft (10) are provided on the first bracket (8); the drive motor (9) is connected to the control panel (3) via an electrical signal; the reversing shaft (10) is rotationally matched with the first bracket (8); a first drive wheel (11) is provided on the output shaft of the drive motor (9); and a first gear (10) meshing with the first drive wheel (11) is provided on the reversing shaft (10). A driven wheel (12) is also provided on the reversing shaft (10) with a second driving wheel (13) meshing with the focusing gear (7). When the focusing gear (7) rotates, it drives the optical fiber coupling lens (14) in the optical fiber coupling lens group (6) to move on the axis of the telescope body (1), adjusts the distance between the optical fiber coupling lens (14) and the lens group in the telescope body (1), and realizes the focusing of the telescope. A second bracket (15) is also provided on the lower side of the base plate (2). Photoelectric detection probes (16) are provided on the upper and lower parts of the second bracket (15). The photoelectric detection probes (16) are connected to the control board (3) by signal. The two photoelectric detection probes (16) respectively detect the upper and lower ends of the focusing gear (7) in place.

2. The laser radar autofocus device according to claim 1, characterized in that: A sleeve (17) extending downward is also provided below the telescope body (1), a sliding sleeve (18) is also sleeved on the outer periphery of the sleeve (17), the focusing gear (7) is fixedly provided on the outer periphery of the sliding sleeve (18), the sliding sleeve (18) cooperates with the optical fiber access seat (4), the middle outer periphery of the optical fiber access seat (4) is provided with an external thread, a top sleeve (19) is also provided in the sleeve (17), and the top sleeve (19) is lubricated and cooperates with the inner wall of the sleeve (17). An internal thread is provided on the inner wall surface of the top tube (19), and the external thread cooperates with the internal thread, wherein the focusing gear (7), the sliding sleeve (18), the optical fiber access seat (4) and the optical fiber coupling lens group (6) are fixed as a whole, and when the focusing gear (7) rotates, the focusing gear (7), the sliding sleeve (18), the optical fiber access seat (4) and the optical fiber coupling lens group (6) integrally follow the thread to move in the direction of the optical axis, thereby realizing focusing of the telescope body (1).

3. The laser radar autofocus device according to claim 2, characterized in that: A limit pin hole (20) is arranged on the wall surface of the sleeve (17) and has the same direction as the optical axis. A limit pin (21) is arranged on the outer wall surface of the top cylinder (19). The limit pin (21) passes through the limit pin hole (20) and is exposed on the surface of the sleeve (17). A spring (22) is arranged between the top cylinder (19) and the inner top of the sleeve (17). The spring (22) is always in a compressed state. The lower end of the spring (22) presses against the upper end surface of the top cylinder (19), and the lower end surface of the top cylinder (19) presses against the sliding sleeve (18).

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