CN211826487U

CN211826487U - Lens adjusting assembly and laser radar

Info

Publication number: CN211826487U
Application number: CN202020210261.7U
Authority: CN
Inventors: 纪淑花; 刘玉平; 钟义晖
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-10-30
Anticipated expiration: 2030-02-26

Abstract

The utility model relates to a camera lens adjusting part and laser radar. Wherein, the camera lens adjusting part includes: a lens holder support; the receiving lens seat is provided with a receiving lens, the receiving lens seat is slidably arranged on the lens seat support, and the receiving lens seat can be drawn and adjusted along the optical axis direction of the receiving lens relative to the lens seat support; the transmitting lens is installed on the transmitting lens seat, the transmitting lens seat can be installed on the lens seat support in a sliding mode, and the transmitting lens seat can be adjusted in a drawing mode along the optical axis direction of the transmitting lens relative to the lens seat support. The utility model discloses a camera lens adjusting part can solve the problem of irregular big visual field focus lens focusing difficulty well.

Description

Lens adjusting assembly and laser radar

Technical Field

The utility model relates to an optical equipment technical field especially relates to a camera lens adjusting part and laser radar.

Background

The laser radar is a device for sensing surrounding objects by utilizing laser beams, reflects the positions and the appearances of the surrounding objects in the form of point cloud data, and has the characteristics of high ranging resolution, high speed, small volume, light weight and the like. The optical system controls the propagation direction and convergence and divergence of laser in the system, and is a key part of the laser radar different from other working mechanism radars, so that the optical system is very important for precise mechanical adjustment of the optical system.

In the prior art, in order to optically solve the problem of the field angle, an optical system of a laser radar usually adopts an irregular large-field focusing lens to realize light source emission shaping and high-precision focusing of a return light path, but a traditional focusing mode is generally a rotary lens barrel, and the mode cannot be well applicable to focusing of the irregular large-field focusing lens, so that the focusing of the irregular large-field focusing lens is difficult.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a lens adjustment assembly and a laser radar for solving the problem that the focusing of the irregular large-field focusing lens is difficult.

A lens adjustment assembly, comprising:

a lens holder support;

the receiving lens seat is provided with a receiving lens, the receiving lens seat is slidably arranged on the lens seat support, and the receiving lens seat can be drawn and adjusted along the optical axis direction of the receiving lens relative to the lens seat support; and

the lens holder comprises a transmitting lens, the transmitting lens is mounted on the transmitting lens holder, the transmitting lens holder can be slidably mounted on a lens holder support, and the transmitting lens holder can be relatively pulled and adjusted along the optical axis direction of the transmitting lens.

The lens adjusting assembly is characterized in that a receiving lens seat and a transmitting lens seat are respectively slidably arranged on a lens seat support, a receiving lens is arranged on the receiving lens seat, and a transmitting lens is arranged on the transmitting lens seat; the position of the transmitting lens seat is adjusted by drawing along the optical axis direction of the transmitting lens, so that the focusing of the transmitting lens along the transmitting optical axis direction can be realized; the position of the receiving lens seat is adjusted by drawing along the optical axis direction of the receiving lens, so that focusing of the receiving lens along the receiving optical axis direction can be realized, the focusing process is simple and convenient, and the problem of difficulty in focusing of the irregular large-view-field focusing lens can be well solved.

In one embodiment, the mirror base bracket is provided with a first mounting cavity for mounting the receiving mirror base and a second mounting cavity for mounting the transmitting mirror base, one of the receiving mirror base and the mirror base bracket is provided with a first guide rail, the other one of the receiving mirror base and the mirror base bracket is provided with a first guide groove in sliding fit with the first guide rail, one of the transmitting mirror base and the mirror base bracket is provided with a second guide rail, and the other one of the transmitting mirror base and the mirror base bracket is provided with a second guide groove in sliding fit with the second guide rail.

In one embodiment, the first and second rails are each configured as a dovetail rail, and the first and second guide slots are each configured as a dovetail guide slot.

In one embodiment, the lens adjustment assembly further includes a first adjustment knob, the lens holder support is provided with a first adjustment groove communicated with the first mounting cavity, the first adjustment groove extends along a drawing direction of the receiver lens holder, the receiver lens holder is provided with a first connection hole corresponding to the first adjustment groove, and the first adjustment knob penetrates through the first adjustment groove and is in threaded connection with the first connection hole.

In one embodiment, the number of the first adjusting knobs is two, the first adjusting grooves are respectively disposed on two opposite sides of the mirror base support, the first connecting holes are respectively disposed on two opposite sides of the receiving mirror base, and the first adjusting knobs, the first adjusting grooves and the first connecting holes are arranged in a one-to-one correspondence manner.

In one embodiment, the lens adjusting assembly further includes a second adjusting knob, a second adjusting groove communicated with the second mounting cavity is formed in the lens holder support, the second adjusting groove extends along a drawing direction of the lens holder, a second connecting hole is formed in the lens holder corresponding to the second adjusting groove, and the second adjusting knob penetrates through the second adjusting groove and is in threaded connection with the second connecting hole.

In one embodiment, the number of the second adjusting knobs is two, the second adjusting grooves are respectively arranged on two opposite sides of the mirror base support, the second connecting holes are respectively arranged on two opposite sides of the receiving mirror base, and the second adjusting knobs, the second adjusting grooves and the second connecting holes are arranged in a one-to-one correspondence manner.

In one embodiment, the lens adjusting assembly further includes a transmitting circuit board and a receiving circuit board, the transmitting circuit board is mounted on the lens holder bracket in a position-adjustable manner, the transmitting circuit board is provided with a first laser for distance compensation and a second laser for signal acquisition, the receiving circuit board is mounted on the lens holder bracket in a position-adjustable manner, and the receiving circuit board is provided with a photodetector.

In one embodiment, a first fixing column is arranged on the microscope base support, a first locking hole used for being matched with a first fastener in a locking mode is formed in the first fixing column, a first adjusting hole for allowing the first fastener to penetrate is formed in the transmitting circuit board, the diameter of the first adjusting hole is larger than that of the first locking hole, and the transmitting circuit board is locked and fixed on the end face of the first fixing column through the first fastener; and/or the presence of a gas in the gas,

the lens base support is provided with a second fixing column, the second fixing column is provided with a second locking hole used for being matched with a second fastener in a locking mode, the receiving circuit board is provided with a second adjusting hole for the second fastener to penetrate through, the diameter of the second adjusting hole is larger than that of the second locking hole, and the receiving circuit board is locked and fixed on the end face of the second fixing column through the second fastener.

A laser radar comprises a rotary driving piece, a signal processing board and a lens adjusting assembly, wherein the lens adjusting assembly is arranged on the bottom of the signal processing board, and the rotary driving piece is used for driving the signal processing board and the lens adjusting assembly to rotate.

Drawings

Fig. 1 is a schematic structural diagram of a laser radar according to an embodiment of the present invention;

FIG. 2 is a side view of the lidar of FIG. 1;

FIG. 3 is a rear view of the lidar of FIG. 1;

fig. 4 is a schematic structural diagram of a lens adjustment assembly of the laser radar in fig. 1.

10. A lens adjustment assembly; 11. a lens holder support; 111. a first guide groove; 112. a first regulating groove; 113. a second regulating groove; 114. a first fixed column; 115. a second fixed column; 12. a receiving lens base; 121. receiving a lens; 122. a first guide rail; 123. a first connection hole; 13. a lens mount; 131. a transmitting lens; 132. a second guide rail; 14. a first adjustment knob; 15. a second adjustment knob; 16. a transmitting circuit board; 161. a first laser; 162. a second laser; 17. receiving a circuit board; 171. a photodetector; 18. a first fastener; 19. a second fastener; 20. a signal processing board; 30. the driver is rotated.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

Referring to fig. 1 and 2, a laser radar includes a lens adjusting assembly 10, a signal processing board 20 and a rotary driving member 30, wherein the signal processing board 20 is disposed at the bottom of the lens adjusting assembly 10, and the rotary driving member 30 is disposed at the bottom of the signal processing board 20. The lens adjusting assembly 10 is used to form an optical system of the laser radar, the signal processing board 20 is used to implement signal processing in the system, and the rotary driving member 30 is used to drive the signal processing board 20 and the lens adjusting assembly 10 to perform rotary motion, so as to implement scanning of an object. Optionally, the rotary driving member 30 drives the signal processing board 20 and the lens adjusting assembly 10 to perform a 360 ° rotary motion, so that the laser radar has a larger detection range. The rotary drive member 30 may be a drive motor or a rotary cylinder. The laser radar can be applied to the field of intelligent robots such as sweeping robots and the like and also can be applied to the field of anti-collision systems of precision machine tools.

The optical system controls the propagation direction and convergence and divergence of laser in the system, and is a key part of the laser radar, so that the optical system of the laser radar needs to be precisely and mechanically adjusted before use. The laser radar of the present application can achieve precise mechanical adjustment of the optical system through the lens adjustment assembly 10.

Referring to fig. 1 and 4, in an embodiment, the lens adjusting assembly 10 includes a lens holder bracket 11, a receiving lens holder 12 and a transmitting lens holder 13. A receiving lens 121 is mounted on the receiving lens base 12, the receiving lens base 12 is slidably mounted on the lens base support 11, and the receiving lens base 12 can be adjusted to be drawn along the optical axis direction of the receiving lens 121 relative to the lens base support 11; the emission mirror base 13 is provided with an emission mirror 131, the emission mirror base 13 is slidably mounted on the mirror base support 11, and the emission mirror base 13 can be adjusted in a drawing manner along the optical axis direction of the emission mirror 131 relative to the mirror base support 11.

Wherein the mirror base bracket 11 is used to form a main body support and mounting structure. The lens holder 13 is mounted with a lens 131, and the laser emitted from the light source can be shaped and transmitted through the lens 131. The receiving lens base 12 is provided with a receiving lens 121, and the receiving lens 121 can transmit the focusing and shaping optical signal reflected by the scanned object. The transmitting lens 131 and the receiving lens 121 can adopt irregular large-field-angle lenses, and realize the shaping of light source emission and the high-precision focusing of a return light path.

The lens adjusting assembly 10 is configured such that a receiver lens base 12 and a transmitter lens base 13 are slidably mounted on a lens base support 11, respectively, the receiver lens base 12 is provided with a receiver lens 121, and the transmitter lens base 13 is provided with a transmitter lens 131; the position of the lens holder 13 is adjusted by drawing along the optical axis direction of the lens 131, so that the focusing of the lens 131 along the optical axis direction can be realized; the position of the receiving lens base 12 is adjusted by drawing along the optical axis direction of the receiving lens 121, so that focusing of the receiving lens 121 along the receiving optical axis direction can be realized, the focusing process is simple and convenient, the problem of difficulty in focusing of the irregular large-view-field focusing lens can be well solved, and precise mechanical adjustment of an optical system of the laser radar can be realized.

In one embodiment, the mirror base bracket 11 is provided with a first mounting cavity for mounting the receiving mirror base 12 and a second mounting cavity for mounting the transmitting mirror base 13, one of the receiving mirror base 12 and the mirror base bracket 11 is provided with a first guide rail 122, the other is provided with a first guide groove 111 slidably engaged with the first guide rail 122, one of the transmitting mirror base 13 and the mirror base bracket 11 is provided with a second guide rail 132, and the other is provided with a second guide groove (not shown) slidably engaged with the second guide rail 132. Through the sliding fit of the first guide rail 122 and the first guide groove 111, the movement of the receiving lens base 12 can be guided, so that the receiving optical axis is stable and does not deviate, the optical axis precision is ensured, and the focal length of the receiving lens 121 can be adjusted more accurately. Through the sliding fit of second guide rail 132 and second spout, can lead to the motion of emission mirror seat 13, make the emission optical axis stabilize not squint, guarantee the optical axis precision to can make the focus of emission lens 131 adjust more accurately.

Optionally, the number of the first guide rails 122 and the first guide grooves 111 is at least two, and the first guide rails 122 and the first guide grooves 111 are arranged in a one-to-one correspondence manner; and/or the number of the second guide rail 132 and the second guide groove is at least two, and the second guide rail 132 and the second guide groove are arranged in a one-to-one correspondence manner.

For example, as shown in fig. 4, two opposite outer side walls of the receiver lens base 12 are respectively provided with two first guide rails 122, correspondingly, two opposite inner side walls of the first mounting cavity are respectively provided with two first guide grooves 111, and the first guide rails 122 are in one-to-one sliding fit with the first guide grooves 111, so that through the sliding fit of the four first guide rails 122 and the four first guide grooves 111, the motion stability of the receiver lens base 12 can be effectively ensured, and the accuracy of the focal length adjustment is further improved.

Further, the first rail 122 and the second rail 132 are both configured as dovetail rails, and the first guide groove 111 and the second guide groove are both configured as dovetail guide grooves. Through the sliding fit of the dovetail guide rail and the dovetail guide groove, high-precision adjustment between the receiving lens base 12 and the lens base support 11 and between the transmitting lens base 13 and the lens base support 11 can be realized, the precision of an optical axis is further ensured, and high-precision adjustment of a focal length is realized.

In order to further improve the convenience of the withdrawing adjustment of the receiver 12, referring to fig. 2 and 4, the lens adjusting assembly 10 further includes a first adjusting knob 14, the base frame 11 is provided with a first adjusting groove 112 communicated with the first mounting cavity, the first adjusting groove 112 extends along the withdrawing direction of the receiver 12, the receiver 12 is provided with a first connecting hole 123 corresponding to the first adjusting groove 112, and the first adjusting knob 14 passes through the first adjusting groove 112 and is in threaded connection with the first connecting hole 123. When adjusting, the operator only needs to adjust the first adjusting knob 14 along the first adjusting groove 112, and then the receiving lens base 12 can be driven to move, so as to adjust the focal length of the receiving lens 121, and the operation is simple and convenient.

Optionally, as shown in fig. 3, the number of the first adjusting knobs 14 is two, the first adjusting grooves 112 are respectively disposed on two opposite sides of the mirror base support 11, the first connecting holes 123 are respectively disposed on two opposite sides of the mirror base 12, and the first adjusting knobs 14, the first adjusting grooves 112, and the first connecting holes 123 are disposed in a one-to-one correspondence manner.

In order to further improve the convenience of the pull adjustment of the lens holder 13, referring to fig. 2 and 4, the lens adjustment assembly 10 further includes a second adjustment knob 15, the lens holder support 11 is provided with a second adjustment groove 113 communicated with the second mounting cavity, the second adjustment groove 113 extends along the pull direction of the lens holder 13, the lens holder 13 is provided with a second connection hole (not shown) corresponding to the second adjustment groove 113, and the second adjustment knob 15 passes through the second adjustment groove 113 and is in threaded connection with the second connection hole. When adjusting, the operator only needs to adjust the second adjusting knob 15 along the second adjusting groove 113, and then the lens holder 13 can be driven to move, so as to adjust the focal length of the lens 131, and the operation is simple and convenient.

Optionally, as shown in fig. 3, the number of the second adjusting knobs 15 is two, the second adjusting grooves 113 are respectively disposed on two opposite sides of the mirror base support 11, the second connecting holes are respectively disposed on two opposite sides of the receiving mirror base 12, and the second adjusting knobs 15, the second adjusting grooves 113 and the second connecting holes are arranged in a one-to-one correspondence manner.

In an embodiment, the lens adjustment assembly 10 further includes a transmitting circuit board 16 and a receiving circuit board 17, the transmitting circuit board 16 is mounted on the lens holder support 11 in a position adjustable manner, the transmitting circuit board 16 is provided with a first laser 161 for distance compensation and a second laser 162 for signal acquisition, the receiving circuit board 17 is mounted on the lens holder support 11 in a position adjustable manner, and the receiving circuit board 17 is provided with a photodetector 171.

Specifically, as shown in fig. 2, the transmitting circuit board 16 is mounted on the back of the mirror base bracket 11 in a position-adjustable manner, a first laser 161 is mounted on the upper side of the transmitting circuit board 16, a second laser 162 is mounted on the lower side of the transmitting circuit board 16, the first laser 161 and the second laser 162 may be welded to the transmitting circuit board 16, and the transmitting circuit board 16 is used for driving the first laser 161 and the second laser 162. The receiving circuit board 17 is mounted on the back of the mirror base bracket 11 in a position-adjustable manner, and is spaced from the transmitting circuit board 16, the photodetector 171 is fixed on the receiving circuit board 17 in a patch manner, and the amplification and shaping of the electrical signal converted by the photoelectric converter can be realized by the receiving circuit board 17. Before use, the mounting positions of the transmitting circuit board 16 and the receiving circuit board 17 are adjusted to ensure that the spatial positions of the first laser 161, the second laser 162 and the photodetector 171 do not overlap. The specific operation principles of the transmitting circuit board 16, the receiving circuit board 17, the laser and the photodetector 171 are well known to those skilled in the art, and will not be described in detail herein.

In an embodiment, as shown in fig. 2, a first fixing pillar 114 is disposed on the mirror base bracket 11, a first locking hole (not shown) for locking and matching with the first fastening member 18 is disposed on the first fixing pillar 114, a first adjusting hole (not shown) for passing the first fastening member 18 is disposed on the transmitting circuit board 16, a diameter of the first adjusting hole is larger than a diameter of the first locking hole, and the transmitting circuit board 16 is locked and fixed to an end surface of the first fixing pillar 114 by the first fastening member 18. Through having first regulation hole design to have certain regulation allowance, so, the accessible is adjusted from top to bottom and is controlled transmission circuit board 16 and drive the laser instrument and realize the transmission centering and adjust, and it can to adjust the back rethread first fastener 18 locking fixation. The first fastening member 18 may be a screw, and the first locking hole may be a threaded hole.

Optionally, four first fixing posts 114 are provided on the back of the mirror base bracket 11, and each first fixing post 114 is fastened to the transmitting circuit board 16 by a first fastening member 18. As shown in fig. 3, four first fastening members 18 are arranged in a rectangular shape, and two first fastening members 18 located at opposite corners can perform a positioning function.

In an embodiment, as shown in fig. 2, a second fixing pillar 115 is disposed on the mirror base bracket 11, a second locking hole (not shown) for locking and matching with the second fastening member 19 is disposed on the second fixing pillar 115, a second adjusting hole (not shown) for passing the second fastening member 19 is disposed on the receiving circuit board 17, a diameter of the second adjusting hole is larger than a diameter of the second locking hole, and the receiving circuit board 17 is locked and fixed to an end surface of the second fixing pillar 115 by the second fastening member 19. Through having certain regulation allowance with second regulation hole design, so, the accessible is adjusted from top to bottom and is received circuit board 17 and drive photoelectric detector 171 and realize receiving the centering and adjust, and it can to adjust back rethread second fastener 19 locking fixation. The second fastening member 19 may be a screw, and the second locking hole may be a threaded hole.

Optionally, four second fixing posts 115 are disposed on the back of the mirror base bracket 11, and each second fixing post 115 is locked and fixed with the receiving circuit board 17 through one second fastening member 19, as shown in fig. 3, the four second fastening members 19 are arranged in a rectangular shape, and two second fastening members 19 located at opposite corners can perform a positioning function.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A lens adjustment assembly, comprising:

a lens holder support;

2. The lens adjusting assembly according to claim 1, wherein the base bracket is provided with a first mounting cavity for mounting the receiver base and a second mounting cavity for mounting the transmitter base, one of the receiver base and the base bracket is provided with a first guide rail, the other is provided with a first guide groove slidably engaged with the first guide rail, one of the transmitter base and the base bracket is provided with a second guide rail, and the other is provided with a second guide groove slidably engaged with the second guide rail.

3. The lens adjustment assembly of claim 2, wherein the first and second rails are each configured as a dovetail rail, and the first and second guide slots are each configured as a dovetail guide.

4. The lens adjustment assembly as claimed in claim 2, further comprising a first adjustment knob, wherein the base bracket has a first adjustment groove communicating with the first mounting cavity, the first adjustment groove extends along a drawing direction of the receiving base, the receiving base has a first connection hole corresponding to the first adjustment groove, and the first adjustment knob passes through the first adjustment groove and is screwed with the first connection hole.

5. The lens adjusting assembly according to claim 4, wherein the number of the first adjusting knobs is two, the first adjusting grooves are respectively disposed on two opposite sides of the lens holder support, the first connecting holes are respectively disposed on two opposite sides of the lens holder support, and the first adjusting knobs, the first adjusting grooves and the first connecting holes are disposed in a one-to-one correspondence.

6. The lens adjusting assembly according to claim 2, further comprising a second adjusting knob, wherein the lens holder bracket is provided with a second adjusting groove communicating with the second mounting cavity, the second adjusting groove extends along a drawing direction of the lens holder, the lens holder is provided with a second connecting hole corresponding to the second adjusting groove, and the second adjusting knob passes through the second adjusting groove and is in threaded connection with the second connecting hole.

7. The lens adjusting assembly according to claim 6, wherein the number of the second adjusting knobs is two, the second adjusting grooves are respectively disposed on two opposite sides of the lens holder support, the second connecting holes are respectively disposed on two opposite sides of the lens holder support, and the second adjusting knobs, the second adjusting grooves and the second connecting holes are disposed in a one-to-one correspondence.

8. The lens adjustment assembly according to any one of claims 1 to 7, further comprising a transmitting circuit board and a receiving circuit board, wherein the transmitting circuit board is position-adjustably mounted on the lens holder bracket, the transmitting circuit board is provided with a first laser for distance compensation and a second laser for signal acquisition, the receiving circuit board is position-adjustably mounted on the lens holder bracket, and the receiving circuit board is provided with a photodetector.

9. The lens adjusting assembly as recited in claim 8, wherein the lens holder bracket is provided with a first fixing post, the first fixing post is provided with a first locking hole for locking and matching with a first fastening member, the transmitting circuit board is provided with a first adjusting hole for the first fastening member to pass through, the diameter of the first adjusting hole is larger than that of the first locking hole, and the transmitting circuit board is locked and fixed on the end surface of the first fixing post by the first fastening member; and/or the presence of a gas in the gas,

10. A lidar comprising a rotary driving member, a signal processing board and a lens adjustment assembly as recited in any one of claims 1 to 9, wherein the signal processing board is disposed at a bottom of the lens adjustment assembly, and the rotary driving member is configured to drive the signal processing board and the lens adjustment assembly to perform a rotary motion.