CN216673145U

CN216673145U - Lens focusing mechanism of laser radar

Info

Publication number: CN216673145U
Application number: CN202220130748.3U
Authority: CN
Inventors: 刘敬伟; 李琳平; 黄运龙; 洪绍鹏
Original assignee: Xiamen City Yapha Optoelectronics Technology Co ltd
Current assignee: Xiamen City Yapha Optoelectronics Technology Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-06-03
Anticipated expiration: 2032-01-18

Abstract

The utility model relates to a lens focusing mechanism of a laser radar, which comprises a bracket, a lens and a circuit board, wherein the lens and the circuit board are arranged on the bracket, the circuit board is used for converting a lens focal length signal into an analog signal, the lens focusing mechanism comprises a clamp, a lens automatic rotating mechanism, a light source and a focal length determining module, the clamp is used for clamping the bracket, the lens automatic rotating mechanism is used for automatically rotating a lens, the light source is arranged at a preset distance and is opposite to the lens, and the focal length determining module is electrically connected with the circuit board and the lens automatic rotating mechanism and is used for determining whether the size of the analog signal reaches a preset value and triggering the lens automatic rotating mechanism to stop rotating the lens. The laser radar focusing device is simple in structure, convenient to operate, capable of automatically completing lens focusing of a laser radar and high in working efficiency.

Description

Lens focusing mechanism of laser radar

Technical Field

The utility model relates to the field of laser radars, in particular to a lens focusing mechanism of a laser radar.

Background

The laser radar needs to focus the lens in the production process. In the existing method, a lens is manually rotated to move back and forth for focusing, and after the adjustment is qualified, the imaging quality is manually judged. This approach has the following disadvantages: the requirement on personnel is high, misjudgment is easy to occur, and the efficiency is low.

Disclosure of Invention

The utility model aims to provide a lens focusing mechanism of a laser radar to solve the problems. Therefore, the utility model adopts the following specific technical scheme:

the utility model provides a laser radar's camera lens focusing mechanism, laser radar includes the support and installs camera lens and circuit board on the support, the circuit board is used for converting camera lens focus signal into analog signal, wherein, lens focusing mechanism includes anchor clamps, camera lens automatic rotation mechanism, light source and focus determination module, anchor clamps are used for cliping the support, camera lens automatic rotation mechanism is used for the automatic rotatory camera lens, the light source sets up in predetermined distance department and just right the camera lens, focus determination module with the circuit board with camera lens automatic rotation mechanism electricity is connected for confirm whether analog signal's size reaches the default and triggers camera lens automatic rotation mechanism stops rotatory camera lens.

Further, the clamp is a finger cylinder.

Further, the automatic lens rotating mechanism comprises a motor, a driving gear and a driven gear, the driving gear is fixed on an output shaft of the motor, and the driven gear is sleeved on a focusing ring of the lens and meshed with the driving gear.

Further, the driven gear is fixed on a bearing, the bearing is fixedly installed on a bearing seat, and the bearing seat and the support are respectively located on two sides of the driven gear.

Furthermore, the driven gear is provided with a circular rectangular central through hole and a bearing installation groove which are coaxial, the circular rectangular central through hole is used for being sleeved on the focusing ring, the inner ring of the bearing is fixed on the annular part between the bearing installation groove and the circular rectangular central through hole, and the outer ring of the bearing is fixed on the bearing seat.

Further, the motor is a servo motor or a stepping motor.

Further, the light source is a laser.

Further, the focal length determination module is integrated on the circuit board.

By adopting the technical scheme, the utility model has the beneficial effects that: the laser radar focusing device is simple in structure, convenient to operate, capable of automatically completing lens focusing of a laser radar and high in working efficiency.

Drawings

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a perspective view of a lens focusing mechanism for a lidar in accordance with the present invention;

fig. 2 is a sectional view of a lens focusing mechanism of the laser radar shown in fig. 1.

Detailed Description

It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present application, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations or positional relationships that are based on the orientation shown in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present invention.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 and 2, a lens focusing mechanism of a laser radar 100 is described, wherein the laser radar 100 includes a support 101, and a lens 102 and a circuit board 103 mounted on the support 101, and the circuit board 103 has a photoelectric conversion chip thereon to convert a lens focus signal into an analog signal (e.g., a 0-5V voltage signal). The lens focusing mechanism may include a clamp 1, a lens automatic rotation mechanism 2, a light source 3, and a focus determination module (not shown), wherein the clamp 1 is used to clamp a bracket 101 of the laser radar 100 to fix the laser radar 100 in a proper position to facilitate lens focusing. Preferably, the clamp 1 is a finger cylinder. The lens automatic rotation mechanism 2 is used to automatically rotate the lens 102 (specifically, a lens focus ring) to adjust the focal length of the lens 102. The light source 3 is disposed at a predetermined distance and opposite to the lens 102 to provide a laser spot required for focusing. Preferably, the light source 3 is a commercially available laser. The focal length determining module is electrically connected to the circuit board 103 and the lens automatic rotating mechanism 2, and is configured to determine whether the magnitude of the analog signal reaches a preset value and trigger the lens automatic rotating mechanism 2 to stop rotating the lens 102. Preferably, the focus determination module is integrated on the circuit board 103 to reduce cost and facilitate operation. The circuit board 103 is electrically connected to an upper computer (not shown) in which dedicated software is installed to perform an automatic focusing operation of the lens.

In the present embodiment, the lens automatic rotation mechanism 2 may include a motor 21, a driving gear 22 and a driven gear 23, wherein the driving gear 22 is fixed (for example, by a spline fit) on an output shaft of the motor 21, and the driven gear 23 is sleeved on a focusing ring of the lens 102 and is engaged with the driving gear 22. Therefore, the motor 21 can drive the adjusting ring of the lens 102 to rotate, so that the automatic focusing operation is realized, and the working efficiency is high. The motor 21 may be a servo motor or a stepping motor to precisely control the rotation of the lens 102. It should be understood that the gear transmission mechanism formed by the driving gear 22 and the driven gear 23 may be replaced by a synchronous belt transmission mechanism.

Preferably, the driven gear 23 is fixed to a bearing 24, the bearing 24 is fixedly installed on a bearing seat 25, and the bearing seat 25 and the bracket 101 are respectively located at two sides of the driven gear 23. The driven gear 23 can be rotated more smoothly by the bearing 24. Specifically, the driven gear 23 has a circular rectangular central through hole 231 and a bearing installation groove 232 which are coaxial, and the circular rectangular central through hole 23 is used for being sleeved on a focusing ring of the lens 102 to drive the focusing ring to rotate. The inner race 241 of the bearing 24 is fixed (e.g., by interference fit or keyway fit) to the annular portion 233 between the bearing mount groove 232 and the circular rectangular central through hole 231, and the outer race 242 is fixed to the bearing housing 25.

The number of teeth of the driven gear 23 is greater than that of the driving gear 22, for example, the gear ratio of the driven gear 23 can be 2:1 to 5:1, so that a speed reduction effect is achieved, and focusing accuracy is improved.

The working process of the present invention is briefly described below, the laser radar 100 is clamped by the fixture 1, and the lens 102 is inserted into the central through hole 23 of the driven gear 23, so that the focusing of the lens 102 is clamped in the central through hole 23, the light source 3 is turned on, then the motor 21 is started, the motor 21 drives the driving gear 22, the driven gear 23 rotates to rotate the lens 102, when the size of the analog signal is stably greater than the preset value, it can be determined that the analog signal is qualified, and at the same time, the motor 21 is triggered to stop, and the focusing of the laser radar 100 is completed. The whole focusing process is automatically carried out, the result is accurate, and the working efficiency is high.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a laser radar's camera lens focusing mechanism, laser radar includes the support and installs camera lens and circuit board on the support, the circuit board is used for converting camera lens focus signal into analog signal, a serial communication port, lens focusing mechanism includes anchor clamps, camera lens automatic rotating mechanism, light source and focus determination module, anchor clamps are used for cliping the support, camera lens automatic rotating mechanism is used for the automatic rotatory camera lens, the light source sets up in predetermined distance department and just to the camera lens, focus determination module with the circuit board with camera lens automatic rotating mechanism electricity is connected for confirm whether analog signal's size reaches the default and triggers camera lens automatic rotating mechanism stops rotatory camera lens.

2. The lens focusing mechanism for lidar of claim 1, wherein the clamp is a finger cylinder.

3. The lens focusing mechanism of claim 1, wherein the automatic lens rotation mechanism comprises a motor, a driving gear fixed to an output shaft of the motor, and a driven gear sleeved on the focusing ring of the lens and engaged with the driving gear.

4. The lens focusing mechanism for lidar of claim 3, wherein the driven gear is fixed to a bearing, the bearing is fixedly mounted on a bearing block, and the bearing block and the bracket are respectively located at both sides of the driven gear.

5. The lens focusing mechanism for lidar of claim 4, wherein the driven gear has a circular rectangular central through hole and a bearing mounting groove which are coaxial, the circular rectangular central through hole being adapted to fit over the focusing ring, an inner race of the bearing being fixed to an annular portion between the bearing mounting groove and the circular rectangular central through hole, and an outer race being fixed to the bearing housing.

6. A lens focusing mechanism for lidar as claimed in claim 3 wherein the motor is a servo motor or a stepper motor.

7. The lens focusing mechanism for lidar of claim 1, wherein the light source is a laser.

8. The lens focusing mechanism for lidar of claim 1, wherein the focus determination module is integrated on the circuit board.