CN215768995U

CN215768995U - Return-to-zero judging device used in galvanometer scanning rotation process

Info

Publication number: CN215768995U
Application number: CN202121681461.1U
Authority: CN
Inventors: 赵凯; 刘洋; 王少武; 宋耀东; 张凯
Original assignee: Hefei Zhongke Environmental Monitoring Technology National Engineering Laboratory Co ltd
Current assignee: Hefei Zhongke Environmental Monitoring Technology National Engineering Laboratory Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-02-08
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses a return-to-zero judgment device used in a galvanometer scanning rotation process, which belongs to the technical field of environmental monitoring and comprises the following components: the device comprises a slewing bearing, wherein an installation support plate is fixed on an inner ring of the slewing bearing, a driving device, an infrared sensor and a laser sensor are installed on the installation support plate, the driving device is connected with an outer ring of the slewing bearing, an upright post A is installed on the outer ring, and a small hole B is axially formed in the outer ring. The utility model applies the multi-sensor combination to the return-to-zero positioning of the scanning galvanometer, firstly controls the outer ring to rotate around the inner ring rapidly, realizes large-size positioning by using the infrared sensing technology, reduces the return-to-zero range, then carries out rotational stepping at low speed, and realizes the final rapid return-to-zero control in a small range by using the laser detection technology.

Description

Return-to-zero judging device used in galvanometer scanning rotation process

Technical Field

The utility model relates to the technical field of environmental monitoring, in particular to a return-to-zero judgment device used in a galvanometer scanning rotation process.

Background

In the field of environmental monitoring, a scanning galvanometer is used as an important part of laser radar atmospheric monitoring, the scanning precision directly influences the distribution condition and the traceability result of atmospheric pollutants, and the accuracy of zero position judgment directly determines the accumulation precision of scanning of the galvanometer.

The existing scanning galvanometer mostly adopts a single infrared photoelectric sensor, and utilizes the reflection principle of an object to infrared beams to detect, so that the existing scanning galvanometer has the defects that: firstly, the infrared ray has a certain emission angle when being emitted, so that the infrared ray detector is suitable for detecting objects with larger volumes; secondly, the photoelectric coupler inside the photoelectric coupler is easily interfered by various heat sources, vibration or radiation, and cannot meet the requirements of high precision and high reliability; thirdly, the scanning galvanometer is mostly placed outdoors, needs to bear conditions such as high and low temperature and vehicle-mounted vibration, has a severe working environment, and needs to be frequently maintained, adjusted or replaced to ensure zero position precision of the galvanometer.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the background technology and ensure the zero position precision of the galvanometer.

In order to achieve the above object, in one aspect, the present invention provides a return-to-zero determination device for use in a galvanometer scanning rotation process, including a rotation support, a mounting support plate fixed on an inner ring of the rotation support, a driving device, an infrared sensor and a laser sensor mounted on the mounting support plate, the driving device connected to an outer ring of the rotation support, an upright a mounted on the outer ring, and a small hole B axially formed in the outer ring.

Furthermore, the driving device adopts a motor, and a transmission gear of the motor is in transmission connection with the gear of the outer ring.

Further, the arc length of the upright post A rotating along the axial direction of the upright post A is larger than the inner diameter of the small hole B.

Further, the infrared sensor and the laser sensor are arranged at an included angle of 30 degrees, 90 degrees or 180 degrees.

Compared with the prior art, the utility model has the following technical effects: according to the utility model, the infrared sensing technology and the laser detection technology are combined and applied to the zeroing positioning of the scanning galvanometer, the outer ring of the slewing bearing is controlled to rotate around the inner ring rapidly, the zeroing range is reduced by using the infrared sensing technology, then the rotating speed is reduced, and the accurate and rapid zeroing of the scanning galvanometer is realized by using the laser sensing technology in a small range. The method overcomes the outdoor severe working environment, ensures the zero position precision of the vibrating mirror, and simultaneously improves the maintainability of the vibrating mirror.

Drawings

The following detailed description of embodiments of the utility model refers to the accompanying drawings in which:

fig. 1 is a perspective view of a return-to-zero judging apparatus;

fig. 2 is a front view of the return-to-zero judging means;

fig. 3 is a bottom view of the return-to-zero judging means;

fig. 4 is a right side view of the return-to-zero judging means;

fig. 5 is a perspective view of the slewing bearing.

In the figure:

1-a slewing bearing; 2, mounting a support plate; 3, a motor; 4-an infrared sensor; 5-a laser sensor; 6-column A; 7-Aperture B; 11-an inner ring; 12-an outer ring; 121-outer ring gear; 31-transmission gear.

Detailed Description

To further illustrate the features of the present invention, refer to the following detailed description of the utility model and the accompanying drawings. The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure.

As shown in fig. 1 to 5, the present embodiment discloses a zeroing determination device for use in a galvanometer scanning rotation process, which includes a rotary support 1, a mounting support plate 2 is fixed on an inner ring 11 of the rotary support 1, a driving device, an infrared sensor 4 and a laser sensor 5 are mounted on the mounting support plate 2, the driving device is connected to an outer ring 12 of the rotary support 1, an upright a6 is mounted on the outer ring 12, and a small hole B7 is axially formed in the outer ring 12.

The mounting stay 2 has a screw hole, and is fixedly connected to the driving device, the infrared sensor, the laser sensor, and the inner ring of the slewing bearing by screws. The driving device drives the outer ring 12 to rotate around the inner ring 11, the upright post A6 and the small hole B rotate along with the outer ring, when the upright post A6 shields the infrared sensor 4, an initial zero return signal is sent out, the rotating speed of the outer ring 12 around the inner ring 11 is reduced, small stepping is carried out, and zero return control of the scanning galvanometer is achieved until the position of the small hole B is detected by the laser sensor 5.

The infrared sensor is suitable for detecting large objects due to the scattering angle characteristic of the infrared sensor, when the infrared sensor is applied to accurate positioning, the positioning precision cannot be guaranteed, and the laser detection technology is suitable for positioning small-volume objects due to the characteristic of direct laser light, but when the scanning rotating speed is high, the situation that the position of a detection hole cannot be scanned exists, and the working reliability of the infrared sensor cannot be guaranteed. The embodiment ensures the zero position precision of the galvanometer by combining the infrared sensing technology and the laser detection technology and applying the infrared sensing technology and the laser detection technology to the zero return positioning of the galvanometer.

As a further preferable technical solution, the driving device adopts a motor 3, and a transmission gear 31 of the motor 3 is in transmission connection with an outer ring gear 121 of the outer ring 12.

As a further preferable technical solution, the arc length of the column a6 rotating along its axial direction is larger than the inner diameter of the small hole B.

It should be noted that, the pillar a6 is used as a positioning target of the infrared sensor, and the size of the pillar is large, which is convenient for large-scale positioning; the small hole B7 is used as a precise positioning target, and the size of the small hole B7 is small, so that precise positioning is facilitated.

As a further preferable technical solution, the infrared sensor and the laser sensor 5 are arranged at an included angle of 30 degrees, 90 degrees or 180 degrees.

The utility model applies the multi-sensor combination to the return-to-zero positioning of the scanning galvanometer, firstly controls the outer ring to rotate around the inner ring rapidly, realizes large-size positioning by using the infrared sensing technology, reduces the return-to-zero range, then carries out rotational stepping at low speed, and realizes the final rapid return-to-zero control in a small range by using the laser detection technology.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a return to zero judgement device for vibrating mirror scanning gyration in-process which characterized in that includes a slewing bearing, and a fixed installation extension board is gone up to slewing bearing's inner circle, installs drive arrangement, infrared sensor and laser sensor on the installation extension board, and drive arrangement is connected with the slewing bearing outer lane, installs stand A on the outer lane, and the outer lane has seted up aperture B along the axial.

2. The apparatus according to claim 1, wherein the driving device is a motor, and a transmission gear of the motor is in transmission connection with the outer ring gear.

3. The apparatus for determining the return-to-zero in the course of galvanometer scanning rotation according to claim 1, wherein the arc length of the rotation of the column a along the axial direction thereof is longer than the inner diameter of the small hole B.

4. The apparatus of claim 1, wherein the infrared sensor and the laser sensor are disposed at an angle of 30 degrees, 90 degrees, or 180 degrees.