Quasi-solid-state single line laser radar based on MEMS-like galvanometer, and operating method thereof

A single-line laser radar and laser radar technology, applied in the field of photoelectric analysis, can solve the problems of compact and miniaturized laser radar structure, large size of laser galvanometer, and high driving power, and achieve light weight, small size of galvanometer, and compact structure. Effect

Active Publication Date: 2017-05-24
HESAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional laser galvanometer is large in size and high in cost, which is not conducive to the compact structure and miniaturization of the laser radar. Moreover, the driving power of the motor is high when it works continuously at full speed.

Method used

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  • Quasi-solid-state single line laser radar based on MEMS-like galvanometer, and operating method thereof
  • Quasi-solid-state single line laser radar based on MEMS-like galvanometer, and operating method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A quasi-solid-state single-line laser radar based on a MEMS-like galvanometer according to an embodiment of the present invention, the laser radar includes:

[0042] Lasers, detectors and analysis modules, all of which are prior art in this field, will not be repeated here;

[0043] MEMS-like galvanometers, Figure 1-2 Schematically provides a simplified structural diagram of the MEMS-like vibrating mirror of the embodiment of the present invention, as Figure 1-2 As shown, the galvanometer includes:

[0044] Base 11, such as an aluminum base;

[0045] Supporting parts 21, the supporting parts are arranged on opposite sides of the base and are higher than the plane of the base;

[0046] Magnets, such as permanent magnets, are respectively arranged in the grooves on opposite sides of the base, and the opposite magnets are separated from each other and have opposite polarities; the direction of the grooves is perpendicular to the direction of the supporting part ;

...

Embodiment 2

[0058] The quasi-solid-state single-line laser radar based on the MEMS-like vibrating mirror of the embodiment of the present invention is different from Embodiment 1 in that:

[0059] One end of the torsion bar is pressed on the supporting part by a pressing piece, and the pressing piece is fixed on the supporting part through a fixing piece. One end of the torsion bar is cylindrical, and the shape of the pressure piece matches the cylindrical surface of the torsion bar, so that the torsion bar is rotatably fixed on the supporting part.

Embodiment 3

[0061] An application example of the laser radar and the method according to Embodiment 1 of the present invention.

[0062] In this example, if figure 1As shown, there are two torsion bars 41, one end of the two torsion bars is respectively fixed on the support part 21, and the other end is respectively connected to the opposite sides of the support ring; the support ring and the torsion bar are made of high strength, good mechanical properties, Materials with good toughness, such as titanium alloy and carbon fiber; the torsion bar is suitable for being fixed on one end 42 of the support part in a "T" shape, and the "T" shape structure has a through hole, and the support part has a through hole corresponding to the through hole. Matching threaded holes; the fixing part adopts a nut to fix one end of the torsion bar on the support part; the support ring and the two torsion bars connected to it are integrally formed; in the free state, the coil (enclosed cylindrical structure) ...

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Abstract

The invention provides a quasi-solid-state single line laser radar based on an MEMS-like galvanometer, and an operating method of the quasi-solid-state single line laser radar. The quasi-solid-state single line laser radar comprises a laser device, a detector and a galvanometer, wherein the galvanometer comprises a base, magnets, a coil, a reflector, a torsion bar and a fixing member; the magnets are arranged on two opposite sides of the base separately, and the polarities of the isolated magnets at opposite positions are opposite; two ends of the coil are connected with an alternating current; the reflector is connected with the coil; the reflector reflects detection light emitted by the laser device to a detected object, and the detection light on the detected object enters the detector after passing through the reflector; one end of the torsion bar is fixed on the base by means of the fixing member, and the other end is connected with the coil; and the coil generates torque in a magnetic field formed by the magnets under the driving of the alternating current, so as to drive the reflector to twist by taking the torsion bar as an axis. The quasi-solid-state single line laser radar has the advantages of simple structure, low cost and the like.

Description

technical field [0001] The invention relates to photoelectric analysis, in particular to a quasi-solid-state single-line laser radar based on a MEMS-like vibrating mirror and a working method thereof. Background technique [0002] Lidar is a commonly used ranging sensor. Due to its advantages of high resolution and low interference from environmental factors, it is widely used in industrial fields, intelligent robots, automobiles and other fields. Lidar is divided into three types: single-line lidar, multi-line lidar and area array radar, among which single-line lidar is the most widely used. The basic working principle of single-line laser radar is as follows: figure 1 Shown: The laser emitted by the laser transmitter is reflected by the reflective (moving) mirror and then irradiates the detection object. The reflective (moving) mirror is driven by the motor to rotate at a high speed along a certain range. Therefore, the outgoing light scans quickly within a certain angle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08
CPCG01S17/08
Inventor 王瑞夏平杰孙文婷向少卿李一帆
Owner HESAI TECH CO LTD
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