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Three-dimensional coordinate measurement method based on line structure light scanning

A three-dimensional coordinate, line structured light technology, applied in measurement devices, optical devices, instruments, etc., can solve the problems of increasing the manufacturing cost and large volume of vision sensors, achieving low cost, simple control and processing system, and improved measurement accuracy. Effect

Active Publication Date: 2016-03-23
GUANGDONG UNIV OF TECH +1
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Problems solved by technology

The visual sensor with dual-camera structure can better solve the occlusion problem in the measurement process, but it increases the manufacturing cost of the visual sensor, the volume is large, and the scanning measurement process also requires two cameras to collect data synchronously.

Method used

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  • Three-dimensional coordinate measurement method based on line structure light scanning
  • Three-dimensional coordinate measurement method based on line structure light scanning

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Embodiment Construction

[0026] refer to Figure 1-2 , the three-dimensional coordinate measuring method based on line structured light scanning of the present invention specifically comprises the following steps:

[0027] S1, start the line laser 2, the laser light emitted by the line laser 2 intersects on the surface of the measured object 1, and reflects to form a laser line 8;

[0028] S2. The laser line 8 formed in step S2 is blocked by the measured object 1 itself or reflected by the left mirror 5 and / or the right mirror 7;

[0029] If the laser line 8 is blocked by the measured object 1 itself, then control the movement of the measured object 1 until the laser line 8 is reflected by the left mirror 5 and / or the right mirror 7;

[0030] If the laser line 8 is reflected by the left reflector 5 and / or the right reflector 7, then:

[0031] When the laser line 8 was reflected by the left reflector 5, the laser line 8 was reflected by the left reflector 5 to the half-mirror 4, and then reflected by...

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Abstract

The present invention discloses a three-dimensional coordinate measurement method based on line structure light scanning. The method comprises the steps of (S1) a line laser emits laser, and a laser line is formed on a measured object, (S2) the image information corresponding to the laser line formed on the measured object, (S3) a control processing system calculates a corresponding three-dimensional coordinate according to the image information of the (S2) and controls the object to move for a particular distance, (S4) the steps (S2) and (S3) are repeated, and the complete three-dimensional coordinate of the measured object is obtained. By using the method of the invention, the laser line formed on the measured object by the line laser is reflected for many times through an optical system, the image information of the laser line can be obtained from different positions with one camera, the block problem in a single-camera visual sensor is solved, the effect of a double-camera visual sensor is achieved, the cost is low, and a control processing system is simple.

Description

technical field [0001] The invention belongs to the technical field of line structured light scanning measurement, in particular a three-dimensional coordinate measurement method based on line structured light scanning. Background technique [0002] The line-structured light scanning measurement device is a laser that reflects a light plane to the measured object, and the light plane intersects with the surface of the measured object to form a laser line. The laser line is a plane curve. The shape of the laser line is related to the geometric shape of the surface of the measured object. The camera collects the image information of the laser line and applies the machine vision related algorithm to obtain the three-dimensional coordinates of the points on the laser line; with a certain The mechanical (scanning) device can obtain the complete three-dimensional information of the measured object. The accuracy of line structured light scanning measurement is moderate, and the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
CPCG01B11/005
Inventor 欧阳祥波李克天李超林
Owner GUANGDONG UNIV OF TECH
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