High speed line scan sensor and its calibration method
A calibration method and sensor technology, which can be applied to instruments, measuring devices, and optical devices, etc., can solve the problems of area scan camera shooting speed limitation and three-dimensional measurement limitation, and achieve the effects of compact structure, improved scanning speed, and low energy consumption.
Active Publication Date: 2021-06-22
JIANGSU JITRI HUST INTELLIGENT EQUIP TECH CO LTD
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Problems solved by technology
However, due to the limitation of the shooting speed of the area array camera, the three-dimensional measurement of the line structured light sensor on the surface of the high-speed moving object is limited.
Method used
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[0030] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0031] Such as figure 1 As shown, a high-speed line scan sensor proposed by the present invention includes a line camera 1 and a one-dimensional scanning vibrating mirror 2; the one-dimensional scanning vibrating mirror 2 preferably adopts a one-dimensional MEMS scanning vibrating mirror, and the volume is smaller; the one-dimensional scanning vibrating mirror Mirror 2 can control the brightness of the laser spot through coding;
[0032] The line array camera 1 and the one-dimensional scanning galvanometer 2 are set at a distance from the left and right; for example, the line array camera 1 and the one-dimensional scanning galvanometer 2 are fixed on a one-dimensional mobile platform; The laser receiving side of camera 1 is on the same side;
[0033] The one-dimensional scanning galvanometer 2 can emit a scanning laser line a within its scanning angle range, ...
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The present invention provides a high-speed line-scanning sensor, which includes a line-scan camera and a one-dimensional scanning galvanometer; the line-scan camera and the one-dimensional scanning galvanometer are arranged at a distance from left to right; The side is on the same side as the laser receiving side of the line array camera; the one-dimensional scanning galvanometer can emit scanning laser lines within its scanning angle range; the scanning laser line is reflected by the surface of the measured object at each scanning angle, and the reflected laser line is reflected by the line array camera imaging plane. Further, the high-speed line scan sensor scans one line at a time, and the one-dimensional scanning galvanometer can control the brightness of the laser point through encoding; one scan forms an encoding line pattern on the surface of the measured object; the present invention makes up for the existing line structured light sensor. deficiencies.
Description
technical field [0001] The invention relates to the technical field of machine vision three-dimensional measurement, in particular to a high-speed line scan sensor and a calibration method thereof. Background technique [0002] In recent years, with the development of industrial technology, the demand for the measurement of real-world three-dimensional structures has become more and more extensive. Among them, in terms of structured light, point structured light technology, line structured light technology and surface structured light technology have been mainly developed. The line structured light sensor is mainly composed of an area array camera and a line laser, and the pose relationship of the line laser plane in the camera coordinate system is determined through calibration, so as to realize three-dimensional measurement by triangulation. However, due to the limited shooting speed of the area array camera, the three-dimensional measurement of the line structured light ...
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IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 李晨李华阳张旭赵欢丁汉
Owner JIANGSU JITRI HUST INTELLIGENT EQUIP TECH CO LTD