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Line structured light vision measuring system complete calibrating method comprising scanning direction information

A scanning direction, line structured light technology, applied to the calibration field of online structured light vision systems

Active Publication Date: 2016-11-09
CHANGCHUN NORMAL UNIVERSITY
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Problems solved by technology

[0008] In order to solve the technical problem that the complete calibration method of the existing linear structured light vision measurement system can not only determine the parameters of the structured light vision system and determine the scanning direction vector, but also greatly improve the calibration accuracy of the vision measurement system and simplify the calibration process, this paper The invention provides a complete calibration method for a line-structured light vision measurement system that includes scanning direction information

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  • Line structured light vision measuring system complete calibrating method comprising scanning direction information
  • Line structured light vision measuring system complete calibrating method comprising scanning direction information
  • Line structured light vision measuring system complete calibrating method comprising scanning direction information

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Embodiment Construction

[0067] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0068] like Figure 9 to Figure 11 As shown, the complete calibration method of the line structured light visual measurement system including scanning direction information of the present invention includes the following steps:

[0069] Step 1: Establish a relative motion auxiliary calibration device based on a linear slide rail system that is approximately parallel to the long axis of the object to be scanned. With the help of this system, innovatively integrate the unique relative motion coordinate system conversion thinking of the present invention to achieve auxiliary determination to approximate a given scan direction vector

[0070] Establish the overall projection and shooting mechanism 1 based on the linear slide rail system and the relative motion auxiliary calibration device based on the linear slide rail system based on the rectangular projectio...

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Abstract

The invention discloses a line structured light vision measuring system complete calibrating method comprising scanning direction information, and belongs to the line structured light vision system calibrating method field. The line structured light vision measuring system complete calibrating method comprises the steps that based on a help of a relative motion calibrating device of a straight line slide rail system, by combining with a motion coordinate system conversion thinking, a routine light plane calibrating process is directly used to acquire a plurality of opposite relative motion calibrating images comprising light strip position information and scanning direction information at the same time by one time, and therefore calibrating steps are simplified, and at the same time, a calculation amount required by solving a structured light plane space equation of a calculation system is greatly reduced. The line structured light vision measuring system complete calibrating method is advantageous in that a scanning direction vector equation is solved and fitted accurately, and the scanning direction can be any direction, and at last, the completer line structured light vision measuring system calibrating method comprising a vector scanning step is defined and determined again. The line structured light vision measuring system complete calibrating method has double effects of improving calibrating efficiency and reducing calibrating errors.

Description

technical field [0001] The invention belongs to the field of calibration methods for a line structured light vision system, in particular to a complete calibration method for a line structured light vision measurement system including scanning direction information. Background technique [0002] Vision measurement technology can well adapt to the new standards and requirements of modern industry for the detection of workpiece shape and size. It is a non-contact shape detection method with both precision and efficiency. The line structured light vision system is one of the typical representatives of visual measurement technology. Its basic principle is to use a linear laser to project a laser plane with a completely known spatial attitude on the space object to be detected, form a projected light strip on the surface of the object, and make it The projected light bar moves along a known scanning direction, and a high-precision camera takes multiple pictures at different posit...

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Application Information

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IPC IPC(8): G01B11/25
CPCG01B11/2518G01B11/254
Inventor 孙秋成赵志欣于繁华刘仁云秦培春何旭于欣扬
Owner CHANGCHUN NORMAL UNIVERSITY
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