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Gauge block calibration method for calibration of monocular line laser three-dimensional measurement module

A three-dimensional measurement and line laser technology, which is applied to measurement devices, optical devices, image data processing, etc., can solve the problems of difficult to trace measurement errors, high prices, and complicated steps, and achieve fast calibration speed, strong practicability, and calibration. high precision effect

Active Publication Date: 2020-11-20
XI AN JIAOTONG UNIV
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Problems solved by technology

For the calibration of the monocular laser measurement module, traditional methods, such as Chinese patents (application number 201910355395.X; application number 202010370860.X), often require camera calibration and laser plane fitting, the steps are cumbersome, and measurement errors are difficult to trace; For the calibration of the high-precision measurement module, a higher-precision camera calibration board is required to complete, and the high-precision camera calibration board is expensive and the cost is high

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  • Gauge block calibration method for calibration of monocular line laser three-dimensional measurement module
  • Gauge block calibration method for calibration of monocular line laser three-dimensional measurement module
  • Gauge block calibration method for calibration of monocular line laser three-dimensional measurement module

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[0025] The technical scheme of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. The described embodiments are only part of the present invention, and based on the embodiments, those skilled in the art can make All other obtained embodiments belong to the protection scope of the present invention.

[0026] Such as figure 1 As shown, a gauge block calibration method for the calibration of the monocular line laser three-dimensional measurement module uses a cuboid standard block as a gauge block to make a standard data set, including the following steps:

[0027] Step 1: Select the gauge block group, determine its measurement range according to the usage scene of the measurement module, and determine the size of the gauge block according to the measurement range. The gauge block size should be smaller than the camera field of view, and the combined height of the gauge block group should be as full ...

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Abstract

A gauge block calibration method for calibration of a monocular line laser three-dimensional measurement module comprises the following steps: making a standard data set by using a long gauge block, and firstly selecting a gauge block group; shooting picture sets of the gauge block and the gauge block group by the measurement module to serve as a standard data set; performing Z-axis calibration and Y-axis calibration; and finally, evaluating a calibration error according to a fitting result. The method greatly reduces the calibration cost, has the advantages of simple operation, few calibration steps, high calibration speed, high calibration precision, high practicability and the like, and is expected to be applied to the industrial field.

Description

technical field [0001] The invention relates to the technical field of monocular line laser measurement, in particular to a gauge block calibration method for calibration of a monocular line laser three-dimensional measurement module. Background technique [0002] Monocular line laser measurement technology is a non-contact three-dimensional measurement method, which has the advantages of high measurement point density, strong anti-interference ability, fast measurement speed, good scalability, and high precision. be widely used. [0003] The monocular line laser measurement system consists of a monocular line laser measurement module and a motion module. The monocular line laser measurement module is the core module for 3D measurement and point cloud acquisition, and its calibration accuracy directly determines the accuracy of the entire measurement system. For the calibration of the monocular laser measurement module, traditional methods, such as Chinese patents (applicat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G01B11/24
CPCG06T7/80G01B11/24G06T2207/10028G06T2207/20081G06T2207/20084
Inventor 梅雪松陈诚侯东祥
Owner XI AN JIAOTONG UNIV
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