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Multiple-sensor united calibration method

A joint calibration and multi-sensor technology, applied in the field of sensor calibration, can solve the problems of unable to measure the edge position and accurately reflect the position of the end face, etc., and achieve the effect of solving registration problems and expanding the range

Active Publication Date: 2013-03-20
TIANJIN UNIV
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Problems solved by technology

The end faces of these tiny structures are often surface features. Due to the reflection of the end face, the inclination of the end face, etc., the contour image collected by the existing multi-sensor calibration technology cannot accurately reflect the position of the end face, that is, the edge position of these structures cannot be accurately measured.

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] In order to realize the measurement and positioning of microstructures, expand the scope of practical applications, and meet the needs of practical applications, the embodiment of the present invention proposes a multi-sensor joint calibration method, which is described below for details:

[0039] 101: Calibrate camera parameters by using a round hole target;

[0040] 1) The round hole target is fixed, the camera is fixed on the motion mechanism and moves along the Y I Xiang and Z I Make a two-dimensional translational movement, take the center of the circular hole target as a feature point, and record the coordinates of the motion mechanism and the image plane coordinates of the feature point at each position;

[0041] see f...

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Abstract

The invention discloses a multiple-sensor united calibration method and relates to sensor calibration. The multiple-sensor united calibration method comprises the following steps: calibrating camera parameters through a circular hole target component; calibrating a contact-type measuring head through a standard ball; and united calibration of a camera and the contact-type measuring head. Measurement on geometric dimensioning and form and position errors of small structures can be achieved through data processing in the multiple-sensor united calibration method, ranges in practical application are enlarged, and demands in practical application are met.

Description

technical field [0001] The invention relates to sensor calibration, in particular to a multi-sensor joint calibration method. Background technique [0002] In multi-sensor systems, multi-sensor registration technology is one of the key technologies. The so-called registration refers to the process of converting information from different sensors into a common system, so that the system error caused by space-time calibration, coordinate system transformation, sensor's own position information offset and detection offset is minimized, and the control sensor The stability of the system ensures that subsequent multi-sensor data integration can be implemented correctly and effectively. In order to obtain the transformation relationship between the relative position and direction of each sensor coordinate system, joint calibration of multiple sensors is required. [0003] In the prior art, a plane calibration plate is usually used to calibrate the camera separately, and the diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00
Inventor 李醒飞谭文斌陈诚王星姚旺
Owner TIANJIN UNIV
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