Edge detection of steel plates at high temperature using image measurement

2009年第4卷第1期

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《机械工程前沿（英文）》 >> 2009年第4卷第1期 doi: 10.1007/s11465-009-0013-1

Edge detection of steel plates at high temperature using image measurement

School of Mechanical and Power Engineering of East China University of Science and Technology, Shanghai 200237, China

发布日期： 2009-03-05

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摘要

An edge detection method for the measurement of steel plate’s thermal expansion is proposed in this paper, where the shrinkage of a steel plate is measured when temperature drops. First, images are picked up by an imaging system; a method of regional edge detection based on grayscales’ sudden change is then applied to detect the edges of the steel plate; finally, pixel coordinates of the edge position are transformed to physical coordinates through calibration parameters. The experiment shows that the real-time, high precision, and non-contact measurement of the steel plate’s edge position under high temperature can be realized using the imaging measurement method established in this paper.

关键词

thermal expansion ; image measurement ; edge detection ; image calibration