Frontiers of Mechanical Engineering >
Edge detection of steel plates at high temperature using image measurement
Received date: 10 Jul 2008
Accepted date: 02 Sep 2008
Published date: 05 Mar 2009
Copyright
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.
Key words: thermal expansion; image measurement; edge detection; image calibration
Qiong Zhou , Qi An . Edge detection of steel plates at high temperature using image measurement[J]. Frontiers of Mechanical Engineering, 2009 , 4(1) : 77 -82 . DOI: 10.1007/s11465-009-0013-1
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