Application of laser lock—in imaging in rail wear measurement

WU Ke-qing; YU Xue-cai; WU Fu-hua; ZHANG Lei

LASER TECHNOLOGY > 2012 > 36(3): 353-356.

WU Ke-qing, YU Xue-cai, WU Fu-hua, ZHANG Lei. Application of laser lock—in imaging in rail wear measurement[J]. LASER TECHNOLOGY, 2012, 36(3): 353-356.

Citation:

WU Ke-qing, YU Xue-cai, WU Fu-hua, ZHANG Lei. Application of laser lock—in imaging in rail wear measurement[J]. LASER TECHNOLOGY, 2012, 36(3): 353-356.

Citation:

WU Ke-qing, YU Xue-cai, WU Fu-hua, ZHANG Lei. Application of laser lock—in imaging in rail wear measurement[J]. LASER TECHNOLOGY, 2012, 36(3): 353-356.

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Application of laser lock—in imaging in rail wear measurement

Department of Optical Engineering, School of Physical Electronics, University of Electronic Science & Technology of China, Chengdu 610054, China

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Received Date: July 25, 2011
Revised Date: September 13, 2011
Published Date: May 24, 2012

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Abstract

When the rail wear measurement is carried out in the wild,the interference from outside strong sunlight is inevitable.In order to eliminate the interference effect of sunlight effectively,a laser lock-in imaging technology was utilized.An external controlling circuit triggered the lasers and CCD image acquisition synchronously,and high quality image was achieved by means of laser lock-in imaging method.Lots of experiments verified that laser lock-in imaging makes the output of the rail wear more stable and adapt to a wide range interference of outside complicated background light.Experimental results show that laser lock-in imaging can guarantee stability of the measurement system,fundamentally eliminating the random measurement errors.
- laser technique,
- background light,
- lock-in imaging,
- rail wear

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