Application of laser lock—in imaging in rail wear measurement
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Department of Optical Engineering, School of Physical Electronics, University of Electronic Science & Technology of China, Chengdu 610054, China
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Corresponding author:
YU Xue-cai, x.yu3333@gmail.com
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Received Date:
2011-07-26
Accepted Date:
2011-09-14
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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.
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