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Proceedings Paper

Research on the portable photoelectric railway ruler
Author(s): Xin Li; Jingwei Dong; Jing Liu; Mingfa Feng
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Paper Abstract

This paper presents a new method to test horizontal levelness of railway and gauge based on principle of photoelectric conversion. The paper emphasizes structure and operating principles of sensor and solves problems of the difficulty of zero calibration in measuring levelness and lowering power waste in portable instrument. Fundamental of whole design of the instrument is presented; error is analyzed; prototype is developed and calibrating experiment is accomplished. The result of experiment follows: prototype’s resolution power is 0.1mm, its non-linear error is less than 0.05%, its delaying error is less than 0.1%, its repeated error is less than 0.1%, its error coefficient of temperature stability is less than 0.015%, and precision of whole system is higher than 0.2%.

Paper Details

Date Published: 20 September 2002
PDF: 4 pages
Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.471661
Show Author Affiliations
Xin Li, Harbin Univ. of Science and Technology (China)
Jingwei Dong, Harbin Univ. of Science and Technology (China)
Jing Liu, Harbin Univ. of Science and Technology (China)
Mingfa Feng, Shenzhen Polytechnic (China)


Published in SPIE Proceedings Vol. 4927:
Optical Design and Testing
Zhicheng Weng; Jose M. Sasian; Yongtian Wang, Editor(s)

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