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20 September 2002 Research on the Portable Photoelectric Railway Ruler
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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%.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xin Li, Jingwei Dong, Jing Liu, and Mingfa Feng "Research on the Portable Photoelectric Railway Ruler", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002);


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