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9 December 2005 Double frequency of difference frequency signals for optical Doppler effect measuring velocity
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Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 60240G (2005) https://doi.org/10.1117/12.666820
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
Abstract
The mathematical model for measuring moving objects (including fluid body, rolled steel materials in the steel works, turbulent flow, vibration body, etc.) velocity or speed by non-contact method is established using light-wave Doppler effect in this paper. In terms of concrete conditions of different optical circuits, and with the correlated conditions substituted, it is easy to obtain the measurement velocity formulas related to optical circuits. An optical circuit layout of difference Doppler effect measuring velocity is suggested in this paper. The fine beam of light emitted by laser is divided into parallel two beam by spectroscope and mirror They are focused on the object point p by a condenser lens respectively. The object point p become a diffuse source. It scatter rays to every aspect. Some rays scattered by the diffuse source p are collected by a lens. Photoelectric detecter receive the lights collected by the lens. This optical circuit layout can realize the double frequency of difference frequency signals in a novel way.
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Xiufang Yang, Renkui Zhou, W. L. Wei, and Xiaoming Wang "Double frequency of difference frequency signals for optical Doppler effect measuring velocity", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 60240G (9 December 2005); https://doi.org/10.1117/12.666820
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