Noncontact dynamic measurement of linear velocity using phototransistor array

Lin Wang; Xiaofeng Meng; Guohua Wang

doi:10.1117/1.OE.51.4.043606

20 April 2012 Noncontact dynamic measurement of linear velocity using phototransistor array

Lin Wang, Xiaofeng Meng, Guohua Wang

Author Affiliations +

Optical Engineering, Vol. 51, Issue 4, 043606 (April 2012). https://doi.org/10.1117/1.OE.51.4.043606

Abstract

An innovative, noncontact, dynamic method is proposed for linear velocity measurement based on phototransistor array. According to the method, an optoelectronic measurement system has been established with three parts: a stable linear laser, fixed on the moving target, is applied as the optical signal emitting unit; a phototransistor array with complex programmable logic devices, positioned parallel to the moving direction and face to face with the laser, is designed as optical signal detecting unit; high-speed data picking cards and a signal processing software are used as the signal acquisition and processing unit. The single cycle frequency measurement theory and the piecewise polynomial fitting are applied in the instrumentation. The effectiveness and reliability of the measurement was demonstrated through three example linear movements.

Citation Download Citation

Lin Wang, Xiaofeng Meng, and Guohua Wang "Noncontact dynamic measurement of linear velocity using phototransistor array," Optical Engineering 51(4), 043606 (20 April 2012). https://doi.org/10.1117/1.OE.51.4.043606

Published: 20 April 2012

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