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Optical Engineering

Noncontact dynamic measurement of linear velocity using phototransistor array
Author(s): Lin Wang; Xiaofeng Meng; Guohua Wang
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Paper 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.

Paper Details

Date Published: 20 April 2012
PDF: 9 pages
Opt. Eng. 51(4) 043606 doi: 10.1117/1.OE.51.4.043606
Published in: Optical Engineering Volume 51, Issue 4
Show Author Affiliations
Lin Wang, BeiHang Univ. (China)
Xiaofeng Meng, BeiHang Univ. (China)
Guohua Wang, BeiHang Univ. (China)

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