Real Time Velocity Measurement with All-fiber Self-mixing Speckle System

被引：5

作者：

Duan, Ali ^{[1
]}

Han, Daofu ^{[1
]}

Ma, Li ^{[1
]}

机构：

[1] Nanchang Univ, Phys Expt Ctr, Nanchang 330031, Peoples R China

来源：

2011 INTERNATIONAL CONFERENCE ON PHYSICS SCIENCE AND TECHNOLOGY (ICPST) | 2011年 / 22卷

关键词：

real time velocity measurement; erbium-doped fiber laser; energy density; self-mixing speckle; LASER-DIODE; VELOCIMETER;

D O I：

10.1016/j.phpro.2011.11.071

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A novel method for real time velocity measurement is proposed. All-fiber laser measurement system is built by an erbium-doped fiber amplifier (EDFA). The measuring principle is based on laser self-mixing speckle, modulations of laser output caused by the optical feedback from an outer moving object. The generation of speckle signal is theoretically analyzed and experimentally obtained. A Labview programme is developed for waveform acquisition, noise reduction and numeric calculation. The signal processing shows a linear relationship between the energy density of speckle signal and the velocity of the moving object. In the experiments of real time velocity measurement by a rotating aluminum plate, we obtained measurement error less than 4.1% in the range of velocity from 234 to 508 mm/s. The study indicates that the all-fiber self-mixing speckle system can be applied in remote velocity sensing and measurement. (C) 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of Garry Lee.

引用

页码：455 / 463

页数：9