[1]陈欢欢,董正琼.自适应去直流偏置的激光干涉振动测量[J].湖北工业大学学报,2019,34(5):21-24.
 CHEN Huanhuan,DONG Zhengqiong. An Adaptive De DC Bias Laser Interferometric Vibration Measurement Method[J].,2019,34(5):21-24.
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自适应去直流偏置的激光干涉振动测量()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
34卷
期数:
2019年第5期
页码:
21-24
栏目:
湖北工业大学学报
出版日期:
2019-10-30

文章信息/Info

Title:
 An Adaptive De DC Bias Laser Interferometric Vibration Measurement Method
文章编号:
1003-4684(2019)05-0021-04
作者:
陈欢欢 董正琼
湖北工业大学机械工程学院, 湖北 武汉 430068
Author(s):
CHEN Huanhuan DONG Zhengqiong
School of Mechanical Engineering, Hubei Univ. of Tech., Wuhan 430068,China
关键词:
激光干涉 去直流偏置 振动测量 自适应调节
Keywords:
laser interference dedc bias vibration measurement adaptive regulation
分类号:
TH741
文献标志码:
A
摘要:
针对单频激光干涉在位移测量中干涉信号易饱和的缺点,提出一种自动调整偏置的干涉信号光电转换方法,并应用在激光干涉测量振动微位移的系统中。从光路结构、硬件电路、软件算法三个方面对测量系统进行阐述。光路设计保证在光路结构简单紧凑的基础上产生宽度足够分辨的干涉条纹;设计电流放大与可自动消除偏置的二象限光电转换处理电路,并采用二分法调整DAC输出的算法,实现干涉信号偏置量的自适应调节。实验结果表明:该方法能够快速准确地自动调节偏置量到合适范围,满足干涉振动位移测量的要求。
Abstract:
Aiming at the disadvantage of interference signal saturation in displacement measurement by single frequency laser interferometry, an optoelectronic conversion method for automatically adjusting the bias of interference signal is proposed and applied to the system of measuring vibration microdisplacement by laser interferometry. The measurement system is described in detail from the following three aspects: optical structure, hardware circuit and software algorithm. Optical path design ensures that interference fringes with sufficient width resolution are generated on the basis of simple and compact optical structure. A twoquadrant photoelectric conversion circuit for current amplification and automatic elimination of offset interference fringe signal is designed, and an algorithm for adjusting DAC output by dichotomy is adopted to realize adaptive adjustment of offset of interference signal. The experimental results show that the method can quickly, accurately and automatically adjust the offset to a suitable range, and meet the requirements of interferometric vibration displacement measurement.

参考文献/References:

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备注/Memo

备注/Memo:
[收稿日期]2019-04-29
[第一作者] 陈欢欢(1991-), 男, 湖北咸宁人, 湖北工业大学硕士研究生,研究方向为仪器仪表工程专业
[通信作者] 董正琼(1987-), 女, 湖北潜江人, 华中科技大学博士研究生,研究方向为光学精密测量
更新日期/Last Update: 2019-11-21