| 正弦相位调制位移干涉测量技术中调制频率的优化选择 |
| |
| 引用本文： | 刘英明,王向朝.正弦相位调制位移干涉测量技术中调制频率的优化选择[J].中国激光,2006,33(11):574-1579. |
| |
| 作者姓名： | 刘英明 王向朝 |
| |
| 作者单位： | 1. 中国科学院上海光学精密机械研究所信息光学实验室,上海,201800;中国科学院研究生院,北京,100039
2. 中国科学院上海光学精密机械研究所信息光学实验室,上海,201800 |
| |
| 基金项目： | 国家自然科学基金;上海市科委国际合作计划项目 |
| |
| 摘 要： | 针对正弦相位调制(SPM)干涉测量技术用于位移测量时,调制频率对干涉信号相位解调的影响,提出一种调制频率的优化选择依据.通过对干涉信号的频谱进行分析,发现当被测位移幅度较小时,较小的调制频率即可满足相位解调的要求;而当被测位移较大时,必须相应地增大调制频率,才能获得比较准确的测量结果.模拟计算以及实验结果表明,被测位移信号的幅度每增大四分之一测量光源波长,调制频率需要相应增大4倍于被测信号频率的大小,才能满足正弦相位调制位移干涉测量技术信号处理的需要.
|
| 关 键 词： | 测量 正弦相位调制 调制频率 频谱分析 |
| 文章编号： | 0258-7025（2006）11-157406 |
| 收稿时间： | 2006-03-09 |
| 修稿时间： | 2006-04-28 |
Analysis of Modulation Frequency in Sinusoidal Phase Modulating Interferometry for Displacement Measurement |
| |
| LIU Ying-ming,WANG Xiang-zhao.Analysis of Modulation Frequency in Sinusoidal Phase Modulating Interferometry for Displacement Measurement[J].Chinese Journal of Lasers,2006,33(11):574-1579. |
| |
| Authors: | LIU Ying-ming WANG Xiang-zhao |
| |
| Affiliation: | 1 Information Optics Laboratory, Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800, China ;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
| |
| Abstract: | The effect of modulation frequency on phase demodulation is analyzed in sinusoidal phase modulating (SPM) interferometry for displacement measurement. A rule for selecting modulation frequency is presented. The spectrum of interference signal is analyzed. It is found that when the displacement measurement range is narrow, small modulation frequency can meet the phase demodulation need; when the displacement measurement range is enlarged, modulation frequency has to be increased. Simulated data and experimental results indicate that with an λ/4 increase in amplitude of vibration to be measured, modulation frequency is required to increase to four times as frequency of vibration to be measured, where λ is the wavelength of light source. |
| |
| Keywords: | measurement sinusoidal phase-modulating modulation frequency spectral analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
