| 小波分层法在激光多普勒测速信号中的应用 |
| |
| 引用本文： | 赵洪博,张达,杨健坤,孟繁萃,张明.小波分层法在激光多普勒测速信号中的应用[J].激光技术,2019,43(1):103-108. |
| |
| 作者姓名： | 赵洪博 张达 杨健坤 孟繁萃 张明 |
| |
| 作者单位： | 青岛科技大学 机电工程学院,青岛,266061;青岛科技大学 自动化与电子工程学院,青岛,266061 |
| |
| 摘 要： | 为了降低激光多普勒测速信号中的噪声,采用在仿真激光多普勒测速信号中加入高斯白噪的方法,通过小波分层后高频系数置零法和小波阈值去噪法2种方法进行仿真去噪,进行了仿真分析及实验验证。结果表明,小波分层后高频系数置零法能够提高信噪比获得图形光滑的信号,达到较理想的去噪效果。这一结果对提高在激光多普勒测速系统信号检测应用中的准确性是有帮助的。
|
| 关 键 词： | 激光技术 最优小波系数 高频系数置零 信噪比 |
| 收稿时间： | 2018-03-15 |
Application of wavelet layered method for laser Doppler velocimetry signal |
| |
| ZHAO Hongbo,ZHANG Da,YANG Jiankun,MENG Fancui,ZHANG Ming.Application of wavelet layered method for laser Doppler velocimetry signal[J].Laser Technology,2019,43(1):103-108. |
| |
| Authors: | ZHAO Hongbo ZHANG Da YANG Jiankun MENG Fancui ZHANG Ming |
| |
| Affiliation: | (Mechanical and Electrical Engineering College, Qingdao University of Science and Technology, Qingdao 266061, China;Automation and Eleetrical Engineering College, Qingdao University of Science and Technology, Qingdao 266061, China) |
| |
| Abstract: | In order to reduce the noise in laser Doppler velocimetry signal, the method that Gaussian white noise was added to the simulated laser Doppler velocimetry signal was used. The high frequency coefficient zeroing method and the wavelet threshold denoising method were adopted for denoising after wavelet layering. The simulation analysis and experimental verification were carried out. The results show that, the high frequency coefficient zeroing method after wavelet layering can improve the signal-to-noise rate to get smooth graph signals and achieve an ideal denoising effect. The result is helpful to improve the accuracy of signal detection in laser Doppler velocimetry system. |
| |
| Keywords: | laser technique optimal wavelet coefficient zero-denoising high-frequency coefficient signal-to-noise ratio |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《激光技术》浏览原始摘要信息 |
|
点击此处可从《激光技术》下载全文 |
|
