WAVELET ANALYSIS OF VORTEX SIGNAL

摘要：

Vortex signal is a kind of single frequency sine wave signal which is often noised. Comparing with the algorithms of time-frequency analysis, Wavelet analysis method is perfected in process of filtering and frequency detecting .This paper uses wavelet analysis method to denoise and detect both simulation signal and vortex signal, the symletA wavelet is selected to be the original wavelet; the number of decomposition levels is decided by ratio of approximation coefficients standard deviation and detail coefficients standard deviation; the frequency is detected by the new peak search method based on mathematical statistics. The final results show that using wavelet analysis method, vortex signal frequency can be detected almost up to the theoretical low limit of vortex flowmeter.

关键词： Wavelet analysis Decomposition levels Mathematics statistics Vortez

作者: HONG-JUN SUN WEI-JIE QU

作者单位: College of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China

会议类型: 国际会议

会议名称: 2009 International Conference on Machine Learning and Cybernetics(2009机器学习与控制论国际会议)

会议地点: 保定

会议语种:英文

页码: 1628-1633

在线出版日期: 2009-07-12（万方平台首次上网日期，不代表论文的发表时间）