| Popis: |
Measurement signal of Michelson interferometer is considered as a cosine signal in low-frequency band limited. After that, we place our eyes on how to utilize wavelet trans- form to analyze and signal process the carrier signal and the interfering signal. In the low-frequency, the Continuous Wavelet Transformation time window automatically widened which depended on the different requirements and the different sampling module. The high-frequency can be adaptively narrowed in accordance with different sample modules. The characteristics of utilization Morlet wavelet transformation (a method of Gabor wavelet transform) owns huge computing capacity, slightly higher complexity .To the discrete signals, we take use of Mallat wavelet transformation to deal with the signal in the Discrete Continuous Transformation, to reduce computing complexity under without lowering the accuracy of measurement systems. At the same time, improve the response speed, and work out the best signal interference envelope fitting curve, to decrease the positioning error of zero-light-path difference. To achieve not to enhance the interfere measurement accuracy, as far as possibly, improve the measuring speed under different occasions. |
