Application of Wavelet Transformation in Vortex Flowmeter Signal Processing

摘要

The vortex flowmeter is widely used because of its many advantages. However, it is easily influenced by the noises caused by pipe vibrations and fluid turbulence. The processing circuits in the vortex flowmeter are unable to ensure the measuring accuracy in the industrial fields and are unable to measure small flows accurately. The digital processing methods can complement the drawbacks of the traditional methods. This paper adopted the wavelet transformation to the vortex flowmeter signal processing. In the paper, the basic principles of wavelet transformation and the signal processing based on the discrete wavelet transformation are given, the adjusting methods of center frequency of filter are studied, and the processing procedure and simulation result are carried out. The result shows that the wavelet transformation can effectively reduce the noise, and it’s an effective method on vortex flowmeter signal processing.