Based on Wavelet Thresholding Denoising Method in Oil Pipeline Leakage Monitoring and Positioning System

How to eliminate the noise in the pipeline has drawn increasing attention. This paper investigates the wavelet transform and the principle and method of the noise reduction based on wavelet transform, chooses the threshold noise reduction, sqtwolog, heursure, minimaxi and rigrsure 4 kinds of threshold selection method is compared qualitatively and quantitatively. Simulation results show that, using wavelet threshold method and select the sqtwolog threshold method can effectively remove the noise, it can greatly reduced the level of detection of leakage points of error.