Singularity detection of deformation signal
QU Guo-qing · Journal of Shandong University of Technology · 2008
The observed signal of deformation monitoring includes noise,deformation signal and abrupt changing signal(singularity signal).Wavelet transform modulus maximum at singular points of signal keeps conctant with the increased scale but the value at white noise points will decrease.Based on the different behaviors between the signal and the noise,how to choose wavelet basis and the feature of singularity point being transformed by convolution wavelet are analyzed.The method for positioning the transient point and detecting the degree of singularity,and,the method for determing the intensity of abrupt change are povided in the paper.