Application of harmonic wavelet to filtering of rockbolt detecting signal

Yucheng Zhao; Hongyan Liu; Jiyan Wang; Xiexing Miao

doi:10.1117/12.839271

25 August 2009 Application of harmonic wavelet to filtering of rockbolt detecting signal

Yucheng Zhao, Hongyan Liu, Jiyan Wang, Xiexing Miao

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73753W (2009) https://doi.org/10.1117/12.839271
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

Harmonic wavelet had explicit functional expression, flexible time-frequency division, simple transforming algorithm and a finer frequency refinement function than the others wavelet. In this paper based on frequency distributing characteristic of nondestructive testing signal from rockbolt supporting system, the discrete harmonic wavelet transforming theory was used to get rid of the lower and higher frequency signal from the initial signal. Meanwhile, the reconstruction algorithm of harmonic wavelet was brought forward to gain the signal without the unnecessary bandwidth signals. Finally, a numerical signal and real signal which can demonstrate superiority of harmonic wavelet in filtering are presented, and the transforming result shows that it would make the system run more precise and stably in the detecting to the quality of rockbolt supporting system.

Citation Download Citation

Yucheng Zhao, Hongyan Liu, Jiyan Wang, and Xiexing Miao "Application of harmonic wavelet to filtering of rockbolt detecting signal", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73753W (25 August 2009); https://doi.org/10.1117/12.839271

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KEYWORDS

Wavelets

Electronic filtering

Signal detection

Detection theory

Filtering (signal processing)

Wavelet transforms

Nondestructive evaluation

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