a novel measurement method for transient detection based in wavelets entropy and the spectral kurtosis an application to vibrations and acoustic emission signals from termite activity论文.pdf

Measurement 68 (2015) 58–69 Contents lists available at ScienceDirect Measurement journal homepage: /locate/measurement A novel measurement method for transient detection based in wavelets entropy and the spectral kurtosis: An application to vibrations and acoustic emission signals from termite activity q Juan José González de la Rosa ⇑,1, Agustín Agüera Pérez, José Carlos Palomares Salas, José María Sierra Fernández Research Group PAIDI-TIC-168, Computational Instrumentation and Industrial Electronics (ICEI), Spain University of Cádiz, Area of Electronics, EPSA, Av. Ramón Puyol S/N, E-11202 Algeciras, Cádiz, Spain a r t i c l e i n f o a b s t r a c t Article history: This paper presents a novel non-destructive method for termite detection that uses the Received 31 December 2013 entropy of the continuous wavelet transform of the acoustic emission signals as an uncer- Received in revised form 17 February 2015 tainty measurement, to achieve selective frequency separation in complex impulsive-like Accepted 19 February 2015 noisy scenarios, with the aid of the spectral kurtosis as a validating tool. The goal consists Available online 28 February 2015 of detecting relevant frequencies, by looking up the minima in the curve associated to the entropy of the difference between the raw data and the wavelet-based reconstructed ver- Keywords: sion. By measuring the signal’s uncertainty, the scales corresponding to the entropy Acoustic Emission (AE)