Wavelets and wavelet packets applied to detect and characterize transient alarm signals from termites

被引：19
|
作者：
Jose Gonzalez de la Rosa, Juan
Lloret, I.
Moreno, A.
Puntonet, C. G.
Gorriz, J. M.
机构：
[1] Univ Cadiz, Res Grp TIC168, EPSA, Elect Area, E-11202 Cadiz, Spain
[2] Univ Cordoba, Dept Elect, E-14071 Cordoba, Spain
[3] Univ Granada, Dept Architecture & Comp Technol, E-18071 Granada, Spain
[4] Univ Granada, Dept Signal Proc, E-18071 Granada, Spain
来源：
MEASUREMENT | 2006年 / 39卷 / 06期
关键词：
acoustic emission; seismic accelerometer; termite characterization; transient detection; ultrasonics; vibratory signal; wavelets; wavelet packets;
D O I：
10.1016/j.measurement.2005.11.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper we show the possibility of using wavelets and wavelet packets to detect and characterize alarm signals produced by termites. A set of synthetics have been modelled by mixing the real acquired transients with computer generated noise processes. Identification has been performed by means of analyzing the impulse responses of three sensors undergoing natural excitations. De-noising exhibits good performance up to SNR = -30 dB, in the presence of white gaussian noise. The test can be extended to similar vibratory or acoustic signals resulting from impulse responses. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：553 / 564
页数：12
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