Suggested flicker monitoring system based on wavelet transform

2013 ◽  
Author(s):  
A.F.A. El-Gawad
Keyword(s):  
Wavelet Transform ◽  
Monitoring System

Development of Novel Optical Fiber AE Sensor with Multi-Sensing Function

2006 ◽  
Vol 321-323 ◽  
pp. 71-76 ◽  
Author(s):  
Hideo Cho ◽  
Takashi Naruse ◽  
Takuma Matsuo ◽  
Mikio Takemoto
Keyword(s):  
Acoustic Emission ◽  
Wavelet Transform ◽  
Optical Fiber ◽  
Monitoring System ◽  
Continuous Wavelet Transform ◽  
Steel Plate ◽  
Continuous Wavelet ◽  
Arrival Times ◽  
Resonance Frequencies ◽  
Different Diameters

A novel optical fiber acoustic emission (AE) system with multi-sensing function in single long fiber was developed and utilized for the estimation of AE sources of model steel plate and jointed pipes. Multi-sensing function was achieved by dividing the single sensing fiber into several sensor portions with different resonance frequencies. The resonance frequencies were provided by winding the sensing fiber around the solid rods (sensor holders) with different diameters. The monitoring system with three sensors in a 10 m long fiber was demonstrated to detect three wave packets with different frequencies and correctly estimate the source locations of AEs from artificial (Nelson-Sue) sources on a 0.9 wide x 1.8 m long steel plate. Here the arrival times of AEs for the source location were determined by the continuous wavelet transform. Source locations on the steel plate were determined within a distance error of 53 mm. The system also makes the location of the pipe with damage possible.

On vibration signals analysis in Bridge Healthy Monitoring system using wavelet transform

2008 ◽  
Author(s):  
Yu Chongchong ◽  
Zhang Jia ◽  
Jia Shuo ◽  
Yang Yang ◽  
Tu Xuyan
Keyword(s):  
Wavelet Transform ◽  
Monitoring System ◽  
Vibration Signals

Design of wavelet transform based electrocardiogram monitoring system

2018 ◽  
Vol 80 ◽  
pp. 381-398 ◽  
Author(s):  
Ashish Kumar ◽  
Rama Komaragiri ◽  
Manjeet Kumar
Keyword(s):  
Wavelet Transform ◽  
Monitoring System ◽  
Electrocardiogram Monitoring
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