Single mode signal enhancement for defect location in pipe using AE

Mohd Razali, Nuraisah Asmida (2021) Single mode signal enhancement for defect location in pipe using AE. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Acoustic Emission (AE) is very promising technique with sensors offer high sensitivity to instantly spot any corrosion defect in pipe. A research study of single mode signal enhancement for defect location in pipe using Acoustic Emission (AE) through simulation has been carried out. The straight pipe model was designed with three different defect location and equipped with five sensors on the left and right side. Considering the problem of complex wave propagation, the signal for defect location in pipe can be affected and difficult to analyse. Therefore, this research study aimed to apply linear source location through the application of multiple sensors and perform digital signal processing for enhancement of the recorded signal for defect location in pipe. The limitation of this research study is the simulation model on straight pipe with corrosion defects and digital signal processing in LabVIEW software for signal enhancement. This research study starts with input signal data of three different frequencies from SCILAB software is imported to the simulation. After simulation is finished, the data is exported in text file and inserted in LabVIEW software for signal enhancement with single mode signal enhancement algorithm. Four conditions used in this signal enhancement to improve the quality of signal level. The linear source location and the percentage error on effect of signal enhancement on data location is calculated as a result. The estimated location between the sensor and the corrosion point was calculated using the signal enhancement result. When compared with the actual location of the simulated model, the low percentage error obtained at almost all conditions when signal enhancement applied proving the efficacy of this method in precisely locating corrosion defects, thus providing an innovated solution for pipe defect location.

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