An Orientation Method for Ultrasonic Linear Array Signals and its Application

Abstract:

A new high-precision method to orient the ultrasonic linear array signals was proposed in this paper. First, the FastICA algorithm was used to de-noise the ultrasonic linear array signals; then the TCT algorithm is used to focus the ultrasonic linear array signals to greatest extent to cumulate the position information of broadband signals, the FastDOA is used to estimate the direction-of-arrival (DOA) of focused narrowband signals to speed up the calculation after focusing; Then, the application of partial discharge detection using this method was studied, the estimated accuracy of the method was simulated with different SNR(Signal to Noise Ratio) at first, the results show that the errors of DOA were about 2°;At last, the results from some experiments show that the errors were about 3.5°, which indicates that this estimation method is with a good accuracy.

• Periodical: Applied Mechanics and Materials (Volumes 513-517)
• Pages: 4396-4400
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.513-517.4396
• Online since: February 2014
• Authors: Qing Xie*, Feng Liao, Wei Tao Hu
• Keywords: De-Noising, Direction Finding, Focusing, Partial Discharge (PD), Ultrasonic Linear Array Signals

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