Signal processing for determining water height in steam pipes with dynamic surface conditions

Shyh-Shiuh Lih; Hyeong Jae Lee; Yoseph Bar-Cohen

doi:10.1117/12.2084519

23 March 2015 Signal processing for determining water height in steam pipes with dynamic surface conditions

Shyh-Shiuh Lih, Hyeong Jae Lee, Yoseph Bar-Cohen

Proceedings Volume 9438, Health Monitoring of Structural and Biological Systems 2015; 943804 (2015) https://doi.org/10.1117/12.2084519
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

An enhanced signal processing method based on the filtered Hilbert envelope of the auto-correlation function of the wave signal has been developed to monitor the height of condensed water through the steel wall of steam pipes with dynamic surface conditions. The developed signal processing algorithm can also be used to estimate the thickness of the pipe to determine the cut-off frequency for the low pass filter frequency of the Hilbert Envelope. Testing and analysis results by using the developed technique for dynamic surface conditions are presented. A multiple array of transducers setup and methodology are proposed for both the pulse-echo and pitch-catch signals to monitor the fluctuation of the water height due to disturbance, water flow, and other anomaly conditions.

Citation Download Citation

Shyh-Shiuh Lih, Hyeong Jae Lee, and Yoseph Bar-Cohen "Signal processing for determining water height in steam pipes with dynamic surface conditions", Proc. SPIE 9438, Health Monitoring of Structural and Biological Systems 2015, 943804 (23 March 2015); https://doi.org/10.1117/12.2084519

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