Ultrasonic transit time measurement method based on wavelet packet denoising and LSTM
Ultrasonic flowmeters commonly use the transit-time method for flow measurement.However,in complex environ-ments with strong environmental noise such as boilers,traditional methods like threshold and correlation-based methods are greatly affected in terms of flow measurement accuracy.This paper proposes a method for ultrasonic time-of-flight measurement based on wavelet packet denoising and LSTM.Experimental data collected from ultrasonic signals in actual boiler heat exchange pipelines are utilized.The results indicate that the proposed measurement model improves the accuracy of ultrasonic time-of-flight measurement by over 20.03%compared to traditional algorithms like GCC and QCC.The mean absolute error decreased by at least 0.1860,and the root mean square error decreased by at least 0.2829,thereby enhancing the measurement accuracy of boiler pipeline flow rates.
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