基于小波包去噪与LSTM的超声飞渡时间测量方法
Ultrasonic transit time measurement method based on wavelet packet denoising and LSTM
李嘉成 1汪达 2陈立玮 1戴静 3周新志1
作者信息
- 1. 四川大学电子信息学院,成都 610065
- 2. 中核核电运行管理有限公司,嘉兴 314000
- 3. 北京康安森仪表技术有限公司,北京 100107
- 折叠
摘要
超声流量计通常采用时差法进行流量测量,但面对锅炉等环境噪声较强的复杂环境,传统的阈值法和互相关法等方法的流量测量精度会受到极大影响.提出一种基于小波包去噪与LSTM的超声飞渡时间测量方法,利用实际锅炉换热管道中采集到的超声信号数据开展实验,结果表明文章所提测量模型相较于传统的GCC、QCC等算法,在超声飞渡时间测量准确率方面提高了20.03%以上,平均绝对误差方面至少降低了0.1860,均方根误差方面至少降低了0.2829,提高了锅炉管道流量的测量精度.
Abstract
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.
关键词
超声流量计/时差法/小波包去噪/LSTMKey words
ultrasonic flowmeter/time difference method/wavelet packet denoising/LSTM引用本文复制引用
基金项目
核反应堆系统设计技术重点实验室基金项目(KFKT-05-FW-HT-20220019)
出版年
2024
NETL
NSTL
万方数据