摘要
温度的变化对导波传播有着很大的影响,但温度与其他因素对导波造成的复合误差却少有研究,而管道常常处于各种严峻环境下,对其进行温度变化与不同工况之间的复合误差研究十分有必要。本文就充水管道与温度变化之间的关系,提出了一种新的补偿思路,即用信号集匹配相近的基线信号,同时判断充水信息,再用基线拉伸法拉伸监测信号中的时域部分,最后减去相对应的最大残余幅值与充水偏差,完成信号的复合误差补偿。通过COMSOL模拟仿真分析该方法的可行性,同时设计实验验证效果,实验结果表明,进行补偿后的残余信号平均幅值比进行补偿后的残余信号平均幅值低约5 d B,即该方法能够有效的补偿由变温与充水共同造成的复合性误差。
Temperature changes have a great impact on guided wave propagation,but the composite error caused by temperature and other factors on guided waves is rarely studied,and pipelines are often in various severe environments.It is necessary to study the composite error between temperature changes and different working conditions.Regarding the relationship between the water-filled pipeline and the temperature change,a new compensation idea is proposed,that is,the signal set is used to match the similar baseline signal,and the water filling information is judged at the same time,then the time domain part of the monitoring signal is stretched by the baseline stretching method,and finally the corresponding maximum residual amplitude and the water-filling deviation are subtracted to complete the composite error compensation of the signal.The feasibility of the method was analyzed by COMSOL simulation,and experiments were designed to verify the effect.The experimental results show that the average amplitude of the residual signal after compensation is 5 dB lower than the average amplitude of the residual signal after compensation,that is,the method can effectively compensate for the composite error caused by temperature change and water filling.
作者
谢志峥
王衍学
王一
Xie Zhizheng;Wang Yanxue;Wang Yi(School of Mechanical-Electronic and Vehicle Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Faculty of Science and Technology,Beijing Normal University-Hong Kong Baptist University United International College,Zhuhai 519085,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2023年第8期173-181,共9页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(51875032,52275079)项目资助。
关键词
健康检测
超声导波
管道结构
温度补偿
充水管道
health screening
ultrasonic guided waves
piping structure
temperature compensation
filling pipes
作者简介
谢志峥,2021年于北京建筑大学获得学士学位,现为北京建筑大学硕士研究生,主要研究方向为故障诊断信号处理、超声导波检测。E-mail:genhzeix@163.com;通信作者:王衍学,2009年于西安交通大学获得博士学位,2010~2011年加拿大渥太华大学博士后,现为北京建筑大学教授、博导,主要研究方向为装备故障诊断与智能维护、剩余寿命与健康管理及信号处理与特征提取等。E-mail:wyx1999140@126.com;王一,就读于北京师范大学-香港浸会大学联合国际学院统计学专业,主要研究方向为数据挖掘、最大似然最优同步算法。E-mail:wy13660486708@163.com。
