摘要
为了在对燃气非金属PE管道泄漏位置定位时有效提取燃气管道显著图,提高定位精度,提出基于时域叠加的燃气非金属PE管道泄漏位置定位方法。首先,结合机器视觉系统,通过图像频域对管道拍摄图像数据中的空间信息进行表征,提取出燃气管道显著图,实现对管道泄漏位置的范围标定;然后,通过对原始一维回波信号进行分解与重构处理,实现噪声信号的去除;最后,对输出信号的时域进行叠加,并对叠加程度进行判断,识别出管道泄漏位置。结果表明:采用提出的方法对燃气非金属PE管道泄漏位置进行定位时,相较于现有常用方法,其定位相对误差值明显较低,信号源相关系数为0.21和0.82时的定位误差均小于25 mm,定位精度较为理想。研究结果可以帮助定位燃气非金属PE管道泄漏位置,为燃气管道的维护、抢修以及防止事故发生提供重要依据。
In order to effectively extract prominent maps of gas pipelines and improve positioning accuracy in locating leakage locations of gas non-metallic PE pipelines,a gas non-metallic PE pipeline leakage location method based on time-domain superposition was proposed.Firstly,by combining the machine vision system,the spatial information in the pipeline captured image data was characterized through the image frequency domain,and a salient map of the gas pipeline was extracted to achieve range calibration of the pipeline leakage position;Then,by decomposing and reconstructing the original one-dimensional echo signal,the noise signal was removed;Finally,the time-domain of the output signal was superimposed and the degree of superposition was judged to identify the location of pipeline leakage.The results show that when using the proposed method to locate the leakage location of gas non-metallic PE pipelines,the relative positioning error value is significantly lower compared to existing commonly used methods.The positioning errors are less than 25 mm when the signal source correlation coefficients are 0.21 and 0.82,and the positioning accuracy is relatively ideal.The research results can help locate the leakage location of non-metallic PE gas pipelines,providing important basis for the maintenance,emergency repair,and prevention of accidents in gas pipelines.
作者
王巍
WANG Wei(Tianjin North China Geological Survey Bureau Nuclear Industry 247 Brigade,Tianjin 300000,China)
出处
《河北工业科技》
CAS
2024年第3期234-240,共7页
Hebei Journal of Industrial Science and Technology
基金
天津华北地质勘查局科研项目(HK2022-B33)。
关键词
供热与供燃气工程
时域叠加
燃气管道
定位方法
定位精度
管道泄漏位置
heating and gas supply engineering
time-domain superposition
gas pipeline
localization method
localization accuracy
pipeline leakage location
