基于超声波技术的城市地下天然气管道腐蚀缺陷检测方法

针对城市天然气管道腐蚀缺陷问题，提出基于超声波技术的城市地下天然气管道腐蚀缺陷检测方法。首先，采用超声波检测装置采集城市地下天然气管道腐蚀缺陷信号，并采用主成分分析法提取腐蚀缺陷信号特征；然后，将特征作为支持向量机输入，采用粒子群算法优化支持向量机参数，构建城市地下天然气管道腐蚀缺陷检测模型；最后，进行了实例分析。结果验证:本文方法的城市地下天然气管道腐蚀缺陷检测精度高，且检测时间短，可提升城市地下天然气管道腐蚀缺陷检测效果。

Method for detecting corrosion defects of urban underground natural gas pipelines based on ultrasonic technology

Aiming at the problem of corrosion defects in urban natural gas pipelines，a method for detecting corrosion defects in urban underground natural gas pipelines based on ultrasonic technology was proposed.First，the ultrasonic detection device was used to collect the corrosion defect signal of the urban underground natural gas pipeline，and the principal component analysis method was used to extract the corrosion defect signal characteristics；then，the characteristics were input as the support vector machine，and the particle swarm algorithm was used to optimize the parameters of the support vector machine to construct the urban underground the corrosion defect detection model of natural gas pipeline；finally，a case analysis was carried out.Result verification:the detection accuracy of urban underground natural gas pipeline corrosion defects in this method was high，and the detection time was short，which could improve the detection effect of urban underground natural gas pipeline corrosion defects.