一种基于场指纹法的金属管道小腐蚀坑的求解方法

发布时间：2018-03-11 20:37

本文选题：场指纹法　切入点：腐蚀监测　出处：《四川大学学报(工程科学版)》2015年01期 　论文类型：期刊论文

【摘要】：针对场指纹法(FSM)对小腐蚀坑检测精度偏低的问题,根据小腐蚀坑会对被测管道的电流分布产生影响的现象,提出一种细分的电阻链网络模型,利用主辅电压和细分电阻网络的特定关系来准确求解小腐蚀坑,并且分析发现不同位置、不同深度和不同直径的小腐蚀坑对主辅电压有着特定的影响,进而提出了一种利用主辅电压来准确求解小腐蚀坑的方法。该方法的本质在于引入了多个已知参量,从而可以求解出多参量的小腐蚀坑。理论分析和实验表明,提出的求解小腐蚀坑的方法能够有效提高小腐蚀坑的检测精度,发展并完善了FSM方法。
[Abstract]:In order to solve the problem of low accuracy of FSM-based field fingerprint detection for small corrosion pits, a subdivision resistive chain network model is proposed according to the phenomenon that the small corrosion pits will affect the current distribution of the pipeline under test. By using the specific relationship between the main-auxiliary voltage and the subdivision resistance network, the small corrosion pits with different positions, different depths and different diameters are found to have a specific influence on the main and auxiliary voltages. Furthermore, a method is proposed to solve the small corrosion pits accurately by using the main and auxiliary voltage. The essence of this method is to introduce several known parameters to solve the small corrosion pits with multiple parameters. The theoretical analysis and experimental results show that, The proposed method can effectively improve the detection accuracy of the small corrosion pit and develop and improve the FSM method.
【作者单位】：四川大学制造科学与工程学院;
【基金】：国家自然科学基金资助项目(61271329) 四川省科技支撑计划资助项目(2012GZ0094)
【分类号】：TG172

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