2、0041)摘 要:在油气管道腐蚀检测领域,场指纹法(field signature method,FSM)管道腐蚀在线监测技术是一种运用较为普遍的技术。然而传统的场指纹技术还存在诸多不足,例如极易受到系统漂移的干扰而导致监测结果出现较大偏差;需要数十安培的激励电流,电源模块易损坏,只能测量相对壁厚减薄,参考板与被测管道之间的温度差会引入很大的测量误差等。作者在有限元仿真的基础上,提出了一种多频交流场指纹技术(multi-frequency altern-ative current field s
5、tureMethodGANFangji1,YUMin2,XUTao3,LIAOJunbi1(1.School of Manufacturing Sci. and Eng., Sichuan Univ., Chengdu 610065, China; 2.Zigong Electric Power Supply Co., State Grid Sichuan Electric PowerCo., Zigong 643000, China; 3.Sci. and Technol. on Reacto
6、r System Design Technol. Lab., Nuclear Power Inst. of China, Chengdu 610041, China)Abstract: Field signature method (FSM) is a common monitoring technology for metal pipeline corrosion. However, there are a lot of shortcom-ings in FSM Technology such
7、 as the measurement results are easily disturbed by the drift and the temperature difference between the referenceplate and the measured pipe will lead to a large measurement errors. Multi-frequency alternative current field signature method (MACFSM)
8、 is in-troduced to assess the wall thickness of metal pipeline based on finite element simulation. Multi-excitation current with a series of frequency fromhigh to low is injected into the measured metal pipe, and penetration depth will increase with