场指纹技术(Field Signature Method,FSM)是一种广泛应用于金属管道缺陷检测的无损检测技术,能够高精度检测腐蚀缺陷,但对于危险系数更高的裂纹缺陷则检测能力不足。提出了一种多向场指纹法(Multi-direction Field Signature Method,MDFSM),通过向被测管道施加3个方向的激励,可以保证更多角度的裂纹缺陷能被有效检测到,比对后选取最强的1组信号求解裂纹深度。仿真和实验结果表明,所提出的MDFSM能够显著提升裂纹深度的检测精度。
Abstract
Field signature method (FSM) is a non-destructive testing technology widely used in metal pipeline defect detection. It can detect corrosion defects with high accuracy;but its detection capability for crack defects with higher risk coefficient is insufficient. In this paper,a multi-direction field signature method (MDFSM) is proposed. By applying multi-direction excitation to the tested pipeline,crack defects at more angles can be effectively detected,and the strongest set of signals is selected to solve the crack depth. Simulation and experiments show that the proposed MDFSM significantly improves the accuracy of detecting crack depth.
关键词
缺陷检测 /
金属管道 /
腐蚀 /
裂纹 /
多向场指纹法 /
激励电流
Key words
defect detection /
metal pipeline /
corrosion /
crack /
MDFSM /
excitation current
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参考文献
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基金
青海省自然科学基金资助项目(2018-ZJ-719);四川省科技厅科技创新创业苗子工程(2021JDRC0090)
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