Research on the Influence of Excitation Parameters on Butterfly Diagram of Q235 Steel's Incremental Permeability
Incremental permeability detection is a new electromagnetic non-destructive testing method,which can realize the quantitative or qualitative detection and evaluation of many properties of ferromagnetic materials.Since the characteristic value of the incremental permeability signal is easily affected by electromagnetic,different excitation conditions will affect the final evaluation result,and there are no studies to analyze the influence of excitation parameters on the butterfly chart of the incremental permeability.By conducting incremental permeability experiments with changes in various excitation parameters,the frequency,intensity,superposition direction of high-frequency/low-frequency magnetization and the influence of the lift-off effect were analyzed,and the change law of the incremental permeability under different excitation parameters was explored.The results showed that the intensity,frequency,direction and lift-off effect of the high-frequency/low-frequency magnetic field had different effects on the incremental permeability signal and the characteristic value of the butterfly diagram.It lays a theoretical foundation for signal analysis and industrial application of incremental permeability detection method.
NETL
NSTL
万方数据
维普
