Eddy current testing is one of the common nondestructive testing for strain in metal structure.It plays an irreplaceable role in metal testing and it can direct show the strain of metal structure.The traditional eddy current detection can only be carried out by artifi-cially controlling the eddy current detection probe when measuring structural strain and stress deformation,large area detection is com-plicated,so a blanket eddy current detection probe is developed.The blanket eddy current detection can be used for real-time online monitoring and direct and accurately display the deformation condition and position of metal plate.To address the problem of strain measurement in metal plate,different types of blanket eddy current testing are designed and carried out to test the structural strain con-dition,the phenomena of the change of induced voltage generated by structural deformation are compared,and the influence of coil with different turns,position and magnetic field direction on the structural strain is analyzed.The result provides a reference for the selection of non-metallic material structure monitoring methods and has great reference value for further research and development of new strain sensors and measuring instruments.
关键词
金属应变/毯式探头/涡流检测/磁场/检测灵敏度
Key words
metal strain/blanket probe/eddy current detection/magnetic field/detection sensitivity
维普
万方数据