Study Of Double Coil Pulsed Eddy Current Thickness Method

In the moden industrial production, with the application of sheet metal more and more widely, for the quality requirements of metal sheet is also getting higher and higher, which is a measure of plate thickness is one of the important technical indicators, a direct impact on the quality and economic Efficicncy, therefore, the thickness of the metal sheet is very important in the plate rolling process.The need for real-time monitoring of the thickness of the plate to be real-time adjustment in order to control the thickness of the plate within the allowable tolerance within the thickness of the plate to mset the requirements of the accuracy index.In this paper, the theory and development of pulsed eddy current testing technology are studied. The characteristics and advantages of pulsed eddy current testing technology are introduced. The influence of extraction effect on pulsed eddy current detection is analyzed, and the method of reducing and eliminating the effect of extraction , Followed by a detailed description of the double coil pulse eddy current thickness measurement method, the hardware circuit of the various modules, the software parn of the data processing, and in the design of the experimental board on the software programming and data processing, and ultimately through experimenes to verify the two-lane The effect of the extraction effect on the measurement accuracy can be reduced or even eliminated, and the design of the whole device can be realized.Finally. the exeprimental results are analyzed and summatized.