Detecting Data Acquisition and Fitting of Steel Plate Stress Concentration Region

The magnetic measurement output signal of plate stress concentration region will change sligtly.In order to find the change orderliness of srress concentration region signal,this paper used PCI-1716 data acquisiton card controned by LABVIEW software to sample the stress concentration region signal at appropriate sampling rate and accuracy.And it adopted MATLAB to fit the data.Thus,the stress concentration region signal can be extracted and restored well.Using this method of data acqusition and fitting can access and analyze the stress concentration region signal,and receive the characters of the signal changes.