Magnetic Flux Leakage Detection Based on Area Array Hall Sensor
In traditional magnetic flux leakage testing,the single probe has a small detection area and the moving device is not flexible and the detection efficiency is low when the permanent magnet is used.Therefore,this paper uses AC excitation to design 48 surface array sensor detection modules with a single effective coverage area(36 x 36)mm.The circuit design adopts multiplexing technology.DG508 is used as the multi-channel analog switch,and the myRIO1900 data acquisition card controls the acquisition by time.In the upper computer software,the orig-inal data is self-balancing technology.In the process of data processing,threshold enhancement technology is used to improve the display effect of defect images.The experiment shows that the design can detect the artificial grooving under the 2 mm protective layer.
magnetic flux leakage detectionarea array sensorhall elementLabVIEW
万方数据
维普
