Aiming at problem of large size

high power consumption and inconvenient operation of magnetic flux leakage（MFL） testing instruments based on IPC design

a kind of portable MFL testing instrument based on embedded technology is designed.The instrument uses S3C2440A embedded microprocessor as core and Windows CE 5.0 as embedded operating system

capture MFL signals by using Hall sensor

accomplish detection of ferromagnetic materials workpiece mechanical structure defects.Experimental result shows that the instrument has advantages of high sensitivity

simple structure

and portable

and has some promotional value.