Abstract:
The alternating current field measurement (ACFM) is a nondestructive testing method which detect crack and calculate size of crack by measuring the change of magnetic field. In order to promote the development of visualization of the ACFM machine, a kind of real-time and friendly software of upper computer was designed based on VB6.0. The acquired data from lower computer come into the software of PC through RS232 serial communication, and then the data transfer into the VB program through the module of MSComm. Finally, the data was processed to display the real-time curve and saved in the program. Using the software test the 45 # steel plate with artificial rectangle crack defects, the result showed that the software could well represent the properties and features of detecting crack.