Based On PLC Control Magnetic Powder Flaw Detector System Design

Magnetic powder was detected by magnetic powder in the defect of the leakage magnetic field near to detect accumulation ferromagnetic materials surface or near surface defects in a nondestructive testing method.And magnetic powder flaw detection machine is a kind of ferromagnetic materials is based on the magnetized, because do not continuity of existence, to make the work surface and near surface of local distortion field lines happen from leakage magnetic field, on the surface of workpiece adsorption of magnetic powder, in the right light visual visible magnetic image formation, which shows the location of the discontinuance, size, shape and the severity of the nondestructive testing equipment.Along with the rapid development of science and technology, microelectronics technology, computer technology and automatic control technology in industrial automation field and a wide range of applications, especially the programmable controller (PLC) technology has entered a new era. This article through to the magnetic particle testing standards and technology research, develop will PLC in the magnetic powder flaw detection equipment control system. The magnetic powder testing technique is to use the principle of magnetic flux leakage cylinder surface flaw detection, adopt sealed magnetic yoke clamp ampere electrode automatic holding magnetic structure, to measure a by magnetic yoke method to establish the weeks to the magnetic field, used to check the longitudinal defects, with coil winding method, a axial magnetic field, namely the longitudinal magnetization, used to check the defects of the circumference direction. So the swing in the form of a rotating magnetic field, a comprehensive display of the crack and defects, and no any blind area. The control system has been developed in the enterprise had a successful application, supporting the research results of practical, validity and advantage. For enterprises to improve the magnetic powder detection level and quality to provide a reliable and effective technology guarantee, wide social benefits and economic benefits.