介绍大中型环形件磁粉探伤机,该机采用心棒法与感应电流法同轴复合磁化工件.控制系统由8032单片机组成,利用“最小二乘法”找出各种钢铁材料起始磁化曲线的解析表达式,再根据已确定的工件尺寸进行磁化规范的自动选择,具有结构新颖、性能稳定、自动化程度高等优点. Introduced the large and medium-sized annular magnetic particle testing machine, which uses the mandrel and induction current coaxial composite magnetization workpiece.The control system consists of 8032 single-chip microcomputer, using the “least square method” to find all kinds of steel materials, the initial magnetization curve analysis Expression, and then according to the size of the workpiece has been identified for the automatic selection of magnetization, with a new structure, stable performance, high degree of automation advantages.