磁场指示器
Magnetic field indicator
磁粉探伤将钢铁等磁性材料制作的工件予以磁化，利用其缺陷部位能吸附磁粉的特征，依磁粉分布显示被探测物件表面缺陷和近表面缺陷的探伤方法。 该探伤方法的特点是简便、显示直观。
Magnetic particle inspection magnetizes workpieces made of magnetic materials such as steel and the like, utilizes the characteristic that the defective parts can absorb magnetic particles, and displays surface defects and near-surface defects of the detected objects according to the distribution of the magnetic particles. The flaw detection method is characterized by simplicity and intuitive display.
磁粉探伤与利用霍耳元件、磁敏半导体元件的探伤法，利用磁带的录磁探伤法，利用线圈感应电动势探伤法同属磁力探伤方法。
Magnetic particle inspection is the same as magnetic inspection using Hall element, magnetic sensitive semiconductor element, magnetic tape recording and coil induced electromotive force.
