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Method and apparatus for detecting defects in workpieces using a core- type magnet with magneto-sensitive detectors

机译:使用具有磁敏检测器的芯型磁体检测工件缺陷的方法和设备

摘要

A method is proposed by which defects in workpieces are detected magnetically, which method comprises the following steps being performed concurrently: scanning the test surface of a workpiece utilizing magneto- sensitive elements; magnetizing the workpiece perpendicularly to its test surface in the test zone; exciting magneto- sensitive elements; and measuring the tangential component of the magnetic field strength in the test zone. An apparatus for magnetically detecting defects in workpieces according to the proposed method comprises an electrical signal excitation/measuring unit and a detector. The latter has a housing which accommodates a core-type magnet rigidly fixed to it and adapted to be magnetized prependicularly to its working surface which mounts magneto- sensitive elements separated from each other and oriented in a prescribed manner. The elements connect each other and the electrical signal excitation/measuring unit as well.
机译:提出了一种磁性检测工件缺陷的方法,该方法包括同时进行以下步骤:利用磁敏元件扫描工件的测试表面;在测试区域中垂直于其测试表面磁化工件;令人兴奋的磁敏元件;在测试区域中测量磁场强度的切向分量。根据所提出的方法磁性地检测工件中的缺陷的设备包括电信号激励/测量单元和检测器。后者具有壳体,该壳体容纳刚性地固定到其上并且适于垂直地磁化到其工作表面的芯型磁体,该芯体安装彼此分开并且以规定的方式定向的磁敏元件。这些元件彼此之间也与电信号激励/测量单元相连。

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