PROBLEM TO BE SOLVED: To provide a magnetostriction measuring method by a method of ultrasonic standing wave capable of determining magnetostriction at an optional portion of a magnetic body accurately and simply by utilizing an elastic standing wave generated in the magnetic body; and also to provide a stress inspection method using the method.;SOLUTION: An elastic wave is propagated in the magnetic body 10 and reflected, and thereby a standing wave is formed in the magnetic body 10 and a vibration magnetic field is generated, and magnetostriction generated in the magnetic body is measured from the vibration magnetic field. An induced electromotive force and the magnetostriction are measured beforehand by changing an external magnetic field HDC at a prescribed position of the magnetic body 10 wherein the standing wave is formed, and the relation between the induced electromotive force and the magnetostriction relative to an effective magnetic field is determined as calibration data. A constant external magnetic field HDC is applied to the magnetic body 10 wherein the standing wave is formed, and the induced electromotive force by the vibration magnetic field at each part is measured along the elastic wave propagation direction of the magnetic body, and the magnetostriction at each part of the magnetic body is calculated based on the calibration data determined beforehand.;COPYRIGHT: (C)2007,JPO&INPIT
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机译:解决的问题:提供一种通过超声波驻波的方法进行的磁致伸缩测量方法,该方法能够利用在磁体中产生的弹性驻波来准确而简单地确定磁体的任意部分处的磁致伸缩。解决方案:弹性波在磁性体10中传播并反射,从而在磁性体10中形成驻波并产生振动磁场,并产生磁致伸缩根据振动磁场测量在磁体中产生的电磁波。通过在形成驻波的磁性体10的规定位置处改变外部磁场H DC Sub>,预先测量感应电动势和磁致伸缩,以及感应电动势和磁致伸缩之间的关系。相对于有效磁场的磁致伸缩被确定为校准数据。将恒定的外部磁场H DC Sub>施加到形成驻波的磁体10上,并沿着振动的弹性波传播方向测量每个部位的由振动磁场产生的感应电动势。磁性体,并根据事先确定的校准数据计算出磁性体各部分的磁致伸缩。;版权:(C)2007,JPO&INPIT
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