Method and device for determining the temporal form of the shock wave in a ferrmomagnetic member which is objected to impacts

摘要

The speed with which magnetic flux in a mechanical sample changes is related to the speed with which a mechanical impulse travels through it. The component is subjected to a magnetic field as a mechanical impulse is applied and the resulting voltage change in a measurement coil is measured. The additive superposition of the measurement voltage is used to determine the integrated measurement voltage. The integrated measurement voltage is in turn used to compensate for Eddy currents caused by a mechanical impulse wave to improve the accuracy of measurements of time of flight of an impulse wave through a component.