Arrangement for measurement on a permanent magnet

摘要

Arrangement for measurement on a permanent magnet with the aid of a magnet yoke and two variable poles at a distance from each other, between which the permanent magnet and a Hall probe are located. At least one coil is assigned to the permanent magnet and one to the Hall probe. This arrangement is intended to make routine measurements on permanent magnets and their evaluation easier to carry out and more accurate than hitherto. It is intended to make it possible to obtain with high accuracy the maximum energy product of field strength and induction directly and without any interpolation. For this purpose, a multiplying element, a minimum discriminator and a gate are arranged between the fluxmeter and the Hall probe on the one hand and the indicating and/or registering means on the other hand. The multiplying element has two inputs and one output, of which one input is connected to the fluxmeter, the second input is connected to the Hall probe and the output is connected to the gate via a branch containing at least the maximum discriminator and via a branch containing an A/D convertor. If the arrangement with field coil is used, it may be provided in duplicate, for each pole. <IMAGE>