Method and device serving to determine the mechanical properties of products in ferromagnetic material

摘要

The device comprises an axially symmetric magnetic field pulse shaper 1 and a circuit 3 for measurement of the gradient of the residual field normal component. The device is equipped with a memory 4, a comparator 5 and a pulse amplitude measuring device 2 at the output of the shaper 1. The inputs of the measuring device 2 are linked to the outputs of the comparator 5 and of the pulse shaper 1. The inputs of the memory 4 and of the comparator 5 are coupled to the output of the circuit 3. The second input of the comparator 5 is connected to the output of the memory 4. The shaper 1 comprises a reservoir capacitor, the charging and discharging circuits of the latter, a holding circuit and a comparator, a pulse counter, a decoder and an "code-analog" translator electrically linked together. IMAGE