Development of an on-line system for precision dimensional measurements in electrical steels using approach to ferromagnetic saturation

Abstract

Abstract-A system based on a measurement technique magnetisation near saturation is presented that allows high precision measurement of dimensional parameters of iron alloys. Extensive measurements in electrical steel laminations show high accuracy in measurement of cross section area of the strips. The technique uses approach to saturation magnetisation which has previously been shown to be dependent on alloying content of the materials. This system is proposed for on-line measurement of cross sectional area and thickness of electrical steels, and other types of ferromagnetic strip metals.

Determination of the demagnetisation of electrical steel strips

“…The calculated applied magnetic field was produced by a comparably longer rectangular coil, and the results were then compared with those of measured values on actual samples using the computerised experimental set-up, previously described in [23,24]. Figure 1 shows the basic structure of an open magnetic circuit tester used for the measurements.…”