Experience of the use of a magnetosensitive sensor in a rolling mill

A device allowing one to measure the speed of rotation of rollers in a rolling mill using magnetic markers is proposed. The device involves an accessory that marks the rollers magnetically and a magnetic field sensor (Hall probe). Simulation provided the determination of the minimal number of markers, their geometry, and their arrangement for obtaining a sinusoidal signal from the sensor. The device was successfully tested in production conditions.