A method for material loss detection, in particular for wear detection, an arrangement for performing this method

Abstract

At least one, preferably at least two bistable magnetic elements (1), which are adapted for magnetization reversal in the dynamic magnetic field of the reading device (2), are positioned in the material wear zone. The material loss is accompanied by a decrease in the number of detected bistable magnetic elements (1). The presence of the bistable magnetic element (1) is detected by the reading device (2) based on the evaluation of the magnetization reversal response of the bistable magnetic element (1), when typical, narrow local maxima (e) are searched for in the received signal. Advantageously, a magnetic field with triangular shape is used, which has essentially a linear increase in excitation, which conveniently separates the maxima of several bistable magnetic elements (1). The reading device (2) can be a permanent part of the system or it can be a portable device that is used during a service or inspection of the particular device. The small size of the bistable magnetic element (1) and the quick method of evaluation enable a wide range of applications, especially in means of transport, in handling and lifting technology and the like.

Dependencies are inferred from the claim text.