Coin recognition using an inductive proximity sensor microsystem
Philippe Passeraub, P.-A. Besse, C. de Raad, O. Dezuari, F. Quinet, R.S. Popović · 2002
We have realized metallic profile imagery of coins using a miniaturized inductive proximity sensor. The sensor is a microsystem composed of a 1 mm diameter coil and a new ASIC interface based on the principle of a differential relaxation oscillator. This imagery is appropriate for coin pattern recognition. We successfully acquired well recognizable images of various coins with similar and different geometrical, electrical and magnetic properties.