During metallic wire drawing processes, the presence of knots and the failure to detect\udthem can lead to long production interruptions, significant economic losses and a lower\udquality of final product. Consequently, there is a pressing need to develop methods\udfor real-time detection and prevention of this fault. In this paper, a sensor to prevent the\udformation of knots during the metallic wire drawing process is presented and evaluated\udby means of experimental data. This fast, inexpensive, non-contact sensor is based\udon electromagnetic principles such as eddy current induction, magnetic reluctance\udvariations and magnetic coupling. The proposed sensor without direct contact can detect\udknots in a target metallic wire by measuring the impedance variations of a calibrated\udsensing coil caused by either a knot or an unwound loop rising from a wire rod. The\udincorporation of this type of sensor into a wire-drawing machine can avoid the\udtightening of the knot, thereby reducing downtime and increasing the security and\udreliability of the process. Experiments were conducted using a scale model of the above\udproposed system. This allowed highlighting the sensor’s potential by carrying out an\udautomatic, real-time knot detection during steel wire drawing
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