Cognition of the Metallic Material Properties and Physical Dimensions by Magnetic Sensor Signal Visualization

抄録

This paper proposes a method of 3-D Lissajous diagram for signal processing of a differential coil type magnetic sensor. Overlapping several Lissajous diagrams between the sensor input and output signals yields a three-dimension or grayscale image whose height or tone reveals a number of overlapped points. This conversion from the time-domain sensor signals to an image provides the differences in frequency, amplitude, phase, distortion, etc. Employing image cognition methodology to this three-dimension image makes it possible to identify each of the signals stored in a database. We demonstrate the renmarkable cognition results by our magnetc sensor signals processing strategy.