Patent ID: 9286873
Filing Date: 2016-03-15
CPC Classification: G01D,G10H

Claim Text:
1. A sensor device configured to measure a movement and/or a vibration of at least one object of interest, in particular musical instruments, comprising: at least two excitation inductance coils electrically linked to at least one electrical excitation source and suitable for generating magnetic excitation fluxes, and at least one measuring inductance coil, electrically linked to electrical measuring device suitable for measuring induced electrical signals, a magnetic circuit magnetically linking the excitation and measuring coils, and comprising a measurement area in which the presence of the at least one object of interest affects magnetic fluxes originating from excitation coils and passing through said measuring coil(s), and the excitation coils arranged so that in the absence of the at least one object of interest in the measurement area, they generate magnetic fluxes which substantially balance each other out in the at least one measuring coil.