Vibration sensor device for musical instruments

• Main Author: PERIN JEAN-PIERRE AMBROISE
• Format: Patent
• Language: English
• Published: 15.03.2016
• Subjects: ACOUSTICS; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; ELECTROPHONIC MUSICAL INSTRUMENTS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MUSICAL INSTRUMENTS; PHYSICS; TARIFF METERING APPARATUS; TESTING

The present invention relates to a sensor device (2) for measuring a movement and/or a vibration of at least one object of interest, in particular for musical instruments, said device comprising (i) at least two excitation inductance coils (11, 12) electrically connected to at least one electric excitation source, and capable of generating excitation magnetic fluxes, and (ii) at least one measuring inductance coil (13), electrically connected to electrical measuring means capable of measuring induced electrical signals, (iii) a magnetic circuit (10) magnetically connecting the excitation coils (11, 12) and measuring (13) coils, and comprising a measuring area (17) wherein the presence of objects of interest affects magnetic fluxes coming from excitation coils (11, 12) and passing through said measuring coil or coils (13), and (iv) excitation coils (11, 12) arranged in such a way as to generate, in the absence of an object of interest in the measuring area (17), magnetic fluxes which substantially cancel each other out in the at least one measuring coil (13). The invention also relates to a sound system implementing said device.