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1. (WO2017196945) APPARATUS AND METHODS FOR DETECTING A VIBRATORY SIGNAL

Pub. No.:    WO/2017/196945    International Application No.:    PCT/US2017/031909
Publication Date: Fri Nov 17 00:59:59 CET 2017 International Filing Date: Thu May 11 01:59:59 CEST 2017
IPC: G01H 11/02
H02K 35/02
Applicants: CORNELL UNIVERSITY
Inventors: LAL, Amit
GUPTA, Sahil
NADIG, Sachin
DAVAJI, Benyamin
Title: APPARATUS AND METHODS FOR DETECTING A VIBRATORY SIGNAL
Abstract:
A vibration transducer module for detecting a vibratory signal, comprising a base, a spring connected to the base at a first location, a mass mechanically coupled to the spring at a second location remote from the first location, and a wall configured to position a first wall electrode and a second wall electrode a selected distance from the first location, the conductive element positioned and sized to contact the first wall electrode and the second wall electrode. The mass comprises a conductive element, and an energy harvester to provide a first voltage signal. The energy harvester may comprise a piezoelectric material or be construct as a SAW device. The module may be combined with a rectifier and an oscillator to form a vibration sensor.