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1. (WO2018158678) METHOD AND SYSTEM FOR MEASURING FORCES

Pub. No.:    WO/2018/158678    International Application No.:    PCT/IB2018/051218
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Wed Feb 28 00:59:59 CET 2018
IPC: G01L 1/24
G01D 5/353
Applicants: ISTITUTO SUPERIORE MARIO BOELLA SULLE TECNOLOGIE DELL'INFORMAZIONE E DELLE TELECOMUNICAZIONI
Inventors: ABRATE, Silvio
Title: METHOD AND SYSTEM FOR MEASURING FORCES
Abstract:
A system for detecting forces acting upon an optical transducer (1), comprising an optical signal source adapted to transmit optical signals (2a, 2b), a transducer (1) arranged on an optical path (1f) adapted to propagate the optical signals (2a, 2b), sensor means (1b) arranged on the optical path (1f) and adapted to modify the transmission of the optical signals (2a, 2b) along the optical path (1f) as a consequence of a stress (5) acting upon them, wherein the system comprises a receiver equipped with a polarizing beam splitter (PBS) for splitting the incoming optical signal (x,y,PTOT) into two components (U1,U2,αPTOT,βPTOT) to be sent to two receiver devices (PD1,PD2), wherein each receiver device (PD1,PD2) converts the optical signal received into a corresponding electric signal, and wherein the sum of the powers (αPTOT,βPTOT) of the two components (U1,U2) of the signal is always constant, in the absence of a stress also the other relationships between the powers (αPTOT,βPTOT) of the two components (U1,U2) of the signal are constant, and in the presence of a stress the other relationships between the powers (αPTOT,βPTOT) of the two components (U1,U2) of the signal change.