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A mechanically amplified Fabry–Pérot optical accelerometer is reported in which photothermal actuation is used to calibrate the in-phase and quadrature (I&Q) readout. The Fabry–Pérot interferometer (FPI) is formed between a gold-coated silicon mirror, situated in the middle of a V-beam amplifier, and the end surface of a cleaved optical fiber. On the opposite side of the silicon mirror, a further...
A method is reported for improving the performance of a Fabry-Pérot optical accelerometer, based on the use of a V-beam mechanism to amplify the proof mass displacement. Amplification allows the sensitivity to be increased without compromising bandwidth or requiring an increase in cavity finesse. An analytical expression relating the amplification factor to the V-beam length, width and angle was derived...
This paper describes and evaluates the continued development of a prototype vibration-powered, wireless sensor for use in condition based maintenance (CBM) applications. To reduce installation and maintenance costs, the CBM industry is turning interest increasingly toward wireless, self-powered sensors, but a major impediment to more widespread implementation has been a lack of sensors that can scavenge...
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