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TitleResonant accelerometer based on double-ended tuning fork and a force amplification mechanism
Author(s)Moreira, Eurico Esteves
Kuhlmann, Burkhard
Gaspar, João
Rocha, Luís Alexandre Machado
Issue date13-Nov-2018
PublisherMultidisciplinary Digital Publishing Institute
Abstract(s)Resonant accelerometers are an alternative to amplitude modulated devices due to their higher integration capabilities, since they are encapsulated in vacuum and are stable at low pressures. Vacuum is required for some sensors (i.e., gyroscopes) but amplitude modulated accelerometers tend to be unstable under such conditions and therefore cannot be integrated in the same package. Herewith, a device composed by double-ended tuning fork resonators (DETF) and a force amplification mechanism for sensitivity enhancement is presented. Characterization of the fabricated devices was performed, and the design was successfully validated. A sensitivity close to 80 Hz/g was experimentally measured and the DETF characterization for different driving (AC) and bias voltages (DC) is also presented.
TypeConference paper
AccessOpen access
Appears in Collections:BUM - MDPI

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