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박우성 ( U Sung Park ),부상필 ( Sang Pil Boo ),박수영 ( Soo Young Park ),김도형 ( Do Hyung Kim ),송진우 ( Jin Woo Song ),전종업 ( Jong Up Jeon ),김준원 ( Joon Won Kim ) 한국센서학회 2012 센서학회지 Vol.21 No.2
This paper describes the design, fabrication and testing of a micromachined resonant accelerometer consisting of a symmetrical pair of proof masses and double-ended tuning fork(DETF) oscillators. Under the external acceleration along the input axis, the proof mass applies forces to the oscillators, which causes a change in their resonant frequency. This frequency change is measured to indicate the applied acceleration. Pivot anchor and leverage mechanisms are adopted in the accelerometer to generate larger force from a proof mass under certain acceleration, which enables increasing its scale factor. Finite element method analyses have been conducted to design the accelerometer and a silicon on insulator(SOI) wafer with a substrate glass wafer was used for fabricating it. The fabricated accelerometer has a scale factor of 188 Hz/g, which is shown to be in agreement with analysis results.
정원창 구동기의 진동체 성능 평가를 위한 내이 물리모델
신동호 ( Dong Ho Shin ),임형규 ( Hyung Gyu Lim ),정의성 ( Eui Sung Jung ),성기웅 ( Ki Woong Seong ),이정현 ( Jyung Hyun Lee ),조진호 ( Jin Ho Cho ) 한국센서학회 2013 센서학회지 Vol.22 No.2
Recently, various hearing aids are developed to overcome hearing loss. There are available hearing aids, such as air conduction hearing aid, implantable middle ear hearing aid and so on. But air conduction hearing aid is inconvenience caused by howling, and ossicle chain driving type implantable middle ear hearing aid has some week point due to problem of possible nercobiosis of coupling spot along incus long process. In recent years, in order to improve these shortcomings round window (RW) driving hearing aid has been paying attention. In this paper, the physical cochlear model is proposed for a performance evaluation of the RW driving hearing aids of a transducer. In order to verify an experiment proposed on a performance of physical cochlear model, the transducer which has ossicles characteristics is used. By measuring and comparing the frequency characteristics of transducer with ossicles and human temporal bone, performance of physical cochlear model was verified. As from the result of experiment, it is expected that an implemented cochlear model is useful for evaluating characteristics of RW transducer.