[특허]Single bar type vibrating element angular rate sensor system

Single bar type vibrating element angular rate sensor system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01L-041/08
출원번호	US-0030713 (2005-01-06)
등록번호	US-RE42916 (2011-11-01)
발명자 / 주소	Watson, William S.
출원인 / 주소	Watson Industries, Inc.
대리인 / 주소	Patterson Thuente Christensen Pedersen, P.A.
인용정보	피인용 횟수 : 0 인용 특허 : 94

초록 ▼

An angular rate sensor system [10] comprising a vibratory sensing element [12] and signal processing circuit [14]. The element [12] is preferably a polymorphic rectangular bar fabricated from two layers of piezoceramic material [26, 28] divided by a thin center electrode [Ec], and a plurality of electrodes [E1-E4] scored onto the planar conductive surfaces [30, 32]. The element [12] is suspended at its acoustic nodes [N, N′] to vibrate in one direction [V] normal to the physical plane of the electrodes [Ec, E1-E4] using any suitable mounting structure such as parallel crossed filaments [34] or inwardly angled support arms [64] that provide predetermined degrees of lateral [S′] and longitudinal [S] stiffness. The circuit [14] may optionally constitute totally shared [FIG. 7], partially shared [FIG. 8], or totally isolated [FIG. 9] driving and sensing functions, the corresponding element [12] being configured with dual-pair, single-pair, or single-triple outer electrodes [E1-E4], respectively. The circuit [14] typically utilizes an automatic gain control and two operational amplifiers, and may include various signal conditioning components and a separate tuning module.

대표청구항 ▼

What is claimed is: 1. An angular rate sensor system which may be used with a signal processing circuit to discriminate an angular rate, the angular rate sensor system comprising:a mounting structure; anda vibratory sensing element including a substantially planar base electrode presenting a pair of opposing sides, at least two layers of piezoelectric material each disposed on and substantially covering the opposing sides of the base electrode, a first outer electrode disposed on a first side of the vibratory sensing element, and a second outer electrode disposed on a second side of the vibratory sensing element opposing the first side, the first outer electrode and the second outer electrode being oriented generally parallel with a plane, the vibratory sensing element defining a pair of natural acoustic nodes when vibrated in a direction of vibration oriented generally perpendicular to the plane, the vibratory sensing element being suspended from the mounting structure proximate to each of the pair of natural acoustic nodes so as to vibrate in the direction of vibration, said angular rate sensor system further comprising a third outer electrode, the third outer electrode being disposed on the first side of the vibratory sensing element and oriented generally parallel with the plane, and a fourth outer electrode, the fourth outer electrode being disposed on the second side of the vibratory sensing element and oriented generally parallel with the plane,whereby wherein the vibratory sensing element vibrates in the direction of vibration oriented generally perpendicular to the plane when either the first electrode or the second electrode are excited by a drive signal, and further whereby wherein the first electrode or the second electrode produce sensing signals responsive and proportional to the angular rate of the vibratory sensing element, the signal processing circuit discriminating the angular rate from the sensing signals.

이 특허에 인용된 특허 (94)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Single bar type vibrating element angular rate sensor system 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허에 인용된 특허 (94)

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연합인증

Single bar type vibrating element angular rate sensor system 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허에 인용된 특허 (94)

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