[특허]Angular rate sensor

Angular rate sensor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01P-009/04
출원번호	US-0926878 (1986-11-05)
발명자 / 주소	Watson William S. (Eau Claire WI)
출원인 / 주소	Watson Industries Inc. (Eau Claire WI 02)
인용정보	피인용 횟수 : 27 인용 특허 : 0

초록 ▼

Angular rate sensors are disclosed. Each sensor includes a forked vibrating element having two tines extending from a base end to a free end. Each of the tines are magnetized to have two regions of opposing magnetic polarity, with the polarity of corresponding regions between the different tines being opposite. In a first embodiment, the tines are driven in complementary resonant vibration by a pair of drive coils positioned about the tines near the free ends thereof. In a second embodiment, the drive coils are located about the tines at the junction of the regions of magnetization mid-element. In the first embodiment, sense motions are detected by a pair of sense coils positioned about mid-element near the junction of the first and second regions of magnetization. In the second embodiment, sense motions are detected by capacitive sensing, which consists of two parallel plate capacitors formed of the tines and additional plates, which are connected for differential sensing. Each of the tines is configured to have a first natural frequency of resonance in the drive plane and a second natural frequency of resonance for sense motions, with the second frequency being greater than the first, in order to extend the usable bandwidth of operation of the sensor.

대표청구항 ▼

An angular rate sensor comprising: (a) a vibrating element having a base end and a pair of elongate tines extending therefrom to a free end of said element, said base end forming a nodal axis of vibrational energy for said tines, said element being fabricated to permit vibration of said tines in a drive plane of motion at a drive resonant frequency and to permit vibration of said tines transverse to said drive plane motion at a sense resonant frequency; (b) each of tines being magnetized to have two separate magnetic systems each including a north and a south pole to provide two regions of opposite and relatively high external magnetic field, a first one of said regions situated near the free ends of each of said tines and a second one of said regions situated between said first region and said base end, the correspondingly situated regions of said tines being of opposite magnetic field; (c) electromagnetic drive means interacting with one correspondingly situated pair of said regions for vibrating said tines in opposition relative to one another in the drive plane of motion at said drive resonant frequency; (d) sensing means for producing an output signal in response to opposing sense motions of said tines occurring transverse to the drive plane, said output being representative of the rate of turn of said vibrating element about a central longitudinal axis thereof.

이 특허를 인용한 특허 (27)

Watson,William S., AGC circuit for the reduction of harmonics in the drive signal.
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Nozoe, Toshiyuki, Angular speed sensor.
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Okada, Kazuhiro, Angular velocity sensor.
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Okada,Kazuhiro, Angular velocity sensor.
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Ayazi, Farrokh; Sung, Wang-kyung; Zaman, Mohammad Faisal, Bulk acoustic wave gyroscope with spoked structure.
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Greiff Paul, Capacitive in-plane accelerometer.
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Paros, Jerome M.; Schaad, Theo P., Digital angular rate and acceleration sensor.
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Ward Paul (Waltham MA), Electronics for Coriolis force and other sensors.
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Ward Paul (Waltham MA), Electronics for coriolis force and other sensors.
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Weinberg, Marc S.; Bancu, Mirela G.; Bickford, James A.; Bernstein, Jonathan J.; Elliott, Richard, High performance sensors and methods for forming the same.
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Murray F. Feller, Inertial flow sensor and method.
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Uemura, Takeshi, Inertial force sensor and detecting element used for same.
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Hobbs, Larry P.; Newell, G. Richard, Inertial rate sensor and method with improved clocking.
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Greiff Paul, Micromechanical accelerometer having a peripherally suspended proof mass.
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Greiff Paul, Monolithic micromechanical vibrating beam accelerometer with trimmable resonant frequency.
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Okada,Kazuhiro, Multi-axial angular velocity sensor.
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Greiff Paul, Process for micromechanical fabrication.
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Bhardwaj Pradeep, Ratiometric transducer and method.
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Ayazi, Farrokh; Sharma, Ajit; Zaman, Mohammad Faisal, Readout method and electronic bandwidth control for a silicon in-plane tuning fork gyroscope.
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Ayazi, Farrokh; Sharma, Ajit; Zaman, Mohammad Faisal, Readout method and electronic bandwidth control for a silicon in-plane tuning fork gyroscope.
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Ayazi,Farrokh; Zaman,Mohammad Faisal; Sharma,Ajit; Amini,Babak Vakili, Resonating star gyroscope.
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Ward Paul A. (Roslindale MA), Sensor having an off-frequency drive scheme and a sense bias generator utilizing tuned circuits.
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Watson, William S., Single bar type vibrating element angular rate sensor system.
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Ljung Per B. (32 Hemlock Ter. Wayne NJ 07470), Solid state vibrating gyro.
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Ohta, Kazuhiro; Yachi, Masanori; Takahashi, Yoshitaka; Kikuchi, Kazutsugu; Saito, Keiji, Tuning fork vibration gyro.
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Hotelling Steven P. (Cupertino CA) Land Brian R. (Los Gatos CA), Vibratory rate gyroscope and methods of assembly and operation.
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Gutierrez, Roman C.; Tang, Tony K., Z-axis vibratory gyroscope.
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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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Angular rate sensor 원문보기

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Angular rate sensor 원문보기

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이 특허를 인용한 특허 (27)

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