[특허]Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic field

Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic field 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G08B-023/00
출원번호	US-0322713 (1994-10-12)
발명자 / 주소	Belcher Donald K. (W. Melbourne FL)
출원인 / 주소	Harris Corporation (Melbourne FL 02)
인용정보	피인용 횟수 : 34 인용 특허 : 0

초록 ▼

A proximity detector includes a low frequency magnetic field generator, located with an individual being monitored, the generator sequentially generating a plurality of encoded, time varying magnetic fields having mutually orthogonal polarizations. A magnetic field sensor unit is provided within a second device, carried by another individual. The magnetic field sensor unit is operative to detect encoded magnetic field energy associated with one or more of the magnetic fields generated by the magnetic field generator. Preferably, the magnetic field sensor unit includes a plurality of magnetic field sensors having respective magnetic field polarization sensitivities that are oriented mutually orthogonal with respect to one another. Each of the magnetic field sensors produces a respective first output signal in response to detecting encoded magnetic field energy generated by the magnetic field generator of at least a predefined level and containing an code pattern corresponding to that stored by the magnetic field sensor unit. A time-out circuit is coupled to each of the magnetic field sensors, and generates an alarm signal in response to a prescribed failure to receive a first output signal from any of the magnetic field sensors within periodic time intervals, thereby indicating that the monitored individual is beyond a prescribed range or distance from the monitoring individual.

대표청구항 ▼

A method for detecting whether a first device is physically separated by more than a prescribed distance from a second device comprising the steps of: (a) at said first device, generating a plurality of time varying magnetic fields; and (b) at said second device, detecting magnetic field energy associated with said time varying magnetic fields generated at said first device in step (a) and, in response to failing to detect a prescribed threshold level of magnetic field energy, generating a first output signal representative that said first device is physically separated by more than said prescribed distance from said second device; and wherein said plurality of time varying magnetic fields have respectively different magnetic field polarizations; and wherein step (b) comprises providing a plurality of magnetic field sensors having magnetic field polarization sensitivities that are oriented differently from one another, each of said magnetic field sensors being operative to produce a respective magnetic field detection signal in response to detecting a predefined level of magnetic energy, and combining magnetic field detection signals generated by said plurality of magnetic field sensors and comparing the resultant combination of said magnetic field detection signals with a value representative of said prescribed threshold level of magnetic field energy.

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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

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic field 원문보기

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Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic field 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (34)

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