[특허]Fiber-optic interface system

Fiber-optic interface system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-010/00
출원번호	US-0322584 (1994-10-13)
발명자 / 주소	Cucci Gerald R. (Minneapolis MN) Stasz Peter (St. Paul MN) Bjork Paul E. (Forest Lake MN)
출원인 / 주소	NT International, Inc. (Minneapolis MN 02)
인용정보	피인용 횟수 : 114 인용 특허 : 0

초록 ▼

A fiber-optic data-link used to interface a remote process variable sensor/transmitter to a local process control system includes a local light source module and a remote interface module interconnected by one or more optical fibers. Energy for operating the remote interface module and its associated process variable sensor/transmitter is provided by light energy transmitted from the local site to the remote site and converted at the remote site to an electrical signal. The local light source module and the remote interface module each may include a microcontroller. The controllers not only control the flow of status messages in either analog or digital or analog and digital form simultaneously from the remote site to the local site, but also insure the integrity of the system and minimizes the amount of optical power delivered to the remote site to that which is required to electrically power the remote interface module and the process variable sensor/transmitter, thus extending the useful life of the light source. The system is also arranged to check the integrity of the optical fibers to ensure that the light intensity is always below a minimum eye-safe value whenever the optical fiber is not correctly connected between the local light source module and the remote interface module.

대표청구항 ▼

An optically-powered, fiber-optical data-link for interfacing a remote process variable transmitter to a local control system, comprising; (a) a first controller means for controllably applying light energy to a first output terminal and for receiving digitally encoded, optically transmitted messages at a first input terminal; (b) transmitter means electrically connected to said first controller means for transmitting information to said local control system based upon said messages received at said first input terminal; (c) a second controller means having input and output terminals, the second controller means being located remotely from said first controller means for receiving both analog and digital signal components defining the state of a process variable sensed by said remote process variable transmitter and delivering optically encoded digital messages and status information relating to the performance of said second controller means as a message packet to a output terminal of said second controller means, said optically encoded digital message information being based upon the analog and digital signal components defining the state of a process variable sensed by said remote process variable transmitter, said second controller means including a power supply means comprising an optical-to-electrical power converter connected to a power supply converter means for the second controller means and an output conductor, said output conductor being connected to a power supply converter means for supplying electrical power to a remote microcontroller means and said remote process variable transmitter; (d) at least one optical fiber optically coupled between said first output terminal of the first controller means, said input terminal of said second controller means, said output terminal of the second controller means and said first input terminal of the first controller means; and (e) means coupled to said first controller means at said local site for reconstructing the optically encoded digital message information in said message packet into tis analog and digital components prior to being sent to the local control system.

이 특허를 인용한 특허 (114)

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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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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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