[특허]Valve positioner with pressure feedback, dynamic correction and diagnostics

Valve positioner with pressure feedback, dynamic correction and diagnostics 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16K-031/126
출원번호	US-0478506 (1995-06-07)
발명자 / 주소	Lenz Gary A. (Eden Prairie MN) Brown Gregory C. (Minnetonka MN) Warrior Jogesh (Chanhassen MN)
출원인 / 주소	Rosemount Inc. (Eden Prairie MN 02)
인용정보	피인용 횟수 : 151 인용 특허 : 0

초록 ▼

In this invention, a valve positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the position of the valve and the control pressure, and a control circuit in the positioner uses both the sensed pressure and position to provide a command output to a pneumatic section which produces the control pressure. In another embodiment of the invention, a positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the valve position and pneumatics in the positioner provide the control pressure as a function of the sensed position and an output from a control circuit within the positioner. The positioner includes a diagnostic circuit which stores a valve attribute and provides a diagnostic output as a function of the stored valve characteristic and a selected one of the sensed variables. In another embodiment of the invention, a positioner includes a correction circuit for storing a valve attribute affected by one of a set of physical parameters and for receiving a selected one of the set of sensed physical parameters. The correction means compensates a command output from a control circuit as a function of the sensed physical parameter and the stored valve characteristic. In another embodiment, the positioner includes a benchset control circuit which ramps the control pressure between an initial control pressure and a final control pressure and back to the initial control pressure, while sampling specific control pressures and their corresponding positions, in order to provide an output indicating the proper spring preload force on an actuator spring.

대표청구항 ▼

A valve positioner for providing a control pressure to an actuator diaphragm mechanically coupled to a valve spring, the valve spring requiring a preload force in order for the positioner to drive a valve stem between a first control pressure and a first corresponding valve stem position and a second control pressure and a second corresponding valve stem position, the positioner comprising: means for receiving communications representative of the first and second control pressures and their corresponding valve stem positions; means for sensing the valve position and the control pressure; transducer means receiving a supply of air, for providing the control pressure as a function of a command output; benchsetting means receiving the sensed position and control pressure, the benchsetting means providing a command output corresponding to the first and the second control pressures and ramping therebetween, the benchsetting means storing the sensed control pressure at predetermined stem positions, and for providing the preload force as a function of the stored control pressures, the first and second control pressures and their corresponding positions; and means for transmitting the preload force to a master; wherein the benchsetting means calculates a spring constant according to the equation, [Figure] where ys is the valve position at 100% of stroke, y0 is the valve position at 0% of stroke, AE is the effective area of the diaphragm, PS is the control pressure at 100% stroke and PR is the control pressure at 0% stroke, FS is the static frictional force and FD is the dynamic frictional force.

이 특허를 인용한 특허 (151)

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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
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
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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Valve positioner with pressure feedback, dynamic correction and diagnostics 원문보기

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Valve positioner with pressure feedback, dynamic correction and diagnostics 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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