[특허]Automatic level control system and method

Automatic level control system and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01G-011/08 G05D-009/00
출원번호	US-0873919 (1992-04-24)
발명자 / 주소	Pitts Alan J. (Comanche OK) Fowler Charles E. (Duncan OK)
출원인 / 주소	Halliburton Company (Duncan OK 02)
인용정보	피인용 횟수 : 18 인용 특허 : 0

초록 ▼

An automatic level control system and method provide continuous proportional control of an inlet valve when the level of material in a storage container is between low and high limits. The system includes a main feedback loop and a nested feedback loop to insure proper control of the inlet valve through which material is added to the storage container. The main feedback loop provides a control signal indicating the desired setting of the inlet valve, and the nested feedback loop provides a control signal indicating the actual position of the inlet valve so that the two control signals can be compared for use in accurately moving the inlet valve to the desired position. The main feedback loop includes a computer into which different density values can be input for accurately determining the amount of material in the container as indicated by a weight sensor.

대표청구항 ▼

An automatic level control system, comprising: storage means for receiving a material; weight sensing means for sensing the weight of the material in said storage means; means, responsive to said weight sensing means, for providing a control signal; valve means for controlling the flow of the material into said storage means, said valve means providing a material flow passageway adjustable through a range of states from fully closed to fully open; feedback means for sensing the state of the passageway to which said valve means is adjusted; means for adjusting the state of the passageway of said valve means in response to the control signal and said feedback means; and wherein said means for providing a control signal includes: means for entering a selected density value for the material received in said storage means; means, responsive to the entered selected density value and the sensed weight of the material received in said storage means, for determining low and high limits and the amount of material received in said storage means relative to the low and high limits; and means for generating the control signal in proportional response to the determined relationship between the amount of material received in said storage means and the low and high limits.

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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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Automatic level control system and method 원문보기

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