[특허]System for monitoring storage tanks

System for monitoring storage tanks 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01E-025/00
출원번호	US-0484209 (1990-02-23)
발명자 / 주소	Crawford Charles D. (Burlington NC) King Jr. James A. (Stoneville NC) Randolph John H. (Charlotte NC)
출원인 / 주소	J.A. King & Company, Inc. (Greensboro NC 02) Major Oil Company, Inc. (Greensboro NC 02)
인용정보	피인용 횟수 : 34 인용 특허 : 0

초록 ▼

A system for monitoring a storage tank containing a fluid. The system measures the buoyancy force acting on a displacer suspended in a storage tank by means of a load cell. The resulting force acting on the displacer is proportional to the mass of fluid in the tank. A look-up table is first developed by making periodic entries of the resulting load cell output during the initial filling of the tank. This data is then stored in a computer memory. By utilizing this data and interpolating between entries, a very accurate measurement of the fluid mass in the tank is calculated. In addition, by making periodic measurements over time, small leaks can be detected. In the preferred embodiment, the monitor includes an A/D converter located adjacent to the sensor assembly, thereby substantially eliminating measurement errors due to thermoelectric effects. The sensor assembly includes a generally cylindrical displacer extending from near the tank bottom or at least below the lowest level reached by the fluid in the tank to the maximum level reached by the fluid. In one preferred embodiment, the displacer has a tapered cross-section on at least one of its ends to substantially eliminate measurement errors which occur due to changes in fluid temperature.

대표청구항 ▼

A monitoring system for a storage tank containing a fluid, said system comprising: (a) a body positioned within said tank and extending into the fluid contained by said tank; (b) sensor means for sensing the force exerted by said fluid upon said body and providing a first signal representative of said force; (c) means mounted within said tank adjacent to said sensor means for receiving said first signal and providing a second signal, said second signal being digitally encoded, whereby said means is maintained at substantially the same temperature as said sensor means and the fluid in said tank, thereby eliminating measurement errors, for example the Seebeck Effect, which occur due to differences in temperature between said sensor means, the fluid in said tank, and said means mounted within said tank; and (d) first storage means for storing a plurality of first values in a look-up table, each of said first values corresponding to a periodic entry of the force exerted by said fluid upon said body during initial filling of said tank, said first values defining a relationship between the force exerted upon said body at a given fluid depth in said tank and the corresponding fluid mass within said tank, said first values being based on the unique characteristics of said tank, said characteristics including tank shape, volume, orientation, location of said sensor means, and the shape of said body.

이 특허를 인용한 특허 (34)

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McGookin Hugh R., Liquid level indicating method and system.
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Memmott,Vincent J.; Hillam,John D.; Peterson,Richard D., Performing temperature standardization of the volume of a liquid product at one or more points of physical measurement.
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Kalpin, Scott L., Pressure based refill status monitor for implantable pumps.
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Kalpin, Scott L., Pressure based refill status monitor for implantable pumps.
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Hillam,John D.; Peterson,Richard D., Preventing unauthorized delivery of liquid product to a liquid product storage tank.
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Hillam, John D.; Scoleri, Jon M.; Shellabarger, Gary I., Virtual real-time liquid product book to physical reconciliation process in a dynamic environment.
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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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연합인증

System for monitoring storage tanks 원문보기

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System for monitoring storage tanks 원문보기

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이 특허를 인용한 특허 (34)

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