[특허]Liquid container hydrostatic level gauge

Liquid container hydrostatic level gauge 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01F-023/18
출원번호	US-0634226 (1991-01-02)
우선권정보	DE-3914637 (1989-05-03)
국제출원번호	PCT/DE90/00265 (1991-04-05)
§371/§102 date	19910102 (19910102)
국제공개번호	WO-9013796 (1990-11-15)
발명자 / 주소	Jansche Walter (Durmersheim DEX) Zabler Erich (Stutensee DEX) Dukart Anton (Maximiliansau DEX)
출원인 / 주소	Robert Bosch GmbH (Stuttgart DEX 03)
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

A liquid container hydrostatic level gauge, in particular a fuel tank level indicator, which operates with a differential pressure sensor, a zero point calibration related to the height of the fuel is performed upon the beginning of measurement, in order to dispense with a requirement for temperature independence and long-term stability of the zero point of the differential pressure sensor. A meter tube is disposed in the container interior, extending from above the maximum liquid level to as far as the container bottom with an opening for receiving fuel within the tank. The differential pressure sensor is connected by one meter input to the upper end of the meter tube and by its other meter input is exposed to the air pressure acting upon the surface of the liquid. An air pump is connected to the upper end of the meter tube between the upper level of the fuel and the input to the pressure sensor. At the beginning of measurement, the meter tube is flooded, and an output value (Uo) of the differential pressure sensor is stored in memory. For determining the fill level, the meter fuel is forced from the tube by pumping air in, and the fill level (h(t)) is determined from a measure of the difference between the instantaneous output signal (u(t)) and the memorized value (Uo).

대표청구항 ▼

A liquid container hydrostatic liquid level gauge, in particular a fuel tank liquid level indicator, which has a differential pressure sensor and a control and evaluation unit that determines an instantaneous liquid level in said liquid container from electrical output signals of the differential pressure sensor and a display unit outside of said liquid container for displaying the instantaneous liquid level, said liquid level indicator is disposed in an interior of said container and includes a meter tube (24) of small diameter, open at a face end juxtaposed a bottom of said liquid container and extending from an upper end disposed above a maximum liquid level (20′) in said liquid container to juxtapose the container bottom (121) and at an onset of measurement is filled with liquid up to the liquid level of the container (20), said differential pressure sensor (21) is provided with a first meter input connection (211) to which said upper end of the meter tube (24) is connected and a second meter input connection (212) which is open to an air pressure (p0) which air pressure also acts upon the surface of the liquid; a zero point displacement output signal (U0) is stored in memory in the control and evaluation unit (22) when the meter tube (24) is filled with liquid up to the instantaneous liquid level, then an air pump (26) is connected to an upper end portion of the meter tube (24) at a position above the maximum liquid level, said air pump pumps air into said meter tube (24) above the instantaneous liquid level which for liquid level measurement forces out the liquid about said face end to evacuate the meter tube (24), and that a liquid level determination in the control and evaluation unit (22) is effected from a difference between an output signal (u(t)) of the differential pressure sensor (21) with the meter tube (24) evacuated and said stored zero point displacement output signal.

이 특허를 인용한 특허 (20)

Stephenson Stanley V. (Duncan OK) Dant Ronald E. (Duncan OK) Toellner Robert L. (Duncan OK) Arnold Edward P. (Duncan OK) Van Le Thuong (Duncan OK) Berryman Leslie N. (Duncan OK), Apparatus, method and system for monitoring fluid.
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Stephenson, Stanley V.; Dant, Ronald E.; Toellner, Robert L.; Arnold, Edward P.; Van Le, Thuong; Berryman, Leslie N., Apparatus, method and system for monitoring fluid.
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Bouchard, Claude, Bubble level meter and related method.
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Schuppe Alfred ; Dringenburg Dean H. ; Schneider Matthew L. ; Weng Weibo ; French Mike, Continuous liquid level measurement system.
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Sten Wallin SE; Tom Pessala SE; Par Emtell SE, Dispenser unit for non-gaseous flowable material.
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Axtell James P. ; Seu Preston D., Fluid level detection apparatus and method for determining the volume of fluid in a container.
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Hampo Richard Joseph ; Momcilovich Paul Theodore ; Stuntz Ross Maxwell, Fluid level sensing system.
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Grothaus, Brent J.; Stein, Nicholas J., Fuel level meter for industrial vehicles.
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Grothaus, Brent J.; Stein, Nicholas J., Fuel level meter for industrial vehicles.
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Milanovich, Philip John; Milanovich, John Kostin, Fuel tank pressure indicator, including cap and container interface pressure indicator.
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Tetil, Garrett M., Level sender with sensors.
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Krahn Heinrich,DEX ; Gunther Adolf,DEX ; Weindl Werner,DEX, Measuring system for liquid volumes and liquid levels of any type.
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Dorenkott Jeffrey S. ; Downing William R., Method and apparatus for aspirating and dispensing sample fluids.
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Wolford, Jimmy; Wolford, Jr., Bernie; Lockerd, Clark; Slaughter, Ricky, Method and apparatus for leak detection in horizontal cylindrical storage tanks.
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Wolford, Jimmy; Wolford, Bernie; Lockerd, Clark; Slaughter, Ricky, Method and apparatus for storage tank leak detection.
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Srinivasan,Jagannathan Seenu, Method for calibrating steam generator water level measurement.
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Huemer, Herfried; Ruether, Horst, Method for determining the current filling level of a liquid in a container.
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Wolford, Jimmy; Wolford, Bernie; Lockerd, Clark; Slaughter, Ricky, System and method for detecting and quantifying changes in the mass content of liquid storage containers.
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Perry, Paul D.; Veinotte, Andre, System and method of managing pressure in a fuel system.
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Christ, Bernhard; Schloderer, Richard, Volume measurement of a liquid, method and device.
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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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Liquid container hydrostatic level gauge 원문보기

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