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특허 상세정보

Method and apparatus for sensing liquid level using baseline characteristic

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01F-023/26    G01F-023/22   
미국특허분류(USC) 073/304.C; 073/304.R
출원번호 US-0168884 (2005-06-28)
등록번호 US-7360418 (2008-04-22)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Wolf, Greenfield & Sacks, P.C.
인용정보 피인용 횟수 : 78  인용 특허 : 30
초록

A liquid level sensing arrangement using a probe uses a baseline probe circuit characteristic, e.g., a circuit resistance or voltage, that is measured when the probe is out of contact with the liquid in the tank. The baseline characteristic may be used to determine a liquid level in the tank, e.g., a determination whether the liquid level is below or at/above the probe. In one embodiment, the baseline characteristic may be compared to a circuit characteristic that is measured as the tank is being filled. A difference between the baseline characteristic ...

대표
청구항

What is claimed is: 1. A method for determining a level of a liquid in a tank, comprising: providing a tank in which a liquid level is variable; measuring a baseline characteristic of a probe circuit including a probe associated with the tank while the probe is out of contact with the liquid in the tank; starting a filling of the tank from a level at which the probe is out of contact with the liquid; measuring a first characteristic of the probe circuit after measuring the baseline characteristic and during filling of the tank; determining the liquid le...

이 특허에 인용된 특허 (30)

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