Level sensor and method of registering a level in a container
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0125061
(2002-04-17)
|
우선권정보 |
DE-0019555 (2001-04-21) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Siemens Aktiengesellschaft
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
4 |
초록
▼
In a level sensor (1) having a pair of measuring electrodes (4) and a pair of reference electrodes (5), reference electrodes (5a, 5b) have a horizontal section (12). The horizontal section (12) extends over the entire width of a container (2). In this way, physically limited inhomogeneities in the l
In a level sensor (1) having a pair of measuring electrodes (4) and a pair of reference electrodes (5), reference electrodes (5a, 5b) have a horizontal section (12). The horizontal section (12) extends over the entire width of a container (2). In this way, physically limited inhomogeneities in the liquid in the container (2) are compensated for in the measurement of a reference variable.
대표청구항
▼
1. A level sensor for a container, preferably for a washing water container in a motor vehicle, comprising electrodes for measuring electrical variables of a liquid in the container and comprising an evaluation unit for evaluating the measured electrical variables, a pair of reference electrodes pro
1. A level sensor for a container, preferably for a washing water container in a motor vehicle, comprising electrodes for measuring electrical variables of a liquid in the container and comprising an evaluation unit for evaluating the measured electrical variables, a pair of reference electrodes provided to register a reference variable being provided for arrangement in a lower region of the container, and a pair of measuring electrodes provided to register measured variables dependent on the level extending over at least a subarea of height of the container, wherein, in relation to a section of the height of the container (2), the pair of reference electrodes (5) has a greater surface than the pair of measuring electrodes (4). 2. The level sensor as claimed in claim 1, wherein pair of reference electrodes (5) has a horizontal section (12). 3. The level sensor as claimed in claim 2, wherein the pair of reference electrodes (5) extends over the entire width of the container (2). 4. The level sensor as claimed in claim 1, wherein the pair of reference electrodes (5) extends over the entire width of the container (2). 5. The level sensor as claimed in claim 1, wherein at least one electrode (5a) of the pair of reference electrodes (5) is configured as an electric conductor insulated exclusively in an upper region of the container (2). 6. The level sensor as claimed in claim 1, wherein the electrodes (5a, 5b) of the pair of reference electrodes (5) have at their free end an angled portion (13) pointing in direction of bottom of the container. 7. The level sensor as claimed in claim 1, wherein the electrodes (5a, 5b) of the pair of reference electrodes (5) are arranged completely within a reserve region of the container (2). 8. The level sensor as claimed in claim 1, wherein at least one electrode (4a) of the pair of measuring electrodes (4) is led as far as immediately before the reserve region. 9. The level sensor as claimed in claim 1, wherein the electrodes (5a, 5b) of the pair of reference electrodes (5) are of lamellar configuration. 10. A method of registering a level in a container, preferably in a washing water container of a motor vehicle, comprising the steps wherein a pair of reference electrodes measures an electrical reference variable in a lower region of the container, a pair of measuring electrodes detects an electrical measured variable over height of the container to be detected, and an evaluation unit calculates level in the container from the measured electrical variables, and wherein registration of the electrical reference variable is carried out over a larger horizontal region of the container than registration of the electrical measured variable. 11. The method as claimed in claim 10, wherein in a reserve region of the container, the level is calculated via duration of a pump operation and volume flow delivered. 12. The method as claimed in claim 11, wherein in the reserve region of the container, the level is determined via change in the electrical reference variable. 13. The method as claimed in claim 10, wherein in a reserve region of the container, the level is determined via change in the electrical reference variable.
이 특허에 인용된 특허 (4)
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Gothe Diethard (North Eltham AUX) Nuske Jeffrey J. (Diamond Creek AUX) Friedrich Jrgen (Ringwood AUX), Device for the capacitive level height measurement of liquids or solids.
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Mulder Richard (Venkelstraat 8 3252 BV Goedereede NLX), Gauge for measuring the conductance of a liquid present between two electrodes.
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Mulder Richard (Venkelstraat 8 3252 BV Goedereede NLX), Gauge for measuring the level or the conductance of a liquid present between two electrodes.
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McDonald Charles W. (Gallatin TN), Liquid level sensing device and methods of making and operating the same.
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Childers, Robert W.; Holmquist, Kurt; Hopping, Peter A., Dialysis methods and systems having autoconnection and autoidentification.
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Krammer, Gert, Level sensor for cryogenic liquids, and receptacle comprising such a level sensor.
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Lee, Patrick; Biewer, John; Childers, Robert W.; Foohey, Mark W.; Gilbert, II, Richard R.; Kopychev, Andrey; Murphey, Randy; Orand, Austin J.; Reitz, Douglas; Roger, Rodolfo; Steck, John E., Medical fluid machine with supply autoconnection.
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Childers, Robert W.; Roger, Rodolfo, Mobile dialysis system having supply container detection.
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Ahn, In Geun, Steam generator and laundry machine having the same.
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