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Compensated capacitive liquid level sensor

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01F-023/26
출원번호 US-0513182 (2000-02-25)
발명자 / 주소
  • Yishay Netzer IL
출원인 / 주소
  • Millennium Sensors Ltd. IL
대리인 / 주소
    Mark M. Friedman
인용정보 피인용 횟수 : 75  인용 특허 : 8

초록

A fringing-field capacitive liquid level sensor comprising an electrically insulating substrate, having a first and a second pattern of conductive capacitance plates plated on the substrate. Each pattern constitutes a fringing-field capacitor having a capacitance the value of which is both dependent

대표청구항

1. A uniform field compensated-type capacitive sensor for measuring the liquid level of a liquid having a dielectric constant inside a container, wherein said sensor is fixed to said container and comprises:first and second non-conductive substrates facing each other; at least three electrodes forme

이 특허에 인용된 특허 (8)

  1. Maltby Frederick L. (Jenkintown PA) Kramer L. Jonathan (Warminster PA), Admittance sensing probe having multiple sensing elements.
  2. Park Kyong M ; Le Phuoc Vinh ; Nassar Marcos A., Capacitive sensor assembly.
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  5. Kobayashi Hiroshi (Yokohama JPX), Liquid quantity sensor of capacitor type.
  6. Maltby Frederick L. (Jenkintown PA) Woerner Edward R. (North Wales PA) Meacham ; Jr. Thomas E. (Holland PA) Petersen Steven R. (Ambler PA), Probe system for measuring the condition of materials.
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  8. Lee Calvin S. (30492 N. Hampton Rd. Laguna Niguel CA 92677), Variable fluid and tilt level sensing probe system.

이 특허를 인용한 특허 (75)

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  63. Thomas, Alfred, Security zones for casino gaming.
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  66. Prendergast, Patrick Norman; Rouse, Mark W., Sensor patterns with reduced noise coupling.
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  71. Milone, Christopher J., Temperature compensated hydrostatic liquid level sensor.
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  73. McDermid,John, Water measurement auto-networks.
  74. Wanie,Andrew J., Water softener monitoring device.
  75. Woodard, Stanley E., Wireless open-circuit in-plane strain and displacement sensor requiring no electrical connections.
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