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Capacitance measuring circuit and method for liquid leak detection by measuring charging time 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01R-027/26
  • G01R-031/02
  • G01R-031/08
  • H02G-015/28
출원번호 US-0726479 (1991-07-08)
발명자 / 주소
  • Reddy
  • III William J. (Scottsdale AZ)
출원인 / 주소
  • W. L. Gore & Associates, Inc. (Newark DE 02)
인용정보 피인용 횟수 : 62  인용 특허 : 0

초록 ▼

A leak detection system and method are disclosed. The capacitance of a leak detection cable is changed by a leaking liquid. A capacitance measuring circuit detects changes in the capacitance of the cable and thereby detects the presence of a leak. The capacitance measuring circuit includes an invert

대표청구항 ▼

A capacitance measuring circuit for use with a leak detection cable, said circuit comprising: (a) inverter means for receiving a DC input voltage and for inverting said DC input voltage to produce a mirror-image inverter DC voltage; (b) current source means for receiving a DC voltage (VX) and for pr

이 특허를 인용한 특허 (62)

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  43. Salter, Stuart C.; Lee, Yun Shin; Buttolo, Pietro; Gardner, Cornel Lewis, Proximity switch assembly having ground layer.
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  51. Salter, Stuart C.; Buttolo, Pietro; Gardner, Cornel Lewis, Proximity switch having differential contact surface.
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  52. Salter, Stuart C.; Buttolo, Pietro; Gardner, Cornel Lewis; Goodson, Thomas Lee, Proximity switch having learned sensitivity and method therefor.
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  53. Salter, Stuart C.; Hill, Anna; Singer, Jeffrey; Gardner, Cornel Lewis; Padilla, Beatriz Esthela, Proximity switch having lockout control for controlling movable panel.
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  54. Salter, Stuart C.; Gardner, Cornel Lewis; Singer, Jeffrey; Whitens, Michael James, Proximity switch having sensitivity control and method therefor.
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  55. Buttolo, Pietro; Salter, Stuart C., Proximity switch having wrong touch adaptive learning and method.
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  56. Salter, Stuart C.; Buttolo, Pietro; Gardner, Cornel Lewis; Singer, Jeffrey, Proximity switch having wrong touch feedback.
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  57. Fukuda,Yoshinori, Shielded cable, and bioelectrical impedance value or biological composition data acquiring apparatus using the same.
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  58. Philipp Harald, Time domain capacitive field detector.
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  59. Raymond, Donald M., Twisted leak detection cable.
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  60. Raymond, Donald M., Twisted leak detection cable.
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  62. Salter, Stuart C.; Hill, Anna Miller; Gardner, Cornel Lewis; Witek, Joseph S., Vehicle control system with proximity switch and method thereof.
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