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[미국특허] Capacitive fluid level sensor 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01F-023/26
출원번호 US-0519731 (1990-05-07)
발명자 / 주소
  • Hart John R. (Lexington OH)
출원인 / 주소
  • Therm-O-Disc, Incorporated (Mansfield OH 02)
인용정보 피인용 횟수 : 50  인용 특허 : 0

초록

A device that determines liquid level or volume by means of charging a plurality of capacitors in sequence. Each capacitor is charged for a fixed time interval. The voltage level obtained is a function of the liquid level and is compared with a known voltage to obtain an output signal that can be us

대표청구항

A device for sensing the liquid level in the container comprising: first and second elongated tubes in said container arranged one inside the other in a concentric, spaced relationship to reduce the effect of liquid sloshing in the container; a continuous conductive surface on one of the elongated t

이 특허를 인용한 특허 (50) 인용/피인용 타임라인 분석

  1. Tichborne, Franklin; Beale, James, Aircraft fuel level measurement apparatus and method.
  2. Luo, Ming, All working condition continuously measuring liquid level meter for a steam drum of a boil and the liquid level computing method thereof.
  3. Harper, Gregory C.; Batenburg, Gregory A.; Schranz, Paul S., Apparatus and method for volume and mass estimation of a multiphase fluid stored at cryogenic temperatures.
  4. Cho,Jin Hee, Apparatus, a method, and measuring sensors for scanning states of engine oil.
  5. Livingston, Richard A.; Chamberlain, Roger D., Auto-compensating capacitive level sensor.
  6. Richard A. Livingston, Balanced charge pump capacitive material sensor.
  7. McCulloch L. Michael ; Bruer Richard E. ; Byram Thomas P., Capacitive level sensor and control system.
  8. Matulek Andrew M., Capacitive liquid level indicator.
  9. Odisho, William Warda; Coleman, Daniel R.; Ziech, Jim; Ridge, Jim; Lagerquist, Steven; Walton, Mark, Capacitive oil level sensor for vehicular drive axles.
  10. Brostrom, Troy R.; Hiszem, Mark; Miu, Richard A.; Warner, Jason M., Compressor assembly with liquid sensor.
  11. Brostrom, Troy R.; Kulkarni, Sunil S.; Van Hoose, Ronald L., Compressor assembly with liquid sensor.
  12. Kulkarni, Sunil S.; Van Hoose, Ronald L., Compressor assembly with liquid sensor.
  13. Brostrom, Troy Richard; Jorwekar, Pavankumar Pralhad; Jagdale, Prashant Ramesh; Juge, Vinayak Madanrao; Ahire, Pankaj, Compressor having oil-level sensing system.
  14. Brostrom, Troy Richard; Jorwekar, Pavankumar Pralhad; Jagdale, Prashant Ramesh; Juge, Vinayak Madanrao; Ahire, Pankaj, Compressor having oil-level sensing system.
  15. Brostrom, Troy Richard; Jorwekar, Pavankumar Pralhad; Jagdale, Prashant Ramesh; Juge, Vinayak Madanrao; Ahire, Pankaj, Compressor having oil-level sensing system.
  16. Ross,Herbert; Swindler,Danny E., Dial assembly for a gauge.
  17. Hannan Alan R. ; Nickolin Thomas M., Digital liquid level sensing apparatus.
  18. Woodard,Stanley E.; Taylor,Bryant D., Flexible framework for capacitive sensing.
  19. Lin, Yingjie; Rodriguez, Lorenzo Guadalupe; Manlove, Gregory Jon; De Los Angeles Chee, Maria, Fluid level measuring system.
  20. Levy, Warren Michael, Fluid level sensing device and methods of using same.
  21. Hampo Richard Joseph ; Momcilovich Paul Theodore ; Stuntz Ross Maxwell, Fluid level sensing system.
  22. Bahorich, Phillip Andrew; Eisa, Victor; Hessling, Michael Anthony; Joshi, Nalin, Fuel gauging system utilizing a digital fuel gauging probe.
  23. Swindler, Danny E.; Ross, Jr., Herbert G., Gauge assembly having a stop fill device.
  24. Ross, Jr., Herbert G., Gauge head assembly with non-magnetic insert.
  25. Kawakatsu Hiroshi,JPX ; Tanaka Kouichi,JPX ; Uematsu Hiroshi,JPX, Level sensor.
  26. Zimmermann, Bernd D.; Reynolds, David; Gerich, Richard L., Liquid level sensor.
  27. Zimmermann, Bernd; Reynolds, David W.; Welch, Richard E.; Millet, Hank E., Liquid level sensor.
  28. Albin Robert ; Cacciola John A., Liquid level sensor utilizing AC and resistance.
  29. Jackson, Ken; Gunthorpe, Gary E., Measuring liquid flow rate from a nozzle.
  30. Power Wendy ; Reed Michael A. ; Frustaci Dominick J., Method and apparatus for determining the quantity of a liquid in a container independent of its spatial orientation.
  31. Pindus,Gerald; Husson,Alan; Carleton,Jeffrey; Hoffman,Lee, Method and apparatus for measuring the volume of fuel in a tank.
  32. Yingjie Lin, Method for measuring fluid level.
  33. Woodard, Stanley E.; Taylor, Bryant D., Method of calibrating a fluid-level measurement system.
  34. Levy, Warren Michael, Method of determining a level of a fluid in a well.
  35. Levy, Warren Michael, Method of optimizing production of a well.
  36. Capano, David, Scanning capacitive array sensor and method.
  37. Williamson, Cecil M., Self-calibrating capacitance gauge.
  38. Calabrese, Ronald V., Self-calibrating liquid level transmitter.
  39. Calabrese,Ronald V., Self-calibrating liquid level transmitter.
  40. Calabrese,Ronald V., Self-calibrating liquid level transmitter.
  41. Wallrafen Werner,DEX, Sensor for accurate measurement of levels in irregularly shaped tanks.
  42. Ross, Jr., Herbert G.; Swindler, Danny E., Service valve assembly having a stop-fill device and remote liquid level indicator.
  43. Woodard,Stanley E.; Taylor,Bryant D., System and method for wirelessly determining fluid volume.
  44. Hägg, Lennart, System and method in a radar level gauging system.
  45. Scardovi,Alessandro, System for detecting the level of liquid in a tank.
  46. Sargent, John S.; Sargent, Frank T., Volume charge density measuring system.
  47. McDermid, John, Water measurement apparatus and methods.
  48. McDermid,John, Water measurement auto-networks.
  49. Cutler, David M.; Berluti, Jr., Vincent; Healy, Thomas F.; Londona, Jeffrey William; Marquis, James Alphonse; Méndez, Mark Henry, Water sensing electrode circuit.
  50. Taylor,Bryant D.; Woodard,Stanley E., Wireless fluid level measuring system.

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