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특허 상세정보

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Soil moisture sensor

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) A01G-025/16   
미국특허분류(USC) 137/1 ; 137/783 ; 239/64
출원번호 US-0198433 (1994-02-18)
발명자 / 주소
인용정보 피인용 횟수 : 55  인용 특허 : 0
초록
▼

Moisture sensor devices, systems and methods of making and using the same employ a pair of elongated, probe-like, conductive sensor elements, coupled as part of an LC oscillator circuit. The use of an LC oscillator circuit can minimize adverse effects of conductivity variances in the medium being monitored, because the resistance of the medium (and, thus, the medium\s conductivity) has minimal or no effect on the resonant frequency of an LC oscillator circuit. An LC oscillator circuit of suitable stability for moisture sensing applications includes first...

대표
청구항
▼

A method of sensing the moisture content of a volume of a medium, the medium having a dielectric constant dependant on the medium\s moisture content, the method comprising the steps of: disposing first and second spaced apart conductive sensor elements within said volume of the medium, to provide a capacitance dependent upon the dielectric constant of the medium when disposed within said volume of the medium; coupling an inductance element to said first and second sensor elements in an LC oscillator circuit having an oscillation frequency dependent on th...

이 특허를 인용한 특허 피인용횟수: 55

  1. Campbell, Jeffrey; Sohrabi, Kathy; Karmel, Clayton R.. Antenna circuit matching the soil conditions. USP2013028368529.
  2. Albadri, Ali; Smith, Andrew; Rogers, Paul; Male, Peter. Apparatus and method for measurement of hardenable material characteristics. USP2010037681438.
  3. Fontana, Jr., Anthony J.; Campbell, Gaylon S.; Campbell, Colin S.; Walden, Benjamin J.; Holmes, Derek L.. Apparatus, method, and system for measuring water activity and weight. USP2010107806585.
  4. Hubbell,Joel M.; Sisson,James B.; Schafer,Annette L.. Exfiltrometer apparatus and method for measuring unsaturated hydrologic properties in soil. USP2006016986281.
  5. Kaminski, Michael Anthony. Flow control center sensing pressure by barometric sensor and emit sensed pressure signal. USP2018059971328.
  6. Frey Werner,DEX ; Gotz German,DEX. Humidity sensor for capacitive measurement of humidity in bulk material. USP1999105969243.
  7. Float, Ardele Y.; Float, Kenneth W.. Landscape sprinkling systems. USP2004026685104.
  8. Troxler, Robert Ernest. Large area position/proximity correction device with alarms using (D)GPS technology. USP2010087786876.
  9. Carr Raymond A. ; Lauman Brian C.. Leak detection system for liquid processing device. USP2000036038914.
  10. Caamano,Ramon Anthony; Lee,Michael J.. Low power system for wireless monitoring of an environment and irrigation control. USP2007057216659.
  11. Miller,Michael F.; Masters,Brett P.; Lundstrom,Mark E.. Method and apparatus for detection of analyte using a flexural plate wave device and magnetic particles. USP2007117300631.
  12. Jennings,Thomas A.. Method and apparatus for monitoring and determining the moisture content of a substance in a container. USP2006047030631.
  13. Wherley, Benjamin G.; Alvarado, Jorge Luis; White, Richard H.; Thomas, James C.; Men, Junfeng; Tate, Dean Evan; Jaber, Fouad H.; Reynolds, William C.. Method and system for reduction of irrigation runoff. USP2018059955636.
  14. Troxler, Robert Ernest; Malassenet, Francois Jacques. Methods, systems, and computer program products for locating and tracking objects. USP2010127848905.
  15. Troxler, Robert Ernest; Malassenet, Francois Jacques. Methods, systems, and computer program products for locating and tracking objects. USP2012028126680.
  16. Robb, John Chamberlain; Arms, Steven W.; Townsend, Christopher P.; Churchill, David L.; Hamel, Michael J.. Miniature stimulating and sensing system. USP2010027668667.
  17. Campbell, Gaylon S.; Greenway, Warren C.. Moisture detection apparatus and method. USP2005066904789.
  18. Lashgari,Bijan. Moisture responsive sprinkler circuit. USP2006067063271.
  19. Stockton Paul. Moisture sensor having low sensitivity to conductance changes. USP1999015859536.
  20. Kelly John M.. Moisture sensor using helical transmission line. USP1998105818241.
  21. Zimmerman,James. Optical moisture sensor. USP2007037189960.
  22. Troxler, Robert E.. Paving related measuring device incorporating a computer device and communication element therebetween and associated method. USP2014038682605.
  23. Bienvenu,Michael E.; Pjura,John; Troxler,Robert Ernest. Paving-related measuring device incorporating a computer device and communication element therebetween and associated method. USP2008057376530.
  24. Troxler, Robert E.. Paving-related measuring device incorporating a computer device and communication element therebetween and associated method. USP2012028112242.
  25. Troxler, Robert Ernest. Position and proximity detection systems and methods. USP20181010109174.
  26. Harrington, Jeffrey M.; Koebler, Martin; Kozar, Norbert; Caamano, Ramon A.; Lee, Michael J.. Remote control for hose operation. USP2012038132592.
  27. Harrington, Jeffrey M; Koebler, Martin; Kozar, Norbert; Caamano, Ramon A; Lee, Michael J. Remote control for hose operation. USP2014068739815.
  28. Tracey, James B. A.; Burke, Jr., James E.; Prosise, Roy Paul; Okonsky, Christian. Remote control for valve and hose reel system. USP2015079079748.
  29. Tracey, James B. A.; Burke, Jr., James E.; Prosise, Roy Paul; Okonsky, Christian. Remote control for valve and hose reel system. USP20190110180204.
  30. Campbell, Jeffrey. Sensor for measuring moisture and salinity. USP2009057535237.
  31. Campbell, Jeffrey. Sensor for measuring moisture and salinity. USP2011027884620.
  32. Campbell,Jeffrey. Sensor for measuring moisture and salinity. USP2008087408364.
  33. Campbell,Jeffrey. Sensor for measuring moisture and salinity. USP2009017482820.
  34. Soto Jaime J.,CLX ; Carmona Rolando A.,CLX ; Susaeta Andres,CLX ; Herrera Leonardo C.,CLX ; Lepe Marcelo I.,CLX ; Orellana Marcelo H.,CLX. Sensor for sensing changes in the permittivity of a medium in which it is disposed. USP2000016014029.
  35. Izadnegahdar, Alain. Soil humidity evaluation with contact free coupling. USP2012018089287.
  36. Buss,Peter. Soil matric potential and salinity measurement apparatus and method of use. USP2006057042234.
  37. Richings, Sr., Jon; Martin, Scott. Soil moisture probe and system with temperature adjustment. USP2018049949450.
  38. Kumaran, Hari Hara; Tomar, Vibha. Soil moisture sensor. USP2017109804113.
  39. Runge, Thomas H.; Hill, Jason Lester; Zimmerman, James. Soil moisture sensor. USP2016059326462.
  40. Runge, Thomas H.; Hill, Jason Lester; Zimmerman, James. Soil moisture sensor. USP2015038981946.
  41. Dresselhaus, Daniel D.; O'Brien, Kevin G.. Soil moisture sensor and controller. USP2014038671969.
  42. Dresselhaus, Daniel D.; O'Brien, Kevin G.. Soil moisture sensor and controller. USP2012018104498.
  43. Hill, Jason Lester. Soil moisture sensor with improved enclosure. USP2015049007050.
  44. Hughes,William C.. Soil probe device and method of making same. USP2007027183779.
  45. Graham,Glen Gary. Systems and methods for adaptation to wireless remote control of irrigation valves from existing hardwired control devices. USP2007107286904.
  46. Clark,James Jolly; Perkins,Michael T.; Small,David. Water irrigation system with moisture gauge and method of controlling irrigation. USP2007017165730.
  47. Ensworth, Mark M.; Booth, Barbara E.; Thornton, Dean C.; Fern, David G.; Hern, Randall A.; Napier, Malcolm N.. Wireless extension to an irrigation control system and related methods. USP2012058185248.
  48. Ensworth, Mark M.; Booth, Barbara E.; Thornton, Dean C.; Fern, David G.; Hern, Randall A.; Napier, Malcolm N.. Wireless extension to an irrigation control system and related methods. USP2013088504210.
  49. Ensworth, Mark M.; Booth, Barbara E.; Thornton, Dean C.; Hern, Randall A.; Napier, Malcolm N.. Wireless extension to an irrigation control system and related methods. USP2011088010238.
  50. Thornton, Dean C.; Hern, Randall A.; Napier, Malcolm N.. Wireless extension to an irrigation control system and related methods. USP2009077558650.
  51. Ensworth, Mark M.; Booth, Barbara E.; Thornton, Dean C.; Hern, Randall A.; Napier, Malcolm N.. Wireless irrigation control. USP20190210194599.
  52. Ensworth, Mark M.; Booth, Barbara E.; Thornton, Dean C.; Hern, Randall A.; Napier, Malcolm N.. Wireless irrigation control. USP2016049320205.
  53. Tennyson, Michael James; Reyes Archundia, Angel; Torre, Frank; Jenkins, Robert H.; Mueller, Brian Jeffrey. Wireless irrigation control. USP20190210201133.
  54. Tennyson, Michael James; Reyes, Angel; Torres, Frank; Jenkins, Robert H.; Mueller, Brian Jeffrey. Wireless irrigation control. USP2016019244449.
  55. Thornton, Dean C.; Hern, Randall A.; Napier, Malcolm N.. Wireless irrigation control. USP2014108868246.

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