DE69129859D1 - Feuchtigkeits- und salzgehaltssensor und verfahren zum gebrauch - Google Patents

Feuchtigkeits- und salzgehaltssensor und verfahren zum gebrauch

Info

Publication number
DE69129859D1
DE69129859D1 DE69129859T DE69129859T DE69129859D1 DE 69129859 D1 DE69129859 D1 DE 69129859D1 DE 69129859 T DE69129859 T DE 69129859T DE 69129859 T DE69129859 T DE 69129859T DE 69129859 D1 DE69129859 D1 DE 69129859D1
Authority
DE
Germany
Prior art keywords
pct
dielectric constant
complex dielectric
sensor
humidity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69129859T
Other languages
English (en)
Inventor
Keith Watson
Rick Gatto
Peter Weir
Peter Buss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Watson Chemical Corp
Original Assignee
Watson Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Watson Chemical Corp filed Critical Watson Chemical Corp
Application granted granted Critical
Publication of DE69129859D1 publication Critical patent/DE69129859D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/16—Control of watering
    • A01G25/167—Control by humidity of the soil itself or of devices simulating soil or of the atmosphere; Soil humidity sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/023—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil
    • G01N27/025—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil a current being generated within the material by induction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G01N33/245—Earth materials for agricultural purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2617—Measuring dielectric properties, e.g. constants
    • G01R27/2635—Sample holders, electrodes or excitation arrangements, e.g. sensors or measuring cells
    • G01R27/2676—Probes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
DE69129859T 1990-10-12 1991-10-11 Feuchtigkeits- und salzgehaltssensor und verfahren zum gebrauch Expired - Lifetime DE69129859D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK276790 1990-10-12
PCT/AU1991/000467 WO1992007251A1 (en) 1990-10-12 1991-10-11 Moisture and salinity sensor and method of use

Publications (1)

Publication Number Publication Date
DE69129859D1 true DE69129859D1 (de) 1998-08-27

Family

ID=3775004

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69129859T Expired - Lifetime DE69129859D1 (de) 1990-10-12 1991-10-11 Feuchtigkeits- und salzgehaltssensor und verfahren zum gebrauch

Country Status (6)

Country Link
US (1) US5418466A (de)
EP (1) EP0552275B1 (de)
AT (1) ATE168777T1 (de)
DE (1) DE69129859D1 (de)
NZ (1) NZ240208A (de)
WO (1) WO1992007251A1 (de)

Families Citing this family (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA934445B (en) * 1992-06-22 1994-01-24 David John Radford Radio frequency measuring apparatus
ES2111444B1 (es) * 1994-07-29 1999-07-16 Consejo Superior Investigacion Dispositivo para la determinacion simultanea del contenido de agua o grado de humedad y conductividad electrica en terrenos o materiales de baja constante dielectrica.
US5663649A (en) * 1995-06-02 1997-09-02 Her Majesty The Queen In Right Of Canada, As Represented By Agriculture And Agri-Food Canada Soil penetrometer
AU6320096A (en) * 1995-07-14 1997-02-18 Instituut Voor Milieu- En Agritechniek (Imag-Dlo) Method and apparatus for determining a material composition such as the presence of pollutants in a soil
US5740031A (en) * 1995-09-07 1998-04-14 Smart Rain Corp. Inc. Control system for the irrigation of watering stations
US5659655A (en) * 1996-04-29 1997-08-19 Mcdonnell Douglas Corporation Optical ribbon cable fanout boxes
DE19713267A1 (de) * 1997-01-28 1998-07-30 Abb Research Ltd Verfahren zur Bestimmung der Dielektrizitätskonstante und/oder der Leitfähigkeit mindestens eines Mediums sowie Vorrichtung zur Durchführung des Verfahrens
DE69808268T2 (de) 1997-04-16 2003-06-12 Kaiku Ltd., Manchester Beurteilung der flüssigkeitszusammensetzung
US6014029A (en) * 1997-11-12 2000-01-11 Climonics Ltda Sensor for sensing changes in the permittivity of a medium in which it is disposed
GB2344422B (en) * 1998-12-03 2004-02-18 Fairfield Control Systems Ltd Method of,and device and system for,monitoring soil moisture content
AU760233B2 (en) * 1998-12-23 2003-05-08 Eaton Corporation Fluid condition monitor
US6278281B1 (en) * 1998-12-23 2001-08-21 Eaton Corporation Fluid condition monitor
IT1314000B1 (it) * 1999-11-19 2002-12-03 Enitecnologie Spa Metodo per la rilevazione di stratificazioni in sistemi dispersi acqua-olio e mezzi adatti allo scopo.
GB2359893B (en) * 2000-02-29 2004-09-29 Rynhart Res Ltd A moisture meter with impedence and relative humidity measurements
DE10030602C2 (de) * 2000-06-21 2003-06-18 Haissam Mouhasseb Verfahren zur zerstörungsfreien, material-, dichte- und salzunabhängigen sowie temperaturkompensierten Bestimmung der Flüssigwasserkomponente und deren tiefenabhängige ungleichmäßige Verteilung in einem Mehrkomponentengemisch und Vorrichtung zur Durchführung des Verfahrens
AUPR807801A0 (en) * 2001-10-05 2001-10-25 Sentek Pty Ltd Soil probe insertion arrangement and method of use
US6928868B2 (en) * 2002-04-11 2005-08-16 Endress & Hauser Wetzer Gmbh & Co. Kg Water well monitoring system
DE20206903U1 (de) * 2002-04-30 2003-09-04 Imko Intelligente Micromodule Köhler GmbH, 76275 Ettlingen Vorrichtung zur Bestimmung der Feuchtigkeit eines Untergrundes
US7788970B2 (en) * 2002-10-28 2010-09-07 Digital Sun, Inc. Wireless sensor probe
DE10256064B4 (de) * 2002-11-30 2004-10-28 GSF - Forschungszentrum für Umwelt und Gesundheit GmbH Verfahren und Vorrichtung zur Bestimmung des Wassergehalts und der Leitfähigkeit in Böden und Schüttgütern
AU2002953346A0 (en) * 2002-12-16 2003-01-09 Sentek Pty Ltd Soil matric potential and salinity measurement apparatus and method of use
US20050211793A1 (en) * 2004-03-26 2005-09-29 Clark James J Water irrigation system and method of controlling irrigation with community irrigation instructions
US7789321B2 (en) * 2004-09-07 2010-09-07 Digital Sun, Inc. Wireless sprinkler control
US7278186B2 (en) * 2005-01-05 2007-10-09 Uster Technologies Ag Ultra low frequency moisture sensor
US7719432B1 (en) 2005-02-04 2010-05-18 The Toro Company Long range, battery powered, wireless environmental sensor interface devices
US10085393B2 (en) 2005-02-04 2018-10-02 The Toro Company Long range, battery powered, wireless environmental sensor interface devices
US7705614B2 (en) * 2005-03-18 2010-04-27 Troxler Electronic Laboratories, Inc. Apparatuses and systems for density gauge reference emulation
US7170302B2 (en) * 2005-06-27 2007-01-30 Fu Ching Lee Capacitive soil moisture sensor
US20080199359A1 (en) * 2005-07-04 2008-08-21 Senviro Pty Ltd Soil Moisture Sensor
AU2006265764B2 (en) * 2005-07-04 2009-05-21 Senviro Pty Ltd Soil moisture sensor
EP1832870A1 (de) * 2006-03-07 2007-09-12 Hydronix Limited Messung der Eigenschaften von härtbarem Material
DE102006034931A1 (de) * 2006-07-28 2008-01-31 E + E Elektronik Ges.M.B.H. Schaltungsanordnung und Verfahren zur Feuchtmessung
EP2068612A1 (de) * 2006-09-12 2009-06-17 Aquaspy Group Pty Ltd Erdfeuchtigkeitssensor mit datensender
PT1914527E (pt) * 2006-10-20 2010-02-19 Rancilio Macchine Caffe Dispositivo para a regulaçao do nível de líquido na caldeira de uma máquina de café
US8340828B2 (en) * 2007-06-04 2012-12-25 Nissim Danieli Water and fertilizer management system
US8236178B2 (en) * 2007-08-20 2012-08-07 Earth Renaissance Technologies, Llc Reverse osmosis water recover method
US20090177330A1 (en) * 2007-12-20 2009-07-09 Kah Jr Carl L C Wireless moisture probe, receiving controller and irrigation control system
US7535237B1 (en) 2008-01-21 2009-05-19 Advanced Sensor Technology, Inc. Sensor for measuring moisture and salinity
US7408364B1 (en) 2008-05-21 2008-08-05 Advanced Sensor Technologies, Inc. Sensor for measuring moisture and salinity
US8374553B1 (en) * 2009-02-03 2013-02-12 Green Badge, LLC Method and system for improving a communication range and reliability of a soil sensor antenna
JP2012531585A (ja) * 2009-06-26 2012-12-10 シュレイダー エレクトロニクス リミテッド Ｅｍｆ波伝播を利用した液体の水位および品質の感知装置システムおよび方法
CN101629944B (zh) * 2009-08-21 2013-01-09 中国科学院地理科学与资源研究所 一种盐碱地负压计使用方法
GB201011785D0 (en) 2010-07-13 2010-08-25 Oxford Rf Sensors Ltd Permittivity sensor
US9007050B2 (en) 2010-09-17 2015-04-14 The Toro Company Soil moisture sensor with improved enclosure
WO2012139053A2 (en) * 2011-04-07 2012-10-11 Puresense Environmental, Inc. Effective root zone use in crop management
ES2605821T3 (es) 2011-06-12 2017-03-16 Adi Mottes Sonda para control de la conductividad eléctrica de soluciones de suelo
US9797814B2 (en) 2011-06-12 2017-10-24 Adi Mottes Probe for in situ monitoring the electrical conductivity of soil solutions
GB2512507B (en) * 2011-10-24 2016-07-13 The Toro Co Soil moisture sensor
DE102011056754A1 (de) 2011-12-21 2013-06-27 Klaus Spohrer Bodenfeuchtesensor und Kalibrierungsverfahren hierzu
US9146206B2 (en) 2012-02-03 2015-09-29 Deere & Company Capacitance-based moisture sensor
US20140266255A1 (en) * 2013-03-14 2014-09-18 Osmose Utilitites Services, Inc. Automated profiling of the dielectric behavior of wood
AU2014252762B2 (en) 2013-04-10 2018-07-12 Sentek Pty Ltd. Tapered soil moisture sensor arrangement and method of installation
US9411070B2 (en) * 2013-12-13 2016-08-09 Cheng-Hung Chang Extendable wireless soil measurement apparatus
CN106415256B (zh) * 2014-04-10 2020-02-07 森泰克有限公司 柔性传感器电路布置
EP3129172B1 (de) 2014-04-10 2020-05-27 Sentek Pty Ltd. Erdbohrer und verfahren zur herstellung
US20150338363A1 (en) * 2014-05-13 2015-11-26 Auburn University Capacitive fringing field sensors and electrical conductivity sensors integrated into printed circuit boards
US10178835B2 (en) * 2014-07-29 2019-01-15 GroGuru, Inc. Systems and methods for converting and conveying garden events
JP6573359B2 (ja) * 2015-02-10 2019-09-11 大起理化工業株式会社 土壌水分測定装置およびテンシオメータ
WO2017053816A1 (en) * 2015-09-23 2017-03-30 WaterBit, Inc. System and method of sensing soil moisture
CN105353089A (zh) * 2015-11-13 2016-02-24 江苏省农业科学院 一种棉花品种耐盐性的评价方法
CN105758901B (zh) * 2016-02-25 2018-11-30 南京农业大学 农田土壤垂直剖面水分测量方法及装置
CN105973945A (zh) * 2016-06-24 2016-09-28 广东森维绿联科技有限公司 一种土壤水分和养分变化的智能检测装置
US11226304B2 (en) 2016-10-13 2022-01-18 University Of South Australia Apparatus and method for anion detection and/or measurement
WO2018085452A1 (en) * 2016-11-07 2018-05-11 FarmX Inc. Systems and Methods for Soil Modeling and Automatic Irrigation Control
US10533956B2 (en) 2016-12-14 2020-01-14 FarmX Inc. Multi-depth soil moisture monitoring systems and methods to evaluate soil type, packaged in small round polyvinyl chloride tube, with potting and rodent protection, for effective measurements and installation
US10746720B2 (en) 2017-01-13 2020-08-18 FarmX Inc. Soil moisture monitoring systems and methods for measuring mutual inductance of area of influence using radio frequency stimulus
US11519896B2 (en) 2017-01-13 2022-12-06 FarmX Inc. Soil moisture monitoring systems and methods for measuring mutual inductance of area of influence using radio frequency stimulus
AU2018319222B2 (en) * 2017-08-22 2024-08-01 Sentek Pty Ltd Method of determination of water stress in a one or more plants in a crop located in the vicinity of a soil moisture sensor array and knowledge of ETo
US11985925B2 (en) 2017-08-22 2024-05-21 Sentek Pty Ltd. Method of determination of water stress in a one or more plants in a crop located in the region of a soil moisture sensor array and knowledge of ETo
JP6774100B2 (ja) * 2017-10-03 2020-10-21 株式会社ケット科学研究所 コンクリート充填探知・水分経時変化測定用センサ
CA3080206A1 (en) 2017-10-26 2019-05-02 Tribus, Llc System and method for measuring soil electrical conductivity
ES2958811T3 (es) * 2017-10-26 2024-02-15 Tribus Llc Sistema de medición de la conductividad eléctrica del suelo
RS60892B1 (sr) 2018-02-27 2020-11-30 Inst Biosens Istrazivacko Razvojni Inst Za Informacione Tehnologije Biosistema Mikrotalasni senzor vlažnosti zemljišta zasnovan na metodi faznog pomeraja koji je nezavisan od električne provodnosti zemljišta
CN108918822A (zh) * 2018-05-31 2018-11-30 北京圣世信通科技发展有限公司 一种墒情监测系统
US11166404B2 (en) 2018-09-02 2021-11-09 FarmX Inc. Systems and methods for virtual agronomic sensing
WO2020085837A1 (ko) 2018-10-25 2020-04-30 주식회사 다모아텍 토양 수분 센서 및 그 동작 방법
KR102224169B1 (ko) * 2018-10-25 2021-03-09 주식회사 다모아텍 토양 수분 센서 및 그 동작 방법
US11927667B2 (en) 2019-07-26 2024-03-12 Cnh Industrial America Llc System and method for determining subsurface soil layer characteristics based on radar data and secondary soil parameters
US11445275B2 (en) * 2020-02-15 2022-09-13 Michael Murray Soil and environment sensor and method of use
CN111175195A (zh) * 2020-03-04 2020-05-19 中国海洋石油集团有限公司 一种测定泥页岩吸水扩散系数的试验装置及方法
US11464179B2 (en) 2020-07-31 2022-10-11 FarmX Inc. Systems providing irrigation optimization using sensor networks and soil moisture modeling
JPWO2022039007A1 (de) * 2020-08-18 2022-02-24
CN112083252B (zh) * 2020-09-18 2021-07-02 西南交通大学 一种水平分层土壤下接地装置最大经济尺寸系数评估方法
CN112924494B (zh) * 2021-01-20 2022-07-29 德州尧鼎光电科技有限公司 一种具备原位自校准功能的电导率传感器
JP2023178866A (ja) * 2022-06-06 2023-12-18 株式会社デンソー 土壌センサ
WO2024192464A1 (en) * 2023-03-17 2024-09-26 Sentek Pty Ltd Analyte in soil and other medium sensor arrangement

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652227A (en) * 1926-12-07 1927-12-13 Taumac Corp Method of investigating the nature of subterranean strata
US2398800A (en) * 1940-07-06 1946-04-23 Sperry Sun Well Surveying Co Electrical prospecting method and apparatus
US2408029A (en) * 1940-07-06 1946-09-24 Sperry Sun Well Surveying Co Electrical prospecting apparatus
US2376610A (en) * 1941-12-12 1945-05-22 Sperry Sun Well Surveying Co Electrical prospecting method and apparatus
US2689329A (en) * 1950-10-12 1954-09-14 Socony Vacuum Oil Co Inc Dielectric well logging system
US2623923A (en) * 1951-04-23 1952-12-30 Schlumberger Well Surv Corp Electrostatically shielded magnetic well logging system
US2722657A (en) * 1953-07-03 1955-11-01 Perforating Guns Atlas Corp Means for detecting changes in dielectric constant of thin strata of lithological formations traversed by a borehole
US2920172A (en) * 1956-10-04 1960-01-05 Gen Motors Corp Dielectric heating and pressing die structure
US2920272A (en) * 1957-01-09 1960-01-05 Industrial Nucleonics Corp Moisture measuring system
NL6404386A (de) * 1964-04-22 1965-10-25
IT1100002B (it) * 1977-11-01 1985-09-28 Univ Georgetown Metodo ed apparecchio per l'identificazione di materiali
SU759984A1 (ru) * 1977-11-22 1980-08-30 Proizv Ob Agropribor N Устройство для измерения диэлектрических параметров веществ 1 ,-:'2
US4181881A (en) * 1978-05-15 1980-01-01 Preikschat F K Electrical impedance measuring apparatus for providing separate measurements of the conductivity and dielectric coefficient of various materials
US4246534A (en) * 1978-08-31 1981-01-20 The United States Of America As Represented By The Secretary Of The Army Calibration method for lumped capacitance measurement of complex permittivity at HF, VHF and UHF frequencies
EP0011919B1 (de) * 1978-10-27 1982-07-28 A/S Den Norske Remfabrik Dichtung aus Gummi oder ähnlichem Material
JPS55146032A (en) * 1979-05-01 1980-11-14 Sumitomo Electric Ind Ltd Water content meter
US4426616A (en) * 1981-10-06 1984-01-17 Simmonds Precision Products, Inc. Capacitive measurement system
US4692706A (en) * 1985-02-27 1987-09-08 Texaco Inc Well logging means and method for determining water saturation of a petroleum reservoir having two transmitters and two receivers
SU1539639A1 (ru) * 1987-07-13 1990-01-30 Запорожский машиностроительный институт им.В.Я.Чубаря Автоматический измеритель влажности и содержани почвы

Also Published As

Publication number Publication date
ATE168777T1 (de) 1998-08-15
EP0552275A4 (de) 1994-03-23
EP0552275A1 (de) 1993-07-28
US5418466A (en) 1995-05-23
WO1992007251A1 (en) 1992-04-30
EP0552275B1 (de) 1998-07-22
NZ240208A (en) 1995-03-28

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8332 No legal effect for de