ATE304T1 - MICROWAVE MOISTURE METER WITH SWITCHABLE MEASUREMENT RANGES. - Google Patents

MICROWAVE MOISTURE METER WITH SWITCHABLE MEASUREMENT RANGES.

Info

Publication number
ATE304T1
ATE304T1 AT79104245T AT79104245T ATE304T1 AT E304 T1 ATE304 T1 AT E304T1 AT 79104245 T AT79104245 T AT 79104245T AT 79104245 T AT79104245 T AT 79104245T AT E304 T1 ATE304 T1 AT E304T1
Authority
AT
Austria
Prior art keywords
measuring
resonator
microwave
sample
frequency
Prior art date
Application number
AT79104245T
Other languages
German (de)
Inventor
Hans Georg Dr. Fitzky
Joerg Michael Dr. Soeder
Franz Schmitt
Norbert Bollongino
Helmut Rehrmann
Original Assignee
Bayer Ag
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 Bayer Ag filed Critical Bayer Ag
Application granted granted Critical
Publication of ATE304T1 publication Critical patent/ATE304T1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G01N22/04—Investigating moisture content

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Measuring Volume Flow (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The generator for the microwave measuring arrangement consists of a frequency-modulated oscillator which feeds a cavity measuring resonator in a transmission arrangement. The sample to be examined is located in the center of the resonator. The microwave signal allowed through the resonator is detected as the peak amplitude of a detector circuit, the change in the signal corresponding to the change in the quality factor due to the presence of the sample introduced. The average frequency of the microwave oscillator can be switched over several stages in order to expand the range of measurement. Each time the frequency is switched over, a different field mode is excited in the measuring resonator so that the sample is located in a mode region of the electrical measuring field for measuring high water contents and in a maximum of the electrical measuring field for measuring low water contents.
AT79104245T 1978-11-11 1979-10-31 MICROWAVE MOISTURE METER WITH SWITCHABLE MEASUREMENT RANGES. ATE304T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782848993 DE2848993A1 (en) 1978-11-11 1978-11-11 MICROWAVE HUMIDITY MEASURING DEVICE WITH SWITCHABLE MEASURING RANGES
EP79104245A EP0011185B1 (en) 1978-11-11 1979-10-31 Microwave moisture measurement device with commutable measuring range

Publications (1)

Publication Number Publication Date
ATE304T1 true ATE304T1 (en) 1981-10-15

Family

ID=6054422

Family Applications (1)

Application Number Title Priority Date Filing Date
AT79104245T ATE304T1 (en) 1978-11-11 1979-10-31 MICROWAVE MOISTURE METER WITH SWITCHABLE MEASUREMENT RANGES.

Country Status (5)

Country Link
US (1) US4270083A (en)
EP (1) EP0011185B1 (en)
JP (1) JPS5567642A (en)
AT (1) ATE304T1 (en)
DE (2) DE2848993A1 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220123A1 (en) * 1982-05-28 1983-12-01 Total Feuerschutz GmbH, 6802 Ladenburg Method and device for measuring humidity
IL77207A (en) * 1985-12-03 1990-11-29 Benjamin Gavish Device and method for monitoring small displacements of a peak in a frequency spectrum
FR2619217B1 (en) * 1987-08-04 1989-11-10 Aerospatiale DEVICE FOR CONTINUOUSLY MEASURING THE RATE OF IMPREGNATION BY A SUBSTANCE OF CONDUCTIVE FIBERS OR NON-ELECTRICITY.
EP0325341B1 (en) * 1988-01-22 1992-05-13 United Kingdom Atomic Energy Authority Material characterisation
US4990858A (en) * 1989-05-25 1991-02-05 General Atomics Coaxial microwave asborption diagnostic
DE4004119A1 (en) * 1990-02-10 1991-08-14 Tews Elektronik Dipl Ing Manfr METHOD FOR MEASURING THE HUMIDITY OF A MEASUREMENT WITH THE AID OF MICROWAVES AND DEVICE FOR IMPLEMENTING THE METHOD
FR2661500B1 (en) * 1990-04-25 1994-01-07 Aerospatiale Ste Nationale Indle MICROWAVE CAVITY SUITABLE FOR MEASURING THE ELECTROMAGNETIC CHARACTERISTICS OF A FILIFORMED MATERIAL IN PROGRESS.
AU648585B2 (en) * 1990-10-02 1994-04-28 Commonwealth Scientific And Industrial Research Organisation Moisture detection using a radio frequency resonator
DE4211362C2 (en) * 1992-04-04 1995-04-20 Berthold Lab Prof Dr Device for determining material parameters by microwave measurements
US5473256A (en) * 1994-09-07 1995-12-05 Texaco Inc. Combination microwave waveguide and pressure barrier
US5838158A (en) * 1995-08-08 1998-11-17 Appleton Mills Measuring system for measuring the amount of dielectric in a web
EP0758085A3 (en) * 1995-08-08 1999-09-01 Appleton Mills Moisture detection apparatus and methods
US6163158A (en) * 1996-02-20 2000-12-19 Hauni Maschinenbau Ag Method of and apparatus for ascertaining at least one characteristic of a substance
US6204670B1 (en) * 1997-06-09 2001-03-20 National Research Development Corp. Process and instrument for moisture measurement
DE29716639U1 (en) * 1997-09-16 1999-01-21 Tews Elektronik, 22459 Hamburg Microwave stray field sensor for moisture and / or density measurement
CN100510724C (en) * 2003-07-31 2009-07-08 王子制纸株式会社 Method and device for measuring moisture content
DE102007029908A1 (en) * 2007-06-28 2009-01-02 Tews Elektronik Dipl.-Ing. Manfred Tews Apparatus and method for mass and / or moisture measurement of dielectric objects
US8629681B1 (en) * 2009-05-18 2014-01-14 The United States Of America, As Represented By The Secretary Of Agriculture Microwave sensor and algorithm for moisture and density determination
DE102009024203B4 (en) * 2009-06-08 2013-01-24 Materialforschungs- und -prüfanstalt an der Bauhaus-Universität Weimar Microwave sensor and method for determining dielectric material properties
FR2952719B1 (en) * 2009-11-18 2012-01-13 Imiwave MICROWAVE CONTACTLESS MEASUREMENT DEVICE FOR HUMIDITY RATE IN MATERIAL AND ASSOCIATED METHOD
DE102011083051A1 (en) * 2011-09-20 2013-03-21 Hauni Maschinenbau Ag Mikrowellenresonatorgehäuse
DE102013213936A1 (en) * 2013-07-16 2015-01-22 Hauni Maschinenbau Ag Arrangement and method for checking rod-shaped articles of the tobacco-processing industry
JP6376214B2 (en) * 2014-03-26 2018-08-22 王子ホールディングス株式会社 Device for measuring moisture in liquid and method for measuring moisture
CN104267047B (en) * 2014-09-19 2016-09-28 国家电网公司 Microwave cavity for Chu the moisture film of steam wetness measurement
CN104977311B (en) * 2015-06-18 2017-12-26 四川莱源科技有限公司 Radar type microwave water measurer device
JP6551052B2 (en) * 2015-08-25 2019-07-31 王子ホールディングス株式会社 Apparatus and method for measuring moisture content in powder
TWI810772B (en) * 2021-12-30 2023-08-01 日揚科技股份有限公司 A fast annealing equipment

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1111384A (en) * 1963-12-05 1968-04-24 Microwave Instr Ltd Microwave apparatus for measuring moisture content
GB1106185A (en) * 1964-05-29 1968-03-13 Nils Bertil Agdur Device for measuring a property of a material
GB1030834A (en) * 1965-02-11 1966-05-25 Kenneth Edney Hancock Method and apparatus for measurement of moisture content
DE2031795A1 (en) * 1970-06-26 1972-01-13 Siemens Ag Cavity resonator
US3883798A (en) * 1972-05-04 1975-05-13 Hoffmann La Roche Free flow resonant cavity measuring apparatus
DE2340130C3 (en) * 1973-08-08 1979-08-09 Bayer Ag, 5090 Leverkusen Method for determining the water content of thin, flat materials
JPS5718136B2 (en) * 1973-11-27 1982-04-15
DE2529829A1 (en) * 1975-07-04 1977-01-27 Hartmann & Braun Ag CIRCUIT ARRANGEMENT FOR A MICROWAVE GAS ANALYZER WITH A CAVITY RESONATOR
DE2714094C3 (en) * 1977-03-30 1980-04-17 Bayer Ag, 5090 Leverkusen Device for determining the water content of isotropic materials with the aid of microwave absorption

Also Published As

Publication number Publication date
JPS5567642A (en) 1980-05-21
DE2961024D1 (en) 1981-12-24
EP0011185A1 (en) 1980-05-28
DE2848993A1 (en) 1980-05-22
US4270083A (en) 1981-05-26
EP0011185B1 (en) 1981-10-14

Similar Documents

Publication Publication Date Title
ATE304T1 (en) MICROWAVE MOISTURE METER WITH SWITCHABLE MEASUREMENT RANGES.
KR850002387A (en) Moisture measuring device such as skin
JPS57134798A (en) Measring apparatus
SE7410106L (en)
JPS5639447A (en) Device for measuring water content in sheet material
GB1351964A (en) Providing a measure of cross-sectional area of an object
SU1013829A1 (en) Uhf device for measuring humidity
SU430514A1 (en) AUTOMATIC DEVICE RADIOMETRIC TYPE FOR DETERMINING THE RELATION OF SIGNAL / NOISE OUTPUT OF THE RECEIVER DURING THE PULSE SIGNAL
SU754270A1 (en) Microwave moisture content meter
SU425096A1 (en) DEVICE FOR MEASUREMENT OF DIELECTRIC PERMITTIVITY OF SUBSTANCES
SU519651A1 (en) Device for measuring dielectric constant materials
SU659995A1 (en) Arrangement for measuring amplitude-frequency characteristics of microwave time-delay lines
SU1101751A1 (en) Device for measuring power emitted by radio transmitter
SU389467A1 (en) DEVICE FOR MEASURING FLUCTUATION OF FREQUENCIES_ .SIGNAL
JPS5636024A (en) Measuring device for high-frequency modulated ray
SU824079A1 (en) Microwave quality factor meter
SU317320A1 (en)
VELCEANU Observations on some acoustic methods used in studying the elastic properties of metals(resonant frequency measurements on metal beams)
SU115514A1 (en) Device for measuring the dielectric constant of materials at ultrahigh frequencies
SU873157A1 (en) Device for measuring uhf resonator quality factor
SU1187280A1 (en) Device for determining mismatch degree of communication cables
SU1636796A2 (en) Measurer for parameters of dielectrics
SU1642260A1 (en) Device for measuring vibration parameters
GB715415A (en) Improvements in and relating to measuring apparatus
SU444133A1 (en) Device for measuring the quality factor of external resonators of electron-beam devices

Legal Events

Date Code Title Description
EEIH Change in the person of patent owner
REN Ceased due to non-payment of the annual fee