CA2007300A1 - Method and apparatus for determining the moisture content of a material - Google Patents
Method and apparatus for determining the moisture content of a materialInfo
- Publication number
- CA2007300A1 CA2007300A1 CA 2007300 CA2007300A CA2007300A1 CA 2007300 A1 CA2007300 A1 CA 2007300A1 CA 2007300 CA2007300 CA 2007300 CA 2007300 A CA2007300 A CA 2007300A CA 2007300 A1 CA2007300 A1 CA 2007300A1
- Authority
- CA
- Canada
- Prior art keywords
- moisture content
- change
- velocity
- measured
- microwave signal
- 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.)
- Granted
Links
Classifications
-
- 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)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
In the method of the invention, a microwave signal is passed through a material whose moisture content is to be measured, the change in the velocity of the signal which has travelled through the material is measured and the moisture content is determined on the basis of the measured change and a known interdependence between the changes in the microwave signal velocity and the moisture content of the material. The apparatus comprises a transmitting device (1) which transmits a microwave signal through the material to be measured, and a detecting device {2) and a counting device (3) which measure the change of velocity of the signal transmitted through the material and determine the moisture content of the material on the basis of a known interdependence of the change of velocity of the microwave signal in question and change of moisture content of the material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI890201 | 1989-01-13 | ||
FI890201A FI84402C (en) | 1989-01-13 | 1989-01-13 | Method and apparatus for determining moisture content of the material |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2007300A1 true CA2007300A1 (en) | 1990-07-13 |
CA2007300C CA2007300C (en) | 2000-09-26 |
Family
ID=8527725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2007300 Expired - Lifetime CA2007300C (en) | 1989-01-13 | 1990-01-08 | Method and apparatus for determining the moisture content of a material |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP3026223B2 (en) |
CA (1) | CA2007300C (en) |
DE (1) | DE4000925C2 (en) |
FI (1) | FI84402C (en) |
SE (1) | SE505241C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3014254A4 (en) * | 2013-06-28 | 2017-05-17 | Sensors & Software Inc. | System and method for measurement of material property using variable reflector |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3160474B2 (en) * | 1994-09-12 | 2001-04-25 | 株式会社東芝 | Microwave densitometer |
DE19725305A1 (en) * | 1997-06-14 | 1998-12-17 | Micas Elektronik Gmbh U Co Kg | Method of determining the moisture content in an object |
FI104447B (en) * | 1998-07-10 | 2000-01-31 | Valmet Automation Inc | Method and instrument for measuring the gas content of a liquid substance |
JP2000111499A (en) | 1998-10-02 | 2000-04-21 | Toshiba Fa Syst Eng Corp | Microwave concentration-measuring device |
US6854322B2 (en) * | 2002-06-10 | 2005-02-15 | The Procter & Gamble Company | Directional coupler sensor |
US7151380B2 (en) * | 2004-08-06 | 2006-12-19 | Voith Paper Patent Gmbh | Microwave water weight sensor and process |
DE102004058641B4 (en) * | 2004-12-01 | 2007-03-01 | Agueeva, Olga, Dr. | Method for the continuous or discontinuous determination of the concentration of the constituents contained in a medium by means of evaluation of the microwaves permeating the medium |
DE102006052789B3 (en) * | 2006-11-09 | 2008-07-10 | Festo Ag & Co | Method and position measuring device for determining a position of a measuring object |
DE102014216466A1 (en) * | 2014-08-20 | 2016-02-25 | Bayerische Motoren Werke Aktiengesellschaft | Quantitative determination of the water content of materials |
CN104977312B (en) * | 2015-06-18 | 2017-10-13 | 四川莱源科技有限公司 | The method of testing of radar type microwave water measurer device |
DE102017202214B4 (en) | 2017-02-13 | 2019-06-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and arrangement for measuring properties of a material web |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3851244A (en) * | 1973-12-18 | 1974-11-26 | Electronic Ass Of Canada Ltd | Microwave moisture measuring apparatus |
NL8100250A (en) * | 1980-03-13 | 1981-10-01 | Halliburton Co | ACOUSTIC LOG SYSTEM WITH SWING ENERGY SOURCE. |
DE3150202A1 (en) * | 1981-12-18 | 1983-06-23 | Philips Patentverwaltung Gmbh, 2000 Hamburg | ARRANGEMENT FOR MEASURING THE HUMIDITY |
JPH0785062B2 (en) * | 1987-06-09 | 1995-09-13 | 建設省土木研究所長 | Method for measuring soil dry density by electromagnetic waves |
-
1989
- 1989-01-13 FI FI890201A patent/FI84402C/en not_active IP Right Cessation
-
1990
- 1990-01-08 CA CA 2007300 patent/CA2007300C/en not_active Expired - Lifetime
- 1990-01-09 SE SE9000065A patent/SE505241C2/en not_active IP Right Cessation
- 1990-01-12 JP JP2005402A patent/JP3026223B2/en not_active Expired - Lifetime
- 1990-01-15 DE DE4000925A patent/DE4000925C2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3014254A4 (en) * | 2013-06-28 | 2017-05-17 | Sensors & Software Inc. | System and method for measurement of material property using variable reflector |
US10247680B2 (en) | 2013-06-28 | 2019-04-02 | Sensors & Software Inc. | System and method for measurement of material property using variable reflector |
US10527560B2 (en) | 2013-06-28 | 2020-01-07 | Sensors & Software Inc. | System and method for measurement of material property using variable reflector |
Also Published As
Publication number | Publication date |
---|---|
JPH02238348A (en) | 1990-09-20 |
CA2007300C (en) | 2000-09-26 |
SE9000065L (en) | 1990-07-14 |
JP3026223B2 (en) | 2000-03-27 |
SE9000065D0 (en) | 1990-01-09 |
DE4000925A1 (en) | 1990-07-19 |
FI84402C (en) | 1991-11-25 |
SE505241C2 (en) | 1997-07-21 |
FI890201A (en) | 1990-07-14 |
DE4000925C2 (en) | 1998-01-22 |
FI890201A0 (en) | 1989-01-13 |
FI84402B (en) | 1991-08-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |