SE9000065D0 - 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
- SE9000065D0 SE9000065D0 SE9000065A SE9000065A SE9000065D0 SE 9000065 D0 SE9000065 D0 SE 9000065D0 SE 9000065 A SE9000065 A SE 9000065A SE 9000065 A SE9000065 A SE 9000065A SE 9000065 D0 SE9000065 D0 SE 9000065D0
- Authority
- SE
- Sweden
- Prior art keywords
- signal
- measured
- water content
- component
- delta
- Prior art date
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
Abstract
PURPOSE: To at a high speed and continuously measure water content of a material by a method in which a microwave signal is fed into the material and the speed change of the signal passed is measured, based on the known interdependent relationship between the speed change of the signal and the water content of the material. CONSTITUTION: A directionality coupler 6 divides a microwaver signal into a first component I and a second component II, and the component I is fed to a transmitter 7 and the signal is fed into a material to be measured. A receiver 8 receives a microwave signal I passed through the material to be measured. The transmitter 7 and receiver 8 are disposed counter to each other across the material. On the way of passing the material, the signal I is decelerated more than the signal component II used as the reference amount in a mixer 9, and delayed in a time manner. The mixer 9 mixes the signals I, II to generate an intermediate frequency signal Δf, which is fetched out from an output gate IF to measure frequency of the signal Δf in a counter 3. Water content of the material to be measured can be acquired from this frequency based on the known interdependent relationship between the signal Δf and the water content.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI890201A FI84402C (en) | 1989-01-13 | 1989-01-13 | Method and apparatus for determining moisture content of the material |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9000065D0 true SE9000065D0 (en) | 1990-01-09 |
SE9000065L SE9000065L (en) | 1990-07-14 |
SE505241C2 SE505241C2 (en) | 1997-07-21 |
Family
ID=8527725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9000065A SE505241C2 (en) | 1989-01-13 | 1990-01-09 | 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) |
Families Citing this family (12)
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 |
CA2914187C (en) | 2013-06-28 | 2023-09-12 | Sensors & Software Inc. | System and method for measurement of material property using variable reflector |
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
Also Published As
Publication number | Publication date |
---|---|
FI890201A (en) | 1990-07-14 |
CA2007300A1 (en) | 1990-07-13 |
SE505241C2 (en) | 1997-07-21 |
JP3026223B2 (en) | 2000-03-27 |
FI84402C (en) | 1991-11-25 |
DE4000925A1 (en) | 1990-07-19 |
SE9000065L (en) | 1990-07-14 |
JPH02238348A (en) | 1990-09-20 |
FI890201A0 (en) | 1989-01-13 |
CA2007300C (en) | 2000-09-26 |
FI84402B (en) | 1991-08-15 |
DE4000925C2 (en) | 1998-01-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE9000065D0 (en) | METHOD AND APPARATUS FOR DETERMINING THE MOISTURE CONTENT OF A MATERIAL | |
US4675595A (en) | Method for measuring the moisture ratio of organic material, and apparatus herefor | |
SE9903348D0 (en) | Apparatus and method for detection of foreign bodies in products | |
JPS5686313A (en) | Ultrasonic flow speed/rate meter capable of automatic switching between transmission-type and reflection-type measuring modes | |
JPS5580061A (en) | Frequency measuring apparatus | |
GB1434882A (en) | Method of and apparatus for measuring the concentration of a substance in a moving web | |
JPS6457391A (en) | Sensor and method for detecting changes in number of object | |
JPS561347A (en) | Ultrasonic concentration-meter | |
JPS54143274A (en) | Frequency analyzer | |
JPS5574457A (en) | Concentration measuring device | |
JPS57100362A (en) | Ultrasonic wave measuring device | |
JPS5627669A (en) | Device for measuring azimuth | |
JPS5570737A (en) | Measuring method for ultrasonic wave suspension concentration | |
JPS6443767A (en) | Frequency discriminating device | |
JPS5320349A (en) | Measuring method for wave length dispersion of photo-fiber | |
JPS5551391A (en) | Time counter | |
JPS5551392A (en) | Time counter | |
JPS5311072A (en) | Phase constant measuring method | |
JPS5483868A (en) | Scattering parameter meter | |
JPS56153856A (en) | Measuring method for tertiary distortion noise of communication transmission line | |
JPS54135577A (en) | Frequency measuring apparatus | |
JPS54126495A (en) | Micro wave distance measuring unit | |
JPS54118719A (en) | Measurement method for crosstalk attenuation quantity | |
JPS54149672A (en) | Measuring apparatus of ultrasonic wave type | |
GB1259680A (en) | Method and apparatus for measurement of the phase of weak signals |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |