GB1439375A - Microwave transmission arrangement for measuring water content - Google Patents

Microwave transmission arrangement for measuring water content

Info

Publication number
GB1439375A
GB1439375A GB3800973A GB3800973A GB1439375A GB 1439375 A GB1439375 A GB 1439375A GB 3800973 A GB3800973 A GB 3800973A GB 3800973 A GB3800973 A GB 3800973A GB 1439375 A GB1439375 A GB 1439375A
Authority
GB
United Kingdom
Prior art keywords
bridge
measuring
aug
moisture
micro
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
Application number
GB3800973A
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.)
Bayer AG
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
Publication of GB1439375A publication Critical patent/GB1439375A/en
Expired legal-status Critical Current

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
    • 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
    • G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response

Landscapes

  • Physics & Mathematics (AREA)
  • General 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)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1439375 Electro-physical measurement - moisture BAYER AG 10 Aug 1973 [12 Aug 1972] 38009/73 Heading G1N In a micro-wave bridge arrangement for measuring the moisture in sheet material the micro-wave generator is FREQUENCY MODULATED so that interference due to reflections (varying with the sheet position) are averaged out. Typically the generator 1 may vary over a range of 8-12À5 Gc/s at a modulation frequency of 100 c/s and after regulation at 3, feed a frequency multiplier 4 providing a range of 16 to 25 Gc/s to the bridge. As shown the comparison and measuring arms are fed through a directional coupler 7. The measuring branch includes transmitting and receiving horns 8, 10 with the sample arranged between them preferably at the "angle-ofpolarization". Signals from the detectors 12, 13 are compared at 15 and the bridge is balanced by a preferably-servo-controlled damping element 11 whose position is indicated at 17. Alternatively the damper may be fixed and the out-of-balance voltage at 15 indicated. In a second embodiment Fig. 5 (not shown) the supply is 0-360 degrees phase-modulated (the bridge circuit being the same). Reference has been directed by the Comptroller to Specification 1248615
GB3800973A 1972-08-12 1973-08-10 Microwave transmission arrangement for measuring water content Expired GB1439375A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722239848 DE2239848A1 (en) 1972-08-12 1972-08-12 MICROWAVE TRANSMISSION ARRANGEMENT FOR MEASURING THE WATER CONTENT

Publications (1)

Publication Number Publication Date
GB1439375A true GB1439375A (en) 1976-06-16

Family

ID=5853474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3800973A Expired GB1439375A (en) 1972-08-12 1973-08-10 Microwave transmission arrangement for measuring water content

Country Status (4)

Country Link
CH (1) CH560896A5 (en)
DE (1) DE2239848A1 (en)
FR (1) FR2195793B1 (en)
GB (1) GB1439375A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182149A (en) * 1985-10-25 1987-05-07 Coal Ind Improved moisture meter
WO1990009578A1 (en) * 1989-02-14 1990-08-23 Commonwealth Scientific And Industrial Research Organisation Microwave scanning apparatus
US5619143A (en) * 1989-02-14 1997-04-08 Commonwealth Scientific And Industrial Research Organisation Microwave scanning apparatus
CN114199900A (en) * 2021-12-14 2022-03-18 西安石油大学 Crude oil water content measuring device based on Vivaldi antenna

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981082A (en) * 1975-05-30 1976-09-21 Molins Machine Company, Inc. Apparatus and method for monitoring the moisture gradient in a moving web
DE2808739C2 (en) * 1978-03-01 1983-11-10 Bergwerksverband Gmbh, 4300 Essen Rapid measurement method for determining the concentration of the polar component of otherwise non-polar substances
US5315258A (en) * 1989-01-13 1994-05-24 Kajaani Elektroniikka Oy Method and apparatus for determining the moisture content of a material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182149A (en) * 1985-10-25 1987-05-07 Coal Ind Improved moisture meter
US4788853A (en) * 1985-10-25 1988-12-06 Coal Industry (Patents) Limited Moisture meter
GB2182149B (en) * 1985-10-25 1989-12-20 Coal Ind Improved moisture meter
WO1990009578A1 (en) * 1989-02-14 1990-08-23 Commonwealth Scientific And Industrial Research Organisation Microwave scanning apparatus
US5619143A (en) * 1989-02-14 1997-04-08 Commonwealth Scientific And Industrial Research Organisation Microwave scanning apparatus
CN114199900A (en) * 2021-12-14 2022-03-18 西安石油大学 Crude oil water content measuring device based on Vivaldi antenna

Also Published As

Publication number Publication date
FR2195793B1 (en) 1978-08-11
CH560896A5 (en) 1975-04-15
FR2195793A1 (en) 1974-03-08
DE2239848A1 (en) 1974-02-21

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees