EP0353884A2
Expired / Lapsed
EP
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Microwave moisture sensing arrangement
Assignee: Imperial Chemical Industries Ltd
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Filing: 1989-07-12
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Granted: —
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Expires: 2009-07-12
Abstract
Abstract A microwave moisture sensing arrangement comprises an oscillator and a detector and a microwave strip line sensor connected between the two. The sensor is inserted into bulk, penetrable materials. The detector detects a change in received signal due to absorption of radiation from the sensor. Moisture content of the material is determined by calibration.
Inventors
- 👤 Frank Thompson
- 👤 John Robin Paul Clarke
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 16:40
CPC Classifications
G; G01; G01N; G01N22/00; G01N22/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A microwave moisture sensing arrangement comprising an oscillator and a detector and a microwave strip line sensor connected between said oscillator and said detector and adapted for insertion of said strip line sensor into bulk, penetrable materials whereby the detector detects a change in received signal due to absorption of radiation from the sensor.
Claim 2
Dependent Claim
54 words
A microwave moisture sensing arrangement comprising an oscillator and a detector and a microwave strip line sensor connected between said oscillator and said detector and adapted for insertion of said strip line sensor into bulk, penetrable materials whereby the detector detects a change in received signal due to absorption of radiation from the sensor.
Claim 3
Dependent Claim
31 words
An arrangement according to claim 1, in which the oscillator and detector are contained in a housing and the strip line sensor is carried on a probe projecting from said housing.
Claim 4
Dependent Claim
29 words
An arrangement according to claim 1 or claim 2, in which the strip line sensor is connected to the oscillator and detector by waveguide or other transmission line means.
Claim 5
Dependent Claim
23 words
An arrangement according to any one of claims 1 to 3, in which said detector detects attenuation of microwave signals through said sensor.
Claim 6
Dependent Claim
24 words
An arrangement according to any one of claims 1 to 4, in which said detector detects phase change of microwave signals through said sensor.
Claim 7
Dependent Claim
14 words
An arrangement according to claim 5, in which said detector comprises a microwave mixer.
Claim 8
Dependent Claim
16 words
An arrangement according to claim 6, in which said microwave mixer comprises a double balanced mixer.
References Cited (Backward Citations)
No citation records indexed.
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