JPS57104844A - Microwave moisture measuring device - Google Patents
Microwave moisture measuring deviceInfo
- Publication number
- JPS57104844A JPS57104844A JP18044380A JP18044380A JPS57104844A JP S57104844 A JPS57104844 A JP S57104844A JP 18044380 A JP18044380 A JP 18044380A JP 18044380 A JP18044380 A JP 18044380A JP S57104844 A JPS57104844 A JP S57104844A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide pipe
- microwave
- stage
- waveguide
- measuring device
- 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.)
- Pending
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)
- 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)
Abstract
PURPOSE:To eliminate the need for a given place and to provide a simple way to measure moistures of various types of materials, by a method wherein a microwave oscillator and receiver are mounted at one end of a waveguide pipe divided into an upper and a lower stage and are separately positioned at an upper stage and a lower stage. CONSTITUTION:An electromagnetic wave generated by a gun oscillator 3 is propagated through an upper waveguide 16 via a buffer resistor 14, and a part thereof leaks to the outside from a radio leaking slit in an E-surface of a waveguide pipe to be attenuated by an object 17 to be measured. The other end of a two-stage structure waveguide pipe 13 is structured such that a horizontal boundary wall 18 is removed, whereby a microwave power 4 is propagated through a lower waveguide pipe 19 to enter a receiver 7 as it is attenuated by the object 17 to be measured, and is converted into a DC power by a detection diode 6. The output is fed to an indicator 11 via an amplification circuit 10 and is converted into a percentage of moisture content for the indication. This permits simplification of a structure of a microwave moisture measuring device and miniaturization of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18044380A JPS57104844A (en) | 1980-12-22 | 1980-12-22 | Microwave moisture measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18044380A JPS57104844A (en) | 1980-12-22 | 1980-12-22 | Microwave moisture measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57104844A true JPS57104844A (en) | 1982-06-30 |
Family
ID=16083317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18044380A Pending JPS57104844A (en) | 1980-12-22 | 1980-12-22 | Microwave moisture measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57104844A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0353884A2 (en) * | 1988-08-04 | 1990-02-07 | Imperial Chemical Industries Plc | Microwave moisture sensing arrangement |
-
1980
- 1980-12-22 JP JP18044380A patent/JPS57104844A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0353884A2 (en) * | 1988-08-04 | 1990-02-07 | Imperial Chemical Industries Plc | Microwave moisture sensing arrangement |
| JPH0288949A (en) * | 1988-08-04 | 1990-03-29 | Imperial Chem Ind Plc <Ici> | Microwave psychrometer |
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