JPS5575638A - Water content sensor using microwave - Google Patents

Water content sensor using microwave

Info

Publication number
JPS5575638A
JPS5575638A JP14791778A JP14791778A JPS5575638A JP S5575638 A JPS5575638 A JP S5575638A JP 14791778 A JP14791778 A JP 14791778A JP 14791778 A JP14791778 A JP 14791778A JP S5575638 A JPS5575638 A JP S5575638A
Authority
JP
Japan
Prior art keywords
diode
water content
waveguide
output
coaxial
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
Application number
JP14791778A
Other languages
Japanese (ja)
Inventor
Katsuhiro Kimura
Akira Endo
Hiroshi Morozumi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14791778A priority Critical patent/JPS5575638A/en
Publication of JPS5575638A publication Critical patent/JPS5575638A/en
Pending legal-status Critical Current

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  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

PURPOSE: To enable accurate measurement with inexpensive unit, locating the waveguide at the both ends of rod shape dielectric substance, receiving high frequency signal from one waveguide with another waveguide, and measuring water content for such as unhulled rice from the attenuation of signal.
CONSTITUTION: The gun diode 10 and the monitor diode 12 are provided at the transmission side, the reception diode 13 is placed at the reception side, by opposing the dielectric rod antenna less in high frequency loss. The output of the diode 10 passes through the coaxial circuit 17 and is fed to the polystyrene rod 21 via the coaxial circular waveguide converter 19, of which conversion characteristics are best adjusted at the coaxial tuning circuit 18. The output of the diode 12 and the output of the diode 13 attenuated with unhulled rice 1 are displayed on the water content display section 9 via the differential amplifier 16 for the water content. With this system, since the change in the characteristics is greater in comparison with the change in the water content of unhulled rice, the measured accuracy can be increased.
COPYRIGHT: (C)1980,JPO&Japio
JP14791778A 1978-12-01 1978-12-01 Water content sensor using microwave Pending JPS5575638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14791778A JPS5575638A (en) 1978-12-01 1978-12-01 Water content sensor using microwave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14791778A JPS5575638A (en) 1978-12-01 1978-12-01 Water content sensor using microwave

Publications (1)

Publication Number Publication Date
JPS5575638A true JPS5575638A (en) 1980-06-07

Family

ID=15441010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14791778A Pending JPS5575638A (en) 1978-12-01 1978-12-01 Water content sensor using microwave

Country Status (1)

Country Link
JP (1) JPS5575638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290048A (en) * 1988-09-28 1990-03-29 Tokyo Metropolis Sludge-concentration measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290048A (en) * 1988-09-28 1990-03-29 Tokyo Metropolis Sludge-concentration measuring method

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