The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1987
Filed:
Dec. 11, 1985
Seiichiro Kiyobe, Tokyo, JP;
Tokio Hirano, Tokyo, JP;
Yokogawa Hokushin Electric Corporation, Tokyo, JP;
Abstract
A microwave moisture sensor operates on the principle that an emitted microwave is attenuated in rotary resonance with water molecules. The microwave moisture sensor includes measurement and reference signal systems sharing a microwave oscillator, a detector and other components, means for calculating the ratio of the signals from the respective systems, and an AGC circuit means for keeping the reference signal from the reference signal system at a predetermined level, so that drifts of the microwave oscillator, detector and other components will be cancelled and thus increased measuring accuracy will result. Furthermore, the microwave moisture sensor measure the basis weight and temperature of a material being measured, and processes the measured values according to predetermined moisture percentages free from adverse influences of the basis weight and temperature and thus increase the degree of measurement accuracy.