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:
Oct. 13, 1987
Filed:
Jul. 10, 1986
Takahiro Okabe, Nagoya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An apparatus for measuring angular velocity is provided with a microwave oscillator, closed-loop waveguide and a microwave-detector. The microwave oscillator generates microwaves and the waveguide which may employ a magic tee as a part thereof separates the microwaves to propagate one and the other of separated microwaves clockwise and counterclockwise therethrough, respectively. The microwave detector mixes and microwave-detects one and the other of the separated microwaves propagated through said waveguide. When the waveguide is in rotary motion, frequencies or phases between the separated microwaves differ from each other in dependence upon the angular velocity and the microwave detector produces an output signal corresponding to the difference in frequencies or in phases between the separated microwaves. The angular velocity of the waveguide is measured by the use of output alternating signal component corresponding to the frequency difference between the separated microwaves or by the use of output direct current signal component corresponding to the phase difference between the separated microwaves.