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:
Sep. 22, 2015
Filed:
Jul. 27, 2012
Daigo Senkoji, Kawasaki, JP;
Hiroshi Yamakawa, Kawasaki, JP;
Ken Matsushiro, Kawasaki, JP;
Tomoharu Yamada, Kawasaki, JP;
Daigo Senkoji, Kawasaki, JP;
Hiroshi Yamakawa, Kawasaki, JP;
Ken Matsushiro, Kawasaki, JP;
Tomoharu Yamada, Kawasaki, JP;
MITUTOYO CORPORATION, Kanagawa, JP;
Abstract
A long-period vibration sensor includes an overdamped accelerometer including a magnet fixed to the inside of a casing, a detection coil disposed between magnetic poles formed due to the magnet, a bobbin configured to hold the detection coil, and a support spring configured to support the bobbin in the casing so that the bobbin can vibrate in a predetermined direction, a voltage being outputted from the detection coil when the bobbin is damped, a plurality of digital filters having different frequency characteristics from one another, a selection module configured to select one digital filter from the plurality of digital filters based on an output value of the voltage outputted from the overdamped accelerometer, and a correction module configured to correct the output value of the voltage outputted from the overdamped accelerometer using the digital filter selected by the selection module.