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. 30, 2025
Filed:
Feb. 02, 2022
Murata Machinery, Ltd., Kyoto, JP;
MURATA MACHINERY, LTD., Kyoto, JP;
Abstract
A displacement detection device includes a detection signal processor including a first differential amplifier a to output a first AC signal acquired by synthesizing a cosine function and a minus cosine function, a second differential amplifier to output a second AC signal acquired by synthesizing a sine function and a minus sine function, and a processor to determine, at least at a start of use of the displacement detection device, a value that substantially indicates a phase displacement amount between an excitation signal and the first AC signal and the second AC signal. When detecting displacement, the processor is configured or programmed to perform an arctangent computation using values of the first and second AC signals acquired at a timing based on the value that is determined, and output relative displacement information of a scale with respect to a magnetic detection head.