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:
Jul. 30, 2024
Filed:
Dec. 03, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Eiichi Saito, Tokyo, JP;
Takahide Hirai, Tokyo, JP;
Seiji Watanabe, Tokyo, JP;
Daisuke Nakazawa, Tokyo, JP;
Daiki Fukui, Tokyo, JP;
Tomohiro Asamura, Tokyo, JP;
Yusuke Chikada, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An object of the invention is to provide a vibration damping system that can avoid the occurrence of resonance of an elevator rope regardless of the vibration frequency of a vibration source. A vibration damping system () includes a displacement amplifier (), a calculation unit (), and a displacement amplification control unit (). The displacement amplifier () is arranged along a given position in the longitudinal direction of the elevator rope. The displacement amplifier () amplifies a displacement due to vibration of the elevator rope based on a variable amplification factor. The calculation unit () calculates the natural frequency of the elevator rope. The displacement amplification control unit () controls the displacement amplification of the displacement amplifier () based on the natural frequency calculated by the calculation unit () and a preset vibration frequency.