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. 25, 2022
Filed:
Sep. 01, 2021
Kyoto University, Kyoto, JP;
Tokyo Rope Mfg. Co., Ltd., Tokyo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Kazuhiko Tsukada, Kyoto, JP;
Toshiyuki Moriya, Chiba, JP;
Hiroaki Itoi, Ibaraki, JP;
Sadanori Shiiki, Ibaraki, JP;
Masashi Oikawa, Osaka, JP;
Shinji Nakaue, Osaka, JP;
KYOTO UNIVERSITY, Kyoto, JP;
TOKYO ROPE MFG. CO., LTD., Tokyo, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A tension measuring method installs a reel having a cylindrical coil forming part on a cable to be measured, forms a coil by winding a conductor around the coil forming part, measures a magnetic hysteresis loop of the cable by supplying a current to the coil to generate a magnetic field, and computes a tension of the cable using a parameter determined from the hysteresis loop. A magnetic field sensor and a magnetic flux sensor are provided inside a through hole in the coil forming part, and the cable is positioned inside the through hole. The magnetic field is varied so that the hysteresis loop includes a near-saturation magnetization region, to measure the hysteresis loop using the sensors. The parameter is selected from a magnetic flux or a magnetic flux density, a remanent magnetization, a coercivity, a magnetic permeability, and a hysteresis loss in the near-saturation magnetization region.