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:
Aug. 13, 2019
Filed:
Dec. 19, 2017
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Kohei Hiromatsu, Ushiku, JP;
Shiho Izumi, Hitachinaka, JP;
Yasuhiko Kanari, Kasumigaura, JP;
Daito Sakai, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
When a work implement is actuated in such a manner that a work point is located at each of a plurality of positions on a datum line, a first work point position computing section calculates a position of the work point at each of the plurality of positions. A calibration value computing section calculates calibration values of angle conversion parameters (αbm, βbm, αam, βam, αbk, βbk), dimension parameters (Lbm, Lam, Lbk), and line parameters (tilt tan θ, intercept Zline) using the fact that the positions of the work point at each of the plurality of positions calculated by the first work point position computing section can satisfy a linear equation indicating a datum line. A parameter update section reflects the calibration values calculated by the calibration value computing section in computation by a corresponding computing section that is one of the angle computing section and the first work point position computing section.