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:
Nov. 19, 2024
Filed:
Mar. 25, 2020
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Shiho Izumi, Hitachinaka, JP;
Naoki Hayakawa, Ushiku, JP;
Kenta Nakagi, Tsukuba, JP;
Yasuhiko Kanari, Kasumigaura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
In a hydraulic excavator including a controller configured to calculate the magnitude of a position difference in a height direction between a construction target surface and a front work implement on the basis of the position of the construction target surface, the position of a machine main body which is calculated by a GNSS receiver, and the posture of the front work implement which is detected by a posture sensor. The controller records snapshot data of information about an operation sensor, a pressure sensor, the posture sensor, the GNSS receiver, and a radio in a predetermined period that is determined based on a time at which the magnitude of the position difference exceeds a predetermined value when the magnitude of the position difference exceeds the predetermined value, and diagnoses a cause of the magnitude of the position difference exceeding the predetermined value, on the basis of the snapshot data.