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. 04, 2012
Filed:
Feb. 18, 2011
Mikio Bando, Mito, JP;
Katsuaki Tanaka, Hitachinaka, JP;
Yukihiro Kawamata, Hitachi, JP;
Toshiyuki Aoki, Hitachi, JP;
Mikio Bando, Mito, JP;
Katsuaki Tanaka, Hitachinaka, JP;
Yukihiro Kawamata, Hitachi, JP;
Toshiyuki Aoki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A location estimation system includes: a position measurement unit that receives position measurement signals from a plurality of sources of emission, and calculates position information of a first mobile object; a distance measurement unit that measures a distance from the first mobile object and to a second mobile object; a relationship determination unit that determines presence or absence of a relationship between the first mobile object and the second mobile object based upon relative position of the second mobile object based upon the distance, and selects position measurement signals from sources of emission that are different from the sources of emission of the position measurement signals received by the first mobile object; a position correction unit that corrects a position of the first mobile object based upon the position measurement signals received by the first mobile object and the position measurement signals selected by the relationship determination means.