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:
May. 14, 2019
Filed:
Mar. 12, 2015
Seiko Epson Corporation, Shinjuku-ku, JP;
Yimei Ding, Shiojiri, JP;
Daisuke Sugiya, Chino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Disclosed are an error estimation method capable of reducing a processing load, and estimating errors of indexes indicating a state of a moving object with high accuracy by using a signal from a positioning satellite. In one aspect, the error estimation method includes calculating a coordinate transformation matrix between a first coordinate system with a first sensor mounted on a moving object as a reference and a second coordinate system with the moving object as a reference, at a predetermined timing in a cycle of, converting one of an azimuth angle of the moving object based on a detection result in the first sensor and an azimuth angle of the moving object based on a detection result in the second sensor by using the coordinate transformation matrix in a case where the detection result in the second sensor receiving a signal from a positioning satellite is obtained, and estimating errors of indexes indicating a state of the moving object by using a difference between the converted azimuth angle and the other azimuth angle at the predetermined timing after a timing at which the detection result in the second sensor is obtained.