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:
Feb. 14, 2019
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Akihiro Komori, Ibaraki, JP;
Eiichiro Ohata, Ibaraki, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
A manufacturing error and a mounting error of a position sensor used for detection of a rotation angle of a rotary shaft are appropriately calibrated to improve detection accuracy of the rotation angle. Therefore, an angle detection deviceincludes at least a first crank angle sensorand a second crank angle sensorprovided to be capable of detecting a rotation angle of a rotary shaft of a crankshaft, and includes: a gain correctorthat corrects at least any one of gains Gand Gof the first crank angle sensorand the second crank angle sensorsuch that an amplitude ya of a differential signal Sof the first crank angle sensoris equal to an amplitude yb of a differential signal Sof the second crank angle sensor; and a phase correctorthat corrects at least any one of a phase αa of the differential signal Sand a phase αb of the differential signal Ssuch that the phase αa of the differential signal Sis equal to the phase αb of the differential signal S