公开(公告)号：US20230065022A1

公开(公告)日：2023-03-02

申请号：US18054265

申请日：2022-11-10

Applicant: DENSO CORPORATION

Inventor： Atsushi KOBAYASHI ,  Michihiro MAKITA ,  Yusuke KARIYA

IPC: G01D5/245

Abstract: A rotation detection device includes: a detector arranged with a gap to a rotating body in which rotation position information is periodically provided at regular intervals, and detecting a magnetic change as a rotation position of the rotating body; and a signal processor acquiring the rotation position information. The detector has first and second magnetic elements arranged with an interval of a/2 in a rotation direction. Each regular interval is defined as a. The first magnetic element outputs a first signal having a period corresponding to the regular intervals. The second magnetic element outputs a second signal having an opposite phase to the first signal and the period. The signal processor acquires a differential signal between the first and second signals as the rotation position information.