公开(公告)号：US20220404442A1

公开(公告)日：2022-12-22

申请号：US17774791

申请日：2020-11-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hideaki FUJIURA ,  Yoshiyuki SAITO

IPC: G01R33/09

Abstract: A signal processing method according to the present disclosure is for use in a signal processing system including a first magnetic detection unit, a second magnetic detection unit, and a processing unit. The signal processing method includes an angle calculating step and a failure diagnosis step. The angle calculating step includes transforming, by using an inverse trigonometric function, a sine signal, a cosine signal, and a tangent signal into a first angle signal, a second angle signal, and a third angle signal, respectively. The failure diagnosis step includes making a failure diagnosis of the first magnetic detection unit and the second magnetic detection unit by comparing with each other two or more pieces of angle information selected from first angle information, second angle information, and third angle information.

公开(公告)号：US20200158536A1

公开(公告)日：2020-05-21

申请号：US16748491

申请日：2020-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya TOMIDA ,  Takeshi UEMURA ,  Hideaki FUJIURA ,  Ryo OSABE

IPC: G01D5/14 ,  G01R35/00 ,  G01R33/09 ,  G01R33/07 ,  G01R15/20 ,  B62D15/02 ,  G01B7/30 ,  G01D5/16 ,  G01R33/06 ,  G01D5/12 ,  G01R33/02

Abstract: A magnetic sensor includes a magneto-resistive element configured to output a signal and a detection circuit configured to receive the signal. The detection circuit includes a regulator configured to supply a potential to the magneto-resistive element, a first current path configured to electrically connect the magneto-resistive element to the regulator, a second current path, a switch, and a diagnostic circuit connected to the second current path. The second current path includes, and is configured to electrically connect the magneto-resistive element to the regulator via the resistor. The switch is configured to select one of the first current path and the second current path, and electrically connect the magneto-resistive element to the regulator via the selected one of the first current path and the second current path.