MAGNETIC SENSOR, ELECTRIC CONTROL DEVICE, CORRECTION METHOD, AND MAGNETIC SENSOR MANUFACTURING METHOD

To provide a magnetic sensor whose output signal has good linearity regardless of the direction of an applied external magnetic field, an electric control device using the same, a method of correcting the output signal of the magnetic sensor, and a method of manufacturing the magnetic sensor.SOLUTIO...

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Bibliographic Details
Main Author WATABE MORIYA
Format Patent
LanguageEnglish
Japanese
Published 16.06.2023
Subjects
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:To provide a magnetic sensor whose output signal has good linearity regardless of the direction of an applied external magnetic field, an electric control device using the same, a method of correcting the output signal of the magnetic sensor, and a method of manufacturing the magnetic sensor.SOLUTION: A magnetic sensor includes a magnetic detection unit that outputs a signal by applying a magnetic field and a signal correction unit that corrects a signal output from the magnetic detection unit. The magnetic detection unit includes a magnetoresistive element having a predetermined sensitivity axis. The signal correction unit corrects the signal using a correction value capable of reducing distortion error included in the signal when the magnetic field in a cross direction crossing the sensitivity axis is applied to the magnetoresistive element, and generates a corrected signal.SELECTED DRAWING: Figure 1 【課題】印加される外部磁場の方向に関わらず出力信号の線形性が良好な磁気センサ及びそれを用いた電気制御装置、並びに磁気センサの出力信号の補正方法及び磁気センサの製造方法を提供する。【解決手段】磁気センサは、磁場の印加により信号を出力する磁気検出部と、磁気検出部から出力される信号を補正する信号補正部とを備え、磁気検出部は、所定の感度軸を有する磁気抵抗効果素子を含み、信号補正部は、感度軸に交差する交差方向の磁場が磁気抵抗効果素子に印加されたときに信号に含まれる歪み誤差を低減可能な補正値を用いて信号を補正して、補正信号を生成する。【選択図】図１
Bibliography:Application Number: JP20210197456