SENSOR MODULE INCLUDING MAGNETIC SENSOR AND TEMPERATURE COMPENSATION METHOD IN ROTATION ANGLE DETECTION USING MAGNETIC SENSOR

To detect a rotation angle of a detected object while suppressing deterioration of accuracy due to a fluctuation of environment temperature.SOLUTION: A temperature compensation method in rotation angle detection using a magnetic sensor comprises: fixing, using a fixing material (40), a magnetic sens...

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Bibliographische Detailangaben
Hauptverfasser: ITO TAKASUKE, TAKIGUCHI TOMOYUKI, KONO SADAYUKI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To detect a rotation angle of a detected object while suppressing deterioration of accuracy due to a fluctuation of environment temperature.SOLUTION: A temperature compensation method in rotation angle detection using a magnetic sensor comprises: fixing, using a fixing material (40), a magnetic sensor (60), where multiple detection elements (61, 62) changing characteristics according to a direction of a magnetic field are respectively arranged at different rotation angle positions with respect to a detected object (15) rotating in the direction of the magnetic field; pre-storing correction information for each one of the multiple detection elements of the magnetic sensor fixed by the fixing material, in accordance with a temperature error to be generated in each one of the detection elements; individually correcting signals to be output by respective detection elements, referring the correction information according to environment temperature; and then, acquiring and output a detection value corresponding to a rotation angle of a detected object.SELECTED DRAWING: Figure 3 【課題】被検出物の回転角度を、環境温度の変動による精度の低下を抑制して検出する。【解決手段】磁界の方向により特性が変化する複数の検出素子(61,62)を、磁界の方向を回転する被検出物(15)に対して異なる回転角度位置にそれぞれ配置した磁気センサ(60)を固定材(40)を用いて固定する。固定材によって固定された磁気センサの複数の検出素子のそれぞれに生じ得る温度誤差に対応して、各検出素子毎の補正用の情報を予め記憶しておき、環境温度に従って、補正用の情報を参照することにより、各検出素子の出力する信号を個別に補正した上で、被検出物の回転角度に対応した検出値を求めて出力する。【選択図】図3