磁気素子制御装置、磁気素子制御方法及び磁気検出装置

Magnetic element control device, magnetic element control method, and magnetic detector

Abstract

【課題】時間分解型FG方式の磁気素子を用いた磁界平衡式の磁界検出を行う磁気素子制御装置であって、励磁信号または帰還信号に発生する信号歪みの影響を受けずに、装置の出力安定性を向上する。 【解決手段】励磁信号調整部1016が生成する励磁信号または帰還信号調整部1013が生成する帰還信号の少なくとも一方の信号に対して重畳する、予め調整済みの直流調整信号を出力する調整信号生成部(励磁コイル用調整信号生成部1100)を有し、励磁信号調整部1016または帰還信号調整部1013が、直流調整信号に基づいて励磁信号または帰還信号を生成して励磁コイルまたは帰還用コイルに印加し、検出信号比較部1012が検出する検出信号を、励磁信号のクロスオーバー歪みが発生している領域(非線形領域)に対してずらせて発生させる。 【選択図】図1
PROBLEM TO BE SOLVED: To provide a magnetic element control device for performing magnetic field equilibrium type magnetic field detection using a magnetic element of a time resolution type FG method, in which output stability of the device is improved without being affected by signal distortion occurring in an excitation signal or a feedback signal.SOLUTION: A magnetic element control device includes an adjustment signal generation section (an adjustment signal for excitation coil generation section 1100) that outputs a pre-adjusted DC adjustment signal to be superposed on at least one of an excitation signal generated by an excitation signal adjustment section 1016 or a feedback signal generated by a feedback signal adjustment section 1013. The excitation signal adjustment section 1016 or the feedback signal adjustment section 1013 generates an excitation signal or a feedback signal on the basis of the DC adjustment signal and applies it to an excitation coil or a feedback coil in order to allow a detection signal to be detected by a detection signal comparison section 1012 to occur apart from a region (a nonlinear region) where crossover distortion of the excitation signal occurs.

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    JP-2015145800-AAugust 13, 2015愛知製鋼株式会社, Aichi Steel Works Ltdmagnetic detector
    US-9739849-B2August 22, 2017Aichi Steel CorporationMagnetic field detecting device