To provide a steering holding sensor which suppresses deterioration of inspection accuracy, and improves the inspection accuracy.SOLUTION: A steering holding sensor 100 comprises: a planar driven electrode 113 along a rim of a steering; a planar sensor electrode 112 opposite to the driven electrode 113; a sine wave generation part 41 supplying a sine wave voltage to the driven electrode 113; a charge amplifier 44 including a feedback capacitive element C11, detecting the change of a charging amount generated by an electrostatic capacitance of the sensor electrode 112, and outputting the change of the electric charge amount as the change of a voltage; a multiplication processing part 52 multiplying the sine wave voltage and an output voltage of the charge amplifier 44; an integrator 54 smoothing a multiplication result of the multiplication processing part 52 by integrating; and a holding determination part 56 determining the presence/absence of holding to a steering in accordance with a level of the multiplication result to be smoothed.SELECTED DRAWING: Figure 4

    【課題】検知精度の劣化を抑制し、検知精度を向上させるステアリング把持センサを提供する。【解決手段】ステアリング把持センサ100は、ステアリングのリムに沿う面状のドリブン電極113と、ドリブン電極113に対向する面状のセンサ電極112と、ドリブン電極113に正弦波電圧を供給する正弦波生成部41と、帰還容量素子C11を有し、センサ電極112の静電容量により発生する電荷量の変化を検出し、当該電荷量の変化を電圧の変化として出力する電荷アンプ44と、正弦波電圧と電荷アンプ44の出力電圧とを乗算する乗算処理部52と、乗算処理部52の乗算結果を積分することにより平滑化する積分器54と、平滑化された乗算結果のレベルに応じてステアリングへの把持の有無を判定する把持判定部56と、を備える。【選択図】図4


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    Title :

    STEERING HOLDING SENSOR AND HOLDING DETECTION METHOD


    Additional title:

    ステアリング把持センサおよび把持検知方法


    Contributors:

    Publication date :

    2021-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H03K PULSE TECHNIQUE , Impulstechnik / B62D MOTOR VEHICLES , Motorfahrzeuge



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