To suppress degradation of detection precision generated by a difference in a power supply frequency of a power transmission line.SOLUTION: In a control section 36 of a touch detection device 26, 50 Hz or 60 Hz is set to a measurement frequency Fa and on the basis of a period Ta of the measurement frequency Fa, a measurement cycle tc and an averaging period tav for calculating a sectional average value are set. In the control section 36, an averaging interval ti of two averaging sections is set to an interval capable of suppressing one sectional average value by the other sectional average value in the frequency component of 50 Hz and 60 Hz and the average measurement value as a detection value is calculated from the two sectional average values obtained at the averaging interval ti. Thus, the touch detection device 26 can suppress a noise component of a power supply frequency of the same 50 Hz as the measurement frequency Fa and can suppress a noise component of a power supply frequency of different 60 Hz from the measurement frequency Fa, thereby achieving highly precise touch detection.SELECTED DRAWING: Figure 3

    【課題】送電線の電源周波数が異なることにより生じる検出精度の低下を抑制する。【解決手段】タッチ検出装置26のコントロール部36には、50Hz又は60Hzが計測周波数Faに設定され、計測周波数Faの周期Taに基づいて、計測サイクルtc、及び区間平均値を演算する平均化期間tavが設定されている。また、コントロール部36には、2つの平均区間の平均化間隔tiが50Hz及び60Hzの周波数成分について一方の区間平均値を他方の区間平均値により抑制し得る間隔に設定され、平均化間隔tiで得られる2つの区間平均値から検出値としての平均計測値が演算される。これにより、タッチ検出装置26では、計測周波数Faと同じ50Hzの電源周波数のノイズ成分を抑制できると共に、計測周波数Faとは異なる60Hzの電源周波数のノイズ成分を抑制でき、タッチ検出を高精度で行うことができる。【選択図】図3


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    Title :

    TOUCH DETECTION DEVICE


    Additional title:

    タッチ検出装置


    Contributors:

    Publication date :

    2023-04-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / B62D MOTOR VEHICLES , Motorfahrzeuge



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