| 摘要 |
Two capacitive sensor components (5, 6) are incorporated, of which the second is arranged in connection with the first. The detector (22) detects potential alteration in the first sensor component and the second capacitive component comprises a drive located on one side of the first component. The detecting area is limited to that located on the other side of the first sensor component. The drive component is directly driven by the drive signal and the first sensor component receives a voltage feed through capacitive coupling with the drive unit and forms a capacitive voltage divider for the drive signal, whose voltage division is altered dependent upon whether the drive signal, whose voltage division is altered dependent upon whether the object is present or not. A second sensor component is driven by a second drive signal, which is in counter phase in relation to the first drive signal. |
