| 摘要 |
The invention relates to a capacitive proximity sensor, comprising - a first sensor electrode and a second sensor electrode, - a signal generator for providing a first and a second electric alternating signal, - a first load element which comprises a first and a second electric load, in which the first alternating signal by means of the first load can be fed to the first sensor electrode and the second alternating signal by means of the second load to the second sensor electrode, and wherein the electric loads each together with the capacitive load to be measured at the respective sensor electrode form a lowpass filter, and - a signal processing device, which is coupled with the first sensor electrode and with the second sensor electrode, and which is adapted to form a first measurement value from the push-pull portion of a first electric parameter tapped at the first sensor electrode and a second electric parameter tapped at the second sensor electrode. Also a method for the capacitive approximation detection with a capacitive proximity sensor according to the invention is provided. |
