| 摘要 |
The device has a detector for an actuator coupled to a switch, a transmission element for emitting electromagnetic signals and an evaluation circuit that produces a switch actuation signal depending on electrical signals induced in a receiver element. The evaluation circuit has an integrator coupled to a timer for detecting electrical energy induced in the receiver element following emission and a comparator that provides the switching signal. The device (1) has a detector for an actuator (5) coupled to a switch (13), a transmission element (2) for emitting electromagnetic signals and an evaluation circuit (4) that produces an actuation signal for activating the switch depending on electrical signals induced in a receiver element. The evaluation circuit has an integrator coupled to a timer for detecting electrical energy induced in the receiver element during a period following emission and a comparator that provides the switching signal if the quantity of energy exceeds or falls below a predefined threshold. |
