| 摘要 |
<p>The control has a control unit communicating with a sensor (7) and/or actuators (8) by a signal connection. The sensor is penetrated by a magnetic field during convergence of an object, where the magnetic field induces an electric signal (20) on the sensor. Information content of the signal is supplied to the control unit by the connection, which is a wireless connection between a transmitting unit (14) and a receiver unit. The transmitting unit is arranged close to the sensor, and energy supply of the transmitting unit is derived from the signal induced on the sensor.</p> |
