| 摘要 |
Arrangement at tiller truck, at which the communication between the handle and the truck itself is done via a serial connection, for instance a serial cable (31) between a logic unit in the handle and a logic unit in the truck itself. A drive control (7, 8) includes a number of Hall-sensors (19) that are successively activated by a magnet (17) that is in turn mechanically activated, so that via a logic circuit a varied drive current is fed to the drive motor. The Hall-sensors (18) are arranged on a circuit card 19 that also include logic circuits.A safety control (belly button) (9) that is arranged on the handle. If the belly button is depressed this is on an inward protruding arm (21) provided with a magnet 22 that at this movement is moved so that it will influence one or several Hall elements belonging to the drive control (7, 8), at which however the magnet (22) is on the other side of a circuit card (20) that carries the Hall elements. The logic of the circuit card is programmed to activate an anti squeeze operation where the truck moves away from the driver until the button has been released and has returned to its initial position.On the bottom side of the handle a key board (14) is arranged for authentication and starting and stopping of the truck instead of with a key.
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