A method for operating a sensor device in an automated vehicle based on the DSI protocol

摘要

The present invention relates to a method for operating a sensor device (2) in an automatic vehicle (1) based on the DSI protocol in the power function class mode, wherein the sensor device (2) includes a central unit (3) and a plurality of sensors. A test in which the unit (S1, S2, ..., SN) is provided, the central unit and the sensor unit are connected in series with each other by the bus cable (4), and the sensor units are connected in series with the bus cable, respectively. Resistors (RS1, RS2, ..., RN), electrical test loads (L1, L2, ..., LN) that can be connected to the bus cable, and address counters (A1, A2, ..., AN). The method comprises a central unit (VLOW-PWR) with a predetermined lower limit voltage (VLOW-PWR) and a predetermined upper limit voltage (VHIGH-PWR) as each bus voltage (UBus) in the following steps, that is, in the communication stage. In the step of transferring information between Z) and the sensor unit and the step of supplying electrical energy to the sensor unit by the central unit in the energy supply stage, the bus voltage (UBus) is at least 1 V higher than the upper limit voltage. It has a step in which an idle voltage (VIDLE) is applied and a step in which each address is assigned to an individual sensor unit by an address allocation voltage as a bus voltage at least 1V higher than the upper limit voltage in the previous address allocation step.