Valeo Schalter Und Sensoren Gmbh

Other

Marek Lewandowski

Michael Hallek

A network communication system for a vehicle includes a communication bus, a first communication device, and a plurality of second communication devices which are connected to one another via the communication bus. The first communication device includes a bias voltage source for generating a constant bias voltage on the communication bus, the first communication device includes a current measurement apparatus for capturing the current on the communication bus, the network communication system includes a terminating resistor which is arranged in parallel with the plurality of second communication devices, the first communication device includes a first modulation apparatus for modulating a current set by the bias voltage and the terminating resistor on the communication bus, each second communication device includes a second voltage measurement apparatus for capturing a voltage at the terminating resistor and a second modulation apparatus for modulating the current set by the bias voltage and the terminating resistor.

Network communication system with bidirectional current modulation for transmitting data

The invention relates to a method for operating a sensor arrangement () in a motor vehicle (), wherein

Method for operating a sensor arrangement in a motor vehicle on the basis of a DSI protocol

The invention relates to a method for operating a sensor arrangement () in a motor vehicle () based on a DSI protocol, wherein

The invention relates to a method for operating a sensor arrangement () in a motor vehicle () on the basis of a DSI protocol in a Power Function Class mode, wherein the sensor arrangement () has a central unit () and a multiplicity of sensor units (S, S, . . . , S), the central unit and the sensor units are connected to one another in series by means of a bus cable (), the sensor units each have a test resistor (R, R, . . . , R) connected in series with the bus cable, an electrical test load (L, L, . . . , L) that can be connected to the bus cable, and an address counter (A, A, . . . , A), having the following steps: transferring information between the central unit (Z) and the sensor units by means of a predetermined lower voltage (V) and a predetermined upper voltage (V) as the respective bus voltage (U) in communication phases, supplying the sensor units with electrical energy by means of the central unit in energy supply phases in which an idle voltage (V) is applied as the bus voltage, which is at least 1 V greater than the upper voltage, assigning a respective address to the individual sensor units in a previous address assignment phase by means of an address assignment voltage as the bus voltage, which is at least 1 V greater than the upper voltage.

The DSI protocol (distributed system interface) that relates to the bus communication in sensor arrangements is known from the prior art. Methods are proposed for operating a sensor arrangement () on the basis of the DSI protocol in order to consequently be able to operate, in particular in an advantageous manner, active sensor units (A-F) having a transmitter () and a receiver (). In particular, the use of three part phases is proposed for the communication between the processing unit () and the active sensor unit (A-F), namely a CRM phase () for the bidirectional communication between the processing unit () and the active sensor unit (A-F), a power phase () for the transmission of energy from the processing unit () to the active sensor units (A-F) and a PDCM phase for the unidirectional transmission of data from the active sensor unit (A-F) to the processing unit (). Furthermore, it is proposed in a CRM phase () to grant at least one active sensor unit (A-F) the release for a supplementary time slot (G,H) in the PDCM phase () with the result that this active sensor unit (A-F) in the PDCM phase has two time slots (A-H) available for the communication with the processing unit ().

Methods for operating a sensor arrangement on the basis of a DSI protocol in a motor vehicle and also a corresponding sensor arrangement in a motor vehicle

A method for operating a sensor arrangement in a motor vehicle on the basis of a DSI protocol is disclosed. The sensor arrangement has a central unit as a master and a plurality of sensor units, each having a receiver as slaves controlled by the master. The central unit and the sensor units are connected to a bus line and via the bus cable a communication takes place between the central unit and the sensor units. The method includes selecting a first group of sensor units by the central unit for a first measurement, assigning a first time slot or first time slots within a first cycle respectively to one of the sensor units from the first group by means of the central unit, and broadcasting corresponding first time slot information from the central unit to the sensor units.

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Bietigheim-Bissingen, Germany

Marek Lewandowski