DSI Sensor Bus Power-Communication Alternation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sensor arrangements in motor vehicles using the DSI protocol face limitations in achieving high bandwidth communication due to the need for continuous energy supply during communication phases, which restricts the duration of these phases and affects data transmission efficiency.
Innovation Solution
The method alternates between power supply and communication phases, allowing for supplementary power supply phases if energy status information indicates a need, thereby extending communication phase duration and increasing bandwidth by ensuring energy availability during data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous maximum energy supply is provided during communication phases, then sensor units can operate without energy interruption, but bandwidth is limited due to restricted communication phase duration
Solution Approach 1:
The patent implements periodic power supply phases alternating with communication phases. During power supply phases, sensor units are supplied with electrical energy to charge their internal energy storage. During communication phases, sensor units operate using stored energy without continuous power supply. This periodic alternation allows extended communication phase duration while managing energy consumption, thereby increasing bandwidth.
2Productivity
If communication phase duration is extended to increase bandwidth, then data transmission efficiency improves, but sensor units may exhaust their energy supply and require interruption
Solution Approach 1:
The patent employs preliminary energy storage during power supply phases before communication phases begin. Sensor units accumulate electrical energy in advance within their internal energy storage components, ensuring sufficient energy is available for extended communication phases. This preliminary action prevents energy exhaustion during data transmission and maintains uninterrupted operation.
Solution Approach 2:
The master control unit monitors the energy status of sensor units and dynamically adjusts the alternation between power supply and communication phases. Based on feedback regarding energy levels, the system optimizes the duration and frequency of power supply phases to ensure sensor units maintain sufficient energy for extended communication operations, thereby guaranteeing reliable uninterrupted data transmission.
Data Source
AI summary
The invention relates to a method for operating a sensor arrangement (2) in a motor vehicle (1), whereinthe sensor arrangement (2) has a central unit (3) and a plurality of sensor units (S1, S2, S3),the central unit (3) and the sensor units (S1, S2, S3) are connected to a bus cable (4) andvia the bus cable (4) a communication takes place between the central unit (3) and the sensor units (S1, S2, S3) with the following steps:alternately carrying out a power supply phase (E) and a communication phase (K),supplying the sensor units (S1, S2, S3) with energy in the power supply phase (E),repeatedly carrying out a communication cycle in the communication phase (K), having the following steps: sending a command (F1, F2, F3) from the central unit (3) to at least one sensor unit (S1, S2, S3), receiving a response (A1, A2, A3) of a sensor unit (S1, S2, S3) in the central unit (3), receiving a respective energy status information item (ES1, ES2, ES3) from all sensor units (S1, S2, S3) in the central unit (3) and interrupting the repeated implementation of the communication cycle in the communication phase (K) by a supplementary power supply phase (Z) if one of the energy status information items (ES1, ES2, ES3) originating from the sensor units (S1, S2, S3) indicates that the corresponding sensor unit (S1, S2, S3) requires additional electrical energy for continued operation. In this way, an effective method for operating the sensor arrangement (2) in a motor vehicle (1) is provided, in which a communication between the master and the slaves with a high bandwidth is normally possible.