Dual Radar Sensor Direct Communication for Reduced Latency
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Solution Overview
Problem
Existing driver assistance systems face time delays and accuracy issues in data transmission between in-vehicle sensors, affecting their ability to effectively detect objects and provide timely warnings and control functions.
Innovation Solution
A driver assistance system utilizing two radar units and a human machine interface (HMI) for direct communication and data integration, allowing for real-time object detection and warning signal transmission, with each radar unit monitoring distinct rear-lateral sense regions and performing warning decisions based on object proximity and speed thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data is transmitted through in-vehicle communication between radar units and HMIs, then system coverage and functionality are improved, but time delay increases
Solution Approach 1:
The system divides communication paths into two segments: direct communication for critical data between radar units (low delay) and in-vehicle communication for non-critical data between radar units and HMIs (higher delay but provides system coverage). This segmentation allows the system to maintain both speed and comprehensiveness.
Solution Approach 2:
The second radar unit acts as an intermediary that receives data from the first radar unit through direct communication, processes it, and then transmits warning signals to HMIs through in-vehicle communication. This intermediary role optimizes the communication flow by separating time-critical data exchange from non-time-critical warning dissemination.
2Reliability
If multiple radar units operate independently with separate functions, then system reliability is improved, but device complexity increases
Solution Approach 1:
The second radar unit is designed with multi-functionality, serving both as a sensor for detecting objects in its own sense region and as a communication relay for receiving and processing data from the first radar unit. This universal design improves reliability through redundancy while avoiding the complexity of completely separate independent systems.
Solution Approach 2:
The system merges the functions of data processing and warning decision-making into the second radar unit, which handles both its own sensor data and received data from the first radar unit. This consolidation reduces overall system complexity compared to having separate processing units for each radar.
3Speed
If direct communication is used between radar units, then data transmission speed is improved, but loss of information increases due to selective data reception
Solution Approach 1:
The second radar unit performs preliminary processing and identification of objects using data from the first radar unit before transmitting warning signals. This preliminary action ensures that only relevant and verified information is acted upon, preventing information loss while maintaining fast direct communication.
Solution Approach 2:
The system implements feedback through the second radar unit's object identification process, where received data from the first radar unit is verified and cross-checked against the second radar unit's own sensor data before triggering warnings. This feedback mechanism maintains information accuracy despite the selective nature of direct communication.
Data Source
AI summary
A driver assistance system, a method for controlling the same, and a radar device are disclosed. The driver assistance system includes a first radar sensor, a second radar sensor, and at least one human machine interface (HMI). The first radar sensor monitors a first rear-lateral sense region, and acquires first radar data from the first rear-lateral sense region. The second radar sensor monitors a second rear-lateral sense region, acquires second radar data from the second rear-lateral sense region, receives the first radar data from the first radar sensor through Direct communication, and identifies an object based on the first radar data or the second radar data. The human machine interface (HMI) displays a warning control signal through in-vehicle communication when the second radar sensor performs warning decision.