FMCW Radar Antenna Sharing for Vehicle Pre-warning Accuracy
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Solution Overview
Problem
Conventional vehicle radar systems suffer from miss detections and false alarms due to external traffic and environmental factors, affecting their accuracy in pre-warning systems.
Innovation Solution
A vehicle radar system that utilizes a frequency-modulation continuous wave (FMCW) module and a data transceiver module sharing an antenna module to detect dynamic information and perform vehicle-to-vehicle or vehicle-to-roadside communication, enhancing pre-warning accuracy by exchanging roadway information and environment conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional FMCW radar system is used for target detection, then the system can detect dynamic information of targets, but miss detections and false alarms occur due to external traffic and environmental factors
Solution Approach 1:
The patent combines FMCW radar detection with V2V/V2I communication data fusion to create a hybrid detection system. The radar module detects dynamic target information while the communication module receives roadway and environmental data from other vehicles and roadside systems, merging both data sources to improve detection accuracy and reduce false alarms
Solution Approach 2:
The patent introduces communication modules as intermediaries that exchange detection results and environmental information between vehicles and roadside systems. This intermediary layer allows vehicles to obtain additional contextual information about traffic conditions and environment that complements direct radar detection, resolving contradictions in detection reliability
2Ease of operation
If radar systems detect outside environment and target moving conditions, then pre-warning information can be provided to drivers, but detection accuracy is affected by radar angles and efficiencies
Solution Approach 1:
The patent makes the radar system multi-functional by enabling it to both detect targets and communicate detection results to other vehicles and roadside systems. The same antenna module serves dual purposes: traditional radar detection and V2V/V2I communication, allowing the system to maintain pre-warning functionality while improving detection accuracy through data sharing
3Device complexity
If pre-warning systems rely solely on own vehicle radar detection, then system complexity is reduced, but detection coverage is limited by terrain, ground objects, or traffic conditions
Solution Approach 1:
The patent implements preliminary action by having vehicles and roadside systems continuously broadcast detection results and environmental information before actual hazards occur. Other vehicles receive this advance information through communication modules, allowing them to prepare for potential dangers that their own radar might not yet detect due to terrain or traffic conditions
Solution Approach 2:
The patent adds a communication dimension to the traditional radar detection system. Instead of relying solely on direct line-of-sight radar detection, the system uses wireless communication to transmit and receive detection data, creating an additional information channel that overcomes physical limitations of radar wave propagation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the accuracy of pre-warning systems by integrating detection results from both modules, reducing miss detections and false alarms, and enabling advanced warning of potential hazards through data fusion and communication between vehicles and roadside systems.
Implementation Method 1
a common pre-warning protection system, such as a blind spot detection system, an automatic braking system, a forward/rear collision warning system, a lane departure warning system, utilizes a frequency-modulated continuous waveform (FMCW) radar system in microwave form to perform target detections
Implementation Method 2
an antenna module, comprising a plurality of antenna strings, formed on the first plane of the substrate
Data Source
AI summary
A pre-warning method utilized in a vehicle radar system is disclosed. The vehicle radar system includes a frequency-modulation continuous wave (FMCW) module, a data transceiver module and an antenna module, and the FMCW module and the data transceiver module share the antenna module. The pre-warning method includes the FMCW module utilizing the antenna to transmit and receive beat signals to detect dynamic information of a target corresponding to the vehicle radar system and obtain a first detection result, and receiving and broadcasting data to broadcast the first detection result via the data transceiver module and the antenna module, or receive a detection result broadcasted by another vehicle radar system and combine the detection result with the first detection result to perform real-time target tracking and alarm.