Vehicle Collision Warning Using Road Sign and V2V Position Checks
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Solution Overview
Problem
Existing safe driving assist apparatuses for vehicles rely on GNSS positioning information, which can lead to inaccurate determination of collision possibilities, resulting in unnecessary warnings due to low measurement accuracy, especially in scenarios involving different levels or directions of vehicle travel.
Innovation Solution
A safe driving assist apparatus equipped with a camera for image acquisition, wireless communication for vehicle-to-vehicle information exchange, and a control unit that determines the presence of attention-required vehicles by comparing specific object information from images and communication data, such as road signs, to enhance positional accuracy and reduce false warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS positioning information is used to determine collision possibility, then the system is simple and costs are low, but measurement precision is insufficient leading to erroneous determination
Solution Approach 1:
The patent combines multiple information sources (GNSS positioning data, V2V communication data, and camera image recognition data) to determine collision possibility. By merging these different data types, the system achieves higher measurement precision than GNSS alone while avoiding the need for complex high-precision mapping systems.
Solution Approach 2:
The patent introduces camera-based road sign recognition as an intermediary element to verify and supplement GNSS positioning data. The road sign information acts as a mediator to confirm the vehicle's actual location and context, resolving discrepancies that would otherwise lead to erroneous collision warnings.
2Reliability
If GNSS positioning information with low measurement accuracy is used, then device complexity is low, but unnecessary warnings are generated due to erroneous collision determination
Solution Approach 1:
The system uses camera-based road sign recognition to provide feedback on the vehicle's actual location and context. This feedback loop allows the system to verify GNSS positioning data and correct erroneous determinations, significantly improving reliability by reducing false collision warnings.
Solution Approach 2:
The camera continuously captures images of road signs ahead of the vehicle, performing preliminary verification of the vehicle's location and context before collision determination is made. This preliminary action prevents erroneous warnings by ensuring the vehicle is in the expected location and context.
3Measurement precision
If high-accuracy map system is used to improve positioning accuracy, then measurement precision improves, but costs increase
Solution Approach 1:
The patent replaces expensive high-accuracy map systems with cheaper alternatives: standard GNSS receivers, off-the-shelf cameras, and free or low-cost road sign databases. This substitution achieves sufficient positioning accuracy for collision warning without the high costs of proprietary mapping systems.
Solution Approach 2:
The system uses camera images to create a visual copy of the road environment and road signs, which is then processed to extract location information. This copying approach replaces the need for expensive digital map data while achieving similar positioning accuracy through image recognition.
Data Source
AI summary
A safe driving assist apparatus includes an image processing ECU configured to determine whether or not a specific object exists forward of an own vehicle, a wireless communication apparatus configured to acquire information on a road sign recognized by another vehicle from the another vehicle through vehicle-to-vehicle communication, and a driving assist ECU configured to determine, based on information on a road sign detected by the own vehicle and the information on the road sign detected by the another vehicle, whether or not a specific condition indicating that a possibility of collision between the own vehicle and the another vehicle exists is satisfied, and to execute, when determining that the specific condition is satisfied, notification control of notifying a driver of the own vehicle that the possibility of collision between the own vehicle and the another vehicle exists.