Sensor Fusion for Dense Traffic Assistance
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Solution Overview
Problem
Current driver assistance systems do not provide adequate support for dense traffic situations, particularly in heavy traffic conditions with manual gearboxes, leading to driver fatigue due to frequent acceleration and braking phases and the need for constant attention to distance variations and lane changes.
Innovation Solution
A driving assistance device that combines data from a camera, time-of-flight sensor, and ultrasonic sensors to generate a fine map of the vehicle's environment, enabling the calculation of vehicle acceleration setpoints and automatic control of the vehicle's speed and position, thereby reducing driver workload in dense traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors (camera, time-of-flight, ultrasonic) are combined to generate detailed environmental maps, then measurement precision and environmental awareness are improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple sensor types (camera, time-of-flight sensor, ultrasonic sensor) into a unified driver assistance system that generates comprehensive environmental maps. The fusion unit integrates data from all sensors to create detailed spatial representations of the vehicle environment, resolving the contradiction by merging sensor capabilities rather than selecting a single complex solution
Solution Approach 2:
The environmental monitoring space is segmented into multiple zones (first environmental zone, second environmental zone, third environmental zone) each monitored by specific sensors optimized for their range. The camera covers long-range, time-of-flight covers medium-range, and ultrasonic sensors cover short-range, allowing precise monitoring without requiring all sensors to cover all distances
2Measurement precision
If the system uses a time-of-flight sensor for short-range detection, then measurement precision in close proximity is improved, but the sensor cost and complexity increase compared to simpler alternatives
Solution Approach 1:
The patent applies different sensor types to different spatial zones based on their strengths. Time-of-flight sensors are deployed specifically for the second environmental zone (short-range detection) where their precision advantages are most valuable, rather than using them throughout the entire monitoring range. This localized application optimizes cost-effectiveness while maintaining precision where needed
3Ease of operation
If the driver assistance system automatically controls acceleration and braking in heavy traffic, then driver fatigue is reduced, but the system complexity and control algorithm requirements increase
Solution Approach 1:
The driver assistance system automatically monitors environmental maps, detects traffic conditions, and controls vehicle acceleration and braking without continuous driver intervention. The system serves itself by using its own sensor data to make control decisions, reducing driver workload while managing complexity through automated self-regulation based on real-time environmental feedback
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
The system effectively assists the driver in dense traffic by automatically managing speed and position, reducing fatigue and the need for constant attention, while using cost-effective sensors to monitor the vehicle's environment over an extended area.
Implementation Method 1
a time-of-flight sensor capable of generating a second map of the vehicle's environment in a second frontal environmental zone of the vehicle between a second minimum distance less than the first minimum distance and a second maximum distance between the first minimum distance and the first maximum distance
Data Source
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AI summary
The invention relates to a driver-assistance device for a motor vehicle, comprising a camera (9) which can generate a first mapping of the environment around the motor vehicle (8), a time-of-flight sensor (12) which can generate a second mapping of the environment around the vehicle (8), and a driver-assistance module comprising: a merge unit which can generate a fine mapping of the environment to the front of the vehicle, said fine mapping being generated by the merge unit according to the first mapping and the second mapping; and a movement calculation unit which can generate an acceleration set value for the vehicle according to the fine mapping of the environment around the vehicle.