Vehicle Speed Control for Green Light Intersection Passage
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Solution Overview
Problem
Existing driver assistance systems cannot contribute to improving fuel consumption and reducing traffic jams, as they only provide warnings based on whether a vehicle can cross an intersection on a green light, without considering optimal speed control.
Innovation Solution
A driver assistance system that includes a traffic information acquiring section, an intersection distance acquiring section, and a target speed calculating section, which calculates and outputs a target speed range to enable a vehicle to enter an intersection on a green light, thereby allowing the vehicle to cross without stopping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the driver assistance system only provides warnings based on whether the vehicle can cross an intersection on a green light, then the system complexity is low, but fuel consumption cannot be improved and traffic jams cannot be reduced
Solution Approach 1:
The system performs preliminary calculations of the target speed range before the vehicle reaches the intersection. By acquiring traffic signal information in advance and calculating the speed range that enables green light passage, the system prepares optimal speed guidance before the decision point is reached, allowing fuel-efficient speed control without complex real-time adjustments
Solution Approach 2:
The system provides feedback to the driver by outputting the calculated target speed range through the output unit. This feedback loop allows the driver to adjust vehicle speed to match the recommended range, enabling green light passage and improving fuel consumption. The feedback mechanism transforms the system from a simple warning device to an active guidance system
2Productivity
If the system only outputs warnings without providing target speed range, then the ease of operation is high, but productivity in reducing traffic jams is low
Solution Approach 1:
The system changes the operational parameters by providing a specific target speed range rather than a simple warning. This parameter-based guidance enables drivers to adjust their speed precisely to pass through intersections during green lights, improving traffic flow efficiency. The patent transforms qualitative warnings into quantitative speed recommendations
3Productivity
If the system calculates and outputs target speed range, then fuel consumption improves and traffic jams reduce, but the device complexity increases
Solution Approach 1:
The system segments the traffic assistance function into distinct modules: a traffic signal information acquisition unit, an intersection distance acquisition unit, a target speed range calculation unit, and an output unit. This segmentation allows each component to perform a specific function, managing device complexity through modular design while achieving improved traffic flow efficiency
Data Source
AI summary
A driver assistance device to be disposed in a vehicle includes a traffic signal information acquiring section, an intersection distance acquiring section, a target speed calculating section, and an outputting section. The traffic signal information acquiring section acquires traffic signal information that includes current and future lighting colors and lighting times of respective lighting colors of a traffic signal located in a traveling direction of the vehicle. The intersection distance acquiring section acquires an intersection distance between the vehicle and an intersection at which the traffic signal is located. The target speed calculating section calculates a target speed range to enable the vehicle to enter the intersection in a state where the lighting color of the traffic signal is green. The outputting section outputs the target speed range.