Vehicle Speed Control Using Driver Visual Line
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Solution Overview
Problem
Existing vehicle inter-vehicle distance control systems fail to promptly and accurately select a target vehicle based on both the position of preceding vehicles and the driver's visual line, leading to delayed deceleration and unintended acceleration or deceleration.
Innovation Solution
A vehicle equipped with a preceding-vehicle detection unit and a driver visual line detection unit, which work together with a control unit to choose a target vehicle by matching the angle between the vehicle and the driver's visual line, allowing for precise control of inter-vehicle distance through speed adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the inter-vehicle distance control system only detects other vehicles and controls speed when vehicles are detected over a preset time, then the system complexity is reduced, but the response time to select a target vehicle is delayed causing sharp deceleration
Solution Approach 1:
The control unit preliminarily selects a target vehicle by comparing the angle between the driver's visual line and preceding vehicles before the driver actually looks at them. This preliminary action allows the system to prepare control strategies in advance, reducing the response time when the driver actually notices a vehicle, thereby preventing sharp deceleration while not significantly increasing system complexity.
2Reliability
If the control system adjusts speed based on any detected vehicle position, then the inter-vehicle distance control coverage is improved, but unintended deceleration occurs when vehicles are not relevant to the driver's attention
Solution Approach 1:
The control unit applies different control strategies based on the local condition of whether a vehicle matches the driver's visual line angle. When a match is found, the system activates target vehicle selection and speed adjustment; when no match is found, the system maintains current speed. This localized application of control actions eliminates unintended deceleration while maintaining accurate inter-vehicle distance control when needed.
Solution Approach 2:
The system continuously monitors the driver's visual line angle and compares it with the positions of detected preceding vehicles. This feedback mechanism allows the system to dynamically adjust whether to select a target vehicle and apply speed control, ensuring that control actions are only taken when relevant to the driver's actual attention, thereby preventing harmful unintended deceleration.
3Device complexity
If the system uses only preceding vehicle position detection, then the detection device complexity is reduced, but the target vehicle selection precision is insufficient leading to delayed or incorrect target selection
Solution Approach 1:
The control unit merges two detection inputs - the position of preceding vehicles and the driver's visual line angle - to select the target vehicle. By combining these two pieces of information through angle comparison, the system achieves precise target vehicle selection without requiring complex additional detection devices, as both inputs come from existing sensors in the vehicle.
Data Source
AI summary
A vehicle chooses a target vehicle based on a position of a preceding vehicle and information about a visual line of a driver, both of which are acquired by respective detection units provided in the vehicle, and controls a traveling speed of the vehicle of the driver in relation with the target vehicle. The vehicle includes: a preceding-vehicle detection unit to detect other vehicle located in front of the vehicle of a driver to acquire a position of the other vehicle; a driver visual line detection unit to acquire information about a visual line of the driver; and a control unit to choose a target vehicle based on the information of the other vehicle and the information about the visual line of the driver and control a traveling speed of the vehicle which the driver drives such that an inter-vehicle distance from the target vehicle becomes a preset distance.