Autonomous Route Selection for Sensor-Limited Travel Speed
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Solution Overview
Problem
Limiting target travel speed of a vehicle can lead to traffic obstruction and efficiency deterioration in autonomous driving scenarios.
Innovation Solution
A travel assistance device that detects the surrounding environment and assists vehicles in selecting an alternative route with speed limits compatible with the vehicle's allowable travel speed, reducing the need for lower speeds that could obstruct traffic flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If target travel speed is limited based on sensor recognition precision, then safety and control reliability are improved, but traffic efficiency deteriorates due to speed being lower than road speed limits
Solution Approach 1:
The system dynamically adjusts the autonomous driving control mode based on real-time sensor recognition precision. When recognition precision is high, the vehicle operates at higher speeds with fewer restrictions. When recognition precision decreases, the system automatically transitions to more restrictive control modes with lower speed limits, creating a dynamic balance between safety and efficiency rather than using fixed speed limitations
Solution Approach 2:
The system changes the speed parameter adaptively based on sensor performance conditions. Instead of maintaining a constant low speed limit, the maximum allowable speed is adjusted according to the current recognition state of sensors and vehicle conditions, allowing the vehicle to operate at optimal speeds for each specific situation while maintaining safety
2Reliability
If target travel speed is reduced to ensure safe autonomous operation, then safety is improved, but travel time increases and traffic flow is obstructed
Solution Approach 1:
The system implements dynamic speed adjustment based on real-time sensor recognition precision and environmental conditions. When sensors achieve high recognition precision, the vehicle accelerates to higher speeds reducing travel time. When recognition precision deteriorates, the system automatically reduces speed to maintain safety, creating an adaptive balance between travel time and safety rather than maintaining consistently low speeds
Solution Approach 2:
The system maintains continuous monitoring of sensor recognition precision and continuously adjusts speed parameters to optimize both safety and travel time. This continuous adaptation ensures that the vehicle operates at the maximum safe speed at all times, minimizing travel time while maintaining safety through real-time adjustments rather than static speed limitations
Data Source
AI summary
A travel assistance device configured to detect a surrounding environment of a first vehicle by an onboard sensor of the first vehicle and assist the autonomously traveling first vehicle in traveling includes at least one computer configured to perform processing including: setting allowable travel speed, that is a speed at which the first vehicle can be caused to travel under autonomous driving control, to a speed lower than a legal speed or a set speed, that is a speed set by a user, according to a recognition state of the onboard sensor or a vehicle state of the first vehicle; and generating an alternative route including a road having a speed limit less than or equal to the allowable travel speed as a target travel route of the first vehicle, based on the current position of the first vehicle, the destination of the first vehicle, and the allowable travel speed.