Route Calculation Avoiding Recognition Difficulties
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Solution Overview
Problem
Existing route guidance systems for autonomous vehicles struggle to recognize essential features at intersections, leading to difficulties in making appropriate action decisions, even when the risk of isolation is low, due to sensor detection limitations.
Innovation Solution
A travel route calculation device equipped with sensors and a control unit that determines the necessary recognition distance for features like traffic signals and measures the detection range of onboard sensors, allowing it to calculate routes that avoid locations where feature recognition is difficult, ensuring the vehicle can recognize necessary features for safe navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle follows a route with low isolation risk, then the vehicle can reach the destination efficiently, but the vehicle may fail to recognize essential features for action decision
Solution Approach 1:
The system performs preliminary evaluation of feature recognizability at each intersection before finalizing the route. The recognition possibility evaluation unit assesses whether essential features can be detected by sensors in advance, and the route calculation unit uses this information to select routes where features are readily recognizable, ensuring reliable action decision-making before the vehicle actually reaches the intersection.
2Reliability
If the vehicle chooses a route with easily recognizable features, then the vehicle can make appropriate action decisions, but the travel time may increase due to route optimization
Solution Approach 1:
The route calculation unit modifies the traditional route optimization parameters by incorporating recognition possibility as an additional evaluation criterion. Instead of only minimizing travel time or distance, the system calculates routes that optimize both travel efficiency and feature recognizability, finding a balanced solution that satisfies both requirements simultaneously through multi-parameter route evaluation.
3Reliability
If the sensor detection range is extended to recognize distant features, then the vehicle can recognize features at more intersections, but the device complexity and cost increase
Solution Approach 1:
The system dynamically evaluates feature recognizability based on the actual sensor detection range and vehicle position. Rather than requiring fixed extended-range sensors, the recognition possibility evaluation unit adaptively assesses which features are detectable at current distances and adjusts route recommendations accordingly, allowing the system to maximize detection capability with existing sensor constraints.
Data Source
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AI summary
The travel route calculation device includes a travel route calculation unit configured to calculate a travel route for a subject vehicle to arrive at a destination, a feature detection unit configured to detect a feature, and a distance measurement unit configured to measure a distance from the subject vehicle to the feature as a necessary recognition distance. the necessary recognition distance is necessary for the subject vehicle to recognize the feature when deciding an action of the subject vehicle. The travel route calculation device further includes a determination unit configured to determine difficulty in recognizing the feature, on the basis of a detection range of the feature detection unit and the necessary recognition distance. The travel route calculation unit calculates the travel route while avoiding a location at which recognition of the feature is determined to be difficult by the determination unit.