Behavior Prediction Device Using Road Shape Reference Lines
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Solution Overview
Problem
Existing behavior prediction devices for automated driving vehicles struggle to accurately predict the trajectory of another vehicle when road shapes change, leading to a deterioration in prediction accuracy.
Innovation Solution
A behavior prediction device that sets a reference position along the road shape, detects the position of the other vehicle, calculates distances from the reference position, and uses these distances in time series to predict the vehicle's trajectory, employing regression analysis to improve prediction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If trajectory prediction is based only on positional information, then the prediction method is simple, but prediction accuracy deteriorates when road shape changes
Solution Approach 1:
The patent introduces a new dimension of measurement by calculating distances from reference positions along the road shape, rather than using only absolute positional coordinates. This transforms the prediction approach from 2D coordinate-based to distance-based along the road trajectory, improving accuracy while maintaining reasonable complexity
Solution Approach 2:
The patent introduces reference positions as intermediary elements that are set along the road shape. These reference positions serve as mediators between the road geometry and the vehicle position, enabling accurate trajectory prediction by measuring distances from these intermediate points rather than directly comparing absolute positions
2Measurement precision
If reference positions are set along road shape, then trajectory prediction accuracy improves, but calculation complexity increases
Solution Approach 1:
The patent segments the road into multiple reference positions along its shape, creating discrete measurement points. This segmentation allows the complex road geometry to be broken down into manageable segments, where distance calculations from each reference position can be performed independently and then integrated for overall trajectory prediction
Data Source
AI summary
A behavior prediction device predicts behavior of another vehicle traveling around a host vehicle, and the behavior prediction device includes: a reference position setting unit that sets a reference position (reference line) along a shape of a road; a position detection unit that detects a position of the other vehicle; a distance calculation unit that calculates a distance from the reference position (reference line) to the other vehicle on the basis of information about the reference position (reference line) and information about the position of the other vehicle; and a prediction unit that predicts a trajectory of the other vehicle on the basis of information about the distance in time series calculated by the distance calculation unit.