Driving Assistance Apparatus Dynamic Detection Range Prediction
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Solution Overview
Problem
Conventional driving assistance systems face challenges in maintaining detection of assistance targets, such as pedestrians or vehicles, within the set detection range, especially in dynamic environments like intersections, where unexpected movements can lead to targets being out of range, resulting in unnecessary detection of non-targets when extending the sensor range.
Innovation Solution
A driving assistance apparatus that includes a moving-body-information acquiring unit, an assistance-target determining unit, a movement-point predicting unit, and a detection-range changing unit, which uses speed vectors to predict future movement points and adjust the detection range to include these points, ensuring the assistance target remains within the detection area without unnecessary detection of other moving bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection range of the peripheral detection sensor is extended to reliably monitor the assistance target, then the assistance target can be continuously detected, but moving bodies other than the assistance target are unnecessarily detected
Solution Approach 1:
The detection range is made dynamic by predicting the future position of the assistance target based on its current position and speed vector, then adjusting the detection range to follow the predicted trajectory. This allows the system to maintain reliable detection of the assistance target while avoiding unnecessary detection of other moving bodies outside the predicted path.
Solution Approach 2:
The detection resources are concentrated locally around the predicted position of the assistance target rather than uniformly across an extended detection range. By focusing the detection effort on the specific region where the assistance target is expected to be, the system maintains detection reliability while reducing false detections of unrelated objects.
2Adaptability or versatility
If the detection range is changed corresponding to the distance between the moving body and own vehicle, then the detection range adapts to the target distance, but the assistance target becomes out of detection range when moving in unexpected directions
Solution Approach 1:
The system performs preliminary action by predicting the future position of the assistance target before the target actually moves there. By using the speed vector to calculate the predicted position in advance, the detection range can be proactively adjusted to include the future position, ensuring continuous detection even when the target moves in unexpected directions.
Solution Approach 2:
The detection range is transformed from a static, distance-based parameter to a dynamic parameter that adapts to the predicted motion trajectory of the assistance target. This dynamic adjustment ensures the detection range remains adaptable to both distance changes and directional changes of the target.
Data Source
AI summary
A driving assistance apparatus includes: a moving-body-information acquiring unit configured to acquire moving-body information including a position and a speed vector of a moving body existing laterally ahead of own vehicle; an assistance-target determining unit configured to determine an assistance target approaching from a lateral direction with respect to a travelling direction of the own vehicle; a movement-point predicting unit configured to use the speed vector of the moving body to predict a future movement point; a detection-range changing unit configured to change the detection range by adding a change region to include the movement point along a moving direction indicated by the speed vector at a time the movement point is out of the detection range; and an assistance performing unit configured to perform driving assistance on an assistance target including the moving body determined as the assistance target within a changed detection range.