Parking Route Calculation Using Dynamic Obstacle Distance Margins
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Solution Overview
Problem
Existing parking support devices face challenges in calculating real-time parking routes due to processing loads and sensor measurement errors, leading to unnatural vehicle positioning or potential collisions, as they rely on distance margins that may be either too large or too small.
Innovation Solution
A parking support device that calculates parking routes based on the reliability of obstacle information acquired by sensors, adjusting the distance between the vehicle and obstacles accordingly to improve driver convenience and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large distance margin is provided for each obstacle to compensate for sensor measurement errors, then the reliability of avoiding obstacle collision is improved, but the parking route becomes longer and the driver feels unnatural
Solution Approach 1:
The patent changes the parameter of distance margin from a fixed value to a variable value that adapts to the reliability of obstacle information. When sensor measurement reliability is high, the distance margin is reduced; when reliability is low, the distance margin is increased. This dynamic parameter adjustment resolves the contradiction by optimizing the balance between collision avoidance reliability and parking route efficiency.
2Length of moving object
If a small distance margin is provided for each obstacle, then the parking route becomes shorter and more natural, but the vehicle may come into contact with the obstacle when sensor measurement errors occur
Solution Approach 1:
The patent implements dynamic parameter adjustment where the distance margin is modified based on the assessed reliability of obstacle detection. High reliability allows smaller margins for efficiency, while low reliability triggers larger margins for safety, resolving the contradiction between route optimality and collision avoidance.
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring sensor reliability and adjusting the distance margin accordingly. This closed-loop control ensures that the parking route adapts to changing measurement conditions, maintaining both safety and efficiency.
3Speed
If real-time parking route calculation is performed to respond to sudden changes, then the responsiveness to dynamic obstacles is improved, but the processing load on the ECU becomes too high
Solution Approach 1:
The patent implements dynamic calculation strategy where the level of route recalculation depends on the detected level of dynamic change in the environment. For minor changes, partial updates are performed; for significant changes, full recalculation is triggered. This dynamic approach maintains responsiveness while managing computational load.
Solution Approach 2:
Instead of performing complete real-time recalculation for all scenarios, the system applies partial recalculation only when necessary based on the degree of environmental change. This selective action reduces processing load while maintaining adequate responsiveness to critical changes.
Data Source
AI summary
A parking support device is provided which, when calculating a parking route followed by a host vehicle, calculates the parking route based on the reliability of obstacle information acquired by a sensor mounted on the host vehicle, thereby improving the convenience of a driver of the host vehicle.A parking support device 10 includes an obstacle information analysis unit 303 that recognizes an external world from external world information detected by a camera 2 and a sonar 3 that acquire the external world information, and a parking route calculation unit 304 that calculates a parking route of a host vehicle 1 based on information on an obstacle in the external world recognized by the obstacle information analysis unit 303, and the parking route calculation unit 304 sets a distance between the obstacle and the host vehicle 1 in the parking route according to a degree of reliability of information on the obstacle.