Parking Assistance Route Planning with False Obstacle Correction
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Solution Overview
Problem
Conventional parking assistance devices can incorrectly detect obstacles, leading to false judgments about parking availability, which prevents vehicles from being parked at suitable locations.
Innovation Solution
The parking assistance device employs a combination of two-dimensional and three-dimensional sensors to recognize the road surface environment, allowing occupants to correct false obstacle detections and calculate a parking route based on corrected information, ensuring accurate parking route calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external detection sensors are used to detect obstacles around the vehicle, then the vehicle can avoid obstacles during parking, but false detection of non-obstacle objects as obstacles occurs, leading to incorrect judgment of parking availability
Solution Approach 1:
The patent transitions from two-dimensional detection (camera images only) to three-dimensional detection by introducing ultrasonic sensors that provide depth information. This dimensional enhancement allows the system to distinguish between actual obstacles and false detections by verifying the spatial characteristics of detected objects, thereby improving measurement precision while maintaining reliability
Solution Approach 2:
The patent introduces an intermediary verification mechanism where ultrasonic sensor data acts as a mediator to validate camera-based obstacle detections. The ultrasonic sensors provide an intermediate layer of verification that confirms whether detected objects are true obstacles, resolving the contradiction between detection sensitivity and precision
2Reliability
If the system prohibits correction of road surface information for three-dimensionally detected obstacles, then false corrections can be prevented, but the system becomes less flexible in handling detection errors
Solution Approach 1:
The patent applies different correction policies to different types of obstacles based on their detection characteristics. Two-dimensionally detected obstacles (from camera only) are open to correction, while three-dimensionally detected obstacles (from ultrasonic sensor) are protected from correction. This local differentiation of quality controls resolves the contradiction by providing appropriate flexibility where needed while maintaining reliability where critical
Data Source
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AI summary
Parking a vehicle at a location where parking is possible even when an obstacle is falsely detected. In a parking assistance device 1, an external environment recognition unit 11 recognizes road surface environment around an own vehicle on the basis of information detected by an external environment sensor 4 installed in the own vehicle. The display control unit 17 performs screen display using the HMI device 2 to present, to an occupant of the own vehicle, road surface information indicating the presence of an obstacle on the road surface around the own vehicle on the basis of the road surface environment recognized by the external environment recognition unit 11. The road surface information correction unit 16 corrects the road surface information and invalidates the obstacle. The parking route calculation unit 14 calculates a parking route for parking the own vehicle on the basis of the road surface information corrected by the road surface information correction unit 16.