Parking Space Search Device Route Shifting for Detection Accuracy
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Solution Overview
Problem
Conventional parking space search devices struggle to accurately determine available parking spaces from a distance due to sparse reflection point density, making it difficult to identify suitable parking spaces during automatic vehicle parking.
Innovation Solution
A parking space search device equipped with a stereo camera or other object detectors that shifts the vehicle's travel route to allow the camera to view potential parking spaces from a more favorable angle, generating 3D point clouds and 2D maps to estimate parking lots and search for suitable spaces, enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a radar device transmits radio waves to scan for parking spaces, then parking space detection is performed, but reflection point density becomes sparse at long distances, reducing detection accuracy
Solution Approach 1:
The patent transitions from 2D radar scanning to 3D point cloud mapping by introducing vertical dimension data from multiple cameras. This dimensional expansion allows the system to reconstruct parking spaces in three-dimensional space, compensating for the sparsity of reflection points in traditional 2D radar detection and improving detection accuracy at long distances.
Solution Approach 2:
The patent merges data from multiple imaging devices (cameras) mounted at different positions on the vehicle to create a comprehensive 3D point cloud representation. By combining information from multiple sources, the system overcomes the limitation of sparse reflection points and achieves denser, more accurate parking space detection.
2Measurement precision
If the vehicle maintains its current travel route, then the object detector can continuously scan, but the camera cannot clearly view entrance points of parking spaces from favorable angles
Solution Approach 1:
The patent implements dynamic travel route adjustment by continuously modifying the vehicle's trajectory based on real-time parking space detection results. The system dynamically shifts the travel route to optimize camera viewing angles for detecting entrance points, transforming the static scanning approach into an adaptive, movement-based detection strategy.
Solution Approach 2:
The patent performs preliminary travel route shifts before the vehicle reaches the optimal detection position for parking space entrance points. By anticipating the need for favorable viewing angles and adjusting the trajectory in advance, the system ensures that the camera will have clear visibility when needed, rather than reacting after the opportunity is lost.
Data Source
AI summary
A parking space search device includes an input receiver, and a controller. The input receiver receives, from an object detector mounted on a vehicle, information related to an object present at a travel direction-side with respect to the vehicle. The controller estimates a parking lot based on the information that the input receiver receives. The controller performs control of, when the estimated parking lot is on one of a left direction and a right direction with respect to the travel direction of the vehicle, shifting a travel route of the vehicle to another one of the left direction and the right direction. The controller searches for a parking space for the vehicle based on the information that the input receiver receives after the travel route of the vehicle is shifted.