Parking Exit Direction Detection Using Road Surface Markings
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Solution Overview
Problem
Existing passage direction detecting devices are ineffective due to variability in sizes, shapes, and parking methods of vehicles in adjacent parking areas, leading to inappropriate exit path calculations when relying on other vehicles as obstacles.
Innovation Solution
A passage direction detecting device that utilizes road surface markings, such as white lines, to determine the appropriate exit path by detecting the extending direction of a straight line passing through the end portions of the markings, ensuring consistency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passage direction is detected with reference to other vehicles in adjacent parking areas, then exit path can be calculated, but the detection accuracy deteriorates due to variability in vehicle sizes, shapes, and parking methods
Solution Approach 1:
The patent introduces road surface markings as an intermediary reference object between the vehicle and the passage direction. Instead of directly using other vehicles as reference, the system detects the passage direction by recognizing the predetermined markings (lines, arrows, symbols) on the road surface, which serve as a stable mediator that eliminates the variability introduced by different vehicle configurations
Solution Approach 2:
The system creates a virtual model of the passage direction by detecting and processing images of road surface markings. The detection processing unit generates information about the passage direction based on the recognized marking patterns, effectively copying the directional information from the physical markings into a usable digital format for path calculation
2Measurement precision
If road surface markings are used to detect passage direction, then detection accuracy improves, but the device complexity increases due to image recognition requirements
Solution Approach 1:
The detection processing unit is designed to perform multiple functions: it captures images of the road surface, recognizes predetermined markings, determines passage direction, and provides this information to the exit path calculation system. By making the detection unit multi-functional, the patent avoids adding separate dedicated components for each function, thereby managing complexity while achieving high precision
Solution Approach 2:
The road surface markings themselves serve as self-identifying reference elements. The predetermined patterns (lines, arrows, symbols) are designed to be automatically recognizable by the detection system without requiring complex preprocessing or manual calibration, allowing the system to self-calibrate using the inherent structure of the markings
Data Source
AI summary
A passage direction detecting device includes: a detection processing unit that detects a passage direction in which a passage connected to an exit of a parking area of a vehicle extends and the vehicle has to travel after exiting from the parking area, based on a road surface marking provided on a road surface to illustrate the parking area.