Parking Space Detection Using Front and Side Sensor Fusion
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Solution Overview
Problem
The existing method of detecting a parkable space using only a sonar installed on the side of a vehicle is limited, as it requires the sonar to pass the parkable space and cannot provide parking assistance in all environments, leading to inaccurate detection and delayed presentation of available spaces to the driver.
Innovation Solution
A parking assistance device that utilizes both a front detector and a side detector to set and correct the parkable space, allowing for early presentation and improved detection accuracy by dynamically updating the space position based on data from both sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only a side detector is used to detect parkable space, then the detection is reliable when the vehicle passes by, but the parking assistance cannot be provided in all environments and the detection is delayed
Solution Approach 1:
The patent combines front detector and side detector to work together. The front detector detects parkable spaces ahead of the vehicle, while the side detector detects spaces beside the vehicle. By merging their detection results, the system achieves both early detection capability and reliable verification, resolving the contradiction between reliability and environmental adaptability.
Solution Approach 2:
The front detector performs preliminary detection of parkable spaces before the vehicle reaches them. This allows the system to identify potential parking locations in advance, present them to the driver early, and then use the side detector to verify and correct the detection results when the vehicle passes by, thereby improving both timing and reliability.
2Measurement precision
If only a side detector is used to detect parkable space, then the detection is accurate when passing by, but the presentation to driver is delayed
Solution Approach 1:
The front detector performs preliminary detection of parkable spaces ahead of the vehicle, allowing early identification and presentation to the driver. The side detector then performs preliminary correction when the vehicle passes by, ensuring accuracy without delaying the initial presentation of parking options.
Solution Approach 2:
The side detector provides feedback to correct and refine the parkable space information initially detected by the front detector. This feedback mechanism allows the system to maintain early presentation capability while improving detection accuracy through sequential verification.
3Loss of time
If front detector is used to detect parkable space early, then parking assistance starts early, but the detection accuracy may be insufficient
Solution Approach 1:
The front detector performs preliminary detection of parkable spaces ahead of the vehicle, allowing early identification and presentation to the driver. The side detector then performs preliminary correction when the vehicle passes by, ensuring accuracy without delaying the initial presentation of parking options.
Solution Approach 2:
The side detector provides feedback to correct and refine the parkable space information initially detected by the front detector. This feedback mechanism allows the system to maintain early presentation capability while improving detection accuracy through sequential verification.
Data Source
AI summary
In a method of detecting a parkable space using only a sonar installed on a side of a vehicle, automatic parking assistance cannot be implemented at an early stage, and an environment in which automatic parking assistance is possible is limited. In a parking assistance device including a parkable space setting unit that sets a parkable space existing ahead of the vehicle based on information from a front detector, the parkable space setting unit corrects the parkable space based on information on the parkable space acquired by a side detector when the vehicle passes by the parkable space.