Parking Assistance Switching to Enlarged Coil View
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Solution Overview
Problem
Existing parking assistance systems do not clearly indicate the displaced direction or angle between the ground coil and the power supply unit, confusing users about the necessary vehicle movement during coil alignment for wireless power transfer.
Innovation Solution
A parking assistance method that switches from a bird's-eye image to an enlarged image showing the relative position between the ground coil and the vehicle coil when the absolute value of the relative angle between the ground marks and the vehicle's center line is within a predetermined value, allowing users to easily recognize the alignment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a bird's-eye image is displayed to show the overall parking position, then the user can recognize the vehicle's position in the parking space, but the user cannot clearly recognize the relative position and alignment between the ground coil and vehicle coil
Solution Approach 1:
The display information is segmented into two distinct modes: a bird's-eye view for overall position recognition and an enlarged view for detailed coil alignment. The system divides the information presentation into separate visual representations, allowing the user to focus on specific aspects (overall position or coil alignment) by switching between display modes based on the current parking stage.
Solution Approach 2:
The system transitions from a top-down bird's-eye view (2D overhead perspective) to an enlarged frontal view (different dimensional perspective) when coil alignment is required. This dimensional change in display perspective allows the user to see the relative position and angle between coils more clearly, providing alignment information that is not visible in the standard bird's-eye view.
2Measurement precision
If only distance information is provided between the power receiving unit and power supply unit, then the user can understand the gap size, but the user is confused about the direction and angle for vehicle movement during coil alignment
Solution Approach 1:
The display unit acts as an intermediary that translates raw sensor data (distance, angle, relative position) into intuitive visual representations. Instead of showing only numerical distance values, the system generates graphical displays showing the relative positions of coils, alignment angles, and directional indicators, making the alignment operation easier by providing comprehensive spatial information in visual form.
Solution Approach 2:
The system uses color coding to indicate alignment status and directional information. Different colors represent different alignment states (e.g., green for proper alignment, red for misalignment) and directional cues for vehicle movement, allowing the user to quickly understand the required adjustments without interpreting complex numerical data.
3Loss of information
If the display shows detailed coil alignment information continuously, then the user can always see the relative position, but the overall parking context is lost and the display becomes cluttered
Solution Approach 1:
The display mode is made dynamic and adaptive, automatically switching between bird's-eye view and enlarged coil alignment view based on the vehicle's parking stage and alignment status. The system adjusts the level of detail shown in real-time, presenting comprehensive information only when needed for coil alignment while maintaining a simplified overall view during the approach phase, thus avoiding constant display clutter.
Solution Approach 2:
The system prepares and displays detailed coil alignment information only in advance of when it is actually needed (when the vehicle is properly positioned in the parking space and ready for coil alignment). During the approach phase, only essential position information is shown, and detailed alignment data is made available immediately when the vehicle reaches the appropriate position, avoiding unnecessary information overload throughout the entire parking process.
Data Source
AI summary
A parking assistance method provides parking assistance when parking a vehicle in a parking space equipped with a ground coil for supplying electric power via a wireless connection to a vehicle coil mounted on the vehicle, at least two ground marks indicating a position of the ground coil, and a parking frame. The parking assistance method switches from a bird's-eye image including the vehicle and a circumference of the vehicle as viewed from above the vehicle to an enlarged image showing a relative position between the ground coil and the vehicle coil on a larger scale than the bird's-eye image when an absolute value of a relative angle between a longitudinal direction of the parking frame and a front-rear direction of the vehicle is a predetermined value or smaller.