Automatic Parking Route Correction for Perceptible Vehicle Movement
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Solution Overview
Problem
Automatic parking systems face challenges in presenting a clear and understandable planned movement route to drivers, leading to potential unintentional brake operations and reduced control accuracy due to difficulties in perceiving the movement amount of each section, especially when the vehicle is positioned far from the target parking frame.
Innovation Solution
A vehicle control device equipped with a processor and memory, featuring an obstacle detection unit, travelable area setting unit, and route generation unit, which calculates and corrects the distance of each section to a predetermined length, ensuring a more perceivable and accurate automatic parking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the automatic parking system displays the track of planned movement at predetermined intervals, then the steering amount can be easily grasped, but the driver may still have difficulty perceiving the movement amount depending on the movement amount of each section
Solution Approach 1:
The patent changes the display parameters by showing the actual movement amount of each section rather than fixed predetermined intervals. The display adapts to the actual vehicle movement, ensuring that each displayed segment represents a perceptible distance that the driver can understand, thereby resolving the contradiction between information completeness and driver perceptibility
Solution Approach 2:
The display system dynamically adjusts the track display based on actual vehicle movement and section distances. Instead of static predetermined intervals, the system adapts the display to reflect real-time movement characteristics, making the planned movement always perceptible to the driver regardless of the specific parking scenario
2Measurement precision
If the vehicle is positioned far from the target parking frame to allow sufficient movement distance, then control accuracy is maintained, but the parking route length increases
Solution Approach 1:
The patent segments the parking route into multiple sections and applies different control strategies to each segment. By dividing the route, the system can maintain control accuracy in critical sections while optimizing overall route efficiency, allowing the vehicle to start closer to the target while still ensuring sufficient movement distance where needed
Solution Approach 2:
Different quality requirements are applied to different sections of the parking route. Critical sections near the target parking position receive enhanced control accuracy, while other sections can use more efficient paths. This local differentiation allows the vehicle to optimize the overall route length without compromising control accuracy where it matters most
3Productivity
If the vehicle moves a short distance to reach the steering wheel turn-back position, then the parking route is shortened, but the pulse interval of the wheel speed sensor becomes long and control accuracy is difficult to ensure
Solution Approach 1:
The system performs preliminary actions by pre-calculating the optimal turn-back position that ensures sufficient movement distance for accurate sensor measurement. Before executing the parking maneuver, the system determines a turn-back position that guarantees the vehicle will travel far enough to maintain adequate pulse interval for control accuracy, thereby preventing the problem of excessively long pulse intervals
Data Source
AI summary
A vehicle parking control device has a processor and a memory to control the vehicle from a starting to a target parking position. The vehicle control device includes an obstacle detection unit detecting obstacles around the vehicle, a travelable area setting unit setting an area where the vehicle can travel based on a position of the obstacles, and sets the target parking position in the travelable area, a route generation unit calculating a travel route to the target parking position in the travelable area, and a parking execution unit that causes the vehicle to travel toward the target parking position on the basis of the travel route. The route generation unit generates a route from a parking start position to the target parking position, and corrects a distance of the section to a predetermined distance when the distance of the section is less than the predetermined distance.