Back Door Opening Control for Parking Assist Systems
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Solution Overview
Problem
Existing parking assist systems fail to appropriately limit the opening degree of a vehicle's back door at specific park positions, as they do not consider environmental factors like ceiling height, leading to potential door collisions or inadequate opening.
Innovation Solution
A parking assist system that includes an actuator to control the back door, an opening degree control unit, a storage device to store allowable opening degrees for specific park positions, and a position information acquisition unit, which limits the back door opening based on stored data and displays guide marks on a rear camera video image to indicate the required space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle is reversed to the limit and parked in accordance with the guide mark, then the parking space utilization is improved, but the back door cannot be opened to a desired opening degree due to environmental constraints
Solution Approach 1:
The system performs preliminary detection of the parking environment (ceiling height, wall distance) before the vehicle completes parking. Based on this detection, the allowable opening degree is predetermined and stored in association with the detected park position, so that when the vehicle parks to the limit, the back door opening is automatically restricted to prevent collision with the ceiling or wall.
2Ease of operation
If the back door opening degree is not limited at specific park positions, then the user convenience is improved, but the back door may hit the ceiling or surrounding obstacles
Solution Approach 1:
The system detects the parking environment (ceiling height, wall distance) and provides feedback by storing the allowable opening degree in association with the detected park position. When the vehicle is parked at that position, the opening degree control unit automatically applies the stored restriction, preventing collision while maintaining user convenience through automatic control.
3Device complexity
If the parking assist system considers only wall distance but not ceiling height, then the system complexity is reduced, but the back door may hit the ceiling when opened
Solution Approach 1:
The detection unit is designed to detect multiple environmental parameters (both wall distance and ceiling height) using a unified detection mechanism. The system stores and manages multiple types of restriction information (distance to wall, height to ceiling) in a single storage structure, allowing comprehensive protection against different types of obstacles without significantly increasing system complexity.
Data Source
AI summary
A parking assist system includes: an actuator that drives a back door of a vehicle; an opening degree control unit that controls an opening degree of the back door by controlling the actuator; a storage device that stores an allowable opening degree of the back door at a park position of the vehicle in association with the park position; and a position information acquisition unit that acquires position information of the vehicle. When a position of the vehicle corresponds to the park position stored in the storage device, the opening degree control unit limits the opening degree of the back door on the basis of the allowable opening degree of the back door, stored in the storage device in association with the park position.