Vehicle Park Assist System Obstacle Avoidance Trajectory
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Solution Overview
Problem
Existing vehicle park assist systems require driver intervention to avoid obstacles on the side opposite the target parking space, which can lead to increased risk of collision during parking maneuvers.
Innovation Solution
A park assist system utilizing dual sensing systems, including ultrasonic sensors and odometric sensors, to determine obstacle presence in clearance zones and calculate alternative steering trajectories to safely maneuver the vehicle into a target parking space while avoiding obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the park assist system uses basic sensing to identify parking spaces, then parking space identification is achieved, but obstacle detection capability is insufficient leading to collision risk
Solution Approach 1:
The sensing system is segmented into multiple independent sensor units distributed at different locations on the vehicle (front, rear, side sensors). Each sensor monitors a specific zone, and the park assist system integrates data from all segments to achieve comprehensive obstacle detection while maintaining system reliability even if individual sensors fail.
Solution Approach 2:
The system transitions from two-dimensional front-rear obstacle detection to three-dimensional spatial awareness by adding side clearance zone monitoring. Side sensors detect obstacles in the lateral dimension, enabling the system to identify obstacles that would be invisible to conventional front-and-rear sensors alone, thus preventing collisions during parking maneuvers.
2Object-affected harmful factors
If the system monitors only front and rear obstacles, then sensor configuration is simple, but side obstacles cannot be detected creating collision hazard
Solution Approach 1:
The sensing system is segmented into multiple independent sensor units distributed at different locations on the vehicle (front, rear, side sensors). Each sensor monitors a specific zone, and the park assist system integrates data from all segments to achieve comprehensive obstacle detection while maintaining system reliability even if individual sensors fail.
Solution Approach 2:
The park assist system is designed with multi-functionality to handle various obstacle scenarios. The same sensor network and control system that detect front and rear obstacles also detect side obstacles in clearance zones. The system can adaptively switch between different parking modes (parallel, perpendicular, angled) and obstacle avoidance strategies, making the sensor system universally applicable to multiple detection needs.
3Productivity
If the system recommends all detected parking spaces, then parking efficiency is high, but safety is compromised by recommending spaces with obstacles
Solution Approach 1:
The park assist system implements continuous feedback loops where sensor data from all zones (front, rear, side) is constantly monitored and fed back to the control unit. Before recommending a parking space, the system performs real-time feedback validation to ensure no obstacles are detected in the target space or adjacent clearance zones. This feedback mechanism allows the system to maintain high parking efficiency while ensuring safety by filtering out spaces with obstacles.
Solution Approach 2:
The system performs preliminary scanning and validation of potential parking spaces before they are recommended to the driver. The park assist system proactively identifies and eliminates unsafe parking spaces by checking for obstacles in advance, so only safe spaces are presented as recommendations. This preliminary action prevents the need for corrective maneuvers after parking has begun, maintaining both efficiency and safety.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively identifies and navigates around obstacles, minimizing the risk of collision by recommending or avoiding parking spaces with obstacles in the clearance zones, thereby ensuring safer autonomous parking.
Implementation Method 1
A second sensing system determines whether an obstacle is located in a predetermined clearance zone on a side of the vehicle opposite the target parking space
Data Source
AI summary
A park assist system for parking a vehicle in a target parking space includes a first sensing system which determines whether there is a sufficient slot length in a target parking space in which to park the vehicle. A second sensing system determines whether an obstacle is located in a predetermined clearance zone on a side of the vehicle opposite the target parking space. A decision regarding whether to recommend parking the vehicle in the target parking space sensed by the first sensing system is dependent upon a determination that an obstacle located in the clearance zone may be avoided by executing a first steering trajectory provided by the park assist system in order to avoid the obstacle before executing a second steering trajectory provided by the park assist system in order to park the vehicle into the target parking space.