Automatic Parking Obstacle Detection via Torque Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional automatic parking systems using ultrasonic sensors fail to detect obstacles of predetermined height or smaller, leading to incomplete parking control, especially in narrow spaces or low visibility conditions, resulting in potential damage or safety hazards.
Innovation Solution
An automatic parking system that includes a parking space setter, an obstacle determiner, a parking space adjustor, and an automatic parking controller, which utilize information on target speed, movement speed, and engine driving torque to detect and adjust for undetected obstacles, allowing for re-identification and adjustment of parking space settings to ensure safe and complete parking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an ultrasonic sensor is used for detecting obstacles in automatic parking, then the system can detect obstacles above a certain height, but obstacles equal to or smaller than a predetermined height cannot be detected
Solution Approach 1:
The obstacle detection function is segmented into two parts: ultrasonic sensors detect obstacles above a certain height, while the obstacle determiner detects obstacles of predetermined height or smaller by analyzing vehicle movement data. This segmentation allows the system to cover the full range of obstacle heights by dividing the detection task across different methods.
Solution Approach 2:
The obstacle determiner acts as an intermediary component that bridges the detection gap left by ultrasonic sensors. It uses vehicle state information (target speed, movement speed, engine driving torque) as intermediate data to infer the presence of small obstacles that ultrasonic sensors cannot detect directly.
2Device complexity
If the automatic parking system uses only ultrasonic sensor data, then the system structure remains simple, but obstacles of predetermined height or smaller are not detected leading to incomplete parking control
Solution Approach 1:
The obstacle determiner serves multiple functions: it detects small obstacles, determines obstacle types (stopper, curb, bump), and provides information for adjusting parking space settings. This multi-functionality allows the system to maintain relatively simple structure while achieving comprehensive obstacle detection and reliable parking control.
3Productivity
If the vehicle enters a predetermined depth of target parking space without detecting small obstacles, then parking appears complete, but the vehicle may be caught by stoppers or suffer wheel damage from undetected obstacles
Solution Approach 1:
The system continuously monitors vehicle state information during parking and provides feedback to the obstacle determiner. This feedback mechanism allows real-time detection of small obstacles that would otherwise go unnoticed, enabling the system to adjust parking depth and avoid vehicle damage while maintaining efficient parking operation.
Data Source
AI summary
When a difference between a target speed and a movement speed of the vehicle exists in a process of setting a parking space based on information acquired through a sensor of the vehicle and controlling automatic parking, the system and the method may determine whether there is an obstacle equal to or smaller than a predetermined height in a process of identifying and re-identifying the obstacle by controlling engine driving torque, and a location of the existing obstacle, reset an initially set parking space or a parking termination condition according to the location of the obstacle, and perform the automatic parking control, thereby detecting the obstacle even though the obstacle is equal to or smaller than the predetermined height and is not detected by a sensor, within the parking space or on a movement path to the parking space and completing the automatic parking control.