Obstacle Height Detection for Parking Assistance
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Solution Overview
Problem
Current parking assistance systems are inefficient due to inaccuracies in sensor recognition, leading to prolonged parking times as they often mistake curbs for parking spaces and fail to accurately assess obstacle heights, resulting in vehicles not being able to cross over obstacles safely.
Innovation Solution
A system that includes a distance measurement module with a distance sensor, wireless transmitter, and controller to measure and determine the height of obstacles relative to the vehicle, allowing for secure crossing over obstacles and preventing door damage by providing aural and visual warnings when obstacles are higher than the vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a parking assistance system uses radar sensors to detect obstacles, then it can identify parking-possible spaces, but it mistakenly recognizes curbs as parking spaces and fails to accurately assess obstacle heights, leading to prolonged parking time
Solution Approach 1:
The patent adds height dimension detection to the existing 2D radar-based obstacle detection system. By incorporating a distance sensor (ultrasonic, infrared, or laser) that measures vertical distance from the vehicle to the obstacle, the system transitions from planar detection to three-dimensional spatial assessment, enabling accurate curb height measurement and differentiation between parking spaces and curbs.
Solution Approach 2:
The patent introduces a distance sensor as an intermediary measurement device between the vehicle and the obstacle. This intermediary sensor specifically measures the height of curbs and obstacles, providing supplementary data that the main radar system cannot capture, thereby enabling the controller to distinguish between parking spaces and curbs more accurately.
2Reliability
If the parking assistance system moves the vehicle through passive traffic lines for safety, then it ensures safe parking, but it takes longer to complete the parking maneuver compared to active driving
Solution Approach 1:
The system performs preliminary detection of obstacle heights before the vehicle approaches them during parking. By measuring curb heights in advance and comparing them with the vehicle's ground clearance, the controller can determine in advance whether the vehicle can safely cross over the obstacle, allowing for more direct and efficient parking paths rather than conservative repeated maneuvers.
Solution Approach 2:
The patent enables dynamic adjustment of the parking strategy based on real-time obstacle height measurements. When curbs are detected to be below a predetermined height threshold, the system dynamically changes the parking approach to allow wheel crossing over the curb, optimizing the parking path based on actual conditions rather than following fixed conservative trajectories.
3Measurement precision
If the system recognizes curbs as parking-possible spaces, then it can guide parking maneuvers, but it causes the vehicle to stop short of curbs instead of reaching them, reducing parking space utilization
Solution Approach 1:
The patent changes the detection parameter from simple presence detection to height measurement. By measuring the vertical distance to the obstacle and comparing it with the vehicle's ground clearance and bumper height, the system can differentiate between low curbs (safe to cross) and high curbs (should avoid), enabling accurate recognition and optimal positioning relative to curbs.
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
This system enables more stable and efficient parking by accurately determining obstacle heights, allowing vehicles to cross over obstacles and preventing door damage, thereby reducing parking time and improving parking assistance accuracy.
Implementation Method 1
a distance sensor measuring a distance from an obstacle existing at a side of a vehicle
Implementation Method 2
a distance sensor measuring a distance from an obstacle existing at a side of a vehicle
Data Source
AI summary
A system for detecting a height of an obstacle for parking assistance, may include a distance measurement module including a distance sensor measuring a distance from an obstacle existing at a side of a vehicle and a wireless transmitter wirelessly transmitting a detecting value of the distance sensor; a wireless receiver receiving the detecting value of the distance sensor from the wireless transmitter; and a controller determining a height of the obstacle on the basis of the received detecting value.