Parking Steering Assist Dynamic Tire Radius Correction
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Solution Overview
Problem
Conventional parking steering assistance systems fail to accurately calculate parking guide lines when tire sizes are changed due to tuning, leading to potential errors in parking alignment, either parking too close to or too far from obstacles.
Innovation Solution
A parking steering assist system and method that calculates an improved parking guide line by applying a correction value based on the dynamic tire radius, using an obstacle recognition unit, distance calculating unit, and storage unit to accumulate and compare distance information between the vehicle and obstacles, and adjust the tire dynamic radius value when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a normal tire size is used to calculate the parking guide line, then the system is simple and easy to operate, but the parking precision deteriorates when tire size is changed due to tuning
Solution Approach 1:
The system dynamically adjusts the tire dynamic radius value based on actual parking distance measurements rather than using a fixed normal tire size. The parking controller stores multiple tire dynamic radius values and selects the appropriate one based on the measured distance between the vehicle and obstacle, enabling the system to adapt to different tire sizes while maintaining ease of operation.
Solution Approach 2:
The system changes the parameter (tire dynamic radius value) based on actual measurements. By measuring the distance between the vehicle and obstacle after parking and comparing it with a preset reference value, the system determines the actual tire dynamic radius and uses this corrected value for subsequent parking guide line calculations, thereby maintaining parking precision across different tire configurations.
2Manufacturing precision
If the tire dynamic radius value is corrected based on actual distance measurement, then the parking precision is improved, but the device complexity increases
Solution Approach 1:
The system performs self-calibration by automatically measuring the distance between the vehicle and obstacle after parking, comparing it with the reference value, and determining the actual tire dynamic radius without requiring external intervention. This self-service approach maintains parking precision while minimizing the need for additional complex calibration equipment.
Solution Approach 2:
The system uses feedback from actual parking distance measurements to correct the tire dynamic radius value. The parking controller continuously monitors the distance between the vehicle and obstacle, compares it with the reference value, and adjusts the tire dynamic radius value accordingly, creating a closed-loop system that maintains high parking precision without requiring complex manual calibration procedures.
3Reliability
If distance information is accumulated and averaged for correction, then the reliability of parking guide line is improved, but the loss of time increases
Solution Approach 1:
The system performs preliminary calibration by accumulating distance information from multiple parking operations and calculating the average tire dynamic radius value in advance. This pre-calculated average value is stored and used for future parking guide line calculations, ensuring high reliability while avoiding the need to perform time-consuming measurements and calculations during each parking operation.
Data Source
AI summary
A parking steering assistance system is provided that calculates and provides a parking guide line applied with a tire dynamic radius value. The system includes an obstacle recognition unit configured to recognize an obstacle adjacent to a vehicle after parking is completed. A distance calculating unit is configured to calculate distance information between the obstacle and the vehicle, and a parking controller is configured to control a tire dynamic radius correction which is applied when calculating a parking guide line by using the distance information between the obstacle and the vehicle.