Vehicle Access Control Using Key Position Uncertainty Thresholds
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Solution Overview
Problem
Modern motor vehicles with automatically opening door systems face issues of erroneous predictions leading to uncomfortable situations where the wrong door is opened while the intended door remains closed, due to uncertainties in access element usage probabilities.
Innovation Solution
A method for access control that detects the position of a key element using radio signals, calculates the probability of use for each access element by extrapolating motion paths and comparing with database values, and adjusts access elements automatically based on predetermined threshold values to ensure both doors are opened if the probability difference is below a certain threshold, preventing the intended door from being closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If predictive access control is used to open doors early based on transponder position and motion pathway, then door opening comfort is improved, but prediction errors occur causing wrong doors to be opened
Solution Approach 1:
The system performs preliminary door opening actions based on predicted user intent. By detecting transponder position and motion pathway early, the system proactively opens doors before the user reaches them, improving comfort while managing prediction risks through probability calculations and threshold comparisons
Solution Approach 2:
The system changes the parameter of door state (closed to open) based on calculated probability values. When the probability difference between accessing a second door versus a first door falls below a predetermined threshold, the system changes the state of both doors to open, adapting the control strategy based on uncertainty parameters
2Use of energy by moving object
If only one door is opened based on probability prediction, then energy consumption is reduced, but the intended door may remain closed causing user discomfort
Solution Approach 1:
The system dynamically changes the number of doors opened based on the probability difference parameter. When uncertainty is high (probability difference below threshold), both doors are opened to ensure access comfort. When uncertainty is low, only the most likely door is opened to conserve energy, creating an adaptive energy-confort balance
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 method enhances user comfort by accurately predicting access element usage, avoiding situations where the wrong door is opened and ensuring both doors are accessible when the intended one is not clearly identified, thus compensating for inherent uncertainties in prediction calculations.
Implementation Method 1
detecting at least one position of a key element carried by a user relative to the motor vehicle by radio
Data Source
AI summary
The invention relates to an access control method for a motor vehicle. The motor vehicle has at least a first and a second access element automatically adjustable between a closed position and an open position. The method comprises at least the following steps: detecting at least one position of a key element carried by a user relative to the motor vehicle by radio; calculating a probability of use for each access element depending on the at least one detected position of the key element; adjusting both the first access element and the second access element from the closed position to the open position if: the probability of use of each of the first and second access elements is above a predetermined first threshold value; and an absolute value of a difference in the probability of use of the first and second access elements is below a predetermined second threshold value.