Electronic Key Sensitivity Switching for Faster Vehicle Door Unlocking
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Solution Overview
Problem
High reception sensitivity of electronic keys to wireless signals causes delays in determining the key's location, leading to slow locking or unlocking of vehicle doors, especially when the key is outside the vehicle.
Innovation Solution
A vehicle system with a processor, receiver unit, and transmission unit that receives confirmation signals from an electronic key, determines its location, and transmits signals to lower the key's reception sensitivity when necessary, allowing for quicker locking or unlocking based on touch operations at the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the reception sensitivity of the electronic key is raised to enable remote parking assistance control, then the electronic key can receive wireless signals when the user is farther from the vehicle, but the electronic key is more likely to receive signals when located outside the vehicle, causing delays in determining key location and slow door locking response
Solution Approach 1:
The electronic key dynamically switches between high reception sensitivity mode (for remote parking assistance) and low reception sensitivity mode (for normal operation). The control unit adjusts the reception sensitivity based on the operational context, enabling the system to optimize between extended range and quick location determination depending on whether remote parking assistance is active
Solution Approach 2:
The reception sensitivity parameter of the electronic key is made variable rather than fixed. The control unit changes the reception sensitivity parameter between high and low states based on whether the vehicle is in remote parking assistance mode, allowing the system to adapt the key's signal reception characteristics to the current operational requirements
2Adaptability or versatility
If the reception sensitivity of the electronic key is high, then parking assistance control can be implemented at a distance, but it becomes difficult for the vehicle to quickly determine that the electronic key is located outside the vehicle when the door is touched
Solution Approach 1:
The electronic key's reception sensitivity is made dynamic, switching between high and low states based on operational mode. During remote parking assistance, high sensitivity enables distant communication; during normal operation, low sensitivity enables rapid location determination when the door is touched, resolving the contradiction between adaptability and speed
Solution Approach 2:
The system preemptively lowers the reception sensitivity when remote parking assistance is not active, preventing the potential harm of delayed location determination before it can occur. This preliminary adjustment ensures that when the door is touched, the system is already in the optimal state for quick location determination
Data Source
AI summary
Switching signals are transmitted that cause a reception sensitivity to wireless signals of an electronic key to be lowered.