Vehicle Door Locking Control via Variable Signal Transmission Periods
Solution Overview
Problem
Existing vehicle-mounted electronic key systems with automatic locking functions face challenges in efficiently managing door unlocking times and mobile terminal power consumption, often leading to prolonged door unlocking periods and increased power usage when users stay near the vehicle.
Innovation Solution
A vehicle-mounted device that transmits response request signals at varying intervals, initially at a short period to detect user exit and then at a longer period after a set time, allowing for timely door locking and reducing mobile terminal power consumption by minimizing response signal frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle-mounted device sequentially transmits signals to the mobile terminal at a predetermined transmission period to determine whether the mobile terminal moves out of the wireless communication range, then the automatic locking function can be implemented, but the power consumption of the mobile terminal increases and the door unlocking period is prolonged
Solution Approach 1:
The patent applies dynamics by making the transmission period variable rather than fixed. The control unit adjusts the transmission period dynamically: setting it to a first (shorter) period when the mobile terminal is detected near the vehicle, and a second (longer) period when the mobile terminal moves away. This dynamic adjustment reduces unnecessary frequent transmissions when the user is not nearby, thereby reducing power consumption while maintaining reliable automatic locking functionality when needed.
Solution Approach 2:
The patent changes the parameter of transmission period based on the detected position of the mobile terminal. When the mobile terminal is within a predetermined distance from the vehicle, the transmission period is set to a first value; when beyond that distance, it is set to a second value. This parameter change optimizes the balance between maintaining communication reliability for automatic locking and reducing power consumption by avoiding excessive transmissions when the user is far away.
2Ease of operation
If the vehicle-mounted device keeps the door in an unlocked state for a long period after user exit, then the user convenience is improved, but the security risk increases and the door unlocking period is prolonged
Solution Approach 1:
The patent implements feedback by continuously detecting the position of the mobile terminal relative to the vehicle and using this information to control the door locking state. The control unit monitors whether the mobile terminal is within the predetermined distance and automatically adjusts the door locking/unlocking state based on this feedback. This ensures the door remains unlocked only when the user is nearby (maintaining security) while still providing convenient automatic unlocking when the user returns (maintaining ease of operation).
Data Source
AI summary
In a vehicle-mounted device, a first time period measuring unit starts measurement of a first time period when detecting an exit movement of a user. Before an elapse of the first time period, a vehicle side transmission unit periodically transmits a response request signal at a predetermined transmission period; and a locking and unlocking control unit keeps a door unlocked while receiving a response signal, locks the door when incapable of receiving the response signal, and keeps the door unlocked when capable of receiving the response signal at the elapse of the first time period. After the first time period is elapsed, the vehicle side transmission unit periodically transmits the response request signal at a second time period; and the locking and unlocking control unit keeps the door unlocked while receiving the response signal, and locks the door when incapable of receiving the response signal.