Electronic Key System Acceleration-Based Wake Control
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Solution Overview
Problem
Existing electronic key systems for leisure vehicles face issues with battery life due to frequent transitions from sleep mode to active mode, leading to wasteful power consumption and increased risk of portable device loss, especially during acceleration and travel.
Innovation Solution
An electronic key system that transmits a confirmation signal only when the vehicle reaches a predetermined acceleration value, causing the portable device to transition from sleep mode to active mode and respond, with an alarm triggered if no response is received within a set time, thereby reducing power consumption and detecting loss more reliably.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic key controller transmits confirmation signals at predetermined time intervals, then the portable device can be monitored for loss, but the battery power consumption increases due to frequent wake-ups from sleep mode
Solution Approach 1:
The system dynamically adjusts the confirmation signal transmission based on vehicle acceleration states. The electronic key controller monitors acceleration and only transmits confirmation signals when acceleration exceeds a predetermined threshold, making the monitoring active only when the vehicle is moving. This resolves the contradiction by making the monitoring reliability conditional on vehicle motion rather than continuous, thereby reducing unnecessary battery consumption during stationary periods while maintaining loss detection capability when needed.
Solution Approach 2:
The system changes the operational parameters of the confirmation signal transmission based on acceleration conditions. When acceleration is below the threshold, the transmission parameter is set to inactive; when acceleration exceeds the threshold, the transmission parameter switches to active. This parameter change approach allows the system to maintain reliable loss detection during vehicle motion while minimizing power consumption during stationary periods, effectively resolving the contradiction between reliability and energy usage.
2Reliability
If the portable device transitions to active mode frequently to respond to confirmation signals, then loss detection reliability improves, but battery life decreases
Solution Approach 1:
The portable device's operational state is dynamically controlled based on received acceleration information. When the device receives confirmation that the vehicle is stationary (acceleration below threshold), it remains in sleep mode. When it receives confirmation of vehicle motion (acceleration above threshold), it transitions to active mode to monitor for loss. This dynamic state management ensures the device only consumes power when the vehicle is moving, extending battery life while maintaining loss detection reliability during motion.
Solution Approach 2:
The system uses preliminary acceleration information transmission from the electronic key controller to pre-condition the portable device's operational state. Before the portable device needs to actively monitor, it receives advance notification of the vehicle's motion state through acceleration data. This allows the device to proactively adjust its power state rather than reacting to continuous signal transmissions, thereby extending battery life while maintaining readiness for loss detection when the vehicle is in motion.
3Reliability
If the electronic key controller continuously monitors for portable device presence, then loss prevention reliability improves, but the system complexity and power consumption increase
Solution Approach 1:
The monitoring function is applied locally and selectively based on vehicle motion state rather than uniformly across all time periods. The electronic key controller implements different monitoring qualities: active monitoring when acceleration exceeds the threshold, and inactive monitoring when acceleration is below the threshold. This local quality approach simplifies the overall system operation by eliminating unnecessary monitoring during stationary periods while maintaining rigorous monitoring during motion, thereby reducing complexity without compromising loss prevention reliability when needed.
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 configuration extends battery life by minimizing unnecessary power usage and effectively prevents portable device loss during acceleration and travel, enhancing the system's reliability and practicality.
Implementation Method 1
a portable device configured to transmit a user identification code by radio
Implementation Method 2
when acceleration of the leisure vehicle has an acceleration value higher than a predetermined acceleration value
Data Source
AI summary
An electronic key system for a leisure vehicle is provided. The electronic key system may include a portable device configured to transmit a user identification code, and an electronic key controller that is configured to receive the user identification code and to cause an electric power supply of the leisure vehicle to be turned on upon receiving the user identification code. The electric key controller may be configured to transmit a confirmation signal when acceleration of the leisure vehicle is higher than a predetermined acceleration value, and the portable device may be configured to, upon receiving the confirmation signal, transition from a sleep mode to an active mode to transmit a response signal to the electronic key controller. The electronic key controller may be configured to output a control signal to cause an alarm to be raised when no response signal is received.