Vehicle Electronic Key Vibration Detection Flag Power Optimization
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Solution Overview
Problem
Existing vehicle electronic keys consume excessive power due to frequent communication between the acceleration sensor and the key controller, as they continuously detect and notify acceleration to maintain a response permission state, which is not necessary when the key is not in use.
Innovation Solution
The vehicle electronic key employs a vibration detection flag set by the acceleration sensor, allowing the key controller to periodically check the flag instead of receiving continuous acceleration data, reducing unnecessary communication and power consumption by switching between response permission and sleep states based on detected vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the acceleration sensor continuously detects and notifies acceleration data to the key controller, then the response permission state can be maintained, but the power consumption increases
Solution Approach 1:
The acceleration sensor operates in a periodic manner, performing detection at predetermined intervals rather than continuously. The sensor switches between detection periods and stop periods, transmitting data only during detection periods. This periodic operation reduces power consumption while maintaining the ability to detect vibrations and maintain response permission state when needed.
2Reliability
If the acceleration sensor frequently communicates with the key controller, then the response permission state can be accurately maintained, but the device complexity increases
Solution Approach 1:
The acceleration sensor autonomously determines when to perform detection and when to stop based on predetermined intervals, without requiring continuous control commands from the key controller. The sensor independently manages its own detection cycles and data transmission timing, reducing the complexity of communication control while ensuring accurate response permission state maintenance.
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 approach significantly reduces power consumption by minimizing the frequency of communication between the acceleration sensor and the key controller, optimizing battery life and reducing operational costs.
Implementation Method 1
an acceleration sensor that detects an acceleration applied to the vehicle electronic key and sets a vibration detection flag based on a determination that a vibration equal to or greater than a threshold value has been detected according to a detected acceleration
Data Source
AI summary
A vehicle electronic key includes: a receiver for receiving a request signal transmitted from an in-vehicle device; a transmitter for transmitting a response signal responding to the request signal; a key controller that determines whether the request signal has been received and controls the transmitter to transmit the response signal based on a determination that the request signal has been received; and an acceleration sensor that detects an acceleration applied to the vehicle electronic key and sets a vibration detection flag based on a determination that a vibration equal to or greater than a threshold value has been detected according to a detected acceleration.