RKE Transponder Dynamic Configuration for False Wake-up Reduction
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Solution Overview
Problem
Conventional remote keyless entry (RKE) systems face issues with false wake-ups, short battery life, and unreliable operating ranges due to their inability to dynamically re-configure parameters in response to changing input signal conditions and application purposes.
Innovation Solution
A remote keyless entry (RKE) transponder with dynamically re-configurable parameters, including input channel selection, sensitivity, wake-up filter timing, and automatic gain control, stored in configuration registers that can be programmed and checked for parity errors, allowing for intelligent operation and improved communication with a base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transponder uses fixed parameters for signal detection, then the device structure is simple, but it causes false wake-ups and short battery life when signal conditions change
Solution Approach 1:
The patent implements dynamic parameter configuration by allowing the transponder to reconfigure its detection parameters (such as sensitivity thresholds and filter settings) based on current signal conditions. This enables the system to adapt to changing environments, reducing false wake-ups while extending battery life, thereby resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The patent changes the detection parameters dynamically based on signal quality assessments. By adjusting parameters such as wake-up thresholds and filter characteristics in response to varying signal conditions, the system maintains high detection accuracy without requiring overly complex fixed-structure designs, thus resolving the contradiction between reliability and complexity.
2Reliability
If the transponder operates continuously to ensure reliable detection, then detection reliability is improved, but battery life is reduced
Solution Approach 1:
The patent employs periodic wake-up detection where the transponder enters low-power sleep mode between detection cycles. During each wake-up period, it performs signal detection with configured parameters, then returns to sleep mode. This periodic operation maintains detection reliability while significantly extending battery life compared to continuous operation.
Solution Approach 2:
The transponder autonomously manages its power state by detecting signal conditions and self-regulating its wake-up frequency. When no signals are detected for extended periods, it extends sleep duration; when signals are detected, it wakes up more frequently. This self-service approach balances detection reliability with battery conservation without requiring continuous external control.
3Measurement precision
If the transponder uses high sensitivity settings, then detection capability is improved, but false wake-ups increase
Solution Approach 1:
The patent applies different sensitivity thresholds and filter characteristics to different detection channels or signal types. By localizing quality adjustments to specific detection contexts rather than using uniform high sensitivity across all channels, the system maintains high detection capability for valid signals while filtering out noise that would cause false wake-ups.
Solution Approach 2:
The transponder uses feedback from detection results to adjust its sensitivity settings. When false wake-ups occur, the system increases thresholds or adjusts filter parameters to reduce sensitivity; when valid signals are detected, it maintains or restores higher sensitivity. This feedback mechanism dynamically balances detection precision with false wake-up reduction.
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
The solution significantly reduces false wake-ups, extends battery life, and enhances the operating range by allowing the RKE transponder to adapt its parameters in real-time, ensuring reliable and efficient communication with the base station.
Implementation Method 1
The transponder can detect the low frequency (LF) data and transmit data to the base station via low frequency or VHF/UHF/Microwave
Data Source
AI summary
A multi-channel remote keyless entry (RKE) transponder having dynamically re-configurable input channel selection, channel disable, settable sensitivity for each channel, wake-up filter timing parameters, automatic gain control hold, internal tuning capacitor selection for each channel's antenna, minimum modulation depth requirement for input signal and bi-directional talk-back. Programmable minimum modulation depth requirement reduces false wake-up of the RKE transponder. An antenna for each channel of the RKE transponder may be tuned with internal tuning capacitors for improved range and receiver sensitivity. The internal tuning capacitor parameters may be stored in a configuration register. Gain of the channel may be fixed while the antenna is tuned. The antennas may be de-queued for talk-back to a base station for low frequency bi-directional communications. An external control device may dynamically read from and write to the configuration registers via a serial communications interface.