Remote Device Battery Life Extension via Motion-Triggered Mode Switching
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Solution Overview
Problem
Current passive-entry, passive-start (PEPS) systems for vehicles require remote devices to remain constantly powered on, leading to rapid battery drain, as they must continuously detect the vehicle's presence, even when not in use.
Innovation Solution
Implementing a method where the remote device enters a low power 'sleep mode' unless it detects proximity to the vehicle and is in motion, activating the wireless communication module only when necessary to conserve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the remote device remains constantly powered on to detect vehicle presence, then the PEPS system functionality is maintained, but the battery life is rapidly depleted
Solution Approach 1:
The patent applies dynamics by transitioning the remote device between different operational states (low power mode and active mode) based on motion detection. The device dynamically adjusts its power consumption characteristics by evaluating motion data from accelerometers and transitioning wireless communication modules between low power mode and active mode, resolving the contradiction between maintaining functionality and conserving battery life.
Solution Approach 2:
The patent changes the operational parameters of the remote device based on detected conditions. When motion is detected, the system changes parameters by activating the second mode communication module and transitioning from low power mode to active mode. This parameter change allows the device to maintain PEPS functionality when needed while minimizing power consumption during stationary periods.
2Speed
If the wireless communication module remains in active mode to ensure immediate response, then the PEPS response time is reduced, but the power consumption increases
Solution Approach 1:
The patent implements periodic action by using motion detection events as triggers for mode transitions. Instead of maintaining continuous active monitoring, the system periodically evaluates motion data and transitions communication modules between low power mode and active mode based on detected motion, achieving energy-efficient operation while maintaining responsive PEPS functionality when motion occurs.
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 extends the battery life of remote devices by minimizing unnecessary power consumption while maintaining the functionality of the PEPS system when the device is in use.
Implementation Method 1
polls an internal accelerometer of the remote device to obtain internal accelerometer data; analyzes the obtained internal accelerometer data to determine whether the remote device is in motion
Data Source
AI summary
A method for activating a remote device is provided. In response to a determination that a remote device is within a first mode signal range of a vehicle and the remote device is moving, the method activates a second mode communication module of the remote device.