Acoustic Wake-Up Signaling for Low-Power Wireless BMS Nodes
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Solution Overview
Problem
Wireless battery management systems (BMS) face challenges in power consumption optimization, particularly for slave nodes that must periodically monitor wake-up signals from master nodes even in standby states.
Innovation Solution
A wake-up apparatus and method for a wireless BMS that uses a resonant sound wave with a specified frequency and digital signal pattern to wake up slave nodes, reducing power consumption by allowing monitoring in low-power states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slave nodes periodically monitor wake-up signals in standby state, then wake-up functionality is maintained, but power consumption increases
Solution Approach 1:
The patent applies acoustic vibration (sound wave) as the wake-up signal transmission medium. The master node generates a sound wave with specific frequency and pattern that propagates through the environment to wake up slave nodes, replacing the need for continuous electromagnetic signal monitoring in standby state
Solution Approach 2:
The patent substitutes electromagnetic field-based wireless communication with acoustic field-based communication for wake-up signaling. This replacement allows slave nodes to enter deeper low-power states since acoustic signals can be detected periodically without requiring continuous electromagnetic signal monitoring
2Use of energy by moving object
If slave nodes enter low-power state, then power consumption is reduced, but ability to receive wake-up signals is compromised
Solution Approach 1:
The patent implements periodic wake-up signal transmission where the master node sends sound wave signals at specific intervals. Slave nodes can remain in low-power state between intervals and only activate their acoustic sensors periodically to detect the wake-up signal, maintaining signal reception capability while minimizing power consumption
Solution Approach 2:
The patent uses specific acoustic parameters (frequency, amplitude, time pattern) to encode wake-up signals. The slave nodes are designed to detect these specific parameter patterns, allowing them to remain in low-power state while still being able to reliably detect the encoded wake-up signal when transmitted
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, extends battery life, and improves system efficiency by enabling wake-up signals to be monitored with minimal power usage, even in low-power states.
Implementation Method 1
outputting, by a master radio frequency (RF) node of a wireless battery management system, a resonant sound wave with a specified frequency
Data Source
AI summary
A wake-up apparatus and method of a wireless battery management system are disclosed, which can wake up a slave node of a wireless battery management system in a standby state using a sound wave and include a master radio frequency (RF) node configured to output a resonant sound wave with a specified frequency and a specified digital signal pattern, and a slave RF node which wakes up upon receiving the resonant sound wave output from the master RF node.