Wireless Sensor Mode Transition for Battery Conservation
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Solution Overview
Problem
Wireless sensors used for measuring environmental conditions in facilities face challenges due to high battery consumption, requiring frequent replacements and potential noncompliance with data recording requirements.
Innovation Solution
A sensor device configured to maintain a connection between a wireless network interface controller and a wireless local network in both low power and active modes, transitioning between modes based on wake and low power commands to conserve battery life, allowing for efficient data collection and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor device operates continuously in active mode to collect and transmit data, then data recording compliance is improved, but battery consumption increases
Solution Approach 1:
The sensor device alternates between active mode and low power mode in periodic cycles. During active mode, the sensor collects environmental data and transmits it to the server. During low power mode, the sensor device enters sleep state to conserve battery. This periodic operation ensures data compliance is maintained while significantly reducing overall battery consumption compared to continuous operation.
2Duration of action of moving object
If the sensor device transitions to low power mode to conserve battery, then battery life is extended, but data acquisition continuity may be compromised
Solution Approach 1:
The sensor device performs data collection and transmission in advance during active mode before transitioning to low power mode. By completing data acquisition tasks preliminarily while powered, the device ensures data continuity is maintained even during extended low power periods, thus extending battery life without compromising data recording compliance.
3Loss of time
If the sensor maintains frequent wake cycles to collect and transmit data, then data freshness is improved, but power consumption increases
Solution Approach 1:
The sensor device implements periodic wake cycles where it transitions from low power mode to active mode at scheduled intervals to collect fresh environmental data and transmit it to the server. After completion, it returns to low power mode. This periodic action balances data freshness requirements with power conservation, avoiding continuous operation while ensuring timely data updates.
Data Source
AI summary
The present sensor device, system and method provides tools for measuring, recording local environmental conditions, such as temperature and humidity, and wirelessly transmitting the collected data to a server. The sensor device is configured to, under normal operation, maintain the connection between the wireless network interface controller and the wireless local network so that various commands and/or communications can be received, whether the sensor device is in a low power mode or in an active mode. The sensor device cycles between the low power mode and the active mode, and back to the low power mode. Where in each active mode cycle, the sensor device is configured to acquire a measurement from sensor for storage in local memory, and/or transmit historical data acquired to the server, and/or check for updates by connecting to the server. By normally remaining in a low power mode and only waking periodically to conduct a task, battery life is greatly extended.