Seismic Sensor Node Power Management via Dynamic Mode Switching
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Solution Overview
Problem
Ocean bottom seismic data acquisition systems face significant power consumption challenges, limiting the duration of seismic data collection due to the finite power supply of sensor nodes deployed on the seabed, necessitating efficient power management strategies.
Innovation Solution
Implementing a power-saving mode in sensor nodes that switches between idle and active modes based on proximity to a seismic source boat, using a mode selection program to conserve power by shutting off non-essential devices and adjusting clock precision, thereby extending the operational life of the nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor nodes operate continuously in active mode to collect seismic data, then data collection capability is maintained, but power consumption increases significantly
Solution Approach 1:
The sensor node dynamically adjusts its operational state based on real-time conditions. The node switches between idle and active modes using a state machine that responds to trigger signals from the seismic source boat, allowing the system to adapt its power consumption profile to actual data collection needs rather than operating in a fixed continuous mode
Solution Approach 2:
The sensor node operates in periodic cycles of idle and active states. The idle mode serves as the default low-power state, and the node transitions to active mode periodically when triggered by the seismic source boat's proximity or signal, creating a rhythm of operation that balances power savings with data collection requirements
2Use of energy by moving object
If sensor nodes enter idle mode to conserve power, then power consumption is reduced, but response time to collect seismic data increases
Solution Approach 1:
The sensor node performs preliminary actions by maintaining listening mode or low-power monitoring state even during idle periods. The state machine is pre-configured with trigger conditions that allow rapid transition to active mode when the seismic source boat approaches or sends signals, so the node is ready to switch states quickly rather than requiring full wake-up from deep sleep
Solution Approach 2:
The system uses feedback from the seismic source boat's position and signal status to determine when to transition from idle to active mode. The sensor node continuously monitors for trigger signals or proximity indicators, and this feedback mechanism ensures that the node activates precisely when needed, minimizing unnecessary idle time while maintaining power savings during truly inactive periods
3Adaptability or versatility
If sensor nodes deploy autonomous operation without continuous surface connection, then operational flexibility increases, but power management complexity increases
Solution Approach 1:
The sensor node autonomously manages its own power state transitions using an internal state machine that evaluates trigger conditions and automatically switches between idle and active modes. This self-service approach eliminates the need for continuous external power management commands from the surface, allowing the node to independently optimize its power consumption based on local environmental and operational conditions
Solution Approach 2:
The sensor node integrates multiple functions within a unified power management architecture. The same state machine and trigger detection mechanism that control power state transitions also coordinate data collection, processing, and transmission activities. This multi-functionality reduces overall system complexity by using a single control framework rather than separate systems for each function
Data Source
AI summary
Embodiments of the invention provide methods, systems, and apparatus for conserving power while conducting an ocean bottom seismic survey. Sensor nodes placed on an ocean floor may be configured to operate in at least an idle mode and an active mode. Each node may adjust its mode of operation from idle mode to active mode.