Sensor Node Clock Synchronization via Wireless Pulse
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Solution Overview
Problem
In survey data acquisition systems, clock signal drift in sensor nodes leads to desynchronization with the master clock, resulting in inaccuracies and errors during data processing.
Innovation Solution
A wireless synchronization signal is transmitted to sensor nodes to adjust their clock frequencies and apply re-sampling interpolation techniques, ensuring synchronization with the master clock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensor nodes operate autonomously with independent clock signals, then device complexity is reduced and ease of operation is improved, but clock signal drift causes desynchronization with the master clock resulting in measurement precision degradation and data processing errors
Solution Approach 1:
The system transmits a synchronization signal from the master clock to sensor nodes, creating a feedback mechanism that allows nodes to detect and correct their clock drift. The sensor nodes compare their local clock signals against the received synchronization signal and adjust accordingly, maintaining synchronization without requiring complex centralized control.
Solution Approach 2:
The master clock transmits synchronization signals at predetermined intervals before significant drift accumulation occurs. This preliminary action prevents desynchronization from reaching critical levels, ensuring measurement precision is maintained throughout the autonomous operation period.
2Measurement precision
If wireless synchronization signals are transmitted to sensor nodes, then synchronization accuracy with the master clock is improved, but use of energy increases due to continuous signal transmission and reception
Solution Approach 1:
The synchronization signal is transmitted periodically at optimized intervals rather than continuously. This periodic action maintains synchronization accuracy by correcting drift at appropriate intervals while significantly reducing energy consumption compared to continuous transmission. The interval is calibrated to balance synchronization precision requirements with energy conservation.
3Measurement precision
If re-sampling interpolation techniques are applied to correct clock drift, then measurement precision is maintained, but device complexity increases due to additional processing requirements
Solution Approach 1:
The system uses an intermediary synchronization signal as a reference mediator between the master clock and sensor nodes. Rather than implementing complex real-time drift compensation algorithms in each node, the synchronization signal serves as a shared reference that simplifies the processing requirements. Nodes only need to compare their local clocks against this intermediary signal and apply straightforward re-sampling interpolation when needed.
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 maintains accurate synchronization of sensor nodes with the master clock, reducing errors and ensuring precise data processing in survey data acquisition systems.
Implementation Method 1
synchronized to an electromagnetic wave pulse that is transmitted through a medium
Data Source
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AI summary
In some examples, a sensor node comprises a sensor to measure survey data of a target structure. The sensor node receives a wireless synchronization signal, and synchronizes an operation of the sensor node based on the wireless synchronization signal.