Seismic Sensor Package Self-Calibration and Clock Synchronization
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Solution Overview
Problem
Existing seismic data acquisition systems face challenges in achieving accurate calibration of dynamic range sensors and time synchronization across networks, leading to measurement uncertainties and synchronization losses, which affect the precision of hydrocarbon reservoir location determination.
Innovation Solution
Integrating multiple accelerometers with different dynamic ranges into a single sensor package for self-calibration and using a processor to synchronize clock signals based on communication protocols, along with implementing mesh communication networks for synchronized data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple accelerometers with different dynamic ranges are integrated into a single sensor package, then measurement accuracy and dynamic range are improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple accelerometers with different dynamic ranges into a single sensor package, combining multiple sensing elements to achieve extended dynamic range and improved measurement accuracy. The sensor package includes a first accelerometer with a first dynamic range and a second accelerometer with a second dynamic range, where the ranges overlap to enable self-calibration.
Solution Approach 2:
The sensor package performs self-calibration by utilizing the overlapping measurement range between multiple accelerometers. The system automatically compares and calibrates the accelerometers against each other without external reference, reducing calibration uncertainties and improving measurement reliability.
2Measurement precision
If clock synchronization is performed based on communication protocols with expected transmission delay, then time synchronization accuracy is improved, but processing time and system complexity increase
Solution Approach 1:
The system pre-calculates and stores expected transmission delays based on communication protocols before actual data transmission occurs. During operation, the processor retrieves these pre-computed delay values to synchronize clock signals, avoiding real-time complex calculations and reducing processing time.
Solution Approach 2:
The clock synchronization process uses feedback from received clock signals to adjust and synchronize the local clock. The processor compares received clock signals with expected timing based on communication protocols and transmission delays, making real-time adjustments to maintain accurate time synchronization.
3Reliability
If mesh communication networks are implemented for data transmission, then network coverage and reliability are improved, but device complexity and energy consumption increase
Solution Approach 1:
The communication network is segmented into multiple mesh nodes with hierarchical communication ranges. Each node acts as both a client and a router, forwarding data between nearby nodes. This segmentation enables extended network coverage without requiring a single complex centralized system, improving reliability through distributed architecture.
Data Source
AI summary
A sensor package may include a sensor housing unit and a first sensor that may acquire a first set of measurements within a first measurement range. The sensor package may also include a second sensor configured to acquire a second set of measurements within a second measurement range. The first measurement range and the second measurement range may include an overlapping range used to calibrate the first set of measurements, the second set of measurements, or both.