A High-Precision Energy-Efficient GPS Time-Sync Method for High-Density Seismic Surveys
| Autor: | Yuda Chen, Hongyuan Yang, Yuanjie Jiang, Junjie Zhang, Longxu Wang, Jun Lin, Linhang Zhang, Shuai Zhang, Ruyun Tian |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Seismometer
010504 meteorology & atmospheric sciences Computer science Real-time computing sync 010502 geochemistry & geophysics lcsh:Technology 01 natural sciences lcsh:Chemistry Intercept method Synchronization (computer science) General Materials Science Data synchronization time synchronization lcsh:QH301-705.5 Instrumentation 0105 earth and related environmental sciences Fluid Flow and Transfer Processes lcsh:T business.industry Process Chemistry and Technology energy-efficient General Engineering lcsh:QC1-999 Computer Science Applications high-precision lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Seismic array Global Positioning System lcsh:Engineering (General). Civil engineering (General) business high-density seismic survey Wireless sensor network lcsh:Physics |
| Zdroj: | Applied Sciences Volume 10 Issue 11 Applied Sciences, Vol 10, Iss 3768, p 3768 (2020) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app10113768 |
| Popis: | Large numbers of seismic channels and high-density energy-efficient acquisition systems are the development trend of seismic instruments and have attracted high R& D interests in recent years. The combination of remote sensing and wireless sensor network technology provides superior observation capabilities for high-density seismic exploration. However, large-scale and multi-node acquisition methods place higher requirements on time synchronization performance. Seismic data with poor time synchronization will cause considerable errors in the interpretation of seismic data and even have no practical significance. Thus, the strict time synchronization performance is the prerequisite and basis for the application of cable-less storage seismograph in high-density seismic array applications. The existing time synchronization methods have high power consumption and poor time synchronization accuracy, which is not suitable for the long-time task. In addition, these methods are affected by the number of nodes and the distance. This paper presents an energy-efficient time-sharing indexed interpolation intercept method for the seismic data synchronization. The time synchronization method uses the high-precision TCXO as the main clock and records GPS time in the SD card at intervals to achieve the high-precision timestamp for the seismic data. Then the seismic data is intercepted intermittently based on precise time stamps, which achieves the strict seismic data synchronization. Performance analysis shows that the time synchronization accuracy of the proposed method is 0.6 &mu s and saves 73% energy of the time-sync periods compared to the common GPS timing method. The field measurement results indicate that the time synchronization accuracy is not associated with the working time and the distance between nodes so that the proposed synchronization method is suitable for the high-density seismic survey. |
| Databáze: | OpenAIRE |
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