Chained Data Acquisition and Transmission System Protype for Cabled Seafloor Earthquake Observatory
Authors:Qiao, Jingyang Liu, Wu Liu, Jingquan Zhou, Jianping
Volume:9
Published:2021
Document Type:Article
Abstract:Seafloor observatories can provide long-term, real-time submarine monitoring data, which has great significance for the study of major scientific technology in marine science, especially in the seafloor earthquake observation. The chained submarine data sampling and transmission system is the prototype and foundation of cabled seafloor earthquake observatories. This paper designs and builds a chained data sampling and transmission system (SQSTS) based on Zynq-7000 Soc (System on chip) and clock synchronization. At the beginning, we realized high-precision submarine data (24 bit) sampling based on Zynq-7000 Soc and ADS 1256. Using the PPS (Pulse per second) signal provided by the P88 1588 PTP (Precise time protocol) clock synchronization board and the inner crystal oscillator of the Zynq-7000 Soc, the time stamp up to the microsecond level, for the seismic data sampled in each seismometer node can support subsequent inversion of seismic data. In addition, a high-speed data transmission link connecting nodes in SQSTS, which is based on the Gigabit transceiver and optical cable, has been investigated. The transmission link has been realized by using the Aurora IP core. The theoretical calculations indicate that the data transmission bus bandwidth can reach 4 Gbps, while in the meantime its reliability has been proved by experiments. The experimental results show that the system owns the characteristics of high data sampling accuracy, stable and reliable high-speed transmission, and has promising application prospects.
Author Information
Corresponding Author:Liu, W (通讯作者)，Shanghai Jiao Tong Univ, Natl Key Lab Sci & Technol Micro Nano Fabricat, Shanghai 200240, Peoples R China.
Reprint Address:Liu, W (通讯作者)，Shanghai Jiao Tong Univ, Natl Key Lab Sci & Technol Micro Nano Fabricat, Shanghai 200240, Peoples R China.
Addresses:[Qiao, Jingyang; Liu, Wu; Liu, Jingquan] Shanghai Jiao Tong Univ, Natl Key Lab Sci & Technol Micro Nano Fabricat, Shanghai 200240, Peoples R China; [Qiao, Jingyang] Shanghai Jiao Tong Univ, Dept Micro Nano Elect, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China; [Zhou, Jianping] Minist Nat Resources, Key Lab Submarine Geosci, Hangzhou 310012, Peoples R China; [Zhou, Jianping] Minist Nat Resources, Inst Oceanog 2, Hangzhou 310012, Peoples R China
E-mail Addresses:qjy19971022@sjtu.edu.cn; liuwu@sjtu.edu.cn; jqliu@sjtu.edu.cn; zhoujp@sio.org.cn