宽频带地震仪数据采集及压缩传输的研究  

Research on data acquisition,compression and transmission of broadband seismograph

作　　者：王巨龙 张怀柱[1,2] 玄金鹏 WANG Julong;ZHANG Huaizhu;XUAN Jinpeng(College of Instrument Science&Electrical Engineering,Jilin University,Changchun 130026,China;Research Center of National Geophysical Exploration Instrument Engineering Technology,Changchun 130062,China)

机构地区：[1]吉林大学仪器科学与电气工程学院,吉林长春130026 [2]国家地球物理探测仪器工程技术研究中心,吉林长春130062

出　　处：《现代电子技术》2020年第4期100-103,共4页Modern Electronics Technique

基　　金：国家重点研发计划项目(2018YFC0603204)

摘　　要：宽频带地震仪以记录天然地震数据为目的设计,具有信号采集精度高、频率范围宽、动态信号采集范围大等优点。为满足对天然地震信号的实时准确采集,采用24位Δ∑型过采样调制器和数字抽取滤波器构成24位模数转换电路,利用Steim2压缩算法对数据进行实时压缩,并通过FTP(File Transfer Protocol)通信协议进行数据传输。通过自身噪声数据计算得出仪器的动态范围可达到140.83 dB。利用该仪器对天然地震进行观测。由实验数据可知,压缩比最大达2.18∶1,传输效率最大提高67%。实验结果表明,利用Steim2实时压缩算法能够有效利用存储空间,显著提高数据传输效率。The broadband seismograph is designed for the purpose of recording earthquake data,which has the advantages of high signal acquisition accuracy,wide frequency domain and large dynamic signal acquisition range.The 24⁃bit analog⁃to⁃digital conversion circuit consists of the 24⁃bitΔΣ⁃type oversampling modulator and the digital decimation filter,the data is compressed in real time by means of the Steim2 compression algorithm and transmitted with the FTP(file transfer protocol)communication protocol.The dynamic range of the instrument can reach 140.83 dB,which is obtained by calculating the self⁃noise data.With this instrument to observe the natural earthquakes,it can be seen from the experimental data that the maximum compression ratio is 2.18:1,and the transmission efficiency is increased by 67%to the maximum.The experimental results indicate that the Steim2 real⁃time compression algorithm can effectively utilize the storage space and significantly improve the data transmission efficiency.

关 键 词：宽频带地震仪 数据采集 数据压缩 电路设计 数据传输 系统测试 

分 类 号：TN919-34[电子电信—通信与信息系统] P631.4[电子电信—信息与通信工程]