基于LabVIEW的三分量地震数据采集系统设计

Design of three-components seismic data acquisition system based on LabVIEW

快速、精确的地震数据采集是进行地震研究的基础,为了满足实际应用需求,基于LabVIEW平台和NI USB-6210信号采集卡,设计并实现一个三分量的地震信号采集系统。系统利用三分量的941b型拾振器采集地震信号,经991型六线放大器放大后接入USB-6210信号采集卡,并通过USB口传入计算机。软件部分利用LabVIEW平台实现了地震信号的实时采集,并经过数字滤波、加窗得到更加清楚的三分量地震信号,并对其进行时频域分析得到均值、峰值、信噪比、幅度、相位谱等参数。实验结果表明:此系统稳定性较高,能准确采集X、Y、Z轴三个方向的地震信号,且测量精度较高,在地震信号的采集、分析、处理方面具有一定的实用价值。

Fast and accurate seismic data acquisition is the basis of seismic research.In order to meet the needs of practical applications,a three-components seismic signal acquisition system is designed and implemented based on LabVIEW platform and NI USB-6210 signal acquisition card.The system uses a three-components 941 b type pickup to collect seismic signals.After amplification by the 991 type six-wire amplifier,it is connected to the USB-6210 signal acquisition card and transmitted to the computer through the USB port.The software part realizes the real-time acquisition of seismic signals by using LabVIEW platform,and obtains clearer three-components seismic signals through digital filtering and windowing,and performs time-frequency domain analysis to obtain mean,peak,signal-to-noise ratio,amplitude and phase spectrum.And other parameters.The experimental results show that the stability of the system is high,and the ground motion signals in the three directions of X,Y and Z axes can b e accurately collected,and the measurement accuracy is high.It has certain practical value in the collection,analysis and processing of seismic signals.