低频信号的精确采集与处理

ACCURATE ACQUISITION AND PROCESSING OF LOW FREQUENCY SIGNAL

基于LabVIEW软件平台和NI采集卡,构建了一个具有较高精度和高采样率的固体潮采集观测系统。通过对比采集观测及实例分析,结果表明:该采集系统精度较高,准确性好,具有较好的长期稳定性,可以作为固体潮及长周期形变仪器的通用采集系统。

The high precision and sampling acquisition rate observing system of the earth tides was build based on the software platform LabVIEW and acquisition cards NI. By comparing acquisition and observation and example analysis, the problems are identified and the improved projects are brought forward, and then the observation system is improved accordingly. In addition, with harmonic analysis of gravity tides and tilt tides, the long-term stability of the acquisition system is studied. The results show that the acquisition system is of high accuracy, high precision, and good long-term stability, it can serve as the general acquisition system of the earth tides and the long cycle deformation apparatus.