GPS多天线变形监测系统的数据采集与控制

针对大型GPS变形监测项目成本高的问题，研究了GPS多天线技术，实现了一机对多点的监测。基于PCI04硬件平台，在VisualC＋＋6．0下开发了GPS多天线系统的数据采集与控制软件，实现了多天线微波开关的控制、与GPS接收机的通信以及GPS信息的RINEX标准格式转化。实验表明，该技术对GPS信噪比和测量精度几乎没有影响，而且大大降低了变形监测系统的成本，具有重要的经济价值和社会价值。

Data acquisition and control of deformation monitoring system using multi-antenna GPS

In order to solve high cost problem of deformation monitoring of large scale project with global positioning system （GPS） , GPS multi-antenna technology was proposed to facilitate multi-objects monitoring with one GPS receiver. Software of GPS multi-antenna data acquisition and control system was developed in the proposed research with Visual C ＋ ＋ 6.0 programming language, the software was tested and operated in PC-104 hardware to realize： （ 1 ） control of multi-antenna microwave switch ; （2） communication with GPS receiver; （3） standard conversion from GPS raw data to RINEX format. Based on the experiments of prototype system built, it is concluded that the system could minimize costs of deformation monitoring with less deterioration to signal-to-noise and measure accuracy of GPS, therefore has great commercial and social value for future application.