摘要
低频时码授时技术是目前国际上关注的授时技术,为了提高低频时码授时的精度,需要对发播信号质量进行长期的监测。本文介绍了利用虚拟仪器设计软件LabVIEW和采集卡在通用PC平台上开发的一套低频时码授时发播信号的实时监测系统。在该系统中,利用LabVIEW控制2块采集卡NIPCI6111和NIPCI6250实时地采集数据,分别进行场强测量和载波相位测量,同时还具有频谱分析、解调判决及存盘等功能。该系统能够较好地完成测量任务,满足实际应用的需求。
Low-frequency time-code technology is concerned in time service methods at present. It is absolutely necessary to monitor the receiving signal to increase the time precision. The paper introduced a BPC real-time monitoring system based on software LabVIEW, DAQ cards and general PC platform. In this system, the datum acquired by NI PCI-6111 and NI PCI-6250, which are controlled by LabVIEW, are used for field strength and carrier phase measurement separately. Furthermore, it has many functions, such as spectrum analysis, de-modulation and saving data modules. The system works well and meets the needs.
出处
《国外电子测量技术》
2007年第2期60-62,共3页
Foreign Electronic Measurement Technology
关键词
虚拟仪器
实时监测
场强测量
相位测量
virtual instrument
real-time monitor
field strength measurement
phase measurement
