基于虚拟仪器的低频时码发播信号实时监测系统  

Real-time monitoring system of BPC based on virtual instrument

作　　者：刘智芳[1] 吴贵臣[2] 冯平[1] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院国家授时中心,临潼710600

出　　处：《国外电子测量技术》2007年第2期60-62,共3页Foreign Electronic Measurement Technology

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.

关 键 词：虚拟仪器 实时监测 场强测量 相位测量 

分 类 号：TN943.6[电子电信—信号与信息处理]