摘要
采用分立的改进型VCO设计了一种光泵磁力仪的跟踪锁定环路,并利用后继的中央控制器来完成辅助捕获功能。实验表明环路能获得1Hz的跟踪精度,失锁后的重新捕获时间小于5s。相比于在系统中应用手动电调或专门的辅助捕获电路,该跟踪系统充分利用了后继中央控制器的富余资源,减小了设备的复杂性和体积;加之运用廉价的分立元件构建VCO单元,进一步降低了成本,因此具有良好的应用前景。
The discrete modified VCO was adopted to design an automatic catching and tracking loop in optical pumping magnetometer,and its auxiliary catching function was achieved with the subsequent central controller.The experiment indicates that the loop can realize the tracking accuracy of 1 Hz,and the renewed catching time is less than 5 s.Compared to the manual adjustment or special auxiliary catching circuits,this tracking system takes advantage of the redundant resources of the subsequent central controller,and reduces complexity and size of the equipment.Furthermore,the VCO modules are built with cheap discrete components,so that the cost is reduced further more.All of the above shows the favourable applied prospects.
出处
《现代电子技术》
2012年第13期149-151,154,共4页
Modern Electronics Technique
基金
安徽省软科学研究计划项目(10030503073)
安徽省教育厅重点项目(KJ2011Z153)
安徽省自然科学基金项目(11040606M137)
四川省科技攻关项目(M110106012009FZ0148)
关键词
光泵磁力仪
VCO
相敏检波
辅助捕获
optical pumping magnetometer
VCO
phase-sensitive detection
auxiliary catching
