摘要
介绍了一种应用于广播电视方面的高精度时钟授时系统。该系统可以通过无线电广播的整点报时信号或中央电视台16行时间编码脉冲信号或GPS卫星接收数据中的标准时间进行校时。三种方式互为备份,提高了系统安全性。通过ZigBee无线方式将当前的精确时间发送到各个时钟发布点,无须布线,提高了系统的抗干扰性。文中详细介绍了此时钟授时系统的系统结构。系统采用基于PIC18F4620为核心的控制单元,完成了系统硬软件设计,给出了系统硬件体系结构图和系统软件设计。
This paper presents a high-precision Clock Timing System for radio and television. It can be applied to check time by the whole point of time signals, 16h time encoding pulse signal from CCTV, the standard time of receiving data from GPS, and backup each other through three modes to enhance system security. ZigBee wireless will sent the current precise time to all clock release points to improve anti-jamming performance but not to wiring. The paper describes the architecture of the clock timing system. We provide its hardware plans and software design note, and complete its hardware and software design based on PIC 18F4620 as a control unit core.
出处
《自动化与仪器仪表》
2008年第5期15-18,共4页
Automation & Instrumentation
基金
安徽工程科技学院教研资助项目(ME0214)
安徽省教育厅重点项目编号KJ2008A01ZC
