一种基于嵌入式的高精度同步授时系统  

A high⁃precision synchronous timing system based on embedded system

作　　者：王蕾[1] 李淑婧[1] 刘萍妮 刘军 WANG Lei;LI Shujing;LIU Pingni;LIU Jun(Aviation Swarm Technology and Operational Application Laboratory,College of Air Traffic Control and Navigation,Air Force Engineering University,Xi’an 710051,China)

机构地区：[1]空军工程大学空管领航学院航空集群技术与作战运用实验室,陕西西安710051

出　　处：《现代电子技术》2023年第6期7-10,共4页Modern Electronics Technique

基　　金：陕西省电子信息系统综合集成重点实验室基金资助的课题。

摘　　要：为满足协同交互和智能敏响,集群成员和网络节点各要素之间的授时同步精度指标尤为关键。为此,文中设计一种基于嵌入式的高精度同步授时传输系统。通过将DSP和FPGA功能紧密耦合,结合ADC/DAC射频前端,选用BD/GPS双模收发模块,使用芯片内核和硬件描述语言设置串行端口在线调试,实现系统功能。系统选用的ATGM332D高灵敏度接收机模块属于国产BD/GPS双模接收模块,可有效提高系统的国产化率。系统接收卫星信号,经过内部解析和编译生成高精度同步脉冲信号。最后,通过实验对传统秒脉冲装置和同步授时系统性能进行对比分析。结果表明:所设计系统集群成员之间的同步精度误差远小于200 ns,优于传统秒脉冲装置,可满足高速数据传输和高精度定位同步需求;同时,该系统具备高可靠通信速率、集群间协同速率、体积小、重量轻、精度高、便于多例化实现的特点,已成功应用于某型无人机集群的机载设备,可为实现集群化和网络化提供技术基础。In order to meet the requirements of collaborative interaction and intelligent response,the synchronous timing accuracy index between cluster members and network nodes is particularly important.Therefore,a high⁃precision synchronous timing transmission system based on embedded system is proposed.By tight coupling the DSP and FPGA functions,and in combination with ADC/DAC RF(radio frequency)front end,BD/GPS dual⁃mode transceiver module is selected,and the chip core and hardware description language is used to set the online debugging of serial port,so as to realize the system functions.The ATGM332D high sensitivity receiver module is selected for the system,which is BD/GPS dual⁃mode receiving module made in china,and can effectively improve the localization rate of the system.The system can receive satellite signals and generate high⁃precision synchronous pulse signals by means of internal analysis and compilation.The performance of traditional second pulse device and synchronous timing system is compared and analyzed by the experiments.The results show that the synchronization accuracy error between the cluster members of the designed system is far less than 200 ns,which is better than the traditional second pulse device,and can meet the requirements of high⁃speed data transmission and high⁃precision positioning synchronization.The system has the characteristics of high reliable communication rate,inter⁃cluster cooperation rate,small size,light weight,high precision,and easy to implement in multiple instances.It has been successfully applied to the airborne equipment of a certain type of UAV cluster,which can provide a technical basis for achieving clustering and networking.

关 键 词：同步授时系统 在线调试 内部解析 数据传输 高精度定位 集群通信 高速数据交互 对比分析 

分 类 号：TN915-34[电子电信—通信与信息系统] TP302[电子电信—信息与通信工程]