无线分布式测试系统时间统一技术的研究  

The Research of Wireless Distributional Test System Time Synchronization Technology

作　　者：张九宾[1] 张丕状[1] 杜坤坤[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051

出　　处：《核电子学与探测技术》2010年第3期380-384,共5页Nuclear Electronics & Detection Technology

摘　　要：时间统一是无线分布式传感测试系统的重要组成部分,为了对测得的结果进行统一的分析和处理,时间统一的一致性和精确性至关重要。论文对时间统一的基准性以及时钟频率的校准进行重点研究,主控单元通过GPS秒脉冲沿触发并无线发送授时命令,测试单元采用软件与硬件结合的机制实现时统基准信号的产生,并根据基准信号对时钟频率进行校准,从而达到对随机事件触发的同步采样。根据测试,采用这种方式的同步误差为微秒级,可广泛应用于航空航海等工程领域。The time synchronization is the wireless distributional sensor test system＇s important component. In order to obtain the result carries on the unification the analysis and processing, the time synchronization＇s consistency and the accuracy is very important. The article is precisely researching the uniformi- ty of time synchronization and clock rate calibration- Through a GPS second pulse along triggering and translation timing order. The test unit uses the mechanism which the software and the hardware unify to realize the reference signal production, and according to the reference signal to carry on the calibration to the clock rate, thus achieves to the random event triggering synchronized sampling. According to the test, this kind of synchronous mode＇s synchronization error is the subtle level, and can be widely used in aviation navigation and so on.

关 键 词：时间统一 基准信号 时钟频率校准 同步采样 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]