石英挠性加速度计时间同步无线测试系统  

Time synchronization testing system for quartz flexible accelerometer

作　　者：胡丹[1] 张清华 Hu Dan;Zhang Qinghua(China Academy of Engineering Physics,Mianyang 621900,China;Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]中国工程物理研究院,四川绵阳621900 [2]西南科技大学,四川绵阳621010

出　　处：《电子技术应用》2023年第7期105-109,共5页Application of Electronic Technique

摘　　要：针对石英挠性加速度计参数建模时的同步测试需求,基于无线通信技术设计了时间同步无线测试系统。该系统基于CC2530无线SOC芯片设计,采用硬件捕获时间戳的方式降低部分延迟因素,利用最小二乘法(Least Squares Fit,LSF)估计、补偿无线节点间的相对时钟漂移,设计了监听同步方式以减少发送同步信息包的次数。单跳及多跳监听同步测试结果表明,其4跳平均同步误差为3.826μs,均方差为3.286μs,且4跳平均监听误差分别为8.193μs、5.241μs。系统能满足石英挠性加速度计参数建模应用的同步测试要求,并可以推广到类似应用中。In order to meet the synchronous test requirements of quartz flexible accelerometers in parameter modeling system,a time-synchronized wireless test system is designed based on wireless communication technology.The system is designed based on the CC2530 wireless SOC chip.The hardware captures timestamps to reduce some delay factors.Least Squares Fit(LSF)is used to estimate and compensate for the relative clock drift between wireless nodes.The monitoring synchronization method is designed to reduce the number of times sync packets sent.The single-hop and multi-hop monitoring synchronization test results show that the average synchronization error of the four hops is 3.826μs,the mean square error is 3.286μs,and the average monitoring errors of the four hops are 8.193μs and 5.241μs,respectively.The system can meet the synchronous test requirements of the quartz flexible accelerometer parameter modeling application,and can be extended to similar applications.

关 键 词：同步测试 时间戳 时钟漂移 监听 

分 类 号：TN925[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]