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 3.826 μs，均方差为3.286 μs，且4跳平均监听误差分别为8.193 μs、5.241 μs。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。

中图分类号：TN925；TP212.9
文献标志码：A
DOI: 10.16157/j.issn.0258-7998.223281
中文引用格式： 胡丹，张清华. 石英挠性加速度计时间同步无线测试系统[J]. 电子技术应用，2023，49(7)：105-109.
英文引用格式： Hu Dan，Zhang Qinghua. Time synchronization testing system for quartz flexible accelerometer[J]. Application of Electronic Technique，2023，49(7)：105-109.

Time synchronization testing system for quartz flexible accelerometer

Abstract： 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 3.826 μs, the mean square error is 3.286 μs, and the average monitoring errors of the four hops are 8.193 μs and 5.241 μs, respectively. The system can meet the synchronous test requirements of the quartz flexible accelerometer parameter modeling application, and can be extended to similar applications.

Key words : synchronization testing；time stamp；clock skew；monitoring