一种简易通用的敲击触发式惯性导航系统时间同步装置设计

A Universal INS Time Synchronization Solution Based on Punch Triggering

科学研究与工程实践中常需要利用多种传感器协同工作获取被测目标的动态信息,此时对不同传感器采集的数据进行时间同步是必要前提。提出了一种以"敲击-脉冲"信号为媒介的时间同步方案,通过能够在敲击瞬间产生脉冲信号的时间同步装置实现惯性导航系统等运动传感器与其他脉冲同步传感器的时间同步,并通过实验验证了其可行性和时间同步精度。与传统的硬件方案或软件方案时间同步技术相比,本方案通用性极强,开发工作量小,操作简单方便,适用于对时间同步精度要求不高的传感器或系统的快速试验评估。

Scientific researches and engineering applications usually require integrating the kinetic information of the same research object from different kinds of sensors. Synchronization of these data is the prerequisite of the integration. A synchronization solution using a kind of ＂ punch-pulse＂ signal to link different sensors is presented. A special device（ a hammer） is designed which can generate electrical pulse when it punches the motion sensors. The generated pulse will trigger other devices that need to be synchronized with INS,while the punch will be captured by INS. Then the data from INS and other devices will be time aligned. Experiments were conducted to evaluate the feasibility and the synchronization accuracy of this solution. Compared to the traditional synchronization solutions,the proposed solution is easier to operate,requires much less workload of development,and has much more generality for different applications. It can be used in quick evaluations of sensors and systems that do not require high synchronization accuracy,and test the data logging continuity,reliability and clock stability of INS.