用GPS技术实现试验数据同步采集

GPS Synchronous Clock Solution for Data Acquisition in Tests

根据有关试验方法,武器系统的数据采集设备和基地的真值测量设备要完成数据同步采集工作。以GPS系统实时时钟为基础,通过对绝对时标加以处理,以无线方式实现了不同站点之间的实时数据采集。通过在数据采集计算机内设置高分辨率的实时时钟,以及用实时操作系统替代传统的同步控制装置,将高精度计时信息叠加到所采集的数据中。GPS同步时标技术的原理是,利用GPS秒脉冲和绝对时标,定时对同步控制系统进行校准,对数据采集计算机外部事件发生时刻进行标准时间读数标注,从而保证同步控制系统的时间精度。试验表明:该技术测试系统性价比高、配置灵活,具有较好的推广使用价值。

Data acquisition equipments of weapon system and true value measuring equipments of the base would perform data synchronous acquisition work according to relevant test methods. Based on real time clock of GPS system, and by means of absolute time-marker, real time data acquisition between different sites was performed in the form of wireless. By means of setting up a real time clock with high resolution in the computer of data acquisition, and using real time operational system in place of traditional synchronous control device, timing information with high accuracy was added into acquisition data. The principle of GPS synchronous time-marker technology is to carry out timing calibration of synchronous control sys- tem, to record standard time of external events of data acquisition computer by means of GPS second pulse and absolute time-markers, so as to assure time accuracy of synchronous control system. Tests showed that the solution has high effectiveness-cost, flexible performances, and wide application value.