【摘要】 当前大规模分布式测试网络均通过有线连接或无线通讯方式组网,通过同步时钟协议或专用信号线实现时钟同步,文中提出了无通讯链路连接的大型分布式测试网络的同步采样问题,并通过改进RTC的自锁时精度,将GPS同步定位技术和高精度RTC自锁时相结合,解决了无缆遥测地震仪网络的同步采样技术难题。根据误差分析,在双时标同时应用时,野外施工同步精度优于+3.2μs.测试结果表明:该方法达到了无缆遥测地震仪的同步采样要求,通用性强,可广泛应用于同类测控网络。更多还原

【Abstract】 At present,large-scale test network are distributed through cable connections or wireless communication network,the clock synchronization is achieved through clock synchronizing protocol or special synchronized clock signal lines.This paper presented the synchronous acquisition problem in large-scale distributed testing network without communication links.The accuracy of self-locking RTC was improved,combined with which the simultaneous GPS positioning technology was used to solve the problem of synchronous sampling in non-cable telemetry seismograph network.According to the synchronization error analysis,the synchronization accuracy while working in field is better than +3.2 μs.Test result shows that the method can meet the synchronization requirement of non-cable telemetry seismograph.Meanwhile,this method has high universality,it can be widely used in such kind of monitoring and control networks.更多还原