【摘要】 数字地震仪要求布置在数十平方公里测网中的数万个采集站,在同一时刻启动AD转换,同步开始采集地震数据,其相互之间的时差应小于几十微秒。如何实现这种精确的时间同步是研究数字地震仪的主要任务之一。文章详细讨论了在交叉线方向和测线方向同步控制的方法和原理。更多还原

【Abstract】 Digital seismic recording systems require that thousands of data acquisition stations which scattered over tens of square kilometers to start their AD sample at the same moment.The tolerance only allows around hundred micro seconds.How to realize such precision time synchronism is a main task to develop a seismic recording system.This paper discusses the principle and method of synchronism control on the cross line and survey line.更多还原