基于时间间隔测量的宽范围高分辨率时间同步检测方法

针对传统时间同步技术中测量范围与分辨率之间的矛盾,提出一种基于时间间隔测量的宽范围高分辨率时间同步检测方法.利用电磁波信号在特定介质中传播的准确性和稳定性,结合任意信号之间无需频率归一化处理的异频相位检测原理,以时空转换关系为基础,将基于长度游标的时频测量技术应用于导航卫星1pps信号的同步检测,进而提高1pps信号之间时间差测量的分辨率.同时,该技术与传统的高精度时间间隔测量方法配合使用,形成多层次逐级测量法,可以进一步扩宽测量范围.实验结果证明了该方法的合理性和科学性,其测量分辨率可达到50ps量级,稳定度优于10ps.该方法将为我国航空航天、导航定位、通信、计量、雷达、天文等高科技领域的进一步发展提供理论指导并对其中关键的时间同步方面提供技术支持.

High-Resolution and Wide-Range Time Synchronization Detection Method Based on Time Interval Measurement

Aiming at the contradictory between measurement range and resolution in the traditional time synchronization technology,a high-resolution time synchronization detection method with wide range is proposed on the basis of time interval measurement.Using the accuracy and stability of electromagnetic wave signal transmission in a specific medium,combining the different frequency phase detection principle without frequency normalization between any signals,and based on the conversion of time and space relations,a time-frequency measurement technique based on length vernier is used in navigation satellite for the synchronization detection of 1pps signal,which improves the resolution of the time difference measurement of 1pps signal.Moreover,the multi-levels measurement method formed by combining the technique and the traditional time interval measurement method with high precision has a wide measurement range in time and frequency measurement field.It was found that the method is reasonable and scientific in our experiment.Experimental results show that the measurement resolution with 50ps can be obtained in this method,and its stability is better than 10ps.The novel method may be ussful for providing the theoretical guidancethe and the key technical support of time synchronization to the chinese high-tech areas,such as aeronautics and astronautics,navigation and positioning,communication,metrologica,radar,astronomy and so on.