基于TDC-GP2的时间间隔测量系统设计

Design of Time Interval Measurement System Based on TDC-GP2

摘要:

精确的时间间隔测量在时间同步系统有着至关重要的作用,为了满足大量程和高精度的需求,介绍了一种直接计数法和时间-数字装换法相结合的时间间隔测量系统；设计中采用两片TDC-GP2时间-数字转换芯片,结合FPGA和上位机,可以实现精度为1 ns时差测量；经过大量的实际测量,系统的分辨率为70 ps,精度为1 ns,最大可以测量1 s的时间间隔；该设计的系统具有可靠性高、功耗低、精度高、使用灵活等优点。

Abstract:

The precise time interval measurement in time synchronization system has a vital role, in order to meet the needs of a large range and high precision, time interval measurement system integrated a direct counting method and the time - digital equipment exchange method. Using two pieces of TDC-GP2 time to digital conversion chip design, the combination of FPGA and host computer, can achieve the accuracy of 1 ns time difference measurement. After a large number of the actual measurement, the resolution of the system is 70ps, the precision is 1 ns, the maximum measurement of 1 s interval. The design of the system has high reliability, low power consumption, high precision, flexible use etc.