Time-keeping and timing precision test device, time-keeping precision test method and timing precision test method based on satellite timing system

Abstract

The invention belongs to the field of a photoelectric test and relates to a time-keeping and timing precision test device, time-keeping precision test method and timing precision test method based on the satellite timing system. The device comprises a receiving antenna, a satellite signal receiver, an interface unit, a B code demodulation unit, a master control unit, a sequential machine and delay PLL unit, a computer and a temperature compensation crystal oscillator. The time-keeping precision and timing precision are calculated in a mode of recording arrival time of a to-be-tested signal, and the time-keeping and timing precision test device, the time-keeping precision test method and the timing precision test method based on the GPS / Beidou system are simple in test process and easy in engineering realization.

Description

technical field [0001] The invention belongs to the field of photoelectric testing, and relates to a timekeeping and timing accuracy testing device and method based on a satellite navigation system. Background technique [0002] Time synchronization is to align the clocks in different places, take one of them as the standard time, and adjust the other clock to the standard time, so as to achieve clock synchronization. With the development of science and technology, high-precision time synchronization is widely used in various industries. At present, there are mainly four kinds of satellite timing systems, namely the GPS system of the United States, the Beidou system of China, the GLONASS system of Russia and the Galileo system of Europe. In my country, the GPS system and the Beidou system are widely used. [0003] According to the composition of the clock synchronization signal, there are two different synchronization implementation methods, one is the serial / parallel sync...

AI Technical Summary

Problems solved by technology

[0007] (1) The penetration rate of Type IV B-code interface terminals is low in actual use, and the test conditions are not easy to meet;

[0008] (2) For equipment without standard second pulse output, there is no effective measurement method;

[0009] (3) This test method can only measure devices with pulse synchronization output, and cannot test serial / parallel synchronization

Images