GPS time service system

• Main Authors: ZHU WENJI, XU MING, WANG JIYE, ZHANG QI, LI KEWEN, YU XIAOYONG, OU SHIFENG, WU ZHIDING, CHEN DEBO, WU LIFANG, GAO LIKE, WU JIANHAO
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2014
• Subjects: HOROLOGY; PHYSICS; RADIO-CONTROLLED TIME-PIECES

A GPS time service system comprises a GPS antenna, a GPS receiver, a crystal oscillator, a counter, a 1PPS generator, a CPU controller and a time service output module. The GPS antenna is connected with an input end of the GPS receiver. An output end (I) of the GPS receiver is connected to an input end of the counter. An output end (I) of the counter is connected to an input end of the 1PPS generator. Accurate time output is completed by the 1PPS generator through the time service output module. The GPS time service system is not dependent on the time of a satellite signal but refers to the time of the satellite signal, relies on the crystal oscillator to generate a clock signal, compares an 1PPS signal and a reference signal through an edge comparator, continuously modifies and narrows the deviation between the output by the 1PPS and a standard time of a satellite signal, and finally obtains a precise time reference. Meanwhile, a temperature sensor disposed in the system can overcome the temperature's influe