Wuhan Jianghan Guanta Clock is connected to the Beidou navigation system

According to the Jianghanguan Museum, a few days ago, the Jianghanguan Museum upgraded the functions of the electronic tower clock system and introduced the Beidou timing unit to ensure that the tower clock travels accurately.

Jianghanguan Tower Clock is not only the memory of the Wuhan people but also a national first-class cultural relic. It was built in 1924. In order to reduce the wear and tear of the large bell caused by long-term operation and realize the protection of the tower clock cultural relics, Jianghanguan Museum At the time of preparation, the electronic tower clock system was adopted, and GPS was used for positioning and timing. The update of the tower clock system not only improved the overall function of the system but also replaced the domestic Beidou satellite navigation system, successfully applying the power of great power to the system. Document preservation work.

The Beidou satellite system is the third mature global satellite navigation system independently developed by my country after the US GPS and Russia's GLONASS. On July 31, 2020, the Beidou-3 global satellite navigation system was officially launched. The global positioning accuracy of Beidou-3 is better than 10 meters, the speed measurement accuracy is better than 0.2 m/s, the timing accuracy is better than 20 nanoseconds, and the service availability is better than 99%. At present, a total of 45 Beidou satellites are in orbit to provide services. my country's space and ground infrastructure have relatively complete service capabilities, and the Beidou industrial application system has basically been formed.

The new tower clock system consists of a Beidou timing unit, tower clock control system, tower clock drive system, lighting control system, state acquisition system, monitoring host, and so on.

The Beidou timing unit receives the Beidou satellite signal in real time, decodes it, and provides the system with standard time as the top time source of the entire system. After the tower clock control system receives the time source, it uses the AMR single-chip satellite computer technology to control the travel time and timekeeping to ensure that The travel time is accurate and reliable, and the travel time signal is sent to the tower clock drive system, and the drive system drives the sub clock to travel after receiving it.

The state acquisition system detects the operating state of the control system and the state parameters such as voltage, current, temperature and humidity of each control signal, and the monitoring host is connected to the network monitoring system, with centralized maintenance and self-diagnosis functions, to manage system performance, faults, and safety. All components work closely together to ensure the precise operation of the tower clock.

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