High-precision time display system based on GPS and BD satellite time service

The utility model discloses a high-precision time display system based on GPS and BD satellite time service. The high-precision time display system comprises a satellite signal receiving circuit, a power supply circuit, a temperature and humidity acquisition circuit, a power-down protection circuit, a self-time-keeping circuit, a serial port debugging circuit, an LED display circuit and an STM32 processor. According to the system, a high-precision signal acquisition chip is adopted to acquire a signal sent by a satellite, time information in the signal is converted into current time zone time,a large-size LED nixie tube is used for displaying, and the purpose of displaying high-precision time is achieved. According to the system, a system time self-time-keeping circuit is designed, so that the time display can still ensure the precision under the condition of satellite data loss. The utility model aims to solve the problem of time synchronization and the problem that the time serviceonly can be based on GPS s