Low-power high-precision time service system

Abstract

The invention discloses a low-power high-precision time service system. The system comprises a satellite receiver, a control module and a crystal oscillator, wherein the control module is connected with the satellite receiver and the crystal oscillator, the satellite receiver is used for receiving 1PPS signals in satellite signals and sending the received 1PPS signals to the control module through a serial port, the control module determines effectiveness of the 1PPS signals, the crystal oscillator is used for outputting frequency signals to the control module, the control module comprises a digital phase-locked loop circuit and a crystal oscillator frequency reference circuit, the digital phase-locked loop circuit is used for enabling output 1PPS signals to maintain consistent with input 1PPS signals and eliminating accumulative errors generated by the crystal oscillator, and the crystal oscillator frequency reference circuit is used for eliminating jittering errors generated by the satellite receiver by performing data processing on the received 1PPS signals by taking crystal oscillator frequency signals as a reference so as to output high-precision 1PPS signals with neither the accumulative errors nor the jittering errors. According to the invention, the work efficiency is improved, and user networking is facilitated.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a time service system with low power consumption and high precision. Background technique [0002] Military systems, financial systems, telecommunications systems, and power systems all need to synchronize time and frequency and output high-precision frequencies during operation. The development of time and frequency standards is of great significance to the country's economy, science and technology, society, and national defense security. . At present, the timing synchronization approach of the time-frequency standard is developing from short-wave, long-wave, television and other technical means to navigation satellites. The main principle of using navigation satellites for timing synchronization is to receive satellite signals through the navigation satellite signal receiving module, and realize system timing and network clock synchronization according to the 1PPS...

AI Technical Summary

Problems solved by technology

Existing products solve the above problems in the following situations. When the product runs for a period of time, manual adjustments or replacement of equipment occurs when the deviation is large. In fact, these reasons are caused by the drift of the frequency of the crystal oscillator, the component of the product. of

Images