High-precision modular time synchronization equipment

Abstract

The invention discloses high-precision modular time synchronization equipment. The equipment is based on the IRIG-B communication protocol and the PTP communication protocol, and comprises a self-frequency source, time source processing modules, a signal input interface, a signal output interface, and plug-in boards. The equipment provided by the invention has the advantages that the equipment canbe configured through a Web interface, and configuration options comprise external source input setting, local clock source output setting, system setting, relevant PTP and NTP port setting, etc.; mutual redundancy among a satellite signal time source, a B code time source, a 1PPS+TOD time source and the self-punctuality frequency source can be achieved; and two-clock redundancy can be achieved,signal synchronization is carried out between a redundancy main clock and an external GPS / BD satellite or external same-source B codes in a real-time manner, redundancy time signals are input for themain clock through 1PPS+TOD, and synchronization with 1PPS+TOD signals output by the redundancy main clock is carried out through switching when the main clock finds that both input GPS / BD signals andinput B codes are abnormal.

Description

technical field [0001] The invention relates to a time synchronization device, in particular to a high-precision modular time synchronization device. Background technique [0002] For large-scale distributed application systems, the system functions are usually processed by multiple distributed nodes in a hierarchical manner. Each node performs preliminary sampling and processing of information, and then aggregates it through a complex data transmission network, and then performs centralized processing by the background server. . Therefore, information needs to be transmitted frequently in the network during the process of transmission and processing. For some applications that require timeliness of information, it is necessary to use some mechanism to strictly synchronize the time information of nodes. Moreover, as the development trend of information systems gradually changes from "platform centralization" to "network centralization", distributed application systems have ...

AI Technical Summary

Problems solved by technology

[0008] In China, the current commercial applications have followed the development of foreign countries and applied PTP technology; the defense industry mostly uses B-code synchronization, and NTP and PTP are still in the initial stage of application, and there are currently no application cases for fully independent solutions

[0009] In addition, the precise time synchronization system based on the PTP protocol is mainly composed of the main clock and the cluster end equipment, and its time stamp processing is located in the physical layer, which leads to the deployment of the PTP time synchronization network requires certain hardware upgrades

In the existing PTP time synchronization scheme, the master clock supports fewer output signal formats, resulting in low scalability of timing scale

In addition, the existing time synchronization system generally adopts a single-type redundancy scheme (such as dual-channel power supply redundancy), the system reliability is generally not high, there are certain hidden dangers, and it may even cause the failure of the time synchronization system or timing errors, resulting in incalculable loss