Wired seismograph time synchronization system and method based on WR protocol

Abstract

The invention relates to a wired seismograph time synchronization system and method based on a WR protocol. The system comprises a seismograph, a cross station and a host; the host is a WR main clock,receives an external clock reference source and performs time synchronization by taking the external clock reference source as a time reference; the cross station is a WR switch, time synchronizationis carried out by taking the host as a reference point, the seismograph is a WR node, time synchronization is carried out by taking the cross station as a reference time point, and the secondary seismograph takes the clock of the previous seismograph as a reference. Time synchronization in the WR technology comprises two layers of meanings, the clock source frequency is published through the synchronous Ethernet technology, clocks of all nodes in the network are made to run at the same frequency, and sub-nanosecond time synchronization is achieved through combination of the PTP technology andthe DDMTD technology. The WR clock synchronization technology is a new distributed clock synchronization scheme provided by CERN and GSI based on the synchronous Ethernet, a precision timing protocol, an all-digital double-mixing phase discriminator and other technologies so as to realize high clock synchronization precision of master and slave nodes in a large range.

Description

technical field [0001] The invention belongs to the technical field of urban underground space detection, in particular to an anti-interference and high-precision shallow three-dimensional seismograph time synchronization system and method, in particular to a wired seismograph time synchronization system and method based on the WR protocol. Background technique [0002] At present, the synchronization technologies widely used in seismograph applications mainly include: GPS, NTP, IEEE 1588, and the above technologies have been widely used in telecommunications, power systems, transportation, finance and other fields related to national defense construction and national economy. At the same time, emerging synchronization technologies such as White Rabbit (WR for short) and the SAE AS6802 protocol have also developed rapidly. SAEAS6802 defines a high-precision and fault-tolerant synchronization technology, which can establish and maintain a low-latency, low-jitter, high-precisi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a time synchronization system and method for an anti-interference and high-precision shallow three-dimensional wired seismograph based on the WR protocol, so as to overcome the clock drift and communication delay between nodes during long-term and efficient continuous acquisition of the seismic exploration system. disadvantages, and avoids the use of synchronization messages and additional communication links

Images