Network timing precision control method, system and terminal equipment of seismic collector

Abstract

The present invention is applicable to the technical field of seismic data acquisition, and provides a network timing accuracy control method, system and terminal equipment of a seismic collector, including: using an interrupt mode to transmit data packets; calculating the optimal network delay; according to the optimal network delay After correcting the transmission error in the network timing process, the physical layer of the server receives the data packet, and sends the data from the physical layer of the server to the application layer of the server through the interrupt mode to perform timing for the data packet. This application uses the interrupt mode to transfer data packets between the physical layer and the application layer, and realizes the accurate stamping of data packet time stamps, and because this algorithm adopts a symmetric algorithm mode in both the client and the server, the execution error generated by it may be due to Symmetry is greatly reduced. According to the error caused by the data packet transmission between the client and the server, it is adjusted by calculating the optimal network delay, which greatly reduces the timing error and improves the network timing accuracy.

Description

technical field [0001] The invention relates to the field of seismic data acquisition, in particular to a network timing accuracy control method, system, terminal equipment and computer-readable storage medium of a seismic acquisition device. Background technique [0002] In the field of geophysics, especially in the field of seismic data acquisition, the time information of the seismic data collected by the seismic collector is one of the very important information of the seismic signal. Specific to the seismic data collector, its own time service is also an important indicator One, the time service sources of all seismic data collectors now mainly come from two aspects, one is the time service based on GPS, specifically receiving fixed-format message information from communication interfaces such as serial ports, I2C or SPI, and the other The information contains the specific year, month, day, hour, minute, and second information. In addition, it cooperates with the PPS se...

AI Technical Summary

Problems solved by technology

[0002] In the field of geophysics, especially in the field of seismic data acquisition, the time information of the seismic data collected by the seismic collector is one of the very important information of the seismic signal. Specific to the seismic data collector, its own time service is also an important indicator One, the time service sources of all seismic data collectors now mainly come from two aspects, one is the time service based on GPS, specifically receiving fixed-format message information from communication interfaces such as serial ports, I2C or SPI, and the other The information contains the specific year, month, day, hour, minute, and second information. In addition, it cooperates with the PPS second pulse to realize accurate time service; the other is a time service mechanism based on the network, which is specifically divided into two types, one is NTP based on the general network The network timing protocol, whose timing mechanism works at the network application layer, can realize time synchronization under general network hardware. The disadvantage is that the timing accuracy is low, and its timing accuracy is at the ms level; another network-based time synchronization protocol is PTP network The time service protocol, which works under a specific network link, requires special hardware cooperation to realize network time service. Its advantage is that the time service accuracy is high, and its timing accuracy can be accurate to the subtle level. The disadvantage is that the implementation cost is high, including the necessary hardware cost. and software running costs, and requires special network hardware support, so it is not conducive to implementation under general network hardware conditions

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