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

A network timing and precision control technology, applied in time division multiplexing systems, seismology, seismic signal recording, etc., can solve the problems of high implementation cost, unfavorable implementation, and low timing accuracy, and achieve improved timing accuracy and symmetry The effect of reducing and reducing the timing error

Active Publication Date: 2021-02-19
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

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Embodiment 1

[0054] figure 1 It is a schematic flow chart of the network timing accuracy control method of the seismic collector provided by the embodiment of the present invention, and the method may include the following steps:

[0055] S101: For the data packet received by the client, use the interrupt mode to make the data packet receive the data packet by the application layer of the client, and use the interrupt mode to send the data packet from the application layer of the client to the physical layer of the client .

[0056] S102: When the client sends the data packet to the server, preset a network environment constraint value.

[0057] S103: Continuously detect the GAP value and the DELAY value in the time synchronization process of the network environment constraint value at different times, wherein the GAP value is the clock offset between the client and the server, and the DELAY value is the data packet The time delay in the round trip between the client and the server.

[...

Embodiment 2

[0062] The timing accuracy control method provided by the present application will be described below in conjunction with specific examples; figure 2 Another embodiment of the present invention provides a schematic diagram of a data packet transfer process between the client and the server.

[0063] On the basis of the NTPV0 protocol, the client-server mode of this protocol is adopted, and the communication method is UDP. Unit, in the server section, by default the server has accurate time service at this time, and its time source can come from GPS or other time service units, which will not be discussed here, but for the algorithm restrictions in the server's time service process, part of it needs to have Application layer software limitations are specifically addressed here.

[0064] In addition, other conventional names and common synchronization processes related to the NTP protocol will not be repeated in the present invention.

[0065] For reaching above-mentioned inv...

Embodiment 3

[0077] image 3 It is the network timing accuracy control method of the seismic collector provided by another embodiment of the present invention, which is described in detail as follows:

[0078] For this high-precision network timing algorithm based on real-time data transmission seismic collectors, the client and server are both Cortex-M3 embedded MCUs based on ARM architecture in this example, and the selected model is STM32F2 series of STMicroelectronics. Here, this algorithm does not need to make specific requirements on the MCU model, but only requires that the MCU has a corresponding network physical layer interrupt register, and can configure and respond to this register interrupt. For the operating system used by the client and server, there is no mandatory dependency requirement in this algorithm, but the following two conditions must be met in the operating system: 1. There is a network physical layer interrupt hook function or interface, which can be used in the i...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0667H04J3/0682G01V2200/12G01V1/24H04L7/0016H04W56/004
Inventor 徐锡强郝天珧许晴张妍赵春蕾
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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