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Underground sensing equipment time synchronization method based on time sensitive network

A time-synchronized and time-sensitive technology, applied in transmission systems, time-division multiplexing systems, electrical components, etc., to improve security and recovery capabilities, reduce delays, and improve utilization efficiency

Inactive Publication Date: 2020-09-18
ANHUI UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

This method effectively solves the problem of global time synchronization of underground sensing equipment, and improves its synchronization accuracy and stability on the premise of ensuring the effective use of network resources.

Method used

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  • Underground sensing equipment time synchronization method based on time sensitive network
  • Underground sensing equipment time synchronization method based on time sensitive network
  • Underground sensing equipment time synchronization method based on time sensitive network

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Experimental program
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Embodiment Construction

[0022] Such as figure 1 As shown, the process of time synchronization method for downhole sensing equipment based on time-sensitive network is:

[0023] Step 1: Initialize the global network. Each network communication node in the mine sets its own clock role according to the network structure. The boundary clock communicates as a terminal sensor device; the boundary clock acts as a forwarding routing device; the core clock acts as a forwarding and aggregation switch for the core switch The role of connected regional clock information;

[0024] Step 2: Each node periodically sends the Announce data frame containing the clock information vector table to the neighbor node, calculates and compares the best master clock in the whole network according to the best master clock algorithm, and the core clock device records and sorts the clock performance in the area on the port , call the election of a new master clock under special circumstances to reduce the number of information t...

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Abstract

The invention discloses an underground sensing equipment time synchronization method based on a time sensitive network. According to the method, a frequency drift factor is introduced on the basis ofan original PTP algorithm, and a Kalman filtering algorithm is applied to optimize the frequency drift factor; the most accurate clock in the sensor network is selected as a clock basis for global time synchronization through an optimal master clock algorithm, and a network topology structure is established; global hierarchical traversal is realized, and accurate clock synchronization among all nodes in the industrial wireless sensor network is realized through an accurate time synchronization algorithm based on Kalman filtering and a period balance mechanism. According to the method, the problem of global time synchronization of the underground sensing equipment is effectively solved, and the network synchronization precision and stability are improved.

Description

technical field [0001] The invention relates to the field of sensor network time synchronization, in particular to a method for time synchronization of downhole sensing equipment based on a time-sensitive network. Background technique [0002] With the rapid development of Ethernet, real-time Ethernet is needed in the field of coal mine information interaction to meet the real-time and high-precision synchronization of data transmission. With the development trend of IP in the whole network, the packet transport network (PTN, PacketTransport Network) based on packet services has gradually replaced the traditional time-division multiplexing (TDM, Time-division multiplexing) network, improving the time synchronization of time-sensitive data in the network Reliability is the key to the coordination of underground sensing equipment and coal mine networks, and it is also a prerequisite for technologies such as positioning and data fusion. Currently, the most widely used time syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L29/08
CPCH04J3/0638H04J3/0661H04L67/12
Inventor 宋昊明黄友锐徐善永韩涛张超
Owner ANHUI UNIV OF SCI & TECH
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