A precise time synchronization method and system applied to a cable distance measuring device

A distance measuring device and precise technology, applied in the field of accurate time synchronization method and system of cable distance measuring device, can solve the problems of poor reliability, large environmental impact, low time synchronization accuracy, etc. high precision

Active Publication Date: 2022-01-25
云南电网有限责任公司迪庆供电局
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Problems solved by technology

[0004] The invention provides an accurate time synchronization method and system applied to a cable distance measuring device to solve the problems in the prior art that the network time synchronization method is greatly affected by the environment, has poor reliability and low time synchronization accuracy

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  • A precise time synchronization method and system applied to a cable distance measuring device
  • A precise time synchronization method and system applied to a cable distance measuring device
  • A precise time synchronization method and system applied to a cable distance measuring device

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Embodiment

[0089] The linear optical fiber timing network that adopts seven devices to form is described in detail as follows for the method of the present invention:

[0090] see image 3 , which is a structural diagram of a linear optical fiber time synchronization network composed of seven devices connected end-to-end with optical fibers. First, after each device in the figure is powered on, it will periodically send boundary query messages to two ports, and receive All the devices receiving the boundary query message will reply a boundary query response message, but the devices 1 and 7 in the figure will only receive one boundary query response message, so it can be determined that device 1 and device 7 are located at the beginning and end respectively. of two devices.

[0091] Secondly, both the first and last devices will send the master device declaration message, and the one sent first is the master device. In this embodiment, it is assumed that device 1 is the master device, an...

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Abstract

The invention provides an accurate time synchronization method and system applied to a cable distance measuring device, including determining the head and tail devices in the time synchronization network; determining the master device in the time synchronization network; numbering a number of slave devices in the time synchronization network, Complete the detection of the time synchronization network form; the master device performs automatic time synchronization on several slave devices in turn; if the slave devices can receive the time synchronization initiation message sent by the master device, stop boundary detection and complete the automatic time synchronization process; if some If the slave device exceeds the set time and still cannot receive the time synchronization initiation message sent by the master device, it will activate the boundary detection again to realize the dynamic maintenance of the network. The present invention operates a clock synchronization algorithm on the basis of the existing communication network to synchronize the time of devices in the network, and the time synchronization accuracy can reach nanosecond level; each device is connected by optical fiber, so that the time synchronization communication channel is not affected by environmental factors, and at the same time The dynamic network monitoring algorithm is used to ensure the reliability and stability of the network to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of network system time synchronization, in particular to an accurate time synchronization method and system applied to a cable distance measuring device. Background technique [0002] With the sustained and rapid economic development, the era of digitalization and networking in all walks of life has arrived. Processors and network devices provide a better platform for data exchange, analysis and application between control information systems, but at the same time, higher requirements are placed on the accuracy of time stamps of various real-time data and historical data in the system , however, the network devices in the system all run at their own time. Therefore, the time of the entire system will be seriously confused after a long time, resulting in the failure of normal data statistics and analysis services. This requires the time of the network devices in the entire system Unite. [0003] In the prio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00
CPCH04Q11/0062H04Q2011/0081
Inventor 黄天喜李斌刘武能罗长兵伍浚源吴劲松吴鹤松吴万军刘林札西潘贵生杨红军张磊李何仙和继舜木杰
Owner 云南电网有限责任公司迪庆供电局
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