Time synchronization method for real-time dynamic tracking

A real-time dynamic, time-based technology, applied in time-division multiplexing systems, electrical components, multiplexing communications, etc., to solve problems such as time system errors becoming larger and communication channels unable to transmit business data.

Active Publication Date: 2020-11-27
SHIJIAZHUANG KE ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the deviation of the crystal oscillator itself, the error of the time system of the device will gradually increase over time. If this problem is solved by frequent time synchronization, the communication channel will not be able to transmit business data, and more channels need to be added.

Method used

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Embodiment Construction

[0041] A time synchronization method for real-time dynamic tracking, based on the time synchronization master station and multiple slave devices. The time synchronization master station broadcasts a time synchronization command every T milliseconds. The time synchronization command contains the current timestamp, and the slave device receives the time synchronization command . In this embodiment, T=120 milliseconds.

[0042] see figure 1 , this embodiment is a fault locating device for power distribution products: a transient wave recording type fault indicator. A core function of this product is to record waves for the ABC three-phases at the moment when a fault occurs on the transmission line, and it has a certain effect on the synchronization of the three phases. Requirements, so that the master station can judge the fault after receiving the waveform.

[0043] This product requires that the three-phase fault synchronization error of the waveform recorded at the time of ...

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Abstract

The invention discloses a time synchronization method for real-time dynamic tracking, belongs to the field of computer application, and relates to a synchronization method of sampling data, in particular to a time synchronization method for real-time dynamic tracking between master equipment and slave equipment, which is applied to a transient wave recording type fault indicator. The time synchronization master station broadcasts a time synchronization command every T milliseconds, the time synchronization command comprises a current timestamp, the slave equipment receives the time synchronization command, the difference between the current timestamp and the slave equipment is calculated according to the interval between the continuously received timestamps and the local time interval, andthe count value in the local timer is adjusted according to the difference, so that the purpose of real-time dynamic tracking time synchronization is achieved. By adopting the scheme provided by theinvention, the timestamp in the received time synchronization command is used as a reference, the oscillation count of the crystal oscillator within a certain period of time is adjusted, the synchronization of the local clock and the host is finely adjusted, the clock synchronization of a plurality of slave devices is realized, and the time difference between the slave devices is within +/-2 microseconds.

Description

technical field [0001] The invention belongs to the field of computer applications, and relates to a synchronization method for sampling data, in particular to a time synchronization method for real-time dynamic tracking between master and slave equipment. Background technique [0002] With the continuous development of science, technology and economy, whether it is enterprises or people's life, the demand for electricity has been further improved, and the State Grid Corporation has taken the power outage time as the assessment standard. In order to reduce the power outage time and quickly find the source of the fault, State Grid Corporation of China has widely used the fault indicator of transient state recording type. Its main feature is to record the three-phase waveform at the time of line failure and upload it to the master station for further analysis of the fault by the master station. This requires the synchronization of the three-phase waveform to be high, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0667H04J3/0644
Inventor 吴纳磊徐少雄王强翟志国王琳刘海涛贾海旭李英春张春豪胡金路安志国王鹏王志辉辛海斌刘腾飞赵浩
Owner SHIJIAZHUANG KE ELECTRIC
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