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High precision time keeping method and device

A high-precision, time-referenced technology, used in time-division multiplexing systems, electrical components, multiplexing communications, etc., to solve problems such as low punctuality accuracy and achieve high punctuality accuracy.

Inactive Publication Date: 2017-08-08
POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a high-precision timekeeping method and device for the problem of low timekeeping accuracy of existing timekeeping devices after losing the reference time source

Method used

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  • High precision time keeping method and device
  • High precision time keeping method and device

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Embodiment Construction

[0023] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to related drawings and related embodiments. Apparently, the embodiments described below are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0024] figure 1 is a flow diagram of a high-precision time-keeping method in an embodiment, such as figure 1 As shown, the high precision punctuality method in the present embodiment comprises the following steps:

[0025] Step S110, acquiring the signals of each reference time source, and judging the valid...

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Abstract

The invention relates to a high precision time keeping method and a high precision time keeping device. The method comprises the following steps of acquiring each reference time source signal, and judging validity of each reference time source according to each reference time source signal; when all reference time sources are invalid, acquiring a temperature aging prediction model of a local clock crystal oscillator, wherein the temperature aging prediction model is used for recording a corresponding relation between the temperature of the local clock crystal oscillator, the working time of the local clock crystal oscillator and frequency deviation of the local clock crystal oscillator; predicting the frequency deviation of the local clock crystal oscillator according to the temperature of the local clock crystal oscillator and the working time of the local clock crystal oscillator measured currently, and the temperature aging prediction model of the crystal oscillator; and adjusting a local clock according to the frequency deviation of the local clock crystal oscillator. According to the high precision time keeping method and device provided by the invention, the frequency deviation of the local clock crystal oscillator is predicted according to the temperature aging prediction model of the local clock crystal oscillator, the local clock is adjusted according to the frequency deviation, and the time keeping precision is high.

Description

technical field [0001] The invention relates to the field of clock control, in particular to a high-precision timekeeping method and device. Background technique [0002] Accurate and unified time synchronization system is a very important part of modern scientific research, and has been widely used in daily life such as real-time communication system, railway vehicle dispatching, power resource allocation and so on. With the rapid development of automation technology and communication technology, traditional manual equipment has been transformed into intelligence and automation, especially the substation secondary system and its equipment. During the actual operation of intelligent substations, the time synchronization system is the key to maintaining data acquisition and synchronization of intelligent substations. The reliability and punctuality of clocks are extremely important for the stable operation of intelligent substations. [0003] In the actual operation of smart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0635
Inventor 陈浩敏陈波蒋愈勇郭晓斌李鹏王建邦谈赢杰姚浩习伟熊汉杨乐蔡田田李肖博
Owner POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID
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