High-precision time synchronization system and method in embedded system

A technology of time synchronization system and embedded system, which is applied in the direction of synchronization, changing time indication, clock driven by synchronous motor, etc., which can solve the problems of affecting accuracy and high cost

Active Publication Date: 2017-07-21
上海博达通信科技有限公司
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Problems solved by technology

[0003] In the prior art, for high-precision maintenance time, a common solution is to provide high-frequency and high-precision clocks (to reach 0.05ppm, that is, an error of 50ns per second) for related chips. Time Aging Affects Accuracy

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  • High-precision time synchronization system and method in embedded system
  • High-precision time synchronization system and method in embedded system
  • High-precision time synchronization system and method in embedded system

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[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0030] see figure 1 , which shows the schematic diagram of the composition of the high-precision time synchronization system in this scheme.

[0031] It can be seen from the figure that the high-precision time synchronization system 100 is mainly composed of a high-precision time source module 101 , an auxiliary counter module 102 , and a time synchronization and maintenance module 103 .

[0032] Among them, the high-precision time source module 101 is connected with the auxiliary counter module 102 and the time synchronization and maintenance module 103 data, which regularly obtains the original high-precision time, and notifies the auxiliary counter module 102 to synchronize the time, and simultaneously provides the synchronization time inform...

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Abstract

The invention discloses a high-precision time synchronization system and method in an embedded system. The synchronization system is formed by cooperation of a high-precision time source, an auxiliary counter, and a time synchronization and maintenance module. During time synchronization, firstly, the time of the high-precision time source and the time of the auxiliary counter at the same time are obtained; then the time drift and the time offset of the auxiliary counter are calculated and maintained; and the time of the auxiliary counter is obtained according to the requirement, and the high-precision system time is obtained according to conversion of the time drift and the time offset. Therefore, a high-precision time synchronization scheme is formed, high-precision time maintenance is realized through real-time calculation and correction of clock errors, the stability is high, the cost is low, and problems of poor precision of a clock chip, and easy influence of temperature and aging on the precision are effectively solved.

Description

technical field [0001] The invention relates to software system technology, in particular to time synchronization technology in the software system. Background technique [0002] At present, more and more high-precision time is required on embedded system devices, and the system needs to maintain the time by itself after the time is synchronized. [0003] In the prior art, for high-precision maintenance time, a common solution is to provide high-frequency and high-precision clocks (to reach 0.05ppm, that is, an error of 50ns per second) for related chips. Time aging affects accuracy. [0004] It can be seen that providing a low-cost and high-precision time synchronization solution is an urgent technical problem in the art. Contents of the invention [0005] Aiming at the problems existing in the high-precision time maintenance of existing embedded system equipment, the purpose of the present invention is to provide a low-cost and high-precision time solution. The scheme...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G7/00G04G5/04
CPCG04G5/048G04G7/00
Inventor 汪革王仁雷芶利平李俊盛
Owner 上海博达通信科技有限公司
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