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Accurate distance measurement method based on communication message

A technology of communication messages and messages, which is applied in the direction of measuring devices, radio wave measuring systems, instruments, etc., can solve problems such as unmentioned and unacceptable, and achieve the effect of accurate physical topology characteristics

Pending Publication Date: 2022-04-26
江苏芯云电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In principle, the local clock (LT, Local Time) of each site should be time-synchronized with NTB; but in practice, there must be more or less clock frequency deviation between the two sites, which will lead to There must be an absolute time deviation, which is proportional to the time difference between the current time and the last network time synchronization. That is to say, the longer the time since the last network time synchronization, the greater the difference between LT and NTB.
According to the requirements of network communication for NTB accuracy, a time difference of tens of microseconds is allowed, but for ranging, this difference is even more unacceptable, and this key point is not mentioned in the existing technical solutions

Method used

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  • Accurate distance measurement method based on communication message
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  • Accurate distance measurement method based on communication message

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Embodiment Construction

[0030] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings.

[0031] figure 1 It is a flowchart of the method described in this application, such as figure 1As shown, the method includes:

[0032] S1: Site A sends a ranging request message to site B, and the ranging request message includes the time LT when the physical frame appears on the power line A1 .

[0033] S2: Site B is at local time LT B2 The ranging request message is received at all times, if the LT B2 The theoretical time of T0 is expressed as T0, and the synchronization deviation value of station B receiving the ranging request message is T_Bso, then LT B2 =T0+T_Bso; where, T0=LT A1 +T preamble1 +Tt1,T preamble1 Indicates the time interval from the moment when station B receives the ranging request message to the time when the synchronization is confirmed, and Tt1 indicates the transmission time of the ranging request message. ...

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Abstract

The invention discloses a precise distance measurement method based on a communication message, relates to the technical field of power line carrier communication, and solves the technical problem of inaccurate distance measurement between two devices caused by insufficient synchronization precision and time precision of power line carrier communication. Calculating a linear phase existing in a channel estimation value to speculate a real synchronization moment; and on the other hand, the time precision specified by the existing standard is improved, and in the message transmission process, a timestamp with higher precision is carried so as to obtain higher measurement precision.

Description

technical field [0001] The present application relates to the technical field of power line carrier communication, and in particular to a method for precise ranging based on communication messages. Background technique [0002] The physical connection topological relationship of the low-voltage station area of ​​the power line network is the basis of professional management such as power distribution operation, emergency repair, marketing, and measurement, and reflects the connection relationship and route information of the entire laying line and equipment. In recent years, with the development of energy transformation and power market reform, the requirements for lean management of distribution network have been increasingly strengthened, and low-voltage station area is an important part of smart distribution network. However, for a long time, due to the lag of equipment information maintenance and user file management in the low-voltage station area, a series of problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/02
CPCG01S11/02
Inventor 程晨汤闻誉黄艳川邹其军汤颢
Owner 江苏芯云电子科技有限公司
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