A bidirectional underwater laser bus for industrial control network

An industrial control network, laser technology, applied in the direction of optical transmission system, etc., can solve the problem of difficult to obtain the second channel

Active Publication Date: 2021-03-16
BEIJING AN GUANG INFO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty is that the data communication of the prior art requires two channels, one for data transmission and one for synchronous clock
But laser communication is inherently a single channel, and it is difficult to obtain a second channel

Method used

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  • A bidirectional underwater laser bus for industrial control network
  • A bidirectional underwater laser bus for industrial control network
  • A bidirectional underwater laser bus for industrial control network

Examples

Experimental program
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Embodiment Construction

[0014] Laser communication is characterized by a one-to-one mode without pre-negotiated short messages, and there is a set of coding schemes applicable to laser lines, which realizes highly reliable laser communication. The key points of the scheme are (a) set it as an 8-bit code line, (b) use 0X7E [0111 1110] as the filling code, and (c) use 5 insertions to transform the message. The high reliability of laser communication means that the bit error rate is better than 10 -13 , and redundant code checking can be used in communication.

[0015] Example of signal width measurement and recording: such as figure 2 . The 16-bit word length, the width of the "0" signal, the width of the "1" signal, ... are arranged in this order. They are 0X040B, 0X0C41, 0X040B, ....

[0016] Example of analyzing padding code: such as figure 1 . Let δ 1 2 , total hysteresis δ=δ 2 -δ 1 . If the sending duration of a single signal word is T, and the receiving duration of n signal words "1" i...

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Abstract

A one-tube bidirectional underwater laser bus patent of an industrial control network takes a laser beam as an information transmission medium of a bus. When the laser is switched on once, the bus exists; when the laser is switched off once, the bus does not exist. It is interesting because it is scientific. In addition, bidirectional communication is not carried out left at first and then right,but is carried out at the same time. And the laser path of the bus is also zigzag. These are permitted to be listened at once, are not well accepted by people, and can still be understood after beingwatched at once. And the tube is a laser bus protection tube, is long, thin and hollow, and has two open ends, and the landscape is formed inside the tube. A one-master multi-slave working mode is introduced in detail to a specific method of connection of the master multi-slave working mode.

Description

Technical field: [0001] The present invention will disclose a method of communication sending and receiving by identifying data by width, referred to as "width method". The reception can be completed without synchronous clock, so the underwater highly reliable laser communication can be realized. And put forward a kind of laser beam confined in a hose with good inner wall reflection as information transmission material, a tube bidirectional type, laser bus technology scheme of industrial control network in water. Further implement the communication in one-to-many situations in the water, hot-swappable underwater communication, one tube, two-way simultaneous communication, working in deep sea exposure water, the optical path can be twisted and meandering for more than several kilometers, preventing fish from blocking, protecting from dirty water blocking, high Bandwidth, one-master-multiple-slave working mode, solutions to meet the needs of different scales and so on. The inv...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04B10/80
Inventor江启航
OwnerBEIJING AN GUANG INFO TECH