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Intelligent optical fiber distributed acoustic wave sensing system based on AI chip and method

A technology of acoustic wave sensing and intelligent optical fiber, applied in neural learning methods, measuring ultrasonic/sonic/infrasonic waves, using wave/particle radiation, etc., can solve problems such as weak signal pattern recognition, and achieve the effect of improving signal-to-noise ratio

Inactive Publication Date: 2019-11-22
SICHUAN GUANGSHENG IOT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the optical fiber distributed acoustic wave sensing (DAS) system in the prior art cannot carry out pattern recognition to the weak signal that it collects, provides a kind of intelligent optical fiber distributed acoustic wave sensing system based on AI chip and method

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  • Intelligent optical fiber distributed acoustic wave sensing system based on AI chip and method
  • Intelligent optical fiber distributed acoustic wave sensing system based on AI chip and method
  • Intelligent optical fiber distributed acoustic wave sensing system based on AI chip and method

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Embodiment 1

[0033] This embodiment provides an intelligent optical fiber distributed acoustic wave sensing system based on an AI chip, such as figure 1 As shown, the system specifically includes a light source, a modulation unit, an amplification unit, a drive unit, an optical fiber sensing unit, a data acquisition unit, a data processing unit, a photoelectric conversion unit and an alarm unit 210 .

[0034] In this embodiment, the data processing unit is specifically an artificial intelligence chip 209, the optical fiber sensing unit includes a circulator 205 and a sensing fiber 206, the circulator 205 is used to ensure the unidirectional transmission direction of the light source, and the signal amplifying unit is specifically an EDFA doped with erbium For the optical fiber amplifier, the modulation unit is specifically the modulator 202 , the driving unit is specifically the signal driver 203 , and the data collection unit is specifically the acquisition card 208 .

[0035] Further, th...

Embodiment 2

[0044] This embodiment has the same inventive concept as Embodiment 1. On the basis of Embodiment 1, a signal classification method of an intelligent optical fiber distributed acoustic wave sensing system based on an AI chip is provided, such as figure 2 As shown, the methods specifically include:

[0045] S01: Establish a signal type database based on known acoustic wave signals, that is, the data processing unit performs learning and training on a large number of known acoustic wave sensing signal data sets input in advance, extracts standard amplitude-frequency feature information of known acoustic wave sensing signals, and A signal type database is established based on the frequency feature information, and the signal type database records the ranges of amplitude-frequency feature values ​​corresponding to various acoustic wave signal types. Wherein, the signal types include but not limited to intrusion signals and natural disaster signals.

[0046] S02: Extract the ampl...

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Abstract

The invention relates to an intelligent optical fiber distributed acoustic wave sensing system based on an AI chip and a method, and belongs to the technical field of distributed optical fiber measurement and distributed optical fiber sensing. The system comprises a light source, a modulation unit, an amplification unit, an optical fiber sensing unit, a data processing unit, a photoelectric conversion unit and an alarm unit, wherein the data processing unit is specifically an artificial intelligence chip; the light source, the modulation unit, the amplification unit and the end a of a circulator are sequentially connected, the end b of the circulator is connected with a sensing optical fiber, the end c of the circulator is connected with the photoelectric conversion unit, the output end ofa detection unit is connected with the data processing unit, and the output end of the data processing unit is connected with the alarm unit; and the data processing unit receives an external acoustic wave signal and extracts amplitude-frequency characteristics of the external acoustic wave signal to identify the type of the external acoustic wave signal. The system can acquire the external acoustic wave signal and identify the type of the signal, and has important application value in the intelligent aspect in the fields such as perimeter security protection, disaster early warning and geological exploration.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber measurement and distributed optical fiber sensing, in particular to an intelligent optical fiber distributed acoustic wave sensing system and method based on an AI chip. Background technique [0002] Optical Distributed Acoustic Sensing (DAS) system has been widely used in oil and gas exploration and other fields. When the external sound field changes, the phase difference between two adjacent points of the detection pulse light along the optical fiber changes, and is proportional to the frequency and amplitude of the external sound field; demodulating the phase difference of the back Rayleigh scattering signal between two adjacent points can be Position and restore the external sound field. High-precision, high-sensitivity DAS technology can be used in perimeter security, disaster early warning, geological exploration and other fields. [0003] However, DAS is a distributed se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
CPCG01H9/004G06N3/08G06N3/045G06F9/3877G06N3/06
Inventor 饶云江韩冰龙鲸凤
Owner SICHUAN GUANGSHENG IOT TECH CO LTD