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A method and device for simple detection and positioning of optical fiber internal loss/reflection point

A technology of internal loss and positioning method, applied in the field of signal processing, which can solve the problems of high resource consumption, complex algorithm, long processing time, etc.

Active Publication Date: 2016-09-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, both Gabor transform and wavelet transform have disadvantages such as complex algorithm, high resource occupation and long processing time. In addition, signal processing algorithms based on Gabor transform and wavelet transform often need to use a dedicated digital signal processor, which increases the development time. Difficulty and cost of the system

Method used

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  • A method and device for simple detection and positioning of optical fiber internal loss/reflection point
  • A method and device for simple detection and positioning of optical fiber internal loss/reflection point
  • A method and device for simple detection and positioning of optical fiber internal loss/reflection point

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Experimental program
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Effect test

Embodiment 1

[0067] A simple method for detecting and locating optical fiber internal loss / reflection points. Synchronous signal generation module 1 sequentially and continuously generates Q trigger signals to light source driving module 2 and analog-to-digital converter 5, and the value of Q is 2 0 ,2 1 ,2 2 ,...,2 a , a is a positive integer less than 20, and the time interval between the rising edges of two adjacent trigger signals is T.

[0068] After receiving the trigger signal, the light source driving module 2 generates an electric pulse signal with a width of τ, and the phase of the rising edge of the electric pulse signal is the same as that of the rising edge of the trigger signal, and then sends the electric pulse signal output to the light source 3, and the light source 3 generates an optical pulse signal with a width τ, the phase of the rising edge of the optical pulse signal is the same as the phase of the rising edge of the electrical pulse signal, and τ satisfies 0.1μs≤τ...

Embodiment 2

[0089] A simple detection and positioning device for loss / reflection points inside an optical fiber, comprising: a synchronous signal generating module 1 , a photodetector 4 and a clock signal generating module 9 .

[0090] The output interface of the synchronous signal generating module 1 is connected with the light source driving module 2 and the analog-to-digital converter 5, and is connected with the control interface of the light source driving module 2 and the control interface of the analog-to-digital converter 5 respectively. connected, the output interface of the light source driving module 2 is connected to the light source 3 and the point-by-point differential module 7, and is connected to the control interface of the light source 3 and the control interface of the point-by-point differential module 7 respectively;

[0091] The output interface of the photodetector 4 is connected to the analog-to-digital converter 5, and is connected to the data input interface of th...

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Abstract

The invention provides an optical fiber internal loss / reflection point simple detection and positioning method and device. The device comprises a synchronous signal generating module, a photoelectric detector and a clock signal generating module. An output interface of the synchronous signal generating module is connected with a control interface of a light source drive module and a control interface of an analog-digital converter. An output interface of the light source drive module is connected with a control interface of a light source and a control interface of a dot interlace difference module. An output interface of the photoelectric detector is sequentially connected with the analog-digital converter, an average noise reduction module, the dot interlace difference module and an extreme value judgment and positioning module. A clock output interface of the clock signal generating module is connected to a clock input interface of the analog-digital converter, a clock input interface of the average noise reduction module, a clock input interface of the dot interlace difference module and a clock input interface of the extreme value judgment and positioning module respectively. An output interface of the extreme value judgment and positioning module is used as a data output interface of the entire device, an output interface of the light source is used as a light output interface of the entire device, and an input interface of the photoelectric detector is used as a light input interface of the entire device.

Description

technical field [0001] The invention relates to a method and device for simple detection and positioning of optical fiber internal loss / reflection points, and relates to the technical field of optical fiber measurement and the field of signal processing. Background technique [0002] Optical fiber has been widely used in the field of communication and sensing due to its advantages of large communication capacity, high quality of transmitted information, long transmission distance, stable performance, anti-electromagnetic interference, strong corrosion resistance, and sensitivity to physical quantities such as vibration and temperature. In recent years, with people's continuous demand for bandwidth services, optical network technology has been vigorously developed. But at the same time, the maintenance and management of optical fiber has become more and more prominent. With the increase of the number of optical fibers on the network and the aging of early laid optical fibers,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/00
Inventor 孙小菡叶红亮潘超李明铭赵澍慧
Owner SOUTHEAST UNIV