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Optical cable identification method and optical cable identification device

An identification method and an identification device technology, which are applied to measuring devices, testing optical fiber/optical waveguide equipment, optical instrument testing, etc., can solve the problems of complex optical cable identification devices, high cost, and large noise, and prevent thresholds from not converging and coherent The effect of short time and widening spectrum

Active Publication Date: 2018-05-08
INNO INSTR (CHINA) INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problem of optical cable identification very well, but we found that the optical cable identification device of this method is more complicated, and the cost is higher. When the test distance is long, the noise is large, and it is impossible to distinguish whether it is human disturbance or noise influence.

Method used

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  • Optical cable identification method and optical cable identification device
  • Optical cable identification method and optical cable identification device
  • Optical cable identification method and optical cable identification device

Examples

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Effect test

Embodiment 1

[0055] combine figure 1-2. This embodiment describes in detail the optical cable identification device of the present invention, which includes: a light source 1, a first coupler 2, a second coupler 3, a third coupler 4, a fourth coupler 5 and a detector 6, The light emitted by the light source 1 passes through the first coupler 1 and is divided into two paths, namely the first direction and the second direction. The light in the first direction passes through the second coupler 3 and then returns to the first coupler 2 to reach the light source 1. Among them, it plays the role of widening the spectrum. The widening effect is shown in Figure 2. It can be seen from the figure that the 3dB bandwidth before the spectrum widening is 0.0166nm, and the 3dB bandwidth after the spectrum widening is 0.1005nm. The light in the second direction reaches the third coupler 4 and is divided into two paths. The first direction is connected to the delayed light 8 and then reaches the fourth co...

Embodiment 2

[0058] combine image 3 , this embodiment describes the optical cable identification device of the present invention in detail. The difference between it and Embodiment 1 is that the reflection unit in the first direction of the first coupler 2 is different, and it does not include the second coupler 3, but in the first A reflector 9 is arranged on the end face of the output end of the coupler 2 in the first direction, so that the light from the light source passing through the first coupler 2 in the first direction is all reflected back into the light source 1 .

[0059] In different embodiments, a total reflection film may also be coated on the end surface of the output end of the first coupler 2 in the first direction, and the same effect as that of the reflector 9 may also be achieved.

Embodiment 3

[0061] combine Figure 4 , the present embodiment describes in detail the optical cable identification method of the present invention, which includes the following steps:

[0062] (1) Utilize the optical cable identification device of embodiment 1 or embodiment 2, obtain the signal of the optical cable feedback to be measured by interference method;

[0063] (2) Obtain the initial threshold of the current signal; assuming a set of data (m, m is a positive integer) is Signal(i), first take the absolute value of the signal to obtain AbsSignal(i), using the formula:

[0064] Signal_Threshold(i)=(Signal_Threshold(i-1)*(k-1)+AbsSignal(i)) / k (1)

[0065] Wherein, Signal_Threshold(i) is the initial threshold obtained, i is the serial number of the current signal, 1<i<m, k is a positive integer, (experimental verification, when taking k=8192, noise filtering effect and threshold convergence effect it is good);

[0066] (3) Multiply the preliminary threshold Signal_Threshold(i) of ...

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Abstract

The invention discloses an optical cable identification method and an optical cable identification device. The method comprises: broadening spectra, and acquiring signals fed back by an optical cable to be detected through an interference method; acquiring an initial threshold of a current signal; multiplying the initial threshold by a preset coefficient to obtain a final threshold; comparing the absolute value of the current signal with the final threshold of the current signal; if smaller, setting the current signal value to be zero, otherwise, keeping the current signal value. The device comprises a light source, a coupler, a reflection unit and a detector, wherein the coupler comprises a first coupler and a light path constant unit; light emitted by the light source passes through the first coupler and then is split into two directions, the light in one direction is reflected by the reflection unit, and the light in the other direction sequentially passes through the light path constant unit and the optical cable to be detected and then arrives at the detector. The optical cable identification method and the optical cable identification device broaden spectra, reduce the influence of noise and lower the production cost.

Description

technical field [0001] The invention relates to the field of optical cable identification, in particular to an optical cable identification method and an optical cable identification device. Background technique [0002] With the popularization of the use of optical cables, people need to determine whether the optical cable is damaged. In daily work, due to the long laying route of the optical cable, how to quickly notify the relevant personnel who need to identify the damaged optical cable after the inspector judges the specific damaged optical cable . In the prior art, the optical cable is disturbed, and the disturbed optical cable is judged according to the corresponding interference generated by the light in the optical cable. This method solves the problem of optical cable identification very well, but we found that the optical cable identification device of this method is more complicated, and the cost is higher. When the test distance is long, the noise is large, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/08G01M11/00
CPCG01M11/088G01M11/31
Inventor 李楚元
Owner INNO INSTR (CHINA) INC
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