Chaotic visible laser-based optical fiber fault positioning device and positioning method thereof

An optical fiber fault and locating device technology, which is applied to measurement devices, electromagnetic wave re-radiation, electromagnetic wave transmission systems, etc., can solve the problem of difficulty in determining the location of the fault point, and achieve the effect of simplifying the measuring device, simple implementation process, and simple device structure.

Active Publication Date: 2012-10-17
TAIYUAN UNIV OF TECH
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AI-Extracted Technical Summary

Problems solved by technology

[0003] Based on the above prior art, the present invention solves the problem that the location of the fault point is difficult to determine due to the discrepancy between the length measurement and location cau...
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Abstract

The invention discloses a chaotic visible laser-based optical fiber fault positioning device and a positioning method thereof. The positioning device comprises a chaotic visible laser emitting device, an optical fiber coupler, an optical circulator, a photoelectric detector, an A/D (Analog/Digital) converter, a signal processing device and a display device. Chaotic visible laser signals emitted by the chaotic visible laser emitting device generate obvious visible bright spots at a fault point (11) of an optical fiber line to be tested (4) due to transmission, and the accurate positioning of the fault point can be realized by finding the visible bright spots in a range of the distance between a detection point and the fault point (11). According to the positioning device and the positioning method, the chaotic visible laser is used as a detection light source, and a chaos-related fault point detection technology and a visible optical fiber fault point detection technology are integrated, so that the fast and accurate detection and positioning of the optical fiber fault point is realized, and the problem that the optical fiber fault point is easily measured and not easily positioned is solved.

Application Domain

Technology Topic

Visible laserPhotovoltaic detectors +6

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  • Chaotic visible laser-based optical fiber fault positioning device and positioning method thereof
  • Chaotic visible laser-based optical fiber fault positioning device and positioning method thereof
  • Chaotic visible laser-based optical fiber fault positioning device and positioning method thereof

Examples

  • Experimental program(1)

Example Embodiment

[0024] Example 2
[0025] Implementation of the present invention is a method for locating the optical fiber fault locating device based on chaotic visible laser in embodiment 1: the chaotic visible light signal is divided into the detection signal I and the reference signal II through the optical fiber coupler 2, and the reference signal is reflected by the optical fiber fault point 11. The latter echo signal enters the signal processing device 9 for cross-correlation processing. The principle of cross-correlation processing to measure the propagation time of light in the optical fiber is: suppose that the chaotic laser generated by the chaotic visible laser generator conforms to the characteristics of the non-periodic function f(t) , The chaotic light I and the chaotic light II divided by the fiber coupler conform to the characteristics of the functions k*f(t) and (1-k)f(t) respectively. The chaotic light I as the probe light is reflected by the fiber fault point The light satisfies the function relation k*f(t-τ 0 ), when the two signals are processed separately to obtain a digital signal and enter the signal processing device 9, the mathematical expression for cross-correlation processing is: F ( τ ) = ∫ - ∞ + ∞ k ( 1 - k ) f ( t - τ ) f ( t - τ 0 ) dt , When τ=τ 0 When the function has a peak value, the propagation time t of the light in the fiber to be tested is obtained, and the distance of the light propagating in the fiber to be tested is calculated by the formula L=V*t/2, that is, the length of the fiber between the fault point 11 and the detection point L , So as to obtain the maximum distance range of the optical fiber failure point, and output through the display 10. Reusing the visible characteristics of the chaotic visible laser will produce obvious visible bright spots due to transmission at the fault point 11, which is the actual location of the fault point, so only the visible bright spot needs to be found within the maximum distance of the fiber fault point. Achieve accurate positioning of the point of failure. Combining chaos-related fault point detection technology and visible light fiber fault point detection technology, firstly realize a rough measurement of the location range of the fiber fault point, and then complete the accurate location of the fiber fault point within the measurement range to realize the fiber fault point Fast and accurate positioning of the location.
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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

  • Simple device structure
  • Simple measuring device
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