US 2022/0103252 A1 · OPTICAL FIBER ROUTE SEARCH METHOD, OPTICAL FIBER ROUTE SEARCH DEVICE AND PROGRAM

Abstract

An object is to provide an optical fiber route search method, an optical fiber route search device, and a program that can efficiently confirm a path of an optical fiber that is installed over a long distance or across a large range. The optical fiber route search method according to the present invention carries out optical measurement that performs distributed measurement of the state of an optical fiber while applying a disturbance to the optical fiber in a portion in which wires of the optical fiber are parallel to each other, branch out, or intersect with each other (a proximity portion), and determines that the position in which the number of singularities (peaks or intensity fluctuations) fluctuates (becomes plural) is the position of the proximity portion from a distribution diagram obtained through the optical measurement.

Claims7

Dependent claims

An optical fiber route search method that confirms a path of one optical fiber that is arranged in a space so as to include at least one proximity portion in which the optical fiber is in proximity to itself,

the optical fiber route search method comprising:
performing optical measurement of inputting test light to the optical fiber while applying a disturbance to an arbitrary section of the optical fiber, and obtaining a distribution of response light of the test light in a length direction of the optical fiber;
performing a singularity detection of detecting a change in the number of singularities that appear in the distribution of the response light based on a position of the optical fiber in which the disturbance has been applied;
and
performing a determination of determining that the proximity portion exists in the position of the optical fiber in which the disturbance has been applied when the number of the singularities has changed, and estimating an arrangement of the optical fiber connecting to the proximity portion.

2 more elements

An optical fiber route search device that confirms a path of one optical fiber that is arranged in a space so as to include at least one proximity portion in which the optical fiber is in proximity to itself,

the optical fiber route search device comprising:
a measured data input unit that input a distribution of response light of the test light in a length direction of the optical fiber, the distribution of response light is obtained by inputting test light to the optical fiber while applying a disturbance to an arbitrary section of the optical fiber;
and
a measurement result analysis unit that detects the number of singularities that appear in the distribution of the response light input to the measured data input unit, determines that the proximity portion exists in a position of the optical fiber in which the disturbance has been applied when detecting a change in the number of the singularities due to a change in a position of application of the disturbance, and estimates a status of an arrangement of the optical fiber connecting to the proximity portion.

1 more element

Dependencies are inferred from the claim text.

Optical fiber route search method, optical fiber route search device and program

Life of this patent

Optical fiber route search method, optical fiber route search device and program

Life of this patent

Abstract

Claims7