Distributed optical fiber sensing system

Abstract

The invention provides a distributed optical fiber sensing system, which belongs to the technical field of optical fiber measurement and comprises a light source, an optical filter and a plurality oftest boxes; the plurality of test boxes connected with a computer are arranged at intervals along the length direction of the optical fiber, and the test boxes are used for changing the temperature, vibration and strain of the optical fiber; the computer is used for transmitting signal information and the positions of the plurality of test boxes through a signal processor, and simulating a plurality of distributed curves when the value of a single parameter in the corresponding temperature, vibration and strain on the whole length of the optical fiber changes, and determining a fault curve containing an actual fault point and a corresponding fault value according to the plurality of related distributed curves. According to the distributed optical fiber sensing system provided by the invention, the fault curve is determined according to the plurality of distributed curves, and then the fault value corresponding to the parameter in the fault curve is calculated, so that the problem thatthe scattered light signal information obtained by feedback is inaccurate due to relatively long optical fiber length can be avoided, and the data accuracy is further ensured.

Description

technical field [0001] The invention belongs to the technical field of optical fiber measurement, and more specifically relates to a distributed optical fiber sensing system. Background technique [0002] Distributed fiber optic sensing systems are mainly used in industries such as transportation, construction, electric power, coal mines and petrochemicals, and their function is to measure various parameters of these important places in real time. It plays an important role in ensuring the normal operation of industrial system equipment and ensuring the safety of life and property. In the existing method, the energy of the feedback scattered light signal decreases sharply with the increase of the distance, which has a great impact on the accuracy and cannot realize long-distance detection. Contents of the invention [0003] The purpose of the present invention is to provide a distributed optical fiber sensing system, aiming at solving the problem that the energy of the fe...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a distributed optical fiber sensing system, which aims to solve the problem that with the increase of distance, the energy of the feedback scattered light signal decreases sharply, which has a great impact on accuracy and cannot realize long-distance detection.

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