Realizing device of large-capacitance self-healing optical fiber sensing network based on light spectrum type optical fiber sensor and realizing method

Abstract

The invention provides a realizing device of a large-capacitance self-healing optical fiber sensing network based on a light spectrum type optical fiber sensor and a realizing method. The device comprises a light source, wherein the light transmitted from the light source sequentially passes through a coupler, n layers of sensing subnetworks, a wave length converter, a work optical fiber, a wavelength division multiplexer, an optical fiber, a receiving demodulator and a computer; and Maxn=the total energy of the light source / the energy required by each layer of sensing subnetwork. The invention is additively provided with a spare optical fiber and a cross connector in the network, thereby guaranteeing that the optical fiber sensing network can normally work when an optical fiber link goes wrong, so that the network has survivability. The number of sensors multiplexed by the sensing network is the sum of each layer of sensor, wherein, if each layer has k sensors, the number of the sensors is k*n. Maxk=the gross spectrum width of the light source / scanning resolution, thereby greatly expanding the capacitance of the sensing network. The light spectrum of the broadband light source is divided into m sections, Maxm=the gross spectrum width of the light source / the scanning resolution, the m sections are simultaneously scanned, and the scanning time can be shortened at the 1 / m of the original time, thereby improving the sensing speed of the sensing network.

Description

【Technical field】: [0001] The invention belongs to the technical field of optical fiber sensor networks, and in particular relates to a sensor network system based on the spectral characteristics of optical fiber sensors, which has large capacity and can self-heal and can measure multiple parameters at the same time. 【Background technique】: [0002] Sensing technology is one of the three pillars of the information industry. Optical fiber sensing technology has always been at the forefront of sensing technology development. [0003] Optical fiber sensors can be divided into functional and non-functional types according to the sensing principle. The former uses the optical fiber as a sensitive element, while the latter uses the optical fiber only as a transmission medium. In the functional fiber optic sensor, the intensity (amplitude), phase, polarization state and wavelength (frequency) of the light in the fiber are changed according to external factors, and are divided int...

AI Technical Summary

Problems solved by technology

However, this method will greatly increase the cost of the sensing system

Images