Passive optical fiber starring network with self-healing function

Abstract

The invention discloses a passive optical fiber starring network with a self-healing function. The passive optical fiber starring network comprises a starring network serving as the upper layer network and an annular network serving as the lower network, and further comprises a central node provided with a light source. An incident light signal sent by the light source is divided into N paths of optical signals through a 2*N coupler arranged on the central node, the N paths of optical signals are sent to N 1*2 couplers connected with the 2*N coupler, and therefore the starring network is formed. All branches of all the 1*2 couplers are connected in an adjacent mode and provided with FBG sensors, and therefore the annular network is formed. In each FBG sensor of the annular network, when an optical fiber of one branch is broken, the upstream optical signals on the other branches can still be transmitted to the FBG sensor, sensing signal emission exists all the time, all the FBG sensors on the annular network are kept in the normal working state, and therefore the self-healing function is achieved. According to the passive optical fiber starring network, self-healing of the sensor network can be achieved in the severe electromagnetic interference environment, and the passive optical fiber starring network has wide social benefits and economic benefits.

Description

technical field [0001] The patent of this invention relates to a passive optical fiber sensor network with self-healing ability, which is one of the technologies of the Internet of Things. Background technique [0002] The emergence of Internet of Things technology has brought a new revolution to the development of information technology. The Internet of Things is an information interaction between things and things, people and things, and is an extension of the sensor network. The sensor network is a network composed of sensor nodes, which is the basis for realizing the Internet of Things. At present, there are mainly two modes of sensor networks, one is optical fiber sensor network and the other is wireless sensor network. , can only be used alone. With the increase of the number of sensor nodes in the sensor network, the reliability of the sensor network is particularly important. In particular, the breakage of the connecting optical fiber will cause a large number of...

AI Technical Summary

Problems solved by technology

This method can realize network self-healing, but in the implementation process, it is limited by the granularity of computer computing network, which makes the realization of self-healing function and the time of self-healing limited.

Patent No. 201010252698.8 "A Large-Capacity Self-healing Optical Fiber Sensor Network" also mentions a large-capacity self-healing optical sensor network, which uses active device optical switches to achieve network self-healing. In certain occasions (such as in a strong electric field), the self-healing function of the network will be disturbed by the external environment, which will affect the performance of the sensor network

It can be seen that the current research on the self-healing of optical fiber sensor networks is mainly realized by using active devices, and there is no optical fiber sensor network with self-healing functions based on passive devices.

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