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Optical fiber brag sensing network having survivable guarantee

An optical fiber sensing and network technology, applied in the direction of optical fiber transmission, ring network, transmission system, etc., to achieve the effect of reducing power loss and loss

Inactive Publication Date: 2007-09-19
SOUTHEAST UNIV
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  • Optical fiber brag sensing network having survivable guarantee
  • Optical fiber brag sensing network having survivable guarantee
  • Optical fiber brag sensing network having survivable guarantee

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Embodiment Construction

[0018] With reference to Fig. 1, a kind of optical fiber sensor network comprises at least first level subnetwork 14 and second level subnetwork 15, is characterized in that first level subnetwork 14 and / or second level subnetwork 15 adopts subnet module, Referring to Figure 3, the subnet module includes a master node 1 and at least two slave nodes 3, the master node 1 is connected to the slave nodes 3 through the transmission branch 2, and a sensing branch is connected between adjacent slave nodes 3 4. The output terminal of the slave node in the first-level subnetwork 14 is connected to the input terminal of the master node in the second-level subnetwork 15, and an optical switch 12 is connected to the optical sensor signal feedback terminal of the master node in each level of subnetwork And the optical sensing signal feedback terminals of the master nodes in the subnets at all levels are respectively connected to the input terminals of the optical switch 12 .

[0019] The a...

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Abstract

The invention relates to an optical fiber sensor network for project and equipment which needs real-time monitoring. The optical fiber sensor network at least comprises a first subnet (14) and a second subnet (15), both of which adopt subnet module. The subnet module includes a host node (1) and at least two slave nodes. The host node (1) is connected with the slave nodes (3) via a transmission branch, and sensing branch (4) is connected between adjacent slave nodes (3). The output end of the slave node in the first subnet (14) is connected with the input end of the host node in the second subnet (15). The optical sensing signal feedback end of host node in each subnet is connected with an optical switch (12), and the optical sensing signal feedback end of host node in each subnet is connected with the input end of the optical switch (12). The invention overcomes the survivability shortage of the current sensing network based on optical firber and grating.

Description

technical field [0001] The invention relates to the technical field of industrial control and sensing, in particular to an optical fiber sensing network used in projects and equipment requiring real-time monitoring. technical background [0002] Fiber Bragg Grating (FBG) sensors are considered to be one of the most promising new fiber optic sensing technologies for practical application. Compared with traditional electronic sensors, it not only has the characteristics of being free from electromagnetic interference, long-distance full-optical measurement, high measurement accuracy, and the sensor detection quantity is wavelength information, but also can distribute multiple sensors into a sensor network. Traditionally, fiber grating sensor networks generally adopt the form of series (wavelength division multiplexing) and parallel (space division multiplexing). The network structure is simple, and theoretical analysis shows that it can meet the needs of large-scale long-dista...

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Application Information

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IPC IPC(8): H04L12/28H04B10/12H04B10/17H04B10/20H04L12/42H04J3/08H04B10/25
Inventor 孙小菡韦朴
Owner SOUTHEAST UNIV
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