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Proceedings Paper

A hybrid optic-fiber sensor network with the function of self-diagnosis and self-healing
Author(s): Shibo Xu; Tiegen Liu; Chunfeng Ge; Cheng Chen; Hongxia Zhang
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Paper Abstract

We develop a hybrid wavelength division multiplexing optical fiber network with distributed fiber-optic sensors and quasi-distributed FBG sensor arrays which detect vibrations, temperatures and strains at the same time. The network has the ability to locate the failure sites automatically designated as self-diagnosis and make protective switching to reestablish sensing service designated as self-healing by cooperative work of software and hardware. The processes above are accomplished by master-slave processors with the help of optical and wireless telemetry signals. All the sensing and optical telemetry signals transmit in the same fiber either working fiber or backup fiber. We take wavelength 1450nm as downstream signal and wavelength 1350nm as upstream signal to control the network in normal circumstances, both signals are sent by a light emitting node of the corresponding processor. There is also a continuous laser wavelength 1310nm sent by each node and received by next node on both working and backup fibers to monitor their healthy states, but it does not carry any message like telemetry signals do. When fibers of two sensor units are completely damaged, the master processor will lose the communication with the node between the damaged ones.However we install RF module in each node to solve the possible problem. Finally, the whole network state is transmitted to host computer by master processor. Operator could know and control the network by human-machine interface if needed.

Paper Details

Date Published: 11 November 2014
PDF: 7 pages
Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 927404 (11 November 2014); doi: 10.1117/12.2073357
Show Author Affiliations
Shibo Xu, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information and Technical Science (China)
Tiegen Liu, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information and Technical Science (China)
Chunfeng Ge, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information and Technical Science (China)
Cheng Chen, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information and Technical Science (China)
Hongxia Zhang, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information and Technical Science (China)


Published in SPIE Proceedings Vol. 9274:
Advanced Sensor Systems and Applications VI
Tiegen Liu; Shibin Jiang; Niels Neumann, Editor(s)

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