Lightning location system and method based on optical fiber polarization sensing

Abstract

The invention discloses an optical fiber polarization sensing lightning positioning system: the first light source, the first circulator, the first wavelength division multiplexer, and the first photoelectric detector of the first host are connected in sequence, and the first wavelength division multiplexer The device, the first polarizer, and the second photodetector are connected in sequence; the second light source, the second wavelength division multiplexer, the second circulator, and the second polarizer of the second host are connected in sequence, and the second polarizer The circulator is connected to the second wavelength division multiplexer; the first circulator and the second circulator are connected with an optical fiber composite overhead ground wire, and the first and second photodetectors are connected to the host computer through a high-speed acquisition card; the first The light source emits a DC optical signal of the first wavelength, and the second light source emits a DC optical signal of the second wavelength, and the two wavelengths are different. The invention realizes lightning positioning and signal acquisition based on the method of double-end pair-to-shoot single-end detection, thereby solving the technical problems that the traditional double-end method has higher requirements on the two-end time synchronization system and the single-end method has a measurement dead zone.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and more specifically relates to an optical fiber polarization sensing lightning positioning system. Background technique [0002] Optical Fiber Composite Overhead Ground Wire (OPGW) is a new type of ground wire that has emerged in recent years. It can be used not only as a lightning protection wire but also as a communication trunk line. Due to its own communication characteristics, the lightning location can be performed through the OPGW itself. [0003] At present, there are few researches on the lightning detection of transmission lines based on OPGW at home and abroad, mainly Japanese scientists have carried out some theoretical research, and produced two major technical directions, one is the sensing technology based on Brillouin scattering, and the other is Sensing technology based on the polarization state of light. The first method is based on the research of the lightnin...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a lightning positioning system and method based on optical fiber polarization sensing, the purpose of which is to realize the detection of lightning position based on the double-ended method, thereby solving the problem of the double-ended method on both ends. Higher system requirements and the technical problem of measurement dead zone in the single-ended method

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