Optical fiber polarization sensing thunder and lightning positioning system and method

Abstract

The invention discloses an optical fiber polarization sensing thunder and lightning positioning system. A first light source, a first circulator, a first wavelength division multiplexer and a first photoelectric detector of a first host are sequentially connected, and the first wavelength division multiplexer, a first analyzer and a second photoelectric detector are sequentially connected; a second light source, a second wavelength division multiplexer, a second circulator and a second analyzer of a second host are connected in sequence, and the second analyzer is connected with the second wavelength division multiplexer; and the first circulator and the second circulator are connected through an optical fiber composite overhead ground wire, and the first photoelectric detector and the second photoelectric detector are connected with an upper computer through a high-speed acquisition card. The first light source emits a direct-current optical signal with a first wavelength, the secondlight source emits a direct-current optical signal with a second wavelength, and the two wavelengths are different. In the invention, thunder and lightning positioning and signal acquisition are realized based on a double-end correlation single-end detection method so that technical problems that a requirement of a traditional double-end method on a two-end time synchronization system is high anda measurement dead zone exists in a single-end method are solved.

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...

AI Technical Summary

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

Images