Liquid level sensor system based on monomode -multimode-monomode optical fiber structure and Bragg gratings
A fiber optic Bragg and liquid level sensor technology, which is applied in the direction of converting sensor output, using optical devices to transmit sensing components, liquid level indicators, etc., can solve the problem that the cladding mode reflection spectrum is not easy to obtain, etc.
Pending Publication Date: 2017-08-18
CHINA JILIANG UNIV
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AI-Extracted Technical Summary
Problems solved by technology
A liquid level sensor system based on a monomode-multimode-monomode optical fiber structure and Bragg gratings comprises an electric linear platform, a temperature control platform, a water container, an optical fiber group, a circulator, a broadband light source and a spectrograph. The optical fiber group comprises first monomode optical fibers, second monomode optical fibers, multimode optical fibers and the Bragg gratings etched on the second monomode optical fibers, and is fixed vertically according to the sequence of the first monomode optical fibers, the multimode optical fibers and the second monomode optical fibers. The optical fiber group is soaked in the water container. The electric linear platform is connected with the optical fiber group through a support. The water container is arranged on the temperature platform. The optical fiber group is connected with the circulator. The circulator is connected with the broadband light source and the spectrograph clockwise. The liquid level sensor system has the advantages that the central wavelength of the Bragg gratings is positioned in a filter spectrum area at the edge of a sensor, and a Bragg grating reflection spectrogram is determined to measure the liquid level, so that operability and sensitivity are high, structure is simple and loss is low.
Machines/enginesLevel indicators +2
Light sourceLiquid level sensor +12
- Experimental program(1)
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