Mine safety early warning system based on multi-fiber-core optical fibers
A coal mine safety and early warning system technology, applied in mining equipment, mining equipment, earthwork drilling and mining, etc., to achieve the effects of saving communication bandwidth, avoiding system errors, and reducing costs and complexity
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[0020] Such as figure 1 As shown, the present invention includes: a multi-core fiber, a multi-core fiber splitter, a light source module and a demodulation module; using different or the same light source module, the light is coupled into the multi-core fiber through the multi-core fiber splitter Fiber, multi-core fiber splitter will send the different physical quantities to be monitored to the demodulation system for demodulation.
[0021] The overall structure of the system is shown in figure 2 Shown. The optical fiber in the middle section can be a standard single-mode fiber with 3 cores, 4 cores or more. The core of the optical fiber can be increased or decreased according to the physical quantity to be monitored. The length of the optical fiber is generally 4 to 6 kilometers, and the length is variable according to the specific monitoring requirements of the coal mine. The light of the light source system is connected to the sensing fiber through a multi-core beam splitter...
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