Cascaded optical fiber respiratory sensing system and testing method thereof
A sensing system and optical fiber sensor technology, applied in the direction of using optical devices to transmit sensing components, evaluating respiratory organs, etc., can solve the problems of not applying single-mode-few-mode-multi-core-few-mode-single-mode optical fiber sensors, etc. Achieve the effect of concentrated energy, good visibility and convenient welding
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[0028] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the described specific embodiments are only for explaining the present invention, and are not intended to limit the present invention.
[0029] Such as figure 1 As shown, a cascaded optical fiber breathing sensing system proposed by the present invention includes a stabilized power supply 1, a broadband light source and its drive circuit 2, an optical fiber coupler 3, a cascaded optical fiber sensor 4, a spectrum demodulator 6, Data acquisition card 7, microprocessor 8 and display output unit 9.
[0030] The cascaded optical fiber sensor 4 is a single-mode-few-mode-four-core-few-mode-single-mode cascaded optical fiber sensor, and the outer side of the cascaded optical fiber sensor 4 has a layer of strip-shaped elastic fabric, The single-mode optical fiber at both ends of the cascaded optical fiber sensor 4...
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