A cascaded optical fiber breathing sensor system and its testing method
A sensing system and optical fiber sensor technology, which is applied in the direction of using optical devices to transmit sensing components, evaluating respiratory organs, etc., can solve the problems of not using single-mode-few-mode-multi-core-few-mode-single-mode optical fiber sensors, etc. Achieve the effect of energy concentration, convenient welding and good stability
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[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments described 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 respiratory sensor 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 cascade optical fiber sensor 4 is a single-mode-few-mode-four-core-few-mode-single-mode cascade optical fiber sensor, and the outer side of the cascade-type optical fiber sensor 4 is covered with a layer of elastic fabric, The single-mode optical fibers at both ends of the cascade optical fiber sensor 4 are fixed...
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