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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

Active Publication Date: 2019-08-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, there is currently no fiber optic sensor with a single-mode-few-mode-multi-core-few-mode-single-mode structure, especially in the detection of respiratory physiological signals

Method used

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  • A cascaded optical fiber breathing sensor system and its testing method
  • A cascaded optical fiber breathing sensor system and its testing method
  • A cascaded optical fiber breathing sensor system and its testing method

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Embodiment Construction

[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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Abstract

Disclosed in the invention is a cascaded optical fiber respiratory sensing system comprising a voltage-stabilized power source, a broadband light source and a driving circuit thereof, an optical fibercoupler, a cascaded optical fiber sensor, a spectrum demodulator, a data acquisition card, a microprocessor and a display output unit. The cascaded optical fiber sensor being a single mode-less mode-multi-core-less mode-single mode cascaded fiber sensor comprises a multi-core fiber clamped and fused between a first less-mode fiber and a second less-mode fiber; the other end of the first less-modefiber is fused with an input single-mode fiber; and the other end of the second less-mode fiber is fused with an output single-mode fiber. Light from the broadband light source is coupled by the optical fiber coupler; the coupled light passes through the cascaded optical fiber sensor; a wavelength drift signal is received by the spectrum demodulator; the data acquisition card transmits the signalto the microprocessor; and the microprocessor carries out amplification, filtering, and separation on a series of wavelength drift signals to obtain respiratory signals. The system has advantages ofsmall size, light weight, simple structure, great easiness in preparation, high sensitivity and good performance of electromagnetic interference prevention and the like.

Description

Technical field [0001] The invention relates to a medical signal detection device, in particular to a breathing signal sensor realized by a single-mode-few-mode-multi-core-few-mode-single-mode fiber cascade structure. Background technique [0002] Respiration is an important physiological process of the human body. The monitoring and detection of human breathing is also an important part of modern medical monitoring technology. It is used to evaluate the patient's respiratory function status, diagnose the type and degree of respiratory disorders, and dynamically monitor the respiratory function of high-risk patients. Whether it is a disease of the respiratory system itself or other important organs, it will affect the respiratory center to a certain extent. Failure of respiratory function and failure of other organ functions are mutually causal. Therefore, a good respiratory function test is very important for the treatment of the disease. [0003] The extraction methods of respir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/26A61B5/08
Inventor 贾大功赵静张红霞刘铁根张以谟
Owner TIANJIN UNIV
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