Humidity and stress double-parameter micro-optical fiber sensor based on carbon nanotube compound

Abstract

The invention discloses a humidity and stress double-parameter micro-optical fiber sensor based on a carbon nanotube compound. The humidity and stress double-parameter micro-optical fiber sensor comprises a super-continuous broadband light source, a single-mode optical fiber, a micro-optical fiber coupler, the carbon nanotube-polydimethylsiloxane (CNT-PDMS) compound and a spectrometer. The super-continuous broadband light source is connected with a first section of single-mode optical fiber, the other end of the first section of single-mode optical fiber is welded with one end 13 of the micro-optical fiber coupler, the other end 15 of the micro-optical fiber coupler is welded with a second section of single-mode optical fiber, and the other end of the second section of single-mode opticalfiber is connected with the spectrometer. Humidity sensitivity and elasticity characteristics of the CNT-PDMS compound are combined with a strong evanescent field and an elasto-optic effect of the micro-optical fiber coupler, so that humidity and stress are accurately measured at the same time. The sensor has the advantages of high sensitivity, high response speed, interference resistance, high reutilization rate and the like. The novel technology can be applied to detection of humidity and pressure of the surrounding environment of a precise electronic device.

Description

technical field [0001] The invention belongs to the application field of optical fiber components and two-dimensional nanometer materials, and in particular relates to an air relative humidity and stress detection technology based on the characteristics of carbon nanotube composites. Background technique [0002] With the rapid development of artificial intelligence technology, various sophisticated intelligent electronic devices have increasingly strict requirements on environmental humidity and pressure. When the relative humidity of the air is low, the static voltage will increase significantly, seriously endangering the safety of equipment and personnel; when the relative humidity of the air is too high, electronic products are more likely to rust and even short circuit, which seriously affects the performance of the equipment. When the load pressure reaches a certain level, it will have a certain impact on the use of electronic equipment, and even damage it. Therefore, ...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the simultaneous measurement of humidity and pressure cannot be realized in actual detection, or the sensitivity is not high during simultaneous measurement, and to provide a dual-parameter micro-fiber sensor for humidity and stress based on carbon nanotube composites

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