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Methane gas sensor based on optical material and monitoring system

A technology of methane gas and optical materials, applied in the field of micro-nano optics, can solve the problems of short service life, low sensitivity, difficult to achieve accurate monitoring of gas concentration, etc., and achieve the effect of strong applicability and accurate detection data

Pending Publication Date: 2022-06-07
XIAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] Based on this, the present invention provides a methane gas sensor and monitoring system based on optical materials to solve the problems of low sensitivity, poor precision, and short service life in existing monitoring technologies, and it is difficult to realize the detection of CH 4 Technical Problems of Accurate Monitoring of Gas Concentration

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  • Methane gas sensor based on optical material and monitoring system
  • Methane gas sensor based on optical material and monitoring system
  • Methane gas sensor based on optical material and monitoring system

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Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Terms such as "up", "down", "left", "right", "middle" and "one" quoted in the preferred embodiment are only for the convenience of description and clarity, and are not intended to limit the scope of the present invention. The scope of implementation, the change or adjustment of the relative relationship, and the technical content without substantial change, shall also be regarded as the scope of the present invention.

[0031] like figure 1 and 2 As shown, the present invention provides a methane gas sensor based on optical materials, comprising a substrate 1, a nano-dielectric column layer 2 and a gas sensing layer 3 sequentially arranged in a stacked structure from bottom to top, and the nano-dielectric column layer 2 is composed of several It is composed of nanometer dielectric pillars 4 distributed in an array, and the upper and lower ends of...

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Abstract

The invention relates to a methane gas sensor based on an optical material and a monitoring system, the methane gas sensor comprises a substrate, a nano dielectric cylinder layer and a gas sensitive layer which are sequentially arranged in a laminated structure from bottom to top, the nano dielectric cylinder layer is composed of a plurality of nano dielectric cylinders distributed in an array; the upper end and the lower end of each nano dielectric cylinder are connected with the gas sensitive layer and the substrate respectively, the gas sensitive layer is made of a material sensitive to methane gas, the nano dielectric cylinders are made of a material with the dielectric constant larger than 10 at the infrared band of 1530-1565 nm, and the substrate is made of a material with the infrared band of 1530-1565 nm and without absorption loss. According to the invention, the CH4 gas concentration is monitored by using a gas-sensitive mechanism, and the detection data is accurate, stable and reliable; and the gas sensitive layer of the methane gas sensor is in contact with CH4 gas to cause the refractive index change of the gas sensitive layer, so that the reaction in a gas pool can greatly avoid the influence of environmental factors such as temperature and humidity in a coal mine on detection.

Description

technical field [0001] The invention relates to the technical field of micro-nano optics, in particular to a methane gas sensor and monitoring system based on optical materials. Background technique [0002] Nano-optics technology is one of the most active frontiers in the development of optical disciplines. It combines the cutting-edge achievements of photonics and nanotechnology. The main advantage is that it can realize many new functions on the basis of local electromagnetic interaction. [0003] In recent years, with the development of micro-nano optical technology, the application of optical metamaterials in the field of sensing and monitoring has received extensive attention. Optical metamaterials can enhance local electromagnetic fields to form characteristic resonance responses; and these resonance responses are very sensitive to changes in the refractive index of the surrounding medium, and gas molecules can cause changes in the refractive index of gas-sensitive ma...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/41G01N21/27
CPCG01N21/01G01N21/4133G01N21/27
Inventor 马天张证凯唐小龙罗冬梅王靖康
Owner XIAN UNIV OF SCI & TECH
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