Gas sensor for detecting exhaled gas methane

A technology of gas sensor and methane gas, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problem that the gas sensor cannot meet the requirements of human exhaled methane detection, so as to facilitate the promotion and popularization, reduce the detection cost, and operate Maintain Simple Effects

Pending Publication Date: 2021-03-26
SUNVOU MEDICAL ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, these three types of gas sensors are far from meeting the requirements for human exhaled methane detection.

Method used

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  • Gas sensor for detecting exhaled gas methane
  • Gas sensor for detecting exhaled gas methane
  • Gas sensor for detecting exhaled gas methane

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] This example uses figure 1 The schematic diagram of the device shown is assembled with a gas sensor for detecting exhaled methane, including a gas sensor (1), a filter structure (2) and a constant temperature structure (4), and the filter structure (2) is sequentially connected with the gas sensor (1). The constant temperature structure (4) heats up or maintains the temperature of the gas sensor (1) and the filter structure (2) to ensure the filtration efficiency of the filter structure (2) and the signal stability of the gas sensor (1).

[0026] The gas sensor (1) used in this embodiment is prepared by using the method proposed in 200810242877.6 "Metal Oxide / Carbon Nanotube Gas Sensor".

[0027] The filter structure (2) used in this embodiment includes a hydrogen filter layer (21), a VOC filter layer (22), and a water filter layer (23). 3 filter layers, such as figure 2Shown is assembled layer by layer. The filler of the hydrogen filter layer (21) is a hydrogen eli...

specific Embodiment 2

[0034] This example uses image 3 The schematic diagram of the device shown is assembled with a gas sensor for detecting exhaled methane, including a gas sensor (1), a filter structure (2), a constant temperature structure (4) and a replacement chamber (5). This embodiment is based on the first embodiment, and a replacement chamber is added between the filter structure (2) and the gas sensor (1). The chamber of this embodiment has an air outlet, and the exhaled breath sample enters the replacement chamber after being filtered by the filter structure, and then diffuses into the gas sensor, effectively preventing the multi-layer filter structure from affecting the gas flow diffusion and prolonging the response time of the methane gas signal , which can further improve the detection efficiency.

specific Embodiment 3

[0036] This example uses Figure 4 The schematic diagram of the device shown is assembled with a gas sensor for detecting exhaled methane, which consists of a gas sensor (1), a filter structure (2), a catalytic combustion structure (3) and a constant temperature structure (4). The filter structure (2), the gas sensor (1) and the catalytic combustion structure (3) are sequentially connected through each other, and the gas outlet of the catalytic combustion structure (3) is connected with the air inlet of the filter structure (2) to form a circulating gas path . The constant temperature structure (4) heats up or maintains the temperature of the gas sensor (1) and the filter structure (2) to ensure the filtration efficiency of the filter structure (2) and the signal stability of the gas sensor (1).

[0037] The gas sensor (1) of this embodiment is a gas-sensing semiconductor-type element, and its catalytic material is mainly metal oxide, doped with CuO, and has a high response s...

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Abstract

The invention discloses a gas sensor for detecting exhaled gas methane. The gas sensor is composed of a gas sensitive element (1), a filtering structure (2), a catalytic combustion structure (3) and aconstant temperature structure (4). The gas sensitive element (1) is a gas sensitive semiconductor type element; the filtering structure (2), the gas sensitive element (1) and the catalytic combustion structure (3) are sequentially connected in a penetrating manner, and a gas outlet of the catalytic combustion structure (3) is connected with a gas inlet or a gas outlet of the filtering structure(2) to form a circulating gas path; the filtering structure (2) can filter responsive substances on the gas sensitive element (1), but does not filter methane gas; the filtering structure is composedof a carrier material, a catalyst or an adsorbent; the catalytic combustion structure (3) can fully combust methane gas; the constant temperature structure (4) is used for heating or keeping the temperature of the gas sensitive element (1) and the filtering structure (2) constant, so that the filtering efficiency of the filtering structure (2) and the signal stability of the gas sensitive element(1) are ensured.

Description

technical field [0001] The invention relates to the field of breath detection. Background technique [0002] Studies have shown that human methanogens and the concentration of methane produced in exhaled breath can be used to detect intestinal diseases, including gastrointestinal microecological imbalance, inflammatory bowel disease and colorectal cancer. The research of laboratory analytical instruments shows that the normal concentration range of methane exhaled gas is 1-10ppm. If it is lower than 1ppm, it is considered to lack methanogenic bacteria or not produce methane gas. If it is higher than 10ppm, it is diagnosed as excessive reproduction of methanogenic bacteria or growth, which may lead to constipation, inflammatory bowel disease, or even colorectal cancer (see North American Consensus on Exhaled Hydrogen and Methane Testing for Gastrointestinal Diseases, 2017). However, at present, the technologies that can meet the measurement lower limit and accuracy requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/497G01N31/10G01N31/12G01N27/12
CPCG01N27/125G01N31/10G01N31/12G01N33/497
Inventor 韩益苹郑李纯韩杰
Owner SUNVOU MEDICAL ELECTRONICS
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