Method for detecting gas based on sensor made of nano material
A technology for detecting gases and nanomaterials, which is applied in the analysis of materials, material resistance, and material analysis by electromagnetic means. It can solve the problems of low detection accuracy, low compatibility, and poor gas sensor sensitivity, and achieve high detection accuracy. Quality factor, the effect of improving sensitivity
Active Publication Date: 2017-02-15
JIANGXI NORMAL UNIV
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[0007] However, most of the above-mentioned gas sensors have poor sensitivity, low detection accuracy, low compatibility, and require additional power drive, and need to be connected to transmit signals or detection data
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[0027] Most of the existing gas sensors have poor sensitivity, low detection accuracy, low compatibility, and require additional power drive, and need to be connected to transmit signals or detection data. Taking the thermal linear sensor as an example, the thermal linear sensor is a semiconductor sensor that uses thermal conductivity changes, and is coated with SnO on the Pt wire coil. 2 In addition to heating, the Pt wire also has the function of detecting temperature changes. When a voltage is applied, the semiconductor heats up, oxygen is absorbed on the surface, and the concentration of free electrons decreases. When flammable gases exist, the concentration of free electrons increases due to the consumption of oxygen by combustion. The thermal conductivity increases with the increase of free electron concentration, and the heat dissipation rate increases accordingly. The temperature of the Pt wire decreases, the resistance value decreases, and the change of the resistance...
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Abstract
The invention discloses a method for detecting gas based on a sensor made of a nano material. The method comprises the following steps: obtaining a first curve, wherein the first curve is a curve of a frequency of the sensor and S11 under an environment without gas to be detected; placing the sensor in an environment to be detected, and obtaining a second curve, wherein the second curve is a curve of the frequency of the sensor and S11 under the environment to be detected; detecting whether the gas to be detected exists in the environment to be detected by comparing whether the resonant frequencies of frequency shifts of the first curve and the second curve have a change. The method for detecting the gas based on the sensor made of the nano material is high in sensitivity, high in detection precision and high in compatibility.
Description
technical field [0001] The invention relates to the field of gas detection, in particular to a method for detecting gas with a nanomaterial-based sensor. Background technique [0002] Environmental safety and industrial safety monitoring are prerequisites and basic guarantees for sustainable social and economic development. Under the influence of the rapid development of the global economy and various high-intensity human activities, environmental safety and industrial safety are facing huge challenges. The main environmental safety issues and industrial safety issues include: air pollution, water pollution, soil pollution, coal mine safety production, etc. Wait. [0003] One of the key factors to solve the main environmental safety problems and industrial safety problems is the research and development of advanced sensor devices. Advanced sensors can be used to monitor various toxic and harmful gases. Taking smog as an example, sulfur dioxide, nitrogen oxides and inhalable...
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IPC IPC(8): G01N27/12
CPCG01N27/12G01N27/127G01N27/227
Inventor 骆兴芳袁彩雷易强俞挺
Owner JIANGXI NORMAL UNIV