Atmospheric NO2 detection system based on electrochemical transducer

Abstract

The invention discloses an atmospheric NO2 detection system based on an electrochemical transducer, and belongs to the field of atmospheric environmental monitoring. The atmospheric NO2 detection system comprises a sensor module, a data acquisition and processing module, and a man-machine interaction visualized module; the sensor module comprises a NO2 four-electrode electrochemical transducer and a temperature and humidity sensor; the data acquisition and processing module comprises a low noise signal conditioning circuit and a DSP main control unit; the man-machine interaction visualized module comprises a LabVIEW 2015 platform and a sound-light alarming module. Compared with a traditional NO2 detection system, the atmospheric NO2 detection system based on the electrochemical transducer is more concise, small in size and convenient to carry, and is capable of achieving a high-accuracy measurement of NO2 with low concentration of a ppb order in the atmosphere, accurately eliminating interference, caused by zero wander of the electrochemical transducer and ambient temperature and humidity change, on a detection result of the NO2 when the concentration of NO2 is low, and improving reliability of the detection result; meanwhile, the atmospheric NO2 detection system based on the electrochemical transducer is high in stability, high in sensitivity, high in linearity and good in human-computer interaction interface, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of atmospheric environment monitoring, in particular to an electrochemical sensor-based atmospheric NO 2 detection system. Background technique [0002] In recent years, with the development of the economy, the exhaust gas emissions in production and life have gradually increased, of which NO 2 It is an important atmospheric trace gas, mainly from fossil fuel combustion, motor vehicle exhaust emissions, etc. It participates in the photochemical catalysis of ozone generation, which will lead to the increase of photochemical smog and ozone and even the formation of acid rain, which seriously endangers the atmospheric environment and human health. Therefore, it is imperative to carry out research on atmospheric NO 2 Accurate monitoring and timely early warning of concentration. [0003] Traditional NO 2 Most of the detection instruments are based on the principle of spectral absorption, with complex structures, many ...

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Problems solved by technology

[0003] Traditional NO 2 Most of the detection instruments are based on the principle of spectral absorption, with complex structures, many interference factors, strict operation requirements, and bulky volume, which cannot meet the needs of simplicity, precision, and portability. Therefore, in order to adapt to atmospheric trace NO 2 The miniaturization and portable development of detection equipment, the design of electrochemical sensors based on the detection of ppb level (10 -9 )NO 2 detection system

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