System and method for automatically acquiring and analyzing trace gas

Abstract

The invention relates to a system for automatically acquiring and analyzing a trace gas, which comprises a central control computer, an industrial control module group, a sampling part and a gas acquisition and analysis part, wherein the central control computer is used for writing programs by means of industrial control configuration software, generating and transmitting tank cover, gas passage and gas analysis commands, and receiving and storing analog signals which contain environmental meteorologic parameters and trace gas concentration data and are transmitted by the industrial control module group; the industrial control module group is respectively connected with the central control computer, the sampling part and the gas acquisition and analysis part; the gas acquisition and analysis part is connected with a pipeline of the sampling part; the industrial control module group is used for receiving industrial control commands, outputting multiple switching signals, and controlling the sampling part and the gas acquisition and analysis part to automatically carry out tank cover switching, gas acquisition and trace gas concentration analysis according to the programs; and the industrial control module group is used for processing current signals output by the sampling part and voltage signals output by the gas acquisition and analysis part and outputting the analog signals containing the environmental meteorologic parameters and the gas concentration data.

Description

technical field [0001] The invention belongs to the measurement of soil and low vegetation (methane, carbon dioxide, nitrous oxide and nitric oxide), and relates to an automatic collection and analysis system and method for trace gases. Background technique [0002] In the past century, the global climate change caused by the increase in the concentration of greenhouse gases such as carbon dioxide, methane and nitrous oxide in the atmosphere has had a major impact on the world's economy, society and ecological environment, and has seriously threatened the sustainable development of the economy and the national economy. Safety. Soil is the main source of trace gases in the atmosphere, especially agricultural activities relying on soil, especially atmospheric CH 4 , CO 2 , N 2 An important source of trace gases such as O and NO. Estimates of the sources of these trace gases, which have important contributions to the greenhouse effect and atmospheric chemistry, remain subje...

AI Technical Summary

Problems solved by technology

It is due to the unavoidable large error caused by low-frequency observations that for N 2 It is very difficult to study the O emission process and its control mechanism of environmental factors

Existing manual observation techniques cannot obtain in situ effective long-term synchronous observation data of carbon and nitrogen trace gases, and existing in situ observation techniques can only measure CH 4 and N 2 For the determination of these two components, it is urgent to develop in-situ automatic observation technology to measure various carbon and nitrogen components (CH 4 , CO 2 , N 2 O, NO) at the same time to study the terrestrial ecosystem-atmospheric carbon and nitrogen trace gas exchange process, law and mechanism, to obtain the measured data and parameters to verify the model, and to evaluate the effectiveness of ecosystem greenhouse gas emission reduction measures

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