Research On Key Technologies Of Multi-component Typical Gas Monitoring

The military industry will involve chemical products in the process of production and development.During the process of production and use,these products will produce toxic,harmful,and flammable gases,which seriously affect the safety of production and life.In order to solve the problems of a few measurement types,low precision,and untimely and inaccurate monitoring in the typical gas monitoring process of the military industry,this paper conducts in-depth research on the key technologies of multicomponent gas monitoring.By studying the detection principle of photoacoustic spectroscopy,according to the absorbing spectrum combined with the filter characteristics selected the optimal filter combination for the system,and a multicomponent gas monitoring system based on photoacoustic spectroscopy was built;gas monitoring experiments were carried out to monitor typical gases dissolved in transformer oil,and the system collected The gas data is transmitted to the computer,and the host computer system is designed based on QT to realize data visualization and build a database;to solve the problem of inaccurate monitoring results caused by the influence of subjective and objective factors in the monitoring process,the algorithm is used for correction,and a multi-component gas qualitative and quantitative method is proposed.The calibration algorithm has realized high-precision qualitative and quantitative monitoring of multi-component typical gases and completed the research on key technologies for multi-component typical gas monitoring.The specific research work is as follows:(1)The common gas detection methods are studied,and the key technical issues of the monitoring system are analyzed.Starting from the theory of gas infrared absorption spectroscopy,the basic principles of photoacoustic spectroscopy detection technology have been studied in depth,and important components of photoacoustic spectroscopy systems such as light sources,choppers,filters,photoacoustic cells,and acoustic sensors have been studied and selected.A photoacoustic spectroscopy multi-component gas monitoring system was built;(2)Select the infrared light source and filter to realize multi-component gas monitoring.By studying the characteristics of the gas absorption spectrum and combining the characteristics of the filter,the optimal filter combination is selected for the multi-component gas monitoring system,reducing the error in system monitoring provides technical support for system monitoring of multi-component gases;(3)The upper computer system was designed based on QT,and the collected data were visualized in real-time.At the same time,a database was built.Aiming at the toxic,harmful,and flammable typical gases dissolved in transformer oil in the military industry,the photoacoustic spectrum was built by using multiple Component gas monitoring system,carrying out monitoring experiments on it,transmitting the monitored gas data to the host computer system,laying a solid foundation for further processing the collected data;(4)Aiming at the monitoring errors caused by the complex environment,noise factors,improper operation of personnel,etc.during the monitoring process,a multicomponent gas qualitative and quantitative model was constructed,and a support vector machine multi-component gas qualitative correction algorithm based on the whale algorithm was designed And the long-short-term memory neural network multicomponent gas quantitative correction algorithm based on the sparrow search algorithm,simulated the typical gas data in the transformer oil monitored by the experiment and compared it with other algorithms,verified the correction effect of the two algorithms,and the qualitative algorithm The accuracy rate can reach more than 98%,and the accuracy rate of the quantitative algorithm can reach more than 99%,which ensures the accuracy of the monitoring results of the multi-component gas monitoring system and improves the monitoring efficiency of multi-component typical gases.