Optimization Of Difference Absorption Algorithm In Spectrum Measurement System

In recent years,with China’s rapid economic development,people’s living standards are quickly improved,which in turn promotes the development of transport as well as heavy industry.More and more detrimental substance such as:nitrogen oxides,hydrocarbons,and sulfides,these gases wantonly discharge,greatly undermined the environment.Atmospheric composition of complex components from the chemical reaction is easy to produce secondary pollution,such as aldehyde,acid,photochemical smog and other new pollutants.Compared to the first pollution,secondary pollution hazards seriously which is more difficult to control.The environmental pollution resulted by it has been familiarly advertence.Governments at all levels of the world are doing all categories of exertion to govern air pollution.It’s urgent to monitor the atmosphere,start prevention and control work.For the detection of harmful gases,traditional instruments are mostly using electrochemical sensors to measure,but this detection method has the following two shortcomings:First,the electrochemical sensor’s short-life problem,that is saying when use of electrochemical sensors often needs detection and replacement,which will increase the detection cost,and the detection process zero drift,cross-interference problem,which will influence the monitor exactly;Second,the use of a certain electrochemical sensor detection equipment can detect a gas,such as the need to detect A variety of gases,correspondingly,you need more than detection equipment.In this paper,the most popular spectral measurement method is used to monitor the density of gas,and the spectral measurement method can effectively avoid the shortcomings of the electrochemical sensor.The traditional algorithm for detecting gas concentration is the differential absorption spectroscopy technique based on Bill’s law.The differential absorption algorithm needs to solve a complicated hyper-definite equation when solving the concentration,and it is easy to produce the solution error.The absorption algorithm can’t distinguish the NO2 and NO gas very accurately.Consequently,the primary section of this project is to optimize the prescriptive algorithm.The genetic algorithm is applied to optimize the custumal algorithm.The optimized algorithm can be used to reduce the optimal error within 5%.In this paper,the optimization of the differential absorption algorithm in the spectrum measurement system,which mainly include the following functions:data obtaining,data handling and data demonstrating.Data obtaining function is to collect the spectrometer to capture the gas molecules absorb photons after the changes in the state.Data handling function is more collected data and optimization algorithms to calculate the optimal concentration.Data demonstrating function is to calculate the concentration of the display Screen display.