The Construcion And Application Of The Electrochemical Formaldehyde Sensor Evaluation Model

In recent years,with the rapid development of portable air quality monitor,more and more types of civil low cost electrochemical formaldehyde sensor are emerging.But because the lack of evaluation criteria and evaluation model,the formaldehyde sensor market is chaos anomaly,that bring serious damage to the interests of consumers.This topic is based on the characteristics and actual use demand of civil low cost electrochemical formaldehyde sensor,takes the electrochemical formaldehyde sensor as the research object of study,then evaluates and compares brands of sensor by establishing the electrochemical formaldehyde sensor evaluation model(DHXJQ model)which accords with the sensor industry market and consumer demand,provides the basis for the standard sensor market.In the model,the performance indicators of the electrochemical formaldehyde sensor are fully covered,and the market demand and working characteristics of the electrochemical formaldehyde sensor are comprehensively described and evaluated.This topic analysis the defects and shortcomings of evaluation method of sensor at present,compares the commonly used evaluation methods of multiobjective multi levels,then determines to use multi-objective fuzzy decision to construct electrochemical formaldehyde sensor evaluation model,and brings the uncertainty evaluation into electrochemical formaldehyde sensor model.Summarized the primary testing methods of formaldehyde sensors in various manufacturers,and improved through the experimental process,this topic works out a standard experimental system which is comprehensive,detailed and operable,provided reference for standardizing the experimental procedures and platforms.Combined with the nature and characteristics of testing process of formaldehyde sensor's performance index,this topic choices uncertainty components reasonable,formulates a set of standard calculation system for the uncertainty of the formaldehyde sensor,then testes and analyzes characteristic parameters of various brands of formaldehyde sensors comprehensively,obtaines the uncertainty components of formaldehyde sensors using the uncertainty calculation system.This topic establishes the index framework for premise,sets the index threshold under the framework of indicators as foundation,uses multiobjective fuzzy decision method,obtaines the weights by analytic hierarchy process(AHP)and entropy method,then a multi-objective fuzzy decision evaluation model for evaluating the working characteristics and application value of the electrochemical formaldehyde sensor was constructedUsing the measured uncertainty component data of each brand,this topic carries out the investigation of electrochemical formaldehyde sensor commonly used brand,found that electrochemical formaldehyde sensor differ greatly between brands and the same brand of different inter individual differences,and a lot of work in the anti disturbance and stability(drift)aspects need to do.