The Design Of Portable Indoor Environment Monitoring

As people increasingly value the environment and their health, the measure and control of the indoor air quality status gets more and more concerns, the monitoring category of the harmful gas is also more and more in the indoor air. At one time, the precision demand for portable indoor air monitoring is much higher and higher. Compared with the traditional one, portable indoor environment monitoring has the characteristics of high precision, strong anti-noise, good stability and environment adaptability, examining many air categories, integrating measure with control.Firstly, the general design scheme of the portable indoor environment monitoring is described, which include the systematic working principle based on the theory of the stable voltage electrolysis type transducer and the reflecting mechanism of the light accelerant, the collectivity scheme of the hardware design and the software design in the paper. Secondly, the systematic hardware design and software realization are expatiated, which include the down microprocessor hardware design based SMC, the programming on the software anti-jamming in the system and the upper computer software design based on Windows 2000 operating system.Thirdly, the application idea of the data fusion in indoor environment monitor is brought forward, which includes the the theory of the D-S evidence reasoning in the application, the idiographic realization and the analysis of the simulation result with MATLAB of the D-S evidence reasoning data fusion algorithms.Finally, through the cooperation of the hardware and software, the portable indoor environment monitoring device is developed.In addition, in order to improve the measuring precision, as for problems of measuring precision not high and environmental adaptability bad, which is affected by factors such as the environment temperature,the pressure ,the air flow and the humidity. The thesis focuses on the solution of the following problems: (1) Adopting multi-spot on-line monitor. (2) Using the complex straining wave arithmetic to enhance sampling accuracy. (3) Realizing the D-S...