Based On Wireless Sensor Design Of The Control System Of Greenhouse Environment Parameters And Optimization

Greenhouses for the growth of economic crops provides a good environment,its economic and social benefits make greenhouse cultivation facilities is an important part of agriculture.The facility agriculture needs less manpower and material resources,high yield,less and the rapid development of greenhouse intelligent control technology,solve the above problem,both developing countries and developed countries gave high attention.Our country is an agricultural country,although the size is very big,but because of large population,and the terrain is complex,unfavorable factors influence more,cultivated land resources is relatively scarce.But with the development of urbanization process to speed up the step by step,China's rapid economic development,and efforts to developing the high efficiency,high yield,high quality,safety,ecological modernization of agriculture,further improve the technology content of agriculture,it is the necessary result of social development.This paper is mainly aimed at the environmental conditions in our country in the greenhouses affect crop growth and development of environmental parameters control problem,done in-depth research.Based on sensors,cucumber as the research object,by using wireless sensors to collect environment parameter of greenhouses,and through the ZigBee network to transmit data collected first place machine,PC is derived through the various environmental factors control algorithm,carries on the simulation using MATLAB software.And through the standard error(RMSE)inspection index of fitting curve.Finally got the following conclusions:(1)Completed the sensor interface debugging programs and execute a program,the experimental results showed that sensor can stable job,and faster execution speed response.Able to complete in greenhouses environment parameter data collection work.And to be able to collect data timely return to the upper machine,processing and analysis.(2)To sort out,analyze and calculate the influence of greenhouse environment parameter control algorithm,step by step,through the principle of energy balance and mass balance is derived.Deduced the greenhouse temperature control,humidity control algorithm and CO2 concentration control algorithm.(3)Using MATLAB software to implement the simulation of algorithm,the cucumber as the research object,the fitting out of the authentication object parameter variation curve of cucumber to grow in the best environment.Compared with the target curve,the simulation curve with high contact ratio,shows the feasibility of the algorithm.Several validation index showed that root mean square error(RMSE)values were 0.2031,0.2041 and 0.0094,small errors;Standard root mean square error(NRMSE)values are 0.85%,1.17%and 0.85%respectively,are controlled within 10%,shows that the precision of simulation is higher,in order to test the accuracy and precision of the algorithm.So as to realize the control of the curve of the greenhouse environment,the parameters of the greenhouse environment in every moment to achieve the desired crop growth environment.