Research And Design Of A Greenhouse Network Monitoring System Based On Raspberry Pi

At present,most of the traditional greenhouse still keep the state of the manual management,backward technology,cumbersome management in our country.In view of this situation,this topic has designed a set of intelligent greenhouse network monitoring system to replace the complicated artificial production.The system can realize real-time collection of greenhouse temperature,greenhouse humidity,soil humidity and light intensity,and transmit real-time data through 2.4G wireless communication,finally it is displayed in the form of web page.The greenhouse network monitoring system can automatically collect greenhouse temperature,greenhouse humidity,soil humidity and light intensity.The design has a total of six collection points,the 6 acquisition points transmit the above parameters to the raspberry pi via 2.4G wireless communication respectively,in order to improve the environmental monitoring ability and anti-interference ability of greenhouse,a multisensor data fusion algorithm based on trust degree is adopted.The trust degree matrix is established to evaluate the comprehensive trust of data collected by each sensor,the proportional weights of each sensor are obtained by allocating all the data scientifically and rationally,and then we get the fusion results.The greenhouse is a complex system of nonlinear,large delay,strong coupling,theyaffect and interact between environmental factors,the control judged only by the threshold value to control the greenhouse can not meet the actual use of the demand,support vector machine algorithm is adopted,listing all control combinations and removing the conflicting control combinations by consulting agricultural experts,taking representative samples for training and establishing models,this model is used to make the final control decision for the fused data,such as when the temperature is too high to open the ventilation equipment to cool the greenhouse,when the light is too strong to open the mask to shade,etc.Raspberry pi is used as a web server in this topic,users can access the information in the form of web pages whenever and wherever,helping users save from buying extremely expensive virtual hosts or cloud servers,enabling managers to use internet devices to view the growth environment and intelligent control status of greenhouses,the manager can watch the real-time image of the greenhouses to get the most intuitive growth dynamics at the same time.The experimental results show that the system can monitor greenhouse temperature,greenhouse humidity,soil humidity and light intensity accurately,and the transmission of the data is safe and stable.The control terminal is controlled accurately,the web page display is complete,the overall system performance is stable,achieving the desired requirements.