Research On IOT Application For Intelligent Wall Greening

At present,there is a problem that the percapita green area of cities in China is insufficient.According to the data of the National Bureau of Statistics,by the end of 2018,the total green area of parks open to the public in cities in China is 723740 hectares,while the national urban population has reached 83.137 million.In October 2018,according to the data released by the State Forestry and Grassland Administration,the per capita green area of urban parks in China is only 13.7m2,far lower than the best living environment standard of 60m2 proposed by the United Nations.Therefore,expanding greening is an important topic of urban construction in China,and indoor greening is an effective means to improve the per capita greening area.This paper presents an application of Internet of things for indoor wall greening,which can make full use of indoor vertical space and increase indoor green coverage area.The client mainly includes planting device and Android application.Planting equipment is an integrated small movable green wall with 4-layer groove structure,which has the ability of independent watering and light supplement.The device can also sense the information of soil temperature,humidity,illumination and water level in the water tank.In addition,the device uses WiFi communication module and smart cloud service to access the network.Android client is an important carrier of human-computer interaction.Users rely on Android client to realize remote management of plants and devices.The client includes seven functions:user management,equipment management,information perception,plant management,manual maintenance,automatic maintenance and safety management.Among them,"automatic maintenance" is the main innovation point of the product.The implementation of watering and light supplement is completely entrusted by the system,and the timing and degree of maintenance behavior are judged by the program.In the decision-making of the implementation degree of maintenance behavior in the strategy,the ideas and methods of expert system and fuzzy control in the control theory are used,and Mamdani Fuzzy Controller is constructed through a large number of expert knowledge and experience.In the implementation,the open source tool jfuzzylite is used to integrate the fuzzy controller into the Android project.In this study,the application of indoor wall greening was deployed and tested.The test results show that the application function and stability are up to the expected standard.In addition,a plant growth control experiment was designed to evaluate the effectiveness of the automatic maintenance strategy.In the experiment,the potted plants of the experimental group were placed in the planting trough of the planting equipment,and the applied automatic maintenance mode was started.In the control group,the potted plants were maintained in traditional way without any intelligent means.After 30 days,the length,leaf number and bud number of ivy were compared.Experimental data show that the application of automatic maintenance mode shows better greening effect than the traditional maintenance mode.Therefore,it can be concluded that under the laboratory environment,the application has the ability to conserve plants,and it is worth further optimizing and improving,and trying to be put into the market.According to the current design,a single indoor wall greening equipment occupies a plane area of 0.09m2 and a height of 0.74m.Under the condition that a total of 6 pots of green pineapple are placed in the two-layer planting trough,the estimated greening area is about 0.24m2,and the estimated maximum greening coverage area that the equipment can contribute is about 0.35m2.It can be seen that the proportion of the greening output area and plane occupation area of a single equipment is close to 4 times.If it is used for market promotion,it is easy to form standardized products with practical value and economic value.To some extent,it can solve the problem of low indoor greening rate,effectively increase the per capita greening area of the city,bring people a pleasant green experience,and play the role of purifying air and blocking noise.