Study On Automatic Cultivation System Of Home Gardening

Home gardening has become more and more important in people's daily life.However,in horticultural cultivation,the automatic cultivation system suitable for home gardening is still incomplete.Most of them rely on the perception of human eyes to determine the growth of plants.Existing home horticultural cultivation facilities have low degree of automation.In winter heating and high energy consumption in summer cooling,inconvenient use and other issues,it will easily lead to poor crop growth and even death.In order to solve the above problems,it is of great value to research the home gardening cultivation of the indoor terraces and outdoor courtyard platforms in the south and to carry out the research on the automatic cultivation systems for home gardening.The main research contents and results of this dissertation are shown as below:Firstly,analyzed the micro-environment of soilless cultivation of home horticulture,including air temperature,relative humidity and light intensity,analyzed the effects of microenvironment and soilless soil nutrient solution on plant growth,combined with actual home gardening.According to different needs,the cultivation frame structure for different seasons was designed.Secondly,analyzed the characteristics of soilless cultivation of home horticulture in two extreme environments in summer and winter,and established a dynamic thermal balance model in the cultivation frame.Using Matlab to simulate the physical temperature model of the cultivation under the specific environment of winter and summer season,and compared with the measured temperature in the cultivation frame.In the winter,the root mean square error between the temperature and the measured temperature in the cultivation frame was 0.69°C.In summer,the root mean square error of simulated temperature and actual measured temperature in the cultivation frame was 0.58.°C.The temperature curve is roughly the same,validating the reliability of the dynamic model within the cultivation frame.Thirdly,according to the thermal equilibrium dynamic model,a temperature fuzzy controller for automatic cultivation system was designed.Through Matlab programming,simulations of environmental temperature control in the cultivation environment under extreme weather conditions in summer and winter were conducted: the root mean square error between the simulated temperature control value and the temperature setting value in summer was 1.26°C,and the root mean square error in winter.The value is 2.55°C.Both winter and summer simulated values oscillated near the expected value,but basically reached the expected control demand.Lastly,the automatic cultivation and observation and control system was designed using sensor technology and wireless single-chip microcomputer technology,including the hardware and software of the sensor acquisition end,the implementing agency control end,and the upper computer man-machine interaction interface and data management software to achieve the real-time collection and control of the environmental impact factor parameters.Through the indoor natural environment and the cultivation environment of the same batch of cultivated tomato seedlings under the environment of the growth contrast test,the results show that: placed in the cultivation of tomatoes grow better.In the nursery test,through the analysis of the cooling and heating results of the tomato seedlings in the high temperature and low temperature weather cultivation frame,the tracked temperature curve and the target temperature curve of the actual measurement are roughly the same,and the maximum relative error is 8.69%.The developed home gardening automatic cultivation system has obvious cooling and warming effects,and has achieved the desired goal.