Model of the system of control of the combined heating of the greenhouse in conditions of the covered area based on the microcontroller Raspberry Pi

The basis of the modern climate control systems is the principle of PI-control, in which the control system is always striving to reach a steady state with the help of effects on the controlling elements and measurements of withstand values (air and soil temperature, specific humidity, carbon dioxide concentration, lighting intensity), but taking into account the accumulated integral compensation errors. When maintaining the optimal microclimate in the greenhouse for a successful generative development of plants, the important parameters are air and soil temperatures. The purpose of the study is to give a rational explanation for the choice of the parameters of the equipment to create a model of control of the combined heating of the greenhouses for growing plants indoors. The calculations of the heat consumption of the systems of indoor growing were made; different types of options for heating greenhouses were specified. According to the results of the calculations, for small and medium-sized systems of growing vegetables in greenhouses the best option is a combined heating. To control the system single board computer is taken, a control block diagram is built. The computer supports the development environment based on the language Python, works with protocols Ethernet and can be remotely controlled. The mathematical model of the control system of the combined heating that includes a greater number of parameters is developed. For the complex automated system, it is also necessary to take into account humidity and artificial lighting in the greenhouse.