Building horizontal external shading angle regulation and control system based on PLC

Abstract

The invention discloses a building horizontal external shading angle regulation and control system based on a PLC. The system comprises an electric shading board, a PLC controller, a sensor component and an A/D converter. The sensor component acquires position signals, light signals, wind signals and rain and snow signals in real time and then converts analog signals into digital signals via the A/D converter and then transmits the digital signals to the PLC controller. The PLC controller sets the rotating tracks of the electric shading board according to change of the solar altitude angle and the azimuth of the latitude at which the shading board is positioned. The PLC controller performs logic signal processing according to the received real-time sensor signals and transmits control instructions to an electric motor via an output end. The electric motor rotates according to the output signals of the PLC controller so as to drive a wheel shaft and a pull rope to control change of the angle of the electric shading board. An automatic regulation and control function of the angle of the shading board changing according to time can be set according to the structural features and properties of a building and local sunlight conditions through programming of PLC internal programs with no requirement for artificial regulation.

Description

technical field [0001] The invention belongs to the field of building materials and solar energy, and in particular relates to a PLC-based system for regulating and controlling the angle of building horizontal external shading. Background technique [0002] Energy-saving buildings started early in developed countries in Europe. The main measures are: improving the thermal insulation performance of building structures, adopting energy-saving equipment, and maximizing the use of natural energy. Among them, the natural energy is mainly solar energy, and the utilization of solar energy is mainly reflected in the sunshade system of the building. After years of practice and development, developed countries in Europe have developed many sunshade products with different forms and characteristics: [0003] (1) The strip-shaped sunshade can be fixed according to the sunshine conditions in different regions and the requirements of different parts of the building. By choosing keels wit...

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Problems solved by technology

[0009] At present, the shading angle of most buildings is controlled by the management personnel themselves. If the indoor comfort cannot be achieved, corresponding measures are taken immediately. This artificial control method has the disadvantages of high work intensity for the management personnel and the inability to monitor in real time. The value of specific environmental conditions, and then corresponding measures cannot be taken immediately, for example, the sun visor cannot be closed in time when it rains, and the sun visor cannot be opened in time when it is cloudy, etc. These will indirectly affect the working and living environment of the personnel inside the building.

[0010] Therefore, these control methods mainly have the following defects: (1) the level of automation is not high, which reduces people's quality of life; (2) cannot be linked with other systems in the building, and network control cannot be realized; (3) the incident sunlight is not well controlled. control

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