A Study of Fabrication of RF Control System for Building Sunshade

This paper is based on the fabrication of wireless control system for the building shading device. RF Module was controlled by UHF wireless CC1020 chip which has low electrical power and low electrical voltage. Also 447.8625?447.9875 frequency, 4800Baud data rate and 12.5 kHz channel spacing was controlled by the use of SPDT switch and with Microcontroller program. Furthermore, the helical antenna was used. The starting production of 447.8625?447.9875 kHz wireless electrical power was used. As the result, it did not exceed 10dBm which is the standard of low power wireless system. Shading efficiency was measured at 25%, 50%, 75% direction with controlling the interior temperature and the intensity of illumination at the rate of 1 hour. As the result, the intensity of illumination was lowered to 82~87% at 25% direction with 0.6~1.4℃ lowered temperature. At 50% direction, the intensity of illumination was lowered to 60~68% with 2.3~4.1℃ lowered temperature. And at 75% direction, the intensity of illumination was lowered to 41~47% with 3.4~5.1℃ lowered temperature.