Auto-control device of blind curtain

The blind auto control system to save heating/cooling energy by auto-controlling the angle of the venetian blind slat according to the surrounding conditions, such as the exterior temperature of the building, insulation, interior illuminance, etc, and to save illuminating energy by auto-controlling the interior illuminators according to the brightness around the window is provided. The values measured by a pyheliometer(100), thermometer(200), and illuminometer(300) are converted by a digital converter and input to a computer(400). The data of an appropriate angle of the slat(730) and the illuminator-on/off calculated by the fuzzy reasoning of the computer are sent to the analog-digital converter(340). The converted data for controlling the illuminator is sent to the control switch(600) of the illuminator to turn on/off the illuminator. The converted data for adjusting the angle of the slat is sent to the stepping motor(500) through the motor driver(510) to adjust the direction and angle of the slat.