| 摘要 |
PURPOSE: An electric shutter opening/closing device is provided to ensure safety and convenient use in a narrow and low space since a limit switch system is realized so that the absolute position of a shutter can be sensed. CONSTITUTION: An electric shutter opening/closing device comprises a rotating gear, a counter rotating gear, a counter(200) and an infrared sensor. The counter is connected to the rotating gear and the counter rotating gear. White or black band graph tuned to 1 and 0 is attached to the outer surface of a unit-based cylindrical rotating body of the counter, in multi-stage. The infrared sensor reads color. A rear gear rotates as many as 360/2n while the rotating body rotates once. The current position of a shutter is transmitted to a control room through microprocessor. |
