Design And Implementation Of The Advanced Automatic Door Controller

With the development of economy and living standard, automatic doors are being widely used. It is absolutely necessary to a modern building such as hotel, supermarket. As the controlling core of the automatic door, the automatic door controller determines its performance. Most of automatic door controllers that have been sold in our country are made by foreign manufactures. The performance of these products is high, but they are very expensive. Our home-made automatic door controllers are not so expensive, however, the performance is unsatisfied and the faulty rate is high. So we have developed a new kind of automatic door controller based on MC68HC11K1. The controller has good competitive ability because it's powerful, reliable, convenient and low-cost. MC68HC11K1 is an enhanced 8-bit MCU (Microcontroller unit) which is powerful, cheap. It has been widely used in many industry controlling fields because of its excellent anti-interference feature. It's very suitable to use MC68HC11K1 as the core unit of automatic door controller and so we did choose it. Another feature of our solution is the use of CPLD. CPLD is used to control the signals to stepper motor and it has brought up many merits, such as low-cost, high-reliability, flexibility and short time-to-market. In addtion, we have designed efficient faulty monitoring circuit to improve the reliability of the controller.