《基于AT89C51单片机的建筑塔钟的设计》-毕业论文（设计）.doc

PAGE 第PAGE 30页 辽宁科技大学本科生毕业设计 建筑塔钟设计 摘要 随着现代城建的发展，在大中城市的中心建筑上安置塔钟已越来越常见。塔钟控制系统的核心部件是步进电机，早期的步进电机驱动电路多采用分立元件或CMOS集成电路的构成,电路复杂，成本高，抗干扰能力弱，适应温度范围窄，在各种恶劣环境下不能确保可靠地工作。走时调整及调整显示也往往采用机械的方法，不仅调整困难，而且显示也不够直观方便。这些建筑钟所使用的电机容易出现误触发而快走，因为步距太大产生失步故障，解决上述问题的方法之一是采用小步距角高频率驱动的步进电机，并用单片机加以控制。其后出现的以微电脑为核心的步进控制器有取代逻辑控制器的趋势，本设计的目的就是利用AT89C51系列单片机所开发的塔钟控制系统来实现整点报时，断电后启用备用电源记录时间，恢复供电后快速调节正确时间等功能。本塔钟系统具有更高的精准性，更高的抗干扰能力，性价比高，通用性强等优点。 关键词：塔钟；步进式电机；单片机 Building tower clock design Abstract Along with the development of modern city building, in the center of the large and medium-sized cities on the building has become more and more common for tower clock. Tower clock control system is the core component of stepping motor, early stepping motor driver circuit used more division components or CMOS integrated circuit structure, circuit complex, high cost, weak anti-interference ability, adapt to temperature narrow range, in various harsh environment cant ensure working reliably. When the adjustment and adjust the display also often use of mechanical method, not only hard to adjust, and show also not enough intuitive convenient. These buildings used by the clock motor are easy to be triggered by mistake, because go quick step distance is too big produce out-of-step fault, one of the ways to solve the above problem is to use small step from the Angle of high frequency drive stepping motor, and single-chip microcomputer controlled. Thereafter appear microcomputer as the core of the stepping controller have replaced the logic controller design, the purpose of this trend is the use AT89C51 single chip series of development the tower clock control system to realize the hour, when the power is enabled backup power supply for the record time, restore power quickly after adjusting the correct time etc. Function. The tower clock system has higher precision, higher anti-disturbance capacity, high performance/price ratio, versatility, etc. Keywords: tower clock，Stepping type electrical engineering，micro