工厂模拟流水线计数器U17580.doc

渝州科技职业学院 应用电子专业专科毕业论文 论文题目 工厂模拟流水线计数器 学生姓名 学 号 班 级 指导教师 专 业 2008年10月  摘要 传感器在科学技术领域、工农业生产以及日常生活中发挥着越来越重要的作用。人类社会对传感器提出的越来越高的要求是传感器技术发展的强大动力。而现代们学技术突飞猛进则提供了坚强的后盾。 本电路的制作是根据生活的需要而设计出来的一种计数器。它适用于工厂生产流水线的计数和产品的包装等方面，具有成本低、灵敏度高和制作简单等特点。 系统主要是由12V的变压器,将220V的市电降为12V的安全电压经整流、虑波、7809稳压、输出+9V的直流电压,作为系统的供电电源。电路主要是通过电源来对各个小模块主控供电。由红外线传感器产生模拟信号，再通过NE555构成施密特触发器进行波形整形，信号在进入CD40110进行计数、译码、驱动数码管。最终通过数码管显示出来。在我们的现实生活当中不可能不断的计数下去，所以我们加锁存电路，锁住我们想要的数字。 关键字：电源、施密特触发器、整形、计数、译码、驱动、锁存。  ABSTRACT The abstract sensor in the science and technology domain, the industry and agriculture production as well as the daily life is playing the more and more vital role.The human society the more and more high request which proposed to the sensor is the sensor technological development formidable power.But the modern study technology progressed by leaps and bounds has provided the strong backing. This electric circuit manufacture is one kind of counter which needs to design according to the life.It is suitable for plant production assembly line counting and product aspects and so on packing, has the cost low, thesensitivity high and the manufacture simple and so on the characteristics. The system mainly is by the 12V transformer, the 220V city pressure decrease is the 12V safe voltage after the rectification, worry wave, 7809 constant voltages, outputs +9V the DC voltage, takes the system the electric power supply.The electric circuit mainly is comes through the power source to each small module master control power supply.Produces the simulated signal by the infrared sensor, again constitutes the Schmitt trigger through NE555 to carry on the wave shaping, the signal is entering CD40110 to carry on the counting, the decoding, theactuation nixietube.Finally demonstrates through the nixietube.Not the impossible unceasing counting to get down middle ours real life, therefore we lock save the electric circuit, locks in numeral which we want. Key words: The power source, the Schmit