本科论文（设计）LED智能调光控制器的设计与实现.docVIP

LED智能调光控制器的设计与实现 摘要 LED灯具有节能、可靠性也高等这些特性逐渐表现出来。LED是冷光源的发光器件，光效很高，工作电压较低，使用寿命很长。用LED灯替代其他照明工具，节能没有污染，使用安全，可靠性很高，便于维护。 本项目设计是先利用光敏电阻对人员所在环境的光照强弱进行采样，把采集到的信号转换为电压信号，利用A/D转换把模拟信号转换为数字信号，然后再传送给单片机，利用软件把得到的信号经过进一步的处理，转换为脉冲宽度输出，因而来控制台灯的亮度。 本方案的主要难点在于光照强度的采集和亮度的控制。光照采集我们没有采用现成的传感器，而是采用了光敏电阻+AD的方式进行解决，为了减小方案的复杂度，我们没有采用专门的AD芯片进行AD转换，而是采用STC12C5A这款自带AD的51单片机进行AD转换，减小了方案的复杂度，另一方面，光敏电阻的位置对于光照强度采集影响很大，既不能让台灯光源对他进行影响，也不能放太阴暗的地方影响光照的采集，为了解决这个问题，我们采用了两个光敏电阻进行两路AD进行对比的方式予以解决。台灯亮度控制则是另一个难点，我采用了上网购买现成的USB台灯进行改装的方式提供灯源，使用三极管自己搭建放大电路对台灯进行供电，这种方式比起控制交流电驱动的灯泡以及自己制作光源无疑从成本还是难度以及控制方式上，都是最有效、最可靠的方式。 关键词：Design & Implementation of Intelligent LED Dimming Controller Abstract In And in today's society, people are increasingly demanding high quality of life, loss of lighting in the energy sector is also growing, so the energy savings are even more important. LED lamps are energy saving, higher reliability of these features gradually manifested. LED is cold light emitting device, high efficiency, low operating voltage, long life. Alternative to other lighting tools with LED lights, energy saving no pollution, safe, high reliability, ease of maintenance. The project design is to use photosensitive resistance to light intensity environment where staff are sampled to convert the collected signals to a voltage signal, the use of A / D converters to convert analog signals to digital signals, and then sent to the microcontroller, using the software the signal obtained after further processing, is converted to a pulse width of the output, thereby to control the brightness of lamp. The program is designed to difficulty collecting light intensity and brightness controls. Light collected using a photosensitive resistance +AD way to solve, in order to reduce the complexity of the program, using STC12C5A this comes MCU AD 51 AD converter, reducing the complexity of the scheme, on the other hand, photoresistor location for collecting light intensity greatly affected, neither let the light