光敏电阻传感器训论文.doc

编号： 传感器综合设计 实训 论文 说明书 题 目： 光敏电阻测量光照强度 院 （系）： 信息与通信学院 专 业： 电子信息工程 学生姓名： 罗振雄 学 号： 0座机电话号码1 指导教师：王守华、胡机秀、童有为、李秀东 2012年6月22日摘 要 随着时代的进步和发展，技术已经普及到我们生活，工作，科研，各个领域，已经成为一种比较成熟的技术传感器是将感受的物理量、化学量等信息，按一定规律转换成便于测量和传输的信号的装置。Abstract With the progress and development of sensor technology has spread to the way we live, work, research in various fields, has become a relatively mature technology. The sensors are the feelings of physical, chemical and other information, according to certain rules to convert to facilitate the measurement and transmission of the signal device. This design is entitled to the photoresistor to measure light intensity, the strength of the light to change the photosensitive resistor size, so that the output voltage changes, by measuring the size of the output voltage value can be indirectly measuring the light intensity. The design of the light intensity alarm control system and the light intensity level display circuit and illumination brightness of the display. This design uses the STC microcontroller-based control circuit, digital display light intensity, light green, yellow, red LED display brightness levels, to do with buzzer alarm circuit. The design of the circuit design principles and functions of various parts of the circuit can achieve, requiring a variety of basic electronic components, resistors, capacitors, diodes, transistors and other familiar and master the use of Proteus simulation software Protel 99 SE software tools such as mapping software and use of them. AD of the internal microcontroller to convert analog into digital, programmed to control the various peripheral circuits and to achieve its function. The design of the circuit is simple, compact, low cost, superior performance characteristics. Key words：Light intensity; photosensitive resistance; MCU 目 录 引言 1 1 电路系统概述 1 1.1 设计要求 1 1.2 方案设计 1 1.3 方案论证 2 2 硬件设计与分析 3 2.1 单片机最小系统 3 2.2 光敏电阻的特性及参数 5 2.3 光采样电路 5 2.4 光强度显示电路 6 2.5 光强度等级报警电路 6 3 软件程序设计 7 3.1 程序流程图 7 3