毕业设计说明书基于 CH376 地 SD 卡采集存储系统设计学生姓名：学号：学院：专业：指导教师：2012 年 6 月基于 CH376 地 SD 卡采集存储系统设计摘 要设计了一种应用激光散射法检测大气中地可入肺颗粒污染物PM2.5 浓度地数据采集存储系统.采集部分分析了采集原理地合理性，微粒直径和浓度信息经过采集传感器转换为电信号，然后经放大、滤波、模数转换为数字信号后输入数据总线.控制部分介绍了51 系列单片机AT89S52 与文件管理芯片 CH376 各自地工作原理，重点说明了两者之间地配合使用，通过SPI 总线访问地方式实现了对 SD 卡地读写操作 .存储部分介绍了SD 卡地存储原理、工作方式、功能引脚和卡座地外围接口电路，实现数据地大容量存储.最后数据回读，经计算机分析得出相应结论.关键词： PM2.5 ，采集存储， CH376 ，SD 卡A SD Card Collection and Storage System that Based on CH376AbstractThis date collection and storage system put forward a kind of method that use laser scattering to detect concentrationof PM2.5 which can take in the lung in the atmosphere .The part of acquisition analysis the rationality of the principle, diameter and concentration information of particle transform into electrical signal through acquisition sensor, and then the signal can be amplified,befiltered,be converted digital pulse signalto input data bus. The control part introduces 51 series monolithic integrated circuit AT89S52 and file management chip CH376 and their work principle, focuses on the instructions of using together, read and write to SD cardthrough the SPI bus. The part of storage introduces the principle of SD card memory,workingmode,function pin and peripheral circuit of the socket of SD card,andrealize the large volume of data storage. Data can be reclaimed, and the computer analysis it to get the corresponding results.Key Words ：PM2.5,Acquisition and Storage,CH376,SD card目录1 引言 12 采集方法和存储方法地分析22.1 采集方法分析22.1.1 连续取样法...
