数据采集单片机数据采集24

摘  要 数据采集技术已经从一种应用有限的技术发展为可适用于各种高性能测量应用的平台。随着计算机技术的发展，在工业生产中自动检测与控制系统都离不开数据采集与信号处理，它是这些系统最初最原始数据的来源，数据采集技术是信息科学的一个重要分支，广泛应用于信号监控处理、通信、测量、制造、自动控制等现代电子信息实时监控处理工程。 随着计算机技术的发展，基于计算机的数据采集系统得到广泛应用。与模拟系统相比，数字系统具有精度高、稳定性好等优点。外部被测量压力为模拟量，因此要将压力模拟信号转换为便于处理和存储的数字信号，外部流量为模拟量，因此也应该转换为数字量，外部温度量也是模拟量，因此也需要相应的传感器转换成单片机可以识别的数字量。 本系统从实用角度出发，设计了一款可以检测外部压力，流量，和温度的装置，通过多路模拟开关切换以减少AD的使用，大大降低了系统的成本，同时将采集到的数据进行数字滤波处理后在液晶上显示。系统具有很高的实用价值。   关键字： 单片机，数据采集，数字滤波   Abstract Data collection technology has gone from an application of the technology development limited for can be applicable to all kinds of high performance measurement application platform. With the development of computer technology, in industrial production in automatic detection and control systems is inseparable from the data acquisition and signal processing, it is these system initially the most primitive data sources, data collection technology is an important branch of information science, widely used in signal monitoring treatment, communication, measuring, manufacturing, automatic control and other modern electronic information real-time monitoring treatment engineering. With the development of computer technology, computer data acquisition system based on widely. Compared with simulation system, digital system has high accuracy, good stability, etc. External pressure for analog quantities is measured, so will convert pressure analog signals for processing and storage of digital signal, the external flow for analog quantities, so should also be converted to digital quantity, the external temperature quantity is also an analog, therefore also need corresponding sensor convert microcontroller can identify the digital quantity. This system from practical Angle, designed a paragraph can detect external pressure, and flow rate, and temperature devices, through multi-channel analog switch to reduce the use of AD, greatly reduce the cost of the system, and the data collected will be digital filtering processing in LCD display on after. System has high practical value. Key word:  microcontroller, data acquisition, digital filtering 目录 摘  要... 1 Abstract 2 一、引言... 3 二、主要芯片及技术介绍... 4 2.1 单片机简介及系统最小系统设计... 4 2.2 压力传感器与电路设计... 11 2.3 液体流量的测量... 15 2.4温度测量部分... 18 2.5 CD4051多路选择开关... 24 三、软件设计分析... 26 3.1 系统整体架构分析... 26 3.2 1602液晶显示模块... 28 致   谢... 29 参考文献... 30 附录一、整体电路图... 32 附录二、程序代码... 33 [来源：http://think58.com]