《基于湿敏电阻的湿度检测》-毕业论文.doc

精品 精品 摘 要 随着科学研究、工业和家用电器等方面对测湿和湿度控制的需要，各种新型的利用湿度传感器的测湿电路不断被研制出来。 本系统是基于芯片ICL7107的室内温湿度检测和显示系统。以硬件设计为主要内容，系统组成为信号采集电路，经过运放LM358放大送入芯片7107模数转换电路，LED显示电路和电源电路。主要应用是采集环境的湿度，并显示出来。数码管显示亮度等级，实现10个等级的亮度显示，10个等级的线性度较好，实现亮度等级达到100级，100个等级线性度良好，带有调光和检测功能。 关键词： 湿敏电阻，ICL7107，LM358，LED数码管显示 Abstract With scientific research, industry and household appliances in aspects of moisture and humidity control, all kinds of new use of humidity sensors humidity measurement circuit has been developed. This system is based on the indoor temperature and humidity ICL7107 chip detection and display system. In the hardware design as the main content, system composition for signal acquisition circuit, through the op-amp LM358 amplifier into 7107 adc chip, LED display circuit and power circuit. Main applications are collecting environmental humidity, and displayed. Digital display displaybeleuchtung auf, tube 10 levels of brightness, 10 levels of good linearity and realize displaybeleuchtung auf achieves 100, 100 levels, with good linearity dimmer and function. Keywords: wet sensitive resistors, ICL7107，LM358, LED digital display 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc266513713 引言 PAGEREF _Toc266513713 \h 1 HYPERLINK \l _Toc266513714 1 方案设计 PAGEREF _Toc266513714 \h 2 HYPERLINK \l _Toc266513715 2 传感器简介 PAGEREF _Toc266513715 \h 2 HYPERLINK \l _Toc266513716 2.1 传感器的定义与分类 PAGEREF _Toc266513716 \h 2 HYPERLINK \l _Toc266513717 2.1.1传感器的定义 PAGEREF _Toc266513717 \h 2 HYPERLINK \l _Toc266513718 2.1.2传感器的分类 PAGEREF _Toc266513718 \h 2 HYPERLINK \l _Toc266513719 2.2 传感器的技术特点 PAGEREF _Toc266513719 \h 3 HYPERLINK \l _Toc266513720 3湿敏电阻 PAGEREF _Toc266513720 \h 3 HYPERLINK \l _Toc266513721 4 LM358芯片介绍 PAGEREF _Toc266513721 \h 4 HYPERLINK \l _Toc266513722 4.1 LM358概述 PAGEREF _Toc266513722 \h 4 HYPERLINK \l _Toc266513723 4.2 LM358特性 PAGEREF _Toc266513723 \h 4 HYPERLINK \l _Toc266513724 5 ICL717 简介 PAGEREF _Toc266513724 \h 4 HYPERLINK \l _Toc266513725 5.1 31/2位双积分型A/D转换器ICL7107