基于AT89S51单片机的以HS1101作为前端湿敏元件的室内湿.doc

摘要 关键词： Abstract With the social development of information science, control theory and electronic technology has been updated too, based on the micro-controller, the technology of highly intelligent micro-controller monitoring has gradually become a reality. Among them, single-chip digital controller as the core because of their small size, low cost, powerful, simple and widely used. Indoor humidity measurement and controlling has been growing importance because of the prominent and the more and more mature technology. This article focused on a single chip AT89S51 based HS1101 humidity sensor as a front-end indoor humidity detection system. The system has a hierarchical, modular design, and uses HS1101 humidity sensor chip as a measurement device. The data obtained after treatment NE555 oscillator circuit through the ADC0809 AD converter connecting to the AT89S51 micro-controller, a single machine as the core of the data record, storage, processing and alarm. In this paper, the main job of the design is the following points: First, to discuss the overall design and program so to select the appropriate system; Second, design and selection of the sensor, A / D converter, and a single-chip; third is a Micro Controller Unit to communicate with the PC interface and software systems for circuit design. The design of the system is still in the theoretical stage, and it is to demonstrate a variety of programs and collected information on the various proposed a practical indoor humidity monitoring systems. Satisfy the system of small laboratory humidity measurement and control system requirements, the indoor humidity has been to achieve the status of a comprehensive, real-time and long-term monitoring, and also make the indoor humidity intelligent and automated testing to come true. Keywords: AT89S51; HS1101; AD converter; RS-232; sensor 目 录第一章 前言 5 1.1 概述 5 1.2 实验室湿度测控的意义 5 1.3 实验室湿度测控的现状与发展 6 1.3.1 传统的分立式湿度测量 6 1.3.2 模拟集成湿度传感器测量 6 1.3.3 智能湿度传感器测量 6 1.4 本课题的设计方案 7 第二章