文档介绍：摘要
此温湿度测量系统是基于单线式温度传感器DS18B20、电容式湿度传感器
单片机STC89C52 对温度湿度分别测量并通过液晶显示屏1602经行显示。温度传感器DS18B20是单线式,体积超小,硬件开消超低,抗干扰能力强,精度高,附加功能强的理想单片机温度传感器,可实时根据指令给出温度数据,可读性高。HS1101是电容式空气湿度传感器,在不同的湿度环境下呈现出不同的电容值,0%~100%RH湿度范围内,电容从162PF变化到200PF,误差误差为2%RH。可见其精度非常高,为了反映出其电容的变化,本系统采用555多谐震荡电路产生不同的频率,用于检测湿度。单片机采集到两个传感器给出的数据进行处理与计算,得出当前的温度与湿度并送给液晶屏显示。本系统具有可读性高,稳定性高,反应速度快,测量值准确的特点。
关键词:温湿度测量系统精度高速度快体积小
Abstract: The temperature and humidity measurement system is based on singleline type temperature sensor DS18B20, capacitive moisture sensorSCM STC89C52 for temperature humidity measurement and respectively by LCD display. The line 1602 Temperature sensor DS18B20 is singleline type, volume super-small, hardware KaiXiao ultra-low, strong anti-jamming capability, high precision, additional features strong ideal single-chip puter temperature sensor, real-time temperature data, depending on the directive given readable. HS1101 is capacitive sensor, air humidity in different humidity presents different capacitance, 0% ~ 100% RH humidity, within the scope of capacitance change to 200PF, from 162PF error for 2% RH error. e can see its precision is very high, in order to reflect the capacitance change, the system USES the 555 more harmonic concussion circuits produce different frequency, which is used to detect humidity. SCM acquisition to two sensor gives data processing and calculated, the current temperature and humidity and give the display on the LCD panel. This system has a readable, high stability, reaction speed, measured values exact characteristic.
Keywords: temperature and humidity measurement system high precision speed small volume
目录
1. 设计要求 2
2. 方案设计及论证 2
总体方案设计 2
系统主要单元的选择与论证 2
2
2
2
系统组成 3
3. 理论分析及计算 3
3
3
4. 系统电路设计 3
3
DS18B20温度检测模块和HS1101湿度检测模块电路设计 4
HS1101湿度检测传感器工作原理 4
DS18B20温度检测传感器工作原理 4
4
1602液晶显示模块电路设计 5
5. 系统软件设计 6
软件设计流程图 6
软件