体温计毕业设计.doc

摘 要 本智能体温计采用AT89S52作为核心器件实现对系统进行控制，采用双单片机串行处理结构。体温由AD590集成温度传感器采集，温度变化转换为线性电压信号，再经由OP07构成高精度低温漂的放大电路处理后，作为ADC0809的模拟输入信号，由ADC0809完成A／D转换，得到8位的数字信号送入单片机1（AT89S52）。单片机1将采集到温度值在LED数码管上显示出来，也通过串口通信将温度信号传到单片2（AT89S52）。此外报警温度由单片机1预制，报警电路模块功能也由单片机1完成。单片机2完成温度值的语音播放功能。通过系统的设计与实现说明本设计方案切实可以，能够完成题目所要求的基本功能部分，并留有相应的接口，为完成扩展功能打下基础。 关键字：体温计 单片机 温度采集 A/D转换 语音播放 Abstract: This intelligent clinical thermometer uses AT89S52 to realize as the core component to systems automatic control, uses the double monolithic integrated circuit serial processing structure. The open air temperature after AD590 integration temperature sensor gathering, the temperature change transforms into the linear voltage signal, again amplifying circuit processing which floats after the OP07 constitution high accuracy low temperature, takes ADC0809 the simulator input, completes A/D by ADC0809 to transform, obtains 8 digital signals to send in the monolithic integrated circuit 1 (AT89S52). The monolithic integrated circuit 1 will gather the temperature value on the LED nixietube to demonstrate that also passes to through the serial port correspondence the temperature signal monolithic 2 (AT89S52). In addition the temperature prefabrication, the alarm circuit module function also 1 completes by the monolithic integrated circuit. The monolithic integrated circuit 2 complete the temperature value the pronunciation broadcast function. With realizes through systems design showed that this design proposal practical may, be able to complete the basic function part which the topic requests, and leaves leeway the corresponding connection, to complete the extended function to build the foundation. Key words: Clinical thermometer Single Chip MicroComputer Temperature gathering A/D transformation Pronunciation broadcast 目 录 一、绪 论 3 二、主要模块的方案论证与比较 4 2.1 温度传感器的选择 4 2.2 A／D转换器的选择 4 2.3 语音提示模块 5 2.4 总系统设计方案 5 三、主要电路设计与参数计算 7 3.1 电源电路模块 7 3.2 温度检测与信号调理模块 7 3.3 A/D转换模块 9 3.4 按键预制、显示及报警电路模块 10