设计说明书
总字数：14000+
摘要
随着公众对健康管理重视程度的不断提升，体温作为反映人体健康状态的关键生理指标，其便捷、精准的监测需求日益凸显。无论是日常健康监测，还是特殊场景下的体温筛查，一款高效可靠的体温监测设备都具有重要意义。因此，研发一种操作简便、测量精准的智能体温表十分必要。
本设计提出了一种基于 STC89C52 单片机的智能体温表。系统主要功能包括：通过 MLX90614 红外测温模块精准测量人体温度值；借助红外避障模块检测人手是否放置在测温模块上，当检测到人手后自动开启测温流程，测温完成 3s 后蜂鸣器报警 1s 以提醒用户；通过 LCD1602 显示屏清晰展示上次测量数据和本次测量数据，方便用户对比查看；同时，系统通过 AT24C02 模块对测量的体温值进行存储，确保历史数据可追溯。
该智能体温表的作用在于，为人们提供了一种便捷、精准的体温监测工具。通过自动化的测温触发、清晰的数据显示以及可靠的历史数据存储，能够帮助用户快速获取体温信息，及时掌握自身健康状况，为健康管理提供有力支持，进一步提升生活健康保障水平。
关键词：STC89C52 单片机；智能体温表；MLX90614 红外测温；AT24C02 数据存储
Abstract
With the increasing public emphasis on health management, body temperature, as a key physiological indicator reflecting human health status, has seen a growing demand for convenient and accurate monitoring. Whether for daily health monitoring or temperature screening in special scenarios, an efficient and reliable body temperature monitoring device is of great significance. Therefore, developing an intelligent thermometer with simple operation and precise measurement is highly necessary.
This design proposes an intelligent thermometer based on the STC89C52 microcontroller. The system’s main functions include: accurately measuring human body temperature through the MLX90614 infrared temperature module; detecting whether a hand is placed on the temperature measurement module via an infrared obstacle avoidance module, and automatically initiating the temperature measurement process upon detection. After completing the measurement, the buzzer sounds for 1 second as an alert 3 seconds later to notify the user; displaying the previous measurement data and the current measurement data clearly on the LCD1602 screen for easy comparison and viewing; and storing the measured temperature values via the AT24C02 module to ensure traceability of historical data.
The function of this smart thermometer is to provide people with a convenient and accurate tool for body temperature monitoring. Through automated temperature measurement triggering, clear data display, and reliable historical data storage, it enables users to quickly obtain temperature information, promptly monitor their health status, offer strong support for health management, and further enhance the level of health protection in daily life.
Keywords： STC89C52 microcontroller; intelligent thermometer; MLX90614 infrared temperature measurement; AT24C02 data storage
目 录
1 绪论
1.1 研究背景及意义
1.2 国内外研究现状
1.3 主要内容
2 系统总体方案设计
2.1系统总体设计
2.2 主要模块方案选择
3 系统硬件设计
3.1 总体硬件框架
3.2 主控模块电路设计
3.3 温度检测模块电路设计
3.4 人体感应模块电路设计
3.5 显示模块电路设计
3.6 蜂鸣器模块电路设计
3.7 存储模块电路设计
4 系统程序设计
4.1 编程软件介绍
4.2 系统主流程设计
4.3 红外测温模块子流程设计
4.4 红外避障模块子流程设计
4.5 存储模块子流程
4.6 蜂鸣器报警模块子流程设计
4.7 LCD1602液晶显示子流程
5 实物制作与功能测试
5.1 实物制作
5.2 测温与显示功能测试
5.3 蜂鸣器提醒功能测试
5.4 存储与数据追溯功能测试
6 总结
参考文献
致谢
附录A 原理图
附录B PCB
附录C 主程序
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