设计说明书
总字数：20000+
摘要
随着出行频率的提升和智能化需求的增长，行李箱的安全防护、状态监测及便捷操控成为人们关注的重要方向。传统行李箱存在重量难预估、定位缺失、易丢失及开锁方式单一等问题，可能给出行带来不便甚至财产损失，因此研发一款集多功能于一体的智能行李箱具有重要现实意义。
本设计提出一种基于 STM32F103C8T6 单片机的智能行李箱。系统核心功能包括：通过 HX711 重量检测模块获取行李箱重量数据，并借助 ESP8266 – 12F WIFI 模块将数据发送至手机 APP 实时显示；利用 ATGM332D – 5N GPS 模块采集行李箱经纬度信息，用户通过手机 APP 可一键获取位置；支持手机 APP 远程触发声光报警，便于快速定位行李箱；开锁方式采用矩阵键盘密码开锁与手机 APP 一键开锁（通过继电器模拟开锁动作），密码可修改且存储于 AT24C02 存储模块实现掉电保存；通过 ECB02 蓝牙模块与手机端微信小程序建立连接，当超出连接范围时，行李箱自动启动声光报警以防止丢失，同时手机端实时显示行李箱连接状态；此外，系统通过 OLED 显示屏直观展示重量、定位等检测参数及相关阈值信息。
该智能行李箱为用户出行提供了便捷、安全的解决方案，通过多维度的状态监测、灵活的操控方式及可靠的安全防护，有效提升了出行的便利性与安全性，改善了用户的出行体验。
关键词：STM32F103C8T6；智能行李箱；重量检测；GPS 定位；蓝牙防丢；远程操控
Abstract
With the increase in travel frequency and the growing demand for intelligence, the safety protection, status monitoring, and convenient operation of luggage have become important directions of concern for people. Traditional luggage has problems such as difficult weight estimation, missing positioning, easy loss, and a single unlocking method, which may cause inconvenience and even property damage to travel. Therefore, developing a multifunctional intelligent luggage has important practical significance.
This design proposes an intelligent luggage compartment based on STM32F103C8T6 microcontroller. The core functions of the system include: obtaining luggage weight data through the HX711 weight detection module, and using the ESP8266-12F WIFI module to send the data to the mobile APP for real-time display; Using the ATGM332D-5N GPS module to collect luggage latitude and longitude information, users can easily obtain their location with just one click through a mobile app; Support remote triggering of sound and light alarms through mobile apps, making it easy to quickly locate luggage; The unlocking method adopts matrix keyboard password unlocking and one click unlocking through mobile APP (simulating unlocking action through relay). The password can be modified and stored in the AT24C02 storage module for power-off saving; Establish a connection with the WeChat mini program on the mobile phone through the ECB02 Bluetooth module. When the connection range is exceeded, the luggage will automatically activate an audible and visual alarm to prevent loss, and the mobile phone will display the luggage connection status in real time; In addition, the system visually displays detection parameters such as weight and positioning, as well as related threshold information, through an OLED display screen.
This smart luggage provides users with a convenient and safe solution for travel. Through multi-dimensional status monitoring, flexible control methods, and reliable safety protection, it effectively enhances the convenience and safety of travel, and improves the user’s travel experience.
Keywords：STM32F103C8T6; Smart luggage; Weight testing; GPS positioning; Bluetooth anti loss; remote control.
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 重量检测模块电路设计
3.4 GPS 定位模块电路设计
3.5 无线通信模块电路设计
3.6 显示模块电路设计
3.7 按键与开锁模块电路设计
3.8 声光报警模块电路设计
3.9 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 矩阵键盘子流程
4.4 存储模块子流程
4.5 称重模块HX711模块子流程
4.6 蓝牙模块子流程
4.7 WiFi模块子流程设计
5 实物制作与功能测试
5.1 实物制作
5.2 重量监测与 WIFI 数据传输功能测试
5.3 GPS 定位与 APP 位置查看功能测试
5.4 声光报警功能测试
5.5 智能开锁与密码存储功能测试
5.6 OLED 显示与状态同步功能测试
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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