基于STM32的小麦籽粒含水率在线检测系统设计  

Design of Online Detection System of Wheat Grain Moisture Content Based on STM32

作　　者：姬虹[1,2] 李康 宋东方 王万章[2] 李保谦 冯伟[2] Ji Hong;Li Kang;Song Dongfang;Wang Wanzhang;Li Baoqian;Feng Wei(Henan Polytechhnic,Zhengzhou 450046,China;College of Mechanical Engineering,Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]河南职业技术学院,郑州450046 [2]河南农业大学机电工程学院,郑州450002

出　　处：《农机化研究》2025年第5期94-101,共8页Journal of Agricultural Mechanization Research

基　　金：中央引导地方科技发展资金项目(Z20221341068);郑州市科技惠民计划项目(2022KJHM0045);河南省科技厅科技攻关项目(242102110359);河南省科技厅重点软科学项目(242400411017)。

摘　　要：为满足联合收获机小麦含水率在线检测需求,设计了一种基于STM32的小麦籽粒含水率在线检测系统。该系统使用STM32F103RCT6嵌入式芯片作为硬件开发平台,采用同侧圆弧电容式含水率检测传感器作为采集终端,经过电路与STM32单片机处理后,将RS485采集的数据通过4G发送到云服务器进行数据交互的M2M双向数据传输设备,实现串口设备的无线长距离数据传输,进而实现远程数据通信管理,具有良好的人机交互性。台架验证试验结果表明:性能可靠,检测含水率最大绝对误差为0.87%,最小绝对误差为0.07%,其平均绝对误差为0.29%,相对误差值均小于10%,平均相对误差为4.7%,系统含水率检测值与实际含水率检测值拟合,R^(2)=0.9685能够满足联合收获机谷物含水率在线检测要求。In order to meet the requirements of online detection of wheat moisture content in combine harvester,an online detection system of wheat grain moisture content based on STM32 was designed.The detection system used the STM32F103RCT6 embedded chip as the hardware development platform,and used the ipsilateral circular arc capacitive moisture content detection sensor as the acquisition terminal.After the circuit was processed with the STM32 microcontroller,the data collected by RS485 was sent to the cloud server through 4G for data interaction.It realized wireless long-distance data transmission of serial port devices,and then realized remote data communication management,with good man-machine interaction.The results of the bench verification test showed that:the maximum absolute error of moisture content detection was 0.87%,the minimum absolute error was 0.07%,and the average absolute error was 0.29%.The relative error values were all less than 10%,and the average relative error was 4.7%,R^(2)=0.9685,which could meet the requirements of online detection of grain moisture content of the combine harvester.

关 键 词：小麦籽粒 联合收获机 含水率 在线检测 STM32 同侧圆弧电容器 

分 类 号：S225.39[农业科学—农业机械化工程]