便携式储粮二氧化碳红外检测系统研制

Development of Portable Grain Storage Carbon Dioxide Infrared Detection System

摘要: 针对粮食在储藏过程中的发热、虫霉危害等现象，研制了一款便携式储粮二氧化碳红外自动检测系统，通过对温度、湿度、二氧化碳浓度三个主要环境因素进行检测，基于生物代谢的基本原理以及储粮生物危害判断模型，实现对储粮过程中粮食霉变发热的早期检测和预报。使用SHT11温湿度传感器和T6615-50K型红外二氧化碳传感器来检测温湿度和二氧化碳浓度；采用LabVIEW编程实现上位机人机交互界面的软件设计，可实现参数设置、发送指令及接收数据；采用C语言编程实现下位机控制器的程序设计，用来接收指令、控制各部件工作运转及数据传输。上位机软件和下位机控制器采用RS485串口通讯模块进行通讯。测试结果表明，本系统具有较高的检测精度，较短的检测时间以及较为准确的粮食评定结果，同时结合三维曲面模型，更为全面地指导粮库粮食的安全管理。

Abstract: Aiming at the phenomenon of heat generation and pest and mildew damage in the process of grain storage, a portable infrared automatic detection system for grain storage carbon dioxide has been developed. By detecting the three main environmental factors of temperature, humidity and carbon dioxide concentration, based on the basic principle of biological metabolism and the judgment model of stored grain biohazard, the early detection and prediction of grain mildew and fever dur-ing grain storage are realized. Use SHT11 temperature and humidity sensor and T6615-50K infra-red carbon dioxide sensor to detect temperature, humidity and carbon dioxide concentration; use LabVIEW programming to realize the software design of the upper computer man-machine inter-face, which can realize parameter setting, send instructions and receive data; use C language pro-gramming Realize the programming of the lower computer controller, which is used to receive in-structions, control the operation and data transmission of various components. The upper computer software and the lower computer controller use the RS485 serial communication module to com-municate. The test results show that the system has higher detection accuracy, shorter detection time and more accurate grain evaluation results. At the same time, combined with the three-dimensional surface model, it can guide the grain safety management of grain depots more comprehensively.