一种微波干燥控制系统的设计  

Design of a Microwave Drying Control System

作　　者：倪乘阳 徐欧官[1] 李臻锋 Ni Chengyang;Xu Ouguan;Li Zhenfeng(Zhijiang College,Zhejiang University of Technology,Shaoxing 312030,China;School of Mechanical Engineering,Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Wuxi 214122,China)

机构地区：[1]浙江工业大学之江学院,浙江绍兴312030 [2]江南大学机械工程学院江苏省食品先进制造装备重点实验室,江苏无锡214122

出　　处：《计算机测量与控制》2020年第12期253-257,共5页Computer Measurement &Control

基　　金：浙江省自然科学基金项目(Y17F030059);江苏省食品先进制造装备技术重点实验室开放课题(FM-201603)。

摘　　要：设计了一种适用于果蔬等农产品微波干燥的反馈控制系统;论述了系统的实现原理及其功能模块,探讨了系统的硬件和软件的设计思路和实现方法;硬件部分包括微波干燥单元、温度检测与控制单元、重量检测单元和上位机控制单元等;软件部分主要为LabVIEW控制程序;完成系统的搭建以后,应用纯净水加热实验对改造后的家用微波炉的输出功率进行标定,基于实验数据建立了微波功率与控制电压间的数学模型;以生姜为样本开展恒温干燥实验,发现温度反馈控制调整时间不超过1 s,温度控制精度为2℃;实验结果表明微波干燥系统可实时记录温度、重量等数据,能实现微波功率的连续、无级调节。A microwave drying feedback control system was designed for the purpose of the microwave drying for fruits and vegetables and other agricultural products.The realization principle and each function module of the system were discussed in detail.The design ideas and realization methods of the system hardware and software were investigated.The hardware of the system consists of microwave drying unit,temperature and power control unit,weight detection unit and upper computer control unit.The software of the system is LabVIEW control program.After the system was setup,the power of a reconstructed home microwave oven was calibrated by a water heating experiment.The mathematical model between microwave power and voltage of the power control circuit was established based on the experiment data.Constant temperature drying experiment was carried out with ginger as sample.The temperature feedback control adjustment time was under 1 second and the temperature control precision was up to 2℃during the experiment.The experiment results showed that the system could record temperature,weight and other data in real time.It was also showed that the microwave power can be adjusted continuously and steplessly based on temperature feedback control.

关 键 词：微波干燥 控制系统 微波功率 反馈控制 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]