CAJ | 학술논문

果蔬真空冷冻干燥技术的应用推广,进行低能耗冻干工艺优化具有着重要意义.果蔬冻干工艺优化中关键技术是果蔬冻干水分的在线监测,笔者对此进行了广泛深入的探索;介绍了基于介电方法的果蔬冻干水分无线实时监测系统的设计,基本思路是:无线采集果蔬冻干过程的相对介电常数,利用实验测取的果蔬介电常数与冻干过程的含水率相关关系,实现果蔬冻干过程含水率在线检测;在冻干仓内利用集成电容转换芯片对插入果蔬内部的电极探针间电容进行采样,经过ZigBee收发芯片无线采集测量结果,并通过上机软件将电容测量值转换为相对介电常数;在不同温度下对传感器进行校准,保证在冻干仓内加热温度下介电常数的在线精确测量.同时,以苹果和土豆为试材的试验验证,结果表明:含水率与相对介电常数有极显著的线性正相关性,无线在线检测果蔬冻干过程含水率可行.
과소진공냉동간조기술적응용추엄,진행저능모동간공예우화구유착중요의의.과소동간공예우화중관건기술시과소동간수분적재선감측,필자대차진행료엄범심입적탐색;개소료기우개전방법적과소동간수분무선실시감측계통적설계,기본사로시:무선채집과소동간과정적상대개전상수,이용실험측취적과소개전상수여동간과정적함수솔상관관계,실현과소동간과정함수솔재선검측;재동간창내이용집성전용전환심편대삽입과소내부적전겁탐침간전용진행채양,경과ZigBee수발심편무선채집측량결과,병통과상궤연건장전용측량치전환위상대개전상수;재불동온도하대전감기진행교준,보증재동간창내가열온도하개전상수적재선정학측량.동시,이평과화토두위시재적시험험증,결과표명:함수솔여상대개전상수유겁현저적선성정상관성,무선재선검측과소동간과정함수솔가행.
Real-time monitoring of the moisture content of fruits and vegetables in vacuum freeze -drying process, this can provide technical support for the freeze-drying process monitoring and optimization.In order to investigate the way based on relative dielectric constant monitor the moisture content, this paper designed a wireless and real-time monitoring system which can realize relative dielectric constant acquisition, calculation and storage, it can also draw the change curve of the relative dielectric of material.The test uses apple and potato as test material to validate moisture content and relative dielectric constant has an illustrious linear correlation.Experiment has built correlation association models based on relative dielectric constant and moisture content.Therefore, moisture content of fruit and vegetables can be monitored based on its relative dielectric constant.