果蔬热风干燥含水率在线测量装置设计与试验
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摘要
为了实现果蔬热风干燥的智能化控制,综合运用数学模型法与介电常数法,以IAP15W4K58S4型单片机为主控芯片,利用现有的高精度电容传感器AD7746,设计了基于MCU的果蔬热风干燥含水率在线测量装置。以鸡腿菇为研究对象,通过热风干燥试验,建立了可准确预测其热风干燥过程中含水率的数学模型和相对介电常数-含水率计算模型,并用程序语言将模型进行编码及编译并写入系统,实现了双模式测量。验证结果表明:该装置能准确测量鸡腿菇热风干燥过程中的含水率,测量结果相对误差小于3%。
In order to realize the intelligent control of hot-air drying of fruits and vegetables,in the paper,the methods of mathematical model and dielectric constant were combined to design an online measuring device for moisture content in hot air drying process of fruits and vegetables based on MCU, taking the advantage of Micro Controller Unit IAP15 W4 K58 S4,and high-precision capacitive sensor AD7746. Setting Coprinus comatus as the research object,through the hot-air drying experiment,the mathematical model and the relation between relative dielectric constant and moisture content were established,which could accurately calculate the moisture content during the hot-air drying process.The models were coded,compiled and written into the measuring system. The system realized dual-mode measurement. The experimental verification results show that the device can accurately measure the moisture content in hot air drying process of coprinus comatus,and the relative error of measurement results is less than 3%.
In order to realize the intelligent control of hot-air drying of fruits and vegetables,in the paper,the methods of mathematical model and dielectric constant were combined to design an online measuring device for moisture content in hot air drying process of fruits and vegetables based on MCU, taking the advantage of Micro Controller Unit IAP15 W4 K58 S4,and high-precision capacitive sensor AD7746. Setting Coprinus comatus as the research object,through the hot-air drying experiment,the mathematical model and the relation between relative dielectric constant and moisture content were established,which could accurately calculate the moisture content during the hot-air drying process.The models were coded,compiled and written into the measuring system. The system realized dual-mode measurement. The experimental verification results show that the device can accurately measure the moisture content in hot air drying process of coprinus comatus,and the relative error of measurement results is less than 3%.
引文
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[19]朱武,张佳民.微小差分电容检测技术的研究[J].测试技术学报,2004,18(3):203-207.
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[21] AD7745/7746 Data Sheet[M]. USA:Analog Devices,Inc,2005.
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[23]刘志壮,吕贵勇.基于电容法的稻谷含水率检测[J].农业机械学报,2013,44(7):179-181.
[24]郭文川,刘东雪,周超超,等.基于电容特性的植物叶片含水率无损检测仪[J].农业机械学报,2017,45(10):287-293.
[25]郭文川,赵志翔,杨沉陈.基于介电特性的小杂粮含水率检测仪设计与试验[J].农业机械学报,2013,44(5):188-193.
[26]郭文川,刘驰,杨军.小麦秸秆含水率测量仪的设计与试验[J].农业机械学报,2013,29(1):33-40.
[27]卜召辉,胡庆国,陆宁.真空微波与真空冷冻联合干燥金针菇的研究[J].包装与食品机械,2011,29(3):16-19.
[2]罗云波,蔡同一,生吉萍,等.园艺产品贮藏加工学(加工篇)[M].北京:中国农业大学出版社,2001:2-18.
[3]单杨.中国果蔬加工产业现状及发展战略思考[J].中国食品学报,2010,10(1):1-9.
[4]孙芳,江水泉.我国果蔬干燥加工技术现状及发展前景[J].粮食与食品工业,2016,23(4):11-20.
[5]陆则坚.干燥过程气体成分对蔬菜干制品质的影响[J],农业工程学报,2004(4):188-191.
[6]安瑜.果蔬干燥新技术及存在的问题[J].食品工程,2013(2):9-11.
[7]沈卫强.果蔬干燥新技术及应用前景[J].农机化研究,2009,31(12):236-238.
[8]张立彬,胡海根.果蔬产品品质无损检测技术的研究进展[J].农业工程学报,2005,21(4):176-180.
[9]秦文.蔬菜物料的介电特性及其应用研究[D].重庆:西南大学,2007:13-14.
[10] Dunlap W C,Makower B. Radio-frequency Dielectric Properties of Dehydrated Carrots[J]. Journal of Physical Chemistry,1945,49(6):601-622.
[11]王政.基于介电特性的植物油品质快速检测技术的研究D].雅安:四川农业大学,2009.
[12]秦文,张惠,邓伯勋.部分农产品水分含量与其介电常数关系模型的建立[J].中国食品学报,2008,8(3):62-67.
[13]张黎骅,张芳,赵超.花椒微波干燥数学模型的试验研究[J].农机化研究,2008(12):104-109.
[14]汪政富,李玲玲,胡小松,等.两种不同晾房中无核白葡萄薄层干燥的数学模型[J].农机化研究,2008(5):28-31.
[15]张凡.姜片的微波与热风联合干燥工艺及动力学研究[D].长春:吉林大学,2015.
[16]弋晓康.红枣热风干燥特性及品质试验研究[D].长春:吉林大学,2015.
[17] S Dhanushkodi,Vincent H. Mathematical modeling of drying behavior of cashew in a solar biomass hybrid dryer[J].Resource-Efficient Technologies,2017,3(4):359-364.
[18]邓彩玲,林羡,徐玉娟,等.龙眼热泵干燥特性及数学模型的研究[J].食品工业科技,2013,34(12):115-125.
[19]朱武,张佳民.微小差分电容检测技术的研究[J].测试技术学报,2004,18(3):203-207.
[20]陈力,陈仁文. AD7745在微机械电容式传感器测量电路中的应用[J].仪器仪表用户,2006,13(4):75-76.
[21] AD7745/7746 Data Sheet[M]. USA:Analog Devices,Inc,2005.
[22]张鹤岭,郭玉明,张建华.果蔬冻干水分在线无线监测装置设计与试验[J].农机化研究,2016,38(5):92-106.
[23]刘志壮,吕贵勇.基于电容法的稻谷含水率检测[J].农业机械学报,2013,44(7):179-181.
[24]郭文川,刘东雪,周超超,等.基于电容特性的植物叶片含水率无损检测仪[J].农业机械学报,2017,45(10):287-293.
[25]郭文川,赵志翔,杨沉陈.基于介电特性的小杂粮含水率检测仪设计与试验[J].农业机械学报,2013,44(5):188-193.
[26]郭文川,刘驰,杨军.小麦秸秆含水率测量仪的设计与试验[J].农业机械学报,2013,29(1):33-40.
[27]卜召辉,胡庆国,陆宁.真空微波与真空冷冻联合干燥金针菇的研究[J].包装与食品机械,2011,29(3):16-19.
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