基于同心轴圆筒式电容传感器的花生仁水分无损检测技术

为了实现花生仁含水率的快速准确检测,设计了以MSP430单片机为控制芯片的花生仁含水率检测仪,利用圆筒式电容传感器、温度传感器和称质量传感器分别检测花生仁的电容、温度和容积密度,通过信号检测调理电路进行测量信号电容到频率的转换,单片机进行数据处理后计算出花生仁含水率,在液晶屏上显示检测结果,并将检测数据存储到内存卡中。进一步研究了含水率、温度和容积密度对频率的影响规律,建立了描述含水率与差频、温度的数学模型,并验证了基于电容法检测花生含水率的可行性和模型的可靠性。试验表明,在含水率6.4%～18.2%、温度10～40℃范围内,该检测仪的测量相对误差绝对值小于0.5%。该研究为快速无损检测花生仁...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. 9; pp. 212 - 218
Main Author 赵丽清 尚书旗 高连兴 胡修慧 殷元元 龚丽农
Format Journal Article
LanguageChinese
Published 沈阳农业大学工程学院，沈阳 110161 2016
青岛农业大学机电工程学院，青岛 266109%青岛农业大学机电工程学院,青岛,266109%沈阳农业大学工程学院,沈阳,110161
Subjects
含水率
容积密度
温度
温度补偿
电容法
花生仁
温度
温度补偿
容积密度
电容法
capacitance
bulk density
含水率
temperature
花生仁
temperature compensation
peanut kernel
moisture content
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.09.030

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Summary:为了实现花生仁含水率的快速准确检测,设计了以MSP430单片机为控制芯片的花生仁含水率检测仪,利用圆筒式电容传感器、温度传感器和称质量传感器分别检测花生仁的电容、温度和容积密度,通过信号检测调理电路进行测量信号电容到频率的转换,单片机进行数据处理后计算出花生仁含水率,在液晶屏上显示检测结果,并将检测数据存储到内存卡中。进一步研究了含水率、温度和容积密度对频率的影响规律,建立了描述含水率与差频、温度的数学模型,并验证了基于电容法检测花生含水率的可行性和模型的可靠性。试验表明,在含水率6.4%～18.2%、温度10～40℃范围内,该检测仪的测量相对误差绝对值小于0.5%。该研究为快速无损检测花生仁含水率提供了参考。
Bibliography:11-2047/S
Peanut is an important oil and economic crop, and also a major export product in China. Peanut industries manufacture many types of peanut-based products for human＇s life. The moisture content of peanuts is in the range of 45%-50% when peanuts are freshly harvested, and the moisture content has to be below 10.5% in storage. High moisture content in peanut kernels can make them moldy, which mainly produces the toxic aflatoxins and causes huge waste and jeopardizes human＇s health. Therefore it is necessary to keep proper moisture content in every treating process of peanuts. The detection of moisture content plays an important role in harvesting, drying, storage and trade of peanuts. Although the traditional oven-drying method has high precision, it is cumbersome and takes a lot of time. In addition to the oven-drying method and the microwave method, the near infrared method and the capacitance method are also common methods of moisture content detection. Comparing to other methods, the capacitance met
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.09.030