摘要
为了克服温度和容积密度对电容式粮食含水率测量仪精度的影响,设计了能够同时检测粮食电容、温度和容积密度的硬件电路和程序。电容传感器为同轴圆筒型,以数字式温度传感器DS18B20检测温度,由应变片组成的桥式电路检测质量,进而计算容积密度。根据得到的电容、温度和容积密度值,基于数据融合技术可得到被测样品的含水率。
In order to overcome the influence of temperature and bulk density on the precision of capacitive grain moisture content meter,the hardware and software which can measure capacitance,temperature and bulk density of grain simultaneously were designed.The coaxial cylindrical capacitor was used to measure capacitance,digital temperature sensor DS18B20 was used to detect temperature,and the bridge circuit made by strain gauges was applied to detect mass,then the bulk density was calculated.According to the values of capacitance,temperature and bulk density and based on information fusion technology,the moisture content of grain was gotten.
出处
《农机化研究》
北大核心
2011年第11期131-134,共4页
Journal of Agricultural Mechanization Research
基金
中央高校基本科研业务费资助项目(QN2009043)
关键词
粮食
水分
电容传感器
温度
容积密度
grain
moisture
capacitor senor
temperature
bulk density
