混药质量浓度在线检测装置  

Online Detector of Pesticide Mixing Concentration

作　　者：邱白晶[1] 贾方闻[1] 邓斌[1] 王立伟[1] 陆洪兰 

机构地区：[1]江苏大学现代农业装备与技术教育部重点实验室,镇江212013

出　　处：《农业机械学报》2014年第2期99-104,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家农业科技成果转化资金资助项目(2012GB2C100154;2010C10046);国家自然科学基金资助项目(31271620);江苏省高校自然科学研究重大资助项目(10KJA47007);国家公益性行业(农业)科研专项资助项目(201203025-04);江苏高校势学科建设工程资助项目(苏财教(2011)8号)

摘　　要：根据溶液质量浓度不同,其折光率不同的原理,设计了一种混药质量浓度在线检测装置。采用波长650 nm二极管激光器作为光源,PSD作为光斑位置探测器,设计和制造了有机玻璃材质的三角形检测管和以OPA4277芯片为主的信号调理电路。在流量为4.7、5.4和6.1 L/min时得到的光斑位置与质量浓度拟合曲线的决定系数R2均大于等于0.983 1,且随着流量的减小,其拟合曲线的决定系数逐渐增大。在流量为6.1 L/min时,在线测量混药质量浓度存在最大偏差为0.075 1 g/L,平均相对误差为8.99%。表明该装置可用于混药质量浓度的在线检测。An online detector of pesticide mixing mass concentration was developed based on the fact that different concentrations of solution had different refractive index. A 650 nm diode laser was used as the light source and a PSD as the light spot position detector. A PMMA triangular detector tube and a signal adjustment circuit based on 0PA4277 chip were designed and manufactured. The experimental results showed that at the flow of 4.7, 5.4 and 6.1 L/min, the determination coefficient of position/ concentration fitted curves were all above or equal to 0. 983 1, and it increased with the flow decreased. At the flow of 6.1 L/rain, the maximum deviation was 0. 075 1 g/L and the average relative error was 8.99% , which showed that the developed detector could be applied to mixing mass concentration online detection.

关 键 词：混药质量浓度 折射率 二极管激光器 位置敏感探测器 检测管 

分 类 号：S237[农业科学—农业机械化工程] S49[农业科学—农业工程]