桁架式超声雾化栽培器的雾滴沉降和根际温湿度变化规律  

Variation of root-zone droplet deposition,temperature and humidity of truss ultrasonic atomization cultivator

作　　者：高建民[1] 黄桂珍[1] 尹文楚[1] 陆岱鹏[1] 李俊一[1] 刘昌鑑[1] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室/江苏省重点实验室,镇江212013

出　　处：《农业工程学报》2013年第6期185-192,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助(项目编号:51275214);江苏省自然科学基金资助项目(项目编号:BK2011470);江苏省研究生创新计划资助项目;江苏高校优势学科建设工程资助项目(苏财教﹝2011﹞8号)

摘　　要：桁架式超声雾化栽培器的根域雾场及温度场对雾化栽培效果的影响极大,甚至决定了雾培的成败。应用NIPCI-6110数据采集卡在Labview平台上,构建了温湿度的实时采集系统;以PIC16F877A芯片为核心构建了喷雾控制系统;应用四因素五水平的二次回归正交旋转组合设计试验方法,研究了出风口面积、室内温度、雾化率和喷雾时间对桁架式雾化栽培器栽培管道内雾滴沉积量、温度和湿度变化的影响,建立了雾滴沉积量和温湿度的二次回归模型,为该型雾化栽培器实现根际雾场以及温湿度最优控制提供了试验依据。结果表明:喷雾时间、雾化率以及出风口面积和室内温度的交互作用对上下管道内雾滴沉积量的影响显著;出风口面积,室内温度、雾化率和喷雾时间对上下管道内温度影响显著;出风口面积和室内温度的交互作用对上管道内温度影响显著;出风口面积,室内温度和喷雾时间对上下管道内湿度的影响显著。Temperature and humidity in root zone were crucial even vital factors that influence aeroponic efficiency of truss ultrasonic atomization cultivator. A real time acquisition system of temperature and humidity based on Labview with data acquisition card NI PCI-6110 and a spray control system with micro computer unit PIC16F877A were developed. How these factors of the wind outlet area, temperature in truss tube, atomization rate and spray time influenced the deposition of spraying droplets, temperature and humidity in cultivation pipes of truss ultrasonic atomization cultivator were investigated. Quadratic regression rotation combination orthogonality experiment design of four factors and five levels was adopted to study quadratic regression model of deposition of spraying droplets, temperature and humidity. According to regression equations of temperature and humidity of upper and lower layer pipeline, when the wind outlet area was 1174, 2205 and 2640 mm2, respectively, the corresponding spray time was 6.3, 5.9, 7.1h, indoor temperature 25 ℃, corresponding atomization rate one, two and three, the temperature of prediction 25 ℃, and humidity was 100%. And the corresponding temperature which we measured was 24.16, 24.25, 24.08 ℃, and corresponding humidity was 98.96%, 98.58%, 99.23%, respectively. All control relative errors were less than 5%. Therefore, these regression equations could be used to predict the temperature and humidity of this type of ultrasonic atomization cultivator and be applied to the optimal control of temperature and humidity of plant root zone of this type of ultrasonic atomization cultivator. The results showed that the interaction of spray time, atomization rate, the wind outlet area and temperature had significant influence on the deposition of spraying droplets of upper and lower layer pipeline. The wind outlet area, temperature, atomization rate and spray time had significant influence on the temperature of upper and lower layer pipeline. The interaction of the wind outlet area and

关 键 词：雾化 温度 湿度控制 桁架式 雾滴沉积量 

分 类 号：S491[农业科学—植物保护]