摘要
为促进稻鸭共作技术的推广应用,提高稻田鸭舍的自动化水平,设计了鸭舍自动喂水系统。该系统主要由水箱、液位控制器、液位传感器、乳头式饮水器、水管、水泵等部分组成。液位控制器由STC15F2K40S2单片机和集成控制电路组成,可进行水箱液位检测和水泵驱动,实现水箱低水位自动补水、有效防止高水位水溢出的功能。利用该系统进行了液位控制性能试验,根据试验结果确认该喂水系统为一阶惯性系统。通过SPSS对试验数据进行非线性回归分析,利用系统识别的方法,确定液位高度控制系统的传递函数。根据MATLAB分析系统的动态性能结果可知,从水箱低水位上升到高水位所需时间ts=300s,系统稳态误差ess=0,表明系统运行稳定、反应快速、执行结果准确,可以实现野外鸭舍喂水系统的自动控制。田间作业试验表明:喂水系统的平均每100s故障次数为0.101次,平均故障率为2.71%,时间利用系数平均值为97.35%。喂水系统可靠性达到了设计要求,可满足实际应用需要。
An automatic water supplying system was designed to extend rice-duck eco-farming technology and improve the automatic level of duck shed in paddy field. The system was mainly composed of water tank, liquid level controller, watering nozzles, water pipe and water pump. Liquid level controller was composed of STC15F2K40S2 singlechip and integrated control circuit, which could detect liquid level and drive pump. The water supplying system could automatically fill the water tank at low liquid level, and prevent water from overflowing. The performance of the liquid level control of the system was tested based on the automatic water supplying system and the system was identified as inertial system according to the test data. Nonlinear regression analysis of experimental data was accomplished by SPSS, and the transfer function of water supplying system was determined using the system identification method. The dynamic performance of the system was analyzed with MATLAB. 300 seconds were required to fill the water tank from bottom level to upper level, and the steady state error was zero, which showed that the system responded fast, operated stably and accurately. The water supplying system of the duck shed could be automatically controlled in paddy field. The field performance test showed that the average failure rate of the system was 2.71% and the mean time utilization factor was 97.35%. The reliability meets design requirement and satisfies the needs of the practical application.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2015年第5期618-623,共6页
Journal of Shenyang Agricultural University
基金
沈阳市农业科技共建项目[沈农经发(2013)54号]
关键词
稻鸭共作
鸭舍
喂水系统
液位控制
可靠性
rice-duck eco-farming
duck shed
water supplying system
liquid level control
reliability
