水肥一体机控制系统设计与试验

doi:10.12398/j.issn.2096-7217.2021.02.003

智能化农业装备学报（中英文） ›› 2021, Vol. 2 ›› Issue (2): 18-25.DOI: 10.12398/j.issn.2096-7217.2021.02.003

水肥一体机控制系统设计与试验

金永奎1，赵海瑞2，薛新宇1，孙竹1

1. 农业农村部南京农业机械化研究所，南京市，210014； 2. 江苏省农业机械试验鉴定站，南京市，210017

出版日期:2021-11-15 发布日期:2021-12-27
基金资助:
国家重点研发计划(2018YFD0201401)；江西省重点研发计划项目(20181ACF60027)；中国农业科学院创新工程—植保机械团队

Design and test of the control system of integrated irrigation and fertilizer applicato#br#

Yongkui Jin1, Hairui Zhao2, Xinyu Xue1, Zhu Sun1

1. Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture and Rural Affairs, Nanjing, 210014, China; 2. Agricultural Machinery Test and Appraisal Station in Jiangsu Province, Nanjing,

Online:2021-11-15 Published:2021-12-27
Supported by:
National Key R & D Program of China (2018YFD0201401)；Key Research and Development Project of Jiangxi Province (20181ACF60027)； Innovation Project of Chinese Academy of Agricultural Sciences—Plant Protection Machinery

摘要/Abstract

摘要： 针对目前水肥一体机控制系统存在调节时间长、配比波动大等问题，采用PID变量注入、比例、EC/pH实时调节等技术，研发由PLC控制器、触摸屏、I/O模块、EC/pH传感器等组成的水肥一体机控制系统。研究硬件组成、吸肥流量检测方法、基于比例、EC/pH的变量施肥控制方法和策略，编制相应的控制软件，构建完整的控制系统。通过试验检测控制系统的性能，对PID参数进行优化。采用优化后的参数，水肥一体机的比例调节范围为4‰~20‰，响应时间为80 s，最大超调量小于5%，稳态精度为3%；EC调节范围为800~4000 μs/cm，响应时间为80～120 s，稳态精度为4%；pH响应时间为120 s，稳态精度为±0.1。

关键词: 水肥一体机, 控制系统, EC/pH模式, PID参数, 响应时间

Abstract: Aiming to solve the problems of long adjustment time and large proportion fluctuation in the current control system of integrated irrigation and fertilizer applicator, the control system composed of PLC controller, touch screen, I/O module, EC/pH sensor was developed by using the technologies of PID variable injection, and proportion, EC/pH realtime adjustment. The hardware composition, fertilizer suction flow detection method, and variable fertilization control method and strategy based on the proportion and EC/pH were studied. The corresponding control software was compiled, and a complete control system was constructed. The performance of the control system was tested, and the PID parameters were optimized. Using the optimized parameters, the proportion adjustment range of the water fertilizer integrated machine was 4‰-20‰, the response time was 80 s, the maximum overshoot was less than 5%, and the steadystate accuracy was 3%. EC regulation range was 800-4000 μs/cm, the response time was 80-120 s, and the steadystate accuracy was 4%. The pH response time was 120 s, and the steadystate accuracy was ±0.1.

Key words: integrated irrigation and fertilizer applicator, control system, EC/pH mode, PID parameters;

中图分类号:

S224.4

金永奎, 赵海瑞, 薛新宇, 孙竹. 水肥一体机控制系统设计与试验[J]. 智能化农业装备学报（中英文）, 2021, 2(2): 18-25.

Yongkui Jin, Hairui Zhao, Xinyu Xue, Zhu Sun. Design and test of the control system of integrated irrigation and fertilizer applicato#br#[J]. Journal of Intelligent Agricultural Mechanization, 2021, 2(2): 18-25.

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水肥一体机控制系统设计与试验

Design and test of the control system of integrated irrigation and fertilizer applicato#br#

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