Diagnosis and Control of Hydroponic System Based on Al

为实现计算机集成农业，本研究通过水培栽培番茄植株，对栽培过程进行了测量和识别，并探讨了人工智能在栽培过程中引入诊断和专家系统的可能性。研究结果表明：(1)栽培过程的测量与辨识对植物生长的诊断：明确了通过辨识(线性、非线性、在线)来表达水培植物栽培过程是可能的。(2)栽培支持专家系统：利用本研究介绍的Al计算机开发了专家系统的语言。将栽培技术知识构建为专家系统，根据植物生长情况改变水培系统的EC设定值，使专家系统运行良好。(3)水培系统的模糊控制：水培系统中存在各种不确定参数，给系统诊断和控制带来困难。将模糊理论引入到番茄栽培支持系统中是非常有效的。(4)番茄栽培支持系统：研究了番茄栽培过程的计算机控制支持系统，建立了番茄栽培的计算机集成系统。(5)计算机集成农业的可能性：建立了水培系统常规过程控制中人工智能与模糊信息处理和计算机处理相结合的模型，明确了计算机集成系统在农业中应用的可能性。

In this research, In order to realize computer integrated agriculture, the authors cultivated tomato plants in hydroponics, measured and identified the cultivation process, and investigated the possibility of introduction of diagnosis and expert system by al Al (artificial intelligence) into cultivation process. As the results, the followings have been mede clear.(1) Diagnosis of plant growth by measurement and identification of cultivation process :It was made clear that it is possible to express the process of plant cultivation in hydroponics by means of identification (linear, non-linear, on-line).(2) Cultivation support expert system by Al :Languages for expert system have been developed by using the Al-computer introduced in this research. Know-how of cultivation was constructed as an expert system, and the expert system which changes the EC' set-point of hydroponic system according to the plant growth works well.(3) Fuzzy control of hydroponic system :There are various uncertain parameters in hydroponic system, causing the difficulty of system diagnosis and control. It have been made clear that introduction of fuzzy theory into these problems is very effective.(4) Support system for tomato cultivation :The authors investigated support system which controls cultivation process by computer, and made a good system for tomato cultivation.(5) Possibility of computer integrated agriculture :The authors developed a model which integrated Al and fuzzy information processing and computer processing in conventional process control in hydroponic system, and made clear the possibility of computer integrated system in agriculture.