基于模糊控制的水产养殖环境智能监控系统设计

为实时掌握水产养殖水质和气象环境信息,针对溶氧控制过程中非线性、惯性大和时滞的问题,以循环水流水槽养殖模式为基础,设计了水产养殖环境监测和控制系统。通过PLC对养殖环境中溶氧、pH、温度、湿度、风速、风向、大气压等参数进行信息采集与传输,上位机实时显示环境信息,用模糊算法处理信息,处理后的结果作为PLC的输出传送到变频器中,变频器控制增氧机调节水中溶氧量。结果显示:该系统可实时传输与显示上述参数信息,提供历史数据和环境异常报警功能。模糊控制在调节溶氧过程中超调小、精度高,溶氧偏差±0.4 mg/L,可减少增氧机启停次数、延长设备寿命。监控系统进行实地应用测试,达到预期效果,可在水产养殖中进行推广和应用。

Design of intelligent monitoring system for aquaculture environment based on fuzzy control

In order to grasp the aquaculture water quality and meteorological environment information in real time,and to solve the problems of non-linearity,large inertia and time delay in the process of dissolved oxygen control,aquaculture environment monitoring and control system was designed based on the circulating water tank aquaculture model.PLC was used to collect and transmit information such as dissolved oxygen,pH,temperature,humidity,wind speed,wind direction and atmospheric pressure in the aquaculture environment.The environmental information was displayed by the upper computer in real time and processed with fuzzy algorithms,and the processed results were transmitted as the output of the PLC to the inverter,which controlled the aerator to adjust the amount of dissolved oxygen in the water.The results show that the system can transmit and display the above-mentioned parameter information in real time,and provide historical data and environmental abnormality alarm functions.In the process of adjusting dissolved oxygen,fuzzy control has small overshoot and high accuracy,and the deviation of dissolved oxygen is±0.4 mg/L,which reduces the number of start and stop times of the aerator and prolongs the equipment life.The monitoring system achieved the expected results when it was subject to field application test.Therefore,it can be promoted and applied in aquaculture.