Design And Implementation Of Measurement And Control System Of Aquaculture Based On IoT

At present,China has become a large aquaculture country,aquaculture production and scale are among the highest in the world.However,with the increase in farmed species,traditional extensive farming easily leads to water pollution,and the aquaculture industry will have huge economic losses.Therefore,due to timely and accurate access to aquaculture environmental data,reasonable oxygen,scientific feeding,it has become a development trend by using of emerging technology.In this situation,using Internet of Things technology can make the breeding of biological growth in the most suitable environment.Thus it has important significance and application prospects by improving aquaculture production and achieving high yield purposes.Based on the three-tier structure of the Internet of Things,this paper designs the aquaculture measurement and control system which based on the IoT.The main work of this article is as follows:(1)In view of the unobstructed characteristics of aquaculture waters,a water quality monitoring node consisting of solar energy is designed to reduce the maintenance cost of line corrosion.The node monitors the water temperature,dissolved oxygen and p H in the water quality,and uses the standard MODBUS-RTU protocol for water quality parameter transmission.(2)A device control node consisting of an optocoupler relay and an AC contactor is constructed.While the optocoupler relay receives the command,the relay controls the AC contactor to pull or disconnect,and the device connected to the AC contactor to open or close;the optocoupler relay uses the optocoupler signal to obtain the equipment running state.(3)According to demand,the hardware part of the embedded gateway is constructed.This part mainly includes SIM900 A GPRS module,STM32 single chip,RS485 communication interface,clock module,memory module and power module.(4)In order to reduce the wiring,this paper builds the aquaculture site ZigBee wireless sensor network in order to reduce the wiring.The water quality monitoring node sends the collected water quality parameters to the embedded gateway through the ZigBee network.After receiving the instruction,the embedded gateway sends the instruction to the device control node through the ZigBee network,and the device control node feedback execution status.(5)This part designs and realizes the software components which based on the embedded gateway,server and Android client.Embedded gateway to achieve the environmental data upload,monitor the server's instructions and real-time data acquisition,aerator and feeding machine remote,timing and automatic control;The server implements the communication between the embedded gateway and Android client,a culture data storage and Android client data query interface;Android client designed the human-computer interaction interface,and to achieve real-time farming data display,three modes of equipment control,historical data query and other functions.