Research On Water Quality Monitoring System Of Fishpond Based On ZigBee Technology

China is an aquaculture superpower.However,with the increasing shortage of land resources,it is necessary to increase the breeding density and automation level in China.It is necessary to monitor the water quality parameters that seriously affect the growth safety of water products.At present,neither homebred aquaculture equipment nor monitoring system cannot be deployed at the scene.The fishing equipment and monitoring system,bought from abroad,are veryexpensive.Both of them can notbe widely put into force in China.Aiming at this situation,a water quality environment monitoring system for fish ponds based on ZigBee technology is proposed.Its main function is to monitor the important water quality parameters in the process of fish pond aquaculture in real time,so as to reduce the labor burden,improve the automation level of fish pond aquaculture,and increase the production and quality of fish organisms.The monitoring system uses LPC2132 as the main controller to monitor and regulate water quality parameters.This system designs wireless sensor network based on ZigBee technology,uses CC2530 core processor to design wireless sensor nodes,and designs corresponding signal conditioning circuit for selected temperature,air pressure,PH value,dissolved oxygen and water level sensors.The monitoring terminals of each fish pond can be automatically networked with coordinator as sub-nodes,and transmit monitoring information to the monitoring and control system of upper computer.Based on Visual Studio 2010 and SQL Server,the monitoring software of the upper computer is developed.The upper computer can display the water quality parameters of each fish pond terminal in real time,and store the Listoncal data in Access database for data analysis.At the same time,throough the monitoring interface of the host computer,the water quality parameters of the fish pond can be set a ifareshold and the control information can be sent to each fish pond control terminal through ZigBee network.The lower computer terminal will automatically adjust the water quality parameters of the fish pond through the executing mechanism according to the set threshold.When the water quality parameters exceed the threshold,the sound and light alarm will be carried out.In addition to the upper computer display,each terminal can also display the current water quality parameters of fish ponds locally through Nokia 5110 LCD display screen.Finally,the prototype and system designed were tested.The sensor accuracy test results show that the error of the sensor test is controlled within 2.5%,and the accuracy meets the measurement requirements.After long-term experiments,the system has the characteristics of stable operation,low power consumption and long network life.It can realize long-term monitoring of fish pond culture environment,and has a good market prospect and popularization and application value.