Design And Implementation Of Water Quality Monitoring System Based On STM32

Aquaculture is one of the important projects in China’s agricultural economic development.Although the development speed is relatively fast in recent years,with the continuous expansion of aquaculture scale,the water quality requirements for aquaculture bases are getting higher and higher.How to improve the water quality of aquaculture has become the current focus.research problem.The traditional water quality monitoring system transmits the water quality related data information by means of wired transmission.Although the data information can be accurately transmitted,the monitoring range is small,and the water wiring is also a problem,which is easily damaged by biological foraging and cannot be operated in the water for a long time.To this end,domestic and foreign research scholars have designed wireless transmission function modules using wireless transmission technology to solve the wiring problem.In order to facilitate users to view the water quality of the aquaculture base,a two-way communication function has been designed,from the field collection terminal to the user mobile phone and monitoring center.The server sends water quality information,which increases the workload of the field terminal equipment and reduces the real-time data.Based on the previous research,this paper selects STM32F103ZET6 micro-processing as the core controller and designs a water quality monitoring system.Firstly,the water quality monitoring system was designed with water quality sensor technology,wireless transmission technology,STM32 development tools and solar power supply technology.Secondly,STM32F103ZET6 micro-processing is selected as the core controller,and MSP430F149 single-chip microcomputer is used as the sensor drive processor.The water quality monitoring system information acquisition terminal scheme is designed.The DS18B20 water temperature sensor,MIK-160PH-4 PH value sensor and KDS-25 B dissolved oxygen sensor are used to collect.Water temperature data,PH value,dissolved oxygen data,data transmission through the GPRS DTU module,control the operating state of the aerator according to the control center control commands.Thirdly,Microsoft Visual Basic 6.0 is selected as the remote monitoring terminal server development environment.The Microsoft Office Access 2003 database is used to store data information.The database and system data access connection is established through ADO technology.The remote monitoring terminal solution is designed.The GSM module is used to implement the AT command.Data communication between the server and the user’s mobile phone.Finally,the water quality monitoring accuracy,power supply module,historical data storage and query functions are taken as examples to test the system performance.The test results show that the temperature,PH value and dissolved oxygen monitoring data of the water quality monitoring system designed in this paper meet the requirements of water quality field terminal monitoring.The monitoring accuracy of temperature sensor,PH sensor and dissolved oxygen sensor are 98.3%,98.7%,97.6%.the above.The system power supply module supports power supply in rainy days,and the continuous operation on rainy days reaches 7 days,meeting the system power supply requirements.In addition,the communication quality of the wireless transmission module of the water quality monitoring system designed in this paper is stable and reliable,supports historical data query,and can search historical data according to the date.