Design And Implementation Of Cooperative Positioning Monitoring System Based On Multi-Source Data Fusion

With the coming of the aging population and the opening of the two-child policy,many old people and children need care.However,people have no time to accompany their parents and children because of the fast pace of life,which leads to the loss of the elderly and children and the abduction of children.Although various Internet platforms have found a lot of lost people,they have no cure for the symptoms.However,due to the limitation of satellite positioning in some areas,mobile devices have many positioning dead angles.In order to solve the above problems,this paper designs a cooperative positioning monitoring system based on multi-source data fusion,which can realize the real-time location monitoring and display of the target.Firstly,the functions of the cooperative positioning monitoring system are analyzed.According to the functions,the system is divided into three parts: the lower computer,the server and the database,and the key technologies of each part are introduced.Secondly,the method of pedestrian dead reckoning(PDR)is studied in detail.The coordinate conversion of PDR system to geographic coordinate system is clarified,and the method of obtaining the step size,step frequency and heading angle of PDR system is studied.The feasible schemes of satellite navigation and PDR integrated navigation are analyzed.Then,the hardware and software of the system are designed.The hardware mainly includes STM32 module,gyroscope accelerometer module,geomagnetometer module,GPS module and GPRS module.The software is divided into the lower computer software and the server software.The lower computer software realizes the collection,preprocessing and transmission of motion information and satellite positioning data.The server software includes data processing and My SQL data access.Finally,the overall debugging of the system is completed.The working state of the lower computer is tested,and the login registration,real-time location and history track query are realized.Through verification,the cooperative positioning monitoring system designed in this paper can monitor the position information of the easily lost people,which makes users to easily view various information of the monitoring target,and also lets users to monitor the position of the target by setting a geographical fence.The system can meet the monitoring needs of users.