The Application System Development Of Embedded Data Acquisition And Processing

At present,there are many shortcomings in the traditional attendance methods of university classrooms,such as false sign-in and spot check,which leads to deviations in student attendance data.Coupled with the popularity of smart phones,students use mobile phones during class lead to inefficiency in attending lectures and low enthusiasm for teachers,which in turn to the poor academic performance for students.Effectively solving the above two problems has become an urgent need in the university teaching process.Nowadays,biometrics such as swipe,fingerprint,face and iris can not meet the needs of signing in and managing mobile phones at the same time.Based on this situation,the smart phone bag project developed by this project can effectively solve the shortcomings of student attendance and the phenomenon of playing mobile phones in the classroom.The system is used to solve: 1 students sign in.2 student registration information records,the student's check-in situation is recorded faithfully for later statistical analysis.3 student registration information for statistics and display.4 Storing the phone.This system uses the tomcat + MySQL + Raspberry Pi + Linux approach,using the Tomcat as a server,for receiving and sending various requests and responses,MySQL as a database to store various service information.Raspberry Pi as a mobile phone holder the service program running environment and the support of the mobile phone support.Linux as the server operating environment.Teacher machine client written in C#,JSP + HTML + JavaScript + CSS production teacher background management website.The main functions of the entire system include user management,check-in,data statistics display,anti-generation control,and Storing the phone.According to the idea of "high cohesion and low coupling" of the system,the proposed system should be divided into three levels.The first layer,which is also the basic level of the system,is the database layer.This layer includes basic database operations and database links.The second layer,in the server design,the server is the core of the system,the server is used to handle the operation from the client,mainly from the mobile phone,teacher machine,background data management website,and mobile phone frame four aspects of the operation request.The third layer,the application layer,is the main function to complete the task of the respective data request and to process the data returned from the server,through a visual way,at a glance in front of teachers and students.The system is tested with the actual school curriculum.During the test,the system runs stably and does not drop online.The test results are basically in line with the expected target effect: The class time occupied by sign-in was reduced from 5-6 minutes to 1-2 minutes,shortening the check-in time;the average sign-in rate was as high as 97.7%,and the number of on-time sign-ups was as high as 90.9%,which improved the attendance rate.Prevent students from getting in touch with their smartphones.