| Higher vocational colleges require teachers to check the students' classroom attendance before each class based on the students' academic characteristics and the school's management requirements.The traditional way is to use a roster for verbal naming,which takes a long time and is very poor in real time.In order to improve the efficiency of naming,some schools are convenient for schools to discover and manage students' attendance in a timely manner.They use methods such as taking pictures,SMS cats,etc.However,because these systems are not used for networking,only some functions are solved.It is not a good way to improve efficiency.Based on the above requirements,we will design a system that can automatically name the points with the help of school-level projects.In order to design the system,the school teachers,students and managers were first investigated through questionnaires,and the most basic needs of the system were obtained through investigation.Combined with the existing technical reserves,the system was designed to meet the needs.The entire system is designed in a demand-function-module three-level manner.The system is finally divided into three subsystems for design and implementation.Subsystem 1: Data acquisition system,which is a terminal node held by students,consisting of a fingerprint collection module and a ZigBee module,mainly for collecting and transmitting fingerprints.Subsystem 2: The data transmission system,which is a gateway node,consists of a ZigBee module and an Ethernet module,and mainly converts the ZigBee frame into an Ethernet frame and transmits it to the server through the campus network.Subsystem 3: The server system is composed of server equipment and software placed in the equipment room,wherein the software part is divided into a fingerprint identification algorithm and data storage.The fingerprint identification algorithm is used to identify the transmitted fingerprint information;and the data table is used to store the generated attendance information,and generate a report for querying the student attendance information.To realize this system,it is necessary to study the techniques of ZigBee networking technology and interference control of ZigBee network.For the ZigBee networking technology,on the basis of the ZigBee fast networking,through the secondary development,the control field is set,so that the gateway node can control the terminal node.For the interference control of ZigBee network,it is necessary to study the cause and mechanism of ZigBee network interference,and then realize the control of interference by means of mobile network optimization method.In order to meet the requirements of the system,the data table needs to be designed.In the structure of this paper,the second chapter is the demand analysis and overall design of the system;the third chapter completes the design and implementation of the terminal node;the fourth chapter is the design and implementation of the gateway node;the fifth chapter is the server The design and implementation of the system,in the end according to the indicators and requirements presented in Chapter 2,the system nodes and the total system were tested.After testing,the system as a whole meets the needs of the school. |
