Design Of Information Collection And Transmission System For University Personnel Based On Active RFID

With the continuous increase in the number of people in colleges and universities,in order to provide the majority of students more intelligent,user-friendly classroom information inquiry approach,as well as to facilitate the teachers of student attendance information query and college students unified management.Therefore,intelligent classroom personnel information statistics and publishing system arises at the historic moment.This paper mainly completes the design of personnel information collection and transmission subsystem.This design uses 2.4GHz active RFID technology to realize low cost and automated information acquisition process,using the embedded u IP protocol running on the STM32 micro controller to realize the transmission process of the personnel information in the transmission environment of campus network.The design of personnel information collection and transmission system is divided into three parts: label transmitter,reading and data processing and data transmission.The main work of the paper includes:(1)Compare the common information collection technology,transmission protocol,analysis the requirements of system and design of the overall framework,builds the system design scheme based on the label transmitter,reading and data processing side and data transmission side.(2)Label transmitter,design the overall structure of the label transmitter,the transmission address of the multi-channel reception is classified and configured,and the data packet format design based on the student number is completed.Focus on the design of a low power consumption information transmitter combine the launch flow of nRF24LE1,which realizes the automatic and ultra-low power consumption.(3)Reading and data processing,the design of nRF24L01+ receiver with three different channels is realized,the interface design of the RF receiver chip nRF24L01+ and micro controller STM32 is completed,then the data receiving design is completed.Design the overall structure of reading and data processing,the 30-second cache of the data and the 5-second transmission scheme are determined,and the design of data packet format and the design of watchdog timer for device self-detection are finally completed.(4)The label transmitter,completed the design of ENC28J60 for the embedded Ethernet card and the porting of u IP protocol stack for the embedded Ethernet protocol,designed the data transmission side to do the client's embedded Ethernet data transmission program,completed the design that data transmission side automatically connect the database server.The label transmitter,read and data processing and data transmission side are connected and debugged,and the data transmitting and receiving test is carried out,to achieve the server side of the successful reception of data.