关键词: 无线射频识别, 无线多点传输, 课堂考勤, 防违规

Abstract:

In order to make up the disadvantage that the traditional attendance system used in classroom takes up the class time. At the same time, in order to improve students'class attendance, and eliminate the burden that the teachers Statistics students usually scores manually. We developed a attendance system used in campus classroom based on radio frequency identification technology. The system combines student IC card which has been popular used on campus. It uses two alignment type infrared sensors combined FM1702SL wireless RF card reader to Get students' name, number, and status that students out of the classroom or not. Then the information is transmitted to the host computer through the nRF24L01 wireless transmission module and the FT232RL level conversion circuit. The host computer statistics, organizes information and generate students usual results through the software program written in Visual Basic language. It can eliminate the burden of teachers. System testing arrangements for 183 college students carrying the Student IC card out of the classroom, which 101 students from bringing himself and other students IC card and continuous brush cards illegal operations in and out of the classroom, and the remaining 82 students make a normal credit cardoperation. The test results show that 98 students violate the rules amd 81 students obey the rules, the relative error is less than 3%.

Key words: radio frequency identification(RFID), wireless multi-point transmission, class attendance, anti violations