MetInfo -- Urban agent

College enrollment through the past few years, the engineering colleges of the experimental teaching pressure surge. Make experimental teaching in the Management of lack of experimental conditions and laboratory equipment, laboratory instruments relatively backward two major issues more prominent. In addition, colleges and universities nationwide are now under way of teaching quality assessment checks, while the experimental assessment of the important indicators of the teaching is the teaching of courses offered by the workload statistics, such as laboratory courses, pilot projects, experiments were the number of hours the number of comprehensive design experiment and the creation of situation. Have carried out per year per Teacher fill in a form similar to repetitive work, not only a waste of time, but statistics are inaccurate. Therefore, the author participated in the experimental teaching my school reform project designed based on the University Laboratory intelligent IC card management system. The system is mainly to achieve the experimental identification of students on the machine, bench power supply control, automatic generation of test content requirements, the experimental data and performance records, various types of experimental end of the semester workload statistics and upload and so on.

1 IC Card Intelligent Management System Principles of Laboratory 
    Non-contact IC card is also called radio frequency card, is the second bar code cards, magnetic cards after the launch of a new generation of SIM cards is a radio frequency identification RFID technology and IC card technology combination product. Non-contact IC card and barcode cards, magnetic cards, and contactless IC card comparison, high security, high reliability, long life and a convenient and so on.
    The system includes IC card reader module, bench power supply control system modules and server module experiment management system.
    ① The first two modules to complete the legal student status certification and laboratory bench power control.
    ② Experiment Management System module enables students to attendance to Browse / Server means the computer lab tables to the students to send the contents of pilot projects and requirements and accept students in the experimental data and reports.
    ③ server management system, all kinds of experiments report the completion of each semester, such as the laboratory curriculum, pilot projects and laboratory utilization and other statistics.

2 bench power supply control system design 
    Experimental stage, power supply control is validated student ID number IC card legitimacy to achieve. This feature is a IC card reader, the server test management systems and laboratory bench power supply control system for the three parts of a common SCM implementation.
    Server pre-entry students to experiment management system IC card ID number (set to the students to learn number). Students need access to laboratory experiments, the first IC card reader in the laboratory door on the credit card (the credit card device and the server to PS / 2 interface to connect), Card reader automatically deposited into the keyboard buffer server, the server Experiment management software by querying the status of the keyboard buffer to buffer the students read the card number, and with the legitimate card number matches the stored. If the IC card legitimate, server management system will be the end of double-digit card number (a number of natural classes of no more than 35 people) to RS485 communications transmitted to the laboratory bench power supply control system microcontroller.
    An 8-bit MCU will receive the card number is encoded by P1 I gave an 8-bit decoder. The decoder can output address decoder 255 pulses, but in fact the server pass over the effective range of 8-bit binary number is 1-35. Set the current student card number for the i, then Yi is the output of an effective TTL pulse. The pulse triggers flip-flop corresponding to the first i-set "1." Due to the transmission distance of 10 meters or more to drive solid state relay, and therefore on the pulse level conversion. This design will flip-flop "1" through the D flip-flop by the level converter converts 12-volt DC voltage to relay switch is closed. As a result, 220-volt input is switched to the experimental stage power supply. Thus completing the authentication of students, attendance and test-bed power control task.

3 Experiment Management System Server 
    The system is managed in strict accordance with the teaching of the experiment the Ministry of Education, "on the laboratory evaluation criteria" o Therefore, the need to input in our laboratory courses in "professional curriculum," Teacher were formulated based on the outline various experimental classes this semester, "Experimental Teaching Program" . All teaching plan entry is completed, the system according to the experimental teaching programs, the number of students for each class (lists of students and student input), the academic curriculum, and other factors such as the number of experimental arrangement, scheduled for this semester in our laboratory experiments the order of the table arrangement. Amended after confirmation, the system automatically under the "Order Form" monitor to record the experimental process, through student card number IC card authentication to prevent unauthorized users or to open the time the legitimate users of illicit laboratory equipment, automatically pairs of students in experiments intelligent management.