Analysis of network-based multimedia teaching equipment central control and management system design and implementation

Paper Keywords: multimedia teaching equipment management system for central control equipment, remote control
Abstract: Zhejiang Vocational College of Economy of the actual situation of multimedia teaching equipment as a starting point, use of the existing campus network resources, multimedia teaching equipment to establish a new information management system. The system can take advantage of multi-media teaching facilities in the teaching practice of .

High-quality vocational education is to train skilled personnel in the garden, full use of multimedia teaching equipment to create a productive learning environment simulation is a major trend. In recent years, the university invested a lot of funds for the construction of multi-media classrooms, the number of rapid growth. According to incomplete Statistics, Zhejiang Province, is a multimedia classroom undergraduate colleges and universities average about 300, about 200 vocational colleges. In the face of many buildings in different campuses and within the classroom, multimedia teaching the use of equipment management and maintenance problems have been highlighted. Many universities lack of modern management of multimedia teaching equipment, thus affecting the utilization of equipment, good rates and the results.

Most universities have completed the current campus network infrastructure, digital multimedia teaching equipment, network management is imperative. This paper discusses the multimedia teaching equipment information management model, and designed a LAN-based multimedia equipment, intelligent network management and maintenance of the network management system, the system of multimedia teaching equipment to make information management platform.

A multimedia classroom use and management of traditional problems
1.1 backward management, classroom resource constraints
Many universities are still lagging behind multimedia classroom management, necessary for teachers to borrow the key to switch multi-media equipment, to borrow a very complicated process. In addition, multimedia classroom with the construction of expensive equipment are constantly increasing. In order to prevent vandalism and enhance security measures , closed-end management of multimedia classrooms to make classroom resources are not fully utilized.

1.2 configuring uneven, difficult to unified management
Most of the schools because of funding, teaching demands and other reasons, not the construction of multimedia classrooms at one time, but was able to be completed after several configurations, which brand of multimedia devices, has a very different model. Meanwhile, in the manual management mode, equipment use and maintenance of track record is not detailed, the relevant functional departments of the device can not be unified management and allocation, resulting in lower utilization of equipment and can not provide accurate decision-making for the leadership of reliable data.

1.3 multimedia devices cumbersome to use
Multimedia teaching system equipment usually includes projector, computer, video booth, DVD players, stereos, the entire system on and off to each operation, the process is very cumbersome to use. After many repeated use, the device's settings will inevitably be changes to the maintenance and management of late a lot of trouble.

1.4 is not due to timely repair of Teaching
Multimedia equipment in use will inevitably lead to unexpected failures. If a failure occurs in the teaching process, teachers need to find someone to eliminate the office administrator, a waste of valuable class time, affecting the normal teaching. However, use of equipment equipment failures occur, usually due to improper use, just verbal instructions to solve the technical staff.

2, network-based multimedia teaching equipment central control system solutions
Web-based central control system is a multi-media network central controller, the control software, and other components in the control of the host.

Network central controller integrated video / audio switching matrix, IR / one-way RS232 control interface, VGA signal switching, MIC input / output control of electronic sound, projector, switch test function modules of the computer on / off, open the projector on / off, electric screen up / down, say Taiwan Power locks on / off, switching equipment, microphones and other centralized control to adjust the volume. through the built-in TCP / IP network module can be directly connected to the campus network.

In the control of networked multimedia devices, the host can remotely control, monitor, set the parameters to meet the needs of remote network management. The system built-in voice network module that allows teachers and administrators through the network IP phone calls in real time to solve the problem; system plus anti-theft probe contact person, when the projector is stolen, the control system will automatically alarm to the main control room.

Network central control system will integrate multi-media teaching facilities as a whole, a unified maintenance, monitoring and management. Network central controller connection diagram shown in Figure 1.


3 multi-media teaching equipment management information system
Network Central Control System of an effective solution to the decentralized classroom management difficulties, but still can not realize the information management of multimedia devices, such devices can not use Statistics to track equipment maintenance records, Statistics and time the projector lamp. In The system is based on the application, the author under the Zhejiang Economic and Technical Institute is proposed based on the actual situation of B / S <browser / server) mode multimedia teaching equipment information management system, through the campus of a large number of campus LAN remote centralized control of multimedia equipment and automated management.

3.1 System Function Design
Multimedia teaching equipment management system mainly consists of routine inspection system, 6 large modules, shown in Figure 2.


(1) daily inspection module. IP bound by the classroom, the students responsible for the inspection of the inspection according to the system administrator check each item that relates to the classroom and recorded the results. Through the fuzzy inquiry function, the administrator can view real-time inspection records;
(2) equipment management system. By the manager of multimedia classrooms in the device name, model, build time, the conversion time of input into the database of device information for the record. If a device fails need of repair, managers can log on maintenance of the registration interface, the input fault conditions. overhaul management of call after the repair overhaul of the corresponding single-input the date, maintenance conditions, maintenance people and other relevant information can be. relevant departments can be accessed through maintenance and management interface, replacing the use of real-time tracking device conditions and maintenance of;
(3) in the control management system. And network effectively with the central control system, remote management of the implementation of multi-media classrooms, including the monitoring and management, and voice intercom. Administrator log monitoring and management system through real-time view of equipment for each classroom, use of state media , and can remotely control the classroom multimedia equipment, such as the projector switches to achieve, curtain down, adjust volume, switch the video equipment and all operating functions, as shown in Figure 3. teachers in the use of the process encountered a problem and may call button network , administrators and teachers can use the intercom equipment guide the resolution of equipment problems call;

(4) Inquiry Statistics. Managers can use the date of the classroom section of the query, Statistics, aggregate, and report forms printing, such as classroom utilization, equipment maintenance information and troubleshooting, the projector lamp usage time statistics etc.;
(5) Arrangement System. Arrangement according to the actual situation of the system can automatically control the classroom. Such as: According to schedule, there is a classroom course, the management system can automatically open before the class 5 min in the control of the classroom, so that the device is in the classroom ready state, if no classes the next section, the management system can be classes in the next section closed after 5 min in the control and multimedia equipment; Links to Research Papers Download http://www.hi138.com (6) systems management. The background as a system module, the system has the modules are closely linked to its only system administrators have access, including user permissions, user account management, multimedia classroom information management, project management, inspection, failure phenomena management, data backup and so on.

3.2 database logical structure
According to the system functional design of the DMT of the database name, database by multiple forms, each form a table in that database. Part of the database table information is as follows:
(1) classroom information form: class code, belongs to buildings, computer IP address, computer name, IP address in the control, reduction of protection card models;
(2) multimedia device information table: Equipment Code, classroom code, device name, model specifications, the purchaser time;
(3) equipment replacement information table: ID address, class code, original equipment code, device code is the specific description, change the date, the responsible person;
(4) equipment maintenance information table: ID address, the device code, content maintenance, repair time, maintenance personnel.


3.3 System Platform
Current information platform, the main C / S (Client / Server) and B / 5 the two structural model. B / S model to the traditional C / S mode, the server part is decomposed into a database server and one or more application servers (Web server), which constitutes a 3-layer client-server system. multimedia teaching equipment information management system is mainly used in various classrooms and the office manager, design in larger quantities, so the use of B / S model as a software development mode, with the ASP scripting language. database using Microsoft Access, although not suitable for large sites Access database, but the amount of information for the design, has been completely meet the requirements. without any configuration of the client, through the IE browser that is able to to access the Web server in the form of the page. The system platform is shown in Figure 4.


3.4 system permissions
Zhejiang Vocational College of Economy multimedia teaching equipment management information system is the main use of personnel and school full-time administrative staff responsible for checking the work-study students, so the design staff to have access to the system access. The initial state by the "system administrator "In the system management module to assign permissions and settings. actual use of the system, the current access rights set up 4 categories:
(1) System Administrator: full access with the system;
(2) department heads: All inquiries with system privileges;
(3) Administrators: a routine inspection systems, equipment management systems, central control system and data query system access module 4;
(4) Inspection of students: the daily inspection system has only "inspection registration" rights.

4 Use and effectiveness
Zhejiang Economic Vocational and Technical College currently 119 multimedia classrooms input instruction to use, are used network monitoring and remote centralized management approach to achieve "open the door that is used, close and go." In the control room under the schedule arrangement, remote start multimedia classrooms, electricity automatic door locks open after the classroom teachers do not need one by one into the open device, simply open the door to use the podium in the preparation state of the multimedia device. one by one after use do not need to turn off the device, directly off the podium, all device will automatically shut down. classroom implementation of open management of all non-teaching time in classrooms, fully open to the students.

When the equipment failure or maintenance, require managers to log in through the network of multimedia teaching equipment management information system, complete equipment maintenance records in a timely manner a single recorded case of people such as fault conditions, and maintenance. If equipment replacement, the results should be modified according to changes in these devices data. different school buildings or different administrators can only modify their own management authority and recorded in the device, people can not be ultra vires recorded. managers can see immediately to the various multimedia classroom equipment usage and maintenance records, to grasp the device state, especially the use of the projector lamp time, so that timely replacement of the administrator to use the term light bulbs, to ensure normal teaching order.

Through the College survey of 100 teachers, classroom use of multimedia and management up to 95% satisfaction rate
5 Conclusion
Web-based B / S model of central control of multimedia teaching equipment and information management platform, through the campus local area network on campus to achieve a large number of multimedia classroom equipment for remote centralized control and automation management. The management platform designed to improve the utilization of teaching resources , management, staff efficiency and management level, and achieved fairly good results. In the future, but also using the system to develop new applications and continue to introduce new technologies, such as video surveillance system, recording system, so that the information management and application to a higher level. Links http://www.hi138.com Research Papers Download