With the rapid development of technology and the expansion of uses, the accuracy of cameras is getting higher and higher, and the degree of automation is becoming stronger and stronger. Now digital classrooms have developed into an advanced method for teaching quality inspection and communication in schools and other training institutions. It can provide principals and leaders in charge of teaching work with a set of credible materials for the whole teaching process, especially for the two-way promotion of training young teachers. It is an advanced means to improve the quality of teaching and demand results in 45 minutes.
The digital classroom is based on a color camera controlled by an electric pan-tilt, equipped with a multi-fold three-variable lens (electric adjustment of aperture, distance, magnification), and a highly sensitive pickup. It is a convenient and practical video recording system.
The campus monitoring system is a comprehensive system composed of multiple digital classrooms. By setting up cameras, pickups, speakers and other equipment in important locations in each classroom and campus, you can see every corner of the campus at a glance. It is a collection of teaching and management An advanced audio and video transmission system.
The combination of this system and the closed-circuit television system can enable each classroom to communicate with each other in audio and video, which is not only conducive to the exchange of teaching content, but also conducive to the teaching administration and examination management. The cultivation of teachers plays an important role.
(1) Main functions of campus monitoring (principal assessment) system:
1. The management personnel can monitor, monitor and talk to any classroom, which is convenient for the management of exams, etc .;
2. Except for the teachers and students in the classroom, there are no other filming and listening personnel. The whole set of work is completed by the cameras and high-sensitivity microphones installed on the front, rear and ceiling, and the class personnel do not feel any interference;
3. The main control room can control the lens in any classroom for all-round (360 °) rotation, zoom, variable distance, and close-up shooting;
4. Multiple monitors monitor the shooting pictures of different cameras, and monitor and record the teaching process from different directions in the classroom;
5. The control personnel can take a full range of shooting and video recording of the teachers' teaching methods, voice, blackboard writing and student activities in the classroom;
6. The main control indoor application video host can record the observation of any classroom;
7. The control personnel can operate the electric pan / tilt, multiple zoom lens to take close-up shots of teacher actions, student responses, and blackboard content;
8. Campus plan can be made in the main control computer, which can easily pull the content of the camera at any point into the screen instantly;
9. Can synchronously record the sound in the classroom;
10. Record all monitoring points in the main campus;
11. The main control room can organize the management personnel to listen to the class of a certain class, without affecting the normal class of the class;
12. The deputy control (master's room, conference room) has the above functions;
13. Intercom function, when monitoring (student self-study, when there is no teacher) found that the classroom discipline is scattered, the main and deputy controls can speak to the class;
14. The control personnel can process the recorded data to make the teaching content into teaching courseware;
15. Combined with closed-circuit television system to achieve audio and video transmission.
16. Personnel in the classroom can use the button to request intercom with the management center.
(two). The main purpose of campus monitoring system:
1. Monitor the discipline of each class during the exam;
2. Supervise the discipline during the self-study classes;
3. Monitoring of various confidential institutions such as finance and warehouse;
4. Monitor teachers 'class situation, understand teachers' teaching attitude, characteristics, advantages and disadvantages;
5. Organize teachers to listen to a class;
6. Combined with closed-circuit television system, each classroom situation can be relayed to each other;
7. Anti-theft monitoring;
8. Live video of important courses of excellent teachers to facilitate other teachers to observe and learn;
9. Demonstration class for external teachers
10. Organize the teaching management personnel and subject leaders to listen to the young teachers in the main control room, record the advantages, disadvantages, and practical problems to compare and improve after class
11. The experimental class of the professional teaching and research group and the discussion and modification of the class by the teaching and research group;
12. Retain the information of key school courses;
13. Major school activities such as foreign experts and scholars are invited to give lectures and conduct political and ideological education and patriotism education;
14. Combine with CCTV system to broadcast the activities and courses of digital classroom to the whole school live;
15. Recording of outstanding public classes evaluated by the school's audio-visual teaching center;
16. The school keeps files and exchanges of information between brother schools.
17. Connect the campus network with the Internet, and under the premise of having authority, you can monitor any monitoring point in the school anywhere in the world.
(3) The principle of campus monitoring system
The campus monitoring system is mainly composed of four parts: camera part, transmission part, control part and display record part. The camera part includes a color camera (including three variable lenses), indoor omni-directional gimbal, dust cover, etc .; the transmission part is mainly composed of a video server; the control part includes image switching, motion control, etc.
(1) Camera section
The camera part is the forefront part of the TV monitoring system and the "eye" of the entire system. The camera converts the monitored content into image signals, and transmits the digital audio and video signals to the monitoring and storage equipment of the control center through the video server. The camera part is the original signal source of the system. The quality of the camera part and the quality of the generated image affect the quality of the entire monitoring system. Therefore, the TV monitoring system uses a color camera all-in-one machine with high definition and good sensitivity; it uses three variable lenses of aperture, focus, and zoom; and it uses an electric room that rotates 350 ° in the horizontal direction and ± 45 ° in the vertical direction Use gimbal; adopt a dust cover with anti-theft, anti-vandalism and strong anti-dust performance, etc.
(2) Transmission part
The transmission part of the TV monitoring system is mainly composed of the transmission of image signals, the transmission of sound signals, and the transmission of control signals that control cameras, lenses, and pan / tilts. In this scheme, we take into account some specific circumstances of the school, we will use the video server of Jiaante Digital Technology Co., Ltd. to transmit images, sounds and control signals. The main advantage is that the images will not be generated after transmission. Noise distortion can ensure the clarity and gray level of the original image signal, mainly using the school's existing LAN to enter
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