Central control system Realizable resource sharing , audio and video transmission and mutual monitoring. Cooperate with computer, video disc player, video recorder, video booth and other modern audio-visual equipment, and centrally control electric curtains, lights, curtains and other equipment. Through large screen projection, create a modern multimedia audio-visual teaching environment with high definition, high fidelity and controlled audio-visual background. Imagine that in an important business meeting, you need to view, listen to and demonstrate computer images. Just press a button, and all operations will be automatically carried out: the screen drops, the curtain closes, the volume and light brightness are automatically adjusted, and the projector displays the desired picture. If you find this too ideal, you absolutely need a central control system.
IPad interface of central control system The demonstration room of an advertising company is absolutely the key to the success of a business contract. In meetings, there are often many different [2] Multi-Media Demo, more likely to replay the film at any time, Central control system It can provide perfect videos, DAT The control of recording, radio, television, computer images, and even other media allows speakers to fully engage in the content of their speeches without worrying about the operation of equipment. stay history museum Professional consultants hope to establish a suitable network to control audio-visual Multi-Media And computer equipment, which was impossible two years ago, now a new generation of control system can become a fact. Now, the civilian staff in the information desk can also connect to the network in the conference room, adjust the lights or carry out the whole demonstration process. With the continuous development of society, information exchange and communication become more and more frequent and important. A variety of audio-visual equipment, projection equipment, conference systems and so on began to enter all walks of life.
The current conference rooms, audio-visual teaching rooms, etc., are no longer a platform, a chair and a microphone, but are replaced by various advanced multimedia conference and teaching equipment. Such as: projector, DVD player, video recorder, video display stand Multimedia computer Some large conference rooms are also equipped with simultaneous interpretation systems, electronic voting systems, large screen projection, multi screen switching systems, etc. The use of a variety of devices will inevitably lead to complicated equipment operations. For example, to turn on the power supply of various equipment, to turn off the lights, to switch various audio and video signals frequently, and to constantly switch the projection picture wait. In this case, a "central control system" device that can centrally manage these devices and simultaneously control various resources in the conference room and classroom came into being. 1. Simple central control system: commonly used in primary school multimedia classrooms, mainly in places with less control equipment;
2. Intelligent central control system: commonly used in multimedia classrooms in universities and middle schools, it can control more equipment;
3. Network central control system: it is commonly used in schools with multiple central control systems, which is mainly convenient for management and control;
4. Conference central control system: usually used in multi-function conference rooms, usually controlled by wireless touch screen;
5: Programmable central control system: generally used in large conference rooms, with more control equipment, it can provide programming interface;
As a system, the central control system generally consists of four parts: 1 User interface; 2. Central control host; 3. Various control interfaces; 4. Controlled equipment.
It can be divided into the following modules:
·Audio/video switching module
·VGA computer signal switching module
·Infrared learning and transmitting module
·Equipment Power management modular ·Electric screen control module
·Voice and volume processing module
·Control interface processing module
·Power module
·Network module, etc. In addition to the specific functions of the above modules, the central control system can also add other control or communication functions through programming.
Central control system 2. It can control multiple devices at the same time. It can preview other audio and video sources while performing through the motor or projector
3. High integration, complete equipment control mode, clear operation interface, system Strong expansion function and high reliability. Low cost, high performance, high integration, full digital control. 4、 stand-alone Direct access: DVD player, video recorder, video display stand, camera, recording card holder, computer, notebook, power amplifier, wired microphone, wireless microphone, electric screen, projector, Power controller 。 (curtains and lights). 5. Full digital voice control, mixing, providing device expansion interface.
Central control system In order to simplify the work of operators and reflect the excellent functions of various devices as much as possible, the central control system realizes the centralized control of the above electronic devices through information intelligence technology. It can operate as needed without running back and forth between various devices, such as controlling the play, stop and pause of DVDs, controlling the start/stop and input switching of projectors, controlling the lifting and lowering of projection screens Stop, control the volume adjustment, control the input and output switching of the video and audio matrix, control the light on/off and intensity adjustment, control the opening and closing of curtains, etc.
1. Control of projection display system
It can be controlled by [4] RS232 Serial port , Control Projector All functions of, such as power on/off and input switching of video images and computer images, can automatically realize associated actions, such as automatically turning off the projector when the system is turned off. Through strong electricity relay It can control the rise, fall and stop of the electric hanger and the screen, and can automatically realize related actions. For example, when the projector is on, the electric hanger and the screen automatically fall, and when the projector is on, the electric hanger and the screen automatically rise. The video preview function of the control terminal can be used to confirm that the played video image is the required video image before the video is projected to the screen through the projector.
Through the RS232 serial port of the control host Video matrix To select the desired image to output to the projector. Control all actions of DVD and other devices, such as play, pause, stop and other functions, by controlling the infrared control port and infrared emission rod of the host, and automatically switch the DVD image to the projector, which automatically selects video input and automatically switches the DVD sound to power play.
The volume controller controls the output volume of the amplifier.
3. Control of room environment system
Through the strong current relay, the switch of the fluorescent lamp can be controlled, and various light modes can be preset (such as conference mode, A/V mode, training mode, etc.), so that the light can meet the needs of various applications.
Control the opening/closing of curtains through strong current relay to meet the needs of various applications.
Control the power supply of projector and A/V equipment through strong current relay to realize automatic and energy-saving management of power supply. Some products can also better protect the equipment. For example, the system will reserve enough time for the projector to cool down after the projector is turned off, and then automatically disconnect the power supply of the projector.
Attention shall be paid to the following aspects when selecting the central control system:
First, the system should be stable and reliable. The purpose of installing the central control system is to simplify the operation, so that the staff can easily control all kinds of equipment and achieve twice the result with half the effort. If the system is unstable, it can not simplify the operation, but will affect the use effect. Therefore, quality should be put first rather than price in the selection.
Secondly, pay attention to the systematic Openness And compatibility. Simple installation, easy upgrade, easy to add and replace equipment; The control interface is simple, clear, and easy to operate. Finally, attention should be paid to multiple control operation modes. At present, most control systems have touch screen, software, manual control panel and handheld Remote control 。 The computer operation level of different users is inconsistent. Some users are not familiar with computer operation and can use handheld control panel 、 touch screen 、 Remote control Etc. 
