Design principle and application of conference controller
With the continuous development of society, information exchange and communication become more and more frequent and important.
Various audio-visual equipment, projection equipment, conference controller system and so on began to enter all walks of life.
The current conference room and classroom are not a podium, a chair and a microphone, but all kinds of advanced multimedia conference teaching equipment.
Such as projectors, DVD players, video recorders, video display stands, multimedia computers and electronic screens. Some large conference rooms are also equipped with simultaneous interpretation system, electronic voting system, large screen projection system and multi-screen switching system.
The use of a variety of equipment will inevitably lead to the complexity of equipment.
Such as: turn on the power of various devices, turn off the lights, frequently switch various audio and video signals, and constantly switch projection images.
In this case, a kind of "central control" equipment came into being, which can centrally manage these devices and control all kinds of resources in conference rooms and classrooms at the same time.
First, the working principle of the conference controller:
The central control system adopts multi-computer communication technology and system integration technology, combines the controlled devices according to the actual requirements of users, and then integrates the final working process of each device into a simple working process.
In short, the central control can centrally control video recorders, matrices, VGA matrices, DVD players, video booths, projectors, electric screens, electric curtains, lighting and other equipment.
Second, the basic composition of the conference controller:
Host: Its function is to receive, interpret and execute the control signals of the touch screen.
Color LCD touch: you can preview the video directly, which is completely programmed, simple and fast.
Embedded panel: usually installed at the door for easy access.
Volume control module: used to control audio equipment.
Incandescent lamp dimmer: used to control and adjust lighting equipment.
High voltage relay module: used to control electric hanger, screen, equipment power supply, fluorescent lamp and other equipment.
Infrared emitter: used to control infrared devices such as DVD/VCR/ physical exhibition stand.
External power supply: used to supply power to all equipment.
Three, the classification of conference controller:
1, simple conference controller:
(1) Built-in infrared learning function, no need to configure professional learners, and adopt one-button linkage control management function; Support computer software and panels;
(2) Built-in 4×2VGA switch distributor, 400MHZ long-line drive, supporting desktop computer, notebook computer, digital booth and digital DVD input;
Equipped with projector protector, it can detect the working state of projector bulb (this function can be realized after selecting network function) and automatically delay power off.
Better protect the life of the projector;
(3) Built-in 2×2 video matrix with video bandwidth of100 MHz; ;
1 programmable RS-232 control interface, which can be used to control the projector;
(4) 2-way I/O control interface with anti-theft function of projector, which can be connected with door magnetic switch to realize interlocking control;
2 infrared emission interfaces, which can control the projector through infrared self-learning; 2 MIC inputs, convenient for users to explain;
(5) Built-in 2-way high-fidelity stepless volume adjustment.
Built-in network module slot (optional network module control block) supports remote network control;
(6) The control panel is provided with a network interface, a 2-way USB interface, a microphone interface, a notebook computer stereo, a notebook VGA port and a dustproof cover;
(7) The strong and weak current are separated, and the power box is controlled by the built-in electric screen power supply, and the power supply of two-way equipment is controlled (two-way sequential power supply, 1 way watchdog projector special power supply);
(8) Adopt professional power supply, input 12V/2A, and the performance is more stable.
Commonly used in multimedia classrooms in primary schools, mainly in places with few control equipment;
2. Intelligent conference controller:
(1) Built-in infrared learning function, no need to configure professional learners, and adopt one-button linkage control management function; Support computer software and group work.
(2)6 independent programmable infrared emission interfaces, which can remotely control multiple infrared remote control devices;
Built-in projector bulb detection delay circuit realizes electric screen linkage and fully protects the projector;
(3) Built-in 6x2 video matrix switching, video bandwidth
Up to100 MHz; ; 8×2 audio matrix switching; 4×2
400MHz long-line driver VGA signal switching;
(4) Built-in 2 microphone inputs; 2-channel high-fidelity stepless volume adjustment, microphone and total volume can be controlled independently;
(5) The control panel is displayed with the function of LED long-life lamp, which is beautiful and elegant; C++ version control software fully supports Windows9x/2000/XP/NT as a system;
(6) Built-in intelligent safety alarm system (optional)
(7) After selecting the network function, all the equipment in the classroom can be remotely controlled, and the status can be intuitively fed back to control the batch processing in the remote classroom equipment; Remotely record that service time of the projector bulb;
(8) Strong and weak current are separated, and the power box has built-in electric screen power control and 2-way equipment power control (2-way sequential power supply and 1 way dedicated power supply for watchdog projector); Special power supply is adopted, and the input is 12V/2A, so the performance is more stable.
Generally used in multimedia classrooms in universities and middle schools, it can control more equipment;
3. Integrated conference controller:
(1) adopts the latest embedded processor;
(2) The host has built-in 128MB DDR2 memory and 16MB flash memory;
(3) Using programmable logic circuit (FPGA), the performance is more stable;
(4) The user interface is beautiful and friendly, and pictures, icons and words can be edited freely;
(5) Support remote network connection and local control;
(6) Automatic identification of infrared type, using 64-bit learning storage; Sensitive and easy to use;
(7)5+2 programmable RS-232 and 1 RS-485 control interfaces;
(8) Eight independent programmable infrared emission interfaces, each infrared channel supports 80 key codes;
(9) Built-in 6×3VGA matrix (bandwidth 500MHZ) and 8×3 matrix (100MHZ) can be used for asynchronous switching;
(10) 1 full frequency volume control;
(1 1) dual microphone input with volume adjustment;
(12) supports one-click operation, with a pure Chinese interface, which is simple and easy to operate;
(13) The network is powerful, and you can freely choose the TCP/IP protocol server or client mode;
(14) is controlled by object-oriented bus protocol, and the control module can be extended at will, such as multiple dimmers, (15) multiple radio frequency wireless receivers, multiple power controllers, etc. , which can support up to 256 network devices;
(16) fully supports third-party equipment and control protocols, and customers can set various control protocols and protocols by themselves;
(17) Adopt internationally popular SMT production technology;
(18) High quality, mass production, high compatibility and stability, high cost performance;
(19) supports wireless touch screen, wired touch screen, keyboard, computer, network, wall panel, etc.
Control mode;
(20) Compatible with mainstream control equipment in the market.
Generally used in multi-functional conference rooms, generally controlled by wireless touch screen;
4. Programmable conference controller:
(1) adopts the most embedded processor;
(2) The host has built-in 128MB DDR2 memory and 16MB flash memory;
(3) Using programmable logic circuit (FPGA), the performance is more stable;
(4) Beautiful and friendly control user interface, supporting remote network connection and local control;
(5) Automatic identification of infrared type, using 64-bit learning storage; Sensitive and easy to use;
(6) 16 programmable RS-232 and 8 485 control interfaces;
(7) Eight independent programmable infrared transmitting interfaces, each infrared channel supports 80 key codes;
(8) Support multi-generation control, that is, one key can generate multiple generations (IR, RS-485, RS-232);
(9) It has powerful network functions and can freely choose the TCP/IP protocol server or client mode;
(10) is controlled by object-oriented bus protocol, and the control module can be extended at will, such as multiple dimmers and multiple.
(1 1) RF wireless receiver, multiple power controllers, etc. , which can support up to 256 network devices;
(12) fully supports third-party equipment and control protocols, and customers can set various control protocols and protocols by themselves;
(13) Adopt internationally popular SMT production technology;
(14) high quality, mass production, high compatibility and stability, high cost performance;
(15) simultaneously supports various control modes such as wireless touch screen, wired touch screen, computer, network, wall panel, etc.
(16) compatible with mainstream control equipment in the market.
Generally used in large conference rooms, with many control devices and programmable interfaces;
Fourth, the structure of the conference controller:
A conference controller generally consists of four parts: 1.
User interface; 2. Central control host; 3. Various control interfaces; 4. Controlled equipment.
Specifically, it can be divided into the following modules:
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Audio and video switching module
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VGA computer signal conversion module
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Infrared learning transmitting module
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Equipment power management module
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Electric screen control module
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Timbre and volume processing module
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Control interface processing module
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power-supply module
The conference controller can not only complete the specific functions of the above modules, but also add other control or communication functions through programming.
Verb (abbreviation of verb) Characteristics of conference controller:
Various user-made interfaces.
(standard PC, LCD touch screen, manual control panel): personalized control interface design makes you convenient and handy.
At the same time, all audio-visual equipment can be seen at a glance.
Multiple devices can be controlled at the same time.
Other audio and video sources can be previewed when the performance is performed by a motor or projector.
High integration, complete equipment control mode, clear interface, strong system expansion function and high reliability.
Low cost, high performance, high integration and full digital control.
Stand-alone direct access: DVD player, video recorder, video display stand, video camera, recording card holder, computer, notebook, power amplifier, wired microphone, wireless microphone, electric screen, projector and power controller.
Curtains and lights.
Fully numerical control sound, mixing and equipment expansion interface.
Application of intransitive verb conference controller
Conference controllers are generally used in multimedia conference rooms, audio-visual classrooms, monitoring and military command centers, news release rooms, environmental control and so on.
Taking the multimedia classroom as an example, the central controller is the control center of all audio-visual teaching equipment.
All audio-visual teaching equipment in the classroom, such as video recorders, DVD players, projectors, electric screens, stereos, indoor lighting and curtains, can be connected to and controlled by the central controller.
Users only need to sit in front of the touch screen, they can intuitively make the whole system, including system switching, equipment switching, lighting brightness level, signal switching, signal source playing and stopping, various combination modes entering and switching, volume adjustment and conference sound system amplifying; Digital conference and simultaneous interpretation system for discussion, voting and voting; Video conference system for teleconference; Large screen projection system for video and VGA signal display; Multimedia peripherals for audio and video signals; Used for automatic integrated control of global environmental facilities, system equipment control and other systems.