The utility model content
The purpose of this utility model is: the problem and shortage for prior art exists, a kind of easily Multimedia Classrooms central control device easy and simple to handle is provided, and make things convenient for the teacher to utilize multimedia equipment to impart knowledge to students.
The technical solution of the utility model is: Multimedia Classrooms central control device of the present utility model, and its design feature is: comprise PC, control performance element, the button of giving a lesson, finish class button and equipment general supply; Above-mentioned PC is the personal computer that is built-in with centralized control system software; The control performance element is provided with single-chip microcomputer, communication interface and device power supply (DPS) switch control end, and single-chip microcomputer has the end of patrolling and examining; The control performance element is by the electrical connection of communicating by letter with PC of its communication interface; The power switch of button and PC is connected in parallel on class; Button is electrically connected with the end of patrolling and examining of the single-chip microcomputer of control performance element after class.
Further scheme is: above-mentioned on class button and the button of finishing class are the contact button; Button and the button of finishing class all are arranged on the dais in classroom on class.
The utlity model has positive effect: Multimedia Classrooms central control device of the present utility model only has " giving a lesson " and steps down two buttons at the dais, the teacher only needed by the button of once " giving a lesson " upper class hour to begin, and each the relevant teaching equipment in the multi-media classroom is namely automatically ready; Only need by the button of once stepping down when having a class, each relevant teaching equipment is autoshutdown, has made things convenient for the teacher to utilize the multimedia equipment teaching, and is time saving and energy saving, improves teaching efficiency.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model, has also drawn the part teaching equipments such as the projector that is connected with the utility model device, projection screen among the figure;
The function interface block diagram that shows screen display when Fig. 2 is the built-in centralized control system running software of the PC among Fig. 1 at PC.
Reference numeral in the above-mentioned accompanying drawing is as follows:
PC 1, control performance element 2, the button 3 of giving a lesson, the button 4 of finishing class, equipment general supply 5, projector 6, projection screen 7.
Embodiment
(embodiment 1)
See Fig. 1, the Multimedia Classrooms central control device of present embodiment by PC 1, control performance element 2, on class button 3, button 4 and equipment general supply 5 form after class.Equipment general supply 5 provides power supply for the teaching equipment that comprises projector 6, projection screen 7, power amplifier, microphone etc. in the classroom.But the power supply of PC 1 and control performance element 2 is provided by civil power.
PC 1 is general personal computer, and be built-in with centralized control system software in this PC 1, this software is when PC 1 interior operation, its function interface that shows screen display at PC as shown in Figure 2, comprise video signal functions bar, rgb signal function bar, projector closing function bar, projector open function bar, projection screen rising function bar and projection screen decline function bar etc., teacher clicks relevant function bar, and PC 1 namely sends the instruction of carrying out corresponding function to control performance element 2.
Control performance element 2 is provided with single-chip microcomputer, 2 RS232 communication interfaces and device power supply (DPS) switch control end, projection screen Electric Machine Control output terminal.Single-chip microcomputer has the end of patrolling and examining.The button 3 of giving a lesson is the contact button with the button 4 of finishing class, and button 3 and the button 4 of finishing class all are arranged on the dais in classroom on class.
Control performance element 2 is electrically connected with the PORT COM of PC 1 by its RS232 communication interface; Button 3 also is the power switch of PC 1 on class; Button 4 is electrically connected with the end of patrolling and examining of the single-chip microcomputer of control performance element 2 after class;
The Multimedia Classrooms central control device of present embodiment in use, the switch of device power supply (DPS) switch control end and the equipment general supply 5 of control performance element 2 opens and closes end and is electrically connected, and controls the opening and closing of performance element 2 opertaing device general supplies 5; Control performance element 2 is electrically connected by the communication port of the projector 6 in its 2nd RS232 communication port and the classroom, the projection screen Electric Machine Control output terminal of control performance element 2 is electrically connected with the controlled end of the control electric system of projection screen 7, and control performance element 2 passes through the open and close of opertaing device general supply 5 and then controls the opening and closing of the teaching equipments such as power amplifier, microphone.
The Multimedia Classrooms central control device course of work of present embodiment such as following:
The teacher begins upper class hour, only need by the button 3 of once giving a lesson, PC 1 starts, automatically move its built-in centralized control system software, the instruction that PC 1 sends opening device general supply 5 according to the program of software setting to control performance element 2, control performance element 2 opertaing device general supplies 5 are opened, thereby make the teaching equipments such as the control electric system that comprises projector 6, projection screen 7, power amplifier, microphone get electric.PC 1 sends the instruction of opening projection screen 7 according to the program of software setting to control performance element 2 subsequently, and the control electric system operation of control performance element 2 controlling projection curtains 7 makes projection screen 7 drop to the correct position of setting.Send at last RGB Computer signal switching command, be projected on the projection screen 7 by the screen content of projector 6 with the PC display screen, all devices is all in running order, for the teacher.
When class-teaching of teacher finishes, only need by the button 4 of once finishing class, the single-chip microcomputer of control in the performance element 2 patrolled and examined end by it and detected after button 4 is pressed after class, at first notify PC 1 shutdown, secondly the control electric system of controlling projection curtain 7 operation makes projection screen 7 rise to the correct position of setting, when predefined 3 minutes arrive in the single-chip microcomputer, control performance element 2 closing device general supplies 5, thus each teaching equipment power supply is all closed.
If need to close projector, rising projection screen in teacher's process at school, can double-click system's control icon on PC 1 display screen, click the function bar of corresponding function on the system interface and can finish associative operation.
The function interface of centralized control system software is hidden the taskbar to PC 1 automatically after system's startup, function interface again can be on the display screen of PC 1 behind the double-click icon, can automatically hide to taskbar again after click minimizes.For preventing maloperation, the teacher can't manual-lock centralized control system software.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is in the situation that does not break away from spirit and scope of the present utility model; can also make various conversion and obtain the corresponding technical scheme that is equal to variation, so all technical schemes that are equal to all should be included into scope of patent protection of the present utility model.