CN206312118U

CN206312118U - A kind of control system of all-in-one machine for multimedia teaching

Info

Publication number: CN206312118U
Application number: CN201621443857.1U
Authority: CN
Inventors: 郭喜国; 郭喜强; 严万文
Original assignee: Fujian Pulse Education Polytron Technologies Inc
Current assignee: Fujian Pulse Education Polytron Technologies Inc
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2017-07-07
Anticipated expiration: 2026-12-27

Abstract

The utility model is related to a kind of control system of all-in-one machine for multimedia teaching, including VGA switching control modules, the VGA switching controls module includes that the first USB interface, the second USB interface, latch, video switch, double four select a data selector and the 3rd USB interface；By the VGA handover modules in the control system of all-in-one machine for multimedia teaching, first USB interface is connected to computer, the 3rd USB interface is connected on external display screen again, by latch, the control that video switch selects a data selector with double four, the content of courses played will be needed to play on external display screen, and notebook computer can be connected to by the second USB interface, the content of courses on notebook computer can also be played out on externally connected with display screen, as long as shirtsleeve operation can just realize the broadcasting of the content of courses, reduce due to the mistake that misoperation occurs.

Description

A kind of control system of all-in-one machine for multimedia teaching

Technical field

The utility model is related to a kind of multimedia teaching field, the control system of more particularly to a kind of all-in-one machine for multimedia teaching System.

Background technology

In modern education field, with continuing to develop for computer technology, the continuous progress of the modern process of education skill, Multimedia teaching is essential as a kind of advanced teaching means.Various kinds of schools and academic unit, are all building many matchmakers Body classroom or multifunctional hall.Multimedia teaching integrates the media such as sound, image, video and word, can have as one kind The CAI means of effect, and can the content that will be presented intuitively show, it is convenient that it is understood, can reach Knowledge, tap intellectual resources and the purpose for cultivating one's ability are taught, and the purpose taught students in accordance with their aptitude with individualized teaching can be realized, therefore received deeply Teachers and students and the favor of academic unit.But present all-in-one machine for multimedia teaching is all connected directly to main frame, lead to Cross main frame to be operated, and in this operating process, the problem of misoperation usually occur.

Utility model content

For this reason, it may be necessary to provide a kind of simple to operate, the control system of the all-in-one machine for multimedia teaching that misoperation occurs is reduced System.

To achieve the above object, a kind of control system of all-in-one machine for multimedia teaching, including VGA switchings are inventor provided Control module, the VGA switching controls module includes the first USB interface, the second USB interface, latch, video switch, double four Select a data selector and the 3rd USB interface；

The RED ends of first USB interface connect the 3B1 ends of video switch, and the Green ends of first USB interface connect The 2B1 ends of video switch are connect, the Blue ends of first USB interface connect the 1B1 ends of video switch, first USB interface Row synchronization HSYNC ends connection double four select the field synchronization VSYNC ends of the end of a data selector 212, first USB interface to connect Double four select the end of a data selector 112, the digitally SCND ends of first USB interface, red ground RGND ends, greenery patches GGND ends, Blue ground BGND ends and ground connection GND ends ground connection；

The RED ends of second USB interface connect the 3B1 ends of video switch, and the Green ends of second USB interface connect The 2B1 ends of video switch are connect, the Blue ends of second USB interface connect the 1B1 ends of video switch, second USB interface Row synchronization HSYNC ends connection double four select the field synchronization VSYNC ends of the end of a data selector 212, second USB interface to connect Double four select the end of a data selector 112, the digitally SCND ends of second USB interface, red ground RGND ends, greenery patches GGND ends, Blue ground BGND ends and ground connection GND ends ground connection；

Described double four select the S0 ends of a data selector to connect latch 1D ends, and described double four select the S1 of a data selector The 2D ends of end connection latch, described double four select a data selector 2Y ends to connect the row synchronization HSYNC ends of the 3rd USB interface, The field synchronization VSYNC ends of described double four the 3rd USB interfaces of 1Y ends connection for selecting a data selector；

The 1Q ends of the latch connect the S1 ends of video switch, and the 2Q ends of the latch connect the S2 of video switch End；

The A1 ends of the video switch connect the BLUE ends of the 3rd USB interface, the 2A ends connection the 3rd of the video switch The GREEN ends of USB interface, the 3A ends of the video switch connect the RED ends of the 3rd USB interface.

Further optimization, also including voice control module, the voice control module includes the first COBBAIF, the second sound Frequency interface, audio effect processing chip, the 3rd COBBAIF, volume control chip, operational amplifier and two-channel power amplifier chips；It is described The L channel output LINT ends of the first COBBAIF connect the LIN1 ends of audio effect processing chip, the right sound of first COBBAIF Road output end RINT ends connect the RIN1 ends of audio effect processing chip；The L channel LINT ends connection audio of second COBBAIF The LIN2 ends of process chip, the R channel RINT ends of second COBBAIF connect the RIN2 ends of audio effect processing chip；It is described The first input end of the LFOUT ends concatenation operation amplifier of audio effect processing chip, the RFOUT ends connection of the audio effect processing chip Second input of operational amplifier, the first output end of the operational amplifier connects the IN1 ends of two-channel power amplifier chips, institute The second output end for stating operational amplifier connects the IN2 ends of two-channel power amplifier chips；The L channel of the 3rd COBBAIF is defeated Go out the IN1 ends of end connection volume control chip, the R channel output end connection volume control chip of the 3rd COBBAIF IN2 ends, the first input end of the VOUT1 ends concatenation operation amplifier of the volume control chip, the volume control chip Second input of VOUT2 ends concatenation operation amplifier.

Further optimization, also including key control module, the key control module includes a VGA switch keys, second VGA switch keys, the first volume adjusting key, the second volume adjusting key, the 3rd volume adjusting key and the 4th volume adjusting key；Described The S0 ends of a data selector are selected in one VGA switch keys connection double four, and the 2nd VGA switch keys connection double four selects a data to select The S1 ends of device, first volume adjusting is bonded the DATA ends for connecing audio effect processing chip, and second volume adjusting is bonded and connects sound The CLK ends of process chip are imitated, the 3rd volume adjusting is bonded the DATA ends for connecing volume control chip, the 4th volume adjusting It is bonded the CLK ends for connecing volume control chip.

Further optimization, also including power regulator module, the power regulator module voltage-stablizer LM2574, voltage-stablizer LM7809 and voltage-stablizer 1117-3.3；The VIN ends external power supply of the voltage-stablizer LM2574, the voltage-stablizer LM2574's The POWER/GND ends of bridging coil L1 between OUTPUT ends and FB ends, the voltage-stablizer LM2574, ON/OFF ends and SIG GND A data selector is selected in end ground connection, the FB ends connection double four of the voltage-stablizer LM2574；The IN ends of the voltage-stablizer 1117-3.3 The FB ends of connection voltage-stablizer LM2574, the power end of the OUT terminal connection latch of the voltage-stablizer 1117-3.3, video switch The power end of power end and volume control chip；The IN ends connection external power supply of the voltage-stablizer LM7809, the voltage-stablizer The first input end that the OUT terminal of LM7809 passes through resistance R54 concatenation operation amplifiers, the OUT terminal of the voltage-stablizer LM7809 leads to The second input of resistance R59 concatenation operation amplifiers is crossed, the OUT terminal connection audio effect processing chip of the voltage-stablizer LM7809 Power end.

Further optimization, also including one turn of two module of serial ports, one turn of two module of the serial ports includes first serial, the second string Mouth and the 3rd serial ports, the RXD ends and the RXD ends of the 3rd serial ports of the RXD ends connection second serial of the first serial, described first The TXD ends and the TXD ends of the 3rd serial ports of the TXD ends connection second serial of serial ports.

Prior art is different from, the VGA in control system that above-mentioned technical proposal passes through all-in-one machine for multimedia teaching switches Module, computer is connected to by the first USB interface, then the 3rd USB interface is connected on external display screen, by latching Device, video switch and double four select the control of a data selector, it would be desirable to which the content of courses of broadcasting is played in external display screen On, it is possible to notebook computer is connected to by the second USB interface, it is also possible to by the content of courses on notebook computer external Played out on display screen, as long as shirtsleeve operation can just realize the broadcasting of the content of courses, reduced because misoperation occurs Mistake.

Brief description of the drawings

Fig. 1 is a kind of structure of the VGA switching control modules of the control system of the utility model all-in-one machine for multimedia teaching Schematic diagram；

Fig. 2 is a kind of structural representation of the voice control module of the control system of the utility model all-in-one machine for multimedia teaching Figure；

Fig. 3 is a kind of structural representation of the key control module of the control system of the utility model all-in-one machine for multimedia teaching Figure；

Fig. 4 is a kind of structural representation of the power regulator module of the control system of the utility model all-in-one machine for multimedia teaching Figure；

Fig. 5 shows for a kind of structure of one turn of two module of serial ports of the control system of the utility model all-in-one machine for multimedia teaching It is intended to.

Specific embodiment

To describe technology contents of the present utility model, structural feature, the objects and the effects in detail, below in conjunction with implementation Mode simultaneously coordinates accompanying drawing to be explained in detail.

Refer to Fig. 1, a kind of control system of all-in-one machine for multimedia teaching of the utility model, including VGA switching control moulds Block, the VGA switching controls module includes that the first USB interface, the second USB interface, latch, video switch, double four select a number According to selector and the 3rd USB interface；

The 8D latch 74ls373 that the latch is exported using Three-State, video switch uses the tunnel three of high bandwidth three A video switch FSAV43 is selected, double four select a data selector to select a data selector 74HC153D using double four.

First USB interface is connected on computer, the 3rd USB interface is connected on externally connected with display screen, a VGA connects Mouth receives the broadcasting content of computer transmission, by the tunnel one-out-three video switch FSAV43 of high bandwidth three, eliminates in showing and leads to Minimize for signal insertion loss to channel noise and ghost effect by road, by the 8D latch that Three-State is exported The caching of 74ls373, then played out on externally connected with display screen；And pass through that notebook electricity can be connected to by the second USB interface On brain, by double four a data selector 74HC153D can be selected to carry out selection the first USB interface of connection and the second USB interface is carried out The content on computer or the content on notebook computer are played in selection.

By the VGA handover modules in the control system of all-in-one machine for multimedia teaching, the first USB interface is connected to calculating Machine, then the 3rd USB interface is connected on external display screen, select a data to select by latch, video switch and double four The control of device, it would be desirable to which the content of courses of broadcasting is played on external display screen, it is possible to be connected to by the second USB interface Notebook computer, it is also possible to the content of courses on notebook computer is played out on externally connected with display screen, as long as simple behaviour Work can just realize the broadcasting of the content of courses, reduce due to the mistake that misoperation occurs.

Fig. 2 is referred to, in the present embodiment, in order to further provide for the function of sound broadcasting, also including sound control mould Block, the voice control module includes the first COBBAIF, the second COBBAIF, audio effect processing chip, the 3rd COBBAIF, sound Amount control chip, operational amplifier and two-channel power amplifier chips；The L channel output LINT end connections of first COBBAIF The LIN1 ends of audio effect processing chip, the R channel output end RINT ends connection audio effect processing chip of first COBBAIF RIN1 ends；The L channel LINT ends of second COBBAIF connect the LIN2 ends of audio effect processing chip, and second audio connects The R channel RINT ends of mouth connect the RIN2 ends of audio effect processing chip；The LFOUT ends concatenation operation of the audio effect processing chip is put The first input end of big device, the second input of the RFOUT ends concatenation operation amplifier of the audio effect processing chip, the computing First output end of amplifier connects the IN1 ends of two-channel power amplifier chips, and the second output end connection of the operational amplifier is double The IN2 ends of sound channel power amplifier chips；The L channel output end of the 3rd COBBAIF connects the IN1 ends of volume control chip, institute The R channel output end for stating the 3rd COBBAIF connects the IN2 ends of volume control chip, the VOUT1 ends of the volume control chip The first input end of concatenation operation amplifier, the second input of the VOUT2 ends concatenation operation amplifier of the volume control chip End.The audio effect processing chip uses audio effect processing chip PT2313L, volume control chip to use two-channel volume control chip M62429, operational amplifier uses high-performance low-noise dual operational amplifier NE5532, two-channel power amplifier chips to use two-channel Power amplifier chips TDA7297, carries out receiving computer or notebook computer by the first COBBAIF or the second COBBAIF The sound of upper broadcasting is after audio effect processing chip PT2313L carries out audio effect processing to the sound played then low by high-performance After noise dual operational amplifier NE5532 carries out preposition enhanced processing, by two-channel power amplifier chips TDA7297 be amplified with Drive the speaker sends sound, it is also possible to connect microphone by the 3rd interface, it is right to be carried out by two-channel volume control chip After sound is processed, after high-performance low-noise dual operational amplifier NE5532 carries out preposition enhanced processing, by alliteration Road power amplifier chips TDA7297 is amplified and sends sound with drive the speaker, the need for meeting sound broadcasting.

Fig. 3 is referred to, it is in the present embodiment, described also including key control module in order to further reduce operating procedure Key control module includes a VGA switch keys, the 2nd VGA switch keys, the first volume adjusting key, the second volume adjusting key, the Three volume adjusting keys and the 4th volume adjusting key；The S0 ends of a data selector, institute are selected in the first VGA switch keys connection double four The S1 ends that a data selector is selected in the 2nd VGA switch keys connection double four are stated, first volume adjusting is bonded and connects audio effect processing core The DATA ends of piece, second volume adjusting is bonded the CLK ends for connecing audio effect processing chip, and the 3rd volume adjusting is bonded and connects sound The DATA ends of control chip are measured, the 4th volume adjusting is bonded the CLK ends for connecing volume control chip.By by module, according to Different demands, select different buttons carry out to the regulation for playing content to meet difference the need for, and by key-press module Operation, further reduce operation mode, it is simple and convenient, reduce misoperation generation.

Fig. 4 is referred to, in the present embodiment, in order to provide all parts stable operating voltage, also including power supply voltage stabilizing mould Block, the power regulator module voltage-stablizer LM2574, voltage-stablizer LM7809 and voltage-stablizer 1117-3.3；The voltage-stablizer LM2574 VIN ends external power supply, bridging coil L1, the voltage-stablizer between the OUTPUT ends and FB ends of the voltage-stablizer LM2574 The POWER/GND ends of LM2574, ON/OFF ends and SIG GND ends ground connection, double four choosings of FB ends connection of the voltage-stablizer LM2574 One data selector；The IN ends of the voltage-stablizer 1117-3.3 connect the FB ends of voltage-stablizer LM2574, the voltage-stablizer 1117- The power end of the power end, the power end of video switch and volume control chip of 3.3 OUT terminal connection latch；The voltage stabilizing The IN ends connection external power supply of device LM7809, the OUT terminal of the voltage-stablizer LM7809 is by resistance R54 concatenation operation amplifiers First input end, the OUT terminal of the voltage-stablizer LM7809 passes through the second input of resistance R59 concatenation operation amplifiers, described The OUT terminal of voltage-stablizer LM7809 connects the power end of audio effect processing chip.External power supply uses 12V, by different voltage-stablizers After carrying out voltage stabilizing treatment, the electricity consumption requirement further according to different components carries out providing corresponding voltage, makes each device operating voltages Stabilization, makes each device work more and stablizes.

Refer to Fig. 5, in the present embodiment, in order to meet more cross connection serial ports the need for, also including one turn of two mould of serial ports Block, one turn of two module of the serial ports includes first serial, second serial and the 3rd serial ports, and the RXD ends of the first serial connect The RXD ends of second serial and the RXD ends of the 3rd serial ports, the TXD ends of the first serial connect the TXD ends and the 3rd of second serial The TXD ends of serial ports.By one turn of two conversion of module of serial ports, say that a serial ports is converted into two serial ports, meet by two strings Mouth carries out data transmission.

Embodiment of the present utility model is the foregoing is only, scope of patent protection of the present utility model is not thereby limited, The equivalent structure transformation that every utilization the utility model specification and accompanying drawing content are made, or directly or indirectly it is used in other phases The technical field of pass, is similarly included in scope of patent protection of the present utility model.

Claims

1. a kind of control system of all-in-one machine for multimedia teaching, it is characterised in that including VGA switching control modules, the VGA cuts Change control module and select a data selector and the including the first USB interface, the second USB interface, latch, video switch, double four Three USB interfaces；

The RED ends of first USB interface connect the 3B1 ends of video switch, and the Green ends connection of first USB interface is regarded The 2B1 ends of frequency switch, the Blue ends of first USB interface connect the 1B1 ends of video switch, the row of first USB interface The end of a data selector 212, the field synchronization VSYNC ends connection double four of first USB interface are selected in synchronous HSYNC ends connection double four Select the end of a data selector 112, the digitally SCND ends of first USB interface, red ground RGND ends, greenery patches GGND ends, Lan Di BGND ends and ground connection GND ends ground connection；

The RED ends of second USB interface connect the 3B1 ends of video switch, and the Green ends connection of second USB interface is regarded The 2B1 ends of frequency switch, the Blue ends of second USB interface connect the 1B1 ends of video switch, the row of second USB interface The end of a data selector 212, the field synchronization VSYNC ends connection double four of second USB interface are selected in synchronous HSYNC ends connection double four Select the end of a data selector 112, the digitally SCND ends of second USB interface, red ground RGND ends, greenery patches GGND ends, Lan Di BGND ends and ground connection GND ends ground connection；

Described double four select the S0 ends of a data selector to connect latch 1D ends, and described double four select the S1 ends of a data selector to connect The 2D ends of latch are connect, described double four select a data selector 2Y ends to connect the row synchronization HSYNC ends of the 3rd USB interface, described The field synchronization VSYNC ends of double four the 3rd USB interfaces of 1Y ends connection for selecting a data selector；

The 1Q ends of the latch connect the S1 ends of video switch, and the 2Q ends of the latch connect the S2 ends of video switch；

The A1 ends of the video switch connect the BLUE ends of the 3rd USB interface, and the 2A ends of the video switch connect the 3rd VGA and connect The GREEN ends of mouth, the 3A ends of the video switch connect the RED ends of the 3rd USB interface.

2. the control system of all-in-one machine for multimedia teaching according to claim 1, it is characterised in that also including sound control mould Block, the voice control module includes the first COBBAIF, the second COBBAIF, audio effect processing chip, the 3rd COBBAIF, sound Amount control chip, operational amplifier and two-channel power amplifier chips；The L channel output LINT end connections of first COBBAIF The LIN1 ends of audio effect processing chip, the R channel output end RINT ends connection audio effect processing chip of first COBBAIF RIN1 ends；The L channel LINT ends of second COBBAIF connect the LIN2 ends of audio effect processing chip, and second audio connects The R channel RINT ends of mouth connect the RIN2 ends of audio effect processing chip；The LFOUT ends concatenation operation of the audio effect processing chip is put The first input end of big device, the second input of the RFOUT ends concatenation operation amplifier of the audio effect processing chip, the computing First output end of amplifier connects the IN1 ends of two-channel power amplifier chips, and the second output end connection of the operational amplifier is double The IN2 ends of sound channel power amplifier chips；The L channel output end of the 3rd COBBAIF connects the IN1 ends of volume control chip, institute The R channel output end for stating the 3rd COBBAIF connects the IN2 ends of volume control chip, the VOUT1 ends of the volume control chip The first input end of concatenation operation amplifier, the second input of the VOUT2 ends concatenation operation amplifier of the volume control chip End.

3. the control system of all-in-one machine for multimedia teaching according to claim 2, it is characterised in that also including by key control mould Block, the key control module includes that a VGA switch keys, the 2nd VGA switch keys, the first volume adjusting key, the second volume are adjusted Section key, the 3rd volume adjusting key and the 4th volume adjusting key；A data selector is selected in the first VGA switch keys connection double four The S1 ends of a data selector are selected in S0 ends, the 2nd VGA switch keys connection double four, and first volume adjusting is bonded and connects audio The DATA ends of process chip, second volume adjusting is bonded the CLK ends for connecing audio effect processing chip, the 3rd volume adjusting key The DATA ends of volume control chip are connected, the 4th volume adjusting is bonded the CLK ends for connecing volume control chip.

4. the control system of all-in-one machine for multimedia teaching according to claim 2, it is characterised in that also including power supply voltage stabilizing mould Block, the power regulator module includes voltage-stablizer LM2574, voltage-stablizer LM7809 and voltage-stablizer 1117-3.3；The voltage-stablizer The VIN ends external power supply of LM2574, bridging coil L1, the voltage stabilizing between the OUTPUT ends and FB ends of the voltage-stablizer LM2574 The POWER/GND ends of device LM2574, ON/OFF ends and SIG GND ends ground connection, the FB ends connection double four of the voltage-stablizer LM2574 Select a data selector；The IN ends of the voltage-stablizer 1117-3.3 connect the FB ends of voltage-stablizer LM2574, the voltage-stablizer 1117- The power end of the power end, the power end of video switch and volume control chip of 3.3 OUT terminal connection latch；The voltage stabilizing The IN ends connection external power supply of device LM7809, the OUT terminal of the voltage-stablizer LM7809 is by resistance R54 concatenation operation amplifiers First input end, the OUT terminal of the voltage-stablizer LM7809 passes through the second input of resistance R59 concatenation operation amplifiers, described The OUT terminal of voltage-stablizer LM7809 connects the power end of audio effect processing chip.

5. the control system of all-in-one machine for multimedia teaching according to claim 1, it is characterised in that also including one turn two of serial ports Module, one turn of two module of the serial ports includes first serial, second serial and the 3rd serial ports, and the RXD ends of the first serial connect Connect the RXD ends of second serial and the RXD ends of the 3rd serial ports, the TXD ends of the TXD ends connection second serial of the first serial and the The TXD ends of three serial ports.