CN86210431U - Multifunctional audio-visual teaching system with computer - Google Patents

Abstract

The utility model relates to an audio-visual teaching system for a computer network, which has the bidirectional transmission of video frequency, audio frequency and programs. Under the control of a main control box, the utility model can realize the transmission of the video frequency, the audio frequency and the programs of a host computer to a branch computer and can also realize the mutual transmission of the video frequency, the audio frequency and the programs between the individual branch computer and the host computer under the condition of the quiz and competing state of the computer. The system can carry out the language teaching of the methods of calculation, real computer practice for students, the phonetic teaching of foreign languages, television teaching, the audio-visual teaching of other subjects, scientific calculation, television watching, play rooms, etc. The utility model has the advantages of multiple functions, simple structure and low cost, and is particularly suitable for the popularization and the spread of the audio-visual teaching.

Description

Multifunctional audio-visual teaching system with computer

The present invention belongs to the computer network Education Literature System.

General computer network system has only the function of video one-way transmission, closed-circuit television for example, closed circuit computer teaching system.The characteristics of this type systematic are to realize remote data communication, and resource sharing can the oneself be imparted knowledge to students office automation etc.But this class network system has only half-duplex channel, can not carry out information feedback between main frame and the extension set, then can not carry out computing machine between the Faculty and Students and answer questions, discuss in teaching.Simultaneously, this class network system need be developed a large amount of service softwares reliably and be used for showing teaching purposes such as explanation, and its tempo of development is just slower.And connect the construction more complicated of the high speed assembly and the hardware interface of many extension sets, build up a cover system cost height like this, expensive price.This particularly popularizes computer literacy and is difficult to accomplish for universal education for computer in the teenager of middle and primary schools.

Purpose of the present invention is to provide a kind of simple in structure, low price, be easy to popularize and promote computer teaching, have video, audio frequency and program duplex channel, can carry out information interchange and feedback between main frame and the extension set, be mainly used in the computer network system of teaching.

The utility model is divided into input control section, output control part and distribution control section.There is the software of computer, black and white television set, power supply box, projector, stabilized voltage supply, magnetic tape station, the various support teaching of typewriter in this system, it is characterized in that having video, audio frequency and program duplex channel and connect the bus and the interface of many extension sets, the input and output that can control video, audio frequency and program, can provide multiple remote signal, the main control box that signal is amplified, distributes.Relay is housed, light emitting diode, resistance, button and various change-over switch, the video amplifier, original papers such as interface in main control box.Simultaneously, this system has and matches with main control box, distributes extension set control box that control information flows to and bus, interface.Relay, diode, light emitting diode are housed in the extension set control box, race to be the first to answer a question key, interface etc.The extension set control box matches with main control box, forms and races to be the first to answer a question, puts question to, and the computer matrix network of video, audio frequency, program duplex channel is realized networking and interlocking.The utility model as bus and interface, connects many extension sets with common microphone cord, power lead, single core plastics flexible cord.Simple in structure like this, low cost.

The main frame of multi-purpose computer Education Literature System and extension set all are made up of computer and black and white television set, and black and white television set is made display and used.When adopting stronger computer of Chinese word function and green display, be mainly used in the teaching of tele-board.Main frame is not limit machine, only need select for use to have the strong microcomputer of Chinese word function, for example apple ∏ type machine etc. all can, extension set also can be selected different machines.This network system all is suitable for any micro computer.

The magnetic tape station of multi-purpose computer Education Literature System is transferred to all extension sets and main frame to program by main control box, and can under state is raced to be the first to answer a question in enquirement the extension set program be transferred in the magnetic tape station.The audio frequency bidirectional passage is to receive sound amplifier by microphone, and the loudspeaker in the televisor of main control box, extension set control box and extension set are realized.D.C. regulated power supply is an output 12V direct current, the usefulness of the video amplifier in supply main control box and the extension set control box, relay, light emitting diode etc.The multi-purpose computer Education Literature System is to the transmitted in both directions of video, audio frequency, program, be to control by main control box, can realize the transmission of the video, audio frequency, program of main frame, also can be implemented in computing machine in the mutual transmission of puing question to, racing to be the first to answer a question indivedual extension sets under the state and the video between the main frame, audio frequency, program to each extension set.Do not influence main control box at this time to the video of other each extension set, audio frequency, state or the original state that has of each extension set oneself when program is transmitted.

Can carry out the classroom instruction of algorithmic language in system, also can do the student and go up the machine practice, also can carry out the phonetic teaching of foreign language; Television teaching, the electronic teaching of other subject; Science is calculated, and televiews, and game room etc. are a kind of multi-functional computer network systems.

Below in conjunction with drawings and Examples the utility model is further specified and describes.

Fig. 1 is a multi-purpose computer Education Literature System block diagram.

Fig. 2 is main control circuit figure.

Fig. 3 is teacher's table circuit controling drawing.

Fig. 4 is extension set control circuit figure.

In the accompanying drawing 2: K ₄Be single-pole double-throw switch (SPDT), can export with the supervision of loopback and select that (2) are MEB computer input channel, (3) are picture recording input channel, current limliting dropping resistor R ₁Be 680 Ω, fixed resistance R ₂Be 75 Ω, variable resistor R ₃The power that changes input signal is 470 Ω, and in the accompanying drawing 3: the withstand voltage 25V of capacitor C, capacity 20 μ F guarantee that relay contact well contacts resistance R ₄Resistance value 680 Ω; Unidirectional conducting diode resistance D ₂Be 2CK, K switch ₇, interlock keyswitch K _NKm is in the accompanying drawing 4: diode D ₃Be 2cp; Current limliting dropping resistor R ₇, resistance value is 680 Ω; Resistance R ₃, resistance value 75 Ω and resistance R ₆, resistance value 100 Ω play matching effect; Extension set computer (8) adopts pc8300 or other computer; The loudspeaker of black and white television set (9); Microphone plug (10); Headset plug (11); 01,02,03,04,05 is not shared ground wire; BK, EK race to be the first to answer a question power channel; Bj, Rj race to be the first to answer a question any pair of channels in the enquirement.

Accompanying drawing 1, native system comprises: computer and display.Main control box is controlled on the table for being placed on the teacher separately, and also is furnished with video recorder on the control table, the MEB-pc main frame, and AC voltage regulator, direct current stabilizer, magnetic tape station is received sound amplifier.Extension set comprises: computer and display.The extension set control box separately and be placed on student's table.The quantity of native system extension set is not limit.It is Pc8300 computer and 14 inch black and white television sets (6) that the total system of present embodiment is furnished with main frame, and extension set is 33 pc8300 computers and 33 14 inch black and white television sets (7), connects the bus and the interface of main control box and extension set control box in addition.

Accompanying drawing 2: import by (1) passage when the information of main frame, stir double-point double-throw switch K ₁, press key switch K ₃, bright corresponding to the pilot lamp F of pc8300 main frame, TV is by unidirectional conducting diode D ₁Be 2CZ and the connection of O line, the relay J of all extension sets ₂Adhesive, light emitting diode F ₂Shinny, then the video transmission passage is normal.The information of main frame is through the video amplifier (4), by T ₃Passage, interface, bus are transferred to the school, make on the display (7) of student's extension set and obtain corresponding information; Perhaps work as the information of indivedual extension sets through T ₁When passing to main control box, again through change-over switch K ₂, the video amplifier (5), T ₂Form the mutual channel of two-way video, audio frequency, program with main frame.The teacher puts question to, and can carry out the corresponding of vision signal by main control box and extension set and exchange.No matter be under the situation of machine on all video transmissions and the school oneself, can not influence the operate as normal of other extension set.If the teacher thinks that this student's problem is fine, can be by main control box, through key switch K ₃, the video amplifier (4) and T ₃Passage is given to the school to the information of this extension set.

Accompanying drawing 3: serve as a teacher when puing question to a certain student, racing to be the first to answer a question enquirement switch K ₄K ₅Push the enquirement state, press the interlock of the corresponding student number of this student and put question to keyswitch K ₈K ₉, make relay J C ₁And JR ₁Adhesive, then E ₁And B ₁Line is switched on charged, and simultaneously, other extension set is finished interlocking.Teacher's table control lamp F ₃And pilot lamp F is raced to be the first to answer a question in the enquirement of corresponding student's table ₁Bright.Simultaneously, this student's screen is by T ₁Passage is through change-over switch K ₂And K switch ₄, be transferred on the screen (6) of teacher's main frame, just can carry out the various information interchanges of computing machine between the teachers and students.Put question to and finish to press reset key K ₆

Accompanying drawing 4: serve as a teacher the control table and put question to switch K racing to be the first to answer a question ₄K ₅, push when racing to be the first to answer a question state, a certain student at first by interlock race to be the first to answer a question keyswitch K ₁₀, K ₁₁, condenser J then ₁With relay J C corresponding in teacher's table main control box ₁And JR ₁Adhesive, this extension set pilot lamp F ₁With the pilot lamp F on the corresponding main control box ₃Bright, relay J C ₁～JCN, JR ₁Matrixing network self-locking or the interlocking of～JRM, other students race to be the first to answer a question button K ₈～KM is inoperative.Under the state of racing to be the first to answer a question, can be between the teachers and students by T ₁, T ₂S ₂, S ₁P ₁, P ₂The functions such as transmitted in both directions of the video of passage realization computing machine, audio frequency, program.

If when the teacher will assign the student to teaching program and games, only need pass through P ₃Passage is squeezed into the LOAD order, then by earphone passage (11), is transferred to Student computer.Serve as a teacher carried out one section teaching after, but stopcock K ₁, relay J ₁, J ₂, action returns to not "on" position, and the student just can oneself go up the machine practice.

Claims (6)

1, a kind of multi-purpose computer Education Literature System of forming by the software of computer, black and white television set, video recorder, power supply box, projector, stabilized voltage supply, magnetic tape station, the various support teaching of typewriter, it is characterized in that this system has video, audio frequency and program duplex channel, main control box and extension set control box, and the bus and the interface that connect many extension sets.

2, multi-purpose computer Education Literature System according to claim 1, it is characterized in that above-mentioned duplex channel is can control input and output to video, audio frequency and program by having, multiple remote signal is provided, the extension set control box that signal amplifies the main control box of distribution and the distribution control signal that matches with main control box flows to is formed.

3, multi-purpose computer Education Literature System according to claim 1 and 2, it is characterized in that above-mentioned extension set control box and main control box match, form race to be the first to answer a question, the computer matrix network of enquirement, video, audio frequency, program duplex channel, realize networking and interlocking, promptly the transmission of the video, audio frequency, program of main frame be can realize, the enquirement of computing machine, the mutual transmission of racing to be the first to answer a question each indivedual extension set under the state and the video between the main frame, audio frequency, program also can be realized each extension set by main control box control.

4,, it is characterized in that the bus of many extension sets of above-mentioned connection and interface are to form bus and interface with common microphone cord, power lead, single core plastics flexible cord and the general key that patches according to claim 1,2 described multi-purpose computer Education Literature Systems.

5, multi-purpose computer Education Literature System according to claim 3 is characterized in that the bus of many extension sets of above-mentioned connection and interface are to form bus and interface with common microphone cord, power lead, single core plastics flexible cord and the general key that patches.

6, multi-purpose computer Education Literature System according to claim 3, it is characterized in that above-mentioned native system main frame and extension set can be with any types, the quantity of extension set is not limit, and can carry out the classroom instruction of algorithmic language, also can do the student and go up the machine practice, also can carry out the phonetic teaching of foreign language; Television teaching; The electronic teaching of other subject; Science is calculated, and televiews; The chamber etc. of playing games.

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