SU1425758A1 - Audiovisual teaching apparatus - Google Patents

Abstract

The invention relates to automation and computer technology, in particular, to technical training aids, and can be used in text display devices for displaying educational information. The aim of the invention is to expand the didactic possibilities and simplify the device by reducing the cost, increasing the reliability and multipurpose use of household television and magnetorecording Q and 4 CE, SP, P1 O1

Description

instrumentation. The audiovisual training device includes a remote control 1, a generator of 36 clock pulses, switches 10, 17, a TV 5, an image converter 34, a counter 30, a block 28, a visual information input, a comparator 27, a pulse selector 25, triggers 2,3,12, elements AND 6,7,9,21,22, - elements OR 8, 19, 24, inverter 23, frequency divider 20, key 16, driver 11 pulses, selectors 14, 15, mixer 26, blocks 4, 13 of the RAM, t il.

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I The invention relates to automation and computing, in particular to technical training tools, I and MO / KET to be used in devices for displaying educational information I textual in nature. I The purpose of the invention is to expand the didactic possibilities and; device simplification.

 iia the drawing shows the flowcharts: -the proposed audiovisual training device.

: The device contains a remote control 1 control I laziness, triggers 2, and 3, block 4 operative memory, TV 5, elements N1 6 and 7, elemengg shSh 8, element 9, i switch 10, driver AND im- 1 pulses, trigger 12, block i3, memory I select, selectors 14 and 15, i 16, switch 17, generator 1B. element OR 19, frequency divider 20, elements I 21 and 22, inverter 23, element OR 24, selector 25 splices, mixer 26, comparator 27, visual information input unit 28, input 29 counter 30, threshold element 31., inputs 32 and 33, an image converter 34, a control pulse generation unit 35, a clock pulse generator 36, a unit, 37 presentation of training information, a mode setting task unit 38.

The device works as follows.

When turned on, the triggers 2,3 and 12 are set to the zero state. In order to record the image on the tape recorder of block 4, the user — the student — presses the Record button on the console, as a result of which, from its output, the And 6 element receives a high signal

ABOUT

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go level At the other input of element 6 from the output of selector 25, a frame synchronizing pulse comes from the full telemionic signal coming from the output of block 28. As a result, the output of element 6 forms a high level signal that sets trigger 3 to the state of logical one, which is fed to the input of block 4, including it and the recording mode. In addition, the signal of the logical unit, passing through the element OR 8, initiates the formation of a pulse at the output of the imaging unit 11, while the trigger 12 is then set to one. A high level signal, at the same time as the trigger trigger 12, is applied to the input of block 13, giving it a mode. Recording information received in the form of a binary code at its input from the output of the selector 15. The binary code is generated by the comparator 27 from the incoming to its input from the output of the television signal (video) block 28 by comparing its level with the threshold input 29, a logical unit is formed at the input of the comparator 27 when the video signal level is higher than the threshold (corresponds to the white TV image element), and nao Orot - logical zero in the case where the above condition does not hold (TV picture element corresponds to black). The signal then enters the input of the selector 15 through an AND 21 element, which is opened by a pulse transmitted from the generator's code to the clock.

18 through switch 17, element OR

19 and an open element AND 22. The address of the element to be recorded in block 13 information is fed to the block on the block 13

from the output of counter 30, which is ten

the frame sync pulse delivered to its input from the output of the selector 25 through the open key 16 is zeroed out. Counter 30 accumulates the clock pulses coming from the output of the And 22 element through the selector 14. Continuous or frame damping pulses that appear in the television signal , are selected by the selector 25 and fed to the corresponding input of the SHSh 24 element, and then through the inverter 23 to the input of the AND element 22, closing it. Thus, it breaks down from writing the code in block 13 for a time 15 equal to the duration of the pulses mentioned.

When all the frame information is recorded in block 3 in the manner described, the counter 30 will generate an overflow signal which, when it enters the trigger 12, transfers it to the logical zero state. The zero signal generated at the same time at the input of block 13 transfers the latter to the information reading mode, which from the output of block 13 through the switch 10 enters the input of block 4. The encoded image signal of the image is recorded on the magnetic tape of block 4. Logical unit On the inbers output of the trigger 12, passing through the element 7, opened by the signal from the output of the trigger 3, switches the switch 17, causing the clock pulses from the output of the generator 18 through the switch 17 to enter the divider 20 and then in one element OR 19.

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In the write mode, clock pulse-.dd is fed to the input of block 13 through

These are fed to the input of the counter 30 at a lower frequency as compared to the mode of recording information in block 13. This achieves the agreement of the rate of reading of information specified by the time characteristics of block 28 with the speed of recording of block 4.

On the day of stopping the recording of information, the user presses the Stop button on the remote control 1, as a result of which a high level logic signal is generated at its output, which goes to the inputs of the flip-flops 2 and 3 and sets them to the logic zero state, as well as to the shut-off input of the unit 4 and TV 5.

To play the recorded information, the user - the learner - with the help of the corresponding button on

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the selector 15 and the output of the threshold element 31. The code value is equal to the logical unit if the input signal level of the threshold element 31 is higher. level of the second threshold, and vice versa. The first and second threshold levels are set externally at inputs 32 and 33 of the device.

After all frame information has been recorded in block 13 of the magnetic tape of block 4, counter 30 will generate a replenishment signal at its output, which triggers a logical zero at the output of trigger 12, which in turn the input of block 13, puts it into read mode, and also being fed to the input of element 9, closes it. This again reveals

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the remote control unit 1 generates a signal at its output, which, arriving at the input of the trigger 2, sets it in the unit state. The logical unit from the trigger output 2 is fed to the playback control input of the block 4 .. to the power on input of the TV 5, as well as to the input of the element OR 8, as a result of which a high level signal is set at the output of the trigger 12, similar to the previous relaxation signal unit), transferring ua1-sh block 13 to the recording mode and, moreover, to the input of the switch T-0, as a result of which the input of the block 13 switches to the input of the switch 10. In addition, the signal from the output of the trigger 2 passes through the element And 9, open with a logical signal unit from the output of the trigger 12, is fed to the input of the key 16, closing it, and the inputs of the selectors 4 and 5, which at the same time switch their outputs to the inputs that receive signals from the outputs of the threshold element 31, to the input of which from the output of block 4 The image code recorded on the tape in recording mode is received. The threshold element 31 compares the level of the input pulses with two thresholds. If the input signal. the first threshold (lower) level, then at one output of the threshold element 31 a clock pulse is formed, which passes through the selector 14, enters the input of the counter 30 to form the address of the information element, the two-position code of which

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go is fed to the input of block 13 through

the selector 15 and the output of the threshold element 31. The code value is equal to the logical unit if the input signal level of the threshold element 31 is higher. level of the second threshold, and vice versa. The first and second threshold levels are set externally to inputs 32 and 33 of the device.

After all frame information has been recorded in block 13 of the magnetic tape of block 4, counter 30 will generate an overflow signal at its output, which will trigger the output of the trigger 12 of the logical zero, which in turn enters the input of block 13 , puts it into read mode, and being fed to the input of the element And 9, closes it. This again reveals

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KJ004 16, and the selector 14 switches its second input to the output, to which, from the generator 18, through the switch 17, ilemeite OR I9 and the H 22 element opened if there are no damping pulses. Zummiru them, the counter 30 generates the address read from the block 13 of the information element. From the output of block 13, the image code through the switch 10 is fed to the input of the mixer 51 26, in which the application is superimposed on the code of the control dampers read out and of the block 13 and the synchronizing teleimpulses arriving at the input of the mixer 26 from the output of the mixer 26 through the converter 34, in which amplification and frequency modulation of the military television signal takes place, the last arriving at the input of the TV 5, the recorded tape is played back on the screen of the radio frame.

 After the complete unit Kfdr 13, from the output of the unit 28, the personnel synchronous pulse arrives at the input of the separator 25, which from the output of the selector 25 through the public key 16 pf leads to the input of the counter 30, reset. its content. After this this-. tfma will work according to the described crc person in accordance with the control of the Mik man1 s mi users .. p (which is studied on the remote control 1, the audiovisual training device can be used; it can also be used in an abbreviated set4: without a camera, instead of which, in this case, for example, a control etus generator can be used.In the last use case of the device, the latter can be received to automate part-time training (in this case, the user can receive recordings of the material being studied, la).

The proposed device uses standard blocks (household tape recorder, household black and white TV), which allows to achieve low cost, high reliability, ease of operation with the device .. The proposed device can be successfully used to present the material in schools , Vocational schools, colleges and universities, with auditor425758: 6

private work outside the educational institution.

The application of the proposed device allows a significant reduction in the costs associated with the purchase of textbooks and teaching materials that can be recorded on a tape of a household tape recorder (approximately 350

10 pages of typewritten text ia one MK-BO type cassette). In addition, the proposed device makes it possible to easily update the material under study, while publishing a textbook of art. 15 is established with a significant time delay (2-3 years. And also to bind the study of the material to specific learning tasks, i.e. implement problem-based learning. The device provides.

The opportunity to teach optimally, from a point of view of the level of preparation of the trainees and their specialization, to prepare a course using various materials: textbooks, technical literature, journal publications, drawings. The prepared course can be easily replicated, used both in the classroom and during independent work. Device

30 is characterized by simplicity, increased reliability and significantly lower cost, since it uses the common technique. The proposed device uses much more eco-friendly

35, a method of recording images, which makes it possible to compact an image recording on a tape recorder thousands of times, to present an image for an unlimited time and refuse to use an expensive video recorder.

Claims (1)

Invention Formula 45 Audiovisual rev. a tactile device containing a block of visual information input, a clock pulse generator, a control panel, a block providing educational information from the account, a switchboard, the first and second blocks of the operating memory, that is, In order to expand the didactic possibilities and simplify the device, it includes the commander, mixer, the first and the second electrons, the threshold element, the first, second, third, fourth and fifth elements AND, the key and the unit for setting the operation mode first, second, third and the fourth inputs of which are connected respectively to the first and second outputs of the control panel, the output of the first AND element and the overflow output. the counter, the first input - to the first input of the second element Ii and the input of the recording mode of the first RAM block, the second output - to the first input of the third element AND controlling the input of the switch, the input of the first mode of the RAM and the input of the indication of the block educational information, the third output is to the second input of the third element And the control input of the second RAM block, and the fourth input to the second input of the second element I, the output of which is connected to the input of the clock generator pulses, the output of which is connected to the first input of the fifth element I, the second input of the fifth element I is connected to the first output of the control pulse shaping unit, and the output to the first input of the fourth element I and the clock input of the first selector, whose information input is connected to the first the output of the threshold element, the input to the information input of the counter, and the control input r to the output of the third element AND connected to one key input and the control input of the second selector, the output of which is connected to the information the second input of the second memory block, the clock input to the output of the fourth element I, and the information input to the second output of the threshold element, the first and second inputs of which are the corresponding inputs of the device, and the third input connected to the output of the first memory block, the information input of which is connected to the first output of the switch, and the installation input - to the second output of the control panel connected to the installation input of the training information presentation unit, whose information input is connected to the mixer output, the first and second inputs of which are connected respectively to the second output of the switch and the output of the visual information input unit connected to the input of the control pulse generation unit and the first input of the comparator, the second input of which is the third input of the device, and the output connected to the second input From the fourth element I, the third output of the control panel is connected to the first input of the first element I, the second input of which is connected to the second output of the control pulse shaping unit connected to another key switch, the output of which is connected to the installation input of the counter, the information output of which is connected to the address input of the second operative memory block whose output is connected to the information input of the switch,