SU1157557A1 - Device for displaying teaching-aid information - Google Patents

Abstract

DEVICE FOR. TRAINING INFORMATION DISPLAYS containing sequentially connected synchronization block, counter block, memory block, image generator and indicator, second and third imager chips are connected respectively to the second output of the block of counters and the first output of the synchronization block, connected to the second memory block input, different By the fact that, in order to increase the accuracy of the display, a shaper of codes, a generator of single pulses and a distributor w pulses are entered into it, the first input of which is connected with the second output of the synchronization unit, the second input and the first output with the third output and the second input of the counter block, respectively, the second output with the third inputs of the counter block and the memory block, the third output with the first input of the driver, the second input of which is connected to the first output synchronization unit, the output is with the fourth input of the memory unit, and the third input is the information input of the device (Properties, the first input of the generator of single pulses is the synchronization input of the device, the second input is connected to the second the output of the counter block, and the video output is the synchronization output of the device and is connected to a quarter input of the counter block. O1 P1 W

Description

The invention relates to teaching aids, in particular to training systems, and can be used to display to a student slow-moving processes.

A device for displaying information on the screen of a cathode ray tube is known, comprising a control unit connected to a buffer memory unit, two registers, two voltage code converters, the outputs of which are connected to the deflection system of the cathode ray tube, and the inputs to the corresponding registers, the control inputs of which are connected to the control unit, and the informational ones to the buffer memory block .flj.

The disadvantages of this device are the impossibility of demonstrating and displaying slowly varying processes and the complexity of the design.

The closest to the invention is a device for displaying educational information; and comprising a generator, a synchronization unit and a series-connected counter block, a memory block and a imaging unit of the scientific research institute for controlling the presentation of educational information on the indicator, the second input of which is connected to the second output of the counter block j sequentially connected first trigger and an AND-OR element, the second input of which is connected to the generator output, the first and second outputs, respectively, to the second input of the memory unit and the first input The meter block and the third input of the memory block, as well as the second trigger connected in series, element I and the counter, whose output is connected to the first input of the second trigger, the second input of which is connected to the third output of the counter block, the first output to the third inputs of the meter block and block predstav1 educational information, and the second output - with the fourth input of the counter block and the third input of the element AND-OR, the first and second inputs of the first trigger are connected to the third and fourth outputs of the counter block, respectively, the second The input of the element I is connected to the output of the generator, the fourth input of the memory block is the input of the device 2,

The disadvantages of the known device are low reliability due to the low efficiency of using the training information presentation unit, low accuracy of displaying plots of the process under study due to analog signal conversion and device complexity.

The purpose of the invention is to improve the display accuracy.

The goal is achieved by the fact that the device for displaying educational information, comprising a sequentially connected synchronization unit, a counter unit, a memory unit, an imaging unit, and an indicator, the second and third inputs of the imaging unit are connected respectively to the second output of the counter unit and the first output of the synchronization unit connected to the second input of the memory block, a shaper code generator, a single pulse generator and a pulse distributor are entered, the first input of which is connected to the second output The synchronization block, the second input and the first output With the third output and the second input of the counter block, respectively, the second output with the third inputs of the counter block and the memory block, the third output with the first input of the driver, the second input of which is connected to the first output the synchronization unit, the output is with the fourth input of the memory unit, and the third input is the information input of the device, the first input of the generator of single pulses is the synchronization input of the device, the second input is connected to the second output of the counter unit And the output is the output of the synchronization and is connected to a fourth input of the block counter.

FIG. 1 shows the structure of the proposed device; in fig. 2functional diagram of the device.

A device for displaying training information (Fig. 1) contains a synchronization unit 1, the outputs of which are connected to the corresponding inputs of the form factor 2, which serves to pair the input information, the recording synchronization unit 3, the counters block 4, memory block 5 , a driver of 6 luminance signal connected by an output to one input j 3 of a driver 7 of a television signal, the other inputs of which are connected respectively to the output of the synchronization unit 8, frame reverse and the output of block 4, the outputs of the latter are also connected to The corresponding inputs of block 5, generator 6, block 8 and block 3, and the inputs are connected to the outputs of block 8, block 3 and the generator 9 single pulses, the output of which is the output of the external synchronization of the device, one input of the generator 9 is the input of the external synchronization of the device and can be connected, for example, to the Start button 10, and the other input is connected to the output of the 4-meter block. The output of block 9 is connected to one input of the imager 6, its other input is connected to the output of memory block 5, the inputs of which are connected to the output of block 3 and the former 2, the input of the latter is connected to the output of block 3, whose inputs are connected to a frequency divider 11 and a switch 12 sweep times The inputs of the imaging unit 2 are the inputs of the device, and one input can be connected, for example, to the button 13 Erase -. Block 4 contains write counters 14, sweep counters 15 and switch 16. Block 1 contains (Fig. 2) serially connected master oscillator 17 and counter 18. Shaper 2 contains sequentially connected shift register 19, buffer register 20, element. OR 21 and analog-to-code converter 22. Block 3 contains, for example, elements 23-25 I. Counters 14 contain, for example, three summation nodes connected in series 26, and counters 15 in series three summing connectors 27. Switch 16 contains, for example, three AND-IL 28 elements. Shaper 6 contains a comparison node 2, a buffer register 30, a shift register 31, and AND 32 element. Shaper 7 contains successively connected high-frequency generator 33 and modulator 34. Block 8 contains the trigger 35, element 36 of the differential circuit 37. The information is displayed on the indicator 38. The drivers 6 and 7 and the block 8 are combined into the imaging unit 3 74 1 images, and the block 3, the divider 11 and the switch 12 - into the pulse distributor 40. The device works as follows. The information of a single amplitude point of the displayed curve, for example, in the form of an eight-bit word, is recorded in block 5 during the reverse sweep, for example, every 32nd line or with a pass of 1,2, ..., n reverse line moves. During the forward sweep of the frame, all points of the curve that were previously recorded in block 5 are read. To display the information, an industrial television receiver is used as the generator 38. To simplify the synchronization of the operation of the device and the TV, a common scanning method is used. The number of lines in a frame is advisable to choose a multiple of the number of binary calculus, for example 512. With this, a single 4096-bit integrated circuit is enough to display the physical process diagram. The pulses from the master oscillator 17 with a frequency of, for example, 256 fc (Cc is the horizontal scanning frequency) are fed to the counter 18, for example, with a conversion module. From the counter 18 pulses with a follow-up frequency, for example, 8 f go to cascades 27, for example, each with a recalculation module. Cascades 27 operate during forward and reverse frame strokes. During the forward stroke, the counters 15 recalculate the full cycle, for example (16x16x16), during the reverse stroke they recalculate, for example, to 356 (16x16) and nullify. During the forward stroke of the rows, the codes of cascades 2 are connected to the address buses of block 5. The outputs of the cascades 27 are connected to the address buses by elements 28, which are controlled by AND 23. During the reverse stroke, for example, every 32 nd, 96th, etc. The outputs of the cascades 26 are connected to the address buses of block 5. At each reverse course of the line, an eight-bit word is written (one point of the plot), which determines the division dividing factor d 11. 11. The element 23 of block 3 receives pulses The frequency of the following is sled. - 3Z with. L-g- (where the line length is 64 µs) and the enabling pulses from divider 11. Generator 9 is necessary to synchronize the start of the frame sweep and the start of the plot of the displayed physical process. The generator 9 can be started by pressing button 10. Next, cascades 26 are synchronized with the beginning of the reverse sweep of the frame and a synchronization pulse is emitted to external devices. If necessary, the generator 9 can be started from an external device. After recalculating the full cycle: cascades 27 along the falling edge of, for example, the 4096th pulse, trigger 35 switches (end of the forward stroke of the frame), the positive potential from its inverse output opens And 36 to pass the pulse generated by the differential circuit 37 along the falling edge, for example , Of the 256th pulse, taken from the second stage 27. This impulse sets the stages 27 to the zero state, trigger 35 to the one state. In this way, a reverse sweep is formed, which is equal in duration to 256 pulses, followed by a frequency of 8 fc. Cascades 27 operate a full cycle at the time of a forward frame run, then a second time is missed up to 256 and zeroed, forming a reverse frame run. Cascades 26 work; in a step mode, i.e. for example, eight pulses are counted during the return stroke of each, for example, the 32nd, 64th, 96th .... lines. Moreover, the recalculation is carried out during the reverse frame. This is necessary for the uninterrupted recording of a plot of the physical process. Thus, after one word, the cascades 26 retain their state until the next, for example, the 32nd reverse stroke or the state of the cascades, for example, until the 64th, 96th, ... reverse stroke, depending on from the division factor of divider 11, which is set by switch 12. And element 24 receives pulses, for example, with a frequency of .rf fc and a duration equal to the inverse 76 line of the line 8 Tj, (pulses, for example, with a frequency of 64f, and the resolving impulse from the divider 11). Thus, a burst of pulses is formed (for example, eight each) at the cascades 26. At the same time, the bursts of eight pulses go to block 5 to synchronize the recording mode and shift the information in register 19. At the end of the recording of information from the last to block 5, the register 19, a new information is recorded from the register 20, the write synchronization pulse comes from the AND 23 element. The information in the register 20 can be received both in a variable sequential code and in analog form. Conversion of analog information is carried out by converter 22. For synchronization of the latter, from it counter 18 and the first stage 27 are connected, for example, eight bit buses. Since the counter 18 receives pulses that follow at a frequency of, for example, 256 ft, the analog information can be converted to 256 discrete values. Thus, the device resolution per line is 256 points. If it is necessary to increase the resolution, it is necessary to increase the size of the information word and the corresponding nodes of the electronic circuit. During reading, information from block 5 enters register 31. Shift synchronization pulses come from AND 32, which opens during the forward stroke of a frame with positive pulses from trigger 35. After register 31 is filled, for example, with an eight-bit word (amplitude information a single point of the displayed curve), a parallel pulse is rewritten into a register 30 by a sync pulse, which follows the frequency of the rows fc from the first counter. The outputs of register 30 are connected to the inputs of the coincidence circuit 29, the inputs of which are connected to the outputs of counter 18 (bits 1,2,4,8,16 and 32) and counter 27 (bits 1 and 2) .- These counters for the duration of one the lines recalculate, for example, 256 pulses of block 1. Therefore, when COB-I 7 I falls, the code in register 30 and the status code of counters 18 and 27 from circuit 29. A pulse with a duration of 1: 256 is the length of the line corresponding to the luminous signal (Y ) the mapping process. Thus, on each television line one point of the signal plot is displayed. In this case, the signal amplitude is proportional to the time delay of the pulse Y relative to the synchronization pulse of the lines. The delay time is represented, for example, by an eight-bit code, while the amplitude may have, for example, 236 discrete values. Since the regeneration of a television image must not be lower than 50 Hz, if you record one point of the plot at the reverse of each, for example, the 32nd line, the time of the process recorded on the screen is 20 ms -tg 602 ms (17 is the number of dots recorded for one KSKP 17; 20 ms sweep time of one frame Jo rij 20 ms). If, during the recording of information, to skip 1,2, ..., n write pulses, then a process with a duration of 602 ms X 1, 602 ms X 2, ..., 602 ms X n can be recorded. Thus, the proposed training device allows display processes on the big screen to a group of students with unlimited discrete sweep time. . The sweep resolution is 0.602 s. If you need a smooth change in the frequency of the sweep, you can change the generator frequency of the 1 Co block of the circuit 29 information in the form of pulses delayed relative to 7 line synchronization pulses is fed to the modulator 34. At the same time, the line synchronization frequency fc comes from the first stage 27, the synchronization frequency frames to the trigger 35 and the high frequency from the generator 33. High-frequency generator 33 operates at a frequency of, for example, a fifth television channel. Thus, the device forms a complete television signal, which is fed to the antenna input of the indicator 38. If you need to display several plots on one screen, you need to supplement the device with shapers 2 and 6, and with block 5 (the number of blocks corresponds to the number of displayed curves). The displacement of the axes of the diagrams displayed on the screen is possible before the switching of the bit buses of the registers 30 connected to the circuit 29. The proposed device possesses a higher reliability compared to the known television receiver that presents the training information with an industrial television receiver. Using the comparison of codes when displaying plots of the studied process, it is possible to eliminate errors introduced by the analog converter. At the same time, the accuracy will increase by 2 - 3 times with respect to the analog method. The design of the proposed device is greatly simplified by eliminating the tax-code converter after the memory block and counting the reverse flow of the sludge voltage.

Insrormacir U -.- I W / Erasing

Claims (1)

DEVICE FOR. DISPLAYS OF EDUCATIONAL INFORMATION, which contains sequentially connected synchronization block, counter block, memory block, imager and indicator, second and third inputs of the imager are connected respectively to the second output of the counter block and the first output of the synchronization block connected to the second input of the memory block, different in order to increase the accuracy of the display, a code generator, a single pulse generator and a pulse distributor are introduced into it, the first input of which is connected to the second output and the second input of the counter unit, respectively, the second output with the third inputs of the counter unit and the memory unit, the third output with the first input of the code generator, the second input of which is connected to the first output of the synchronization unit , the output is with the fourth input of the memory block, and the third input is the information input of the device, the first input of the single pulse generator is the synchronization input of the device, the second input is connected to the second output of the block counters, - and the output is the synchronization output of the device and is connected to the fourth input of the counter block. 1 157557