SU744666A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to computing technology and can be used in the construction of information display devices. A device for displaying information on the screen of a cathode-ray tube is known, comprising a data input unit, a memory unit and a synchronizer 1. The closest in technical essence to the present invention is a device for displaying information on the screen of a cathode ray tube containing a series-connected synchronizer, a memory unit, a first comparator unit connected to one input of the decoder, and a video signal forming unit pod.garachny to the cathode ray tube scanner on coordinates X and Y, connected to the second output of the synchronizer, the third output of which is connected to the input of the first compensation unit connected to another input of the first block Single comparing, sequentially. connected amplitude sensor, amplitude divider, second compensation unit, second comparison units connected to other inputs of the video signal conditioner and the decoder connected to the indicator. A disadvantage of the known devices is the low accuracy in displaying the pulse shape. The purpose of the invention is to improve the accuracy of the device. The goal is achieved by the fact that the device contains a signal sensor connected in series and a signal duration divider, another input of which is connected to the second synchronizer output, connected in series: a waiting generator and limit value generators connected to other inputs of the second comparison units and connected in series with a code converter and an integrator connected to the memory unit. The drawing shows the block diagram of the device. The device contains a memory block 1, blocks 2, 3 and 4 comparisons, a video mixer 5, a cathode ray tube (CRT) 6, a synchronizer 7, a scanner block 8, blocks 9 and 10 of compensation, a waiting generator 11, a generator 12 and 13 of boundary values, a divider 14 signal length, amplitude divider 15, signal duration sensor 16, amplitude sensor 17, decoder 18, indicator 19, code converter 20 and integrator 21.

The device works as follows.

In the recording mode of a single shock pulse, the signal from the output of the device is fed to the input of the memory unit 1, which is set by the synchronizer 7 to the recording mode. After the pulse has been recorded, the memory is transferred to the read mode and the information is fed to the input of the first block 2 of the avg, the second input of which is given a periodising increment signal

first block 9 compensation. When the signals at the inputs of the first comparison unit 2 are equal, the formation of a pulse on its sasiQKe ends, the duration of which is proportional to the signal value: ala, which had a long E moment at the output of memory 1. This impulse through the video, the mixer 5 is fed to the CRT 6, to which a luminous pillar is formed, which is proportional in magnitude with the angle that currently exists at the output of memory block 1. For a time equal to the duration of a frame scan, on the screen of a CRT 6 in the form of columns, the entire form of the pulse recorded in memory block 1 is displayed.

In the recording and averaging mode of multi-pulse pulses, the memory block 1 is in the information reading mode, which represents the form: mu of the previously detected shock pulse. With 3TGM from the entry of the device, the two input signals receive their average value and arrive at the input of the memory block 1, which is transferred to the recording mode and the signal is recalled. Then information is read from memory block 1 to the screen of a CRT 6, as described above. When a new shock pulse arrives at the device input, the process is repeated, in block 1 of the memory, a new Yen strike is recorded, which is then recorded on the screen of the CRT 6. 8 re-reading of information from the 6L1 of the memory to the screen of the CRT 6 simultaneously p with a shock impulse about an effective kyrtyn of the upper and lower bounds of the $ ppjvttj of the given shock impulse. This happens as follows. At the beginning of each frame, the sync pulse C ifebcofla of synchronizer 7 is fed to the input of the waiting generator 11 with an adjustable pulse width.

This impulse arrives at the control of the inputs of the generators 12 and 13 of the sawtooth voltage, at the end of the impulse the generators 12 and 13 transfer to the operating mode and start generating signals at their outputs that correspond to the upper and lower limits of one of the specified forms of the shock impulse (triangular , semi-sine, trapezoidal).

The duration of the signgips corresponding to the upper and the nearest limits of a given pulse shape is less than the time duration of one frame, moreover, their time sweep rate is synchronized by pulses received at the private inputs of the generators 12 and 13. from the divider 14 of the signal duration. The divider 14 divides the frequency of the horizontal pulses by the amount of the code dialed on the sensor 16 for the duration of the signal. Thus, the higher the code value on the sensor 16 is the signal duration, the lower the pulse frequency is set at the output of divider 14 and the slower the scanning speed of the signals and the output of the generators 12 and 13 and the longer the duration of these signals. Thus, installed on the sensor 16, the magnitude of the duration of a given pulse, you can receive at the output of the generators 12 and 13 signals, the duration of which is proportional to the value set for the duration of the signal. These signals are fed to the inputs of the second blocks 3 and 4 of the comparison. Their other inputs signal from the output of the second block of 10 compensation. This signal is in the form of treugrnlnl, with a repetition period equal to the horizontal scanning period, and the rate of increase of the signal is proportional to the frequency of the impulse that came to the input of the next compensation unit 10 from the output of the divider 15 amplitude.

Claims (2)

The amplitude divider 15 produces a division of the clock pulses into a code set on the amplitude sensor 17. At the same time, the higher the value of the code set on the amplitude sensor 17, the lower the frequency of the pulses at the output of the amplitude divider 15, the slower the rate of increase of the signal at the output of the second compensation unit 10, the later in time from the beginning of the horizontal scan, the two signals at the inputs will be compared second blocks 3 and 4 comparisons. At this time, short pulses are generated at the output of the comparison devices 3 and 4, which are fed through the video mixer B on the CRT 6 and produce a bright illumination of the screen. Thus, the process of multiplying the magnitude of the signal presently present at the generator output 12 or 13 by the code value set in the sensor 17 of the amplitude, the multiplication result is a bright point on the screen of the CRT 6, the distance from the beginning of the image along the horizontal scan is value proportional to the specified product. During the duration of one frame on the screen of a CRT 6, two lines are highlighted, which form images of pulses that coincide in shape with the upper and lower boundaries of a given pulse. The duration of these pulses is proportional to sensor code 16, the amplitude is proportional to sensor code 17 amplitude, and their beginning is separated from the frame edge by an amount proportional to the duration of the pulse of the waiting generator 11. If the measured single shock pulse in shape, duration and amplitude coincides with the sensor Kami 16 and 17, generators 12 and 13, then, by changing the duration of the pulse of the waiting generator 11, you can set on the screen of the CRT 6 an image in which the peaks of the light columns (information about the measured pulse) are inside the upper and lower gras of a given pulse. If the shape of the measured pulse and the specified one, the tops of the pillars do not exceed the boundary values of the pulse. During the duration of the code, the set pulse sequence is violated at the input of the decoder 18. The pulse from the comparison unit 4, the end of the pulse of the comparison unit 2, the pulse of the comparison unit 3. The decoder 18 is activated and the indicator 19 generates a signal that the measured and specified pulses do not match. the arrival of multiple shock pulses when it is necessary to compare the averaged form of the shock pulse with the given one; in this case, on the screen of the CRT 6, the current averaged form is observed on the screen of the CRT 6 and shock impulses and lines of its possible upper and lower bounds. When the averaged form goes beyond the boundary values, the indicator 19 lights up. The proposed device makes it possible to quickly, directly in the process of working, compare the form of the shock impulse with the specified form. by outputting the pulse shape to the recorder paper or by photographing it, then on the resulting image the boundary values of the pulse should be drawn at the required scale and only then talk about the coincidence of forms. Comparison of the average form of a shock pulse with a given one can be carried out only with the help of a computer. The application of the proposed device allows to increase the efficiency of impact tests, reduce the processing time of test results, to obtain objective information about the tests, which creates a significant economic effect and increases the reliability of the tested products. Apparatus of the Invention A device for displaying information on the screen of an optical tube containing serially connected synchronizer, memory unit, first comparison unit connected to one input of a digital converter connected to an indicator, and a video signal conditioner connected to a cathode beam receiver, scanner along X and Y coordinates connected to the second output of the synchronizer, the third output of which is connected to the input of the first compensation unit connected to another input of the first unit, last Amplitude sensor, amplitude divider, second compensation block, comparison blocks connected to other inputs of the video decoder and decoder, which are connected in series with the device to increase the accuracy of the device, it contains connected signal duration sensor and signal duration divider, another input of which is connected to the second output of the synchronizer, successively connected waiting generator and limit value generators connected to other inputs of the second blocks with equals and serially connected code converter and integrator connected to the memory unit. Sources of information taken into account in the examination 1. Testers and devices, 1974, 30, p. 35 2.Druzin Y.Ya. and other Television Information Display Systems. Energy, 1975, with. 7 (prototype).