SU930361A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to automation and computing technology and is intended to indicate on a screen a cathode ray tube (CRT) having a raster scan of various functions and processes and can be used to indicate one-time and periodic processes.

A device for indicating analog signals is known, in which input analog signals from the switch output are fed to the input of an analog-to-digital converter (ADC), the output information of which is stored in memory unit 11.

In the indication mode, the information is read from the memory registers and through a digital-to-noise converter (D / A converter) is fed to the input of the oscilloscope, where it is displayed on the CRT screen. For separate observation of the signals of the individual input channels, the control unit provides the DAC with appropriate signals that provide an indication of each input signal with a different DC component. In this case, the images of the input signals are arranged with each other.

However, this device has the disadvantage that

The input signal undergoes numerous transformations. At the same time, the accuracy of signal indication decreases.

 The closest technical solution is a device for indicating multi-channel signals, which is built on a single-channel conversion circuit. In this device, the outputs of the multi-channel data storage unit are connected to the inputs of the switch, the output of which is connected to the input of the comparator, the second input of which is connected to the output of the counter, and the output is connected to the input of the CRT, the control unit for its outputs is connected to the forward inputs of the switch and the counter, and the synchronization unit is connected to the corresponding inputs of the CRT and to the input of the control unit. In this device, the synchronization unit creates a raster scan of the image on the CRT screen, and the switch synchronously with the image scan connects the input signals to the comparator input, which converts the signal values into a time duration, highlighting the column on the CRT screen along the single beams. The combination of these columns is. It forms on the screen along one axis the images of the input signals. 2J The disadvantage of this device is that it is impossible to create several axes of the input signals on the CRT screen in order to display a long-term realization of the input signal. The purpose of the invention is to expand the field of application of the device by increasing the length of the displayed input signal. This goal is achieved due to the fact that a device for displaying information on a CRT screen contains a series-connected switch, an analog-digital converter, a memory unit, a comparator connected to the CRT modulator, a sync sync unit connected to CRT cloning systems, the first and second inputs of the first counter, the output of which is connected to another input of the comparator, with the first and second inputs of the second counter, the output of which is connected to the input of the switch, entered the program setting block, the third and fourth counters, two multiplexers and an OR element whose input is connected respectively to another output of the first counter and a synchronization unit, and the output to the first inputs of the first and second multiplexers whose second inputs are connected to the first outputs of the fourth and third counters, respectively, the third inputs with the synchronization unit, the outputs of their g, respectively, with the first inputs of the third and. the fourth counter, the second inputs of which are connected to the synchronization unit, the outputs - with the corresponding inputs of the memory block, the output of the block; The program is connected to another input of the second counter. The drawing shows a block diagram of the device. The device consists of a switch 1, analog-digital converter 2, memory block 3, comparator 4, CRT 5, second counter 6, third and fourth counters 7 and 8, first counter 9, program setting block 10, first and second multiplexers 11 and 12, blocks 13 syncro. /, element OR 14. The output of switch 1 is through an analog digital converter (ATP) 2, block 3p11, comparator 4 is connected t with a CRT modulator 5, and the output of program setting block 10 is connected via the second counter b to control input of switch 1 The output of frame pulses of the synchronization unit 13 is connected with. a CRT deflection system 5 and with the reset inputs to the third and fourth counters 7 and 8, the output of horizontal synchronization pulses .1 3 is also connected to the CRT deflection system 5 and the reset input to the first counter's zero 9. The third output of the synchronization unit 13 is connected to the clock input of the second counter 6 and through the OR element 14 is connected to the inputs} of the first and second multiplexers 11 and 12, the fourth output of the synchronization unit is connected to the control inputs of the multiplexers 11 and 12, the fifth output of the synchronization unit 13 is connected to the inputs of the start The second conditions of the second counter b, the sixth output of the synchronization unit 13 are connected to the clock input of the first counter 9 / whose output is connected to another input of the comparator 4, and the zero output is connected to another input of the OR element 14. In addition, the counter 7 has an output connected to the input the lower bits of the memory block 3, the input is connected to the output of the multiplexer 11, the maximum output is connected to another input of the multiplexer 12, and the fourth counter 8 has the output of connections to the high-order bits of the address of the memory block 3, the input is connected to the output of the multiplexer 12, the maximum output is connected to another input of the multiplexer 11. The device operates sledukitsim manner. In the recording mode, the synchronization unit 13 sends a pulse to the input of the setup of the initial conditions of the second counter b, which records at its output the channel number dialed in the program setting unit 10, alternately connects the input signals via the A / D converter 2 to the input of memory unit 3. The individual values of these signals are sequentially recorded in memory block 3. The first values of all p-input signals are recorded in memory cells, the addresses of the least significant bits of which change from zero to n-1, and the addresses of the most significant bits are equal to zero. Then, the third counter 7, via multiplexer 12, writes one unit to the fourth counter, therefore the next second values of the input p-signals are written into memory cells, the addresses of the high bits of which are equal to one, and so on. in the display mode, information is read from memory block 3 to the input of comparator 4, where it is compared with the linearly increasing signal generated by counter 9. The pulse from the output of comparator 4 illuminates part of the image line on the CRT screen by an amount proportional to the value of output of memory block 3. Scanning of images on a CRT screen in rows occurs vertically from top to bottom, and frames - horizontally from left to right. 11 Therefore, the highlighted portion of the row looks like a vertical column. During one line scan counter 9 reproduces n linear-increasing signals. When the first counter 9 is reset to zero, a pulse appears at its output, which through the OR 14 circuit and multiplexer 11 triggers the third counter 7, changing the address of the lower bits of the memory block 3. At the beginning of the second row, the unit 8 is recorded in the quarter counter and the second values of the input signals are displayed on the screen as columns. For the entire frame scan, a set of highlighted columns creates images of n-in signals on the CRT screen, located along each other. If there is a need to indicate the implementation of a signal, the number of scientific research institutes in which exceeds the number of lines of the CRT image, then in block 10 of the program, the number of the given channel is dialed. The control outputs of the multiplexers 11 and 12 are supplied from the synchronization unit 13 by a logical unit, while the memory shift clock pulses go through the multiplexer 11 to the input of the counter 7. In this case, individual values of the input signal are sequentially written into the memory cells, addresses of which change like this: zero in the lower bits, in the old bits the code changes from zero to the maximum one in the lower bits, the senior bits from zero to the maximum, and so n-1 in the lower bits, senior bits from zero to maximum. In the display mode, the clock pulses of the change in the address of the memory block 3 again receive multiplexer 11 at the input of counter 7, from whose output through multiplexer 12 to the input of counter 8. At this first line of the CRT image, the first value of the input signal is displayed on top, then the first value the second part of the signal, then the first value of the third part of the signal, etc. to the first value of n - part of the input signal. During the katz scan, the entire image of the input signal is displayed on the CRT screen, with the first part of the signal along the first upper axis, the second part of the signal along the first upper axis, and so on. . Thus, the proposed device allows displaying on the CRT screen on the n - axis the shape of any input signal, the number of values of which significantly exceeds the number of lines of the CRT image, and also display along the n - axes located one under the other, the shapes of the n - input signal. . In this case, it is easy to analyze the temporal relations between the input signals. The proposed indicator will be widely used to indicate complex multi-channel information. Such areas of application include the simultaneous indication of various spectra, shock processes at various points of products subjected to an impact, an electrocardiogram of a person at various points of his body, etc. Single-channel application of this indicator is indispensable for observing complex shock and vibration processes, complex frequency spectra, complex transients in electrical circuits. The device for displaying information on the screen of a cathode ray tube containing a series-connected switchboard, an analog-digital converter, a memory unit, a comparator connected to a CRT modulator, a synchronization unit connected to the diverting LT systems, the first and second inputs of the first counter, the output which is connected to another input of the comparator, to the first and second inputs of the second counter, the output of which is connected to the input of the switch, has the distinction that, in order to expand, the application area Devices by increasing the length of the displayed input signal, it contains a program setting block, the third and fourth counters, two multiplexers and. the OR element, the inputs of which are connected respectively to another output of the first counter and the synchronization unit, and the output to the first inputs of the first and second multiplexers, the second inputs of which are connected respectively to the first outputs of the fourth and third counters, the third inputs to the synchronization unit, their outputs respectively the first inputs of the third and fourth counters, the second inputs of which are connected with the synchronization unit, the outputs - with the corresponding. by tamping inputs of the memory block, the output of the program setting block is connected to another input of the second counter. Sources of information taken into account in the examination 1. Japan Patent 53-11172, cl. G 06 K 15/20, published. 1978. 2. Druzin J. and others. Television systems with information display, M., Energie, 1975, p. 13-16 (prototype).

Claims (1)

Claim A device for displaying information on a cathode ray tube screen, comprising a series-connected switch, an analog-to-digital converter, a memory unit, a comparator connected to a CRT modulator, a synchronization unit connected to a CRT rejective system, the first and second inputs of the first counter, the output of which is connected to another the input of the comparator, with the first and second inputs of the second counter, the output of which is connected to the input of the switch, which is different. that, in order to expand, the scope of the device for Even as the length of the indicated input signal is increased, it contains a program setting block, a third and a fourth counter, two multiplexers and an OR element, the inputs of which are connected respectively to the other output of the first counter and synchronization unit, and the output is connected to the first inputs of the first and second multiplexers, second inputs which are connected respectively with the first outputs of the fourth and third counters, the third inputs are with the synchronization unit, their outputs are respectively with the first inputs of the third and fourth counters, the second inputs to toryh connected to the synchronization unit outputs - to sootvetst-. the corresponding inputs of the memory block, the output of the program task block is connected to another input of the second counter.