SU590784A1 - Device for displaying graphic information on crt screen - Google Patents

Description

(54) DISPLAY DEVICE

GRAPHIC INFORMATION

ON SCREEN ELECTRON-BEAM

PIPES (CRT)

The invention relates to the field of computer technology, and more specifically to devices for displaying graphical information on an electronic computer, followed by recording on microfilm, in particular for building seismic sections.

A device for constructing temporal seismic sections is known, comprising a drum with a photo carrier, a cathode ray tube (CRT) with a lens, a reproducing device, a horizontal scanning unit and a mechanism for moving a CRT 1. Such devices have a low speed of building seismic information1, and (from 3 to 6 seid on the track), very complex and unreliable synchronization system, require a lot of machine time when building a seismic section. Mechanical movements of the cathode ray tube relative to the photographic material do not allow for high quality and accuracy of the cut construction.

The closest in technical essence is a device comprising an interface unit connected to a first register and a vertical beam deflection unit connected to a recording unit connected via a beam deflection control unit.

with a deflecting system CRT, and to a horizontal beam deflection unit connected to a deflecting system CRT associated with a vertical beam deflection unit, a registration unit connected to a registration control unit connected to the beam deflection control unit 2.

However, when interpreting geophysical

The data often raises the task of detailed analysis of the seismic section with a large gain scale along the time axis (0.75-f- 0, 375 seconds). At such a scale, the sweep along the time axis is discrete values

the amplitudes of the seismic trace will be separated from each other by a considerable distance, the curve will have gaps, which will not allow to analyze the output information qualitatively and with high accuracy,

Especially when deriving a large number of seismic traces.

The aim of the invention is to improve the accuracy of the device.

The goal is achieved by the fact that

A device is connected in series to a number sign detection unit associated with an interface unit, a code converter connected to the first register and a vertical beam deflection unit, a second register connected to a code converter, a subtraction unit connected to a vertical beam deflection block, a dividing unit, increment register, increment counter, intermediate value counter and command distributor connected to the horizontal and vertical beam deflection blocks by the control unit off by a beam and an increment register, a comparison unit connected to a second register, a vertical beam deflection unit and an increment counter, and a scaling mode unit connected to a dividing unit and an intermediate value counter.

The drawing shows a block diagram of the proposed device.

The device comprises: interface unit 1, code converter 2, first register 3, unit for determining the sign of number 4, unit for vertical deflection of beam 5, deflection system of CRT 6, CRT 7, second register 8, subtraction unit 9, division unit 10, register increments 11, increment counter 12, comparison unit 13, mode and mass stabilization unit 14, intermediate values counter 15, command distributor 16, beam deflection control unit 17, beam horizontal deflection unit 18, recording unit 19, registration control unit 20 and registration unit 21 .

The device works as follows.

The information arriving at the interface unit 1 via the first register 3 is fed to the code converter 2, where the control signal from the number 4 characteristic indicator block 4 is received, depending on which code converter 2 forms a positive number from any (positive or negative) code on the second register 8 and the block of the vertical deflection of the beam 5 for further processing. Improving the accuracy of seismic sectioning can be achieved by increasing the scale of the time axis information displayed on the CRT 7 screen along a constant scale scale along the amplitude axis. To do this, in the proposed device, the elementary shift rod along the time axis (X axis) remains constant, and the number of intermediate points required for the calculation is determined by the scale of the image.

The mode and mass stabilization unit 14 is set to the position corresponding to the selected scale. The information coming from the output of the code converter 2 is fed to the input of the second register 8, where it is stored for the cycle time, and then to the comparison block 13, where it is compared with the previous number (point) recorded in the counter of the Y coordinate of the vertical deviation unit of the beam 5 .

At the same time, information from the output of the second register 8 is fed to the input of the subtraction unit 9, which subtracts the previous number recorded in the counter of the Y coordinate of the vertical deflection unit of the beam 5 from the incoming one and the result increment along the Y axis is fed to the division unit 10, where by a binary number proportional to the selected output scale coming from the mode and scaling block 14. The result of the division — the value of the increment obtained along the Y axis with an elementary schag X axis — is stored on the register eny 11.

According to the signal from the command distributor, the 16th number of the increment register I is entered into the increment counter 12, which is made reversible. Depending on the sign of the increment coming from the comparison block 13, the increment counter 12 performs summation or subtraction of the elementary leads at the same time as the counter of the Y coordinate of the vertical beam deflection block 5. At the same time, the beam on the CRT screen moves to the elementary pin on the output of the block vertical deflection of beam 5 to block 6 and CRT 7.

When working out each elementary increment from the command distributor 16 to the beam deflection control unit 17 and further to the deflecting system of the CRT 6 and the CRT 7, a command is issued to illuminate each elementary axis along the Y axis. After the increment counter 12 AY works, the beam is moved to the elementary axis X axis, for which the output of the increment counter 12 through the command distributor 16 receives a control command to the counter of the X coordinate of the horizontal deflection block of the beam 18 and then to the deflecting system of the CRT 6 and the CRT 7.

Simultaneously, according to the command distributor signal 16, the beam deflection control unit 17, the deflecting system of the CRT 6 and the CRT 7, receives a signal for illuminating the point along the X axis. . Then, the command distributor signal 16 from the increment register 11 again records the number AY in the increment counter 12 and the operation is repeated in the same way until all the elementary segments defined by the scale have been processed and the signal from the comparison unit 13 is received the equality of the values recorded in the second register 8 and in the block of the vertical deflection of the beam 5.

Claims (2)

When they are equal, the command to enter the next point from the computer and the interface unit 1 is sent from the distributor of commands 16 to the unit of the deviation of the beam 17 and the work cycle is then repeated. The information received by the CRT is displayed on the screen and simultaneously recorded on the microfilm using the recording unit 21. When the frame is completely filled from the beam deflection control unit 17, a command is sent to the registration control unit 20, which generates a frame change signal on the registration unit 21. The proposed device provides : increase the accuracy of seismic reserves building due to the fact that it calculates not only final, but also intermediate points, the number of which (up to 16) is determined by the selected mass headquarters (0.75 or 0.375 seconds), with the maximum distance ms} to the output of the discrete values of the points remains the same as when displaying information on a scale of 6 seconds; increase in speed by 20-f-25 times as compared with devices that allow the output of information represented only by positive numbers, due to the transformation of the incoming information in the form of both positive and negative numbers by the device itself. In addition, the increased accuracy and better quality of the displayed material increases the accuracy of interpretation of geophysical material. As a result of the use of additional units, the cost of machine time for processing is reduced, and consequently, the cost of these works, labor productivity increases. An apparatus for displaying graphical information on a cathode ray tube (CRT) screen, comprising a interface unit connected to a first register and a vertical beam deflection unit connected to a recording unit connected through a beam deflection control unit to a CRT deflection system to a horizontal beam deflection unit connected to a CRT deflection system connected to a vertical beam deflection unit, a recording unit connected to a registration control unit connected to the unit control of beam deviation, characterized in that, in order to improve the accuracy of the device, a serially connected number sign determining unit connected to the interface unit, a code converter connected to the first register and a vertical beam deviation unit, the second register, are inserted into it; connected to a code converter, a subtraction unit connected to a vertical deflected beam unit, a division unit, an increment register, an increment counter, an intermediate value counter, and a command distributor connected th blocks with horizontal and vertical beam deflection, beam deflection control unit and increments register, the comparator, connected to the second register unit vertical deflection of the beam and the counter increments and the block mode and masschtabirovani coupled to the counter and dividing the block of intermediate values. Sources of information taken into account during the examination 1. USSR author's certificate No. 261724, G 01V 1/28, 1968. 2. Vasilyeva, V.P., et al. Report on topic L 618 “Development of a high-speed photo builder, Novosibirsk, 1973, p. 81 - 107.