SU807362A1 - Device for shaping vectors on crt screen - Google Patents

Description

The invention relates to k automatics and computing, in particular, to the information imaging technique and can be used for visual presentation. A device is known for generating vectors on a screen of a cathode ray tube (CRT), comprising a pulse generator, a register, and a digital-to-analog converter fl. The disadvantage of this device. This is the lack of orientation of graphic information relative to PCB. The closest in technical essence to the present invention is a device for forming vectors on a CRT screen, containing a register, the first output of which is connected to the first input of a digital interpolator, the second input of which is connected to the output of a pulse generator, two counters, the outputs of which are connected to an input terminal. corresponding digital-to-analog converters 2. A disadvantage of this device is the impossibility of changing the orientation of a single set of vectors, for example, intended to display airborne information relative to another set of vectors, for example, intended for displaying graphical information. The purpose of the invention is to expand the field of application of the device due to the possibility of changing the orientation of one. Node of vectors relative to another. The goal is achieved by the fact that the device contains a coordinate code converter, the input of which is connected to the output of the digital interpolator ,. three adders, the inputs of the first adder are connected to the first output of the coordinate code converter and the second register output, the first inputs of the second and third adders are connected to the output of the pulse generator, and the outputs are connected to the inputs of the corresponding counters, and the block of parametric functions, the first and second inputs connected respectively to the second output of the coordinate code converter and the output of the first adder, and the outputs are connected to the second inputs of the second and third adders, as well as the fact that. The parametric function block contains constant gates whose outputs are connected to the first inputs of the multipliers, the second inputs of which are the first inputs of the block. Nafig 1 shows the structural | Device diagram; in fig. 2 - a set of approximating vectors with indication of the angle code, X1 each of the approximating vectors is mapped to one; in fig. 3 - structural. ma parametric functions block. The device contains a register 1, a pulse generator 2, a digital interpolator 3, the first counter 4, the second counter 5, the first digital-analog converter 6, the second digital-analog converter 7, the coordinate code converter 8, the first adder 9, the block 10 of parametric functions, the second adder 11, a third adder 12, a fixed memory 13, a first multiplier 14 and a second multiplier 15. Register 1 is intended for receiving and storing for the time of building the vector of the vector increment codes of the vector coordinates and the vector orientation change code. A pulse generator 2 is designed to form pulse sequences. Digital interpolator 3 is designed to form the number-pulse codes of the Cartesian coordinates of the approximating vector. The converter 8. coordinate codes is designed to convert the Cartesian coordinates of the approximating vector to polar coordinates. The first (combinational) adder. 9 summarizes the vector orientation change code arriving from the second output of register 1 with the angle code of the approximating vector arriving from the first output of the coordinate code converter 8. The block 10 of parametric functions is intended to form the codes of the increments of the coordinates of the approximating vector, taking into account the required orientation change. The second and third (accumulating) adders 11 and 12 are designed to form the number-impulse codes of the coordinates of the vector coordinates, taking into account the orientation change. The first and second (reversible) counters 4 and 5, together with the first and second digital-to-digital converters 6 and 7, are designed to convert the number-pulse codes of vector increments of coordinates with the output of the second and third (accumulating dich) adders 11 and 12 into stepwise varying tension The permanent memory 13 is intended to store the codes of the table functions of the sine and cosine of the angle of the approximation vector. The first and second multipliers 14 and 15 are designed to multiply the sine codes (the first multiplier. Tel 14) and the cosine (the second multiplier 15) of the angle of the approximation vector by the input napaiifeTpa. The device works as follows. In register 1 from an external device, the codes for the increments of the coordinates of vector A and the code for changing the orientation of the vector are recorded. These sneakers are stored in register 1 of vector construction time. The increment codes of the vector coordinates from the first output of register 1 are fed to the first input of the digital interpolator 3, to the second input of which signals from the pulse generator 2 are supplied. The digital integrator 3 in each clock interval generates signals defining an approximation vector (Fig. 2). At the output of the digital interpolator 3, the magnitude and sign codes appear from the Cartesian coordinates of the approximation vector, and the magnitude of any coordinate component of the approximating vector is either O, or 1. The signals from the output of the digital interpolator 3 arrive at the input of the converter 8 of the coordinate codes, in the coordinate code converter 8, which is a combinational circuit, the codes of the Cartesian coordinates of the approximating vector are converted into polar coordinate codes. The polar coordinates of the approximation vector are represented by four binary bits. Three bits define the angle of the approximating vector and are the first output of the converter 8 coordinate codes. One bit determines the presence of a non-zero length approximating vector and is a gating signal. The youngest of the three angle bits carries additional information about the length of the approximating vector (Fig. 2) and is a resolution signal. If this bit is O, then the length of the approximation vector is 1, if this bit is 1, then the length of the approximation vector is 1.41. The strobe and enable signals are the second output of the coordinate code converter 8. The code of the angle of the approximating vector from the first output of the converter 8 coordinate codes is fed as the first term to the first and third inputs of the first (combinational) adder 9. The code for changing the orientation of the vector from the second output of register 1 is fed to another input of the first (combinational) adder 9 8 term. At the output of the combinational adder 9, the code of the angle of the approximation vector is generated taking into account the change in orientation. This code goes to the second input of the block of 10 parametric functions. The signal from the second output of the converter 8 coordinate codes

supplied to the second code block of 10 parametric functions. The signal from the second output of the converter In the coordinate codes is fed to the first input of the block 10 parametric functions. The block of 10 parametric functions of shapes forms the Cartesian coordinates of the approximating vector taking into account the change in the orientation and length. Thus, the signals at the outputs of the parametric function block 10 are the sine and cosine functions of the angle of the approximation vector, taking into account the change in orientation, multiplied by a parameter whose value can be 0 or 1, or 1.41. Codes from the outputs of the block 10 parametric functions are sent to the information inputs of the second 11 and third 12 accumulating adders and the signal from the pulse generator 2 is added to the content of the accumulating adders 11 and 12. At the outputs of the accumulating cyiviMaTOpOB 11 and 12, the number of pulse increment codes of the vectors c is formed considering a change in orientation. These pulse number codes are accumulated in reversible counters 4 and 5. Signals from the outputs of these counters are converted to analog-to-digital converters b and 7 into analog form in the form of linearly varying step voltages.

The parametric functions unit 10 is implemented as a set of fixed memory 13 (FIG. 3; and two multipliers 14 and 15. The second input of the parametric function unit 10 is the input of permanent memory 13. The codes of the two outputs of the fixed memory 13 are codes of the sine and cosine functions of the angle of a vector of unit length, i.e., the usual table function of the sine and cosine of an angle. These codes are fed to the inputs of multiplicative multipliers 14 and 15. The first input of the parametric functions block 10 is the input of the multiplier code of multipliers 14 and 14. 1 in high resolution It provides multiplication of multiplicable functions by a parameter equal to 1. Simultaneous presence of an enabling signal generates a code in lower order multipliers equal to 0.41, and provides multiplication of multiplicand functions by a parameter equal to 1.41. Lack of enabling and gating signals provides multiplication of multiplicable functions by a parameter equal to zero. Such a block of parametric functions is suitable for use with a relatively large number of gradations of changing the orientation of vectors, for example, encoded with 8..11 bits, which carried out in devices for displaying radar and / or graphic information.

The device can be used in radar and (map) graphic information systems that are part of mobile objects, such as ships, aircraft, and allows you to display information oriented along the course or northward, including in the true display mode. movement, which creates a real positive effect: information to the operator in order to ensure the safety of navigation and aircraft flights. The use of the device in the indicated indicators allows the computer to be significantly relieved of processing graphic information when the course of a moving object changes, including the use of a smaller computer model.

The device can also be used in information display systems, modeling of turns of objects during design work.

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Claims (2)

1. Device for generating vectors on an electron beam screen 0 tubes, containing a register, the first output of which is connected to the first input of the digital interpolator, the second input of which is connected to the output of the pulse generator, two counters, 5 outputs of which are connected to the inputs of the corresponding digital-to-analog converters, characterized in that, in order to expand the field of application of the device by 0 the possibility of changing the orientation of one set of vectors relative to another, it contains a coordinate code converter, the input of which is connected to the output of the digital interpolator, three adders, and 5 inputs of the first adder are connected with the first output of the coordinate code converter and the second output of the register, the first inputs of the second and third adders are connected to 0 to the output of the pulse generator, and the outputs are connected to the inputs of the corresponding counters, and a block of parametric functions, the first and second inputs of which are connected respectively 5 but to the second output of the coordinate code converter and the output of the first adder, and the outputs are connected to the second and second inputs of the second and third adders. 0 2. The device according to claim 1, wherein the block of parametric functions contains a fixed memory, the outputs of which are connected to the first inputs of the multipliers, the second inputs of which are the first inputs of the block. Sources of information taken into account during the examination 1. The second certificate of the USSR 0542213, cl. G About K 15/20, 1975. 2. Certificate of authorship CCCg / 525980, C.A06 К 15 / 20,1974 (prototype) W 13