SU1418905A1 - Time-to-number converter - Google Patents

Abstract

The invention relates to automation and computing, is intended for data entry into digital computers and can be used in radar systems, as well as in computer aided design systems. The aim of the invention is to improve the speed and accuracy of the time-code converter. The goal is achieved by the fact that a shaper 7, the first trigger 4, the subtractive counter 5 and the adder 6, are entered into the converter containing the clock generator 1 pulse, element 2, delay element 7, element 8, two blocks 9, 10 elements AND, an inverter unit 11 and a second trigger with their connections. The introduction of elements and connections provides an adaptation of the step of moving the marker to the operator-changeed angular velocity, a displacement sensor that sets the switching pulse to the input of the first trigger I, 2 Il. (L

Description

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The invention relates to automation and computing, Ha4etio technology for data input to digital computers and can be used in computer-aided design systems.

The purpose of the invention is to increase the speed and accuracy of the converter.

FIG. I shows the functional diagram of the time interval into code converter; in fig. 2 - functional diagram of the device for removal of the marker from the screen of a CRT.

The converter of the time interval into the code contains a clock generator of 1 pulses, an element 2, a delay element 3, a first trigger 4, a subtractive counter 5, an adder 6, a pulse former 7, an element OR 8, a first block 9 of elements AND, a second block 10 of elements AND, block 11 inverters and the second trigger 12.

The device for retrieving the coordinates of the marker from the CRT screen contains a ball 13 of an electromechanical sensor of rectangular coordinates that is frictionally connected with the converter 14 time — a code along the Y coordinate and with a converter 15 — time — a code along the X coordinate, a converter 16 of the time interval into the code along the X coordinate , the time interval converter 17 to the Y coordinate code, the third 18 and fourth 19 blocks of elements I, the first 20 and second 21 current drivers, the coordinate input block 22, the first 23 and second 24 direct current amplifiers (DCA), the deviation system 25 teaching on X-axis, the beam deflection system 26 along the Y-axis, a CRT 27, a marker generator 28.

The converter works as follows.

When power is applied, a setup signal is generated, setting trigger 12 to its initial state, nulling the accumulating adder 16 and setting all bits of the counter 5 to the state of logical one.

At the same time, the zero-dimensional coordinate codes of the center of the marker arrive at the information inputs of the formers 20 and 21 and with the arrival of synchronizing pulses the control inputs and with some delay the marker currents 28 corresponding to the center of the CRT screen 27 are input.

In addition, the components of the character-synthesizing figure (marker) arrive at the second inputs of the DCF 23 and 24, and the corresponding duration of the illumination pulse enters the input Z of the CRT 27, providing illumination of the CRT beam during the formation of the image of the marker.

To align the marker with the mark, the operator rotates the ball 13 in the desired direction. The rotation of the ball 13 is decomposed into components X and Y by the converters 14 and 15 time — a code generating pulse sequences, the time interval between adjacent pulses in which is inversely proportional to the corresponding component of the speed of rotation of the ball 13.

An odd pulse from the output of converter 14 flips trigger 12. Potential from a single output of trigger 12, arriving at the first input of element 2, allows clock pulses to arrive at the input of counter 5. The code in counter 5 decreases — the clock pulses of generator 1 are subtracted until the next time ( even) pulse to the counting input of the trigger 12. Thus, the smaller the gap between a pair of adjacent pulses, the larger the code in the counter 5 by the time of the even pulse from the output of the converter 14.

The fourth pulse transfers trigger 12, stopping the counting in counter 5, and the potential from the zero output of trigger 12, entering the driver 7, generates at its output a single pulse that arrives at the control input of the adder 6, provides addition or subtraction. Depending on the presence of a pulse of the sign at the input of the trigger 4, the potentials from the output of a single or zero output of the trigger 4 allow the direct (through block 9 elements I) or the inverse (through block 10 elements and) code to the input of the adder 6. to pass through the adder the output of the delay element 3 resets the trigger 4 to the initial state and through the element OR 8 sets all bits of the counter 5 to the state of one, and also forms the permission for the consumer to receive the code (CVM), arriving at the second inputs of the third 18 and fourth 19 blocks ENTOV And (if in block 22 is pressed klavipsh Entering coordinates), as well as to the third inputs

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formers 20 and 21 address currents (for a census into buffer registers of drivers).

With the arrival of the next odd pulse, the operation cycle of the transducers 16 and 17 is repeated.

Further, the codes X and Y at the time of time

not determined by the synchronizer pulse, at the second inputs of the formers 20 and 2J are converted into address currents X and Y, arriving at the inputs of amplifiers 23 and 24, from the outputs of which the deflecting currents enter the inputs of systems 25 and 26 of the beam deflection along the axes X and W.

After the end of the beam output to the center of the marker at the time determined by the pulse from the second output of the synchronizer, the components of the figure synthesizing the marker, which arrive at the second inputs of the amplifiers 23 and 2A, are formed at the first and second outputs of the marker generator 28, and the light output is generated at the third output, incoming CRT input 27. Thus, a marker is displayed at a point on a CRT screen 27 defined by X and Y addresses. The operator moves the marker to the required part of the screen with a quick movement of the hand, and then with a slow movement combines it with the mark. Codes in accumulating adders 6 converters 14 and 15 time - the code at this moment corresponds to the coordinates of the mark. The operator informs the computer about this, pressing in the block 22 of the input to the button on the coordinates for pickup. At the same time, in addition to the signal entering the computer, the potential from the key enters the third inputs of blocks 18 and 19 of the elements AND, ensuring the coordinate codes in the computer.

Claims (1)

Invention Formula The converter of the time interval in the code containing the clock pulse generator, the element And the element delays, the first trigger, the subtracting counter and the adder, characterized in that, in order to improve the speed and accuracy of the converter, it contains a pulse driver, an OR element, the first and second blocks of the AND components, the inverter unit and the second trigger, counting the input of which is the first information input of the converter, the reset input of the second trigger is the input of the initial setup signal of the converter connected to the first input of the OR element and to the input Setting the zero of the adder, the inverse output of the second trigger connected to the input of the pulse driver, the output of which is connected to the control the input of the adder and the input of the delay element, the output of which is the clock output of the converter connected to the reset input of the first trigger and to the second input the OR element, the output of which is connected to the installation input of the total counter reading, the counting input of which is connected to the output of the element AND, the first and second inputs of which are connected respectively, to the direct output of the second trigger and the output of the clock pulse generator, the outputs of the detracting counter are connected to the inputs of the inverter unit and the inputs of the group of the first block of elements And whose outputs are connected to the information inputs of the first group of adder, the outputs of which are the second outputs adder groups are connected to the outputs of the second block of elements And, the inputs of the group of which are connected to the outputs of the block of inverters, the input of the second block of elements And connected to the inverse output of the first trigger, the direct output of which is connected to the input of the first block of elements And, the counting input of the first trigger is the second information converter input.