SU1161972A2 - Device for reading graphic information - Google Patents

Abstract

1. DEVICE FOR READING GRAPHIC INFORMATION on auth.St. No. 805368, differing from the fact that, in order to increase the speed of the device, it contains separation elements, the inputs of which are connected to the outputs of the coordinate remover and the generator of sinusoidal oscillations, a group of adders, one input of which is connected to the outputs of the corresponding blocks of discrete and piecewise analog signals, and the outputs are connected to the inputs of the corresponding units for determining the coordinates, and the second group of phase-sensitive detectors, the inputs of which are I) Ps are connected to the corresponding separating and the elements and to a generator of sinusoidal oscillations, and outputs connected to other inputs of corresponding adders group. 2. The device according to claim 1, characterized in that the block of forming discrete and piecewise analog signals contains a group of keys, some of the inputs of which are the inputs of the block, others are connected to the corresponding outputs of the multi-phase trigger connected to the inputs of the OR element, and the outputs the keys of the group are connected to the inputs of the isolating amplifier, the key whose inputs are connected to the isolating amplifier and to the output of the counting trigger connected to the output of the OR element, the outputs of the key are connected to the inputs of the paraphase amplifier, and zero s, inputs of which are block inputs and outputs connected to respective inputs "b multiphase trigger. (L 3. The device according to claim 1, differing in that the unit for determining the coordinates contains serially connected reversible counter, the first and second inputs of which are the first and second inputs of the block, and the third input is connected to the comparator, digital-analog converter and adder Another input; about to which is the third input of the block, the third input is connected to the source of the reference voltage, and the output is the output of the block. 4. The device according to claim 1, characterized in that the coordinate remover contains an angle deviation sensor in the form of an electrolytic converter of the angular deviation from the vertical axis.

Description

The invention relates to automation and computing and can be used to enter graphic information into electronic computers.

According to the main auth. No. 805368, a device for reading a graphic information containing a tablet with coordinate tires made in the form of groups of rectangular loop windings with a constant height and variable width of each loop in the windings, the geometric centers of the rectangular windings of individual ones are known. groups are shifted relative to each other along the corresponding coordinate axis, with one of the ends of the rectangular loop windings of each group being connected to one of the input phase detectors The outputs of which are connected to the inputs of the formation units of discrete and traditional analog signals, the outputs of which are connected to the corresponding inputs of the determination units, and the outputs of the sinusoidal oscillator are connected to the coordinate remover and the other inputs of the phase detectors, and 30 Multiple and piecewise analog signals contain keys, developing and paraphase amplifiers, zero-organs, multi-phase and counting triggers and an OR logic element, and the inputs of the JS blocks are connected to the input zero-organs and the first inputs of one of the keys, the second inputs of which are connected to the outputs of a multiphase trigger, and the outputs via an isolating amplifier 40c with the first input of another key, the second input of which is connected to the output of the counting trigger, and the outputs through a paraphase amplifier to one of the block outputs, the other output of which is co-45 dinene with the input of the Counting trigger and the output of the logic element OR, whose inputs are connected to the outputs of the multi-phase trigger, whose input is connected to the outputs of the zero-organs, and 50 The coordinate list contains a reversible counter, the converter code - voltage, a sign comparator, an adder and a source of reference voltage, the output of which is connected to the first input of the cyator, the second input of which is connected to one of the inputs of the block and the input of the sign comparator, the output of which is connected to the first input of the reversible counter, the second input of which is connected to another input of the block, the output of which is connected to the output of the adder, the third input of which is connected to the output of the converter code - voltage, the input of which is connected to move down counter 03

A disadvantage of the known device is inconvenience in operation and low reading speed, since during the reading of information, the operator needs not only to point the puller at the read points, but also to strictly maintain the puller perpendicular to the plane of the tablet. In the case of a tilt angle between the plate normal and the longitudinal axis of the puller, the distance between the center of the puller excitation coil and the coordinate coils of the plate changes, and the transition points of the output signals of the phase detectors are shifted through zero, which leads to a change in the value of the piecewise analog signal the introduction of additional errors Therefore, to ensure sufficient accuracy of reading, the operator must strictly maintain the coordinate remover perpendicular to the tablet during the reading of information, which causes great inconvenience in operation.

The purpose of the invention is to increase the speed of the device.

The goal is achieved by the fact that the device for combining graphic information contains separation elements, the inputs of which are connected to the outputs of the coordinate remover and the generator of sinusoidal oscillations, a group of adders, one inputs of which are connected to the outputs of the corresponding blocks of forming discrete and piecewise analog signals, and the outputs are connected with the inputs of the respective units for determining the coordinates, and the second group of phase-sensitive detectors, whose inputs are connected to the corresponding sections Yelnia elements and to a generator of sinusoidal oscillations, and outputs connected to other inputs of corresponding adders group.

In addition, the block forming discrete and piecewise analog signals contains a group of keys, some of the inputs of which are the inputs of the block, others are connected to the corresponding outputs of a multiphase trigger connected to the inputs of the OR element, and the outputs of the keys of the group are connected to the inputs of the booster amplifier, the key The inputs of which are connected to the decoupling amplifier and the output of the counting trigger connected to the output of the OR element, the outputs of the key are connected to the inputs of the paraphase amplifier, and the zero-organs whose inputs are the input The unit is connected to the corresponding inputs of the multi-phase trigger.

The coordinate determination unit contains a series-connected reversible counter, the first and second inputs of which are the first and second inputs of the block, and the third input connected to the comparator, the digital-to-analog converter and the adder, the other input of which is the third input of the block, the third input connected to the source the reference voltage, and the output is the output of the unit, and the coordinate remover contains an angular deviation sensor, made in the form of an electrolytic converter of the angular deviation from the vertical and.

FIG. 1 shows a functional diagram of the device; in fig. 2 arrangement of three coordinate rolling groups for determining one coordinate; FIGS. 3 to 5 are timing diagrams of signals explaining the operation of the device.

The device (Fig. 1) contains a plate 1, a coordinate remover 2 that includes an excitation coil 3 and an angular deviation sensor 4, made in the form of an electrolytic deviation angle deviation from the vertical axis, a generator of 5 sinusoidal oscillations, the first group of detectors 6-11, blocks 12 and 13 of forming discrete and piecewise analog signals, blocks 1A and 15 of determining the coordinates, separation elements 16 and 17, made in the form of transformers, the second group of phase-sensitive detectors 18 and 19 and group of adders 20 and 21.

Tablet 1 is made of an insulating material, on the surface of which grooves with a certain

step, for example, equal to 1/6 of the width of the coil, having 3 rectangular thermal windings along the coordinates X and Y, respectively. To determine the horizontal coordinate, three groups of windings are used, laid into grooves and shifted relative to each other by 2/3 of the coil width. Coordinate coils have periodically

The repeating shape and for increasing the linearity of the conversion characteristics are made in the form of rectangular loops nested into each other (Fig. 2). Perpendicular to first laid

5 other three groups of coils for defining a vertical coordinate.

A thin insulating sheet is placed on the surface of the tablet 1 on which the information carrier is attached. The outputs of the coordinate coils are connected to the inputs of phase detectors 6-11. The puller 2 has the shape of a pencil, on the pinhole of which the exciting coil 3 is wound, powered by the current of the generator of 5 sinusoidal oscillations and intended to excite the coordinate coils. In addition, a signal sensor is mounted at the opposite end of the puller 2 for measuring the deflection angle of the puller 2 from the vertical direction. Sensor A has four cylindrical electrodes insulated from each other, installed circumferentially in the converter cover. The hermetic case of the transducer, formed by a cap of insulating material and a spherical base of conductive material, is not completely filled with electrolyte: a part of the volume is occupied by an air bubble. When the transducer is horizontal, the bubble is located in the center and covers about half the area of each of the four electrodes. In this case, the conductivity between the base of the housing and each of the electrodes are the same. When the transducer 4 is tilted, the air bubble is displaced from the center, the conductivity equality is violated, and on the secondary windings of transformers 16 and 17 signals appear that are proportional to the angles of inclination of the puller axis 2 coordinates from

verticals in two mutually perpendicular planes. In this case, the signals on the secondary windings of transformers 16 and 17 carry information not only about the values of the angles of inclination of the puller axis 2 coordinates from the vertical in two mutually perpendicular planes, but also about the direction of inclination of the puller axes 2 coordinates in these areas. The generator 5 of sinusoidal oscillations is also connected to the reference inputs of phase detectors 6-11, which. are intended to demodulate the induced emf in the coordinate coils of mutual induction and suppress spurious signals from the outside. The dependences of the demodulated signals on the movement of puller 2 along the X and Y coordinates are shown in FIG. 3q. The dependences of the demodulated signals on the displacement are due to the fact that the groups of coordinate coils have a periodically repeated shape (Fig. 2). When the axis of the puller 2 is tilted, the center of the excitation coil 3 is shifted towards the axis of the puller 2 in the corresponding plane, which is proportional to the angle of inclination of the puller 2, which leads to a conversion error. At the same time, the dependences of the demodulated signals also shift from the movement of puller 2 along the X and Y coordinates depending on the angle of inclination of the puller axis 2 coordinates in the corresponding plane and from the inclination direction of the puller axis 2 in the corresponding plane. Blocks 12 and 13 are designed to form discrete and piecewise analog signals (Fig. 3B) and to output discrete pulses at times when the demodulated signals of the phase detectors 6-11 reach the zero level (in Fig. 2a, the signals for the X coordinate are shown). Blocks 12 and 13 contain a group of keys 22-24, null-organs 25-27, a multi-phase trigger 28, an element OR 29, decoupling an amplifier 30, a key 31,. A phased amplifier 32, a counting trigger 33. The keys 22-24 connect the signal phase detectors 6-8 4k to amplifier 30, if control inputs of switches 22-24 receive control pulses from multiphase trigger 28. Nullorgans 25-27 form high potentials when zero-level signals from phase detectors 6-8 pass. The trigger 28 controls the operation of the keys 22-24 and the element. OR 29. Only the trigger output 28 has a high potential, to the corresponding input of which a short pulse from the zero-organs 25-27 is not applied. Thus, a group of coordinate coils is connected to the input of amplifier 30, at the output of which the signal passes through a zero level. The element OR 29 forms the output signal shown (Fig. 3b) in the form of short pulses when pulses are received from the output of the flip-flop 28, and thus when the signal passes in any group of coils through the zero level. The amplifier 30 is designed to isolate the output circuits of the three keys 22-24 and the input of the key 31. To get (fig. 3 q) the desired piecewise analogue characteristic (fig. 3fii), negative tilts must be inverted when moving from left to right, and opposite movement must invert the positive slopes. Thus, when the puller 2 moves, the paraphase amplifier 32 should change the sign of the gain after each discrete pulse of the element OR 29. When the puller 2 moves to the right along the X axis after the arrival of the first pulse (Fig. 3b) at the output. The trigger-33 with a counting input is zero (Fig. 3g), since the control signal is zero, the key 31 converts the input signal to the output and the output signal of the third group of coils is connected to the inverting input of the amplifier 32. The gain of the amplifier 32 ( Fig. Ze is negative and the negative slope of the characteristic is inverted to positive. Upon receipt of the next discrete pulse at the output of the trigger 33, a signal appears (Fig. 3) with a positive level, which translates the key 31 to the previous position. Thus, the non-inverting input of the amplifier 32 receives a signal from the output of the second group of coils. The gain of amplifier 32 has a positive sign (Fig. Ze), and the piecewise analog conversion characteristic has a positive slope. Upon further movement, the puller 2 to the right along the X axis performs similar switchings of the key 31. If the puller 2 that has reached point a (Fig. 3a) starts to move to the left, then the variable output signal of the third group of coils at the point is zero, but the trigger 28 does not change its states, since the null body 27 gives a high potential to the same trigger 28. Thus, in the code of the element OR 29, a discrete pulse does not appear, and the trigger 33 does not change its state (Fig. A) At the output of the amplifier 32 there is a negative polarity signal. Upon further movement of the puller 2 to the left, a discrete signal appears at the output of the OR element 29, which changes the state of flip-flop 3 (Fig. 3A), and the key 31 connects the output signal of the first group to the inputs to the inverting input of the amplifier 32. The gain of the amplifier 32 is negative sign (Fig. 3). Thus, the piecewise analog transform characteristic has negative slopes. Upon further movement of the puller 2 to the left, similar switches of the key 31 are made. A piecewise analogue signal, besides information about the position of the puller 2 between positions, i.e. in the interval between two discrete pulses (Fig. 3S, b), carries information about the direction of movement, the amplitude of which exceeds one position loop. When moving to the right, this signal has only a positive field, and when moving to the left, it has a negative one. Blocks 14 and 15 are designed to form analog signals corresponding to the full movement of puller 2 in the horizontal and vertical coordinates. Both analog signals are output simultaneously. . Blocks 14 and 15 contain a reversible counter 34, a character comparator 35, a digital-analog converter 36, a reference voltage source 37, and an adder 38. The device operates as follows. Assume that, at a given time, the puller 2 is in the center of coordinates, and its axis is perpendicular to the plane of the plate 1. With the help of the reset circuit, the counter 34 and the trigger 28 are reset. Thus, as can be seen from the plot (Fig. 4 and 5), at the initial moment of time the piecewise analog signal is zero (Fig. 45 and 5e), and there is no discrete signal (Fig. 4). Since, in the initial state, the trigger 28 has a high level at output 1 (FIG. 4d), the switch 22 switches, and the output signal of the first group of coils is fed to the input of the key 31. In addition, in the initial state, the trigger 33 has a high level ( Fig. 4L), whereby the switch 31 switches to output 1, and the gain of amplifier 32 has a positive sign (Fig. 4A). At the second and third outputs of the trigger 28 there are low levels (fig, 4ti, k). When moving the puller 2 to the next time point, the output signal of the first group of coordinate coils is connected to the non-inverting input of the amplifier 32. Since the axis of the puller 2 is perpendicular to the plane of the plate 1, the output signal of the phase-sensitive rectifier 18 is zero, and the output signal of the adder 20 is positive (Fig. 4B, 51), and the output signal (Fig. 5O of the comparator 35 At the second moment of time, the output signal of the third group of coil coordinates reaches the zero level (Fig.Zo), and the zero-organ 27 outputs a positive impulse (Fig. 4e, 5 g), which 1st M translates trigger 28 into the state in which at its third outlet, a high potential appears, and the rest low (Fig. 4h-,). Therefore, the key 24 switches, and the input of the key 31 receives a signal from the third group of coordinate coils. In addition, the output signal of the trigger 28 is fed to the input of the element OR 29, the output of which is a pulse Fig. 4x, 5), which is fed to the input of the counter 34 and the input of the trigger 33. The trigger 33 overturns and a low level appears at its input (Fig. 4A). Therefore, the key 31 switches and the output signal; The third group of coordinate coils is connected to the inverting input of amplifier 32, the gain of which is negative (Fig. 4m). At the third moment of time, the output signal of the second group of coils reaches zero and the zero-organ 26 tilts the trigger 28 into a state in which a high potential appears on its second output, and low on the others (Fig. 4Q, 4, u, k, fig. 5 &). In this case, the key 23 connects the output signal of the second group of coordinate coils to the input of the key 31. In addition, the element OR 29 outputs a pulse (Fig. 4; i, Pro), which is summed up in the counter 34 and overturns the trigger 33 (Fig. 4l). The output signal of the trigger 33 switches the key 31 to the previous state, and the output signal of the second group is connected to the non-inverting input of the amplifier 32. At the output of the converter 36, a voltage is generated (Fig. 5), which is summed up in the adder 38 with the input voltages. The full signal corresponds to the movement of the puller 2 along the X axis (Fig. 5k). At the fourth time point (Fig. 4 a), the puller 2 changes the direction of movement, and at the fifth time point the output signal of the second group of coordinate coils again reaches zero level, however, the trigger 28 does not change its state. Thus, at the fifth instant of time, a pulse does not appear, and no switchings take place. Since the piecewise analog signal with further movement of the puller 2 becomes negative, there is a negative voltage at the output of the sign comparator 35 (Fig. 3). Suppose that with further movement of I of puller 2 it is deflected by a certain angle in the direction of decreasing coordinate, so that the input signal of the third group of coordinate coils is zero (Fig. 48), and the switching occurs similar to the switching at the second time instant. In this case, the element OR 29 produces a pulse, although the tip of the puller 2 did not reach the border of the next zone (Fig. 4b, Per). a positive polarity and, thus, at the output of the adder 20, a signal appears (Fig. 4 & 5), with which the adder 38 compensates for the error caused by the inclination of the puller 2 axis. If the puller 2 further moves has a slope at the same angle, then at the next moment of time, the zero level reaches the output signal of the first group of coordinate coils (Fig. 4) and it occurred. d t switch, similar to the switch at the first time. In this case, the first group of coordinate coils is connected to the inverting input of the amplifier 32, and the OR element 29 produces a signal, although the tip of the puller 2 has not reached the border of the next zone (Fig. 4b, 5a). However, the error due to the inclination of the axis of the puller 2 is compensated in the same way as in the previous case. In the same way, the compensation of the error caused by the tilt of the puller axis in the direction of increasing the coordinate is carried out. Similarly, the other coordinate is determined. It is essential that both coordinates are determined simultaneously, and the total movement along the corresponding axis is determined by determining the number of discrete steps and summing up with the amount of movement in the zone of one position determined by the input signal of the adder. Moreover, the number of pulses is determined by summing the number of pulses generated with a positive piecewise analog signal and subtracting the number of discrete output pulses formed with a negative polarity of the piecewise analog signal. The resulting output signals of the device, the amplitude of which is proportional to the position of the puller relative to the selected center of coordinates, are analog in the entire plane of the tablet. Thus, the use of new elements connected by the proposed scheme favorably differs the proposed device for reading graphic information from the prototype device, since it allows to significantly speed up the process.

readout, reduce operator fatigue and ultimately leads to increased operational efficiency. The latter is due to the fact that the device eliminates the requirement of a rigid orientation of the coordinate remover and possible deviations of the puller axis from the normal of the tablet, within

, while maintaining the same accuracy.

The application of the proposed device increases the speed of reading the coordinates by about 1.5 times, and also reduces the number of errors and ultimately improves the quality of work.

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Claims (4)

1. DEVICE FOR READING GRAPHIC INFORMATION according to ed. No. 805368, characterized in that, in order to improve the speed of the device, it contains dividing elements, the inputs of which are connected to the outputs of the coordinate picker and to the sinusoidal oscillation generator, a group of adders, one of whose inputs are connected to the outputs of the corresponding discrete and piecewise-analog block signals, and the outputs are connected to the inputs of the respective coordinate determination units, and a second group of phase-sensitive detectors, the inputs of which are connected to the corresponding ones. with dividing elements and with a generator of sinusoidal oscillations, and the outputs are connected to other inputs of the corresponding adders of the group. 2. The device according to claim 1, wherein the block for generating discrete and piecewise-analog output signals contains a group of keys, some of whose inputs are inputs of the block, others are connected to the corresponding outputs of the multiphase trigger connected to the inputs of the element OR, and the group key outputs are connected to the inputs of the decoupling amplifier, the key whose inputs are connected to the decoupling amplifier and to the output of the counting trigger connected to the output of the OR element, the outputs of the key are connected to the inputs of the paraphase amplifier, and null organs, in whose moves are the inputs of the block, and the outputs are connected to the corresponding inputs of the multiphase trigger. 3. The device according to claim 1, characterized in that the coordinate determination unit contains a reversible counter connected in series, the first and second inputs of which are the first and second inputs of the unit, and the third input is connected to a comparator, a digital-to-analog converter and an adder, the other input of which is the third input of the block, the third input is connected to a reference voltage source, and the output is the output of the block. 4. The device according to claim 1, wherein the coordinate remover comprises an angular deviation sensor made in the form of an electrolytic converter of angular deviation from the vertical axis. SU „1161972 1161!