SU1462091A1 - Device for measuring linear and angular displacements - Google Patents

Abstract

This invention relates to a measurement technique. The aim of the invention is to increase the measurement accuracy. This is achieved by taking into account the discrete displacement corresponding to the position of the object at the time of the beginning of measurements and at the end of them. When the object 35 is moved, the sensors 1, 2, and 3 read out the tag sequences, the order in which they are determined by the direction of movement. If the signal X comes first from the first sensor 1, then from the second 2 (Xj) or first from the second 2 (X ,,), and then from the third 3 (X) or first from the third 3 (X,), then from the first 1 (X,), then object 35 moves in one direction. If sig

Description

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If the bales arrive in reverse order, then object 35 moves in the opposite direction. The logical functions F ,,, and F X, X, j.X, describe all possible ways of following the sensor signals when the object 35 is moved in each of the directions. The output of the first element OR 26 is realized: the logical function F, the output of the second element of the element OR 27 is the logical 1 function 7. The reversible counter 34 performs algebraic summing of signals from the output of the sequence analysis block 4

signals and corresponding to the elements of the logical functions F and F. For the origin of the displacement, the displacement displacement is taken, which corresponds to the position of the object at the moment of the measurement start. Therefore, in the case when, after the first successive operation of two sensors, the object 35 is located from the initial position at a distance greater than one movement increment, an additional signal is generated in the device, which is also entered into the reversible counter 34, which corresponds to the real position of the object. 2 Il.

one

This invention relates to a measurement technique and can be used in instrumentation.

The purpose of the invention is to increase the measurement accuracy by taking into account the movement Discrete corresponding to the position of the object at the time of the beginning of measurements and at the end of measurements.

FIG. 1 shows the location of labels and sensors on the measurement object; in fig. 2 - functional device diagram.

The device contains sensors 1, 2, 3, which read the labels applied to the surface of the measurement object. Block 4 of the analysis of the sequence of signals, which includes these triggers 5–11, fourteen elements AND 12–25, 20 seven elements OR 26– 33, a reversible counter 34., On the measurement object 35, there are three, sequences of marks 36, 37 and 38, coupled with sensors 1, 2 and 3, a displacement with a displacement of 25 and a displacement unit, and h. The sensors 1, 2 and 3 are located in one plane, perpendicular to the axis of movement of the object 35. The signal sequence analysis unit 4 also contains a delay line 39.

The device works as follows.

Before starting the measurement, the device is reset, for which a pulse signal is applied.

the third inputs of the third, fourth, or fifth elements OR 28, 29, and 30, the zero inputs of the fifth 9 and sixth 10 flip-flops, the first input of the tenth IL-21 element, and the reverse input of the reversing counter 34. However, the direct output the seventh trigger 11 was a single signal; then, when the initial setup signal is applied at the output of the tenth element I 21, a signal that, having passed through the eighth element of the IL 33, goes to the counting input of the seventh trigger 11, which will work, causing a single signal at its inverse output.

When the object 35 is moved, the sensors 1, 2 and 3 read the sequences of marks 36, 37. and 38. The order of reading the sequences of marks is determined by the direction of movement. The signals from sensors 1j 2 and 3 are received in block 4 of the analysis of the sequence of signals in order due to the mutual arrangement of the sequences of marks 36, 37 and 38 on object 35 and sensors 1j2 and 3.

The direction of movement of the object 35 is determined in block 4 of the analysis of the signal sequence by analyzing the order of the two signals successively arriving from the sensors in the block.

So, for example, if the signal (X ,,) comes first from the first sensor

scheni), which corresponds to the real position of the object.

If after the first successive triggering of two sensors the object is located from the initial position at a distance less than one displacement increment (which corresponds to the even operation of the seventh trigger 11), then one will be entered into the reversing counter 34.

As a result, two sensors depending on the direction of motion at the output of one of the two open elements AND, included in the first six elements AND 12-17, send a signal that passes through the element OR 26 or 27 to one of the inputs of the fourth trigger. 8 and one of the first two inputs of the sixth element of the IL 31. At the same time, depending on the direction of movement of the object 35, a single or zero signal will arrive at the control input of the reversing counter 34 from the first output of the fourth trigger 8.

The signal from the output of the sixth element OR 31 is fed to the counting input of the reversible counter 34, to the single input of the sixth trigger 10 and to the first input of the fourteenth element I 25. Further signal flow depends on the state of the seventh trigger 11. (What determines the state of the seventh trigger 11 was considered above). If there was an even triggering. Seventh trigger 11, then the output signal is fourteen

With changes in the direction of movement of the object, the sensors are triggered inconsistently, and two responses of the same sensor (or several operations,

element 25 and an open unit Q if the object is oscillating e

output of the seventh trigger 11, to the second input of the fourteenth element I 25, from the output of which the signal goes to the first input of the eighth element OR 33, and then to the single input of the fifth trigger 9. As a result of the first trigger 9 being connected directly up The fifth trigger 9 - the second inputs of the eleventh 22 and twelfth 23 elements And this element will be open, and the inverse output of the fifth trigger 9 - the first input of the thirteenth element And 24 - will be closed by the last boot.

If there was an odd triggering of the seventh trigger 11, then the signal from the direct output of the seventh trigger 11 received at the third input

thirteenth element and 24, the latter will be open. Therefore, the falling edge of the signal coming from the output of the sixth element HJEi 31 will trigger the sixth trigger 10 and a single signal from its inverse output will go to the second input of the open thirteenth element AND 24. From the output of the thirteenth element AND 24 the signal will go to the third input of the sixth element OR 31 to further from the output of the sixth element OR. 31 to the counting input of the reversible counter 34. Since the control signal received from the fourth trigger 8 has not changed, in the reversing counter 34 the two signals will be summed up. The signal from the output of the thirteenth element And 24 also goes to the input linsh-i 39 delay, which provides a delay signal at the time of the sixth element OR 31 and the reversible counter 34. From the output of the delay line 39, the signal goes to the second input of the eighth element OR 33. Then the signal just as in the previous one, we restrict the output of the eighth element - OR 33; to the single input of the fifth trigger 9, which locks the thirteenth element AND 24, terminating the additional signal and the participation of the seventh trigger 11 in the further operation of the device.

When changes in the direction of movement of the object, the sensors are triggered in an inconsistent manner, and two responses of the same sensor (or several operations,

0

five

follows case

0

five

Q if the object makes a fluctuating e

movement in an area not exceeding two movement Discrete Disks), but as noted earlier, when the signal is repeatedly repeated from the 5 outputs of the same sensor, the signal at the output of one of the three elements And 18, 19, 20, open and connected associated with this sensor. The signal from the output of this element And through the seventh element 32 1SHI will go to the first input of the eleventh 22 and twelfth 23 elements I. One of these two elements is open, namely, the third input of which receives a single signal from one of the outputs of the fourth trigger 8 .

The state of the fourth trigger 8. will be determined by the direction of movement of the object 35 at the previous

0

five

2 (X) or with the initial elements And 15, 16 and 17, implementing a logical function F ,.

If, after turning on the device and the first actuation of the sensor, the direction of movement of the object 35 changes, then this sensor will be repeated (even) and the signal from it will pass through the circuit: one of three

1, then from the second

la from the second 2 (Xj), and then from the third 3 (Xj) or first from the third. 3 (Xj),. A following from the first 1 (X.), then object 35 moves in one direction. If the signals arrive in reverse order, then object 35 moves in the opposite direction. And elements 18, 19 and 40, element OR Logic functions FX, X VXjXjVXX 32, the seventh trigger 11, will trigger cf and F2 XX VX X2 VX2 X will write all initiating trigger 11 and the appearance of a single signal on its inverse output. In this connection, the inverse highlight-) 5th move of the seventh trigger 11 - the second input of the fourteenth element I 25 is opened the last.

Possible options for following the sensor signals when the object 35 moves in each of the directions. At the same time, the successive writing of signal designations in each of the pairs of elements of the logical functions F and F corresponds to the order of arrival of signals from the sensors. At the output of the third element OR 26, the logical function F is implemented, and at the output of the second element OR 27 - the logical function F. Accordingly, at the output of the first 12,

the second 13 and third 14 elements –– and 25 ° direct output.

elements of the logic function are realized. Even operation of the seventh trigger 11 indicates that by the end of the formation of the first element from the beginning of the device operation

FJ:,. and "and the output of the fourth 15, p that 16 and sixth 17 elements And - the elements of the logical function,; and xjx.

The reversible counter 34 performs the algebraic summation of the signals from the output of the signal analysis unit 4 and the corresponding elements of the logical functions F and F ,,.

When one of the sensors 1,2 and 3 is triggered, the signal from its output, having passed through the corresponding one of the three open elements AND 18.19 and 20, to the one of the first three types of the seventh element OR 32 and from the output of the last to the counting input of the seventh trigger 11, leading to its triggering, as a result of KOTOpoi o, a single signal appears at the direct output of the seventh trigger 11 and opens the thirteenth element AND 24. The signal from the output of the seventh element OR 32 through the eleventh 22 or twelfth 23 elements And does not pass through that these items Closing the due to the zero signal on the forward vkode fifth latch 9. Simultaneously, one of the triggers

35

40

The .JQ of the logic function F or F of the object 35 will be located at a distance less than one movement increment from the position it occupied at the time of the start of the measurements.

The odd triggering of the seventh trigger 11 indicates that by the end of the formation of the first element from the beginning of the operation of the device element of the logical function F or F, object 35 will be at a distance greater than one discrete displacement from the position it occupied at the moment of the start of measurements. The displacement displacement, which corresponds to the position of the object at the moment of the beginning of measurements, is taken as the origin of the displacement. Therefore, in the case when after the first sequential operation of the two sensors the object 35 is located from the initial position at a distance greater than one movement sample (which corresponds to the odd operation of the seventh trigger 11), an additional signal is generated in the device.

45

50

flip-flops 5, 6 and 7, which, with its help, which is also entered into the reverse direct output, opens one of the three ° counter 34, after which it will

the number two is written (the movement of the object occurred on two discretes of the And 12, 13, and 1.4 elements that implement the logic function F, and one of the three

one

elements And 15, 16 and 17, implementing a logical function F ,.

If, after turning on the device and the first response of the sensor, the direction of movement of the object 35 changes, then the sensor will respond again (even) and the signal from it passes through the circuit: one of three

elements AND 18, 19 and 40, element OR 32, the seventh trigger 11, will trigger the right elements; And 18, 19 and 40, element OR 32, the seventh trigger 11, will trigger the

the trigger 11 is runaway and the appearance of a single signal is at its inverse output. In this case, the inverse output of the seventh trigger 11 is the second input of the fourteenth element AND 25 is opened last.

Obviously, after re-changing the direction of movement of the object and the subsequent (odd) triggering of the same sensor, the signal from it will pass through the specified circuit and will trigger the seventh trigger 1 1 and the appearance of a single signal

the logical function F or F, the object 35 will be located at a distance less than one movement increment from the position it occupied at the time of the beginning of the measurements.

The odd triggering of the seventh trigger 11 indicates that by the end of the formation of the first element from the beginning of the operation of the device element of the logical function F or F, object 35 will be at a distance greater than one discrete displacement from the position it occupied at the moment of the start of measurements. The displacement displacement, which corresponds to the position of the object at the moment of the beginning of measurements, is taken as the origin of the displacement. Therefore, in the case when after the first sequential operation of the two sensors the object 35 is located from the initial position at a distance greater than one movement sample (which corresponds to the odd operation of the seventh trigger 11), an additional signal is generated in the device.

sensor response (depending on the direction of movement on the first output there will be a single or zero signal). From the eleventh eleventh 22 (or twelfth 23) element And the signal will go to the fourth input of the first 26 (or second 27) element OR Next, the signal will go through the sixth

em in the zone, i.e. shift by two increments of movement relative to the origin. After the second sensor 2 is triggered, the device will implement the element of the logic function F X, X and in the reversible counter 34

unit will be written, however, if there is a single signal on the direct element OR 31, the counting input will reverse the output of the seventh flip-flop 11

sive counter 34, as well as to the input of the fourth trigger 8, leading to its triggering, as a result of which a unit with the sign opposite to the unit sign, previously recorded in the reversible counter 34, will be entered into the reversible counter.

Therefore, each time the same sensor is repeated, indicating a change in the direction of movement, the unit will be added (subtracted) in the reversible counter 34 if before it the unit has been subtracted (added).

Thus, by taking into account each sensor operation, the device determines the displacement of the displacement, which corresponds to the current position of the object relative to its initial position

Consider an example of the movement of the object 35 and the corresponding readings of the reversing sensor 34 corresponding to this movement.

Let at the time of the start of measurement the object 35 is in such a position that the first readable label is located in the interval at which the first or third sensor can be triggered (depending on which direction the object will move), i.e. the object will be in zone xx (displacement increments defining the origin). And let the transition occur in such a direction that the first sensor 1 triggers first (the object will then move to the zone X Xj, i.e. will move one movement increment). After the first sensor 1 triggers, a single signal is established at the forward output of the seventh trigger 11 and preparation for the implementation of the element of the logical function X, Xj (or X, xp takes place. If object 35 continues to move, not changing the direction of movement, then after the second sensor 2 triggers hit15

thirty

35

40

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50

an additional signal has been generated that will ensure the recording of one more unit in the reversible counter 34. As a result, the object 35 will move two displacements and the number two will be written in the reversing counter.

Claims (1)

Invention Formula 20 A device for measuring linear and angular movements, comprising three sensors, a reversible counter, a signal sequence analysis unit, 25 including four flip-flops, six AND elements, six OR elements, the output of the first sensor is connected to a single input of the first trigger, the first inputs of the first and fifth elements are AND, the output of the second sensor is connected to a single input of the second trigger, the first inputs of the second and sixth elements, the third sensor output is connected to a single the input of the third trigger, the first inputs of the third and fourth elements And, the direct output of the first trigger connected to the second inputs of the second and fourth elements And, the direct output of the second trigger connected to the second inputs of the third of the first and the sixth elements And, the outputs of the first, second, third elements And are connected respectively to the first, second, third inputs of the first element OR and to the first inputs of the fifth, third and the fourth element OR, the outputs of the fourth, fifth, sixth elements AND are connected respectively to the first, second, third inputs of the second OR element and to the second inputs of the third, fourth, fifth OR elements, the outputs of which are connected respectively to the zero inputs of the first, second, third triggers, the outputs of the first and second elements of the NL are connected respectively to the unit and zero 55 em in the zone, i.e. shift by two increments of movement relative to the origin. After the second sensor 2 is triggered, the device will implement the element of the logic function F X, X and in the reversible counter 34 an additional signal has been generated that will ensure the recording of one more unit in the reversible counter 34. As a result, the object 35 will be moved two displacements and the number two will be written in the reversing counter. Invention Formula 20 0 five 0 five 0 A device for measuring linear and angular movements, comprising three sensors, a reversible counter, a signal sequence analysis unit, 5 including four flip-flops, six AND elements, six OR elements, the output of the first sensor is connected to a single input of the first trigger, the first inputs of the first and fifth elements are AND, the output of the second sensor is connected to a single input of the second trigger, the first inputs of the second and sixth elements, the third sensor output is connected to a single the input of the third trigger, the first inputs of the third and fourth elements And, the direct output of the first trigger connected to the second inputs of the second and fourth elements And, the direct output of the second trigger connected to the second inputs of the third of the first and the sixth elements And, the outputs of the first, second, third elements And are connected respectively to the first, second, third inputs of the first element OR and to the first inputs of the fifth, third and the fourth element OR, the outputs of the fourth, fifth, sixth elements AND are connected respectively to the first, second, third inputs of the second OR element and to the second inputs of the third, fourth, fifth OR elements, the outputs of which are connected respectively to the zero inputs of the first, second, third triggers, the outputs of the first and second elements of the NL are connected respectively to the unit and zero five the fourth trigger and the first and second inputs of the sixth OR element, the fourth output of the fourth trigger is connected to the control inputs of the reversible counter, the counting input, which is connected to the output of the sixth OR element, the third inputs of the third, fourth, or fifth elements OR are connected with a tire of a different setting, so that, in order to improve measurement accuracy, three triggers are introduced into it, eight AND elements, two OR elements and a delay line, the inverse output i epBoro of the trigger is connected to the first moves of the seventh and nine In addition, the inverse output of the second trigger is connected to the second input of the seventh and C the first input of the eighth element And, the inverse output of the third trigger is connected to the second input of the eighth and ninth elements And, the outputs of the first, second, third sensors are connected to the third inputs of the eighth, ninth and seventh elements AND, the outputs of which are connected to the yen respectively with the first, second, third inputs of the seventh element OR, the output of which is connected to. the first entrances of the eleventh and twelfth elements. Both with the counting input of the seventh trigger, the direct output of which is connected to the third input of the thirteenth and with the second input of the dec. Compiler K. Tavlinov Editor M. Andrushenko Tehred L. Serdyukova. Corrector 0. Kundrik Order 660/36 Circulation 683 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 In addition, the output of the latter is connected to the fourth input of the seventh OR element, the inverse output of the seventh trigger is connected to the second input of the fourteenth AND element, the output of which is connected to the first input of the eighth OR element, whose output is connected to the single input of the fifth trigger, the direct output of which is connected to the second inputs of the eleventh and twelfth elements AND, the outputs of which are connected respectively to the fourth inputs of the first and the second element OR, the direct and inverse outputs of the fourth trigger are connected respectively to the third inputs of the twelfth and eleventh elements AND, the output of the sixth element OR is connected to the first input of the fourteenth element AND and the single input of the sixth trigger, the inverse output of which is connected to the second input of the thirteenth element AND, the inverse the output of the fifth trigger is connected to the first input of the thirteenth AND element, the output of which is connected to the third output of the sixth OR element and the input of the delay line, the output of which connected to the second input of the eighth element OR, the first input of the tenth element AND, zero inputs of the fifth and sixth flip-flops, the zero input of the reversible counter connected to 35 bus initial installation. 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