SU1605309A1 - Displacement digitizer - Google Patents

Description

(|) The signal distributor is connected to the first inputs of the first and third counters, the codes of the first and third, second and fourth trig: 7erovs connect the yen to the cervic and second inputs of the first and second elements. Commodity 2 AND- OR, respectively, the first and second outputs of the generator are connected. respectively, with the third and quarter entrances of the first and second elements of 2, respectively, and with the inputs of the OR element, the output of which is connected to the second input of the first count ™ tick, the outputs of the first and second

cops 2 are connected to the second (inputs of the second and third counters, respectively, the first inputs of the firstj of the second and third counters are combined .. 2 "Pre, the educator in n, 1, t -

The fact that the selective pulse pulse contains two inverters, two triggers and two elements AND, the input. The first inverter is the first selector 13, and the output of the first inverter is connected to. first entry lane about 5

0

3094

The second trigger, the second input of which is connected to the zero potential bus, the first input of the second trigger is connected to the first inputs of the first and second elements AND and is the second input of the selector, the second input of the second trigger is connected to the output of the first trigger, and the output is connected to the second input of the first element And, the output of which is connected to the input of the Second inverter. And is the second output of the selector, the output of the second inverter is connected to the second input of the second element And to the third input of the first trigger, the output of the second element I is mc first selector entry.

3, the Converter according to claim 1,. This means that the pulse shaper Contains the emitter, diaphragm and Ф6- successively located on the same optical axis, a diaphragm and f6-: a receiving element, the output of which is the output of the pulse shaper, and the distance between the emitter and the diaphragm is larger than the analyzer thickness.

This invention relates to automation and. computer technology and can be used in welding production in the control of welding movements and deformations of products during their welding. The aim of the invention is to improve the accuracy of the converter.

FIG. 1 shows a block diagram of a converter 5 in FIG. 2; a analyzer; 3 is an electrical diagram of a pulse selector; 4 shows time diagrams of the converter operation.

The transducer contains emitter 1, collimator.tor 2, analyzer 3, lens 4, photodetector 5, formulated. tele- 6 pulses, motor 7, driver 8-13 signals, registers 14-16, dividers 17 and 18 codes, counters 19-21, selector 22 pulses, trigger. 13-26, generator 27, element OR 28, elements 2И-Ш1И 29 and 30, driver & contains a radiator-spruce 31, a photodetector 32 and a diaphragm 33, the analyzo contains transparent windows 34. and 35, a transparent window-34 has a response zone 36 of the driver 6, the analyzer 3 has a measurement zone 37, an axis hole 38, the pulse selector 22 contains an inverter, 39, triggers 40 and 41, elements And 42 and 43, inverter 44, on

The time diagrams show signals 45 from the output of the imaging unit 6, 46 - .. from the output of the photodetector 5, 47 - from the second output of the selector 22 pulses G 48 - from the first output of the selector 22 pulses, 49 and 50 - from the outputs of the flip-flops 25 and 26, respectively, 51 and 52- from the outputs of trigger 23 and 24,

The converter works in the following way.

The emitter 1, which can be used as a helium-neon laser with a collimator 2 fixed on it, is mounted on a fixed base. The analyzer 3 and its associated lens 4, the photodetector 5, the driver 6 and the engine 7 are fixed on the object to be monitored. Once a full revolution of the analyzer 3, the transparent window 34 and window 35 open the way for this flow of radiator 1 to the photodetector 5, the output of which produces pulses 46. At this window 34 is simultaneously the zone 36 of the response of the former 6, which opens the path for the light flux from the emitter, 31 to the photodetector 32 jepes diaphragm 33. At the output of the imaging unit 6, a pulse 45 is activated. With the help of the selector 19, pulses 48 and 47

the intersection of the beam emitter 1 windows 34 and 35.

One of the implementations of the selector 19 is shown in FIG. Upon arrival polo (

c, accuracy is limited only by the size of the diaphragm 33.

Let the effective spot radius of

radar I in the plane of the analyzer 3 |

pulse front 45, the post is equal to r and the spot is located at the point O. of the feed through the inverter 39 to the input of the usable signal. Under the effective spot radius of the trigger 40, the latter is set to one. This permits the recording of information in; trigger 41. The positive front of the pulse 47, which follows the pulse 45 (it is assumed that the analyzer 3 in Fig. 2 is clockwise, the maximum distance from the center of the spot to the point, the intensity

ten

the emitter in which is equal to the threshold of the photodio1-chic 5. The rotation of the spot of the emitter I around the center O of the analyzer 3 (which is equivalent to the rotation of the analyzer 3 around its axis),

Ke, and the beam izlz Chatel 1 can find-- the photodetector 5 produces pulses

with zone only. 37), sets the trigger 41 to a single state, thereby ensuring its passage to the output of the selector 22 through the element 47, and 48. Let 0 be the center of the spot when it goes beyond the border of ok at 34; 0 ;; - center of the spot at the entrance of the egs to the transparent window 34j center n

ment And 43 to blocks J2 and-13. Simultaneously 20 on entering it in a transparent window

thirty

This same pulse through the inverter 44 is fed to the gate input of the trigger 40 and resets its negative (back) front to zero. Thus, signal 47 is generated. 25 When resetting trigger 40, trigger 41 is reset and pulses at the output of selector 22 are blocked through AND 43, however, pulses 48 are allowed to pass through AND 42 to Former 8 and 9. At the arrival of the next pulse 45, the process described is repeated. Thus, the selector 22 of the input signal 46 is divided into two signals 47 and 48. This separation is possible, since the sequence of the passage of the pulses 45 and 46 does not change.

40

45

Analyzer 3 is a disk made of an optically transparent material, for example glass, with an opaque mask coated on it with transparent windows 34 and 35 (Fig. 2). In the center of the disk there is a hole 38 under the axis on which it rotates. The analyzer 3 is driven by the motor 7. The transparent window 34 is formed by phase-shifted C radial direct OD and OS, and a transparent window 35 is formed phase-shifted by angle) e.: Archimedean left-handed spirals turned radially (Cfg). The diaphragm 33, mounted in front of the radiator 32 s of the former 6, 55, allows the pulse 45 to be selected, the duration of which with great accuracy is proportional to the phase shift angle

50

35, - 0 - the center of the spot when exiting the transparent window 35. Moreover, the point M is the point of tangency of the spot with the center O and the OAE spiral, N is the point of tangency of the spot with the center of Oj and the OBE spiral, DJc are the points of tangency of the spot centers 0 and 0 With the borders of the transparent window 34, In the ideal case, when the spot of the radiator 1 in the plane of the analyzer 3 stretches to the point (), the points of intersection of the spot and the transparent window

34 are points C and D, and the points of intersection of the spot and the transparent window

35 are points A and B. Moreover, points A, B, C and D lie on a circle of radius p (p is the polar coordinate of point O). The polar coordinate (J) of point O is determined by the angle between the position of the OD boundary of the transparent window 34 and at the moment when the imaging unit 6 is turned off (the rear edge of the pulse 45) and the radius vector 00. Spiral equation Archime

R ,

Gder, C) - point coordinates

Archimedes spirals; a is a constant coefficient

  R

The value of the angle (is chosen to be equal, rad. Based on the foregoing, it is possible to write

yes in polar coordinates is

op CO (p / a + M z + t P

t T

s SO (4 o

2tFi)

where Lfi is 1, ..OjOB; Lf, 0, OD if 64.OS, and Cf, C, (p) Var .. Vj. (p) Var, tfg const.

Accuracy is limited only by the size equal to r and is clearly located at point O. By the effective spot radius is understood the maximum distance from the center of the spot to the point, the intensity

is equal to r and the spot is at the point O. Under the effective radius of the spot pony

the emitter in which is equal to the threshold of the photodio1-chic 5. The rotation of the spot of the emitter I around the center O of the analyzer 3 (which is equivalent to the rotation of the analyzer 3 around its axis),

photodetector 5 produces pulses

photodetector 5 produces pulses

47, and 48. Let 0 be the center of the spot when it goes beyond the boundary of a transparent ca at 34; 0 ;; - center of the spot at the entrance of the egs to the transparent window 34j center n

on when entering it into a transparent window

thirty

25

0

five

0

35, - 0 - the center of the spot when exiting the transparent window 35. Moreover, the point M is the point of tangency of the spot with the center O and the OAE spiral, N is the point of tangency of the spot with the center of Oj and the OBE spiral, DJc are the points of tangency of the spot centers 0 and 0 With the borders of the transparent window 34, In the ideal case, when the spot of the radiator 1 in the plane of the analyzer 3 stretches to the point (), the points of intersection of the spot and the transparent window

34 are points C and D, and the points of intersection of the spot and the transparent window

35 are points A and B. Moreover, points A, B, C and D lie on a circle of radius p (p is the polar coordinate of point O). The polar coordinate (J) of point O is determined by the angle between the position of the OD boundary of the transparent window 34 and at the moment when the imaging unit 6 is turned off (the rear edge of the pulse 45) and the radius vector 00. Spiral equation Archime

R ,

Gder, C) - point coordinates

Archimedes spirals; a is a constant coefficient

  R

The value of the angle (is chosen to be equal, rad. Based on the foregoing, it is possible to write

yes in polar coordinates is

op CO (p / a + M z + t P

t T

s SO (4 o

2tFi)

where Lfi is 1, ..OjOB; Lf, 0, OD if 64.OS, and Cf, C, (p) Var .. Vj. (p) Var, tfg const.

It follows from FIG. 2 that in the ideal case () the duration Tl of the pulse 49 formed between the leading edges of the pulses 47 and 48, nponopUH is the polar coordinate O of the point O. The same coordinate is proportional to the duration Tl of the pulse 50 between the falling edges of the pulses 47 and 48. Similarly, the polar coordinate (about the point O is proportional to the durations T ,,, T (pulses 51 and 52. formed by the front (rear) edges of the pulses 48 and 45. These pulses are generated using shapers and triggers 23-26, and expressions for the durations of the generated impulses will ...

(4 pi-yr i) ,. p (H p + H h-M.),

tt pcCoCtpcf tM-,), 5 (} - (,), L where CH p “Use the angles proportional to the polar coordinates p, (points O, respectively. With the help of generator 27, the output of which forms two). shifted by and relative to each other, the sequence of them-, frequencies with frequency f, and the elements 28- 30 on the counters 19-21 in one revolution of the analyzer 3 the values of the codes are formed:.

N ,,. .

N, j o;

Thebes 1

. N, j ((p, -q),) cofo.

On the leading edge of the pulse 45, a census, codes N {, and N.j to registers 14–16, and then zeroing counters 19–21, and a new cycle of converter operation begins. In this case, the codes LP and NP at the output of dividers 17 and 18 are determined from the expressions

s -

HF.

t

„N, 3 M p -Cb-tfiL

P N7 2 TiT The polar coordinates of the point O are made from the expressions

, /

ode

Cf Lfc 2 irNi, p a (f

R

 - aCtfj-), u, p a ((p2),...

where ln is the methodical error of determining the coordinate. Thus, by multiplying the values of the codes N (j, Nn by constant coefficients 27 and Ta, respectively, it is possible to obtain polar coordinates L and (center of the spot O. Emitter 1 in the analyzer plane. 3. At the necessary - you can easily go to the Cartesian coordinates by the formulas X pcosl |;

X p sinlf.

35

1.2

J7

J "

to Zlokan 8.3 TS

Klakan 22,23

.J.

FIG.

Claims (2)

1. TRANSFER OF TRANSFER TO THE CODE, comprising an emitter optically connected through a collimator, an analyzer and a lens with a photodetector, a motor kinematically connected to the analyzer, a pulse shaper, first and second signal shapers whose inputs are combined, the output of the first signal shaper is connected to the first input of the first trigger, first and second counters, first and second registers, the first inputs of which are connected to the second input of the first trigger, the output of the first counter is connected to the second input of the first regis RA, the output of which is connected to the first inputs of the first and second code dividers, the output of the second counter is connected to the second input of the second register, the output of which is connected to the second input of the first code divider, the output of which is the first output of the converter, the third counter and register, the first inputs of which combined, the output of the third counter is connected to the second input of the third register, the output of which is the first output of the converter, the third counter and register, the first inputs of which are combined, the output of the third counter is connected with the second input of the third register, the output of which is connected to the second input of the second code divider, the output of which is second ^. With the output of the converter, the generator, the analyzer is made with the main transparent window, one side of which is made in the form of an Archimedes spiral, characterized in that, in order to increase the accuracy of the converter, a pulse selector, a third, fourth, fifth and sixth shapers are introduced into it signals, second, third and fourth triggers, element. OR, the first and second elements 2 AND-OR, the analyzer is made with an additional _Q transparent window in the form of a sector with an angle of ® Cf ₀ solution, the other side of the main transparent window is made in the form of an Archimedes spiral that is equidistant to one side, and the Archimedes spiral is deployed an angle 2 ' «- (|> _o, output PFN is connected to the inputs of the third and fourth signal generators and to the first input ¹ of the selector momentum pulses, the second input of which soedi-: nen vyhodom- with the photodetector, the first pulse output connected to selector entrance first of the signal driver: catch, and the second output with the inputs of the fifth and sixth signal conditioners, the output of the first signal conditioner is connected to the first input of the second trigger, the output of the second signal conditioner is connected to the first inputs of the third and fourth triggers, outputs of the third, fourth, fifth and sixth signal conditioners are connected to the second inputs of the first, third, second and fourth triggers, respectively, the output of the third Tv 6ov <iO9r 'Tis of the signal shaper is connected to the first inputs of the first and third counters, the outputs of the first and third, second and fourth triggers are connected respectively to the first and second inputs of the first and second element ·, item 2 AND-OR, respectively, the first and second outputs of the generator are connected. respectively, with the third and fourth iq inputs of the first and second AND-OR elements 2, respectively, and with the inputs of the OR element, the output of which is connected to the second input of the first counter, the outputs of the first and second ele- ment are 15 AND-OR 2 elements are connected to the second I inputs of the second and third counters, respectively, the first inputs of the first; second and third counters combined. 20 2. The converter poi.1, characterized in that the pulse selector contains two inverters, two triggers and two elements And, the input. the first inverter is the first care of the selector, and the output of the first in—; Vertor connected to. first input per — V