SU1170615A1 - Displacement encoder - Google Patents

Abstract

1. A MOVIE CONVERTER TO A CODE containing a radiator, collimator, analyzer, lens and photodetector successively placed on the optical axis, the output of which is connected to the first input of the output code generation unit, an engine kinematically connected with the shaft to an extender, characterized in that, in order to expand the functional transformer capabilities, a variable-voltage driver, a voltage-code converter, an initial setup driver, and a mechanical analyzer It is connected to the control input of the variable voltage generator, the output of which is connected to the first input of the voltage-code converter, the second input of which is connected to the output of the photodetector, and the output to the second input of the output code generation unit, the third input of which is connected to the output of the initial setting generator The fourth input is the start input, and the first and second outputs are the outputs of the converter. 2. The converter according to claim 1, wherein the output code generation unit comprises the first and second elements I, a trigger, the first and second counters, a decoder, the first, second, third, fourth and the fifth registers, the first, second and third blocks of code subtraction, the first and second division blocks of the CODES, the first inputs of the first element AND and the first counter are combined and are the third input, the second input of the first element (L and I is the start input of with and the output is connected to the first input of the trigger, the output of which is connected to p The first input of the second element is And, the second input of which is connected to the second input of the first counter and is the first input of the block, the output of the second element I is connected to the input of the second counter, the first output of which is connected to the second trigger input connected to the input of the decryption controller, the first, second and third outputs of which are connected to the first inputs of the first, second and third registers, respectively, the outputs of the first counter are connected to the first inputs of the fourth and fifth registers, the second inputs of the first, second o, third, fourth and fifth registers are combined and the second input unit, the first register output connected to a first input of the first subtractor .bloka code, the second register output connected to a first input of the second

Description

the code reading unit, the output of the third register is connected to the first input of the third and second input of the first code reading unit, the outputs of the fourth and fifth registers are connected to the second inputs of the second and third code reading unit, respectively, the output of the first code reading unit is connected to the first inputs of the first and second dividing units, the TOTS of which are connected to the outputs of the second and third blocks respectively, the subtraction of the codes, the output {.1 of the division units of the codes are the outputs of the block.

3. The converter according to claim 1, characterized in that the variable voltage driver has a potentiometer and a resistance-voltage converter, the first input of the potentiometer is connected to the first input of the resistance converter, and the second output of the potentiometer is connected to the second input of the converter resistance-voltage, the output of which is the output of the former, the slider of the potentiometer is the control input of the former.

The invention relates to automation and computing and may. be used, in particular, for the operational control of welding movements and deformations of a wide class of products during the welding process.

The aim of the invention is to enhance the functionality of a motion to code converter.

Fig. 1 shows a block diagram of a converter, Fig. 2 shows a block diagram of an output code generation unit, Fig. 3 shows a timing diagram of the operation of converter i in Fig. 4, the analyzer is executed.

The displacement transducer in the code contains the emitter 1, the collimator 2, the analyzer 3, the lens 4, the photodetector 5, the engine 6, the output code generation unit 7, the imaging unit 8 and the alternating voltage w, consisting of a potentiometer 9 and a resistive-voltage transducer 10, the voltage-to-code converter 11, the initial setting driver 12, the output code fbrmirovanie unit 7 contains an AND 13 element, a trigger 14, and counters. 15 and 16, a decoder 17, registers 1822, blocks 23-25 of code subtraction, blocks 26 and 27 of dividing codes, element I, 28.

The emitter 1 with the collimator 2 mounted on it is fixed on the fixed snap-in, the analyzer 3, the lens 4 and the photoreceiver 5 are mounted on the object at a controlled point, and the photodetector 5 is installed in the focus of the lens 4, the engine 6 drives the analyzer 3, the potentiometer 9 is mechanically connected to the analyzer 3 and connected to the converter 10 resistance-voltage, whose current is connected to the voltage-code converter 11, block 7 is also connected to the voltage-code converter 11 to which the form is connected 12 irovatel initial setup, the photodetector 5 is connected to inverter 11 voltage code at the unit 7 is supplied -Start signal and its outputs are outputs and N Ny transducer.

. The converter works as follows.

Engine 6 drives analyzer 3, made in the form of an opaque mask 29 with an I-shaped slit 30 (Fig. 4) or with three peaks 30.1-30.3. Analyzer 3 performs a reciprocating motion in a plane perpendicular to the direction of propagation of the beam of the emitter 1, for which a helium-neon laser can be used. Mechanical analyzer 3

associated with the engine potentiometer 9, a complete rotation of which corresponds to the movement of the analyzer 3 in one direction. When the analyzer reaches the end position 3, the shaper 12 of the initial set: t condition is triggered and a pulse TC is generated (Fig. 3) arriving at block 7. 3117 When crossing the slits 30-2-30-3 of the laser beam analyzer 3, the photodetector 5 and produces a signal T (p), a voltage-code input to block 1 and a triggering converter 11. As an converter 19., an operational amplifier can be used, the input of which is supplied by a reference voltage, and a potentiometer 9 is turned on to the feedback photodetection moment ka 5 converts the resistance value k1 of potentiometer 9: to code N, voltage-code converter 11. As an example, an integrated microcircuit 572IIB1 can be used as the Start signal to the input of block 7 at the moment of arrival of pulse T From the phaser 12 of the initial installation, through the element H 28, the trigger 14 is installed (Fig. 2). The counters 15 and 16 match the pulses received from the transducer 5 when crossing the slots 30-1-30-3 of the beam analyzer 3. Upon the arrival of the third pulse Tf, i) from the AND unit 13 (Fig. 3), the counter 15 is zeroed and is triggered. trigger 14. On the front of the front of the pulse T, ..., T23 T, the outputs of the decoder 17 (FIG. Ze, g,) write the Nj code from the output of the voltage-to-voltage converter 10 to the registers 20, 21, and 22, respectively. Counter 16 is zeroed with pulse T and third pulse T pp. On the leading edges of the pulses TJ and T- (Fig.38.5) corresponding to the arrival of the first two pulses in the counter 16, a code is recorded. N, j in registers 18 and 19, respectively. The measurement cycle T corresponds to the time between two consecutive pulses Tzu Counter 15 operates only in the first cycle, starting with the start signal by block 7. In the second and subsequent cycles, the code is written to registers 18 and 19. Suppose that analyzer 3 moves to the right and the initial position of the beam of radiator 1 in the plane of analyzer 3 is point A (, (Fig. 4). When the beam crosses, the slit 30- 1, the voltage-code converter 11 is started up and the recipient code P at its output (154 where Kj is the conversion coefficient of potentiometer 9y Kjj, is the conversion ratio of converter 10. This code is stored in register 20. Similarly, at the moment of beam crossing by the slit 30-2 in register 21, remember the code, and and the intersection of the beam by the slit 30-3, the code is stored in register 22. By knowing the values of these codes, the coefficient and transformations of the lottery meter-8 jSfi NH -N can be determined. "Where X is the distance between two ver ™ X. l. ticking C. 30-1 and 30-N analyzers 3. Since the slit 30-2 is inclined to the slots 30-1 and 30-3 at an angle Cj 45, the change in the Y coordinate of the laser beam on the analyzer plane 3 is equal to the change in the X coordinate (tg () Therefore, the code N .. pa the output of preobrazovatel 11 for example, the 1-stash code in the intersection slot 30-1 of the intersection coordinate X, and is the point of intersection of integer 30-2 - Coordinate Y, Therefore, the coordinates and Yj, - the origin can be determined by the formulas XJ, Q: N, Y, (N, In the subsequent measurement cycles, the coordinates of the position of the ray L are determined relative to the origin as Xi (N, -N, ,) (N2-N ,,). Therefore, in the transducer there is no error in setting it to the initial position, since a differential measurement method is used. Depending on the nature of the welds being measured, the initial installation of the converter can be done either at the middle of the range or at its edge. Equalizing the transformation in this case, you can sippsat in the form of X- "WL) ,. (Nm-n ,,,). Y- -4 jl5zl iiL (N, H -N, H)

Blocks 23-27, which are part of block 7, implement the algorithm specified in the system of equations (1).

Block 7 can be assembled on 155 series chips, K58TIK2 chip can be used as blocks 23, 24 and 25, and K58TIK coding chip is used as blocks 26 and 27.

At the outputs of the converter in each measurement cycle, the TC is obtained

M

N,

 according to ravi

codes

Have

N - .N, 3Ni.K. , N,

XT N. -NZH.

fj j,

L 1 N, -N, H By multiplying these codes by the normalization factor Xj, you can get the real values of the coordinates of the controlled point A of the welded object, i.e. welding movements. The measuring range of the transducer depends only on the distance and can be selected based on specific applications. Maximum range - measurement is limited by the physical dimensions of the lens 4.

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Fig, 1

Claims (3)

1. A TRANSFER OF MOVEMENT TO A CODE containing a radiator, a collimator, an analyzer, a lens and a photodetector sequentially placed on the optical axis, the output of which is connected to the first input of the output code generating unit, a motor kinematically connected by a shaft to the analyzer, characterized in that, for the purpose of expanding the functionality of the converter, a shaper of varying voltage, a voltage-code converter, a shaper of the initial installation are introduced into it, while the analyzer is mechanically connected with the control input of the variable voltage driver, the output of which is connected to the first input of the voltage-code converter, the second input of which is connected to the output of the photodetector, and the output - with the second input of the output code generating unit, the third input of which is connected to the output of the initial setup driver, the fourth input is trigger input, and the first and second outputs of it are the outputs of the Converter. 2. The Converter according to claim 1, characterized in that the block for generating the output code contains the first and second elements AND, the trigger, the first and second counters, the decoder, the first, second, third, fourth and fifth registers, the first, second and third blocks of subtraction codes, the first and second dividing blocks • codes, wherein the first inputs of the first element of the first counter Ii obe- dineny and _a third input is' ® unit, the second input of the first aND gate is the input of the trigger block, and an output coupled to the first input of the flip-flop, whose output connected to the first in the second element And, the second input of which is connected to the second input of the first counter and is the first input of the block, the output of the second element And is connected to the input of the second counter, the first output of which is connected to the second input of the trigger, and the second output is connected to the input of the decoder, the first, second and the third outputs of which are connected to the first inputs of the first, second and third registers, respectively, the outputs of the first counter are connected to the first inputs of the fourth and fifth registers, the second inputs of the first, second, third, fourth and fifth registers are combined and are the second input of the block, the output of the first register is connected to the first input of the first block of subtraction of codes, the output of the second register is connected to the first input of the second SU,., 1170615 block of subtraction of codes, the output of the third register is connected to the first input of the third and second input of the first block of subtraction of codes, the outputs of the fourth and fifth registers are connected to the second inputs of the second and third blocks of subtraction of codes, respectively, the output of the first block of subtraction of codes is connected to the first the inputs of the first and second blocks of code division, the second inputs of which are connected to the outputs of the second and third blocks, respectively, subtracting codes, the outputs of the code division blocks are the outputs of the block. 3. The converter according to claim 1, characterized in that the variable voltage generator comprises a potentiometer and a resistance-voltage converter, the first input of the potentiometer is connected to the first input of the voltage-resistance converter and with its first output, the second output of the potentiometer is connected to the second input of the resistance-voltage converter, the output of which is the output of the driver, the potentiometer engine is the control input of the driver.