SU1437998A1 - Converter of linear displacement speed - Google Patents

Description

(21) 4033794 / 24-24; 4062327 / 24-24; 4062328 / 24-24; 4062406 / 24-24

(22) 03/04/86

(46) 15.11. 88. Bull. 42 (75) S.B. Demin

(53) 681.325 (088.8)

(56) USSR author's certificate 1070483, cl. G 01 P 5/00, 1984.

USSR Author's Certificate No. 568022, cl. G 01 P 5/00, 1977.

(54) LINEAR MOVE VARIABLES CONVERTER

(57) The invention relates to auto matic and computer technology and can be used to measure and control the speed of linear movement. The aim of the invention is to extend the functionality

and increasing the accuracy of the converter. To do this, a linear displacement transducer containing a speed sensor, a pulse shaper, a scanner, a first block of counters, a computing unit, a pulse generator, a block of AND elements, two amplifiers — a former, three OR elements, two T-flip-flops, a second block of AND elements , second counter block, two code-to-converter, two registers, control trigger, control block, analysis block. This goal is achieved due to the fact that the pulse generator is made multi-phase and forms pulses at its outputs that are shifted in time by a part of the follow-up period. From each output, the pulses are summed by a corresponding counter of meter blocks. The codes at the outputs of the meter blocks are summed up among themselves, and as a result, higher-resolution codes are obtained that are processed appropriately and the output code of the converter is obtained. 3 hp f-ly, 5 ill.

(ABOUT

1 (L

four;:

oo

The invention relates to automation and computing and can be used to measure and control the speed of a linear displacement.

The aim of the invention is to enhance the functionality and increase the accuracy of the converter.

Figure 1 is a schematic diagram of the proposed linear velocity converter; Fig. 2 is a diagram of a linear displacement speed converter with other embodiments of the computation block; Fig. 5 is a timing diagram for explaining the operation of the converter.

The linear displacement transducer contains a speed sensor 1 consisting, in the first embodiment, of a magnetostrictive sound guide 2, acoustic absorbers 3 of the tension stabilizer 4, interrogation element 5 and readout elements b and 7, voltage-current converter 8, amplifiers-formers 9 and 10 , and shaper 11 polling pulses, amplifiers-Shaper 12 and 13, elements OR 14 and 15, T-flip-flops 16 and 17 element OR 38, multi-phase generator 19 pulses, blocks 20 and 21 elements And blocks 22 and 23 counters, converters 24 and 25 code - code, b calculation block 26, register 27I pulse generator 28, delay element 29, analysis block 30, register 31, control block 32, control trigger 33, query bus 34, input bus 35, bit buses 36-38, control buses 39 and 40

The first version of the calculation unit 26 (FIG.) Contains the code comparison element 41, the code subtraction element 42. The calculating unit 26 according to the second variant (Fig. 2) contains the Comparison element 41 — the codes, the code subtraction element 42, the elements 43 and 44 of the calculation of the reciprocal value codes. A block 26 of the fourth embodiment (Fig. 3) contains a code comparison element 41 and a modulo ratio calculation element 45. The calculating unit 26 of the fourth embodiment (FIG. 4). contains an element 41 of comparison of codes; an element 42 of reading codes; an element. 46 add codes, element 47 calculating relation codes.

The speed sensor 1 according to the second variant is made in the form of a magnetostriction sound guide 2, a survey element 5, elements 6 and 7 of a link and amplifiers 9-10.

The converter works in a way that

At the initial moment, the converter is in the initial state. A digital signal Query is set on the output bus 34 of the request (FIG. 5a), in response to which, after a response time, a Run signal is set on the bus 38 (FIG. 56), which is used to start the pulse generator 12, A on the first 2x n the partial information inputs of the device control unit 32 are set up with codes and N pp. limits of linear velocity. At the same time, at the outputs of the pulse generator 32, signals are generated which switch the control trigger 33 to one state, thereby removing the service request signal via bus 34, as well as transferring the T-flip-flops 16 and 17 to one state ( Fig. 5e, g) and the start of the voltage converter 8 is the current installed in the body of the speed sensor 1. The translation of the flip-flops 33 and 16, 17 into one state is caused by unblocking the inputs of the shaping amplifiers 12 and 13 (FIG. 5B, N, O), unlocking the blocks 20 and 21 of the AND elements and starting the multiphase generator 19 (FIG. 5I-M), the pulses of which pass, respectively, through the blocks 20 and 2 of the elements AND to the countable K-inputs of the blocks 22 and 23 counters.

When a write pulse arrives at the input of the converter 8, the current at its output produces a corresponding current write pulse, which passes into the interrogation element 5, made in the form of a radial micro coil of inductiveness and installed coaxially with a sound guide 2 stretched relative to its case by means of a tension stabilizer 4 .. At the next moment, an ultrasonic pulsed wave of mechanical deformation (Joule effect), which propagates in both directions, is excited under the interrogation element 5 in the acoustic duct 2. from a source with speed V.

So, with linear mixing at a speed Vj of elements 5-7, kinematically connected with an external object of controlled movement, along the duct 2 within the zone of the established movement limiters placed at its ends, a pulsed ultrasonic wave of mechanical deformation in it reaches elements 6 and 7 readings, made in the form of radial inertia micro-coils, through time

T, l / (ViV,); (V5: VJ, CD

where 1 is the distance between the interrogation element 5 and the read elements 6 and 7,

and, passage through the sound line 2 beneath them, induces read voltage pulses (the villi effect) on their outputs, which are amplified by the formers 9 and 10.

Next, these pulses arrive through the shaping amplifiers 12 and 13 and are restored in form (Fig. 3d), pass through the OR elements .14 and 15 to the counting inputs of the T-flip-flops 16 and 17 and switch them to the initial (zero) state (Fig.5e, g). Translating the T-flip-flops 16 and 17 into the initial state leads to blocking the inputs of the shaping amplifiers 12 and 13 and the blocks 20 and 21 of the AND elements, thus preventing the passage of the generator pulses 19 and counting inputs of the blocks 22 and 23 counters and eliminating the possibility of mechanical impulse noise entering the device outside the conversion cycle from the outputs of read elements 6 and 7, As a result, the KHP-discharge outputs of blocks 22 and 23 counters, executed from K parallel-connected binary counters such as adder-register (on fig 1 not shown), for Time-intervals Tj and T; K codes are generated that can be written as

N,

, - (i-l) ut.x,

(2)

Tj- (i-l)

1, 2,. ,,, K).

- the number of discrete scales of the generator 19 (for Fig.5i-m); - elementary temporary

shift of K-discrete scales; oscillator reference frequency 19,

,

1437998

and the pulse generator 19 is stopped (Figure 5h). At the same time, a pulse shaper 28 is started, the clock pulse of which passes to the input of the delay element 29.

The calculated codes and N, are fed to the inputs of the converters 24 and 25, the code-code, executed according to the combination multi-input adder circuit, respectively, and are converted into n-bit codes according to the Expression

N, iN, .i and N, ZlN,.; ;

(i 1, 2 ,,,,, K) 7 (3).

which are fed to the inputs of block 26 calculations,

Depending on the processing of these

codes, one can get that pl different dependence of the output code on the magnitude of the speed of linear movement.

So, for example, when implementing block 26 in the first embodiment (FIG. 1), the dependence of the value N of the output code on the speed of movement is

, 2 IVxl

 one

to f

about

When implementing block 26 according to the second variant (FIG. 2), the dependence of the value N of the output code on the velocity V of movement is

Ivj

N,

K f

about

-,

40

45

50

35 — when implementing block 26 in the third embodiment (FIG. 3), the dependence of the output code N on speed V of movement is V ± V.

M; -

  V 5: Vx

When implementing block 26 in the fourth embodiment (FIG. 4), the dependence of the NX value of the output code on the velocity V of movement is

N

 V

On the t-bit bottom of the output element 41

the comparison, a code N of the sign of the velocity of the linear movement is generated, which is fed to the control inputs of the subtraction element 42, the polarity of the calculation, and the information inputs of the register 31.

At the next moment, the sync pulse of the driver 28, which is delayed by the delay element 29, registers 27 with the NX code of the result of the current Transformation. At the same time, the N code is written into the register 31

55

the speed of the current value, which from its outputs comes to the 37-character bus, speeds, the registers of the result analysis and control blocks 30 and 32 (not shown in Fig.), respectively, enter the Nj code of the result of the previous Transformation from the outputs

group |

Nrp.i borders

the register 27 and the linear movement speed codes N set up on the first information inputs of block 32. Thus, the result value code NX passes through the result analysis block 30 on

A new block of counters, a block of calculations, a pulse generator, the outputs of which are connected to the information inputs of the first block of elements I, the outputs of which are connected to the corresponding counting inputs of the first block of counters, characterized in that, in order to expand the functionality and increase the accuracy of the converter, the first and second amplifiers-formers, three elements OR, two T-flip-flops, the second block of elements AND, second 25

thirty

the result bus 36 compares its 5th swarm with a counter block, two code-code converters, two registers, a control trigger, a control block, an analysis block, a pulse shaper, a delay element, and a pulse generator 20 is made multiphase, the first and second speed sensor outliers are connected to information inputs of the first and second amplifiers-drivers, respectively, whose outputs are connected to the first inputs of the first and second OR elements, respectively, whose outputs are connected to the T inputs of the first and second, respectively T-flip-flops, the first outputs of KOTOpbix are connected to the control inputs of the first and second blocks of the AND elements and the first and second inputs of the third OR element, respectively, and the second outputs of the first control inputs of the first and second amplifiers of the third, respectively : element OR is connected to the input of the pulse former and the input of the pulse generator, the outputs

40 of which are connected to 1 informational inputs of the second block of elements I, the outputs of which are connected to the corresponding counting inputs of the second block of counters, the outputs of the blocks of the counter are connected through corresponding converters code - code to the first and second groups of the computing unit, the first and second groups of outputs of which are connected with the information inputs of the first and second registers, respectively, the outputs of the first register are connected to the information inputs of the analysis unit and the control unit

a digital equivalence comparator (not shown in Fig. 1) with the N code of the result of the previous conversion, and if the results N, NX coincide, on the equivalence code of block 30 a digital signal will be generated. Duplicate the result that passes to the duplication control bus 39 (Fig. 3) . In the control unit 32 on its digital comparators (in FIG. 1, not shown), a current comparison of the Npn, and NX codes is performed, the result of which is the t-bit code N of the displacement state, coming from the outputs of the block 32 to the bus 38 nor movement. By the same clock pulse of the driver 28, the control trigger 33 is switched to the initial (zero) state, therefore, the inputs of the driver amplifiers 12 and 13 are blocked and the service request signal is generated on the bus 34.

At another time, the sync pulse of the generator 28, delayed by the delay element 29, on the bus 40 of the 13c synchronization exhibits a digital pulse signal Synchronization (Fig. 3c). At this, the current conversion cycle of the device is completed, the device is prepared for the next conversion cycle, which begins with the arrival of the next digital signal. Start via the input bus 35 of the external control.

Claims (3)

Invention Formula 45 50 roll, the second output of the imaging device is 1. The transducer of the speed of the lines of the 55 polling pulses is connected to the second displacement sensor, comprising a speed sensor, a polling pulse generator, the first output of which is connected to the input of the speed sensor, A new block of counters, a block of calculations, a pulse generator, the outputs of which are connected to the information inputs of the first block of elements I, the outputs of which are connected to the corresponding counting inputs of the first block of counters, characterized in that, in order to expand the functionality and increase the accuracy of the converter, the first and second amplifiers-formers, three elements OR, two T-flip-flops, the second block of elements AND, the second block of counters, two transducers code-code, two registers, control trigger, block control, analysis unit, pulse shaper, delay element, and generator with the inputs of the first / and second OR elements and the first control trigger input, the first output of which is connected to the second control inputs of the amplifier tampers, the output of the pulse shaper is connected to the input of the delay element, the first output which is connected to the inputs of the installation of zero meter blocks, with the inputs of the register recording, the control inputs of the analysis block and the control block, and the second control trigger input, the pulse generator input the probe is the polling input of the converter, and the outputs of the control unit are outputs of the speed interval code, the outputs of the second register and the bit outputs of the analysis unit are outputs of the sign code and the speed code, respectively, the additional output of the analysis unit is the duplication output, the second the output of the delay element is the synchronization output, and the second control trigger output is the converter request output, 2. The converter according to claim 1, characterized in that the speed sensor contains a magnetostrictive acoustic conductor, two acoustic absorbers, a tension stabilizer, a interrogation element, two elements of a coupling and three amplifiers of the former, one end of the magnetostrictive sound cable connected to the housing through 1 The first acoustic absorber, and the other through serially connected second acoustic absorber and tension regulator, interrogation elements and coupling elements are located along the magnetostrictive acoustic duct, coupling elements are located on both sides of the interrogation element at the same distance, the output of the first amplifier-former is connected to the element polling, the input is the input of the speed sensor, the inputs of the second and third amplifiers-drivers are connected to the outputs of the corresponding elements of the reader and, while the outputs are the speed sensor outputs. 3. The converter according to claim 1, about T — characterized in that the calculation unit contains a code subtraction element and a code comparison element, the first and second groups of information inputs of which are respectively interconnected and are respectively the first and second groups of block inputs, outputs The code reading unit is the first group of block outputs, the outputs of the code comparison unit are connected to the control inputs of the code reading unit, and are the second group of block outputs. 46 Ultrasound K j    . I and Mi I 1II I I M J I y rrWi i 11 11111 and | 1111 and and 1111 p and yf tsh Jty jlll 11J LilJJ I I I I And I I 1 AND 1 I 1 1 U H .ff  ./7 .,. fg ø latitude 1 / in.-L jQ-J ffOKupoSai e L X u r 6 9I. Synchronization Jl I I t, t 5 i ffi Sfiupo6aHue L result I I I I And I I 1 AND 1 I 1 1 U H .ff  ./7 .,. u r Jl ffi Sfiupo6aHue L Result