SU1404856A1 - Device for measuring parameters of rotating body disbalance vector - Google Patents

Abstract

This invention relates to a balancing technique. The purpose of the invention is to expand the dianazone measurement by forming an optimal pulse train for determining the phase. The signal from the pulse generator 9 through the first element 11 is fed to the first counter 16. The second and third counters 17 and 18 receive signals from the electronic pulse generator 10. The formation of certain sequences is carried out with the help of triggers 5-8 and elements 11-11 -15. The calculator 19 detects the imbalance phase from the signals from counters 16-18 and indicates it on the digital indicator 20. The unbalance value is determined by unbalance meter 2, the signal on the end of the measurement cycle is set by the pulse generator 3 PULSES. 1 il.

Description

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The invention relates to a balancing technique and can be used in balancing rotating parts, assemblies and mechanisms.

The purpose of the invention is to expand the measurement range by optimally forming pulse sequences for determining imbalance.

The drawing shows a functional diagram of the proposed device.

The device contains a clock pulse generator 1, an unbalance meter 2 connected to its output by a pulse shaper 3 and an indicator 4, four flip-flops 5-8, the output of the first of which is connected to the information input of the second, the output of the second to the information input of the third, and the synchronizing input of the second with the output of the imaging unit 3 pulses, the generator of 9 pulses, the generator of 10 electronic pulses, five elements AND 11-15, the first input of the first element AND 11 is connected to the first input of the second bis by the output of the first 5 triggers, the second input of the first element 11 and 11 with interconnected generator output of 9 pulses, synchronization inputs of the third 7 and fourth 8 flip-flops and a second input of the fifth element 15, the third input of the first element 11 11 with the third input of the second element 12 and the inverse output of the second trigger 6, the second input of the second element And 12 - with the second input of the third element 13 and with the output of the generator 10 electronic pulses, the first inputs of the third 13 and the fifth 15 elements And, respectively, with inverse outputs of the third

7 and the second 6 triggers, the inputs of the fourth element I 14 - with the outputs of the generator 1 clock and the fourth trigger 8, and the output with the input of the first trigger 5, three counters 16-18, whose inputs are connected respectively to the outputs of the AI elements - 13, and the zeroing the input of the third counter 18 is with the output of the fifth element I 15, the calculator 19, the inputs of which are connected to the outputs of the counters 16-18 and the direct output of the third trigger 7, and the digital indicator 20 connected to the output of the calculator 19.

The generator 1 clock can be performed, for example, in the form of a contactless inductive measuring transducer, producing a clock pulse when passing a label applied to the object of balancing through the working area of the sensor.

8 As a label, a groove can be used on the periphery of the metal shaft of the balancing object.

The unbalance meter 2 can be performed, for example, on the basis of a contactless inductive transducer, providing measurement of the relative oscillations (vibrations) of the balancing object during its rotation in the supports, amplification of the vibration signal and filtering to highlight

component corresponding to the rotational speed of the object. Shaper 3 pulses can be made on the basis of an operational amplifier type K 140UD20 with

appropriate frequency-dependent feedback, ensuring stable signal formation. The imaging unit 3 generates pulses when the signal from the unbalance meter 2 is maximum. The indicator 4 can be made in the form of an oscilloscope C1-94. Digital elements - triggers 5-8, elements And 11-15 and counters 16-18, respectively, can be made on the basis of typical digital-integrated circuits of 133, 155, 161 series, etc. The pulse generator 9 can be made in the form of a disk, mechanically coupled and rotating together with a body to be balanced, having n holes for forming pulses with a photosensor. The generator 10 of electronic pulses can be performed according to a typical scheme on the basis of a K 155AGZ driver. The calculator 19 can be made on the basis of the microcomputer "Electronics-60 or on the basis of any microprocessor data processing set. Digital

Indicator 20 is a typical output device, for example, on the basis of a LED display panel or a printing device of the type “CONSUL-256.

The device works as follows.

When the device is turned on, the calculator 19 generates a "Reset (not shown)" signal, according to which the triggers 5-8 and the counters 16-18 return to the initial zero state. During the rotation of the object balancing generator 9 pulses produces

single pulses through the known discrete angle 9 of the rotation of the object balancing. The first pulse from its output after the signal "Reset calculator 19 is fed to the synchronization input of the fourth trigger 8, to the information input of which

a single potential is connected, and it is set to a single state. As a result, the signal of a single level from the output of the fourth trigger 8 is fed to the second input of the fourth element I 14 and allows

the passage through it of pulses from the output of the generator 1 clock. Since the third trigger 7 is reset in the initial state, the signal of a single level from its inverse output goes to the first input of the third element AND 13 and permits the passage of pulses from the generator output 10 electronic pulses to the counting input of the third counter 18. Since the first trigger 5 is in the initial state zeroed, the signal of a single level from its inverse output is present at the first input of the fifth

element 15 and allows the passage through it of pulses from the generator output 9 pulses to the zeroing input of the third counter 18. Thus, the third counter 18

zero on each pulse of the generator 9 pulses.

Upon further rotation of the object of balancing, the generator 1 of the sync pulse generates a pulse, which sets the first trigger 5 to one state. In this case, the unit level signal from its direct output goes to the first inputs of the first 11 and second 12 elements AND and the information input of the second trigger 6. As a result, pulses from the output of the generator 9 pulses start to flow through the first element 11 to the counting input of the first counter 16, and the pulses from the generator 10 of the electronic pulses through the second element I 12 to the counting input of the second counter 17. The zero-level signal from the inverse output of the first trigger 5 is fed to the first input of the fifth element I 15 and blocks further input and pulses from the generator output 9 pulses to the zeroing input of the third counter 18. When the balance object is further rotated, there comes a moment when the signal from the output of the unbalance meter 2 reaches the maximum value. At this moment, the pulse shaper 3 generates a single pulse, which is fed to the synchronizing input of the second trigger 6 and sets it to the single state, because its information input contains a single level signal from the direct output of the first trigger 5. As a result, the zero level signal from the inverse the output of the second trigger 6 is supplied to the third inputs of the first 11 and second 12 elements And and blocks the further flow of pulses to their counting inputs. The signal of a single level from the direct output of the second trigger 6 is fed to the information input of the third trigger 7.

Upon further rotation of the balancing object, a generator of 9 pulses is triggered. As a result, the third trigger 7 is set to one, the zero-level signal from its inverse output blocks the further arrival of pulses through the third element 13 to the counting input of the third counter 18, and the unit-level signal from its direct output goes to the fourth input of the calculator 19, certificate of completion of the formation of operands in the counters 16-18. According to this signal, the calculator 19 sequentially selects the operands from the counters 16-18 into the internal memory and calculates the angular position of the unbalance vector with respect to the synchrometer according to the expression

, e, lz

where X is the operand formed in the first counter 16 and representing the number of impulses of the generator 9 imp;; Ls, corresponding to the phase of the unbalance vector;

Aa is the operand formed in the second counter 17 and representing the number of pulses of the generator 10 electronic pulses, corresponding to the phase of the unbalance vector;

Ls - the operand formed in the third counter 18 and representing the number of imtims of the generator 10 electronic pulses, corresponding to the "displaced phase of the unbalance vector, i.e. the phase of the beginning of which is the first pulse from the generator of 9 pulses, before the clock generator generates the pulse, and the end - the arrival of the first pulse from the generator 9 pulses, after the signal from the unbalance meter 2 reaches the maximum value.

O is a known discrete angle of rotation of the object of balancing, through which the generator of 9 pulses produces pulses. The results of the calculations are transferred to a digital indicator 20. The unbalance vector magnitude values are recorded by indicator 4. At this point, the single measurements end. Next, the calculator again generates a "Reset" signal, after which the operation of the device is repeated, ensuring continuous measurement of the parameters of the unbalance vector in real time. If it is necessary to obtain measurement results averaged over several cycles, single measurements are accumulated in the internal memory of calculator 19, and then the average value can be obtained as the arithmetic average over a given number of averaging cycles.

The effectiveness of the proposed device lies in a wider measuring range. The known device measures the angular position of the unbalance vector with greater accuracy. However, if the magnitude of the measured angle is less than the magnitude of the discrete angle O of the pulse generator 9, and the signals about the beginning (signal from the sync pulse generator 1) and the end (the signal from the pulse generator 3) of the measured angle are inside angle 6 (i.e. between the occurrence of a pulse from the generator 1 of the sync pulse and the pulse from the generator 3, there were no pulses from the generator 9 and pulses), then the second trigger 6 does not establish a ready signal from its output is not formed and, therefore, the angular position is not is measured. In the proposed device, in contrast to the well-known equivalent: the time component of the "displaced phase of the unbalance vector is not measured from the first pulse from the generator 9 pulses after the arrival of an imp."

from the generator 1 of the clock, and from the first pulse from the generator 9 pulses to the arrival of the pulse from the generator 1 of the clock, which is achieved by forming a sequence of zeroing pulses of the third counter. Due to this, the device is capable of measuring any angles of the unbalance vector, i.e., it has a wider measuring range.

Claims (1)

Invention Formula A device for measuring parameters of an unbalance vector of rotating bodies, comprising a clock generator, an imbalance meter connected to its output by a pulse shaper and an indicator, first and second triggers, the output of the first of which is connected to the information input of the second, a pulse generator, a generator of electronic pulses, and three elements , the first inputs of the first and second of which are connected to the output of the first trigger, the second input of the first - to the output of the pulse generator, and the second inputs of the second and third io - with the output of the generator of electronic pulses, three counters, the inputs of which are connected to the outputs of the respective elements And, a digital indicator and a calculator connected to its input, the inputs of which are connected to the outputs of the counters, characterized in that it is equipped with a third and the fourth trigger, the clock inputs of which are connected to the output of the pulse generator, and the fourth and fifth elements And, the first inputs of which are connected respectively to the output of the clock generator and inverse the first output of the first trigger, the second inputs with the outputs of the fourth trigger and the pulse generator, and the outputs with the input of the first trigger and the zeroing input of the third counter, the direct output of the third trigger is connected to the fourth input of the calculator, inverse with the first input of the third And element, and the information input is with the direct output of the second trigger, the inverse output of which is connected to the third inputs of the first and second elements I, and the synchronization input - with the output of the pulse former