SU1260701A1 - Source of pedestal signal to balanging machine - Google Patents

Abstract

The invention relates to a balancing technique and can be used in balancing machines. The aim of the invention is to improve the accuracy due to the greater stability of the amplitudes and phases of the quadrature components of the reference signal. The signal from the reference signal sensor, through the control circuit, sends to the inputs of quadrature component forming circuits, including a square voltage generator, a triangular voltage generator, and a non-reactive filter. The start-up of a tsetsek is carried out using a control circuit, associated with it an accumulating counter and two reversible counters. The output signal of a non-reactive filter is stabilized with BK.uoMCiiHoro in the feedback circuit of a triangular voltage generator of a code-current converter code-current, to the information input of which a signal is output from the register connected to the control circuit and to the glow meter. 2 Il. S (L 1CHE O5

Description

The invention responds to the balancing technique and may be unsupported in balancing machines for obtaining sinusoidal onor stresses necessary for measuring the imbalance of the balanced rotors.

The aim of the invention is to improve the accuracy of imbalance imbalance due to the greater stability of the amplitudes of the quadrature components, their reference signal and their mutual phase shift during fluctuations of the velocity vrash.

FIG. 1 shows a block diagram of the reference source to the balancing machine; in fig. 2 - timing charts of the elements of the block diagram.

The source of the reference signal to the balancing machine contains the sensor 1 of the reference signal, reacting to the label applied to the surface of the product to be balanced, the generator 2 of the reference frequency associated with them by the first and second inputs of the control circuit 3 connected to its first output accumulating counter 4 , reversible counters 5 and 6, the counting inputs of which are connected to the second and third outputs respectively, and the control outputs to the third and fourth inputs of the control circuit 3, respectively, two identical formation chains to The control components are included, each being connected in series to a generator 7 (8) of a rectangular voltage, the input of which is connected to the fourth (fifth) output of the control circuit 3, a generator 9 (10) of a triangular voltage, made in the form of series-connected converter 1102 ) the current code value, the second input of which is connected to the output of the reversible counter 5 (6), and the current-voltage converter 13 (14), and the non-reactive filter 15 (16), the register 17, the first input of which is connected to the 1-output circuit 3 controls, and the second - the accumulator output of the counter 4 and the installation input of the reversible counter 5, and connected to the output of the register 17, are equipped with code-current converters 18 and 19, the second inputs of which are connected respectively to the inputs of non-reactive filters 15 and the outputs respectively to the second inputs of the converters 13 and 14 current voltage.

The source works as follows.

The sensor 1 of the reference signal produces, when the balancing part rotates, reference pulses (Fig. 2a), which enter the control circuit 3, which generates signals, determining the sequence of operation of rectangular voltage generators 7 and 8, accumulating and reversing counters 4-6 and register 17

The reference frequency generator 2 generates pulses of the specified reference frequencies 1 and f / 4. Accumulating counter 4 counts them5

0

the pulses of the reference frequency generator 2, passing through the control circuit 3 and following at a frequency f / 4, during one revolution of the balanced rotor, i.e. between two consecutive pulses of the sensor of the reference signal (Fig. 26). But the leading edge of the pulse of sensor 1 is the data of accumulating counter 4 and rewriting register 17 and reversing counter 5, after which the accumulating counter 4 is reset to zero by a signal from control circuit 3 and then starts counting again. The delay time is determined only by the frequency parameters of accumulating counter 4, register 17 and reversing counter 5. At the same time, reversing counter 5 starts working in subtraction mode with frequency f (Fig. 2c), and reversing counter 6 in addition mode with that same frequency (Fig. 2d). The counters 5 and 6 are reversed by signals from the control circuit 3, initiated when one of the reversing counters 5 and 6 is reset. In connection with the fact that the frequency of operation of the reversible counters 5 and 6 is four times higher than the frequency of the accumulating counter 4, containing their information changes 5 times four times from (number rewritten to reversible counter 5 from accumulating counter 4) to zero during the time between pulses of sensor 1 of the reference signal. The information outputs of the reversible counters 5 and 6 are connected to the information inputs of the current value code-current converters 11, 12.

The bipolar signals of stable amplitude from generators 7 and 8 of rectangular voltage are applied to the inputs of the reference voltage of these converters (Fig. 2 d, e). The control signals of these generators have a mutual phase shift of P / 2, and changes in the control levels of each of them occur with a period of l / 2f. The formation of these signals is determined by 0 the moments of zeroing of the reversible counters 5 and 6.

The Omax number, recorded in register 17, is fed to the information inputs of the scaling converters 18 and 19 of the code-current, included in the feedback circuit of the current-voltage converters 13 and 14, the outputs of the latter being connected to the reference voltage inputs of the specified scaling converters 18 and 19 code-talk.

The operation of the current-to-voltage converters 13 and 14 is to maintain a zero value of the algebraic sum of the input currents, which in this case are the output currents of the code-current converters 11, 12 and 18, 19.

This condition can be represented 5 in the form: I | 1, and

0

five

ll ud-guih. |. 2 L

g,

and out. About max. Kvykh, - 2. °

where and is the output voltage of the generator 7 (8) of a rectangular voltage;

D is the input code value of the converter 11 (12) code-current of the current value;

RBUX.IJ RBbix.2 - output impedances of current-value code-current transducers 11 and 12 and code-current scaling transducers 18 and 19;

UBUX. - the output voltage of the converter 13 (14) current-voltage;

n is the number of bits of converters 11, 12 and 18, 19 code-current.

When using identical code-current transducers, for example, in an integral design, their output impedances with a high degree of accuracy are equal (Quix1 Quix.2). Then from the written relations we get

D

ivyh U

D.

25

The output voltage of the current-voltage converters is triangular, its branches are quasilinear and their degree of deviation from the linear law is determined by the magnitude of the discretes of the code-current converter used and depends on the number of bits of the latter (Fig. 2g, h).

Since D max - the current code on the information outputs of the reversible counters 5 and 6 varies from O to D max, the amplitude is ived. triangular voltage is always equal to and.

The quadrature triangular voltages from the outputs of the current-voltage transducers 13, 14 (Fig. 2g, 3) are fed to inputs 35, and the third and fourth inputs of non-reactive filters 15 and 16, from the outputs of which quadrature sinusoidal voltages are removed with stable amplitude and phase (Fig. 2 and k).

As current-value transducers 11 and 12, for example, multiplexing digital-analogue converters can be used, and current-voltage transducers 13 and 14 can be inverted, and operational amplifiers can be used.

The use of code-to-current converters with the number of bits 8-12 allows to ensure a small value of the increments of variation of the triangular voltage, and hence its high linearity. In connection with this

A 20 signal that responds to m balanced product, and two circuits of quadrature composition including each direct voltage generator, three voltage generator and non-reactive filtering by the fact that, in order to increase the imbalance, it is controlled with a reference oscillator reference frequency sensor

,, Q is the second input of the control circuit and two reverse circuits, the counting inputs of which are connected by the three outputs of the control circuit of the fourth and fifth outputs of which are connected to the generators of the rectangle

equal outputs of reversible ticks, a register, the first input is connected to the sixth output of the circuit, and the second - from the output of the counting device and the setting input

40, with a dual register code converters, triangular generators, for example, are made in the form of serial code-current converters of the current, the second inputs of which are connected to the outputs, and the outputs are connected to the second of the corresponding code-current scaling switches. .

45

ten

25

5, and the third and fourth entrances

The distortions of the shape of the sinusoidal stresses are negligible.

Updating the value of D-, max during each revolution ensures tracking the frequency of the output voltage of the reference source as the rotational speed of the balanced rotor.

The phase shift error of the output quadrature source voltage at Tsmax 2 is equal to being a small and stable value.

Thus, the source of the reference signal ensures that the amplitudes of the quadrature components of the reference signal with high accuracy, regardless of the speed of rotation of the balanced part, and high accuracy and stability of their mutual phase shift.

Claims (1)

Invention Formula The source of the reference signal to the balancing machine, which contains a sensor of the support signal, which responds to the label on the product being balanced, and two chains of quadrature component formation, including each square-voltage generator, triangular voltage generator and non-reactive filter, differing in that In order to improve the accuracy of the imbalance, it is equipped with a control circuit, the first input of which is connected to the sensor of the reference signal, a reference frequency generator associated with , Q is the second input of the control circuit, the accumulator and two reversible counters, the counting inputs of which are connected to the first three outputs of the control circuit, the fourth and fifth outputs of which are connected to rectangular generator generators with control outputs of the reversible counters, register, first input which is connected to the sixth output of the control circuit, and the second to the output of the accumulating counter and the installation input of the first reversible counter, and two scaling transducers connected to the register output d-current, and a triangular voltage generators are in the form of series-connected inverters code-current current value, the second inputs of which are connected to the outputs, and the outputs - to the second inputs of the respective code converters scaling-current. five (rig 2 Compiled by Yu. Krugloi Editor N. Ch. RiatTechred I. Veres Proofreader T. Kolb Order 5216/37 Circulation 778 Subscription VIIIPI of the 1st CCCI Committee but inventions and discoveries 113035. Moscow, Zh-35. Raushsk nab. 4/5 Branch; lin "Patent, i-. Uzhgorod, st. Project, 4