SU1420419A1 - Measuring device for balancing machine - Google Patents

Abstract

This invention relates to a balancing technique and can be used in high-precision balancing machines. The purpose of the invention is to improve accuracy by choosing the optimal gain of the measuring path. For ego, each measuring channel is equipped with an automatic divider and circuits comparing alternating voltage, proportional to the signal from the imbalance sensors, and constant voltage, proportional to the coordinate component of the imbalance. With these elements, there is no overload of the measuring path in amplitude and Uun. and the work of the vectorometer in the optimum range of the scale Lion.mi U; Wow. . The adjustment is made automatically by a divider control circuit for the signals from the comparison circuits. The reference pitch 1 I and., UoM.MaKc, Uoii, mp are set before the measurement starts. 1 il.

Description

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Isobritonium refers to the balancing technique and can be used in high-precision balancing machines.

The purpose of the invention is to improve measurement accuracy by choosing the optimal force coefficient of the measuring path.

The drawing shows a block diagram of the measuring device to the balancing machine.

The device contains serially connected sensor 1 of the reference signal, uC11.pg1x 1b-shaper 2 and generator 3 of reference voltages, two channels 4 and 5 measuring - |) enpy, k, 1 / kdy of which is made in the form of serially connected sensor 6 disb Chance, automatic divider 7 and y: si. 1 8, two synchronous detectors

9 and 1 (, the first inputs of which are connected to the output of the amplifiers 8, and the second

With the corresponding outputs of the generator 3 reference voltages, d | L x P. amplifiers and 12 11 () are stationary; current inputs are connected to the outputs of the respective synch-> detectors, a complex electrode 1 | amp amp vectormeter 13 connected to the outputs of amplifiers 1 and 12 constant current, circuits 14 15 comparisons of the constant on ||) crushing, respectively, but the minimum and 1; 1 cm / s; the inputs of each of which poi i are connected to the outputs of amplifiers 11, 12 of direct current, a 16 un) circuit, a divider whose inputs are connected to the outputs of amplifiers 11, 12 of direct current, and the outputs with unravl, their inputs an automatic divider 7, a division indication circuit 17 connected to control inputs of the automatic divider 7, and an alternating voltage comparison circuit 18; the input of which is connected to the output of the amplifier 8, and the output to the corresponding HU1M input of the control circuit 16: tele.

; An automatic divider provides a variation of the division ratio from 1 to 10. The imbalance of the rotor 19 is measured.

The device works as follows. Before starting operation, when switching on channels 4 and 5 of measurement, a divider control circuit 16 is set to a signal SETTING THE INITIAL CONDITION, with help of which the division factor in the automatic divider 7 is set. Threshold voltage U is applied to alternating voltage circuit 18 , 15 comparing the constant control to the minimum and but to the maximum, the threshold voltages are applied according to I l bmax and Uoiiw f are positive and negative. of full polarity.

In the case of a wrench, a rotary rotor 19, the mechanical oscillations of the axis are converted into electrical value by means of the unbalance sensors 6 in the measurement channel 4 for the right plane KOppeKiuiH n similarly

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measurement channel 5 for the left correction plane. The signal u, unbalance sensor 6, the transmission velocity of the ends of the rotor axis 19, arrive at the input of the automatic divider 7, where the imbalance signal is divided and then the non-time signals amplified by amplifier 8 are fed to the inputs of the synchronous detectors 9 and 10 and the variable comparison circuit 18 by -proversion to the maximum.

If the amplitude of the signals at the output of the amplifier 8 exceeds the allowable value IJou set in the comparison circuit 18, then the circuit 18 outputs a signal to the positive input of the divider control circuit 16, with which the division factor in the automatic divider 7 will increase.

The comparison circuit 18 will output signals to the positive input of the divider control circuit 16 until the AC voltage at the output of the amplifier 8 becomes less than the threshold voltage Uoii., Set to 1 to 1 in comparison to the circuit 18.

Synchronous detectors 9 and 10 receive signals from amplifier 8 and control signals in the form of meanders from a generator of 3 reference voltages. Synchronous detectors 9 and 0 allocate constant voltages, proportional to the projections of the unbalance vector on the coordinate axis. These DC voltages are amplified in DC amplifiers, 11 and 12, and are applied to the vector meter 13 and DC voltage comparison circuits 14, 15, respectively, for maximum and minimum.

Scheme 14 for DC constant-voltage comparison is working at the minimum on the principle of AND, and circuit 15 for comparing constant voltage to the maximum of the OR principle.

If the voltage from the output of the amplifiers And and 12 (both signals are simultaneously non-voltage -t-Uonmi or --LVii Titft., Then the circuit 15 sends a signal to the negative input of the circuit 16 of the divider control, which gives the command to decrease the ratio () and- division factor in automagic divider 7.

E: If the voltage from the output of usg, .1 drivers, or 12 (one of the signals and, and both) exceeds the threshold voltages - -Orx or - Junmaf, given in the comparison circuit, then it generates a signal 1, under his him; ja plus input of the circuit 16 ugfaolen ;; e. by the telegram, which issues a command to compare the division ratio in the automatic divider 7.

An increase or decrease in the division ratio will occur as long as the constant voltages from the outputs of the amplifiers 11 and 12 lu Oudet exceed the threshold values 14 and 15 cpaBfie-p and.

The dividing indication circuit 17 operates in the automatic mode of indicating the division ratio of the automatic divider 7.

The operator judges the unbalance of the rotor by the product of the division factor in the automatic divider 7 and displayed on the left panel of the circuit 17 indicating the division of the value of the measured unbalance on the scale of the electrodynamic vector meter 13.

Claims (1)

Invention Formula Measuring device to the balancing machine, containing in series connected sensor of the reference signal, amplifier-shaper and reference generator. voltages, two measurement channels, each of which is designed as an unbalance sensor, an amplifier, two synchronous detectors, the first inputs of which are connected to the amplifier, and the second to the corresponding outputs of the reference voltage generator, and a complex electrodynamic vector meter, characterized in that in order to improve the accuracy of measuring the imbalance, it is equipped with an automatic divider included in each measurement channel, the input of which is connected with an unbalance sensor, and an output with an amplifier input, a divider control circuit, the outputs of which are connected to the control inputs of an automatic de-hp, dividing indication circuit, goodi1; g; Controlled inputs are automatic, with a divider, two amplifiers with a constant current, the inputs of which are connected to the outputs of the corresponding synchronous detectors, and the outputs - with a complex electrodynamic vector meter, minimum voltage maximum comparison circuits, the inputs of each of which are connected with the outputs of the DC amplifiers, and the outputs with the corresponding inputs of the control circuit of the divider and the circuit comparison of the AC voltage to the maximum, the input of which is connected to the output of the amplifier, and the output to the corresponding input of the divider control circuit.