SU1397759A1 - Device for determining amplitude and phase of disbalance - Google Patents

Abstract

This invention relates to a balancing technique. The purpose of the invention is to improve the accuracy and reliability by automatically performing measurements at the resonant frequency. The sensors of reference 1, position 3 and vibration 15 provide information about the phase and amplitude of the imbalance at a variable rotational speed. At the moment of passing the resonant frequency, determined by the clock generator 8 connected to the coincidence element 9, the contents of the memory elements 6 and 18 and the decimal counter 10 are transferred to the digital indicators 7 and M, displaying the phase and amplitude of the imbalance, and the indicator 19 characters. 2 Il. "(L

Description

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This invention relates to a balancing technique and can be used as part of resonant type balancing machines.

The purpose of the invention is to improve the accuracy, accuracy and accuracy of the imbalance parameters by automatically selecting the moment of passage of the resonant frequency at which measurements are made.

FIG. 1 shows a block diagram of the device; in fig. 2 shows voltage diagrams at the outputs of the elements of the device. FIG. 2 denotes: U5 the voltage of the vibration displacement; The sampling voltage at the output of the digital-to-analog converter; and 1 is the voltage at the output of the dual comparator; F) 1. voltages at the outputs of the 1st and 2nd photosensors; N, .. ,, N is the number of labels written to the buffer register.

The device contains serially connected start sensor and pulse generator 2, successively connected position sensor 3, second pulse generator 4, decimal counter 5, the reset input of which is connected to the output of the first driver 2 pulse, memory element 6 and digital indicator 7 serially connected clock generator 8, coincidence element 9, second decimal counter 10 and second digital indicator 11, successively connected binary counter 12, whose input is connected to the output element 9 matches, and a digital-analog converter 13 (D / A converter), a reset pulse shaper 14, the output of which is connected, to the reset inputs of the second decimal and binary counters 10 and 12, a series-connected vibration sensor 15, an amplifier 16, an analog comparator 17 , the second memory element 18 and the character indicator 19, the connected analog comparator 20, the inverse inputs of which are connected to the output of the D / A converter 13, and the output to the second input of the coincidence element 9, the second input of the second digital indicator 11 and the clock inputs of the memory elements 6 and 18 analogue A new inverter 21, the input of which is connected to the output of the amplifier 16 and the first direct input of the dual analog comparator 20, and the output to the second direct input of the latter, and a digital inverter 22 whose input

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connected to the output of the second memory element 18 and the first gate input of the dual analog comparator 20, and the output to the second gate output of the latter.

The device works as follows.

The origin sensor 1 and the position sensor 3 are installed at the rotor mechanism and ensure the formation of impulses at the moment of passage of the initial position mark and the corresponding angular mark. Tags may be magnetic or reflective; respectively, sensors 1 and 2 are made either magnetically sensitive or optical. With the passage of the initial position mark, a pulse arrives from the start-of-counting sensor 1, which is formed by the pulse shaper 2 and resets the decimal counter 5 to the initial position. The latter recalculates the pulses from the position sensor 3. Thus, the code in decimal counter 5 corresponds to the current value of the angular position of the rotor mechanism. If the position sensor 3 generates a pulse when each corner mark passes through the roto. ra, then the recorded code corresponds to the number of the corner mark. The signal from the vibration sensor 15 is fed to the amplifier 16 and then to the input of the analogue comparator 17, the output of which will be single if the input is half wave, and zero if the input is negative half wave. Depending on this signal, the first or second comparator of the dual analog comparator 20 is turned on by applying a corresponding gate signal. The direct input of the currently operating analogue dual comparator 20 thus receives a positive input signal, which is compared with the output signal of the DAC 13, which captures the maximum value of the signal at the current time. Before starting the measurement with the signal from the former of 14 reset pulses, the counters 10 and 12 are reset to the initial zero position, after which the rotor mechanism is transferred either to the speed set mode; or, conversely, a reduction in the number of revolutions begins.

When the output of the dual analog comparator 20 is a single signal, the pulses from the clock generator 8 pass through the coincidence element 9 and are read by the counters 10 and 12 until the input signal reaches its maximum value. At the time of this maximum, the dual analog comparator 20 switches, which causes writing to memory elements 6 and 18. The position and character codes are displayed on a digital indicator 7 and a character indicator 9, respectively.

An imbalance amplitude estimation code from decimal counter 10 is output to a digital detector 1 1. When approaching the resonant mode (due to acceleration or speed reset), the readings are corrected and the final imbalance values are fixed at the resonant frequency, where the influence of noise and noise the minimum. In this case, the rotor mechanism is in the region of resonance for a short time.

Thus, the measurement of the amplitude, sign, and angular position of the imbalance is provided with a minimum interference effect with automatic selection of the estimate at the resonant frequency, which increases the reliability and accuracy of the estimate.

Claims (1)

Invention Formula An apparatus for determining the amplitude and phase of unbalance, comprising a series-connected sensor the reference point and the first pulse shaper, connected in series with the position sensor and the second pulse shaper, connected in series with the vibration sensor and amplifier, connect in series five The first memory element and digital indicator, the second digital indicator and the memory element, the coincidence element and the reset pulse shaper, characterized in that, in order to improve accuracy and reliability, it is provided with a clock generator, the output of which is connected to the input of the coincidence element, serially connected by a binary counter, the input of which is connected to the output of the coincidence element and the reset input to the output of the reset pulse shaper, and a digital-analog converter, the first and second decimal counters, The ports of which are connected respectively to the outputs of the second pulse driver and the coincidence element, the reset inputs to the outputs of the first pulse driver and the reset pulse generator, and the outputs to the inputs of the first memory element and the second 5 digital indicator, an analog inverter, analog comparator, whose output connected to the input of the second memory element connected to the output of the latter by a digital inverter, a rum and a sign indicator and a dual analog comparator, the first direct input of which is connected to the output home amplifier, analog inverter input and direct analog comparator input, the second direct input - with the analog inverter output, the first strobe input - with the digital inverter input, the second strobe input - with the output of the last, inverse IC inputs - with the digital-analogue converter output and the output is with the second input of the matching element, the second input of the second digital indicator, and the clock inputs of both memory elements. 0 five 0 "M