SU871010A2 - Balancing machine measuring device - Google Patents

Description

one

The invention relates to a measurement technique and can be used to balance rotating bodies, in particular high-speed rotors, as well as to control the amplitude and phase characteristics of mechanical and electrical systems.

According to the main auth. No 748156 is known a measuring device of a balancing machine, comprising a voltage conversion circuit including an imbalance sensor connected in series, a differential voltage-to-frequency converter and two parallel accumulators, each of which are made in. the form of a switch, a reversible counter and a reverse control circuit, the inputs of which are connected respectively to the outputs of the reversible counter and the null organ, and the input of the latter is connected to an imbalance sensor, as well as a control circuit including in series co-operation. common sensor reference signal, pulse shaper, converter time interval in the code ,. a divider and a recorder, each of the accumulators of the voltage conversion circuit being connected to the second input of the control divider. L1.

This measuring device does not allow an imbalance in a wide dynamic range to be estimated by its magnitude and frequency, which is explained by the limited length of the discharge grid of the storage device and the time interval into code converter.

The purpose of the invention is to expand the dynamic range in size

10 unbalance and frequency.

The goal is achieved by the fact that the measuring device of the balancing machine is equipped with series-connected circuit

15 OR, reversible counter, included summing inputs and, decoder-. a torus and a controlled attenuator connected between an imbalance sensor, a differential voltage-to-frequency and a zero-body transmitter, as well as two code analysis schemes, the input of which is connected to the output of the corresponding pulse counter, and the outputs are connected to

25 by the subtracting input of the reversible counter, the serial output of each pulse counter is connected to the input of its high-order bit and the input of the OR circuit, and the output of the reversible counter is connected to the second input of the recorder. . In addition, the converter of the time interval into the code is made in the form of a serially connected reference frequency generator, a discrete tunable frequency divider, a third key, and a third pulse counter, and the device is equipped with a third reverse analysis circuit connected in series, a second reversal counter included in the subtracting input , the second decoder and the second discretely tunable frequency divider, which is connected between the differential voltage-to-frequency converter and the accumulators, One of the third circuit and the code link is connected with the output of the third pulse counter, the serial output of which is connected simultaneously with the input of its higher-order bit, the shift inputs of the first and second pulse counters and the summing input of the second reversing counter, the output of the latter is connected with the third input of the recorder and the second input of the second discretely tunable frequency divider is associated with the output of the second decoder. The drawing shows a block diagram of the measuring device of the bansing machine. The device contains an unbalance sensor 1 connected in series, a controlled attenuator 2, a differential voltage-to-frequency converter 3, and a discretely tunable frequency divider 4 with a two-channel drive, the first channel of which contains key 5 and counter b of pulses, and the second - key 7 and counter 8 of pulses , two reverse control circuits 9 and 10, the outputs of which are connected to the corresponding control inputs of counters b and pulses, a null organ 11, the output of which is connected to the first input of the reverse control circuits 9 and 10, and input with the output of the controlled attenuator The control circuit of the device consists of the successively connected sensor 12 of the reference signal, the generator of 13 pulses, the converter 14 of the time interval into the code, the divider 15 and the recorder 16. The converter 14 of the time interval into the code is made in the form of successively included oscillators 17 pulses, a discretely tunable frequency divider 18, a third key 19, and a third pulse counter 20, and the control input of the key 19 is combined with the control input of the key 5 of the two-bay drive and Aligned to the output of the pulse former 13 pulses. The device is equipped with series-connected OR circuit 21, a reversible counter 22, a summing input, and a decoder 23, the output of which is connected to the second input of a controlled attenuator 2, a code analysis circuit 24 and 25, the input of each of which is connected to the outputs of the corresponding counter b and 8 pulses, and the outputs are connected to subtracting the input of the reversible counter 22, the serial outputs of the counters b and 8 pulses are connected to the inputs of their higher bits and the inputs of the OR circuit 21, and the output of the reversing counter 22 is connected to the second input of the recorder 16. The device is also equipped with serially connected by a third code analysis circuit 26, a second reversible counter 27, a connected subtractive input, and a second decoder 28, the output of which is connected to the second inputs of the discretely tunable frequency dividers 4 and 18. The input of the third code analysis circuit 26 is associated with the output of the third counter 20 pulse-in, the serial output of which is connected simultaneously with the input of its most significant bit, the shift inputs of the first and second counters b and 8 pulses and the summing input of the second reversing counter 27, and the output of the last associated with the third input of the recorder 16. The device operates as follows. When the rotor rotates, the signal from the sensor 12 of the reference signal arrives at the shaper of 13 pulses, the two outputs of which form signals shifted between themselves in phase by 90 °, one of which enters the key 19 of the time converter 14 in the code. At the output of the pulse counter 20, the value of the current period of rotation of the rotor is formed. The signal from the unbalance sensor 1 is through a controlled attenuator 2, a differential voltage-to-frequency converter 3 and a discretely tunable frequency divider 4 to the inputs of keys 5 and 7 and then to counters b and 8 of drive pulses. The signals from the outputs of the pulse driver 13 are fed to the control inputs of the keys 5 and 7 of the accumulators. Circuits 9 and 10 of the control of the reverse of each accumulator analyze the states of counters b and 8 and the null organ 11, issuing the corresponding signals to both inputs of counters 6 and 8, transferring them to addition or subtraction mode. Codes from the outputs of the counters are fed alternately to a divider 15 for dividing by codes received from the counter 20 pulses of the time converter 14 in the code. Alternately, the in-phase and quadrature components of the imbalance at the output of the divider 15 are transmitted to the recorder 16.

At the same time, using the code analysis circuits 24 and 25, the value of the codes at the output of counters 6 and 8 is determined to transfer the reversible counter 22 to the subtraction mode, and the OR 21 scheme is used to analyze the state of the higher bits of counters 6 and 8 to convert the reversible counter 22 to add mode.

The code from the output of the reversible counter 22 is fed to the recorder 16 and simultaneously converted by the decoder 23 to supply the corresponding signal to the control input of the controlled attenuator 2.

At the same time, using the code analysis circuit 26, the code value at the output of the pulse counter 20 of the time interval converter 14 to the code for switching the second reversible counter 27 to the subtraction mode is determined, and using the signal from the high bit when the pulse counter 20 overflows, the reversible counter is converted 27 in addition mode. The code at the output of the reversible counter 27 is fed to the recorder 16 and simultaneously converted by the decoder 28 to supply the corresponding signal to the control inputs of the discretely tunable frequency dividers 4 and 18.

Such a construction of the measuring device of the balancing machine makes it possible to determine the unbalance parameters in a wide dynamic range of rotor rotation frequencies and unbalance values, and also improves the balancing accuracy and ensures the expansion of the technological capabilities of the balancing equipment.

Claims (2)

1. Measuring device of the balancing machine according to auth. No. 748156, characterized in that, in order to broaden the dynamic range by the imbalance, it is equipped with an OR circuit connected in series, with a reversible counter, switched on with the input, a decoder and a controlled attenuator included between the imbalance sensor, differential voltage converter and frequency a null organ, as well as two code analysis schemes, the input of each of which is connected to the output of the corresponding pulse counter, and the outputs are connected to the subtractive input of the reversible counter, according to ledova0 Tel'nykh output of each counter momenta vhodott connected with its most significant bit and the input cxf OR s, and output reversing COUNT - is connected to the second input regi -lratora. five 2. Measuring device according to Claim 1, characterized in that, in order to expand the dynamic range in frequency, the time interval to code converter 0 is made in the form of a serially connected reference frequency generator, a discretely tunable frequency divider, a third key and a third pulse counter, and the device is equipped with a third analysis circuit connected in series, a second reversible counter, switched on by a chitagral input, a second decoder, and a second discretely tunable frequency divider, which , included between the differential voltage converter. in frequency and accumulators, the input of the third circuit, the code is connected with the output of the third a pulse counter, the serial output of which is connected simultaneously with the input of its highest order, the shift inputs of the first and second pulse counters and summed by the input of the second reverse 0 is the counter, the output of the latter is connected to the third input of the recorder, and the second input of the Second discretely tunable frequency divider is connected to the output of the second decoder. Sources of information taken into account in the examination 1. USSR author's certificate No. 748156, cl. G 01 M 1/22, 1977 (protyp.).