SU1522059A1 - Apparatus for measuring disbalance - Google Patents

Abstract

This invention relates to a balancing technique. The purpose of the invention is to improve accuracy by reducing the error caused by the unevenness of rotation. The digitized unbalance signal from the output of the analog-to-digital converter 6 enters the multiplexer 17, and then through the register 8, triggered by the delay element 15, to the first input of the transmitter 10, where it is recorded during one revolution. Then, after the next sync pulse arrives, the generator 2 switches the computer 10 into the information processing mode through a counting trigger 13. The unbalance amplitude is determined by the maximum element of the recorded array, the phase by the ratio of the number of negative and positive elements of the array and the number of the maximum element. The phase determination resolution is set by the pulse generator 12. 2 Il.

Description

ycTpoftctBo relates to balancing technology and can be used for balancing rotating parts, assemblies and mechanisms.

The purpose of the invention is to improve the accuracy by reducing the error caused by the uneven rotation.

Fig, 1 shows a block diagram of the device; FIG. 2 shows the algorithm of the operation of the calculator.

The device contains an unbalance meter 1, a sync pulse generator 2, an electronic pulse generator 3 connected in series, a programmable divider 4, an AND-digital converter trigger input (A1SCH) 6, whose information input is connected to the output of an imbalance meter 1, the first trigger 7 , register 8, readiness block 9, calculator 10, the first and second inputs of which are connected respectively to the outputs of register 8 and readiness block 9, and the second input to the corresponding input of a programmable case Ill 4, indicator 11, whose input is connected to the first output. Calculator 10j pulse generator 12, the output of which is connected to the S input of the first trigger 7, counting trigger 13, the input of which is connected to the output of the sync pulse generator 2, and output to the second input of the circuit 5 I. and the third input of the calculator 10, the second trigger 14,) the input ijoToporo is connected to the output of the first trigger 7, the delay element 15, the input of which is connected to the C input of the second trigger t4 and the synchronizing output of the ADC 6, and the output with R-input of the first trigger 7, C-inputs of the register 8 and the input of block 9 availability, block 16 inverters and multiplexer 17, the first information input of which is connected to the information output of the ADC 6 and the input of the block 16 inverters, the second information input - with the output of the last, the address input - with the output of the second trigger 14, and the output - with the D input of the register eight.

The unbalance meter 1 can be performed, for example, on the basis of a contactless inductive converter, which measures relative oscillations (vibrations) of the balancing object during its rotation in the supports: amplification of the vibration signal

from Q 5 5 0

0

five

five

and filtering, in order to isolate a component corresponding to the frequency of rotation of the object. The sync pulse generator 2 can be executed, for example, in the form of a contactless inductive measuring transducer, producing a sync pulse when the mark applied to the balancing object passes through the working zone of the sensor. The pulse generator 3 can be made, for example, on the basis of an IC 155 AHP, an analog-to-digital converter 6 in the form of an A / D converter K1113 PV1A, a calculator 10 - based on microelectronics Electronics-60, or on the basis of any microprocessor-based data processing system. Indicator 11 is a typical output device, for example, a LED display panel or a printing device, such as a Consul-256 type electric recorder. The pulse generator 12 can be made, for example, in the form of a disk mechanically connected with a rotating balanceable body, having n holes for forming the pulses using a photosensor. Digital elements - AND circuit 5, first trigger 7, register 8, readiness block 9, counting trigger 13, second trigger 14, delay element 15, inverter block 16 and multiplexer 17, can be implemented, for example, on the basis of typical digital integrated circuits 133, 155,

tei, etc. . . .

The device works as follows. .

When turned on, the calculator 10 sets the division factor for programmable divider 4, the input of which receives a signal from the generator of 3 electronic pulses. The signal from the output of the programmable divisor 4 is fed to the first input of the AND 5 circuit. At the moment of passing the mark applied to the rotating balancing body, the generator 2 of sync pulses p1 1 pulses the first pulse that arrives at the input of the counting trigger 13, at the output of which a single level signal is generated arriving at the second input of the circuit And 5 and allowing the flow of signals from the output of the programmable divider 4 to the start input of the ADC 6. The second input of the ADC 6 receives an analog signal from the output of the unbalance meter 1. After converting the signal from the output of the unbalance meter 1 into a digital form, the A / D converter 6 generates an information signal and a synchronization signal. The information signal is fed to the first information input of the multiplexer 17 and through the block 16 inverted. To the second information input of the multiplexer 17. When a pulse is generated by a generator of 12 pulses, a single level signal is generated at the output of the first trigger 7 and is fed to the information input of the second

pulses, i.e. A single shaft rotation is recorded in the memory. At the same time, the negative elements of this array indicate that at the given moment of time the generator of 12 pulses worked. To calculate the unbalance vector, the calculator tO finds the maximum element of the recorded array (the negative elements are then inverted), which corresponds to the amplitude of the unbalance erector. To calculate the phase, the calculator 10 determines how much

trigger 14, the signal from the output of which J5 elements of the array before the found macro-access to the address input of the multiplexer 17. Information output of the multiplexer 17 is connected to the information input of the register 8. readiness, to the synchronizing input of the register 8 and to the input of zeroing the first trigger 7. The delay element 15 delays the passage of the synchronizing signal for the time necessary for the arrival of information the ion signal to the input of the register 8. After the information and synchronization signals are inserted, the ADC 6 starts up. The start frequency is determined by the frequency of the signal at the output of the programmable divider 4. At the output of the ready block 9, the Ready signal is generated, which is fed to the second input of the calculator 10, information from register 8 is recorded in the internal operative memory of the calculator 10. At the moment of the second passage of the mark deposited on the rotating balancing body through the generator of 2 sync pulses, it is formed in The second pulse that arrives at the input of the counting trigger 13, at the output of which a zero-level signal is formed, which closes the incoming signals from the output of the AND 5 circuit and sends to the third input of the calculator 10. By this signal, the calculator 10 proceeds to processing information located in internal RAM. In the internal operative memory of the calculator 10, the data array i is found corresponding to the unbalance signal. Moreover, the first and the last elements of the array are formed at the moment the generator 12 triggers.

The maximum values are negative and calculates the angle V, according to the formula:

V К ©

20

where K is the number of negative elements to the maximum, € 1 is the angle through which the generator of 12 pulses produces pulses. Next, the calculator 10 determines the operands N (and N ,, and calculates the angle V by the formula:

/ l

N,

N + N,

0

where n /

N.

the number of elements of the written array between the maximum element and the first negative element before it, the number of elements of the written array between the maximum element and the first negative element after it.

Next, the transmitter 10 calculates the phase H by the formula:

tVi

, and displays on the indicator 11 the measurement results. Moreover, if the indicator 11 is implemented, for example, in the form of a printing device or a recorder, then the device allows you to display the entire array, i.e. allows to obtain the distribution of the magnitude of the imbalance signal in angular and temporal coordinates. Further, the operation of the device is repeated as described.

Thus, the use of a pulse generator that generates pulses through a discrete angle of rotation of the shaft, and further formation

the codes of the unbalance value, as well as the calculation of the phase by the calculator, can significantly reduce the error arising due to the unevenness of the rotation of the object.

In addition, the proposed device makes it possible to obtain not only the unbalance vector itself, but also the distribution of the unbalance magnitude in angular and temporal coordinates.

Formula of invention

Device for measuring imbalance - containing connected unbalance meter and analog-to-digital converter, serially connected electronic pulse generator, programmable divider and AND circuit, the output of which is connected to the trigger input of the analog-digital converter, sync pulse generator, first trigger, register, readiness block, indicator and calculator, the first and second inputs of which are connected respectively to the outputs of the register and readiness block, and the first and second outputs with

the indicator input and the corresponding programmable divider input, characterized in that, in order to increase accuracy, it is equipped with a pulse generator, the output of which is connected to the S input of the first trigger, a counting trigger, the input of which is connected to the output of the clock generator, and the output to the second input And the third input of the calculator, the second trigger, the D input of which is connected to the output of the first trigger, the delay element, the input of which is connected to the C input of the second trigger and the synchronous output of the analog-digital the converter, and the output - with the R-input of the first trigger, the C-input of the register and the input of the ready block, the inverter unit and the multiplexer, the first information input of which is connected to the information output of the analog-digital converter and the input of the inverter unit, the second information input - with the last , the address input is with the output of the second trigger, and the output is the t D input of the register.

Claims (1)

Claim An imbalance measuring device, comprising an imbalance meter and an analog-to-digital converter connected in series, an electronic pulse generator, a programmable divider and an I circuit whose output is connected to an analog-to-digital converter trigger input, a clock generator, a first trigger, a register, a ready unit , an indicator and a computer, the first and second inputs of which are connected respectively to the outputs of the register and the ready unit, and the first and second outputs - with the input of the computer, the second three a gaher whose D-input is connected to the output of the first trigger, a delay element 15, the input of which is connected to With the input of the second trigger and with the synchronizing output of the analog-to-digital converter, and the output with the R-input of the first trigger, the C-input of 20 registers and the input of the ready unit, the inverter unit and the multiplexer, the first information input of which is connected to the information output of the analog-digital the converter and the input of the inverter unit, the second information input with the output of the latter, the address input with the output of the second trigger, and the output with the D-input of the register. F & .1