SU1225019A1 - Device for measuring logarithmic decrement - Google Patents

Abstract

This invention relates to a measurement technique. Increases measurement accuracy. On the leading edge of the input pulse, the trigger (T / 1) is reset, and the signal from the 1st output T 1 opens the key / K / 2 to pass the pulse transient function (IAP), represented as voltage. Formed by the amplifier-shaper 3 of the positive and negative. IAP half-wavelengths The rectangular pulses are differentiated by the differentiation of chain 4, the series of pulses with which tn

Description

It counts at the input of the impulse counter. It 3, which transfers T 1 as it finishes, passing through the Scheme will put it and deny it. full of IAP, and from the 2nd output T 1 a signal is sent to the 2nd input K 8 about the resolution on the voltage divider 9 delimiting the amplitude maximum value, the half-wave, the selected amplitude. The invention relates to measurement technology, automation and can. be used in any industry where the measurement of the damping factor of structures is required.

The purpose of the invention is to increase the measurement accuracy.

The drawing shows a structural electrical circuit of the device for measuring the logarithmic damping factor.

The device for measuring the logarithmic damping decrement contains a trigger 1, the first key 2, the amplifier-former 3, the differentiating circuit 4, the pulse counter 5, the second amplitude detector 6, the first amplitude detector 7, the second key 8, the voltage divider 9, the logarithm unit 10, the unit registration P. I.

The device works in the following way,,.

At the first input of trigger I, an input pulse x (t) is applied, the leading edge of which sets trigger 1 to the initial state, and the signal from the first output of trigger 1 opens the first key 2 to pass the pulse transition function co (t), represented as voltage . Amplifier-shaper 3 forms, from a positive and negative half-wave of a 1-pulse transition function, pulses that are close in shape to legitimate ones. Differentiating circuit A differentiates rectangular pulses arriving at its input and feeds a series of pulses to the input of pulse counter 5, which flips trigger 1 as soon as it ends.

225019

by the detector 6, the amplitude maximum value will be negative. half-wave, selected by the amplitude detector 7, the output signal of the voltage divider 9 is logarithmized in the logarithm unit 10 and then the signal; . enters the recording unit 11 for recording. 1 silt

passing through the scheme of positive and negative half-waves of the impulse response ,.

The output of the first key 2 is also connected to the common input of the amplitude detectors 6 and 7 dp, highlighting the maximum of the positive and negative half-waves. As soon as the signal from the output of the pulse counter 5 transfers trigger 1, the second output of trigger 1 sends a signal to the second input of the second key 8 about resolving the division of the amplitude of the positive half-wave by the amplitude of the negative half-wave on divider 9, the signal from the divider 9 output is logarithmized in the block logarithm 10 and then the signal goes to the recording unit AND to record,

Formula a-, inventions

5 A device for measuring logar 4 decay decrement, containing a pulse counter, a first switch and a booster amplifier, characterized in that, in order to improve the measurement accuracy, a trigger is introduced, one input of which is an input of a pulse signal and the other input connected to the output of the pulse counter, the first amplitude detector, a differentiating circuit, includes 35 on between the output of the amplifier-former and the input of the pulse counter, serially connected to the second amplitude detector, second key, divider eg logging unit and logging unit, the first output of the trigger is connected to the first

thirty

J12250194

the input of the first key, the second input of the k-th and second amplitude detectors,

Secondly, it is the signal input to the output signal of the first amplitude detector.

pulsed transition function in the video is connected to the first input of the second

voltage, and the output is connected to the input key, the second input of which is connected

give the amplifier the former, the first-second output of the trigger.

Claims (1)

A device for measuring the logarithmic attenuation decrement, containing a pulse counter, a first switch and a driver amplifier, characterized in that, in order to improve the measurement accuracy, a trigger is introduced, one input of which is an input of a pulse signal, and the other input is connected to the output of a pulse counter, the first an amplitude detector, a differentiating circuit connected between the output of the amplifier-driver and the input of the pulse counter, connected in series with a second amplitude detector, a second switch, a voltage divider, Lok logarithms and recording unit, the first latch output is connected to the first 122.5019 the input of the first key, the second input of which is the pulse signal of the transition function in the form of a voltage, and the output is connected to the inputs of the amplifier-former, the first and second amplitude detectors, the output of the first amplitude detector is connected to the first input of the second key, the second input of which is connected 5 s second trigger output. Compiled by V. Smirnov Editor L. Povhan Tehred V. Kadar Corrector A. Obruchar Order 1969/59 Circulation 624 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5