SU1211611A1 - Method of determining sound velocity - Google Patents

Abstract

The invention relates to a measurement technique and can be used to determine the speed of sound in solids and liquids. The aim of the invention is to improve the accuracy. In a device that implements the method of determining the speed of sound, the third generator of radio pulses is excited by the second generator, which operates in the External start mode from the first generator. The third generator excites the ultrasonic transducer. An ultrasonic pulse propagating in the sample is reflected from the end of it and is picked up by an ultrasonic transducer, from the output of which the signal is fed to the input of a broadband amplifier operating in the Video Impulse mode. The amplified pulse is fed to the input of an oscilloscope, which is synchronized by a delayed signal from the first oscillator. The transit time of the sound pulse through the sample is determined by measuring the time interval between the and maxima of the first and second reflected pulses as measured by the delay block of the first generator. 1 il. (LC in 5 a

Description

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The invention relates to a measurement technique and can be used to determine the speed of sound in solids and liquids.

The aim of the invention is to increase the accuracy.

The drawing shows a device that implements a method for determining the speed of sound.

The device contains serially connected first generator 1j second generator 2, which operates in External start mode from the first generator 1, third generator 3 radio pulses and ultrasonic transducer 4, radiating an ultrasonic pulse into sample 5, in addition connected in series with broadband amplifier 6, the input of which is connected to the output of the ultrasonic transducer 4, and the oscilloscope 7, the second input of which is connected to the second output of the first generator 1.

A device that implements the method of determining the speed of sound works as follows.

The third generator 3 radio pulses is excited by a second generator 2, which operates in External start mode from the first generator 1. The third generator 3 excites an ultrasonic transducer 4, which emits an ultrasonic pulse.

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which, propagated in sample 5, is reflected from the end of the latter and is received by ultrasonic transducer 4, from the output of which the signal is fed to the input of broadband amplifier 6 operating in the Video Impulse mode. The amplified pulse is fed to the input of the oscilloscope 7, which is synchronized by a delayed strap from the first generator I. The transit time of the sound pulse through the sample 5 is determined by measuring the time interval between the h-maxima of the first and second reflected pulses as measured by the delay unit ( not shown in the drawing) of the first generator 1.

Claims (1)

Invention Formula The method of determining the speed of sound, which consists in emitting ultrasonic pulses into the sample under study and accepting the impulses passing through the sample under test, which, in order to increase the accuracy, separate the first and second reflections from the end of the test. sample pulses, the fixed and -th maxima of the first and second reflected pulses by which the time interval is measured, and taking into account the length of the sample under study, the desired parameter is determined. .G.Ryzhakova composer Editor M.Tsitkina Tehred S.Migunova Proofreader M.Demchik Order 634/47 Circulation 508 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Branch 111111 Patent, Uzhgorod, Projecto st., 4