SU1244502A1 - Method of measuring velocity of ultrasound in substance layer - Google Patents

Abstract

This invention relates to a measurement technique and can be used to measure the speed of ultrasound in layers of a substance. The aim of the invention is to expand the functionality. In the method of measuring the velocity of ultrasound, ultrasonic pulses reflected normally from the layer interface are emitted and received with a combined ultrasonic transducer, the propagation time of the latter is measured. The angle of input of the emitted ultrasonic pulse is changed with a given angular velocity j}. The time interval between the moments of reception of ultrasonic signals by the first and second receiving transducers is measured, over which, taking into account the time of ultrasound propagation at normal input, the angular velocity and distances. between the combined first and second receiving converters, the desired parameter is determined. 1 pe. i (About SP N3

Description

i

The invention relates to measurement techniques and can be used to measure the speed of ultrasound in layers of matter.

The purpose of the invention is the extension of 5 functionality.

The drawing shows the device,. The analysis is a method of measuring the speed of ultrasound in a layer of matter.

A device that implements the speed measurement method U contains a combined ultrasonic transducer 1 located on the surface of the test layer 2 and connected to the output of the generator (not shown in the drawing 5) and the input of the measuring unit (shown in the drawing Ie). The first 3 and second A receiving ultrasonic transducers are installed one behind the other on the surface of the controlled 20 layer 2 on the same ori with the combined ultrasonic transducer 1.

A device that implements a method for measuring the speeds of ultrasound in a layer of a substance works as follows.

I Radiate and accept with a combined ultrasonic transducer 1 the reflection reflected normally from the border. The case of layer 2 is ultrasound pulses and it measures the time t of propagation of the latter. The angle of input of the emitted ultrasonic pulse is changed with a given angular velocity tJ. Measured within 24 hours of time & t between the time a} -1I receive ultrasonic sig-. first 3 and second 4 receiver converters, according to which, taking into account the propagation time of ultrasound at normal input, the angular velocity 01 and the distance between the combined 1 and 1 first 3 converters, the first 3 and the second

1244502 - 2

The 4 receiving converters and the combined 1 and second receiving 4 converters 1 and 4 (D, A and B) determine the required parameter from the expression:

25

35

one

bz

and t - -. arctg

(2tA h l + BD§ (

),

where l-ct./2;

C is the target propagation velocity of ultrasound.

Claims (1)

Formula inveni.ni The method of measuring the speed of ultrasound in a layer of a substance, which consists in emitting and receiving a combined ultrasonic transducer reflected normally from. The ultrasonic pulse interfaces measure the propagation time of the latter, characterized in that, in order to expand the functionality, on the ultrasound input surface, the first and second secondary ultrasonic transducers are mounted next to each other on the same axis as the combined transducer. radiated ultrasonic pulse with a given angular velocity, measure the time interval between the moments of reception of ultrasonic signals by the first and second receiving transducers, o-, taking into account the propagation time of ultrasound when the normal input angular speed and distances between the transducers is determined by the desired parameter. one bz - -. arctg (2tA h l + BD§ ( ), where l-ct./2; C is the target propagation velocity of ultrasound. Formula inveni.ni The method of measuring the speed of ultrasound in a layer of a substance, which consists in emitting and receiving a combined ultrasonic transducer reflected normally from. The ultrasonic pulse interfaces measure the propagation time of the latter, characterized in that, in order to expand the functionality, the first and second secondary ultrasonic transducers are placed one after the other on the same axis with the combined transducer, the angle of entry of the emitted ultrasonic pulse with a given angular velocity, measure the time interval between the moments of reception of ultrasonic signals by the first and second receiving transducers, TO- considering the propagation time of ultrasound in the normal input, the angular velocity and the distances between the transducers is determined by the desired parameter. Compiled by G. Ryzhakov Redakch-or L. Veselovska Tehred V. Kadar Proofreader, M. Dömchik Order 3906/44 Circulation 507 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Subscription