SU1337053A1 - Ultrasonic transducer for investigating biological media - Google Patents

Abstract

This invention relates to an acoustic measuring technique. For / not increasing the accuracy of examining soft biological tissues on small samples, the device contains a piezo transducer 1, a delay line 2 in the form of a body of rotation with a ribbed side surface, an axially symmetric recess on the free end of the delay line 2 in the form of a cone 3 with a truncated top and a matching according to the diameter of its apex of cylinder 4, cap 5 with an internal axisymmetric cylindrical protrusion 6, a circular vernier scale 7 and a thread 8 on the inside for articulation with a delay line 2. 1 il. (/ from 00 oh 00

Description

113

The invention relates to an acoustic measuring technique and can be used in medicine in the study of the biological environment, such as soft and fluid tissues of the body.

The purpose of the invention is to increase the accuracy of the study of soft biological tissues on small samples.

The drawing shows a schematic representation of an ultrasound transducer for studying biological media.

The ultrasound transducer for studying biological media contains a piezoelectric transducer |, a delay line 2 in the form of a body of rotation with a ribbed side surface and an axisymmetric recess on the free end, in the form of a cone 3 with a truncated tip and a cylinder 5 coupled along the diameter of its tip, 5 with the internal axisymmetric cylindrical projection b by the scale of the circular vernius 7 on its outer part and 8 on the internal dp of the junction with the line 2 of the delay. The side surface of the delay line 2 can be made in the form of a thread 9.

An ultrasound transducer for the examination of biological media works as follows.

When measured on small samples of soft tissues while removing the cap 5, a small sample of the soft tissue under study (not shown) is placed in the recess of the cone 3 lines 2 delays. On line 2, delays are slowly screwed on cap 5, which, with its cylindrical protrusion 6, tightly, but without the nap-ush, of the sample structure, presses the latter to the base of cylinder 4, creating an acoustic contact over the entire area of this QCHO-- the sample changes shape and fills the entire space of cylinder 4. The resulting acoustic length of cylinder 4 is counted according to the indications of a circular nonius 7,

Piezo transducer 1 emits a beam of ultrasonic oscillations in line 2 of the delay. Ultrasonic vibrations of the central part of the beam, falling normally on the base of cylinder 4 ,,

vniipi

Order 4068/5 Circulation 594

Prepaid

Production polygr, pr-tie, Uzhgorod, st. Project, 4

The material of the delay line 2 is reflected from the boundary — the medium under study and returned to the piezoelectric transducer 1 and then, as an electrical signal, is fed to measuring equipment (not shown), by which the characteristics of the medium under study are determined by the ultrasound reflection method. A part of the ultrasonic oscillations incident normally on the base of the cylinder 4 of the delay line 2, enters the cylinder 4 and, reflected from the flat part of the cylindrical protrusion 6, rotates to the piezoelectric transducer 1 and then enters the measuring equipment (not shown) as an electrical signal. , with the help of which the characteristics of the studied medium are determined by the method of transmission, ultrasound, supplementing those determined by the method of reflection of ultrasound.

Ultrasonic vibrations of the edge part of the beam, falling 1e onto the lateral threaded surface 9 of the delay line 2, are effectively dissipated.

Similarly, an ultrasonic transducer is used in the study of small volumes of liquid biological media without; using cap 5. Ultrasonic vibrations of only the central part of the beam are used to determine the characteristics of the liquid by ultrasound reflection.

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formula of invention

40

An ultrasound transducer for biological analysis, containing a 1st piezoelectric transducer, an end acoustically connected with it, a delayed line in the form of a body of rotation with a ribbed side surface and an axisymmetric recess on a free end in the form of a cone with a truncated 5 vertex and conjugated in diameter

its cylinder tops

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In order to improve the accuracy of the study of soft biological tissues on small samples, a cap with an internal axisymmetric cylindrical protrusion, a scale of a circular vernius on its outer part and a thread on the inner has been introduced for articulation with a delay line with free butt.

Prepaid

Claims (1)

Claim An ultrasonic transducer for studying biological media, • containing a piezoelectric transducer, an acoustically connected end-face delay line in the form of a body of revolution with a ribbed lateral surface and an axisymmetric recess on the free end in the form of a cone with a truncated 45 vertex and mating in diameter of its cylinder-apex, different in order to increase the accuracy of research on soft biological tissues on small samples, an additional cap is introduced with an axisymmetric inner cylindrical protrusion pom, a scale of a circular nonius on its external part and a thread on the internal for articulation with the delay line from the free end. VNIIIPI Order 4068/5 Circulation 594 ____ Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4