SU1297796A1 - Tone transducer - Google Patents

Abstract

This invention relates to medical technology and is intended to indicate Korotkoff tones. The purpose of the invention is to reduce non-uniformity. amplitude-frequency response. The sensor consists of body 1, clamps 2 with a central hole 3, a piezoelement 4, a metal gasket 5, a pelota 6, an elastic cuff 7. The sensor is installed under a compression cuff. Sound vibrations occurring in the tissues are perceived by the pilot 6 and converted by the piezoceramic element 4 into electrical signals. 4 il. 9g.1

Description

JO

11297796

The invention relates to a medicamental technique and is intended to indicate Korotkoff tones when measuring blood pressure by the method of Korotkov,

The purpose of the invention is to reduce the non-uniformity of the amplitude-frequency characteristic by attaching a metal plate to the piezoceramic element, the thickness of which is from 0.6 to 1.6 times the thickness of the piezoceramic element.

FIG. 1 shows the sensor section; in fig. 2 - connection diagram of the piezoelectric element; in fig. 3 - dependence of the sensor sensitivity increase factor on the plate thickness; in fig. 4 shows the dependence of the sensor sensitivity increase factor on the internal diameter of the plate orifice made of aluminum and a textolite of the same thickness.

The sensor consists of a housing 1, a cover 2 with a central hole 3, a piezoelectric element 4, a metal gasket 5, a pelota 6, an elastic cuff 7.

Sensor tones Korotkov works as follows.

15

20

25

cuff pressures are sensed by the pilot 6 and converted by the piezoceramic element 4 into electrical signals.

The use of the invention allows to increase the sensitivity and reduce the non-uniformity of the amplitude-frequency characteristic of the sensor of Korotkov tones, which leads to an improvement in quality and a decrease in the cost of the sensor.

Claims (1)

Invention Formula containing the coronal tones sensor, pus, keying version, a piezoceramic element located in the housing parallel to the collar and connected with the edges through the elastic cuff, a pilot fixed in the center of the piezoelectric element and placed in the hole so that its front side is flush with the outer surface of the lid, characterized in that , in order to reduce the non-uniformity of the amplitude-frequency characteristic, the sensor is provided with a metal plate, attached, The sensor is installed under the compressed to the piezoceramic element. Zionic cuff on the inner side of the plate: it is not possible to forearm. Sound vibrations, from 0.6 to 1.6 times the thickness of piezoceramic, occur in tissues when the cickel element changes. cuff pressures are perceived by the pilot 6 and converted by the piezoceramic element 4 into electrical signals. The use of the invention allows to increase the sensitivity and reduce the non-uniformity of the amplitude-frequency characteristic of the sensor of Korotkov tones, which leads to an improvement in quality and a decrease in the cost of the sensor. Invention Formula containing the coronal tones sensor, pus, keying version, a piezoceramic element located in the housing parallel to the collar and connected with the edges through the elastic cuff, a pilot fixed in the center of the piezoelectric element and placed in the hole so that its front side is flush with the outer surface of the lid, characterized in that , in order to reduce the non-uniformity of the amplitude-frequency characteristic, the sensor is provided with a metal plate; pe VT + and. P. 2 "Al 3JO 2.5 2.0 15 TO, 0.1 0.2 aJ O.CH 0.5 0.6 b, mm Fig.Z 2.5 15 Aluminum . MM W1520 Fy Editor N. Tupitsa Compiled by G. Denisov Tehred A. Kravchuk Proofreader G. Reshetnik Order 835/3 Circulation 596 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 Production and printing company, Uzhgorod, st. Project, 4 25 thirty