SU1221586A1 - Multielement piezoelectric converter - Google Patents

Abstract

The invention relates to the field of non-destructive agents and control methods and can be used for ultrasonic inspection of products. The aim of the invention is to improve the technological design of a multi-element piezoelectric transducer. An electrical pulse from the flaw detector generator is alternately applied to the electrodes of the piezoplates, which excite ultrasonic vibrations in the body of the prism. The grooves and gaps between the piezoplates allow discrete emitting and receiving ultrasonic signals. The tight fit of piezoplates to the metallized layer minimizes losses during the transition of ultrasound into the prism body. The latter, besides improving the manufacturability of the structure, makes it possible to increase the sensitivity of the control. 3 il. (/)

Description

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The invention relates to non-destructive tools and methods of control and can be used for ultrasonic inspection of products.

The purpose of the invention is to improve the technological design of a multi-element piezoelectric transducer.

FIG. 1 shows a schematic of the multi-element transducer of FIG. 2 — section A-A of FIG. 1 n figo 3 - node I in fig 1 o

The multi-element transducer contains an acoustic prism 1, a dielectric gasket 2 with a metallized layer 3, grooves 4 made in it, piezoplates 5 and a conductive damper 6c fixed to them. The grooves 4 are made along the width of the gap between piezoplates with a depth greater than the thickness of the metallized layer. The working electrodes of piezoplates 5 are soldered to the metallized layer 3, and on the opposite side are connected to a common current-conducting damper, made of an alloy with a high specific gravity. A clamp 8 is provided for fastening the current-carrying wires 7. The soldering of the wires 7 is carried out on the metallized layer 3,

The multi-element piezoelectric transducer operates as follows.

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An electrical impulse is alternately applied to the electrodes of the piezoislin 5, which excites ultrasonic vibrations in the body of the prism 1. Grooves 4

5 and the gaps between the piezoplates 5 allow discrete signals to be received and received by the ultrasonic signals. The tight fit of the piezoplates to the metallized layer minimizes losses during ultrasound transfer to the prism body, which also makes it possible to increase the sensitivity of the control.

Thus, the presence of a dielectric strip with a metallized 15th layer made it possible to improve the manufacturability of the design of a multi-element converter and to increase the sensitivity of the control.

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Claims (1)

Invention Formula A multielement piezoelectric transducer containing an acoustic prism, piezoplates with electrodes attached to it, and a damper, characterized in that, in order to improve the manufacturability of the design, it is equipped with a dielectric pad installed between the prism and piezoplates with a metallized layer in contact with the piezoplates and shafts in contact with the projectile plates. slots across the width of the gap between piezoplates and with a depth greater than the thickness of the layer, and the damper is conductive. Put. g (rig. 3 fig 2 Compiled N.Slyusarenko Editor M.Dshyn Tehred V.Kadar Corrector V.But ha Order 1607/51 Circulation 778 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, d, 4/5 Branch PPP Patent, Uzhgorod, Proektna St., 4