SU1416904A1 - Ultrasonic transducer - Google Patents

Abstract

The invention relates to the field of non-destructive agents and methods of control and can be used for ultrasound testing of products with complex surface relief. The aim of the invention is to increase the sensitivity of the transducer due to the quality of acoustic contact. The ultrasonic transducer contains N piezoplates placed parallel to one another at an angle to the working surface. This reduces the distance between the magnet and the product, and therefore, the quality of the acoustic contact is improved, thereby increasing the sensitivity of the transducer. 1 il.

Description

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The invention relates to non-destructive tools and methods of control and can be used for ultrasound testing of products with complex surface relief.

The aim of the invention is to increase the sensitivity of the transducer by improving the quality of the acoustic contact.

The drawing schematically shows an ultrasonic transducer.

The Converter includes a housing 1, an acoustic waveguide 2, fixed P

where C

 2 b-tgc / (n-1) C5B

ten

jg - the speed of sound in the material

prism.

Under the action of electrical oscillations in piezoplates 3, ultrasonic vibrations are excited, which are transmitted through acoustic waveguide 2 and magnetic fluid 6 into product 7. Ultrasonic vibrations reflected from a defect again fall on piezoplates 3, are converted into electrical oscillations and in the same way.

Piezoplates of 3 and M-j sequences fixed on it and with the same time 4 installed above them. Shift piezome 2 arrives at the receiver plate installed parallel to the single-flaw detector. Blabdar zoomed out on another at an angle o / k working-. the surface of the transducer 5 and the biased gap between the magnet 4 and the working surface of the transducer increased P

where C

 2 b-tgc / (n-1) C5B

jg - the speed of sound in the material

prism.

Under the action of electrical oscillations in piezoplates 3, ultrasonic vibrations are excited, which are transmitted through acoustic waveguide 2 and magnetic fluid 6 into product 7. Ultrasonic vibrations reflected from a defect again fall on piezoplates 3, are converted into electrical oscillations and in the same way.

sequences and with the same shift time 2 arrive at the detector of the flaw detector. Blabdar decrease

the gap between the magnet 4 and the working surface of the transducer is

relative to extreme piezoplates

s - -b- (-

N cos a

where L is the total length of piezoplates N is the total number of plates; h is the serial number of the piezoplate.

As acoustic fluid. Magnetic contact fluid 6 is used, which is held between the transducer and the product by a magneti 4. i

. The converter works as follows.

in a way.

The converter is installed with a working surface on the test article 7, onto which magnetic contact liquid 6 has been previously applied. Electrical oscillations from the flaw detector generator (not shown) are successively fed to piezoplates 3 of the converter with a shift in time, for example, by

The holding capacity of the magnet 4 is improved, the quality of the acoustic contact is improved, and hence the sensitivity of the converter increases.

Claims (1)

Invention Formula An ultrasonic transducer comprising a housing, an acoustic waveguide located in it with a piezoelectric plate mounted on it and installed Above it is a magnet, characterized by the fact that, in order to increase sensitivity, it is. equipped with N-1 piezoelectric plates, piezoplates are installed parallel to each other at an angle of 0 to the working surface of the converter and shifted relative to the extreme piezoplates to the distance S determined by the ratio 40 about b (p-1) NCOS d where L is the total length of piezoplates; n is the number of a piezoplattine. / /.