SU627602A1 - Acoustic transducer - Google Patents

Description

one

The invention relates to instrument making and MO / KET bytis used in electroics.

An actual converter is known, which contains a main transducer element, around which the auxiliary transducer elements 1 are located.

Closest to the invention, but a technical entity is an acoustic transducer containing electrically insulated central and ring transducer elements with leads 2 installed electrically insulated from one another in a housing with a lid.

A disadvantage of the known devices is the narrow functionality, such as with the help of these devices, it is not possible to determine the direction of the acoustic signal.

The aim of the invention is to determine the direction of arrival of acoustic co

The goal is achieved by providing an acoustic transducer. ring foot acoustic cabinets, ibi, i, M, i, M with dimensions, 11, and of the same decrease at the same time but height and IHH and located between the mentioned central and ko, transform transducer diameters.

FIG. 1 shows two projections of the acoustic transducer, 1; FIG. 2, yuglot, 1 acoustic ko, teban in two projections; in Fig. 3, the example of a subcontour of an acoustic image of the images will be transferred to the e, 1ect) block.

The acoustical acoustic transducer is installed in a brass casing 1 two,

for example, piezoelectric, ring-shaped transforming element elements 2, surrounding the center, 1th transforming element 3, alternating, for example, in the form of concentrically mounted co, 1ts and 1 and Ts11,1indra, Converting elements 2

Claims (2)

 and 3 are isolated e, spectrically and equipped with individual leads. Between the piezoelectric elements 2 and 3 is installed nototite, 1 acoustic oscillations 4, on top of the box 1 is covered with a lid of conia0 soyunhego impedance of the material 5, Absorb, 1b of acoustic oscillations 4 is, for example, ns, cn, equally reasonable | s) around the circumference. Dimensions of io1-, t () titels of acoustic cabinets are chosen based on the range; received frequencies of acoustic emission signals and signal amplitudes. The outputs of the first and second piezoelectric rings and interconnects to the inputs of the two-channel amplifier b, the first output of which is directly, and the second through the delay line 7 for a time equal to the acoustic signal passing from one ring to another, respectively, are connected to the first and second inputs of the two-channel meter 8 peak amplitude values, followed by their conversion to discrete values. The outputs of the meter 8 are connected to the divider 9 discrete amplitude values. The divider 9 is connected to a reversible counter 10 discrete values, and a simulator 11 simulating discrete values of pulses equal to 1x angle unit 1, ° 00, is connected to the third input of the divider 9. The output of counter 10 is connected via a decider 12 to a digital indicator 13 A discrete acoustic emission signal with a frequency of, for example, 25 kHz-1 mHz, is fed to one piezoelectric ring, converted into an electrical signal and fed to the first input of a two-channel amplifier 6, then the acoustic signal passes an acous absorber oscillations in which the signal attenuates depending on the direction of arrival (maximum attenuation, for example, 1.7 times). Then, by a certain amount of weak (depending on the angle of arrival), the sigal reaches the central piezoelement, the electric signal is converted, which is amplified in amplifier 6. The amplified signals from amplifier 6 also help through the delay line 7 external piezoelectric co. to zeitra.1nomu piezoelectric ring, simultaneously received at the first and second input of the corresponding two-channel meter 8 peak values am.litud, with a conversion of them in di the secret values that are divided in the splitter 9. The dividers from splitter 9, the values of which correspond to the angle of arrival of acoustic emission signals, are described on the counter 10 by a simulator 11 that generates discrete values of pulses equal to the unit yr.ia in 1 °. The counter 10 is decoded in the decoder 12 and the indicator 13 is output. The construction of the acoustical transducer is derived from the Iredlozdeina. It allows to extend the functionality of the device. Claims. An acoustic transducer containing electrically insulated central and co-transducer elements with terminals installed in a housing with krzik, characterized in that, in order to determine the direction of the acoustic oscillations, it is sabenz the ring acoustic cone of acoustic KO.ie, made with size.mi. gradually decreasing at the same time in height and width and between the base and center and ring transducers and elements. Sources of information taken into account in examination 11 () 11 examination: 1. Patent CIUA L. 3858439. cl. H 04 R 17/00, 1975. 2. US patent jYo 3513439, cl. H 04 R 17/00, 1972. 2 s . one