MULTILAYER PIEZOELECTRIC TRANSDUCER AND METHOD OF ITS ASSEMBLY Russian patent published in 2022 - IPC H01L41/47 H04R1/44 

FIELD: hydroacoustics.

SUBSTANCE: invention relates to the field of hydroacoustics, namely to the design of broadband piezoceramic transducers. Layers of a multilayer piezoelectric transducer, consisting of a given number of prepared piezoceramic layers of the same shape, assembled into a transducer body, for example, by sintering at high temperature, with a pair of prepared contacts for each layer connected in parallel and connected to a power source, are cut from a flexible piezoelectric film in the form a figure consisting of a given number of areas of the same shape, provided with small protrusions and jumpers along the assembly line, in this case, the upper end surface of the transducer body coincides with the surface of the first one, and the lower end surface coincides with the last of the areas assembled into the transducer body in the form of a glued folded structure - "accordion", with kinks at the jumpers, and the power source is connected directly to the poles of the extreme protrusion of the cut out figures. The manufacturing process of a multilayer piezoelectric transducer provides for the preparation of a given number of transducer layers by cutting out from a single sheet of a flexible piezoelectric film a figure consisting of such a number of areas corresponding to the shape of the end surface of the transducer body, equipped at the edges with small protrusions and jumpers along the assembly line, and the assembly of the body of the transducer is carried out by folding the surface of the figure with an "accordion" from the regions of the film from the first to the last, bending the figure at the points of the jumpers, gluing the regions at room temperature and keeping under pressure to displace excess glue from the interlayer space, after which the poles of the cut out figure on the extreme ledge are connected directly to the power source.

EFFECT: creation of a multilayer piezoceramic transducer that provides operation in the emission and reception mode in a frequency band of at least an octave with the required frequency response unevenness when exposed to high hydroacoustic pressure and at the same time achieves the impedance of the transducer comparable to the impedance of the surrounding aquatic environment.

2 cl, 4 dwg