ULTRASONIC INCLINED TRANSDUCER FOR MEASURING SPEED OF PROPAGATION OF ACOUSTIC WAVES IN STEEL ROLLING PRODUCTS WHEN DETERMINING PARAMETERS OF MECHANICAL PROPERTIES, WHICH CHARACTERIZE COLD RESISTANCE Russian patent published in 2020 - IPC G01N29/04 

FIELD: physics.

SUBSTANCE: use to determine speed of propagation of acoustic waves in various solid materials in structures, such as gas pipelines, oil pipelines, reservoirs and other critical metal structures, without interruption of their operability. Essence of the invention consists in the fact that in an electrically-driven inclined transducer for measuring speed of propagation of acoustic waves in steel rolling products comprises inclined transducers, comprising prisms consisting of four main working elements, two bases, one waveguide, piezoelectric element in the form of a ring with a central hole and a base mounted on a flat surface, having in the central part a small paraboloidal mirror, by means of which maximum concentration of acoustic energy is provided, second prism base is made in form of large paraboloidal mirror, central part of which has the shape of an elongated waveguide for directing acoustic waves generated by the piezoelectric cell to a large paraboloidal mirror, from which acoustic waves are focused towards a small paraboloidal mirror, wherein focal spots of both mirrors are combined into one point, whereby acoustic waves are aligned, uniformly directed to a waveguide having a diameter equal to the diameter of the central hole of the piezoelectric cell.

EFFECT: possibility of narrowing the acoustic field directivity pattern without loss of energy, low probability of passage of the acoustic field through sections which occur during rolling of the steel article with high anisotropy, where the energy of the acoustic pressure drops minimally.

1 cl, 1 dwg