Variable angle ultrasonic transducer for shear waves
AssigneeVideoson Limited
InventorDonald Orr Sproule
Life of this patent
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Abstract
An ultrasonic probe for generating shear waves in a test piece, having a liquid-filled cell housing a transducer. The cell has a window for application to the test piece and the transducer is pivotable to provide variable angle of wave incidence at the window. An external scale, calibrated in angle of refraction of resultant waves in the test piece, permits of pivoting the transducer for the corresponding angle of incidence by way of a mechanical linkage. For a given wave velocity for a known test piece material (steel and aluminium is chosen) and for a given liquid filling, the linkage geometry is predetermined. Reflected energy within the cell is attenuated by bristle bundles.
Claims10
An ultrasonic probe, particularly for non-destructive testing of a test piece of known material by generation of ultrasonic shear waves therein, comprising a liquid-retaining cell containing an immersed ultrasonic transducer, the cell having a window in a wall thereof, for placing on a surface of the test piece, the said transducer being mounted for angular movement substantially about a centre located at the cell window, whereby ultrasonic energy is transmitted through the said window to generate shear waves in the said test piece, an attenuating medium being provided within the cell to attenuate reflected ultrasonic waves therein, a settable scale and pointer combination, said scale being graduated directly in units related to angle of refraction of said shear waves in the test piece and a mechanical linkage for providing an angular positioning of the transducer according to said scale and pointer setting.
Dependencies are inferred from the claim text.