Pulse-echo method for determining the damping block geometry

US8739630B2 · kind B2 · utility

Assignee

• GE Sensing & Inspection Technology · DE

Inventors

• York Oberdoerfer · Nümbrecht, DE
• Michael Berke · Carle Place, US
• Wolf-Dietrich Kleinert · Bonn, DE
• Jerome Poirier · Les Ulis, FR
• Sascha Schieke · Greer, US

Key dates

• Filing date: Sep 7, 2009
• Grant date: Jun 3, 2014
• Expiry date: May 8, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N29/32
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a nondestructive ultrasonic test method in which at least one ultrasonic pulse is emitted into a workpiece under test by means of at least one ultrasonic transmitter (3), the ultrasonic pulse is reflected on boundary surfaces within the workpiece, the reflected ultrasound is received by at least one ultrasonic receiver (2), and the associated signals are evaluated, the ultrasound penetrating a damping block (4) that is arranged between the workpiece and the transmitter or receiver. Said method is characterized in that it includes at least one step for determining at least one dimension (alpha, d1, d2) of the damping block (4) that is relevant for the ultrasonic test; in said step, the propagation time of at least one ultrasonic pulse which is generated by the ultrasonic transmitter (3), is reflected on a boundary surface (5) of the damping block (4), and is received by the ultrasonic receiver (2) is measured, and at least one dimension (alpha, d1, d2) of the damping block (4) that is relevant for the ultrasonic test is determined from said measurement.