Method and apparatus for locating material defects in hollow bodies

US4453410A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Hans-Peter Schmitz · Mönchengladbach, DE
• Bernard Schleper · Oberhausen, DE

Key dates

• Filing date: Jun 14, 1983
• Grant date: Jun 12, 1984
• Expiry date: Jun 14, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E30/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An ultrasonic probe is positioned within a hollow body such as a pipe for detecting possible flaws in the body wall. The probe is designed for rotational and longitudinal movement in said pipe and includes an ultrasonic transmitter/receiver mounted eccentrically within a liquid filled chamber of the probe, so that transmitted impulses strike the inner wall of the pipe at such an angle that the angle of refraction of the sound wave in the material of the wall is always less than 90.degree..