Electrodynamic ultrasonic transformer

US4452086A · kind A · utility

Assignee

• Nukem, LLC · DE

Inventors

• Gerhard Huschelrath · Laufach, DE
• Karl Laudenbach · Gießen, DE

Key dates

• Filing date: Oct 20, 1981
• Grant date: Jun 5, 1984
• Expiry date: Oct 20, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N29/2412
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electrodynamic ultrasonic transformer, having at least one exciting coil and one receiving coil, for use in ultrasonic nondestructive material testing in order to reduce the dead times and to remove or, respectively, minimize negative influences occurring during the measuring of different test piece material and at distance variations without adversely affecting the signal/noise ratio. Those parts of the exciting coil and/or receiving coil designed for current conducting are preferably made of resistance material which is suitable for structural elements embodying electric resistors, and which material will not essentially obstruct the current flow during the exciting phase of the current, and after termination of the excitation will rapidly reduce the energy stored in stray and coupling fields.