Electromagnetic ultrasound transducer

US8806949B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventor

• Frank Niese · Saarburg, DE

Key dates

• Filing date: Jul 11, 2011
• Grant date: Aug 19, 2014
• Expiry date: Aug 23, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B06B1/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An electromagnetic ultrasound transducer is disclosed for receiving linearly polarized horizontal shear waves from an electrically conductive workpiece including a magnetizing unit, which provides a side facing the workpiece, along which a number n of permanent magnets are attached in at least two rows arranged next to one another in such a manner that the magnetic polarities of the magnetic poles which face the side alternate along a row periodically with a period length which corresponds to a trace wavelength λs and a HF coil arrangement with conductor sections in at least two rows running parallel to one another, through which current can pass in mutually opposite directions.