3S7a: (20 min.) Case Study – Improvement of fault diagnosis for bearing by means of broadband ultrasound

Peter Holstein, Strategic Development, SONOTEC Ultraschallsensorik Halle GmBH


Current standard ultrasound instruments enable users the access to relatively simple parameters such as level measurements by means of narrow-band sensors and analogue electronics. This limits the informative value of ultrasound technology since the most physical processes generate ultrasound in a broad frequency range. The limitation of narrow frequencies prevents fails in some cases because of changed frequency distributions. Frequency variations are caused by changed operation, wear of surfaces and consequently of the friction, fluid turbulences and other. The extension of the accessible frequency – enabled by means of a new sensor technology – provides (in combination with advanced signal processing) improved detection of faults and unusual operation conditions.
The improved ultrasound technology will exemplified for roller bearings with increasing amount of damage.


Prof. Dr. Peter Holstein, born in 1956, received his degree in Physics in 1982 and his Dr. rer. nat. from the University in Leipzig. As researcher in Polymer Physics and Nuclear Magnetic Resonace, he was working in Leipzig and on some postdoc positions in Prague, Durham(UK)(DFG scholarship 1994/95- visiting R.K. Harris) and Tokyo (The Centenary Grant 2000″ des Tokyo Institute of Technology) and publishing many articles in that fields.
After working for some years as head R&D in a company for acoustical measurement equipment, he founded a Steinbeis-Transferzentrum (STZ “Technical Acoustics and applied Numerics”) in 2005.
In 2004, he became a Honorary Professor for “Technical Acoustics” at the Technical University of Ilmenau (Germany), where he is teaching several subjects around acoustics, materials and signal processing.
Project work on materials at the Fraunhofer Gesellschaft , 2006-07,  extended his expertise to material mechanics.
In 2008, he joined the company “Ultraschallsensorik Halle GmbH”, where he is heading the Strategic Development of the Company.
He is currently working on topics such as applications of state-of-the-art signal processing, sensor applications (mainly ultrasonics) and technical acoustics.