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The Authors

Per Bennich, Ph.D.

Dr. Bennich is the chairman of ISO TC 213 "Dimensional and geometrical product specifications and verification - GPS," the technical committee responsible for the standards covered in this book. He has held this position since the Technical Committee was started in 1996. From 1993 to 1996 he was the Chairman of the precursor to ISO TC 213, ISO/TC 3-10-57/JHG "Joint Harmonization Group" for geometrical product specifications (GPS). He has participated in international standardization since 1980.

Dr. Bennich received a M.Sc. in Mechanical Engineering in 1970 and a Ph.D for a thesis on metal forming in 1975 from the Technical University of Denmark in Copenhagen.

From 1973 to 1990 Dr. Bennich was the Manager of the Branch for Mechanical Processing of Materials at IPU, the Institute for Product Development, a private consulting company located at the Technical University of Denmark.

In 1990 Dr. Bennich started his own consulting business, PB Metrology Consulting, specializing in:

- Engineering metrology, calibration and testing of measuring equipment and products
- Quality assurance of industrial measurement and calibration
- Certification and accreditation
- GPS Dimensioning and tolerancing on engineering drawings.

He teaches public seminars on all of these subjects through various organizations as well as customized in-house company seminars. Over the last 10 years he has taught GPS in 3-4 day public and company specific seminars to more than 1000 people from over 20 companies.

From 1980 to 1999 Dr. Bennich taught a 300 hour curriculum in geometrical metrology for industrial metrologist students (an 18 month associate program) at the Slagelse Technical College.

Dr. Bennich is also the founder and chairman of The Danish Society for Engineering Metrology - FVM (founded 1982). The Society has 700 member companies from Denmark and other Scandinavian countries. The society puts on 3 one day symposia each year.

Henrik S. Nielsen, Ph.D.

Dr. Nielsen has been an expert serving on ISO TC 213 "Dimensional and geometrical product specifications and verification - GPS," and related committees since 1988.

Dr. Nielsen has served as project leader and main author of several ISO standards on subjects such as Surface Finish, Form, and Uncertainty Concepts.

He was the convenor of TC 213 Working Group 1, “Roundness, Straightness, Flatness, and Cylindricity” until it was disbanded when the standards were submitted for publication. He is currently the convenor of TC 213 Advisory group 11, "Underlying Concepts."

Dr. Nielsen received a M.Sc. in Mechanical Engineering in 1984 and a Ph.D. in Metrology in 1988 from the Technical University of Denmark.

From 1987 to 1991 he worked as a consulting engineer at IPU, the Institute for Product Development in Copenhagen.

From 1991 to 1998 Dr. Nielsen was the Technical Manager of Corporate Standards at Cummins Engine Co. in Columbus, Indiana, USA.

Dr. Nielsen started his own consulting business HN Metrology Consulting in 1998 and in 2001 he started HN Proficiency Testing (the first accredited proficiency testing provider catering to calibration laboratories in the United States).

Dr. Nielsen’s areas of expertise include dimensional and geometrical metrology, uncertainty estimation, and quality assurance for calibration laboratories. He teaches public seminars on all of these subjects through various organizations as well as customized in-house company seminars. Since 1999 over 1500 students have attended his seminars.

Dr. Nielsen is a Lead Calibration Assessor for A2LA, the American Association for Laboratory Accreditation, and has assessed over 100 dimensional calibration and testing (inspection) laboratories since 1999.
 

The Translators

Prof. Xiangqian (Jane) Jiang (Chinese)

Prof. Jiang is an active member of ISO TC 213 “Demensional geometrical product specification and verification – GPS”. She is an expert member of BSI Technical Committee (TDW/4), and is an advice member of China (SAC/TC240). She is a project leader on several ISO standards on surface texture and filtration.

Prof. Jiang has been involved in science research of surface metrology for more than 15 years, following 14 years working in geometrical metrology in the automotive industry. She has published more than 120 papers and 2 co-author books.

Prof. Jiang is a “Yangzi Professor” awarded by the Ministry of Education P.R. China since 1999. She now holds a chair of precision metrology at University of Huddersfield UK and she is also a special professor at Huazhong University of science and technology, China.

Prof. Jiang MSc and PhD works were closely related to the research and development of areal surface measurement instruments and techniques. She received her PhD degree in surface metrology at Huazhong University of science and technology. Her PhD dissertation "Theory and method for measurement of curved surface topography" obtained by the Chinese Government for what was considered the best doctoral dissertation during the 1990s.

Prof. Jiang main research interests are innovation of new theory and applied techniques in surface nanometrology, including: exploration of novel measurement principles and instruments (optical measurement principles, sensor design and optical-electronic signal processing); Creation of mathematical models and algorithms for surface analysis and characterisation (form fitting, filtration, wavelet theory and parameter assessment).

John Westberg (Swedish)

John Westberg, with a long experience in design and manufacture at Volvo Car Co, has been involved in national and international GPS standardisation for over 40 years.

He is currently chairman of SIS technical committee TK 284 " Geometriska Produktspecifikationer" and convenor of ISO/TC213 WG16 " Areal and Profile Surface Texture ".

Since his retirement from VCC he is running his own consulting business, Metrology West, specializing in Geometrical Product Engineering.
 

Julius Köhler (German)

Marian Sáenz Nuño (Spanish)

© Institute for Geometrical Product Specifications 2004