Publication result detail

Measurement of Material Properties Using Deterministic White Noise

CARBOL, L.; KUSÁK, I.; MARTINEK, J.

Original Title

Measurement of Material Properties Using Deterministic White Noise

English Title

Measurement of Material Properties Using Deterministic White Noise

Type

Paper in proceedings (conference paper)

Original Abstract

This paper describes a comparison of two acoustic non-destructive methods for measurement of Young's modulus of axially vibrating bars made of various metals. The first method is a classical impact-echo with frequency analysis and the second method is based on deterministic white noise MLS generator. Both methods give comparable results but excitation by white noise appears to be more sensitive and can reveal higher harmonics which would otherwise be damped very quickly. Another advantage of white noise is the possibility of continuous automated measurement. On the other hand, the transducer fixed at the specimen presents an added mass which lowers the frequencies and this effect must be taken into account.

English abstract

This paper describes a comparison of two acoustic non-destructive methods for measurement of Young's modulus of axially vibrating bars made of various metals. The first method is a classical impact-echo with frequency analysis and the second method is based on deterministic white noise MLS generator. Both methods give comparable results but excitation by white noise appears to be more sensitive and can reveal higher harmonics which would otherwise be damped very quickly. Another advantage of white noise is the possibility of continuous automated measurement. On the other hand, the transducer fixed at the specimen presents an added mass which lowers the frequencies and this effect must be taken into account.

Keywords

MLS, Impact-echo, Young modulus, White noise, Impulse response, Linear time-invariant system

Key words in English

MLS, Impact-echo, Young modulus, White noise, Impulse response, Linear time-invariant system

Authors

CARBOL, L.; KUSÁK, I.; MARTINEK, J.

RIV year

2017

Released

09.10.2014

Publisher

Vysoké učení technické v Brně

Location

Praha

ISBN

978-80-214-5018-9

Book

XIth European Conference on NDT

ISBN

1435-4934

Periodical

The e-Journal of Nondestructive Testing

Volume

2014

State

Federal Republic of Germany

Pages from

1

Pages to

7

Pages count

7

BibTex

@inproceedings{BUT111023,
  author="Ladislav {Carbol} and Ivo {Kusák} and Jan {Martinek}",
  title="Measurement of Material Properties Using Deterministic White Noise",
  booktitle="XIth European Conference on NDT",
  year="2014",
  journal="The e-Journal of Nondestructive Testing",
  volume="2014",
  number="1",
  pages="1--7",
  publisher="Vysoké učení technické v Brně",
  address="Praha",
  isbn="978-80-214-5018-9",
  issn="1435-4934"
}