Flaw Detection on a Tilted Particleboard by Use of the Spec-Radiation Method

Applied Sciences

Jens Twiefel¹  AndreasSebastian Schmelt¹ 

[1] Institute of Dynamic and Vibration Research, Leibniz University of Hannover, 30823 Garbsen, Germany;

关键词: spec-radiation;    angular spectrum;    flaw detection;    acoustic holography;    tilted particleboard;   

DOI  :  10.3390/app10238513

来源: DOAJ

【 摘 要 】

Herein, we present a novel approach to the spec-radiation method (a method of acoustical holography) for determining the sound distribution on a tilted particleboard by calculating a single plane and rotation in the frequency domain. The tilted particleboard allows testing without standing waves between the transmitter and the particleboard. This eliminates the need to evaluate several parallel planes and to search for values belonging to the tilted particleboard. The numerical requirements can be optimally exploited through a combination with a flaw detectability enhancement method. The results are supported by experiments on a wooden particleboard with flaw imitations. Finally, we showed, through a comparison with the usual procedure of identifying a flaw (calculating many parallel planes and then selecting the data belonging to the tilted plane), that the calculation of the tilted plane is up to 98.5% faster and improves the detectability of flaws in a tilted particleboard.

【 授权许可】

Unknown