The Spec-Radiation Method as a Fast Alternative to the Re-Radiation Method for the Detection of Flaws in Wooden Particleboards

Applied Sciences

卷:10

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;    re-radiation;    Rayleigh-Sommerfeld;    flaw detection;   

DOI  :  10.3390/app10196663

来源: DOAJ

【 摘 要 】

For real-time evaluation of non-destructive air-coupled ultrasonic testing of wood-based materials, efficient and reliable calculation methods from ultrasonic holography are essential. Presented here is the spec-radiation method as a fast alternative to the re-radiation method. The spec-radiation method offers a more accurate and up to 88% faster evaluation than the re-radiation method for the determination of flaws in particleboards. Flaws of sub-wavelength sizes can be identified and their shape and location can be determined with this method. The spec-radiation method produces a better reproduction of the sound field than the re-radiation method, especially in the area of the measuring plane.

【 授权许可】

Unknown