کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4759180 1421111 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Review of the use of air-coupled ultrasonic technologies for nondestructive testing of wood and wood products
ترجمه فارسی عنوان
بررسی استفاده از فن آوری های اولتراسونیک هوا همراه برای آزمایش غیرمخرب محصولات چوب و چوب
کلمات کلیدی
اولتراسونیک با هواپیما، محصول چوب و چوب، خصوصیات غیر انسانی، تشخیص نقص،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی


- Wood property measurement and defect detection have been summarized.
- ACU parameters are highly influenced by wood properties and defects.
- Signal and image processing methods improve the quality of ACU signals or C-scan images.
- Computer simulation and statistical methods aid to compensate for the background variation.
- Imaging speed is an obstacle to industrial application.

Air-coupled ultrasonic (ACU) is a contactless ultrasonic measurement method which has become increasingly popular for material characterization. This is due to a growing number of advanced materials which cannot be contaminated during the testing processes by coupling agents utilized in conventional ultrasonic testing. This paper provides a review of the applications of ACU to wood and wood products. The ACU fundamentals, including principles, working modes and commercial transducers used for this purpose, is briefly described. The emphasis of this paper is on approaches of inspection and characterization. The applications of ACU to wood characterization with reference to wood quality aspects are summarized. Correlations between the ACU parameters (i. e. amplitude, velocity, and spectrum) and the wood properties (i.e. density, moisture content, strength, and stiffness) as well as the wood defects (i. e. knots, cracks, decay, insect damage, and delamination) are dealt with in detail. Finally, a discussion of apparent future research directions completes this review.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers and Electronics in Agriculture - Volume 137, May 2017, Pages 79-87
نویسندگان
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