Ultrasonic Scanning for Pallet Part Grading
نویسندگان
چکیده
Sorting and grading of wooden pallet parts are key factors for pallet manufacturing quality and pallet durability. The feasibility of ultrasonic scanning for defect detection in pallet manufacturing is examined in this report. Scanning was conducted by two pressure-contact rolling transducers in a pitch-catch arrangement. Pallet part deckboards were fed through the transducers and data were collected, stored, and processed with software written in the LabViewTM environment. Defects were characterized on the basis of time of flight, pulse energy, and pulse duration of the received ultrasonic signals. Values of the ultrasonic parameters changed rapidly in the region of defects. This relative change of parameter values with respect to values for clear wood can be used to locate, identify, and quantify various pallet part degrades. Results demonstrate that real-time, on-line inspection of wooden pallet parts is possible by ultrasonic scanning.
منابع مشابه
Ultrasound Pallet Part Evaluator/grader and Cant Scanner
Sorting and grading of wooden pallet parts are key factors for manufacturing quality and durable pallets. The feasibility of ultrasonic scanning for defect detection and classification has been examined in this report. Defects, such as sound and unsound knots, decay, bark pockets, wane, and holes were scanned on both red oak (Quercus rubra, L.) and yellow-poplar (Liriodendron tulipifera, L.) pa...
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Ultrasonic scanning experiments were conducted for detecting defects in wood pallet parts using rolling transducers. The characterization of defects is important for sorting and grading pallet parts, as well as for manufacturing quality and durable pallets. This paper reports the scanning results for stringers and deckboards – the two main components of pallet for red oak and yellow-poplar spec...
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Mark Schafer President and Principal Scientist, Sonic Tech Wayne, PA This paper presented the results of several years of testing the use of ultrasound to find structural defects in pallet parts and pallet cants used to produce pallet parts. To determine the magnitude of unsound defects, we inspected full length cants from seven saw mills from Virginia and West Virginia. Split, wane, shake, hol...
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Millions of wooden pallets are discarded annually due to damage or because their low cost makes them readily disposable. Higher quality wooden pallets, however, can be built from high quality deckboards and stringers, and have a much longer life cycle and a lower cost per trip. The long-term goal of this project is to develop an automated pallet part inspection system to sort pallet parts accor...
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