DOI: https://doi.org/10.15587/1729-4061.2019.186150

Design of automated solutions to detect flaws in plywood

Olha Baranova, Mykola Vasylenko, Konstantin Shevchenko, Yuriy Tsapko, Oliinyk Rostislav, Andrii Yeroshenko

Abstract


It has been determined that the most expedient and economically beneficial flaw detection method for plywood is the impact method. Samples of plywood with and without a defect were used for the research. Among the acoustic techniques, the most accurate is considered to be ultrasound; its implementation, however, requires that the surface of plywood should be treated with a special substance, which makes the method impractical for plywood raw materials. Nevertheless, given the accuracy of the method, we have performed a correlation analysis involving the impact method. The chosen initial parameters for the shock method were the number of pulsations, the oscillation frequency and the coefficient of harmonic distortions of a shock sensor's signal. The ultrasound study has been found to produce almost identical results with previous experiments, especially regarding a harmonic distortion coefficient (Kh=0.84). This allows us to argue that the selected parameters make it possible to reliably detect a defect in plywood. Solutions for automating the flaw detection process have been suggested. A device has been designed to control quality and to enable the automated selective sorting of plywood, as well as a multichannel automated quality control system for plywood to be installed at a production line. The proposed systems would make it possible to perform the automated flaw detection in plywood, both in the form of finished products and at the production stage. Information on the quality of plywood can be transferred both to workers at a warehouse and to a transportation robot, as well as to a production line in order to run an analysis and identify causes of defects and to correct the technological process parameters. Automating the flaw detection process would improve its speed and accuracy. We have proposed an easy-to-use relative criterion of plywood quality, which makes it possible to eliminate measurement errors caused by instability in the plywood oscillation amplitude at a sensor's impact. That makes it possible to significantly improve the accuracy of detecting internal defects in the non-destructive quality control

Keywords


plywood; flaw detection; impact method; selective sorting; non-destructive testing; quality control

References


Pinchevska, O., Smirdriakova, M. (2016). Wood particleboard covered with slices made of pine tree branches. Acta Facultatis Xylologiae Zvolen, 58 (1), 67–74.

Skliar, D., Smirdriakova, M., Sedliacik, J. (2017). Selected physical and mechanical properties of plywood faced with wood slices. Acta Facultatis Xylologiae Zvolen, 59 (1), 97–105. doi: http://doi.org/10.17423/afx.2017.59.1.09

Bal, B. C., Bektaş, İ., Mengeloğlu, F., Karakuş, K., Ökkeş Demir, H. (2015). Some technological properties of poplar plywood panels reinforced with glass fiber fabric. Construction and Building Materials, 101, 952–957. doi: https://doi.org/10.1016/j.conbuildmat.2015.10.152

Bekhta, P., Salca, E.-A. (2018). Influence of veneer densification on the shear strength and temperature behavior inside the plywood during hot press. Construction and Building Materials, 162, 20–26. doi: https://doi.org/10.1016/j.conbuildmat.2017.11.161

Aydin, I., Demirkir, C., Colak, S., Colakoglu, G. (2016). Utilization of bark flours as additive in plywood manufacturing. European Journal of Wood and Wood Products, 75 (1), 63–69. doi: https://doi.org/10.1007/s00107-016-1096-0

Zauner, M., Keunecke, D., Mokso, R., Stampanoni, M., Niemz, P. (2012). Synchrotron-based tomographic microscopy (SbTM) of wood: development of a testing device and observation of plastic deformation of uniaxially compressed Norway spruce samples. Holzforschung, 66 (8), 973–979. doi: https://doi.org/10.1515/hf-2011-0192

Susainathan, J., Eyma, F., De Luycker, E., Cantarel, A., Castanie, B. (2018). Experimental investigation of impact behavior of wood-based sandwich structures. Composites Part A: Applied Science and Manufacturing, 109, 10–19. doi: https://doi.org/10.1016/j.compositesa.2018.02.029

Aro, M. D., Brashaw, B. K., Donahue, P. K. (2014). Mechanical and Physical Properties of Thermally Modified Plywood and Oriented Strand Board Panels. Forest Products Journal, 64 (7-8), 281–289. doi: https://doi.org/10.13073/fpj-d-14-00037

Mori, M., Hasegawa, M., Yoo, J.-C., Kang, S.-G., Matsumura, J. (2016). Nondestructive evaluation of bending strength of wood with artificial holes by employing air-coupled ultrasonics. Construction and Building Materials, 110, 24–31. doi: https://doi.org/10.1016/j.conbuildmat.2016.02.020

Marhenke, T., Neuenschwander, J., Furrer, R., Twiefel, J., Hasener, J., Niemz, P., Sanabria, S. J. (2018). Modeling of delamination detection utilizing air-coupled ultrasound in wood-based composites. NDT & E International, 99, 1–12. doi: https://doi.org/10.1016/j.ndteint.2018.05.012

Golovach, V. M., Baranova, O. S. (2016). Analiz koreliatsiyi parametriv vykhidnoho syhnalu udarno-akustychnoho ta ultrazvukovoho metodiv defektoskopiyi fanery. Sovremennye stroitel'nye konstruktsii iz metalla i drevesiny, 20, 27–31.

Golovach, V. M., Baranova, O. S. (2015). The Analysis of the Influence of Plywood Defect Specifications on the Amount of Output Ripple of Shock Sensor. Naukovyi visnyk NLTU Ukrainy, 25.10, 280–285.


GOST Style Citations








Copyright (c) 2019 Olha Baranova, Mykola Vasylenko, Konstantin Shevchenko, Yuriy Tsapko, Oliinyk Rostislav, Andrii Yeroshenko

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

ISSN (print) 1729-3774, ISSN (on-line) 1729-4061