Development of Tomographic Technology (Case Study: Trees from Karaj City)

Roohnia, Mehran; Jahanlatibari, Ahmad; Behnam, Behzad; Zarrinmehr, Jamshid; Kohantorabi, Mostafa; Manouchehri, Negin; Tajdini, Ajang

doi:10.22092/ijwpr.2017.115825.1441

Document Type : Research Paper

Authors

¹ Professor, Department of Wood and Paper Science and Technology, College of Agriculture and Natural Resources, Karaj Branch, Islamic Azad University, Karaj-Iran

² Department of Electrical Engineering, Faculty of Engineering, Karaj Branch, Islamic Azad University, Karaj-Iran.

³ Employee, Karaj Branch, Islamic Azad University, Karaj, Iran

⁴ Ph.D Student, Department of Wood and Paper Science Islamic Azad University, Science and Research Branch, Hesarak, Poonak, Tehran, Iran

⁵ Invited researcher, Karaj Branch, Islamic Azad University, Karaj, Iran

⁶ Associate Professor, Department of Wood and Paper Science and Technology, College of Agriculture and Natural Resources, Karaj Branch, Islamic Azad University, Karaj, Iran

https://doi.org/10.22092/ijwpr.2017.115825.1441

Abstract

Reaching to the technology of acoustical Tomography and imaging, this project was ordered for facilitating the work for green space researchers and managers in urban standing trees. Comparing the sensors and micro-second timers with those of a certified European device in radial to tangential and longitudinal directions showed a good agreement for the Iranian made device. So, a new horizon was opened for the researchers of this approach supported by the local scientific knowledge and technology. Holding this technology, the selected trees concerning the collar defect symptoms were firstly inspected visually, then the visual accuracy was monitored by sonic tomography. Some trees were extremely defected internally, while the visual inspection showed their intactness (9 from 23). Meanwhile some trees holding visually defect signs were proved to be intact after carrying the tomography images (up to 10 from 53). It is concluded that the visual tree defect inspection is not satisfactory for saving or omitting the individual and these kinds of decision makings must be supported by the methods showing the hidden discontinuities.

Keywords

Main Subjects

Physics and Mechanical Wood

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Iranian Journal of Wood and Paper Science Research

Development of Tomographic Technology (Case Study: Trees from Karaj City)

References

References

Volume 33, Issue 1 - Serial Number 62
April 2018
Pages 100-111

Development of Tomographic Technology (Case Study: Trees from Karaj City)

References

References

Volume 33, Issue 1 - Serial Number 62April 2018Pages 100-111

Volume 33, Issue 1 - Serial Number 62
April 2018
Pages 100-111