Assessment of deterioration in timbers with time and frequency domain analysis techniques

Christopher Adam Senalik; Lujing Zhou; Robert J. Ross

Treesearch

Assessment of deterioration in timbers with time and frequency domain analysis techniques

Informally Refereed

Authors:

Christopher Adam Senalik, Lujing Zhou, Robert J. Ross

Year:

2017

Type:

Paper

Station:

Forest Products Laboratory

Source:

In: Wang, X.; Senalik, C.A.; Ross, R.J., eds. Proceedings, 20th international nondestructive testing and evaluation of wood symposium. Gen. Tech. Rep. FPL-GTR-249. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 298-310.

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Abstract

The research reported here focuses on the use of time and frequency domain analysis techniques for assessing the internal condition of timbers. Several large timbers obtained from a historic public viewing tower were evaluated with acoustic-based nondestructive testing techniques. Waveforms were captured and analyzed using both time and frequency domain techniques. The slope of the phase with respect to frequency shows potential to be a metric that is more sensitive to the presence of internal decay than time of flight.

Keywords

Timber, deterioration, acoustic signals, time domain, frequency domain, phase

Citation

Senalik, C. Adam; Zhou, Lujing; Ross, Robert J. 2017. Assessment of deterioration in timbers with time and frequency domain analysis techniques. In: Wang, X.; Senalik, C.A.; Ross, R.J., eds. Proceedings, 20th international nondestructive testing and evaluation of wood symposium. Gen. Tech. Rep. FPL-GTR-249. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 298-310.