カラマツ生立木の非破壊腐朽診断: 応力波測定法と打診法の比較

Translated title of the contribution: Non-destructive diagnosis of wood decay in larch trees: comparison between a stress-wave velocity measurement and a sounding test using a hammer

小林 元, 古賀 信也, 田代 直明, 大崎 繁, 山内 康平, 鍛治 清弘, 内海 泰弘, 岡野 哲郎

Research output: Contribution to journalArticlepeer-review

Abstract

Theaccuracy of two methods of non-destructively detecting wood decay in living trees was compared, a stresswave velocity measurement and a sounding test using a hammer. Measurements were conducted on trees in a 53-year-old Larix kaempferi stand. In both measurements, the accuracy of detecting wood decay in living trees increased as the percentage of decayed diameter in the total diameter of the trunk increased. The accuracy of detecting decayed trees by stress-wave measurement was higher than that of the sounding test when the decayed diameter exceeded 30 percent of the trunk diameter. However, both measurements yielded low accuracy when less than 30 percent of the trunk diameter was decayed. The stress-wave velocity varied greatly even in sound trees, and this decreased the accuracy of the detection by stress-wave measurement, especially in trees, which were less decayed.
Translated title of the contributionNon-destructive diagnosis of wood decay in larch trees: comparison between a stress-wave velocity measurement and a sounding test using a hammer
Original languageJapanese
Pages (from-to)9-12
Number of pages4
Journal樹木医学研究
Volume11
Issue number1
Publication statusPublished - Jan 31 2007

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