Stress wave tomography

thumb|Foto na stress wave tomogram nke osisi eucalyptus na ụfọdụ ire ure. A na-egosi osisi dị mma na ụcha nchara. N'aka nri: Nlegharị anya 3D na-egosi oke ire ure.
Acoustic ma ọ bụ nrụgide ebili mmiri tomography bụ usoro nleba anya nke na-adịghị emebi emebi maka ịhụta nguzozi n'ezi ihe nke ihe siri ike. A na-eji ya anwale nchekwa nke osisi ma ọ bụ ihe atụ, dịka ọmụmaatụ. Okwu acoustic tomography na-ezo aka na ụda a na-aghọta nke ọma bụ  caused by the mechanical impulses used for measuring. The term stress wave tomography describes the measurement kpatara site na mkpali igwe eji eji atụ ihe. Okwu nrụgide wave tomography na-akọwa nha Method 

usoro nyocha na-adịghị ebibi ihe maka ịhụ iguzosi ike n'ezi ihe nke ihe siri ike. A na-eji ya nwalee nchekwa osisi si ma ọsimentienti, dịka ọmụmaatụ. Okwu *acoustic tomography* na-ezo aka na ụda a na-ahụ anya nke na-esite na mkpali igwe eji atụ ihe. Okwu ahụ bụ *stress wave tomography* na-akọwa usoro ịlele n'ụzọ ziri ezi.

## Ihe ndị e ji mara ya
Usoro a dabere na ọtụtụ nha nke oge ụgbọ elu nke ebili mmiri nrụgide n'etiti ihe mmetụta nke ejikọtara na grid nnwale abụọ ma ọ bụ atọ. Na acoustic stress wave tomography nke osisi (*lee kwa*: nchọpụta osisi), a na-etinye ihe mmetụta mgbagwoju anya n'otu ma ọ bụ ọtụtụ ụgbọ elu gburugburu ogwe ma ọ bụ alaka ma tụọ ọnọdụ ha. A na-akpali mkpali site na ịpị hama ma na-edekọ oge mbata na sensọ.

Ọsọ mgbasa nke mkpali n'ime ihe siri ike na-emetụta njuputa na Akara aka na modul na-agbanwenke ihe ahụ (*lee kwa*). Mmebi nke dị n'ime, dị ka ire ure ma ọ bụ oghere, na-ebelata mkpali ma ọ bụ na-emepụta ihe mgbochi nke na-eme ka mgbanwe nke mkpali sie ike. Nke a na-eduga n'oge mgbasawanye dị ogologo ma na-akọwa ya dị ka ọsọ dị ala. A na-agbakọ ọsọ nke ụda site na ịkewa obere anya n'etiti ihe mmetụta site n'oge ụgbọ elu n'etiti ha.

Algorithms mgbakọ na mwepụ pụrụ iche na-agbanwe  nke ọsọ n'ime agba ma ọ bụ ihe oyiyi greyscale (tomogram) nke na-eme ka a nyochaa oke mmebi. Nkwupụta nke usoro a na-ejedebe site na ọnụ ọgụgụ nke ihe mmetụta eji eme ihe. Mkpebi ihe oyiyi dị ala karịa X-ray Tomography gbakọọ n'ihi ogologo oge nke mgbaàmà, mana ọ na-ezere nsogbu na radiation dị elu. 

Ngwaọrụ nke ụdị a bụ Arbotom, PiCUS acoustic tomograph na Arborsonic 3D.

## Akwụkwọ

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* Rinn, F. (1999): Vorrichtung zur Materialuntersuchung. / *Ngwaọrụ maka ihe nyocha*. International Patent PCT/DE00/01467 (1999.05.11).
* Rust S.; Göcke, L. (2000): *Ngwaọrụ tomographic ọhụrụ maka nnwale na-adịghị ebibi* nke osisi ndị guzo ọtọ. Na: Ihe omume nke 12th International Symposium on Nondestructive Testing of Wood. Mahadum nke Western Hungary, Sopron, 13-15 Septemba 2000, 233-238.
* Rust, S. (2001): Baumdiagnose ohne Bohren. AFZ - Der Wald 56: 924-925.
* [Ihe e dere n'ala ala peeji]
* Rabe, C., Ferner, D., Fink, S., Schwarze, F. (2004): *Nchọpụta nke ire ure n'osisi nwere ebili mmiri na nkọwa nke* ụda olu. Arborcultural Journal 28 (1/2): 3-19
* Haaben, C., Sander, C., Hapla, F., 2006: *Untersuchung der Stammqualität Sweeder Laubholzarten mittels Schallimpuls-Tomographie*. Holztechnologie 47 (6): 2-5