Laser-scanning structural health monitoring with wireless sensor motes

被引：12

作者：

Buckner, Benjamin D. ^{[1
]}

Markov, Vladimir ^{[1
]}

Lai, Li-Chung ^{[2
]}

Earthman, James C. ^{[2
]}

机构：

[1] MetroLaser Inc, Irvine, CA 92614 USA

[2] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA

来源：

OPTICAL ENGINEERING | 2008年 / 47卷 / 05期

基金：

美国国家航空航天局;

关键词：

scanning; sensors; light scattering; nondestructive testing; smart structures; laser applications;

D O I：

10.1117/1.2919793

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A highly compact laser-scanning device that can be used as an in situ detection and monitoring device for metal fatigue is described. A prototype is built on a Mica2 wireless sensor mote platform with TinyOS-based firmware. This device is shown to be capable of detecting fatigue-related changes in the surface bidirectional reflectance distribution (BRDF) of an aluminum test coupon, and detectable changes in BRDF are measured at a very early stage of fatigue development, when no cracks larger than 50 mu m in length have yet developed at the monitored location. The system power requirements are compatible with standard sensor mote architectures such as the Mica and Telos series, enabling the potential for multiyear lifetimes without battery replacement. Such an in situ optical fatigue sensor could be used in a variety of structural health monitoring applications, including aerospace, rail transport, and civil structures. (c) 2008 Society of Photo-Optical Instrumentation Engineers.

引用

页数：9

共 18 条

[1]

Buckner BD, 2005, IEEE SENSOR, P632

[2]

BUCKNER BD, 2005, P SPIE, V5880

[3] Characterization of low-cycle fatigue damage in Inconel 718 by laser light scanning [J].