1999 Fiscal Year Final Research Report Summary
End-Scope-Type Laser Speckle Strain/Damage Inspection System Using Optical Fiber
| Project/Area Number |
09555032
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Materials/Mechanics of materials
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
OGURA Keiji Graduate School of Engineering Science, Osaka university, Professor, 基礎工学研究科, 教授 (70029007)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ICHIHARA Muneaki Mitsubishi Cable Industry LTD, Researcher, 研究員
KIDA Katsuyuki Graduate School of Engineering Science, Osaka university, Research assistant, 基礎工学研究科, 助手 (00271031)
NISHIKAWA Izuru Graduate School of Engineering Science, Osaka university, Associate Professor, 基礎工学研究科, 助教授 (90189267)
|
|---|
| Project Period (FY) |
1997 – 1999
|
| Keywords | Laser Speckle / Damage / Strain / Rigid Translation / Rigid Rotation / 4 Sensor / End-Scope-Type |
|---|
| Research Abstract |
Important issues on the development of an end-scope type laser speckle strain/damage monitoring system are both to minimize a laser light path and to extract an out of plane component in the rigid translation.
In the laser speckle measurement, a laser light path needs approx. 300mm at least. Thus the mirror reflection technique was developed to compact the system size.
The extraction of the rigid translation was achieved by the development of 4sensor laser speckle strain measurement system. In 4-sensor system, four sensors were set on the inclined line with an angle of 45 deg. Horizontal and vertical speckle displacements in each sensor were available to extract and distinguish all translation and rotation components and normal strains and shear strain. Furthermore, the same technique was applicable to the one sensor system by using an area division method with one sensor.
Using the above techniques, it was found that the principle of the end-scope type speckle sensor was accomplished and completed.
|
