| タイトル | Optical strain measurement system development, phase 1 |
| 本文（外部サイト） | http://hdl.handle.net/2060/19870013527 |
| 著者（英） | Lant, Christian T.; Qaqish, Walid |
| 著者所属（英） | Sverdrup Technology, Inc. |
| 発行日 | 1987-05-01 |
| 言語 | eng |
| 内容記述 | A laser speckle, differential strain measurement system was built and tested for future applications in hostile environments. One dimensional electronic correlation of speckle pattern movement allows a quasi-real time measure of strain. The system was used successfully to measure uniaxial strain reaching into plastic deformation of a test specimen, at temperatures ranging to 450 C. A resolution of 16 microstrain is given by the photodiode array sensor pitch and the specimen to sensor separation. The strain measurement limit of the gauge is determined by air density perturbations causing decorrelation of the reference and shifted speckle patterns, and may be improved by limiting convective flow in the immediate vicinity of the test specimen. |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 87N22960
E-3550
NAS 1.26:179619
NASA-CR-179619 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/150592 |
