Low-frequency harmonic vibration analysis with temporal speckle pattern interferometry

✍ Scribed by Xide Li; Gang Tao

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 544 KB
• Volume: 34
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(02)00013-0

✦ Synopsis

In this paper, the time sequence phase method (TSPM) has been applied to measure the displacement caused by low-frequency vibration in temporal speckle pattern interferometry (TSPI). The principle is that by capturing the temporal speckle patterns related to the object vibration, the whole-ÿeld displacement responses (amplitude and phase) of the vibrating object can be calculated through scanning these uctuations. Thus, quantitative measurement can be carried out using a conventional ESPI system without a camera synchronized to the object vibration or a phase shifting system. The elaboration on the method is given and experimental results are presented.