Measurement of Structural Vibration Through Video Images

• Grant number: 09/16072-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2010
• End date: January 31, 2011
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Rodrigo Nicoletti
• Grantee: Andre Luiz Dutra
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Structural mechanical vibration is commonly measured through punctual sensors, i.e. sensors that measure the structural behavior at only one point. Examples of such sensors are accelerometers, LVDTs, non-scanning laser vibrometers, and proximity probes. This project aims at developing an acquisition system able to measure the dynamic behavior of a structure as a whole (many points) using only one sensor: a video camera. After video image acquisition, the vibration at specific points of interest is obtained by computer post processing, adopting image processing techniques. The objective is to develop a system able to measure orbits and operational modes of a rotating system in operation.