Innovative Optical Sensor To Determine Vibration

Umi Hani , Abdul Hamid (2009) Innovative Optical Sensor To Determine Vibration. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

Structural analysis includes localized vibration study of metallic, ceramic and composite structures. This document is to report on the project undertaken to design and develop the vibration sensor to measure the light received during transmission due to vibrations of structures over very small-localized surface area. Optical fiber based displacement is extended as a vibration sensor, based on the consideration that the vibration is a periodic variation of displacement. A fiber optic probe is designed using a well-polished plastic fibers, which ends respectively to each other. One of the fibers is connected to an LED and the other to a photo detector. The probe which is optic fiber cable is placed to the location of the structure where the vibration is to be measured. The vibration causes intensity changes to the light received at the photo detector. Experimental studies were carried out to optimize the response of the sensor probe by keeping the fibers at various displacement configurations. The detected voltage is digitized and fed to an oscilloscope.

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