Micro-Cantilever Displacement Detection Based in Optical Fiber Tip

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Robalinho, P (Author) Other; Frazao, O (Author) FCUP

Journal

Title: Sensors

Vol. 19

Final page: 4826

ISSN: 1424-3210

Publisher: MDPI

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00R-8X0

DOI: 10.3390/s19224826

Abstract (EN): This work demonstrates the potential of combining a microsphere with a tip for the functionality of the contact sensor. This sensor consists of a tip aligned with the fiber core and a microsphere, which appears during tip formation. This new structure was produced using the electric arc machine. The sensor operation consists of the variation of the tip curvature, which causes a variation of the optical paths and, consequently, a change in the output signal. The study of this micro-cantilever consisted of an exploration of the contact mode. In addition, the sensor was characterized by temperature, which shows very low sensitivity and vibration. This last characterization was performed with two configurations parallel and perpendicular to the oscillating surface. The perpendicular case showed higher sensitivity and has an operating band of 0 Hz to 20 kHz. In this configuration, for frequencies up to 2 Hz, the intensity varies linearly with the frequencies and with a sensitivity of 0.032 +/- 0.001 (Hz(-1)). For the parallel case, the operating band was from 1.5 kHz to 7 kHz.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9