Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/158516
Title: Optical pore water pressure sensing for geotechnical applications
Authors: Wong, Katherine Li Ying
Keywords: Engineering::Civil engineering
Issue Date: 2022
Publisher: Nanyang Technological University
Source: Wong, K. L. Y. (2022). Optical pore water pressure sensing for geotechnical applications. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/158516
Abstract: Pore water pressure (PWP) monitoring is an essential aspect in geotechnical engineering. Accurate PWP measurement is necessary for correct representation of underground soil condition. Piezometer that allows simultaneous high resolution and large range measurement will be highly beneficial. In practice, conventional piezometers have shown to be reliable and robust however they have some shortcomings. The shortcomings are namely being prone to electromagnetic interference, labour intensive and time consuming. A fiber optic interferometric piezometer is designed to overcome the limitations of conventional piezometers. This piezometer is an optical fiber extrinsic Fabry-Perot interferometer (EFPI), which comprises of a fiber ferrule connector/flat contact (FC/FC) connector and an aluminium foil pasted on a thin metal plate. The thin metal plate is subjected to water pressure, causing deformation which obeys the small deflection theory. By adopting the conventional demodulation method used by FPI piezometer that is wavelength tracking method, measurement range is limited despite the high level of accuracy. Therefore, in this report, various demodulation methods were analyzed using the proposed piezometer to develop a suitable demodulation technique that allows simultaneous high resolution and large range measurement.
URI: https://hdl.handle.net/10356/158516
Schools: School of Civil and Environmental Engineering 
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:CEE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
FYP report _GE15_U1821406A.pdf
  Restricted Access
FYP report3.8 MBAdobe PDFView/Open

Page view(s)

36
Updated on Jun 7, 2023

Download(s)

2
Updated on Jun 7, 2023

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.