POF-based digital I-OFDR for strain detection in road construction

Korbinain Königsbauer; Aleksander Wosniok; Nils Nöther; M. B. Schaller

doi:10.1117/12.2678436

23 May 2023 POF-based digital I-OFDR for strain detection in road construction

Korbinain Königsbauer, Aleksander Wosniok, Nils Nöther, M. B. Schaller

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 1264326 (2023) https://doi.org/10.1117/12.2678436
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

We report on the development of a field-proven distributed fiber optic sensing system for structural health monitoring in road construction and civil engineering. The system is based on a cost-efficient digital incoherent optical frequency domain reflectometry (I-OFDR) for distributed strain detection along a polymer optical fiber. In this method, the strain-induced backscatter increase in a graded-index multimode perfluorinated polymer optical fiber (PF-POF) is determined by measuring the complex transfer function of the sensing fiber using a compact digital data acquisition unit. This unit replaced an oversized vector network analyzer (VNA) usually used in the I-OFDR technique making the measurement system more robust and more suitable for its use in the field, whilst at the same time providing a significant reduction of the total sensor system costs. This paper presents a successful implementation of the entire sensor concept in a real construction project for the soil reinforcement and fiber optic monitoring of a road embankment using geosynthetics with incorporated PF-POF. The presented research includes development and installation in the field of the sensors integrated geosynthetics used for ground stabilization and additionally providing fiber optic POF-based monitoring function. The publication shows first measurement results of the further developed measurement method I-OFDR conducted along the PF-POF integrated in the geosynthetics embedded into a road embankment of the federal road B91 south from Leipzig.

Citation Download Citation

Korbinain Königsbauer, Aleksander Wosniok, Nils Nöther, and M. B. Schaller "POF-based digital I-OFDR for strain detection in road construction", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 1264326 (23 May 2023); https://doi.org/10.1117/12.2678436

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available