das_bhm

Bridge Monitoring Using Existing Telecommunication Fiber-Optic Cables

This repository contains scripts and data used to generate figures for our study on bridge monitoring using Distributed Acoustic Sensing (DAS) on pre-existing telecom or dark fiber (Telecom as Sensors).

If you use this repository, please cite the associated paper and related works:

• Liu, J., Aggarwal, J., Hwang, D., Lee, J., Wu, Y., Yin, F., Li, H., Santi, P., Sohn, H., Biondi, B. and Ratti, C., 2025. Bridge Monitoring Using Existing Telecom Fiber-Optic Networks.
• Liu, J., Yuan, S., Luo, B., Biondi, B. and Noh, H.Y., 2023. Turning telecommunication fiber‐optic cables into distributed acoustic sensors for vibration‐based bridge health monitoring. Structural Control and Health Monitoring, 2023(1), p.3902306.

Visualization

Final figure panels are provided in the figs/ folder in PDF format.

Jupyter notebooks in the repository reproduce the main and extended figures.

Hardware requirements

This implementation requires only a standard computer with enough RAM to support in memory operations for figure generation.

Software requirements

OS Requirements
This package is supported for Linux. It has been tested on Ubuntu Linux.

Python Dependencies

This implementation mainly depends on the following Python implementations.

• numpy
• scipy
• matplotlib

Additional packages may be required depending on your environment and notebook execution.

File List

Data

Contains data files used to generate the main and extended figures.

• data/fig1.npz, data/fig3.npz, data/fig4.npz, data/fig6.npz
• data/fig3f2.csv, data/supfig2.csv
• data/fig5_ms.npz, data/fig5a.npz
• data/extfig1.npz, data/extfig2.npz, data/extfig3.npz, data/extfig4.npz, data/extfig9.npz
• data/extfig1f1.npz, data/extfig1f2.csv, data/extfig2f1.npz, data/extfig2f2.csv
• data/extfig5_ms.npz, data/extfig5_ms.pkl, data/extfig5a.npz
• data/extfig6_ms.npz, data/extfig6a.npz
• data/extfig7_ms.npz, data/extfig7a.npz

Figs

Stores exported figure panels in PDF format.

• Main figure panels, for example fig1b.pdf, fig1c.pdf, fig4b.pdf, fig4c.pdf, fig6a.pdf, fig6b.pdf, fig6c.pdf, fig6d.pdf
• Extended figure panels, for example extfig1d.pdf, extfig1e.pdf, extfig1f.pdf, extfig2d.pdf, extfig2e.pdf, extfig2f.pdf, extfig3c.pdf, extfig3d.pdf, extfig5a.pdf, extfig6a.pdf, extfig6b.pdf, extfig7a.pdf, extfig7b.pdf, extfig9.pdf
• Supplementary figure panel supfig2.pdf

Scripts

Jupyter notebooks for reproducing figures.

• fig1.ipynb
• fig3_subfig2.ipynb
• fig4.ipynb
• fig5.ipynb
• fig6_extfig9.ipynb
• extfig1.ipynb
• extfig2.ipynb
• extfig3.ipynb
• extfig4.ipynb
• extfig5.ipynb
• extfig6.ipynb
• extfig7.ipynb

Modules

Python utilities used by the notebooks.

• utils.py: plotting and processing helper functions used across figure notebooks

Contact

Feel free to send any questions to:

• Jingxiao Liu (jingxiao@mit.edu)