Fiber Bragg Gratings For Measuring Biaxial Tilt

TerraSense (Universiti Malaya)
Socio-Economics Driver
Smart Technology and Systems
Science & Technology Driver
Sensor Technology
Technology Readiness Level
7
Intellectual Property
PI 2022002244

TerraSense offers a cost-efficient, passive optical fibre solution that enables integrated surface and subsurface monitoring within a single system. Unlike probe-based inclinometers, it operates autonomously and provides continuous real-time data, while its passive design makes it more resistant to environmental interference such as lightning, improving reliability and reducing maintenance costs. It also combines sensing hardware with proprietary software and analytics to deliver a scalable, end-to-end monitoring solution at a lower cost than conventional systems, supported by a patented design that strengthens its market position.

Current slope and landslide monitoring systems are costly, limited in coverage, and often rely on manual inspections. They typically focus on surface movement and lack subsurface data needed for early detection, while existing tools can be labour-intensive or vulnerable to environmental disruptions. These limitations make continuous monitoring inefficient, especially for large or high-risk sites, highlighting the need for a more affordable, autonomous, and reliable real-time solution.

TerraSense uses optical fibre sensing technology, specifically Fiber Bragg Grating (FBG), to detect slope movement through changes in light wavelength caused by ground strain. These fibre sensors are embedded in surface and subsurface monitoring devices, enabling continuous detection of tilt and displacement. The data is transmitted to a cloud-based dashboard and mobile application for real-time visualisation and analysis. As a passive sensing system, it is highly resistant to environmental interference such as lightning, while also reducing the need for manual inspection through autonomous, real-time monitoring.

The innovation of TerraSense lies in its use of Fiber Bragg Grating (FBG) optical fibre technology for real-time, autonomous monitoring of slope and structural movement. Unlike conventional systems, it enables continuous surface and subsurface detection without manual inspection, offering higher reliability and lower maintenance. Its passive sensing design improves resistance to environmental interference, while integration with cloud-based analytics provides real-time insights for early warning and proactive infrastructure management.

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