Inclinometers.pdf

Researchers developed a novel fiber optic inclinometer based on integrated optics microfabrication, offering performances comparable to standard electrical tilt sensors, but with advantages such as insensitivity to electromagnetic interference and compatibility with existing Fabry-Perot readout modules. The sensor design uses a silicon micro-machined sensing element, enabling a smaller, cheaper, and more reliable device. Key specifications include an operational temperature range of -40°C to +80°C, angular measurement range of ± 10 deg, and angular measurement resolution/accuracy of 0.1 mm/m. The device uses Fabry-Perot sensing technology, which provides absolute cavity length measurements with high accuracy and linearity. Typical applications include monitoring structural health, detecting zones of movement, and verifying stability of dams and other structures.