Archive · 20 Aug 2026
IIT Dhanbad Researchers Patent Temperature-Independent Optical Tilt Sensor
Researchers at IIT (ISM) Dhanbad created a sensor that can detect when a structure or machine tilts.
It can measure tilting in two directions.
The sensor sends light through a very thin glass fibre.
Tiny patterns in the fibre change the light when the sensor moves.
These light changes help calculate how much something has tilted.
The design reduces errors caused by temperature changes.
It is lightweight and can work in places with electromagnetic interference.
The sensor could help monitor bridges, machines, robots, aircraft, medical equipment, and other systems.
The researchers received a patent for the invention.
IIT (ISM) Dhanbad researchers received a patent for a temperature-independent optical sensor.
The device measures structural and equipment inclination in two directions using Fiber Bragg Grating technology.
Its glass-fibre arm and suspended spherical pendulum are enclosed in a compact box.
The sensor is lightweight, resistant to electromagnetic interference, and designed for harsh environments and low maintenance.
Potential uses include bridges, structural monitoring, industrial automation, robotics, aerospace, medical equipment, and geotechnical systems.
- Who
- Associate Professor Dr Amitesh Kumar and research scholar Randhir Kumar Sah of IIT (ISM) Dhanbad.
- What
- They invented and patented the ‘Temperature Independent 2-D Optical Tilt Sensor,’ which measures inclination in two directions.
- When
- The patent application was filed on February 10, 2025; the patent was reported on August 20.
- Where
- IIT (ISM) Dhanbad’s electronics engineering department in Dhanbad.
- Why
- To provide accurate, temperature-independent monitoring of the tilt and stability of structures, machinery, and equipment.
- Inventors
- Dr Amitesh Kumar and Randhir Kumar Sah
- Technology
- Fiber Bragg Grating (FBG) optical sensing
- Measurement
- Inclination in two directions
- Patent application date
- February 10, 2025
- Design
- A glass-fibre-based rectangular arm and suspended spherical pendulum inside a compact box
- Properties
- Lightweight, resistant to electromagnetic interference, suitable for harsh environments, and designed for low maintenance
- Potential applications
- Structural health monitoring, industrial automation, robotics, aerospace, medical equipment, and geotechnical monitoring