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Updated: Sep 13, 2025

Optimized Sealing Process and Real-Time Monitoring of Glass-to-Metal Seal Structures

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Design and Development of a Fiber Bragg Grating Sensor System for Hand Function Monitoring in Rehabilitation.

Anup M Upadhyaya¹, Preeta Sharan², H K Sowmya³

¹The Oxford College of Engineering, Affiliated to Visvesvaraya Technological University, Bengaluru, Karnataka, India.

Journal of Biophotonics

|July 31, 2025

Summary

A new Smart Grip system uses Fiber Bragg Grating (FBG) sensors for non-invasive handgrip strength measurement. This technology aids in monitoring grip strength across postures and assessing bone fracture healing.

Keywords:

FBG handgrip pressure monitoring system (FBGHPMS)FBG sensor FEA modelling hand postures handgrip bone fracture

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Area of Science:

Biomedical Engineering
Rehabilitation Technology

Background:

Handgrip pressure is a key indicator of limb strength and potential vertebral bone fracture risk.
Accurate and non-invasive measurement methods are needed for clinical applications.

Purpose of the Study:

To introduce and validate a novel Smart Grip strength measurement system.
To assess the system's capability for posture-dependent grip strength monitoring and bone fracture healing assessment.

Main Methods:

Development of a non-invasive Smart Grip system using a Fiber Bragg Grating (FBG) sensor.
Quantification of grip pressure via FBG wavelength shift analysis in various postures.
Testing the system on 20 healthy volunteers (aged 18-25).

Main Results:

The FBG sensor demonstrated a sensitivity of 1.32 pm/με.
The system measured grip pressures from 6 to 131 kPa across different hand positions.
Maximum grip pressure recorded was 131.9 kPa in the arm-dangled position.

Conclusions:

The FBG-based Smart Grip system offers a precise and efficient method for handgrip strength assessment.
The system has dual applications in real-time posture-dependent monitoring and bone fracture healing assessment.
This technology holds significant value for clinical rehabilitation and patient monitoring.