FBG Based Real Time Data on Hand Pressure for Analysis of Limb Functionality

The use of wheelchairs by individuals with lower limb impairments often results in upper limb injuries due to repetitive strain. This study investigates the palm pressure exerted during wheelchair propulsion, employing Fiber Bragg Grating (FBG) sensors to provide a detailed analysis. Six healthy adult participants are included in the study, where FBG sensors are attached to their palms and integrated into gloves during wheelchair movement in various directions (forward, backward, left, and right). The palm pressure is calculated based on strain values, corresponding to variations in the Bragg wavelength and simulation study is conducted using Grating MOD optical tool. The results indicate that average palm pressure ranges from 20 kPa to 100 kPa, with a maximum pressure of 115.6 kPa observed during backward propulsion, which corresponds to a 0.34 nm wavelength shift. These findings contribute valuable data for physiotherapists, offering a reference point for assessing upper limb functionality during and after stroke rehabilitation.