• Dr. Chethana K
• Dr. Guru Prasad A.S
• Prof. Asokan S

The quantification of human hand grip is important for understanding several important biomechanical aspects like neuromuscular system function, overall upper-limb strength, vertebral fracture and bone mass density (forearm, skeletal sites, spine, hip etc). This paper describes a novel Fiber Bragg Grating sensor based Hand Grip Device (FBGHGD) which can be used to quantify the human hand grip. Here, the strain dependent wavelength responses of FBGs are utilized to obtain the force applied by the human hand grip employing a novel mechanical package. The FBGHGD developed is calibrated using a Compression Testing Machine (CTM) to obtain the relation between the load/force exerted on FBGHGD and the shift in Bragg wavelength of the FBG sensor; this in turn is used to deduce the value of the force exerted in kilograms. Further, the FBGHGD is clinically tested against a commercial Jammer dynamometer with a series of standard test protocols and the obtained results are compared. The demonstrated FBGHGD is accurate and in comparison to dynamometer, it additionally provides real-time variations of the force exerted by hand grip which can be used to deduce several ergonomically vital parameters such as maximum grip force, stamina index, fatigue build-up etc., to aid in better understanding of skeletal muscle function, prediction of disability, incapacity and mortality.

Fiber Braggs Grating, Hand grip force, Wrist force measurement, Grip force measurement, Musculoskeletal disorder.

"Fiber Bragg Grating Sensor Based Device for the Measurement of Hand Grip Strength", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.450-454, June 2019, Available :http://www.jetir.org/papers/JETIR1906Q63.pdf

"Fiber Bragg Grating Sensor Based Device for the Measurement of Hand Grip Strength", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp450-454, June 2019, Available at : http://www.jetir.org/papers/JETIR1906Q63.pdf