Novel fiber optic sensor for grip testing

Li Ping Zhao; Zhong Ping Fang; Jinu Paul; Bryan Kok Ann Ngoi; Jun Hong Ng

doi:10.1117/12.569790

7 December 2004 Novel fiber optic sensor for grip testing

Li Ping Zhao, Zhong Ping Fang, Jinu Paul, Bryan Kok Ann Ngoi, Jun Hong Ng

Proceedings Volume 5588, Smart Medical and Biomedical Sensor Technology II; (2004) https://doi.org/10.1117/12.569790
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

Grip strength is an easy measure of skeletal muscle function as well as a powerful predictor of disability, morbidity and mortality. In order to measure the grip strength, a novel fiber optic approach is proposed and demonstrated. Strain dependent wavelength response of fiber Bragg gratings (FBGs) has been utilized to obtain the strength of individual fingers. Five FBGs are written at different center wavelengths on a single photosensitive fiber. Each FBG is used to get the response from each individual finger. The fiber containing the gratings is attached to a suitable grip holder, which can effectively transfer the grip force to the FBGs. An additional reference FBG is also provided to make the device temperature insensitive. Experimental results show that the wavelength shifts of the order of 0.2-0.5 nm can be achieved for individual fingers. The device is calibrated in terms of load to convert the wavelength shift to the strength of the grip. The time dependent wavelength fluctuations was also studied and presented in this paper.

Citation Download Citation

Li Ping Zhao, Zhong Ping Fang, Jinu Paul, Bryan Kok Ann Ngoi, and Jun Hong Ng "Novel fiber optic sensor for grip testing", Proc. SPIE 5588, Smart Medical and Biomedical Sensor Technology II, (7 December 2004); https://doi.org/10.1117/12.569790

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