Surface electromyography (sEMG) is considered an established means for controlling prosthetic devices. sEMG suffers from serious issues such as electrical noise, motion artifact, complex acquisition circuitry, and high measuring costs because of which other techniques have gained attention. This work presents a new optoelectronic muscle (OM) sensor setup as an alternative to the EMG sensor for precise measurement of muscle activity. The sensor integrates a near-infrared light-emitting diode and phototransistor pair along with the suitable driver circuitry. The sensor measures skin surface displacement (that occurs during muscle contraction) by detecting backscattered infrared light from skeletal muscle tissue. With an appropriate signal processing scheme, the sensor was able to produce a 0–5 V output proportional to the muscular contraction. The developed sensor depicted decent static and dynamic features. In detecting muscle contractions from the forearm muscles of subjects, the sensor showed good similarity with the EMG sensor. In addition, the sensor displayed higher signal-to-noise ratio values and better signal stability than the EMG sensor. Furthermore, the OM sensor setup was utilized to control the rotation of the servomotor using an appropriate control scheme. Hence, the developed sensing system can measure muscle contraction information for controlling assistive devices.
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March 2023
Research Article|
March 20 2023
An optoelectronic muscle contraction sensor for prosthetic hand application
Neeraj Sharma
;
Neeraj Sharma
(Conceptualization, Formal analysis, Investigation, Methodology, Resources, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
School of Biomedical Engineering, Indian Institute of Technology (BHU)
, Varanasi 221005, India
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Alok Prakash
;
Alok Prakash
a)
(Conceptualization, Formal analysis, Investigation, Methodology, Resources, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
2
CSIR-National Physical Laboratory
, New Delhi 110012, India
a)Author to whom correspondence should be addressed: alok.prakash@nplindia.org. Present address: Electromagnetic Metrology Section, Indian Standard Time, CSIR-National Physical Laboratory, New Delhi, India.
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Shiru Sharma
Shiru Sharma
(Conceptualization, Investigation, Methodology, Resources, Supervision, Visualization, Writing – review & editing)
1
School of Biomedical Engineering, Indian Institute of Technology (BHU)
, Varanasi 221005, India
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a)Author to whom correspondence should be addressed: alok.prakash@nplindia.org. Present address: Electromagnetic Metrology Section, Indian Standard Time, CSIR-National Physical Laboratory, New Delhi, India.
Rev. Sci. Instrum. 94, 035009 (2023)
Article history
Received:
October 11 2022
Accepted:
March 05 2023
Citation
Neeraj Sharma, Alok Prakash, Shiru Sharma; An optoelectronic muscle contraction sensor for prosthetic hand application. Rev. Sci. Instrum. 1 March 2023; 94 (3): 035009. https://doi.org/10.1063/5.0130394
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