Design of a wearable microfluidic-based mass sensor for sweat analysis in athletes

Reza Hadjiaghaie Vafaie ¹ ( Associate Professor, Electrical Engineering Faculty, University of Bonab, Bonab, Iran, [e-mail] )
Mahnaz  Mehdipoor ² ( b Postdoc Researcher, Electrical Engineering Faculty, University of Bonab, Bonab, Iran, [e-mail] )
Sobhan  Sheykhivand ³ ( )
Sayyad Nojavan ⁴ ( Associate Professor, Electrical Engineering Faculty, University of Bonab, Bonab, Iran, [e-mail] )

Submited date : 2025-01-11 Accepted date : 2025-02-18

Keywords: Mass sensor, wearable microfluidics, perspiration, sports industry, health diagnosis.,

Abstract :

Nowadays wearable sensors have been widely employed in perspiration monitoring and health diagnoses. In this paper, a mass sensor consisting of in-phase comb electrostatic actuators and an active area is presented, which can be used for microfluidic applications based on electrowetting. Rotary electrostatic actuators are connected to the active area by several springs, which made up of a circular resonator located in the central part of the sensor and its upper surface is covered with a gold layer used to trap different biological particles. By applying voltage to the com-drive electrodes, the whole system rotates parallel to the substrate so it faces the lowest viscous damping. To deliver the biological particles to the active area of the sensor, carrier droplets are used that are manipulated by the microfluidic system based on the electrowetting effect near the sensor. As the bioparticles are immobilized on the sensor, the oscillating frequency decreases. 3D structural simulations of the proposed sensor have been done with finite element-based software tools. To study viscous damping and thin film damping effects, the stokes-type model and the couette-type model were applied in the simulations, respectively and the results indicate that the sensor oscillates with a working frequency ofAs the bioparticles are immobilized on the sensor, the oscillating frequency decreases. 3D structural simulations of the proposed sensor have been done with finite element-based software tools. imulations of the proposed sensor have been done with finite element-based software tools. sor have been done with 

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