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Sensors 2013, 13(11), 15068-15084; doi:10.3390/s131115068
Article

Digital Signal Processing by Virtual Instrumentation of a MEMS Magnetic Field Sensor for Biomedical Applications

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Received: 1 July 2013; in revised form: 24 October 2013 / Accepted: 28 October 2013 / Published: 5 November 2013
(This article belongs to the Special Issue Biomedical Sensors and Systems)
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Abstract: We present a signal processing system with virtual instrumentation of a MEMS sensor to detect magnetic flux density for biomedical applications. This system consists of a magnetic field sensor, electronic components implemented on a printed circuit board (PCB), a data acquisition (DAQ) card, and a virtual instrument. It allows the development of a semi-portable prototype with the capacity to filter small electromagnetic interference signals through digital signal processing. The virtual instrument includes an algorithm to implement different configurations of infinite impulse response (IIR) filters. The PCB contains a precision instrumentation amplifier, a demodulator, a low-pass filter (LPF) and a buffer with operational amplifier. The proposed prototype is used for real-time non-invasive monitoring of magnetic flux density in the thoracic cage of rats. The response of the rat respiratory magnetogram displays a similar behavior as the rat electromyogram (EMG).
Keywords: digital signal processing; magnetic field sensor; magnetogram; MEMS; silicon resonator; virtual instrument digital signal processing; magnetic field sensor; magnetogram; MEMS; silicon resonator; virtual instrument
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Juárez-Aguirre, R.; Domínguez-Nicolás, S.M.; Manjarrez, E.; Tapia, J.A.; Figueras, E.; Vázquez-Leal, H.; Aguilera-Cortés, L.A.; Herrera-May, A.L. Digital Signal Processing by Virtual Instrumentation of a MEMS Magnetic Field Sensor for Biomedical Applications. Sensors 2013, 13, 15068-15084.

AMA Style

Juárez-Aguirre R, Domínguez-Nicolás SM, Manjarrez E, Tapia JA, Figueras E, Vázquez-Leal H, Aguilera-Cortés LA, Herrera-May AL. Digital Signal Processing by Virtual Instrumentation of a MEMS Magnetic Field Sensor for Biomedical Applications. Sensors. 2013; 13(11):15068-15084.

Chicago/Turabian Style

Juárez-Aguirre, Raúl; Domínguez-Nicolás, Saúl M.; Manjarrez, Elías; Tapia, Jesús A.; Figueras, Eduard; Vázquez-Leal, Héctor; Aguilera-Cortés, Luz A.; Herrera-May, Agustín L. 2013. "Digital Signal Processing by Virtual Instrumentation of a MEMS Magnetic Field Sensor for Biomedical Applications." Sensors 13, no. 11: 15068-15084.



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