title: Digital signal processing by virtual instrumentation of a MEMS magnetic field sensor for biomedical applications.
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).
authors.affiliation: Micro and Nanotechnology Research Center, Universidad Veracruzana, Calzada Ruiz Cortines 455, Boca del Río 94294, Veracruz, Mexico. leherrera@uv.mx.
authors.forename: Raúl
authors.initials: R
authors.lastname: Juárez-Aguirre
authors.forename: Saúl M
authors.initials: SM
authors.lastname: Domínguez-Nicolás
authors.forename: Elías
authors.initials: E
authors.lastname: Manjarrez
authors.forename: Jesús A
authors.initials: JA
authors.lastname: Tapia
authors.forename: Eduard
authors.initials: E
authors.lastname: Figueras
authors.forename: Héctor
authors.initials: H
authors.lastname: Vázquez-Leal
authors.forename: Luz A
authors.initials: LA
authors.lastname: Aguilera-Cortés
authors.forename: Agustín L
authors.initials: AL
authors.lastname: Herrera-May
mesh_terms: D000465:Algorithms; D000818:Animals; D020811:Biomedical Technology / Q000295:instrumentation* / Q000379:methods; D004574:Electromagnetic Fields; D004582:Electronics, Medical / Q000295:instrumentation*; D004867:Equipment Design; D060306:Magnetometry / Q000295:instrumentation* / Q000379:methods; D008297:Male; D055617:Micro-Electrical-Mechanical Systems; D051381:Rats; D017207:Rats, Sprague-Dawley; D012119:Respiration; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D012825:Silicon; D013909:Thorax / Q000502:physiology
chemical_list: D012825:Silicon