Investigation of MEMS as accelerometer sensor in an Implantable Centrifugal Blood Pump prototype

Autor(es):Mostrar menos -

Silva Neto, S. ^{[1, 2]} ; Sousa Sobrinho, J. R. C. ^{[3, 4]} ; da Costa, C. ^[3] ; Leao, T. F. ^[3] ; Senra, S. A. M. M. ^[1] ; Bock, E. G. P. ^[3] ; Santos, G. A. ^[3] ; Souza, S. T. ^[2] ; Silva, D. M. ^[1] ; Frajuca, C. ^[3] ; Souza, M. A. ^[3]

Afiliação do(s) autor(es)

^[1] Fac Tecnol Sao Paulo FATEC SP, Dept Mecan Precisao, Av Tiradentes, 615 Bom Retiro, BR-01124060 Sao Paulo, SP - Brazil

^[2] Fac Tecnol Itaquera Prof Miguel Reale FATEC Itaqu, Dept Automacao Ind, Av Miguel Ignacio Curi, 360 Itaquera, BR-08295005 Sao Paulo, SP - Brazil

^[3] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Dept Mecan, Campus Sao Paulo, Rua Pedro Vicente 625, BR-01109010 Sao Paulo, SP - Brazil

^[4] Univ Sao Paulo, Escola Politecn, Dept Engn Mecatron & Sistemas Mecan, Av Prof Mello Moraes 2231, Cidade Univ, BR-05508030 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 42, n. 9 AUG 24 2020.
• Citações Web of Science: 0

Resumo

Microelectromechanical systems (MEMS) accelerometers have applications in many fields based on the measurement of Cartesian components of the gravitational acceleration vector. Miniaturized MEMS have low power consumption and adequate response to dynamic acceleration. In order to detect thrombus inside blood pumps, an experimental setup was assembled with the MEMS accelerometer sensor (ADXL335, Analog Devices, Norwood). This detector should contribute to a recent study of fault diagnosis in an Implantable Centrifugal Blood Pump (ICBP) using vibrational analysis for detection of thrombus adhered in the pump's rotor. This work proposes to verify the performance of the experimental data acquisition system developed with the MEMS accelerometer sensor in the vibrational analysis of ICBP. For this, a comparison between the vibrational spectra obtained by the MEMS acquisition system and the commercial type -Vaibro (R) Vibrational Analyzer and Field Balancer (Rozh-VaibroSmart CH1 model) is made. Tests were carried out with different pump speeds in a mock loop, at this stage, without thrombus simulation. The vibrational spectra were plotted on graphs for analysis of their harmonic components, based on the fast Fourier transform. The spectral features for each speed of the pump rotor are compared and discussed. The experiment shows that the MEMS accelerometer sensor has better efficiency in detecting harmonics in the range from approximate to 50 to approximate to 150 Hz, at speeds greater than 1200 rpm, suggesting that MEMS can detect thrombi in ICBP. (AU)

• Processo FAPESP: 13/26258-4 - Matéria superdensa no universo
• Beneficiário: Manuel Máximo Bastos Malheiro de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático