Artículos de revistas
System For Generation, Acquisition, And Processing Of Ultra-sound Signals [sistema Para Geração, Aquisição E Processamento De Sinais De Ultra-som]
Registro en:
Controle Y Automacao. , v. 20, n. 2, p. 145 - 155, 2009.
1031759
2-s2.0-68549125308
Autor
Assef A.A.
Gewehr P.M.
Costa E.T.
Maia J.M.
Gamba H.R.
Button V.L.S.N.
Institución
Resumen
This work describes a system for generation, acquisition and processing of ultrasonic signals to be used in material characterization. The system can be used in the pulse-echo and transmission-reception modes, with programmable sampling rate between 5 MHz and 80 MHz, internal triggering, repetition rate between 111 Hz and 333 Hz, pulse width of 100 ns and amplitude of 200 V. The reception circuits operate from 20 kHz to 30 MHz, with gain control from -40 dB to +40 dB. In order to evaluate the system performance, the propagation velocity and broadband attenuation of ultrasonic waves BUA were measured in acrylic and water. The results presented deviation below 1 %, showing good repeatability and demonstrating that the system can be used in non invasive and non destructive tests for different material characterization. 20 2 145 155 Adamowski, J.C., Buiochi, F., Simon, C., Solva, E.C.N., Sigelmann, R.A., Ultrasonic measurement of density of liquids (1995) Journal of the Acoustical Society of America, 97 (1), pp. 354-361 Bronzino, J.D., (1986) Biomedical engineering and instrumentation: Basic concepts and application, , PWS Engineering, Boston Dorabiato, L.F., (2007) Sistema de ultra-som para carac- terização de leite bovino, , Dissertação de Mestrado, UTPFR, Curitiba-PR Dorabiato, L.F., Maia, J.M., Gamba, H.R., Caracte- rização de leite bovino por ultra-som. (2006) Anais do XX Congresso de Engenharia Biomédica, pp. 788-791. , São Pedro pp Duarte, M.A., Machado, J.C., Pereira, W.C.A., Método para classificação de ecos reais e de reverbe-ração em meios homogêneos, multicamadas. (1999) Revista Brasileira de Engenharia Biomédica, 15 (3), pp. 159-174 Grimm, M. J. and Williams, J. L. (1993). Use of ultrasound attenuation and velocity to estimate Young's modulus in trabecular bone. IEEE Transactions on Ultrasound, Ferroelectrics, and Frequency Control, 42 pp. 62-63Higuti, R.T., Bacaneli, F., Furukawa, C.M., Adamowski, J.C., Ultrasonic characterization of emulsions: Milk and water in oil (1999) IEEE Ultrasonics Symposium, pp. 779-782. , Ceasars Tahoe pp Hull, J.B., Langton, C.M., Barker, S., Joner, A.R., Identification and characterization of materials by broadband ultrasonic attenuation analysis (1996) Journal of Materials Processing Technology, 56 (3), pp. 148-157 Kane, S. A. (2002). 9. Ultrasound Imaging, In: Introduction to Physics in Modern Medicine Dis-ponível em http://www.haverford.edu/ physics-astro/course{\-}materials/ phys108b/211-10UltrasoundImaging.doc. Acesso em 15 set. 2008Kino, G.S., (1987) Acoustic Waves: Devices, Imaging, and Analog Signal Processing, , Prentice Hall, New Jersey Langton, C.M., Palmer, S.B., Porter, R.W., The measurement of broadband ultrasonic attenuation in cancellous bone (1984) Engineering in Medicine, 13 (2), pp. 89-91 Maia, J. M. (2001). Sistema ultra-sônico para auxílio ao diagnóstico da osteoporose. Tese de Doutorado, UNI-CAMP/FEEC, Campinas-SP(2005) LM723 Voltage Regulator, , http://cache.national.com/ds/LM/LM723.pdf, National Semiconductor, Inc , Disponível em:, Acesso em 15 set. 2008 Nicholson, P.H.F., Lowet, G., Cheng, X.G., Boonen, S., De-queker, J., Van Der Perre, G., Ultrasonic measurement of the calcaneus: Investigation of some error sources and correlation with femoral strength (1997) IEEE Engineering in Medicine and Biology Society, 2 (1), pp. 477-478 Njeh, C.F., Saeed, I., Grigorian, M., Kender, D.L., Fan, B., Shepherd, J., McClung, M., Genant, H.K.G., Assessment of bone status using speed of sound at multiple anatomical sites (2001) Ultrasound in Medicine and Biology, 27 (10), pp. 1337-1345 Oppenhein, A.V., Schafer, R.R., (1975) Digital signal processing, , Prentice Hall, New Jersey Shung, K. K. (1996). From the Guest Editor - Advances in Ultrasound. IEEE - Engineering in Medicine and Biology, 15, No. 6 pp. 18-19Strelitzki, R., Evans, J.A., An investigation of the measurement of Broadband Attenuation in trabecular bone (1996) Ultrasonics, 34 (2), pp. 785-791 (2002) ADS5410 EVM - User's guide, , http://focus.ti.com/lit/ug/slau082/slau082.pdf, Texas Instruments, Inc, Disponível em:, Acesso em 15 set. 2008 Webb, S. (1988). The physics of medical imaging. S. Weeb, Adam Hilger, BristolWells, P.N.T., (1977) Ultrasonics in clinical diagnosis, , Churchill Livingstone Inc, Edinburgh Wells, P.N.T., (1993) Advances in ultrasound techniques and instrumentation, , Churchill Livingstone Inc, New York