Multichannel Arbitrary Waveform Beamformer Transmitter For Experimental Research Activities Of Ultrasound [beamformer De Transmissão Multicanal De Forma De Onda Arbitrária Para Atividades De Pesquisa Experimental Do Ultrassom]

dc.creatorAssef A.A.
dc.creatorMaia J.M.
dc.creatorSchneider F.K.
dc.creatorCosta E.T.
dc.creatorDa Button V.L.S.N.
dc.date2012
dc.date2015-06-26T20:29:04Z
dc.date2015-11-26T14:25:19Z
dc.date2015-06-26T20:29:04Z
dc.date2015-11-26T14:25:19Z
dc.date.accessioned2018-03-28T21:27:44Z
dc.date.available2018-03-28T21:27:44Z
dc.identifier
dc.identifierControle Y Automacao. , v. 23, n. 6, p. 667 - 678, 2012.
dc.identifier1031759
dc.identifier10.1590/S0103-17592012000600002
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84873299592&partnerID=40&md5=be32c4c5054494b47722ff8ea7f72c1d
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/96875
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/96875
dc.identifier2-s2.0-84873299592
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1245672
dc.descriptionThis paper presents the development of a digital beamformer transmitter system for generation of arbitrary ultrasound waveforms, specifically designed for research purposes. The proposed architecture has 8 independent excitation channels and uses an FPGA device (Field Programmable Gated Array) for electronic control channel generation of ultrasonic acoustic beam transmission. The system allows operation in pulse-echo mode, with pulse repetition rate of excitation between 62.5 Hz and 8 kHz, or single pulse, center frequency between 500 kHz and 20 MHz, excitation voltage between -100 and +100 V, and individual control of amplitude apodization, phase angle and time delay trigger. The mathematical method for determining the digital signals of excitation is presented and validated through practical results for waveform generation with Gaussian profile and center frequency of 20 MHz, in a load formed by a 220 pF capacitor in parallel with a resistor of 1 kΩ. The results show that the proposed flexible and fully programmable architecture, can support the development of new algorithms and sophisticated processing techniques of the transmission beamformer.
dc.description23
dc.description6
dc.description667
dc.description678
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dc.languagept
dc.publisher
dc.relationControle y Automacao
dc.rightsaberto
dc.sourceScopus
dc.titleMultichannel Arbitrary Waveform Beamformer Transmitter For Experimental Research Activities Of Ultrasound [beamformer De Transmissão Multicanal De Forma De Onda Arbitrária Para Atividades De Pesquisa Experimental Do Ultrassom]
dc.typeArtículos de revistas


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