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Schenato, Luca (author), Aguilar Lopez, J.P. (author), Galtarossa, Andrea (author), Pasuto, Alessandro (author), Bogaard, T.A. (author), Palmieri, Luca (author)This paper describes the implementation of an FBG sensor to measure water levels in a dike. The sensor is based on a 3D-printed mechanical transducer through which the external pressure is converted into longitudinal strain exerted on the fiber. An additional FBG integrated within the sensor measures temperature and is used to compensate for...journal article 2021
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Massaad Mouawad, J.M. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author)Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers that are carefully positioned before use. This positioning process consists of manually finding the distance between the transducer elements, along the pipe axis, for which maximum signal-to-noise ratio (SNR) is achieved. This distance depends on the sound...journal article 2021
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Lopes Marta da Costa, T.M. (author), Shi, Chen (author), Tien, Kevin (author), Elloian, Jeffrey (author), A. Cardoso, Filipe (author), Shepard, Kenneth (author)Emerging non-imaging ultrasound applications, such as ultrasonic wireless power delivery to implantable devices and ultrasound neuromodulation, require wearable form factors, millisecond-range pulse durations and focal spot diameters approaching 100 μm with electronic control of its three-dimensional location. None of these are compatible...journal article 2021
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Zangabad, Reza Pakdaman (author), Bosch, Johan G. (author), Mastik, Frits (author), Beurskens, Robert H.S.H. (author), Henneken, Vincent A. (author), Weekamp, Johannes W. (author), van der Steen, A.F.W. (author), van Soest, Gijs (author)Intravascular ultrasound (IVUS) is a well-established diagnostic method that provides images of the vessel wall and atherosclerotic plaques. We investigate the potential for phased-array IVUS utilizing coded excitation (CE) for improving the penetration depth and image signal-to-noise ratio (SNR). It is realized on a new experimental...journal article 2021
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Waasdorp, R. (author), Mugge, W. (author), Vos, H.J. (author), De Groot, Jurriaan H. (author), Verweij, M.D. (author), de Jong, N. (author), Schouten, A.C. (author), Daeichin, V. (author)Skeletal muscles generate force, enabling movement through a series of fast electro-mechanical activations coordinated by the central nervous system. Understanding the underlying mechanism of such fast muscle dynamics is essential in neuromuscular diagnostics, rehabilitation medicine and sports biomechanics. The unique combination of...journal article 2021
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Mariello, M. (author), Blad, Thijs (author), Mastronardi, V. M. (author), Madaro, F. (author), Guido, F. (author), Staufer, U. (author), Tolou, N. (author), De Vittorio, M. (author)There is a high demand for novel flexible micro-devices for energy harvesting from low-frequency and random mechanical sources. The research of new functional designs is required to strategically enhance the performances and to increase the control on mechanical flexibility. In this work we report the fabrication and characterization of bi...journal article 2021
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Kim, Taehoon (author), Fool, F. (author), Simoes dos Santos, D. (author), Chang, Z.Y. (author), Noothout, E.C. (author), Vos, H.J. (author), Bosch, Johan G. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)This paper presents an ultrasound transceiver application-specific integrated circuit (ASIC) directly integrated with an array of 12 × 80 piezoelectric transducer elements to enable next-generation ultrasound probes for 3D carotid artery imaging. The ASIC, implemented in a 0.18 µm high-voltage Bipolar-CMOS-DMOS (HV BCD) process, adopted a...journal article 2021
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Falcetelli, F. (author), Venturini, Nicolas (author), Barroso Romero, M. (author), Martinez, Marcias J. (author), Pant, Shashank (author), Troiani, Enrico (author)Structural Health Monitoring (SHM) aims to shift aircraft maintenance from a time-based to a condition-based approach. Within all the SHM techniques, Acoustic Emission (AE) allows for the monitoring of large areas by analyzing Lamb waves propagating in plate like structures. In this study, the authors proposed a Time Reversal (TR) methodology...journal article 2021
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van Kessel, C.L. (author), Bauer, P. (author), Ferreira, Jan Abraham (author)Dielectric elastomer transducers (DETs) are commonly modeled by lumped-element models (LEMs), however such models do not capture the cutoff behavior that manifests at relatively low frequencies due to the high resistivity of the stretchable electrodes. Moreover, the contribution of the electrodes into the lumped series resistance is not...journal article 2021
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Saccher, M. (author), Kawasaki, S. (author), Dekker, R. (author)Recently, focused ultrasound has been proposed to power deeply implanted medical devices. Almost exclusively, lead zirconate titanate (PZT) transducers are used to convert acoustic energy into electrical energy. Unfortunately, these lead containing devices cannot be hermetically encapsulated since that would block the ultrasound. We propose the...conference paper 2021
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Hakakzadeh, Soheil (author), Mozaffarzadeh, M. (author), Mostafavi, Seyed Masood (author), Amjadian, Mohammadreza (author), Kavehvash, Zahra (author), Verweij, M.D. (author), de Jong, N. (author)In circular photoacoustic computed tomography, for data acquisition, a single-element transducer rotates around the region of interest (ROI). Due to the limited acceptance angle of the finite size transducer, the reconstructed image becomes blurred, and tangential resolution/contrast degrades in off-center locations in the ROI. In this paper, we...conference paper 2021
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Simoes dos Santos, D. (author), Fool, F. (author), Kim, Taehoon (author), Noothout, E.C. (author), Vos, H.J. (author), Bosch, Johan G. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author), de Jong, N. (author)Over the past decades, real-time three-dimensional (3D) medical ultrasound has attracted much attention since it enables clinicians to diagnose more accurately. This calls for ultrasound matrix transducers with a large number of elements, which can be interfaced with an application-specific integrated circuit (ASIC) for data reduction. An...conference paper 2021
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Kawasaki, S. (author), Westhoek, Y. (author), Subramaniam, I. (author), Saccher, M. (author), Dekker, R. (author)Using ultrasound to power deeply implanted biomedical devices is a promising technique due to its low attenuation in body tissue and its short wavelength that allows precise focusing of the energy. Ultrasound energy harvesting conventionally has been done using lead zirconate titanate (PZT) ultrasound transducers, which uses the piezoelectric...conference paper 2021
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Anand, C. (author), Delrue, Steven (author), Jeong, Hyunjo (author), Shroff, Sonell (author), Groves, R.M. (author), Benedictus, R. (author)Phased array ultrasonic testing is widely used to test structures for flaws due to its ability to produce steered and focused beams. The inherent anisotropic nature of some materials, however, leads to skewing and distortion of the phased array beam and consequently measurement errors. To overcome this, a quantitative model of phased array...journal article 2020
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Mohd Isa, W.H.B. (author), Hunt, A. (author), Hassan HosseinNia, S. (author)Limitations of conventional actuators and sensors in small-scaled and complex devices have diverted the researches' attentions towards smart material transducers such as ionic polymer-metal composites (IPMCs). In addition to actuation capabilities, IPMCs generate voltage when subjected to mechanical deformation. Utilization of IPMCs as...conference paper 2020
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Li, Ming Huang (author), Lu, Ruochen (author), Manzaneque Garcia, T. (author), Gong, Songbin (author)In this work, thin-film lithium niobate (LiNbO<sub>3</sub>) acoustic delay line (ADL) based oscillators are experimentally investigated for the first time for the application of single-mode oscillators and frequency comb generation. The design space for the ADL-based oscillator is first analyzed, illustrating that the key to low phase noise...conference paper 2020
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Mohd Isa, W.H.B. (author), Hunt, A. (author), Hassan HosseinNia, S. (author)Ionic polymer–metal composites (IPMC) are smart material transducers that bend in response to low-voltage stimuli and generate voltage in response to bending. IPMCs are mechanically compliant, simple in construction, and easy to cut into desired shape. This allows the designing of novel sensing and actuation systems, e.g., for soft and bio...review 2019
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Manzaneque Garcia, T. (author), Lu, Ruochen (author), Yang, Yansong (author), Gong, Songbin (author)This paper demonstrates low-loss acoustic delay lines (ADLs) based on shear-horizontal waves in thin-film LiNbO <sub>3</sub> for the first time. Due to its high electromechanical coupling, the shear-horizontal mode is suited for producing devices with large bandwidths. Here, we show that shear-horizontal waves in LiNbO <sub>3</sub> thin...journal article 2019
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Tan, M. (author), Chen, C. (author), Chen, Z. (author), Janjic, Jovana (author), Daeichin, V. (author), Chang, Z.Y. (author), Noothout, E.C. (author), van Soest, G. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)This paper presents an area- and power-efficient application-specified integrated circuit (ASIC) for 3-D forward-looking intravascular ultrasound imaging. The ASIC is intended to be mounted at the tip of a catheter, and has a circular active area with a diameter of 1.5 mm on the top of which a 2-D array of piezoelectric transducer elements is...journal article 2018
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Kang, E. (author), Ding, Q. (author), Shabanimotlagh, M. (author), Kruizinga, P. (author), Chang, Z.Y. (author), Noothout, E.C. (author), Vos, H.J. (author), Bosch, J.W. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)This paper presents an ultrasound transceiver application-specific integrated circuit (ASIC) designed for 3-D ultrasonic imaging of the carotid artery. This application calls for an array of thousands of ultrasonic transducer elements, far exceeding the number of channels of conventional imaging systems. The 3.6 x 6.8 mm&#x00B2; ASIC...journal article 2018