Search Results - "Willigen, Douwe van"

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  1. 1

    Measurement of Pipe and Liquid Parameters Using the Beam Steering Capabilities of Array-Based Clamp-On Ultrasonic Flow Meters by Massaad, Jack, van Neer, Paul L. M. J., van Willigen, Douwe M., Pertijs, Michiel A. P., de Jong, Nicolaas, Verweij, Martin D.

    Published in Sensors (Basel, Switzerland) (06-07-2022)
    “…Clamp-on ultrasonic flow meters (UFMs) are installed on the outside of the pipe wall. Typically, they consist of two single-element transducers mounted on…”
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    Journal Article
  2. 2

    Algorithm to Correct Measurement Offsets Introduced by Inactive Elements of Transducer Arrays in Ultrasonic Flow Metering by Massaad, Jack, van Neer, Paul L M J, van Willigen, Douwe M, Pertijs, Michiel A P, de Jong, Nicolaas, Verweij, Martin D

    Published in Sensors (Basel, Switzerland) (30-11-2022)
    “…Ultrasonic flow meters (UFMs) based on transducer arrays offer several advantages. With electronic beam steering, it is possible to tune the steering angle of…”
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    Journal Article
  3. 3

    A Transceiver ASIC for a Single-Cable 64-Element Intra-Vascular Ultrasound Probe by van Willigen, Douwe M., Kang, Eunchul, Janjic, Jovana, Noothout, Emile, Chang, Zu-Yao, Verweij, Martin D., De Jong, Nico, Pertijs, Michiel A. P.

    Published in IEEE journal of solid-state circuits (01-10-2021)
    “…This article presents an application-specific integrated circuit (ASIC) designed for intra-vascular ultrasound imaging that interfaces 64 piezoelectric…”
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    Journal Article
  4. 4

    Measurement of Pipe and Fluid Properties With a Matrix Array-Based Ultrasonic Clamp-On Flow Meter by Massaad, Jack, van Neer, Paul L. M. J., van Willigen, Douwe M., Sabbadini, Alberico, de Jong, Nicolaas, Pertijs, Michiel A. P., Verweij, Martin D.

    “…Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers that are carefully positioned before use. This positioning process…”
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    Journal Article
  5. 5

    An Algorithm to Minimize the Zero-Flow Error in Transit-Time Ultrasonic Flowmeters by van Willigen, Douwe M., van Neer, Paul L. M. J., Massaad, Jack, de Jong, Nico, Verweij, Martin D., Pertijs, Michiel A. P.

    “…Transit-time ultrasonic flowmeters are widely used in industry to measure fluid flow. In practice, ultrasonic flowmeters either show a zero-flow error or…”
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    Journal Article
  6. 6

    Design and Proof-of-Concept of a Matrix Transducer Array for Clamp-On Ultrasonic Flow Measurements by Massaad, Jack, Van Neer, Paul L. M. J., Van Willigen, Douwe M., Noothout, Emile C., de Jong, Nicolaas, Pertijs, Michiel A. P., Verweij, Martin D.

    “…Common clamp-on ultrasonic flow meters consist of two single-element transducers placed on the pipe wall. Flow speed is measured noninvasively, i.e., without…”
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    Journal Article
  7. 7

    Exploiting nonlinear wave propagation to improve the precision of ultrasonic flow meters by Massaad, Jack, van Neer, Paul L.M.J., van Willigen, Douwe M., de Jong, Nicolaas, Pertijs, Michiel A.P., Verweij, Martin D.

    Published in Ultrasonics (01-09-2021)
    “…Acoustic wave propagation in ultrasonic flow measurements is typically assumed to be linear and reciprocal. However, if the transmitting transducer generates a…”
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    Journal Article
  8. 8

    Suppression of Lamb wave excitation via aperture control of a transducer array for ultrasonic clamp-on flow metering by Massaad, Jack, van Neer, Paul L. M. J., van Willigen, Douwe M., Pertijs, Michiel A. P., de Jong, Nicolaas, Verweij, Martin D.

    “…During ultrasonic clamp-on flow metering, Lamb waves propagating in the pipe wall may limit the measurement accuracy by introducing absolute errors in the flow…”
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    Journal Article
  9. 9

    Acoustic Design of a Transducer Array for Ultrasonic Clamp-on Flow Metering by Massaad, Jack, Willigen, Douwe van, van Neer, Paul, de Jong, Nicolaas, Pertijs, Michiel, Verweij, Martin

    “…Current ultrasonic clamp-on flow meters are based on single-element transducers that require manual calibration by aligning these to a fixed acoustic path…”
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    Conference Proceeding
  10. 10

    Fabrication and Characterization of a Prototype Forward-Looking Single-Cable 64-Element Intra-Vascular Ultrasound Probe by Willigen, Douwe van, Mozaffarzadeh, Moein, Noothout, Emile, Verweij, Martin, Jong, Nico de, Pertijs, Michiel, Daeichin, Verya

    “…This paper presents the integration steps towards a prototype forward-looking intra-vascular ultrasound probe. An ASIC (Application Specific Integrated…”
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    Conference Proceeding
  11. 11

    Pipe geometry calibration measurements for the improvement of ultrasonic clamp-on flow meters by Massaad, Jack, van Willigen, Douwe M., van Neer, Paul L., de Jong, Nico, Pertijs, Michiel A., Verweij, Martin D.

    “…Clamp-on flow meters need a-priori knowledge of pipe geometry and material properties for their operation. Estimation of these properties may limit the…”
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    Journal Article
  12. 12

    In-air ultrasonic gesture sensing with MEMS microphones by van Willigen, Douwe M., Mostert, Erwin, Pertijs, Michiel A. P.

    Published in IEEE SENSORS 2014 Proceedings (01-11-2014)
    “…The use of hand gestures for user interaction with computing devices is gaining popularity. This paper demonstrates that an effective ultrasonic…”
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    Conference Proceeding
  13. 13

    In toto staining and preservation of peripheral nervous tissue by Liem, R S, Douwe van Willigen, J

    Published in Stain technology (1988)
    “…A simple quantitative modification of the in toto staining technique for nervous networks of Sihler is described. The results are demonstrated on the…”
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    Journal Article
  14. 14

    Localization of dopamine D2 receptor mRNA with non-radioactive in situ hybridization histochemistry by Brouwer, N, Van Dijken, H, Ruiters, M H, Van Willigen, J D, Ter Horst, G J

    Published in Neuroscience letters (17-08-1992)
    “…A digoxigenin-labeled antisense 42-mer oligonucleotide was used for the localization of the dopamine D2 receptor mRNA in the rat brain. The digoxigenin label…”
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    Journal Article
  15. 15

    Feasibility of Ultrasonic Flow Measurements via Non-Linear Wave Propagation by Massaad, Jack, Van Neer, Paul, Van Willigen, Douwe, De Jong, Nicolaas, Pertijs, Michiel, Verweij, Martin

    “…Typically, ultrasonic flow meters assume linear wave propagation. Nevertheless, if the transducers of an ultrasonic flow sensor excite a pressure wave with a…”
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    Conference Proceeding
  16. 16

    Minimizing the Zero-Flow Error in Transit-Time Ultrasonic Flow Meters by Van Willigen, Douwe, Van Neer, Paul, Massaad, Jack, Verweij, Martin, De Jong, Nicolaas, Pertijs, Michiel

    “…Transit-time ultrasonic flow meters are based on the fundamental idea that the flow is the only non-reciprocal effect between an upstream and downstream…”
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    Conference Proceeding
  17. 17

    A 1.54mW/Element 150μm-Pitch-Matched Receiver ASIC with Element-Level SAR/Shared-Single-Slope Hybrid ADCs for Miniature 3D Ultrasound Probes by Li, Jing, Chen, Zhao, Tan, Mingliang, van Willigen, Douwe, Chen, Chao, Chang, Zu-yao, Noothout, Emile, de Jong, Nico, Verweij, Martin, Pertijs, Michiel

    Published in 2019 Symposium on VLSI Circuits (01-06-2019)
    “…This paper presents an ultrasound receiver ASIC in 180nm CMOS that enables element-level digitization of echo signals in miniature 3D ultrasound probes. It is…”
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    Conference Proceeding
  18. 18

    ASIC Design for a Single-Cable 64-Element Ultrasound Probe by Van Willigen, Douwe, Janjic, Jovana, Kang, Eunchul, Chang, Zu Yao, Noothout, Emile, Verweijl, Martin, Dejong, Nicolaas, Pertijs, Michiel

    “…This paper presents an ASIC (Application Specific Integrated Circuit) design for a catheter probe that interfaces 64 piezoelectric elements directly integrated…”
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    Conference Proceeding
  19. 19