Development of a Mechanical Scanning-type Intravascular Ultrasound System Using a Miniature Ultrasound Motor

Tanabe, Mitsuaki; Xie, Shang‐Ping; Tagawa, Norio; Moriya, Tadashi; Furukawa, Yuji

doi:10.1143/jjap.46.4805

Cited by 28 publications

(22 citation statements)

References 5 publications

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“…The spherical ultrasonic motor using wire stator has spiral shape, and the wire has a function as a stator. The driving principle is similar to the coil type ultrasonic motor [11]. The traveling wave is generated by adding ultrasonic vibration to the integrated waveguide and the wire stator.…”

Section: Spherical Ultrasonic Motor Using Wire Statorsmentioning

confidence: 99%

Development of miniature spherical ultrasonic motor using wire stators

Wang¹,

Nishizawa²,

Tanaka³

et al. 2018

J. vibroeng.

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The purpose of this study is to develop a miniature motor for directional adjustment of a vascular endoscopic camera. Spherical ultrasonic motor not affected by magnetic fields is used in the miniature motor. The characteristic of spherical ultrasonic motor is that one motor has multi degree of freedom in rotational direction. Wire is used as stator to realize miniaturization of the motor, so it is called miniature spherical ultrasonic motor using wire stators. Firstly, the pressing force between a stator and a spherical rotor is discussed, which is important for developing a miniature spherical ultrasonic motor using wire stators. As a result, it can be clarified that there is an optimum value for the pressing force. Secondly, the starting torque is investigated, which is one characteristic of the miniature spherical ultrasonic motor using wire stators. The relationship between the frequency and amplitude of the applied AC voltage and the starting torque is clarified. Finally, the control method of the rotational direction of a miniature spherical ultrasonic motor using wire stators is discussed. A PWM control method is proposed to control the rotational direction of an ultrasonic motor. In this PWM control, traveling wave and standing wave generated on a wire stator are used. Experimental results show that the proposed method is effective.

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Section: Spherical Ultrasonic Motor Using Wire Statorsmentioning

confidence: 99%

Development of miniature spherical ultrasonic motor using wire stators

Wang¹,

Nishizawa²,

Tanaka³

et al. 2018

J. vibroeng.

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show abstract

“…Scattering [359][360][361][362][363][364] Ultrasonic transducers (piezoelectric effect) and its attachments [375][376][377][378][379][380][381] Acoustic field measurement and control [382][383][384][385][386] Blood flow measurement [394][395][396][397] Tissue characterization Velocity [125][126][127][128][129][130][131][132][133][134][406][407][408]420,422) Displacement 409,413,425) Thickness 399,418) Viscoelasticity 398,[401][402][403][404][405][410]…”

Section: General Topicmentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

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Measurementthe act of measuring physical properties that we performhas the potential to contribute to the successful advancement of sciences and society. To open doors in physics and other sciences, various measurement methods and related applications have been developed, and ultrasound has remained a useful probe, power source, and interesting measurement object for the past two centuries. In this paper, we first summarize the basic principles of ultrasound from the viewpoint of measurement techniques for readers who just have started studying or are interested in the field of ultrasonic electronics. Moreover, we also introduce recent studiesultrasonic properties of materials, measurement techniques, piezoelectric devices, nonlinear acoustics, biomedical ultrasound, and ocean acousticsand their trends related to measurement techniques in ultrasonic electronics to provide some ideas for related applications.

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“…Usually, the bending vibration is transmitted along a thin wire, and at the tip, a rotational motion is obtained [4,5]. In this manner, the bending vibrations would be damped easily by being touched from the outside.…”

Section: Introductionmentioning

confidence: 99%