Dr. Daisuke Iba Profile

Dr. Daisuke Iba

Professor at Kyoto Institute of Technology

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Publications (27)

Proceedings Article | 9 May 2024 Presentation + Paper

Gear health monitoring using smart gears with printed sensor/antenna circuits by running tests

N. Fujita, D. Iba, A. Sakai, H. Shimasaki, J. Hongu, H. Kimura, A. Nishikawa

Proceedings Volume 12949, 129490W (2024) https://doi.org/10.1117/12.3010694

KEYWORDS: Antennas, Sensors, Printing, Teeth, Electrical conductivity, Sputter deposition, Network security, Resistance, Plastics, Deformation

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Proceedings Article | 18 April 2022 Presentation + Paper

Effect of temperature on the magnetically coupled return loss of smart gear system

T. Inoue, D. Iba, T. T. Mac, S. Mukai, N. Fujita, R. Takahashi, N. Miura, T. Iizuka, A. Masuda, A. Sone, I. Moriwaki

Proceedings Volume 12046, 120460V (2022) https://doi.org/10.1117/12.2612789

KEYWORDS: Signal attenuation, Antennas, Sensors, Inductive coupling, Temperature metrology, Signal processing, Network security, Thermal imaging cameras, Thermography, Laser sintering

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In our project, a novel gear health monitoring system called a “smart gear sensor system” has been being developed. This system has a smart gear sensor and a monitoring antenna. The smart gear sensor has been created by using a laser sintering technique that allows a conductive ink to be sintered directly on the gear surface to form a sensor chain. This technique is also used to form an antenna pattern of the monitoring antenna. Experimentally, when the smart gear with the integrated sensor chain is brought parallelly close to the monitoring antenna while this antenna is connected to a network analyzer, a magnetic coupling happens. This wireless magnetic coupling is presented via the return loss signal gained by the network analyzer. Moreover, the conductivity of the sensor chain on the smart gear has been proven to affect the magnetically coupled return loss signal. Specifically, the shape of the return loss signal will be changed correspondingly. Since the sensor chain is sintered directly on the surface of the gear, the physical characteristics of the gear such as healthy or cracked will result in the quality of the sensor conductivity. Therefore, the smart gear's healthy or cracked characteristics can be observed via the return loss signal chart obtained by the network analyzer. In other words, the return loss signal can be considered essential data for the gear health monitoring process. Nevertheless, because the temperature will have a certain influence on the physical state of not only the gear but also the sintered sensor, the evaluation of the temperature to the magnetic coupling and its return loss signal becomes unavoidable. As a result, this study focuses majorly on the consideration of the influence of the temperature so that the accuracy of the proposed gear health monitoring method can be improved. The final experimental result and analysis demonstrate that the temperature also significantly impacts the return loss of the smart gear system.

Proceedings Article | 22 March 2021 Presentation + Paper

Effect of phase fluctuation at high speed of smart gear on return loss of receiver antenna

T. Mac, D. Iba, Y. Matsushita, S. Mukai, T. Inoue, A. Fukushima, N. Miura, T. Iizuka, A. Masuda, I. Moriwaki

Proceedings Volume 11591, 115910E (2021) https://doi.org/10.1117/12.2582468

KEYWORDS: Antennas, Receivers, Sensors, Signal attenuation, Signal detection, Phase shifts, Magnetism

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Proceedings Article | 22 March 2021 Presentation + Paper

An improvement of visualized images from vibration for plastic gear early failure detection using convolutional neural network

D. Taga, D. Iba, B. H. Kien, Y. Tsutsui, N. Miura, T. Iizuka, A. Masuda, I. Moriwaki

Proceedings Volume 11593, 115932N (2021) https://doi.org/10.1117/12.2582637

KEYWORDS: Visualization, Convolutional neural networks, Image visualization

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Proceedings Article | 22 April 2020 Presentation + Paper

Effect of image size on performance of a plastic gear crack detection system based convolutional neural networks: an experimental study

B. Kien, D. Iba, Y. Tsutsui, A. Kajihata, Y. Lei, N. Miura, T. Iizuka, A. Masuda, A. Sone, I. Moriwaki

Proceedings Volume 11381, 113812I (2020) https://doi.org/10.1117/12.2557977

KEYWORDS: Visualization, Image visualization, Image quality, Image classification, Convolutional neural networks, Feature extraction, Image resolution, Image processing, Data acquisition, Data conversion

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Proceedings Article | 21 March 2019 Paper

Active mass damper using phase and amplitude of mean field of oscillators

J. Hongu, D. Iba, T. Wada

Proceedings Volume 10967, 109672O (2019) https://doi.org/10.1117/12.2515179

KEYWORDS: Oscillators, Control systems, Buildings, Filtering (signal processing), Earthquakes, Mathematical modeling, Active vibration control, Vibration control, Motion models, Numerical simulations

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Proceedings Article | 18 March 2019 Paper

Vibration analysis of a meshing gear pair by neural network (Visualization of meshing vibration and detection of a crack at tooth root by VGG16 with transfer learning)

D. Iba, Y. Ishii, Y. Tsutsui, N. Miura, T. Iizuka, A. Masuda, A. Sone, I. Moriwaki

Proceedings Volume 10973, 109730Y (2019) https://doi.org/10.1117/12.2514250

KEYWORDS: Convolutional neural networks, Neural networks, Failure analysis, High speed cameras, Data acquisition

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Proceedings Article | 18 March 2019 Paper

Development of smart gear system by conductive-ink print (impedance variation of a gear sensor with loads and data transmission from an antenna)

D. Iba, S. Futagawa, N. Miura, T. Iizuka, A. Masuda, A. Sone, I. Moriwaki

Proceedings Volume 10973, 1097309 (2019) https://doi.org/10.1117/12.2515339

KEYWORDS: Antennas, Sensors, Teeth, Laser sintering, Smart sensors

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Proceedings Article | 27 March 2018 Paper

Conductive ink print on PA66 gear for manufacturing condition monitoring sensors

Shintaro Futagawa, Daisuke Iba, Takahiro Kamimoto, Morimasa Nakamura, Nanako Miura, Takashi Iizuka, Arata Masuda, Akira Sone, Ichiro Moriwaki

Proceedings Volume 10602, 106020R (2018) https://doi.org/10.1117/12.2295771

KEYWORDS: Sensors, Laser sintering, Printing, Coating

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Proceedings Article | 27 March 2018 Presentation + Paper

Output analysis of swarm of neural oscillators stimulated by earthquake-induced acceleration responses of a structure

Hideya Tokumura, Daisuke Iba, Jyunichi Hongu, Sohei Shima, Ichiro Moriwaki

Proceedings Volume 10598, 105982T (2018) https://doi.org/10.1117/12.2296522

KEYWORDS: Oscillators, Earthquakes, Control systems, Buildings, Neurons, Neural networks

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Proceedings Article | 15 March 2018 Presentation + Paper

Active mass damper system for high-rise buildings using neural oscillator and position controller: generation method for desired stroke of auxiliary mass using synchronous detection

J. Hongu, D. Iba

Proceedings Volume 10595, 1059522 (2018) https://doi.org/10.1117/12.2296575

KEYWORDS: Oscillators, Control systems, Earthquakes, Buildings, Signal processing, Numerical simulations, Motion models, Switches, Mathematical modeling, Linear filtering

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Proceedings Article | 12 April 2017 Paper

Active mass damper system for high-rise buildings using neural oscillator and position controller: sinusoidally varying desired displacement of auxiliary mass intended for reduction of maximum control force

D. Iba, J. Hongu, T. Sasaki, S. Shima, M. Nakamura, I. Moriwaki

Proceedings Volume 10168, 101683F (2017) https://doi.org/10.1117/12.2259863

KEYWORDS: Control systems, Oscillators, Biomimetics, Buildings, Vibration control, Numerical simulations, Earthquakes, Mathematical modeling, Motion models, Sensors, Systems modeling

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Proceedings Article | 12 April 2017 Paper

Development of sensing systems printed with conductive ink on gear surfaces: manufacturing of meander line antenna by laser-sintered silver nano-particles

D. Iba, S. Futagawa, T. Kamimoto, M. Nakamura, N. Miura, T. Iizuka, A. Masuda, A. Sone, I. Moriwaki

Proceedings Volume 10168, 101683G (2017) https://doi.org/10.1117/12.2259864

KEYWORDS: Sensors, Antennas, Manufacturing, Printing, Sensing systems, Laser sintering, Nonimpact printing, Resistance, Laser development, Scanning electron microscopy

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Proceedings Article | 20 April 2016 Paper

Development of three-axis inkjet printer for gear sensors

Daisuke Iba, Ricardo Rodriguez Lopez, Takahiro Kamimoto, Morimasa Nakamura, Nanako Miura, Takashi Iizuka, Arata Masuda, Ichiro Moriwaki, Akira Sone

Proceedings Volume 9803, 98034F (2016) https://doi.org/10.1117/12.2218951

KEYWORDS: Sensors, Printing, Electronic circuits, Laser sintering, Resistance, Optical microscopes, Manufacturing, Laser processing, Laser systems engineering

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Proceedings Article | 15 April 2016 Paper

Active mass damper system for high-rise buildings using neural oscillator and position controller considering stroke limitation of the auxiliary mass

J. Hongu, D. Iba, M. Nakamura, I. Moriwaki

Proceedings Volume 9799, 97993A (2016) https://doi.org/10.1117/12.2219116

KEYWORDS: Oscillators, Buildings, Control systems, Earthquakes, Numerical simulations, Vibration isolation, Solids, Electroluminescence, Control systems design, Mathematical modeling, Systems modeling, Vibration control

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Proceedings Article | 27 March 2015 Paper

A driven active mass damper by using output of a neural oscillator (effects of position control system changes on vibration mitigation performance)

J. Hongu, D. Iba, T. Sasaki, M. Nakamura, I. Moriwaki

Proceedings Volume 9435, 943510 (2015) https://doi.org/10.1117/12.2084206

KEYWORDS: Oscillators, Control systems, Control systems design, Energy efficiency, Numerical simulations, Earthquakes, Solids, Buildings, Mathematical modeling, Systems modeling

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Proceedings Article | 8 March 2014 Paper

Experimental evaluation of a neural-oscillator-driven active mass damper system

Daisuke Iba, Junichi Hongu

Proceedings Volume 9061, 90613M (2014) https://doi.org/10.1117/12.2045019

KEYWORDS: Oscillators, Control systems, Sensors, Dynamical systems, Earthquakes, Motion measurement, Buildings, Mathematical modeling, Vibration control, Laser development

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Proceedings Article | 19 April 2013 Paper

Evaluation method for a controller of active mass damper using central pattern generator

Junichi Hongu, Daisuke Iba, Morimasa Nakamura, Ichiro Moriwaki

Proceedings Volume 8692, 869230 (2013) https://doi.org/10.1117/12.2009720

KEYWORDS: Oscillators, Mode locking, Earthquakes, Mathematical modeling, Motion models, Ions, Reliability, Robots, Solids, Analytical research

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Proceedings Article | 19 April 2013 Paper

Semi-active vibration control with harmonically varying damping (application to serial TDOF system and filtering using the Stuart-Landau equation)

Satoshi Hirohata, Daisuke Iba

Proceedings Volume 8692, 869244 (2013) https://doi.org/10.1117/12.2009639

KEYWORDS: Oscillators, Nonlinear filtering, Vibration control, Control systems, Numerical simulations, Solids, Differential equations, Systems modeling, Linear filtering, Fourier transforms

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Proceedings Article | 6 April 2012 Paper

Frequency response analysis of multi-degree-of-freedom system with harmonically varying damping

Satoshi Hirohata, Daisuke Iba

Proceedings Volume 8345, 83453R (2012) https://doi.org/10.1117/12.915041

KEYWORDS: Control systems, Numerical simulations, Modulation, Analytical research, Phase shift keying, Transmission electron microscopy, Neodymium, Applied research, Switching, Systems modeling

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Proceedings Article | 3 April 2012 Paper

Mutual synchronization between structure and central pattern generator

Junichi Hongu, Daisuke Iba

Proceedings Volume 8345, 83451E (2012) https://doi.org/10.1117/12.915045

KEYWORDS: Oscillators, Numerical simulations, Tongue, Earthquakes, Mathematical modeling, Reliability, Robots, Sensors, Neurons, Control systems

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Proceedings Article | 18 April 2011 Paper

Structural vibration control by tuned mass damper using central pattern generator

Daisuke Iba, Junichi Hongu

Proceedings Volume 7981, 79814Q (2011) https://doi.org/10.1117/12.880406

KEYWORDS: Oscillators, Neurons, Control systems, Numerical simulations, Vibration control, Mathematical modeling, Earthquakes, Buildings, Bridges, Brain

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Proceedings Article | 9 April 2010 Paper

Detection and localization of contact-type damages via nonlinear impedance modulation of piezoelectric materials bonded on a beam structure

Arata Masuda, Junsuke Aoki, Daisuke Iba, Akira Sone

Proceedings Volume 7650, 765034 (2010) https://doi.org/10.1117/12.848450

KEYWORDS: Modulation, Nondestructive evaluation, Interfaces, Structural health monitoring, Damage detection, Sensors, Acoustics, Ferroelectric materials, Scattering, Complex systems

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In this paper, a nondestructive, in-service structural integrity monitoring methodology that can detect and characterize local structural damages of contact-type, i.e. damages and failures which come along with generation, growth and/or changes of contacting surfaces, such as cracks, debonding, preload-loss in bolted joints, etc., is presented. The presented monitoring system consists of piezoelectric elements bonded on the structural surface, a high-frequency harmonic voltage source, and a current detector. When the structure is subjected to a vibrational load such as operational load at low-frequencies, the scattering conditions for the high-frequency elastic waves in the vicinity of the contact-type damages will change in synchronization with the structural vibration because of the fluctuation of the contact conditions. This nonlinear effects of vibro-acoustic interaction between the low-frequency vibration and the high-frequency wave field causes the change in the driving-point impedance of the structure at the high frequency range, which leads to the significant modulation of the coupled electro-mechanical impedance (or admittance) of the piezoelectric elements. Therefore, if the piezoelectric elements are driven by a fixed amplitude high-frequency harmonic voltage source, the nonlinear fluctuation of the coupled admittance can be observed as the amplitude and phase modulation of the current flowing through the piezoelectric element. A modeling and analytical study of the nonlinear piezoelectric impedance modulation is presented for a beam structure including a crack, utilizing a linear time-varying system theory. A damage evaluation measure is presented based on the dimensionless modal stiffness fluctuation estimated from the instantaneous admittance reconstructed from the demodulated current responses. Furthermore, fundamental strategies and future directions for damage localization based on the nonlinear piezoelectric impedance modulation are briefly discussed.

Proceedings Article | 8 April 2009 Paper

Nonlinear piezoelectric impedance modulation and its application to crack detection

Arata Masuda, Tomohiro Shinagawa, Daisuke Iba, Akira Sone

Proceedings Volume 7295, 72951X (2009) https://doi.org/10.1117/12.815900

KEYWORDS: Modulation, Structural health monitoring, Ferroelectric materials, Sensors, Phase shift keying, Phase modulation, Interfaces, Ultrasonics, Spectroscopy, Scattering

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Proceedings Article | 18 April 2008 Paper

Frequency response analysis of vibration system with parametric excitation of damping coefficient

Daisuke Iba, Arata Masuda, Akira Sone

Proceedings Volume 6928, 692821 (2008) https://doi.org/10.1117/12.775997

KEYWORDS: Analytical research, Motion models, Numerical analysis, Xenon, Numerical simulations, Simulink, Systems engineering, Actuators, Smart structures, System integration

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Proceedings Article | 27 April 2007 Paper

Generation of quasi-resonance by variable damping

Daisuke Iba, Arata Masuda, Akira Sone

Proceedings Volume 6525, 652510 (2007) https://doi.org/10.1117/12.715539

KEYWORDS: Numerical analysis, Motion models, Vibration simulation, Numerical simulations, Simulink, Systems engineering, Smart structures, System integration, Systems modeling, Vibration control

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Proceedings Article | 10 April 2007 Paper

Monitoring and evaluation of cracked beams based on nonlinear wave modulation

Arata Masuda, Tomohiro Shinagawa, Satoshi Maekawa, Yohei Kinugawa, Daisuke Iba, Akira Sone

Proceedings Volume 6530, 65301E (2007) https://doi.org/10.1117/12.715994

KEYWORDS: Modulation, Ferroelectric materials, Phase shift keying, Receivers, Phase modulation, Transducers, Interfaces, Ultrasonics, Amplitude modulation, Transmitters

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Showing 5 of 27 publications

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