Prof. Kenneth J. Loh Profile

Prof. Kenneth J. Loh

Professor at UC San Diego

SPIE Involvement:

Conference Program Committee | Author

Area of Expertise:

Structural health monitoring , Multifunctional nanocomposites , Soft materials , Stimuli-responsive materials , Wearable sensors , Human performance monitoring

Websites:

Personal Website | Company Website

Publications (37)

Proceedings Article | 8 June 2022 Presentation

Functional human movement assessment using elastic fabric tape sensors and deep learning

Shih-Chao Huang, Xinlun Zhao, Yun-An Lin, Kenneth Loh

Proceedings Volume PC12123, PC121230B (2022) https://doi.org/10.1117/12.2618734

KEYWORDS: Sensors, Human subjects, Neural networks, Nanocomposites, Data acquisition, Chest

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Proceedings Article | 18 April 2022 Presentation

Machine learning based 3D electrical impedance tomography for detecting damage in lattice structures

Yening Shu, Said Quqa, Kenneth Loh

Proceedings Volume PC12047, (2022) https://doi.org/10.1117/12.2612739

KEYWORDS: Machine learning, Tomography, Nondestructive evaluation, Reconstruction algorithms, Electrodes, Additive manufacturing, 3D metrology, 3D acquisition, Visualization, Ultrasonography

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Proceedings Article | 18 April 2022 Presentation

Automatic compensation of temperature effects in motion tape wearable fabric sensors

Yun-An Lin, Jacob Watson, Kenneth Loh

Proceedings Volume PC12045, PC1204502 (2022) https://doi.org/10.1117/12.2612774

KEYWORDS: Sensors, Wheatstone bridges, Nanocomposites, Temperature metrology, Structural health monitoring, Motion measurement, Humidity, Environmental sensing

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Proceedings Article | 22 April 2021 Presentation + Paper

Pressure mapping using a nanocomposite Smartfoam and electrical impedance tomography

Sijia Li, Yun-An Lin, Kenneth Loh

Proceedings Volume 11590, 1159007 (2021) https://doi.org/10.1117/12.2582872

KEYWORDS: Foam, Nanocomposites, Tomography, Medicine, Injuries, Electrodes, Data acquisition, Transducers, Thin films, Spinal cord

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Proceedings Article | 31 March 2021 Presentation + Paper

Active scour monitoring using ultrasonic time-domain reflectometry to detect a soil interface

Morgan Funderburk, Michael Todd, Anton Netchaev, Kenneth Loh

Proceedings Volume 11591, 1159113 (2021) https://doi.org/10.1117/12.2582457

KEYWORDS: Ultrasonics, Reflectometry, Wave propagation, Sensors, Microsoft Foundation Class Library, Interfaces, Aluminum, Soil science, Safety, Composites

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Proceedings Article | 24 March 2021 Presentation

Wearable sensors for enhanced warfighter protection and performance

Kenneth Loh

Proceedings Volume 11591, 1159104 (2021) https://doi.org/10.1117/12.2584994

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Proceedings Article | 22 March 2021 Poster + Presentation + Paper

Graphene kinesiology tape for monitoring distributed human movements of the ankle-foot complex

Yun-An Lin, Xinlun Zhao, Amy Silder, Pinata Sessoms, John Fraser, Kenneth Loh

Proceedings Volume 11590, 115900U (2021) https://doi.org/10.1117/12.2582873

KEYWORDS: Sensors, Graphene, Virtual reality, Thin films, Sensing systems, Medicine, Electronic components

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Proceedings Article | 22 March 2021 Presentation + Paper

Controlling 3D deformations of bio-inspired active skins through designed geometrical imperfections

Yujin Park, Kenneth Loh

Proceedings Volume 11589, 1158906 (2021) https://doi.org/10.1117/12.2586226

KEYWORDS: Skin, Biomimetics, Metamaterials, Organisms, Nonlinear response, Natural surfaces, Camouflage, Adhesives

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Proceedings Article | 1 April 2019 Presentation + Paper

Enhancing the imaging performance of electrical capacitance tomography for monitoring osseointegrated prostheses

Sumit Gupta, Tianjiao Zhang, Kenneth Loh

Proceedings Volume 10970, 109701F (2019) https://doi.org/10.1117/12.2515406

KEYWORDS: Electrodes, Capacitance, Thin films, Tissues, Tomography, Interfaces, Inverse problems, Image resolution, Nanocomposites, Algorithm development

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Proceedings Article | 29 March 2019 Paper

Topological design of carbon nanotube-based nanocomposites for strain sensing

Long Wang, Gianmarco Vella, Kenneth Loh

Proceedings Volume 10968, 109680K (2019) https://doi.org/10.1117/12.2517878

KEYWORDS: Nanocomposites, Thin films, Computer aided design, Resistance, Sensors, Electromechanical design, Carbon, Carbon nanotubes

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Proceedings Article | 27 March 2019 Paper

Large area distributed strain monitoring using patterned nanocomposite sensing meshes

Gianmarco Vella, Sumit Gupta, Kenneth Loh, Anton Netchaev

Proceedings Volume 10970, 109702E (2019) https://doi.org/10.1117/12.2514112

KEYWORDS: Thin films, Electrodes, Finite element methods, Nanocomposites, Resistance, Sensors, Numerical simulations, Structural health monitoring, Inverse problems

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Proceedings Article | 27 March 2018 Paper

Actuation of soft materials through ultrasonic atomization

Han-Joo Lee, Morgan Funderburk, Kenneth Loh

Proceedings Volume 10593, 105930Z (2018) https://doi.org/10.1117/12.2296627

KEYWORDS: Ultrasonics, Transducers, Liquids, Robotics, Wave propagation, Capillaries, Temperature metrology, Actuators

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Proceedings Article | 27 March 2018 Paper

A planar array capacitive imaging system for detecting damage in composite structures: a numerical study

Sumit Gupta, Kenneth Loh

Proceedings Volume 10598, 105980H (2018) https://doi.org/10.1117/12.2296462

KEYWORDS: Electrodes, Composites, Capacitance, Inverse problems, Visualization, Fiber reinforced polymers, Nondestructive evaluation, Inspection, Imaging systems, Finite element methods

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Fiber-reinforced polymer (FRP) composites are widely used in the aerospace industry, but they are also susceptible to different types of damage. In particular, impact is a serious concern, since they can cause subsurface damage that can be hidden from visual inspection and jeopardize structural safety and performance. In addition, the complex geometries of FRP components can limit the use of current nondestructive inspection techniques. Thus, the objective of this study is to develop a portable, noncontact, surface scanning tool for technicians to rapidly detect, characterize, and localize subsurface structural features and damage in structural components. The technique is centered around the theory of electrical capacitance tomography (ECT). Unlike conventional ECT, an array of noncontact electrodes is arranged in a planar fashion. Electric field is propagated between electrodes to interrogate the sensing region, which is defined as the region of space underneath the plane of electrodes. Meanwhile, the corresponding mutual capacitance between excitation and other electrodes are measured. The recorded datasets are then used as inputs to solve the ECT inverse problem in which the electrical permittivity of the 3D sensing region can be reconstructed. In this work, numerical modeling was employed to demonstrate the sensing performance of the planar array capacitive imaging system. First, several composite components with different types of damage were simulated using finite element modeling. Damage was introduced by selectively changing the electrical permittivity at different regions. Second, the planar capacitive electrode array, which was placed near the composite component, was also modeled. Electric field was propagated between different electrodes while the corresponding mutual capacitance of other electrodes were determined. The simulated data was then used as inputs to solve the ECT inverse problem. The numerical simulation results showed that the planar array capacitive imaging system was able to detect, quantify, and locate damage-induced changes in electrical permittivity distributions in composite structures, thereby demonstrating its potential for use as a nondestructive inspection tool.

Proceedings Article | 27 March 2018 Presentation + Paper

Shaking table tests for evaluating the damage features under earthquake excitations using smartphones

Xuefeng Zhao, Ruicong Han, Kenneth Loh, Botao Xie, Jinke Lie, Jinping Ou

Proceedings Volume 10600, 106000L (2018) https://doi.org/10.1117/12.2296501

KEYWORDS: Earthquakes, Sensors, Structural health monitoring, Data integration, Video, Structural monitoring, Transducers, Civil engineering

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Proceedings Article | 19 April 2017 Presentation + Paper

Comparison of electrical impedance tomography inverse solver approaches for damage sensing

Yingjun Zhao, Long Wang, Sumit Gupta, Kenneth Loh, Martin Schagerl

Proceedings Volume 10169, 1016915 (2017) https://doi.org/10.1117/12.2260880

KEYWORDS: Tomography, Sensors, Inverse problems, Structural health monitoring, Carbon nanotubes, Thin films, Compressed sensing, Reconstruction algorithms, Spatial resolution, Intelligence systems, Electrodes, Inspection, Signal to noise ratio, Nondestructive evaluation, Transducers, Visualization

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Proceedings Article | 19 April 2017 Paper

Research on multi-parameter monitoring of steel frame shaking-table test using smartphone

Ruicong Han, Kenneth Loh, Xuefeng Zhao, Yan Yu

Proceedings Volume 10169, 101692O (2017) https://doi.org/10.1117/12.2258749

KEYWORDS: Magnetism, Sensors, Structural health monitoring, Buildings, Earthquakes, Safety, Data storage, Information operations

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Proceedings Article | 12 April 2017 Paper

Noncontact tomography and a pH-sensitive nanocomposite for monitoring osseointegrated prosthesis interfaces

Sumit Gupta, Kenneth Loh

Proceedings Volume 10168, 101681K (2017) https://doi.org/10.1117/12.2258212

KEYWORDS: Tomography, Nanocomposites, Damage detection, Electrodes, Structural sensing, Capacitance, Sensing systems, Inverse problems, Nondestructive evaluation, Biomedical engineering, Thin films, Interfaces, Tissues, Dielectrics, Capacitors, Aluminum

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Proceedings Article | 1 April 2016 Paper

Sensing human physiological response using wearable carbon nanotube-based fabrics

Long Wang, Kenneth Loh, Helen Koo

Proceedings Volume 9805, 98051X (2016) https://doi.org/10.1117/12.2219519

KEYWORDS: Sensors, Carbon nanotubes, Sensing systems, Nanocomposites, Nanotechnology, Motion detection, Motion measurement, Signal detection, Carbon nanotubes, Polymer thin films, Resistance, Thin films, Human subjects, Radon, Adhesives, Electromechanical design

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Proceedings Article | 3 April 2015 Paper

Development of a portable electrical impedance tomography data acquisition system for near-real-time spatial sensing

Shieh-Kung Huang, Kenneth Loh

Proceedings Volume 9435, 94350E (2015) https://doi.org/10.1117/12.2083946

KEYWORDS: Data acquisition, Electrodes, Skin, Copper, Sensing systems, Thin films, Tomography, Prototyping, Switching, Structural health monitoring

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Proceedings Article | 10 April 2014 Paper

In situ phase change characterization of PVDF thin films using Raman spectroscopy

Miranda Riosbaas, Kenneth Loh, Greg O'Bryan, Bryan Loyola

Proceedings Volume 9061, 90610Z (2014) https://doi.org/10.1117/12.2045430

KEYWORDS: Raman spectroscopy, Ferroelectric polymers, Thin films, Digital image correlation, Sensors, Chemical species, Light scattering, Raman scattering, Polymers, Rayleigh scattering

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Proceedings Article | 10 April 2014 Paper

Operational model updating of spinning finite element models for HAWT blades

Antonio Velazquez, R. Andrew Swartz, Kenneth Loh, Yingjun Zhao, Valeria La Saponara, Robert Kamisky, Cornelis van Dam

Proceedings Volume 9061, 90610U (2014) https://doi.org/10.1117/12.2046434

KEYWORDS: Data modeling, Structural health monitoring, Algorithms, Stochastic processes, Matrices, Systems modeling, System identification, Wind energy, Process modeling, Wind turbine technology

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Proceedings Article | 10 April 2014 Paper

Modeling the electromechanical and strain response of carbon nanotube-based nanocomposites

Bo Mi Lee, Kenneth Loh, Andrew Burton, Bryan Loyola

Proceedings Volume 9061, 906117 (2014) https://doi.org/10.1117/12.2044566

KEYWORDS: Resistance, Nanocomposites, Polymers, Composites, Thin films, Carbon nanotubes, Data modeling, Single walled carbon nanotubes, MATLAB, Computer simulations

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Proceedings Article | 9 March 2014 Paper

Photoactive and self-sensing P3HT-based thin films for strain and corrosion monitoring

Donghyeon Ryu, Kenneth Loh

Proceedings Volume 9058, 90580Z (2014) https://doi.org/10.1117/12.2038729

KEYWORDS: Thin films, Corrosion, Structural health monitoring, Optical fabrication, Sensors, System identification, Multifunctional materials, Polymers, Nanolithography, Spectrophotometry

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Proceedings Article | 8 March 2014 Paper

Analyzing the dynamic response of rotating blades in small-scale wind turbines

Wan-Ying Hsiung, Yu-Ting Huang, Chin-Hsiung Loh, Kenneth Loh, Robert Kamisky, Danny Nip, Cornelis van Dam

Proceedings Volume 9061, 90612A (2014) https://doi.org/10.1117/12.2044351

KEYWORDS: Stochastic processes, Earthquakes, Matrices, Data modeling, Spectrum analysis, Sensors, System identification, Signal processing, Lithium, Wind turbine technology

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Proceedings Article | 8 March 2014 Paper

Design and characterization of a piezoelectric sensor for monitoring scour hole evolution

Faezeh Azhari, Caroline Tom, Joseph Benassini, Kenneth Loh, Fabian Bombardelli

Proceedings Volume 9061, 906118 (2014) https://doi.org/10.1117/12.2044391

KEYWORDS: Sensors, Bridges, Ferroelectric polymers, Fiber optics sensors, Reliability, Sensor performance, Magnetic sensors, Transducers, Fiber Bragg gratings, Safety

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Proceedings Article | 3 April 2012 Paper

Enhancing the piezoelectric performance of PVDF-TrFE thin films using zinc oxide nanoparticles

John Dodds, Frederick Meyers, Kenneth Loh

Proceedings Volume 8345, 834515 (2012) https://doi.org/10.1117/12.915072

KEYWORDS: Thin films, Zinc oxide, Nanocomposites, Ferroelectric polymers, Polarization, Nanoparticles, Structural health monitoring, Sensors, Coating, Electrodes

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Proceedings Article | 14 April 2011 Paper

Validation of photocurrent-based strain sensing using a P3HT-based nanocomposite

Donghyeon Ryu, Kenneth Loh, Frank Yaghmaie

Proceedings Volume 7981, 79810G (2011) https://doi.org/10.1117/12.881180

KEYWORDS: Thin films, Nanocomposites, Sensors, Polymers, Coating, Carbon nanotubes, Nanolithography, Positron emission tomography, Fiber optics sensors, Remote sensing

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Proceedings Article | 13 April 2011 Paper

Static and dynamic strain monitoring of GFRP composites using carbon nanotube thin films

Bryan Loyola, Kenneth Loh, Valeria La Saponara

Proceedings Volume 7981, 798108 (2011) https://doi.org/10.1117/12.881006

KEYWORDS: Thin films, Composites, Resistance, Remote sensing, Sensors, Fiber reinforced polymers, Circuit switching, Carbon nanotubes, Data modeling, Glasses

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Proceedings Article | 1 April 2010 Paper

Passive wireless sensors for monitoring particle movement at soil-structure interfaces

Bogdan Liea, Kenneth Loh

Proceedings Volume 7647, 76470F (2010) https://doi.org/10.1117/12.847271

KEYWORDS: Sensors, Antennas, Interfaces, Particles, Inductive coupling, Inductance, Soil science, Transponders, Resistance, Magnetism

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Proceedings Article | 25 March 2010 Paper

Characterizing the self-sensing performance of carbon nanotube-enhanced fiber-reinforced polymers

Bryan Loyola, Valeria La Saponara, Kenneth Loh

Proceedings Volume 7649, 76490F (2010) https://doi.org/10.1117/12.848712

KEYWORDS: Thin films, Resistance, Nanocomposites, Composites, Glasses, Fiber reinforced polymers, Carbon, Electrodes, Dielectric spectroscopy, Carbon nanotubes

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Proceedings Article | 8 April 2009 Paper

Layer-by-layer carbon nanotube bio-templates for in situ monitoring of the metabolic activity of nitrifying bacteria

Kenneth Loh, Jeremy Guest, Genevieve Ho, Jerome Lynch, Nancy Love

Proceedings Volume 7295, 72951T (2009) https://doi.org/10.1117/12.815995

KEYWORDS: Nanocomposites, Resistance, Thin films, Sensors, Bacteria, Electrodes, Environmental sensing, Oxygen, Environmental monitoring, Carbon nanotubes

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Proceedings Article | 8 April 2008 Paper

Piezoelectric polymeric thin films tuned by carbon nanotube fillers

Junhee Kim, Kenneth Loh, Jerome Lynch

Proceedings Volume 6932, 693232 (2008) https://doi.org/10.1117/12.774256

KEYWORDS: Composites, Ferroelectric polymers, Dielectric polarization, Dielectrics, Crystals, Polymers, Thin films, Polymer thin films, Scanning electron microscopy, Single walled carbon nanotubes

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Proceedings Article | 8 April 2008 Paper

Spatial structural sensing by carbon nanotube-based skins

Kenneth Loh, Tsung-Chin Hou, Jerome Lynch, Nicholas Kotov

Proceedings Volume 6932, 693207 (2008) https://doi.org/10.1117/12.776564

KEYWORDS: Skin, Corrosion, Electrodes, Nanocomposites, Sensors, Carbon, Structural health monitoring, Aluminum, Finite element methods, Chemical elements

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Proceedings Article | 10 April 2007 Paper

Electrical impedance tomography of carbon nanotube composite materials

Tsung-Chin Hou, Kenneth Loh, Jerome Lynch

Proceedings Volume 6529, 652926 (2007) https://doi.org/10.1117/12.715663

KEYWORDS: Thin films, Carbon nanotubes, Composites, Nanolithography, Tomography, Single walled carbon nanotubes, Associative arrays, Electrodes, Sensors, Data acquisition

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Proceedings Article | 10 April 2007 Paper

Passive wireless strain and pH sensing using carbon nanotube-gold nanocomposite thin films

Kenneth Loh, Jerome Lynch, Nicholas Kotov

Proceedings Volume 6529, 652919 (2007) https://doi.org/10.1117/12.715826

KEYWORDS: Sensors, Thin films, Antennas, Resistance, Capacitance, Nanocomposites, Capacitors, Carbon, Nanolithography, Inductance

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Proceedings Article | 11 April 2006 Paper

Mechanical-electrical characterization of carbon-nanotube thin films for structural monitoring applications

Kenneth Loh, Jerome Lynch, Nicholas Kotov

Proceedings Volume 6174, 61741Z (2006) https://doi.org/10.1117/12.658896

KEYWORDS: Thin films, Single walled carbon nanotubes, Sensors, Resistance, Carbon nanotubes, Structural monitoring, Nanolithography, Metals, Polymers, Microelectromechanical systems

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Proceedings Article | 21 July 2004 Paper

Real-time visualization of bridge structural response through wireless MEMS sensors

Hung-Chi Chung, Tomoyuki Enomoto, Kenneth Loh, Masanobu Shinozuka

Proceedings Volume 5392, (2004) https://doi.org/10.1117/12.539263

KEYWORDS: Sensors, Bridges, Microelectromechanical systems, Silicon, Data acquisition, Magnesium, Wireless communications, Visualization, Computer simulations, Molecular bridges

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Showing 5 of 37 publications

Conference Committee Involvement (25)

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024

25 March 2024 | Long Beach, California, United States

Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVIII

25 March 2024 | Long Beach, California, United States

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

13 March 2023 | Long Beach, California, United States

Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVII

13 March 2023 | Long Beach, California, United States

Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI

7 March 2022 | Long Beach, California, United States