Shad Roundy portrait
  • Adjunct Associate Professor, Elect & Computer Engineering
  • Associate Professor, Mechanical Engineering
801-581-4304

Publications

  • Danick Briand (date unknown). Briand D., Yeatman E., Roundy, S. Micro Energy Harvesting, Wiley-VCH, Weinheim, Germany. Accepted, .
  • Andersen, E. (date unknown). A Dynamic Transmit Coil for Wirelessly Powering Small ME Transducer based Biomedical Implants. (pp. 212-215). 2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS). Accepted, .
  • Saha, O. (date unknown). Wireless Power Transfer by Self-biased Magnetoelectric Laminate for Biomedical Implants. (pp. 36-39). 2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS). Accepted, .
  • Roundy, S. (date unknown). Inertial Energy Harvesting for Wearables. 2018 IEEE Sensors. Accepted, .
  • Halim, M.A. (date unknown). Modeling and Experimental Analysis of a Wearable Energy Harvester that Exploits Human-Body Motion. 2018 IEEE Sensors. Accepted, .
  • Tiancheng Xue (date unknown). Xue, T., and S. Roundy. 2015. "Analysis of Magnetic Plucking Configurations for Frequency Up-Converting Harvesters." Journal of Physics: Conference Series. Vol. 660. No. 1. IOP Publishing, 2015. Accepted, .
  • Roundy, Shad (date unknown). Roundy, S., Takahashi, E., 2012. “A Cost-effective Planar Electromagnetic Energy Harvesting Transducer”, Technical Digest PowerMEMS 2012 (Atlanta, GA USA 2-5 December 2012) pp. 10-13. Accepted, .
  • Tiancheng Xue (date unknown). Xue, T., Ma, X,. Rahn, C., Roundy, S. “Analysis of Upper Bound Power Output for a Wrist-Worn Rotational Energy Harvester from Real-World Measured Inputs.”. Accepted, .
  • John Heit (date unknown). Heit, J., and S. Roundy. “A Framework for Determining the Maximum Theoretical Power Output for a Given Vibration Energy.”. Accepted, .
  • Christensen, D. (date unknown). Christensen, D., Roundy, S., 2013. “Comparative Study of Bio-implantable Acoustic Generator Architectures”, Journal of Physics: Conference Series. Vol. 476, No. 1, p. 012141, 2013. Accepted, .
  • Yuechuan Yu (date unknown). Yu, Y., Bhola, V., Tathireddy, P., Roundy, S., Young, D. 2015. “Inductive Sensing Technique For Low Power Implantable Hydrogel-Based Biochemical Sensors”. IEEE Sensors, November 1-4, 2015, Busan, South Korea. Accepted, .
  • Basaeri, H. (date unknown). Basaeri, H., Christensen, D., and Roundy, S. 2016. “Ultrasonically Powered Hydrogel-Based Wireless Implantable Glucose Sensor”, IEEE Sensors, Oct. 30 – Nov. 2, 2016, Orlando, FL. Accepted, .
  • Halim, M. A. (date unknown). Fabrication and characterization of a wrist-driven rotational energy harvester using multiple plucked piezoelectric unimorphs. Journal of Physics: Conference Series. Accepted, .
  • Truong, B. D. (date unknown). Experiments on a wireless power transfer system for wearable device with sol-gel thin-film PZT. Journal of Physics: Conference Series. Accepted, .
  • Misra, V. (date unknown). Optimizing the energy balance to achieve autonomous self-powering for vigilant health and IoT applications. Journal of Physics: Conference Series. Accepted, .
  • Sanchez, J. (date unknown). Design and Characterization of a Low-Power Moisture Sensor from Commercially Available Electronics. 2021 IEEE SENSORS. Accepted, .
  • Luo, W. (date unknown). Wireless Power Transfer Through Soil Over a Range of Moisture Levels for In-Situ Soil Health Monitoring. 2021 IEEE SENSORS. Accepted, .
  • Luo, W. (date unknown). RF Coils Characterization in Soil for Wireless Soil Sensing Applications. 2020 IEEE SENSORS. Accepted, .
  • Plaizier, G. M. (date unknown). Design, Modeling, and Analysis of Inductive Resonant Coupling Wireless Power Transfer for Micro Aerial Vehicles (MAVs). 2018 IEEE International Conference on Robotics and Automation (ICRA). Accepted, .
  • Heit, J. (date unknown). Heit, J., Christensen, D., Roundy, S., 2013. “A Vibration Energy Harvesting Structure, Tunable Over a Wide Frequency Range Using Minimal Actuation.” Proceedings of the ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. SMASIS2013 (September 16-18, 2013, Snowbird, Utah, USA). Accepted, .
  • Roundy, Shad (date unknown). Roundy, S., Tola, J., 2013. “An Energy Harvester for Rotating Environments Using Offset Pendulum Dynamics”, Transducers 2013 / Eurosensors XXVII: The 17th International Conference on, pp. 689-692. Accepted, .
  • Truong, B. D. (date unknown). Energy harvesting and wireless power transfer in a unified system for wearable devices. 2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS). Accepted, .
  • Andersen, E (date unknown). Optimal Coil Design for Wireless Powering of Biomedical Implants Considering Safety Constraints. In 2019 IEEE Wireless Power Transfer Conference (WPTC). Accepted, .
  • Heit, J. (date unknown). Heit, J., and Roundy, S., “A Framework to Find the Upper Bound on Power Output as a Function of Input Vibration Parameters”,. Accepted, .
  • Meng, M (date unknown). Multi-Bean Shared-Inductor Reconfigurable Voltage/SECE-Mode Piezoelectric Energy Harvesting of Multi-Axial Human Motion. (pp. 426-428). 2019 IEEE International Solid-State Circuits Conference-(ISSCC). Accepted, .
  • Truong, B. (date unknown). Advanced Topology of Power Electronic Interface for MEMS Energy Harvesting with Multiple Transducers. (pp. 012074). Vol. 1052. Journal of Physics: Conference Series. Accepted, .
  • Truong, B. D. (date unknown). Magnetoelectric wireless power transfer for biomedical implants: Effects of non-uniform magnetic field, alignment and orientation. Sensors and Actuators A: Physical. Accepted, .
  • Truong, B. (date unknown). Wireless power transfer system with center-clamped magneto-mechano-electric (MME) receiver: model validation and efficiency investigation. Smart Materials and Structures. Vol. 28, 015004. Accepted, .
  • Christensen, D. (date unknown). Non-Dimensional Analysis of Depth, Orientation, and Alignment in Acoustic Power Transfer Systems. Smart Materials and Structures. Vol. 27, 125013. Accepted, .
  • Palombo, T. (date unknown). Accurate and objective determination of myalgic encephalomyelitis/chronic fatigue syndrome disease severity with a wearable sensor. Journal of Translational Medicine. Accepted, .
  • Andersen, E. (date unknown). Optimal Transmit Coil Design for Wirelessly Powered Biomedical Implants Considering Magnetic Field Safety Constraints. IEEE Transactions on Electromagnetic Compatibility. Vol. 63, 1735-1747. Accepted, .
  • Truong, B. (date unknown). Analysis of resonance and anti-resonance frequencies in a wireless power transfer system: analytical model and experiments. IEEE Transactions on Circuits and Systems II: Express Briefs. Accepted, .
  • Yu, Y. (date unknown). An in-vitro Study of Wireless Inductive Sensing and Robust Packaging for Future Implantable Hydrogel-based Glucose Monitoring Applications. IEEE Sensors Journal. Accepted, .
  • Eilertsen, M. (date unknown). Characterization of load reduction while lifting drywall using an unpowered drywall lifting device. Work. 1-11. Accepted, .
  • Meng, M. (date unknown). A Multi-Beam Shared-Inductor Reconfigurable Voltage/SECE-Mode Piezoelectric Energy Harvesting Interface Circuit. IEEE Transactions on Biomedical Circuits and Systems. Accepted, .
  • Truong, B. B. (date unknown). Experimentally validated model and analytical investigations on power optimization for piezoelectric-based wireless power transfer systems. Journal of Intelligent Material Systems and Structures. Vol. 30, 2464-2477. Accepted, .
  • Xue, T. (date unknown). System Modeling, Characterization, and Design Considerations for Generators in Commercial Watches With Application to Energy Harvesting for Wearables. IEEE/ASME Transactions on Mechatronics. Vol. 23, 2515-2524. Accepted, .
  • Xue, T. (date unknown). Wearable inertial energy harvester with sputtered bimorph lead zirconate titanate (PZT) thin-film beams. Smart Materials and Structures. Vol. 27, 085026. Accepted, .
  • Yeo, H.G. (date unknown). Strong (001) Oriented Bimorph PZT Film on Metal Foils Grown by rf-Sputtering for Wrist-Worn Piezoelectric Energy Harvesters. Advanced Functional Materials. Vol. 28, 1801327. Accepted, .
  • Rantz, R. (date unknown). Dynamics of Wrist-Worn Eccentric-Rotor Energy Harvesters. Physical Review Applied. Accepted, .
  • Truong, B. D. (date unknown). Experimentally validated model and power optimization of a magnetoelectric wireless power transfer system in free-free configuration. Smart Materials and Structures. Accepted, .
  • Basaeri, H. (date unknown). Acoustic power transfer for biomedical implants using piezoelectric receivers: effects of misalignment and misorientation. Journal of Micromechanics and Microengineering. Vol. 29. Accepted, .
  • Roundy, Shad (date unknown). Roundy, S., Takahashi, E., 2013 “A Planar Electromagnetic Energy Harvesting Transducer Using a Multi-pole Magnetic Plate”, Sensors and Actuators: A Phyisical (195) June 2013, pp. 98–104. Accepted, .
  • David Christensen (date unknown). Christensen, D., Roundy, S., 2016 “Ultrasonically-Powered Piezoelectric Plate and Diaphragm Architectures for Bio-implantable Sensors” Journal of Intelligent Material Systems and Structures. 27.8 (2016): 1092-1105. Accepted, .
  • Rantz, Robert (date unknown). Characterization of Real-world Vibration and Application to Nonlinear Vibration Energy Harvesters. Energy Harvesting and Systems. Vol. 4, 67-76. Accepted, .
  • John Heit (date unknown). Heit, J., Roundy, S., 2015 “A Framework to Determine the Upper Bound on Extractable Power as a Function of Input Vibration Parameters”, Energy Harvesting and Systems, March, 2015, DOI: 10.1515/ehs-2014-0059. Accepted, .
  • Roundy, S. (date unknown). Materials and approaches for on-body energy harvesting. MRS Bulletin. Vol. 43, 206-213. Accepted, .
  • Khan, F. (date unknown). Stretching-induced phase transitions in barium titanate-poly (vinylidene fluoride) flexible composite piezoelectric films. Scripta Materiala. Accepted, .
  • Basaeri, H. (date unknown). A MEMS-Scale Ultrasonic Power Receiver for Biomedical Implants. IEEE Sensors Letters. Vol. 3, 1-4. Accepted, .
  • Roundy, S. (date unknown). Roundy, S., Tola, J., 2014 “An energy harvester for rotating environments using offset pendulum and nonlinear dynamics”. Accepted, .
  • Rupp, T. (date unknown). Magnetoelectric Transducer Designs for Use as Wireless Power Receivers in Wearable and Implantable Applications. Materials. Accepted, .
  • Xue, Tiancheng (date unknown). Xue, T., Roundy, S. 2017. “On magnetic plucking configurations for frequency up-converting mechanical energy harvesters.” Sensors and Actuators A: Physical 253 (2017): 101-111. Accepted, .
  • Bryzek, Janusz (date unknown). MEMS Testing: Transition from Millions to Billtions to Trillions. (pp. 9-11). Chip Scale Review. Accepted, .

Research Statement

My lab’s research is broadly focused on micro-sensors (i.e. MEMS) and energy harvesting (i.e. methods for wireless sensors to harvest their own energy making them battery-free). We have significant current research efforts on harvesting energy from human motion to power wearable sensors and harvesting energy from temperature changes (pyroelectric energy harvesting). We have also done a signficant amount of work on harvesting energy from machine vibrations. These harvesters employ small-scale piezoelectric and electmagnetic energy harvesting. Our energy harvesting work includes methods of wireless power transfer, especially for biomedical implants using both magnetic field transmission and ultrasound.

Our sensing work is currently focused inertial sensing (i.e. accelerometers and gyroscopes) applied to biomedical applications and soil sensing for agricultural applications. We also work on micro-pumps for biomedical applications.

Research Keywords

  • Women's Mental Health
  • Biomedical Research Training

Presentations

  • "Powering the Internet of Things: Perspectives on Energy Harvesting from Motion and Vibrations", Materials Challenges in Alternative & Renewable Energy 2021 (MCARE 2021). , Presented, 2021.
  • "Harvesting Energy from Mechanical Sources Using Piezoelectric Materials", IEEE ISAF. , Presented, 2021.
  • "Energy Harvesting for Wearables: with a Focus on Energy from Motion", presented at the PowerMEMS School, Krakow, Poland. , Presented, 2019.
  • "Inertial Energy Harvesting for Wearables", Presented at IEEE Sensors, Dehli, India. , Presented, 2018.
  • Powering the Internet of Things. , Presented, 2018.
  • Self-Powered Wearable Sensing: What is the current state of the art and what is achievable? Presented at Seoul National University. , Presented, 2018.
  • Self-Powered Wearable Sensing: What is the current state of the art and what is achievable? Presented at the University of North Texas. , Presented, 2018.
  • "Energy Harvesting for the Internet of Things" Invited Talk at COMS 2014. , Presented, 2014.

Research Groups

  • Issak Allaire-MacDonald, . Mechanical Engineering. 2020 - present.
  • Julia Dominesey, . Mechanical Engineering. 2019 - present. Awards/Scholarships/Stipends: UROP and REU.
  • Curtis Casados, . Mechanical Engineering. 2019 - 2020. Awards/Scholarships/Stipends: REU.
  • Michael Peterson, . Electrical Engineering. 2017 - 2018. Awards/Scholarships/Stipends: UROP.
  • Hamid Basaeri, . Mechanical Engineering (PhD). 2015 - 2019.
  • William Weatherholtz, . Mechanical Engineering (MS). 2015 - 2017.
  • Shane Williams, . Mechanical Engineering (BS). 2015 - 2018. Awards/Scholarships/Stipends: UROP and REU.
  • Robert Rantz, . Mechanical Engineering (PhD). 2015 - 2019.
  • Hansel Halverson, . Mechanical Engineering. 2014 - 2015.
  • Josh McCleary, . Mechanical Engineering. 2014 - 2014.
  • Christian Soto, . Mechanical Engineering. 2014 - 2014.
  • Jose Ortega, . Mechanical Engineering. 2014 - 2014.
  • Tiancheng Xue, . Mechanical Engineering (PhD). 2013 - 2018.
  • Mark Eilertsen, . Mechanical Engineering. 2013 - 2015.
  • Joseph Brink, . Mechanical Engineering. 2012 - 2012.
  • Giman Lee, . Electrical Engineering. 2012 - 2013.
  • John Heit, . Mechanical Engineering. 2012 - 2014.

Languages

  • Spanish, Functional.

Geographical Regions of Interest

  • Germany
    Have collaborative projects with IMTEK at the University of Freiburg.
  • United Kingdom
    Have collaborative projects with Imperial College London and the Universtiy of Aberdeen.