J. McCullagh
University of Michigan
10 Papers
145 Citations
J. McCullagh is an academic researcher from University of Michigan. The author has contributed to research in topics: Energy harvesting & Voltage. The author has an hindex of 6, co-authored 10 publications.
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Papers
Microsystems for energy harvesting
Khalil Najafi,T. Galchev,Ethem Erkan Aktakka,Rebecca L. Peterson,J. McCullagh +4 more
- 05 Jun 2011
TL;DR: In this article, the authors review the state of the art in miniature microsystems for harvesting energy from external environmental vibration, and describe two specific micro systems developed at the University of Michigan for broadband harvesting of mechanical energy from extremely low frequency (1-5 Hz) random vibrations abundant in civil infrastructure, such as bridges.
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Long-term testing of a vibration harvesting system for the structural health monitoring of bridges
J. McCullagh,T. Galchev,Rebecca L. Peterson,Robert J. M. Gordenker,Yilan Zhang,Jerome P. Lynch,Khalil Najafi +6 more
TL;DR: In this paper, an energy harvesting system that converts the low frequency, non-periodic, and low acceleration vibrations present on bridges is continued and significantly extended in this work, where the mechanics of the harvester were optimized to increase its robustness and lifetime, power electronics were added, and complete system was installed on the New Carquinez suspension bridge in California.
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Harvesting traffic-induced bridge vibrations
T. Galchev,J. McCullagh,Rebecca L. Peterson,Khalil Najafi +3 more
- 05 Jun 2011
TL;DR: In this paper, the performance of a Parametric Frequency Increased Generator (PFIG) is evaluated at different locations along the bridge and the results pave the way for installing a network of wireless structural health monitoring sensors throughout the bridge without regard to specific characteristics of the vibration at each location.
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Energy harvesting of radio frequency and vibration energy to enable wireless sensor monitoring of civil infrastructure
TL;DR: This project develops two power harvesting technologies and a novel parametric frequency-increased generator (PFIG) is developed, and an RF scavenger operating at medium and shortwave frequencies has been designed and tested.
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An Active Diode Full-Wave Charge Pump for Low Acceleration Infrastructure-Based Non-Periodic Vibration Energy Harvesting
TL;DR: An active diode IC-based full-wave charge pump that interfaces to a vibration harvester designed for low acceleration non-periodic bridge vibrations reduces power and allows for a novel passive diode switching technique that also enables a reduction in the turn-on voltage.
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