90 results found
Kiziroglou ME, Boyle D, Wright SW, et al., 2015, Acoustic energy transmission in cast iron pipelines, The 15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2015), Publisher: Institute of Physics (IoP), Pages: 1-5, ISSN: 1742-6588
In this paper we propose acoustic power transfer as a method for the remote powering of pipeline sensor nodes. A theoretical framework of acoustic power propagation in the ceramic transducers and the metal structures is drawn, based on the Mason equivalent circuit. The effect of mounting on the electrical response of piezoelectric transducers is studied experimentally. Using two identical transducer structures, power transmission of 0.33 mW through a 1 m long, 118 mm diameter cast iron pipe, with 8 mm wall thickness is demonstrated, at 1 V received voltage amplitude. A near-linear relationship between input and output voltage is observed. These results show that it is possible to deliver significant power to sensor nodes through acoustic waves in solid structures. The proposed method may enable the implementation of acoustic - powered wireless sensor nodes for structural and operation monitoring of pipeline infrastructure.
Kiziroglou ME, Yeatman EM, 2015, Protection of Electronics from Environmental Temperature Spikes by Phase Change Materials, Journal of Electronic Materials, Vol: 44, Pages: 4589-4594, ISSN: 0361-5235
Protection of electronics from high-temperature environments is desirable inapplications such as harsh-environment industrial sensor networks for continuousmonitoring and probing. In this paper, the use of phase changematerial (PCM) encapsulation of electronics is proposed as protection fromenvironment-induced, probing-induced or electronic power burst-inducedtemperature spikes. An outline of the encapsulation method is given and aheat flow analysis is performed. A lumped element model is introduced and anumerical simulator is implemented. An encapsulation setup is fabricated andtested, allowing an experimental validation of the proposed method andmodel. The numerical simulation model is then used to study particulartemperature spike scenarios. The results demonstrate that at reasonableencapsulation sizes and for commercially available phase change and insulationmaterials, short-term protection from large temperature spikes can beprovided by the proposed method. As an indicative example, for a typicalsensor node normally operating at a 20C environment, PCM encapsulationmay provide protection for 28 s of exposure to 1000C per PCM gram.
Kiziroglou ME, Elefsiniotis A, Kokorakis N, et al., 2015, Scaling of dynamic thermoelectric harvesting devices in the 1-100 cm(3) range, Conference on Smart Sensors, Actuators, and MEMS VII 1st SPIE Conference on Cyber-Physical Systems, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
Jiang H, Kiziroglou ME, Yates DC, et al., 2015, A NON-HARMONIC MOTION-POWERED PIEZOELECTRIC FM WIRELESS SENSING SYSTEM, 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), Publisher: IEEE, Pages: 710-713
Kiziroglou ME, Wright SW, Toh TT, et al., 2014, Design and Fabrication of Heat Storage Thermoelectric Harvesting Devices, Industrial Electronics, IEEE Transactions on, Vol: 61, Pages: 302-309, ISSN: 0278-0046
Becker T, Elefsiniotis A, Kiziroglou ME, 2014, Thermoelectric Energy Harvesting in Aircraft, Micro Energy Harvesting, Editors: Briand, Roundy, Yeatman, Publisher: Wiley, Pages: 415-433
Jiang H, Kiziroglou ME, D C Yates, et al., 2014, A Motion-Powered Piezoelectric Pulse Generator for Wireless Sensing via FM Transmission, IEEE Internet of Things Journal, Vol: Under Review
Jiang H, Kiziroglou ME, Yates DC, et al., 2014, A Piezoelectric Pulse Generator and FM Transmission Circuit for Self-Powered BSN Nodes, Wearable and Implantable Body Sensor Networks (BSN), 2014 11th International Conference on, Publisher: IEEE, Pages: 1-5
Toh TT, Wright SW, Kiziroglou ME, et al., 2014, Inductive Energy Harvesting for Rotating Sensor Platforms, ISSN: 1742-6596
Toh TT, Wright SW, Kiziroglou ME, et al., 2014, Inductive energy harvesting from variable frequency and amplitude aircraft power lines, ISSN: 1742-6596
Toh TT, Wright SW, Kiziroglou ME, et al., 2014, A dual polarity, cold-starting interface circuit for heat storage energy harvesters, Sensors and Actuators A: Physical, Vol: 211, Pages: 38-44, ISSN: 0924-4247
Kiziroglou ME, Elefsiniotis A, Wright SW, et al., 2013, Performance of phase change materials for heat storage thermoelectric harvesting, Applied Physics Letters, Vol: 103, ISSN: 1077-3118
Heat storage energy harvesting devices have promise as independent power sources for wireless aircraft sensors. These generate energy from the temperature variation in time during flight. Previously reported devices use the phase change of water for heat storage, hence restricting applicability to instances with ground temperature above 0 °C. Here, we examine the use of alternative phase change materials (PCMs). A recently introduced numerical model is extended to include phase change inhomogeneity, and a PCM characterization method is proposed. A prototype device is presented, and two cases with phase changes at approximately −9.5 °C and +9.5 °C are studied.
Elefsiniotis A, Kiziroglou ME, Wright SW, et al., 2013, Performance evaluation of a thermoelectric energy harvesting device using various phase change materials, ISSN: 1742-6596
Toh TT, Wright SW, Kiziroglou ME, et al., 2013, Harvesting energy from aircraft power lines, Proceedings of the 1st International Workshop on Energy Neutral Sensing Systems, Publisher: ACM
Kiziroglou ME, Wright SW, Toh TT, et al., 2012, Heat Storage Power Supply for Wireless Aircraft Sensors, Pages: 472-475
Kiziroglou ME, Yeatman EM, 2012, 17 - Materials and techniques for energy harvesting, Functional Materials for Sustainable Energy Applications, Editors: Kilner, Skinner, Irvine, Edwards, Publisher: Woodhead Publishing, Pages: 541-572, ISBN: 978-0-85709-059-1
Abstract: Energy harvesting, the collection of small amounts of ambient energy to power wireless devices, is a very promising technology for applications where batteries are impractical, such as body sensor networks and inaccessible remote systems. The performance and potential of energy-harvesting devices depend strongly on the performance and specific properties of materials. In this chapter the important properties and potential of materials used in energy-harvesting devices are reviewed. An introduction to the concept of energy harvesting is given with a special discussion on motion energy-harvesting limits. The state of the art of materials for piezoelectric, electrostatic, thermoelectric and electromagnetic harvesting devices is discussed, with emphasis on desired material properties and corresponding available materials. In addition to the materials required in the energy transduction mechanism itself, the performance of mechanical oscillators at small scales is a critical factor in motion energy harvesting. For this reason, material requirements, performance and limitations for the implementation of low-frequency and broadband mechanical oscillators are reviewed in the final section of this chapter.
Ilioudis CV, Kiziroglou ME, 2012, LC Oscillator As An Ultra Simple, Low Power Transmitter For Wireless Sensors
Kiziroglou ME, Samson D, Becker T, et al., 2011, Optimization Of Heat Flow for Phase Change Thermoelectric Harvesters, Seoul, Korea, PowerMEMS, Pages: 454-457
He C, Kiziroglou ME, Yates DC, et al., 2011, A MEMS self-powered sensor and RF transmission platform for WSN nodes, Sensors Journal, IEEE, Vol: 11, Pages: 3437-3445, ISSN: 1530-437X
Kiziroglou ME, He C, Yeatman EM, 2010, Flexible substrate electrostatic energy harvester, Electronics Letters, Vol: 46, Pages: 166-167, ISSN: 1350-911X
Kiziroglou ME, Mukherjee AG, Vatti S, et al., 2010, Self-assembly of three-dimensional Au inductors on silicon, IET microwaves, antennas & propagation, Vol: 4, Pages: 1698-1703, ISSN: 1751-8733
He C, Kiziroglou ME, Yates DC, et al., 2010, MEMS energy harvester for wireless biosensors, Pages: 172-175
Kiziroglou ME, Yates DC, He C, et al., 2010, Body motion powered wireless transmission platform, Proc.. Power MEMS’10, Pages: 187-190
He C, Arora A, Kiziroglou ME, et al., 2009, MEMS energy harvesting powered wireless biometric sensor, Pages: 207-212
One of the main challenges in developing wireless biometric sensors is the requirement for integration of various systems into a very compact device. Such systems include sensing units, conditioning electronics, transmitters and power supplies. In this work, a novel system integration architecture is presented. A unique feature of this new architecture is that the sub-systems are selected and designed for direct output-to-input connection. An array of active pH sensors is used to transform a pH level to an electrical potential in the range of 0-2 Volts. This signal is amplified by an electrostatic energy harvester suitable for human motion operation. The amplified signal drives a custom LC transmitter specially designed to suit the harvester output. A system of notable simplicity is achieved and may serve as a demonstrator for other wireless sensors. © 2009 IEEE.
Li XV, Husain MK, Kiziroglou M, et al., 2009, Inhomogeneous Ni/Ge Schottky barriers due to variation in Fermi-level pinning, Microelectronic Engineering, Vol: 86, Pages: 1599-1602, ISSN: 0167-9317
Mukherjee AG, Vatti S, Kiziroglou ME, et al., 2009, Integration of self-assembled inductors with CMOS LC oscillators, Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European, Publisher: IEEE, Pages: 523-526
Kiziroglou ME, He C, Yeatman EM, 2009, Rolling Rod Electrostatic Microgenerator, IEEE Transactions on Industrial Electronics, Vol: 56, Pages: 1101-1108, ISSN: 0278-0046
The difficulty of maximizing the proof mass, and lack of broadband operation, are key issues for miniaturized energy-harvesting devices. Here, a novel electrostatic energy harvester is presented, employing an external free-rolling proof mass to address these issues. A description of the operating principle is given, and the kinetic dynamics of the cylinder are analyzed. The electrostatics of the system are simulated, identifying the device performance for different dielectric dimensions and surface specifications. The fabrication of a prototype device is presented, and physical characterization results demonstrate a successful fabrication technique for dielectric sizes down to 100 nm. Capacitance measurements reveal a capacitance ratio of 4 and are in agreement with simulation results. A voltage gain of 2.4 is demonstrated. The device is suitable for energy harvesting from low-frequency high-amplitude ambient motion sources such as the human body.
He C, Arora A, Kiziroglou ME, et al., 2009, MEMS Energy Harvesting Powered Wireless Biometric Sensor, Wearable and Implantable Body Sensor Networks, 2009. BSN 2009. Sixth International Workshop on, Pages: 207-212
One of the main challenges in developing wireless biometric sensors is the requirement for integration of various systems into a very compact device. Such systems include sensing units, conditioning electronics, transmitters and power supplies. In this work, a novel system integration architecture is presented. A unique feature of this new architecture is that the sub-systems are selected and designed for direct output-to-input connection. An array of active pH sensors is used to transform a pH level to an electrical potential in the range of 0 - 2 Volts. This signal is amplified by an electrostatic energy harvester suitable for human motion operation. The amplified signal drives a custom LC transmitter specially designed to suit the harvester output. A system of notable simplicity is achieved and may serve as a demonstrator for other wireless sensors.
Mukherjee AG, Vatti S, Kiziroglou ME, et al., 2009, Integration of self-assembled inductors with CMOS LC oscillators, Microwave Conference, 2009. EuMC 2009. European, Pages: 1876-1879
The quality factor (Q) of integrated inductors is of great importance to radio frequency applications. Monolithic integration of out-of-plane Au inductors with Complementary Metal-Oxide-Semiconductor (CMOS) LC oscillators is reported in this paper. The recently developed self-assembly process involves in-plane fabrication of Au inductors and subsequent rotation of the structure by surface tension forces of a melting Sn hinge. The CMOS compatibility of this process is demonstrated through the integration of an LC oscillator with the self-assembled inductor using post-CMOS processing. At a 1.48 GHz oscillation frequency, a phase noise of -95 dBc/Hz is reported at a 100 kHz frequency offset. Obtained results show this technique to be promising for the integration of high Q inductors with commercial RF systems.
Mukherjee AG, Kiziroglou ME, Holmes AS, et al., 2008, MEMS post-processing of MPW dies using BSOI carrier wafers, Conference on Micromachining and Microfabrication Process Technology XIII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
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