Multi-source power supply system using micro-photovoltaic devices combined with microwave antenna

Sakakibara, T.; Izu, H.; Shibata, T.; Takahashi, Sadao; Tarui, Hisaki; Hirano, Hirohiko; Shibata, Kenichi; Kiyama, Seiichi; Kawahara, Nobuaki

doi:10.1016/s0924-4247(01)00739-7

Cited by 16 publications

(11 citation statements)

References 1 publication

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“…M ICROELECTROMECHANICAL systems (MEMS) are used in a wide range of applications ranging from simple sensors and actuators to biomedical devices [1], projection systems [2], and photovoltaic structures [3]. With the development of increasingly complicated microdevices, many of the emerging MEMS devices include contacting components, e.g., microrelays [4] and microgears [5].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Adhesion on the Static Friction Properties of Sidewall Contact Interfaces of Microelectromechanical Devices

Timpe

Komvopoulos

2006

J. Microelectromech. Syst.

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Static friction between sidewall contact surfaces of polycrystalline silicon micromachines was investigated under different contact pressures, vacuum conditions, relative humidity levels, and temperatures. The static coefficient of friction exhibited a nonlinear dependence on the external contact pressure. A difference between in-contact and pull-out adhesion forces was observed due to the elastic recovery of the deformed asperities at the contact interface. The true static coefficient of friction was determined by considering the effects of the dominant adhesion forces (i.e., van der Waals and capillary forces) on the normal force applied at the sidewall contact interface. The roles of van der Waals and capillary forces in the sidewall friction behavior were analyzed in light of results for the interfacial shear strength and the adhesion force. The major benefits of the present friction micromachine and the developed experimental scheme are discussed in the context of static coefficient of friction and adhesion force results obtained under different environmental and loading conditions.[1753]

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Section: Introductionmentioning

confidence: 99%

The Effect of Adhesion on the Static Friction Properties of Sidewall Contact Interfaces of Microelectromechanical Devices

Timpe

Komvopoulos

2006

J. Microelectromech. Syst.

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“…There are currently several areas being investigated with the aim of solving this problem. These areas include micro batteries (Humble et al, 2001), solar power (Singh et al, 2000;Sakakibara et al, 2002), micro fuel cells (Holladay et al, 2002), and micro heat engine (Whalen et al, 2003). However, this work considers the conversion of vibration energy into electrical power.…”

Section: Ferromagnetic Fibers For Integrated Power Generation Backgroundmentioning

confidence: 99%

Exploiting Functional Fibers in Advanced Composite Materials

Etches

Scholey²,

Williams³

et al. 2007

Journal of Intelligent Material Systems and Structures

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Magnetic fiber reinforced composite material is being developed which utilizes hollow glass fibers filled with active ferromagnetic material. The resulting material maintains structural integrity as is, providing a possible means of electrical power generation from a dynamically loaded structure. The hollow glass fibers are manufactured in-house using a bespoke fiber drawing facility. Hard magnetic powder materials are introduced into the hollow fiber cores to provide an active ferromagnetic function. The first part of this article discusses the ongoing work to manufacture, characterize, and optimize active magnetic fiber reinforced composite materials.Recent advances in smart material actuators have led to the development of piezoceramic 'patches' that utilize the piezoelectric effect of individual fibers encased in a protective environment. Previously, these patches have been either positioned on the surface or embedded within the structure, disrupting the composite lay-up. The second part of the article outlines a study of the feasibility of embedding piezoelectric fibers directly into a composite lay-up, thereby allowing a composite laminate to deform due to internal actuation. Potential improvements to the work have been identified and future work has been proposed to further understand and maximize the performance of integrated piezoelectric fiber composites.

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“…Control of power to various components is easily achieved. Other researchers have proposed other innovative ways to achieve a feasible and reliable power supply (Ko, 1996;Ong, et al, 2001;Sakakibara, et al, 2002).…”

Section: Power Supplymentioning

confidence: 99%

Monitoring the performance of geosynthetic materials within pavement systems using MEMS

2005

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Geosynthetic materials have found useful applications when unbound aggregates have been placed on cohesive soil with very weak subgrade. They have also been successfully used in retarding reflective cracking in both flexible and composite pavements. There are many applications of geosynthetics in pavement engineering yet there is considerable lack of understanding in the behavior of the material. Geosynthetic materials exhibit very peculiar properties in the area of tensile strength and reinforcement. MEMS are miniature sensing or actuating devices that can interact with other environments (provided no adverse reaction occurs) to either obtain information or alter it. With remote query capability, it appears such devices can be embedded in pavement systems as testing and monitoring tools. The aim of this paper is to propose both field and laboratory methods for monitoring geotextile performance using MEMS.

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Multi-source power supply system using micro-photovoltaic devices combined with microwave antenna

Cited by 16 publications

References 1 publication

The Effect of Adhesion on the Static Friction Properties of Sidewall Contact Interfaces of Microelectromechanical Devices

The Effect of Adhesion on the Static Friction Properties of Sidewall Contact Interfaces of Microelectromechanical Devices

Exploiting Functional Fibers in Advanced Composite Materials

Monitoring the performance of geosynthetic materials within pavement systems using MEMS

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