A5043840013- Advanced Sensor and Energy Harvesting Materials
- Innovative Energy Harvesting Technologies
- Energy Harvesting in Wireless Networks
- Electrical and Thermal Properties of Materials
- Advanced MEMS and NEMS Technologies
- Sensor Technology and Measurement Systems
- Energy Efficient Wireless Sensor Networks
- Acoustic Wave Resonator Technologies
- Wireless Power Transfer Systems
- Advanced Sensor Technologies Research
- Muscle activation and electromyography studies
- Ferroelectric and Piezoelectric Materials
- Analytical Chemistry and Sensors
- Advanced Thermoelectric Materials and Devices
- Indoor and Outdoor Localization Technologies
- Advanced Fiber Optic Sensors
- Gas Sensing Nanomaterials and Sensors
- Mechanical and Optical Resonators
- Microfluidic and Capillary Electrophoresis Applications
- Microfluidic and Bio-sensing Technologies
- Target Tracking and Data Fusion in Sensor Networks
- Transport Systems and Technology
- Underwater Vehicles and Communication Systems
- Thermal properties of materials
- Advanced Chemical Sensor Technologies
University of Southampton
2016-2025
Cardiff University
2009-2018
University of Twente
2018
University of Colorado Boulder
2010
Cranfield University
2002-2003
ViaCyte (United States)
2000
University of Florida
1999
EA Technology
1996
Pirelli (Italy)
1991
This paper reviews the state-of-the art in vibration energy harvesting for wireless, self-powered microsystems. Vibration-powered generators are typically, although not exclusively, inertial spring and mass systems. The characteristic equations inertial-based presented, along with specific damping that relate to three main transduction mechanisms employed extract from system. These are: piezoelectric, electromagnetic electrostatic. Piezoelectric employ active materials generate a charge when...
As MEMS and Smart Material technologies advance, embedded remote applications are becoming more widespread. Powering these systems can be a significant engineering problem, as traditional solutions such batteries not always appropriate. An inertial generator is developed that uses thick-film piezoelectric to produce electrical power from vibrations in the environment of device. The device validates concept, produces an output 3 µW. Predictions show orders magnitude increase possible.
A review of thick-film sensors is presented. The evolution the technology to a successful enabling mechanism for solid-state described. Many examples applications in major signal domains (mechanical, radiant, thermal, magnetic and chemical) are cited. important characteristics relating hybrid circuits, support structures primary sensing elements illustrated. future discussed light rapid development new materials that have emerged over recent years.
Wearable devices are ideal for personalized electronic applications in several domains such as healthcare, entertainment, sports and military. Although wearable technology is a growing market, current predominantly battery powered accessory devices, whose form factors also preclude them from utilizing the large area of human body spatiotemporal sensing or energy harvesting movements. E-textiles provide an opportunity to expand on wearables enable via larger surface offered by garments, but...
Abstract A key task of emergency departments is to promptly identify patients who require hospital admission. Early identification ensures patient safety and aids organisational planning. Supervised machine learning algorithms can use data describing historical episodes make ahead-of-time predictions clinical outcomes. Despite this, settings are dynamic environments the underlying distributions characterising change with time (data drift), so relationship between episode characteristics...
The use of alternative electrical energy sources to batteries is particular significance remote sensor systems. A vibration-powered micro-generator, based on a screen printed piezoelectric material, proposed for this purpose. Theoretical and experimental results show that 2 µW can be generated vibration frequency only 80 Hz. device not optimized significant improvements are envisaged in the future.
The ability to mimic the tactile feedback exhibited by human hand in an artificial limb is considered advantageous automatic control of new multifunctional prosthetic hands. role a slip sensor this detect object and thus provide information controller, which automatically adjusts grip force applied held prevent it from falling. This system reduces cognitive load experienced user not having visually assess stability object, as well giving them confidence apply unnecessarily excessive forces....
A new design for a silicon-based micropump is described. Passive cantilever valves are produced by boron etch stop and fusion bonding. Tests of these show good performance, as no flow could be detected in the reverse direction. Initial experiments on thick-film screen printed piezoelectric membrane actuator were undertaken. study suitable inks electrodes different insulation layers silicon yielded dioxide cermet gold ink most satisfactory combination. Deflection measurements mm PZT (lead...
This paper details an experimental investigation of the clamping effect associated with thick-film piezoelectric elements printed on a substrate. The reduces measured coefficient, d33, film. reduction is due to influence d31 component in film when deformation structure occurs, by either direct or indirect effect. Theoretical analysis shows d33 62%, i.e. standard bulk lead zirconate titanate (PZT)-5H sample manufacturer specified 593pC/N would fall 227.8pC/N. To confirm this effect,...
Thick-film printed lead zirconate titanate (PZT) structures can be combined with micromachined silicon and offer relatively large actuation forces compared to alternative techniques. This paper describes the initial investigation into compatibility issues of micromachining wafers PZT layers on surface. It assesses effect many standard photolithography upon layer. In particular adhesion layer substrate its internal structure have been studied after exposure each process. Standard using...
This paper describes a new multi-degree-of-freedom (MDOF) ultrasonic motor that comprises few parts and is based on low-cost thick-film technology. Conventional motors using bulk lead zirconate titanate (PZT) or thin-film PZT layers are relatively expensive at the present time. Thick-film printed technology provides opportunity to reduce costs of motors. To demonstrate feasibility this approach, an was fabricated from alumina actuators. The electrode were thin plate, tiny cylinder mounted...