A5089125634- Innovative Energy Harvesting Technologies
- Energy Harvesting in Wireless Networks
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Wireless Power Transfer Systems
- Advanced Thermoelectric Materials and Devices
- Gaze Tracking and Assistive Technology
- High voltage insulation and dielectric phenomena
- Tactile and Sensory Interactions
- Robotics and Automated Systems
- Thermal Analysis in Power Transmission
- Wireless Sensor Networks for Data Analysis
- Power System Reliability and Maintenance
- Internet of Things and AI
- Supercapacitor Materials and Fabrication
- Cybersecurity and Information Systems
- Engineering and Technology Innovations
- Industrial Engineering and Technologies
- Electric Power Systems and Control
- Privacy, Security, and Data Protection
- Lightning and Electromagnetic Phenomena
- Diverse Industrial Engineering Technologies
- Electrospun Nanofibers in Biomedical Applications
- Textile materials and evaluations
- Magnetic Field Sensors Techniques
Riga Technical University
2013-2023
Materials Science & Engineering
2019
Riga Stradiņš University
2014
The present study reports the origin of surface charge on polymer upon triboelectrification and is a step forward towards development next generation mechanical energy harvesting systems.
Triboelectric nanogenerators based on ferroelectric materials exhibit boosted performance due to magnified induction by piezoelectric charges.
Rise in use of mobile and wearable electronic devices increase the demand solutions to power these conveniently safely for humans environment. Harvesting human body energy is one perspective this problem. This paper studies performance harvesting waste heat using thermoelectrical generators. Generated form electricity not suitable direct by special converters have be used transform store electrical energy. Study analyzes three commercially available low voltage step-up conjunction with...
Intelligent biomedical clothes combine health problem prevention, comfort, convenience, entertainment and communication with fashion make everyday life easier. Homecare healthcare applications wireless, mobile networks wireless sensors improve the existing monitoring capabilities especially for elderly, children, chronically ill also athletes. Sensor nodes are generally battery-powered devices. Batteries add size, weight inconvenience to portable electronic devices require periodical...
An energy-independent wearable electronic system is being researched, where the energy required for its operation obtained from human body movements and heat flow. The power source consists of an electromagnetic motion harvester (mass up to 70 g, peak reaching 38 mW depending on intensity movement), a thermoelectric 112 3 mW), converters storage capacitor. functional part temperature humidity sensors wireless data transmission module, while energy-aware management main function control...
Energy harvesting offers a promising solution for powering growing variety of low-power electronics; however, harnessing energy from human motion, with its irregular and low-frequency bursts power, presents conversion challenges. As rectification is common part it, this study investigates the influence smoothing capacitor values on rectifier output short, intermittent signals. We propose an analytical model that identifies optimal capacity full-bridge rectifier, considering harvester...
In many smart textile development studies, sensors and electro-conductive yarns have been widely investigated used as essential components, especially in the fields of medicine, sport, work wear, special applications. Wearable provide a means to monitor wearer’s health through physiological measurements natural setting or are detect potential hazards alert users and/or caretakers. The aim research is develop prototype wearable electronics that consists high-performance clothing with an...
The human motion energy harvesting is under investigation. aim of this investigation: to develop electromagnetic harvester that will consist only from flat elements and integrable into the apparel. Main parts developed are flat, spiral-shaped inductors. Voltage pulses in such inductors can be induced during a permanent magnet along it. Due structure, completely integrated clothes it not necessary keep empty place for movement magnet, as usual harvesters. prototype clothing, jacket with...
The paper presents results of Latvian distribution system operator Sadales tikls AS (ST) and Riga Technical University (RTU) joint research on possibilities to increase the permissible loading level operating MV cables in order improve efficiency existing network assets usage supply reliability. Permissible determination from heating point view is affected by many variable factors such as ambient environment, temperature, number configuration etc. To estimate temperature characteristics...
Electromagnetic human motion energy harvesters have shown good results previously. As the direct output of a harvester cannot be used for powering electronic devices, paper focuses on complete setup rectifier, ultra-low voltage converter and capacitor charger. The aim is to evaluate performance off-the-shelf elements modules electromagnetic harvester. Three commercially available converters were tested in controlled environment separately. best configuration obtained 4.9V less than 5 minutes...
The paper presents results of Latvian distribution system operator Sadales tikls AS (ST), Riga Technical University (RTU) and transmission Augstsprieguma (AS) joint research to determine the maximum permissible loading level five ST most used 10 kV 20 cable types development MV control methodology which includes achievable conductor temperature prediction model for n − 1 conditions (broken one network element). At laboratory type samples were protractedly loaded at a special test bed...