David Vala
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View article: Thermal Energy Harvesting on the Bodily Surfaces of Arms and Legs through a Wearable Thermo-Electric Generator
Thermal Energy Harvesting on the Bodily Surfaces of Arms and Legs through a Wearable Thermo-Electric Generator Open
This work analyzes the results of measurements on thermal energy harvesting through a wearable Thermo-electric Generator (TEG) placed on the arms and legs. Four large skin areas were chosen as locations for the placement of the TEGs. In or…
View article: Energy harvesting systems using human body motion
Energy harvesting systems using human body motion Open
Energy harvesting device are very attractive as replacement for batteries in system with low energy consumption. In recent years increases research interest. Motion is one the main sources of energy for harvesting. We can capture energy fr…
View article: Human influence on the microclimate of buildings
Human influence on the microclimate of buildings Open
The article discusses the changes in parameters of indoor environment related to the presence of people. Nowadays, the emphasis is on quality window and door seals, resulting in faster expression changes caused by man. These include, in pa…
View article: Proposal discharging station compatible with CHAdeMO automotive standard
Proposal discharging station compatible with CHAdeMO automotive standard Open
The paper is about proposal battery discharging station for automotive using by CHAdeMO standard. The article talks about this and other types of electric batteries sockets for electric cars. The main aim of this paper is talking about mai…
View article: USING PVDF FILMS AS FLEXIBLE PIEZOELECTRIC GENERATORS FOR BIOMECHANICAL ENERGY HARVESTING
USING PVDF FILMS AS FLEXIBLE PIEZOELECTRIC GENERATORS FOR BIOMECHANICAL ENERGY HARVESTING Open
In this paper, a commercial polymeric piezoelectric film, the polyvinylidene fluoride (PVDF) was used to harvest electrical energy during the execution of five locomotion activities (walking, going down and up the stairs, jogging and runni…
View article: Measurements of Generated Energy/Electrical Quantities from Locomotion Activities Using Piezoelectric Wearable Sensors for Body Motion Energy Harvesting
Measurements of Generated Energy/Electrical Quantities from Locomotion Activities Using Piezoelectric Wearable Sensors for Body Motion Energy Harvesting Open
In this paper, two different piezoelectric transducers—a ceramic piezoelectric, lead zirconate titanate (PZT), and a polymeric piezoelectric, polyvinylidene fluoride (PVDF)—were compared in terms of energy that could be harvested during lo…
View article: Mining Shaft Inspection by Laser Photogrammetry
Mining Shaft Inspection by Laser Photogrammetry Open
One of the most important tasks in the area of mining safety is the inspection of vertical mining shaft. Geological processes in the rock mass rise problems with all used mining components over a long-term period. There is a possibility of…
View article: Advanced AMR sensor using spread spectrum technology
Advanced AMR sensor using spread spectrum technology Open
This paper describes invention of magnetometer with protection against detection by electronic countermeasure (ECM) registered by Czech patent office as patent No. 305322 (Vala (2015)). Magnetic sensors are often used as part of dual use o…
View article: Using Electromyography for Improving of Training of Sport Shooting
Using Electromyography for Improving of Training of Sport Shooting Open
This article describes possibilities of using electromyography (EMG) as an objective method for identification of wrong muscles work during aimed shooting focused on disciplines of sport shooting. On the beginning, there is a preview to an…
View article: Energy-independent concept of a house using an electric vehicle traction
Energy-independent concept of a house using an electric vehicle traction Open
Owing to the development of renewable and alternative energy sources, especially photovoltaic and photo thermal systems has their applications in family homes. The problem with these types of resources is efficient accumulation of electric…
View article: Application and Technology of Thermal Imagine Camera in Medicine
Application and Technology of Thermal Imagine Camera in Medicine Open
This review is about modern infrared imaging technology and application in medicine. The method is based on naturally emitted infrared radiation from the skin surface. This method is used as a method of research for early pre-clinical diag…
View article: Testing of the traction batteries in electric vehicles and their further use
Testing of the traction batteries in electric vehicles and their further use Open
In view to an expanding number of electric vehicles on the roads is also increasing demand for high quality batteries. These batteries suitable for the automotive industry (Lithium Iron Phosphate) offer great potential. In this article I w…
View article: Method and Device for Long-Term Cycling Tests of Reversible Fuel Cells
Method and Device for Long-Term Cycling Tests of Reversible Fuel Cells Open
The problematic of fuel cells using is still a little bit complicated especially for real operation. For these purposes there was established Laboratory of fuel cells at VSB Technical university of Ostrava. Among testing of fuel cells perf…
View article: The Use an Electric Vehicle as a Power Source
The Use an Electric Vehicle as a Power Source Open
Electric cars are becoming a serious competition for the common artificial fuel driven cars in small city agglomerates and short distances. With the new developments on the field of state-of-art accumulators, electric cars are becoming muc…