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As part of the collaborative research centre 653 (CRC 653) at the Leibniz University of Hannover, sensors and sensitive materials are being developed which can be integrated into components and register the component condition directly. The part-project "Component status driven maintenance" presented here, develops the methodical procedure for being able to use these sensors in preventive...
Radiation Induced Conductivity (RIC) is the increase in the conductivity of a material due to incident high energy ionizing radiations. The energy of such radiations excites the valence electrons into higher energy levels in the conduction band. Standard theories of RIC predict that the change in the conductivity of a material under radiation is proportional to radiation dose rate. Here, we show that...
A number of loop antennas designed to operate at UHF ISM band 2.4–2.5 GHz have been investigated. Four types of loop antennas were designed and fabricated including the circular wire loop, square loop, circular plate loop, and disk loop. The circular plate loop has been incorporated into the RF sensing and detection peripheral due to its excellent practical performance. It was examined in various...
One way to evaluate the life-time performance of dental restorative materials is to use in vitro dental wear simulators, which generate accelerated artificial dental wear on dental restorative components outside of the human oral environment. However, the work of several researchers has questioned the reliability of these in vitro results as a consequence of significant result variations produced...
The highly sensitive nanowire-based Schottky-gate nanosensors for detecting UV, bio-molecules, and gas sensing were demonstrated. The operating mechanism of the Schottky-gate nanosensors is totally distinct from the conventional Ohmic contacted nanosensors. The Schottky–gated device (SGD) has a few merits in comparison to the conventional Ohmic contacted device (OCD). First, it needs no bio-probe...
Sea and deep sea investigations depend on the availability of efficient and affordable technologies. Especially subsea surveys with underwater vehicles are very cost intensive. In this work we present the concept and the development of a modular underwater vehicle which is easily adaptable to changing tasks specific to deep sea research missions. Different aspects of sub-systems of the vehicle are...
Because of its simple structure, high density and good scalability, resistive random access memory (RRAM) is expected to be a promising candidate to substitute traditional data storage devices, e.g., hard-disk drive (HDD). In a conventional three-dimensional (3D) bipolar RRAM design, an isolation layer is inserted between two adjacent memory layers. The fabrication of the isolation layer introduces...
Pyroelectric generators (PEGs) present a potential alternative to thermoelectric generators (TEGs), to generate electric power from thermal fields. Pyroelectric generators have a predicted upper limit of 50 % of the Carnot's efficiency, which exceeds that of TEGs. However, PEGs require an oscillating thermal field or thermal vibrations. Such vibrations are rare in technical systems, hindering their...
In this paper, planar microwave oscillators are used to measure the dielectric constant of organic liquids for the first time. Dielectric constant of an unknown material is calculated based on the change in oscillation frequency caused by the material-under-test (MUT). A split-ring resonator (SRR) is chosen as the sensing element due its small area and high confinement of electric fields which makes...
The contribution deals with possibilities and practical utilization of animated components in educational process with the scope of technologies used in microelectronic industry. The effort in this area is the part of evolvement of multimedia support in education process at the Department of Technologies in Electronics of Technical University of Košice. With utilization of multimedia components were...
The earlier research shows that the electrical capacitance sensor through the tomography technique is applicable in flow visualization or image reconstruction, named as Electrical Capacitance Tomography (ECT). ECT can be used for imaging industrial multi-component processes involving nonconducting fluids and solids in pipelines. The electrical capacitance sensor is a non-invasive device that uses...
Over the past 10 years there have been rapid advances in wireless technologies and an importance of a radio frequency (RF) communication system is expanding day by day due to its advantages. In the meantime, a huge number of researchers are investigating from the various aspects of a such field. Electromagnetic wave propagation in an indoor environment and penetration trough environment medium is...
Miniature electrochemical sensors can be produced by thick-film technology. The optimal properties of thick-film electrode system, the production technology optimization of thick-film sensors and the adjustment of optimal technological properties are main problems of sensor design. An area of working electrode and an electrode topology design is the important parts of design a optimization of electrode...
In this paper, we evaluate realizations for implementing an RFID reflected electro-material signature (REMS) sensor. REMS sensors allow passive measurement, recording, and reading of environmental data such as temperature in a small, low cost device. This paper presents results from two configurations: a three-section lossless microstrip transmission line and a monopole probe inserted into a lossy...
Reconfigurable conveyors are increasingly being adopted in multiple industrial sectors for their immense flexibility in adapting to new products and product lines. Before modifying the layout of the conveyor system for the new product line, however, engineers and layout planners must be able to answer many questions about the system, such as maximum sustainable rate of flow of goods, prioritization...
Energy Harvesting is the process of extracting small amount of energy from ambient environment. Reduction in size and shape of the electronic components make the power requirements down to the scale of mW. Due to this fact, Energy harvesting techniques and their applications gain much more attraction. Many techniques are being developed to gain energy from various available sources viz. wind, vibration,...
High-Fidelity Model of the sandwich composite structure with real geometry is reported. The model includes two composite facesheets, honeycomb core, piezoelectric actuator/sensors, adhesive layers, and the impactor. The novel feature of the model is that it includes modeling of the impact and wave propagation in the structure before and after the impact. Results of modeling of the wave propagation,...
Inspection challenges continue to increase as more composite components are introduced into DoD aviation, ground and sea platforms. Composite defects and artifacts introduced during production are not always readily detectable. It is difficult to assess the impact on structural integrity of the system; especially with the varying geometries, the variety of composite materials in use today, and differing...
Based on the reversibility of magnetically controlled shape memory alloy (MSMA), a new actuator is proposed with self-checking and self-control function in this paper. The actuator can suppress the periodic vibration by adjusting the magnitude of excitation voltage. Operation principle, characteristics and the sensing signal processing of the MSMA actuator are analyzed, and experimental studies are...
We have developed a new technique that uses Raman spectra obtained from multiple DUV excitation wavelengths for explosive detection. The strong dependence on excitation wavelength of the Raman signal provides a unique signature, improving specificity.
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