This work describes the methodology and the basic procedures developed by the patent entitled Method and Device for Measuring Characteristic Curves in Photovoltaic Systems . The invention relates to a measuring device that can capture the current-voltage (I-V) and power-voltage (P-V) characteristic curves of solar cells, photovoltaic (PV) modules or arrays. The patented system employs a novel circuit solution based on DC-DC converters that shows several advantages with regard to classical methods: simple structure, scalability, fast response and low cost. The patented system allows the real time capture and displaying of the I-V and P-V curves of a PV panel or array. Moreover, the patented system allows the real time capture and displaying of pieces of curves which are not connected to each other. An experimental prototype based on four SEPIC (Single-Ended Primary Inductance Converter) converters in parallel connection operating in interleaved mode has been implemented to validate the patented system.
Psychophysics in conjunction with Electrical Engineering and Computer Science has been successful to show the existence of stochastic non linear phenomena and the possibility to induce enhanced sensory ranges in our nervous system. This new fundamental description led to new devices and techniques capable of influencing neurodynamics. In this paper, we describe some significant advances in this field. We begin by referring the first attempt to produce practical devices involving perception improvements, and we discuss several aspects of our own patent, which is a system conceived to enhance human perception as a result of promoting complex interaction in human sensory integration. With this objective, we introduce the structure of the system patented, and we summarize some of the tests and research results providing the scientific background. Finally, we discuss some new challenging fields of application for this kind of invention that will stimulate new research and future patents.
This paper summarizes the design and measurements of a quasi-isotropic printed UWB antenna, with the analysis of its performances through defined figures of merit. State of the art and review of some recent patents give us the opportunity to exploit some empirical considerations about the shape and the methodology of conception. A simple structure is simulated by means of CST Microwave Studio to show the possibility of fulfilling, at a defined level, UWB antenna requirements such as matching, fidelity and quasi-isotropy of the radiation pattern with a simple micro-strip design and a standard technology. The design of this antenna is based on considerations about bulbous and bended traveling wave antennas. Results of its characterization in anechoic chamber are quantified in terms of amplitude and phase variation, in order to illustrate the level of dispersion for the different directions. The article presents some promising patents on quasi-isotropic UWB antenna.
This article describes a robot following system, which uses a fuzzy logic unit to generate control sequence. A stereo vision system using low-cost pinhole cameras is proposed for distance and position feedback in the fuzzy logic unit. The proposed robot control system is built on Tamiya Little Trucks. Experimental results are reported in comparison with a previous work using single camera. The results indicate that our proposed approach provides tighter control performances for the robots to follow predefined courses. VDO clips are available at http://www.youtube.com/watch?v= qAL1uYclvGY and http://www.youtube.com/watch?v=yTWgs1NLWVQ. The article presents some promising patents on Stereo Vision System.
Passive filters are extensively used as an effective procedure for harmonic mitigation due to their wide range of frequency response characteristics which can achieve a specific filtering goal, and also due to their straightforwardness and reasonable cost. This article presents an application of FORTRAN Feasible Sequential Quadratic Programming (FFSQP), which it is implemented to tackle a number of conflicting search goals which allow the appropriate calculation of optimal passive filter parameters. The article includes different optimization criteria depending on the designer concerns. In addition, various case studies are presented, including a comparison between the results of different objective functions by means of different numerical examples, considering their source and load nonlinearities. The article presents some promising patents for the assessment of different objectives for harmonic passive filter design.
In this paper, the features of a compact spherical antenna, already efficiently used for ultra wide band applications, are investigated by exploiting the possibility of detecting electromagnetic transients with frequency content up to the very high frequency range. Transient phenomena with the above mentioned frequency content are those encountered, for example, in partial discharge detection. The behaviour of the adopted compact spherical antenna enables to successfully detect the waveform of typical partial discharge transient radiated electromagnetic field, so preserving the information necessary for the subsequent pattern analysis, typically carried out by using classical conducted measures results. The compact antenna is firstly modelled by using two different moments method approaches in frequency domain: surface and thin-wire models are adopted in order to investigate different case studies so obtaining useful information about the behaviour of the antenna both in frequency and in time domain. Some comparisons with measured transient electromagnetic field data obtained with a real spherical antenna probe enable to successfully validate the use of the compact spherical antenna in detecting electromagnetic transients with frequency content up to the very high frequency range. A recent patent has been obtained also by one of the author by using this type of sensor.
In this paper, we present two pipelined square root circuits for Galois field in Multiple-Valued Logic (MVL). We use composite Galois fields in a MVL approach to generate the required square root value in the field. The fact that less literals are used in our approach speeds up the calculation operation. The MVL approach of calculating the square root in a composite Galois field is novel. In this review important patents are also discussed.
The operational amplifier is one of the most significant performance bottlenecks in traditional Analog-to- Digital Converters. CMOS technology down-scaling results in lower voltage swings and transistor intrinsic gain. This trend increases the challenges in designing analog and mixed-signal circuits. This paper reviews a few promising patents on new development of analog-to-digital converters. The challenges in traditional operational amplifier based ADCs are analyzed.