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The paper presents a designed, implemented and tested application intended to evaluate the level of attention to people who perform activities that require a high level of concentration, using a measurement system in one point of the electroencephalographic signal. The paper presents the hardware and software structure that highlights the advantages of the system.
This paper presents a method of monitoring the stress level of a company's employees, pupils or students who are working on their computer. The functioning of sweat glands in certain areas of the body, such as palms, arms and soles, is activated by psychological stimuli, independent of external temperature or physical effort, a phenomenon that translates to the skin level by altering the electrical...
In this paper two acquisition and monitoring systems for electrodermal response are presented. One system is done with an Arduino data acquisition board that has a WiFi module integrated. The second system is based on a data acquisition board that has a dedicated platform for acquiring biological signals integrated, produced by Libelium. The data acquired are transmitted to the computer through a...
World of industry in this moment doesn't offer possibility to have unlimited time for maintenance. When a breakage it is happen, in a limited time you need to solve the problems. In this article we are proposing a solution for a good management of accidental maintenance. Our solution is a little module that can be interchanged in a system when the breakage of this appear. The module that we propose...
The authors have been developed a number of solutions in heliothermic actuators and motors area made on the basis of solid heating medium. The paper presents the authors contributions on the development of solar actuators with bimetallic band. In the end of the paper are presented the main conclusions about testing and practical implementation.
In this paper the authors present the contributions on the development of solar actuators with bimetallic band. The investigations have led to the realization of a heliothermic actuator provided with a system for maintaining respectively evacuation of hot air from its interior. In the end of the paper are presented the main conclusions regarding the practical implementation and testing of the achieved...
The paper presents the study regarding the implementation of actuators that use special smart material springs. The system relates to an actuator formed by of two elements, one fixed and one mobile that are attached to a force measuring device. Between the two elements are placed a number of springs made from a material with special properties, and those springs heated at different temperatures will...
World became a place where the human is not the principal generator of working force. In nowadays engineers created almost all industries fully automated, where the people are only supervising the production. All this industry that is highly automated had become dependent for the spare parts and maintenance. When it's appearing a problem in a highly automated industry it may be possible a halt in...
In this paper is presented the authors concern regarding the development of solutions in the field of heliothermic actuators achieved based on the solid heat medium. One of the research directions has led to an actuator with bimetallic band in the form of flat spiral spring and heat conductive fins. In the end of the paper are presented main conclusions regarding the tests made on the actuator with...
In this paper we present a solution to save electrical components and energy in a system that produces compressed air. This system has a couple of compressors and when are connected to one tank these compressors work unsynchronized. Our solution reduces the number of start-ups for each one and minimalizes the cost of maintenance.
CEUS figure are actually a series of images that captures the ferrofluid spectrum movement under the action of a rotating magnetic field. Depending on the shape of the field pattern, the ferrofluid located inside a cylindrical dielectric recipient, gets a rotating movement that is highlighted by a bronze powder cluttered on the surface of it. This paper presents the results obtained from the modeling...
The paper aims to achieve an optimized system for cooling the sliding contact used at the commutation of the transformers with continuously adjustable voltage using an Arduino microcontroller board and to analyze the efficiency of various cooling systems for an economical and secure exploitation of these equipment.
This paper presents the software application, performed in LabView, concerning the utilization of clock hour number transformation diagram for the three-phase transformers. The transformation diagram through its configuration and composition expresses all the possibilities of amending clock hour number, by changing connections to the transformer terminals. The end of the paper presents the conclusions...
In the carbon brush which is used at the transformers with continuously adjustable voltage under load occurs an irregular distribution of current and therefore the ohmic resistance of conductor route through the sliding contact cannot be calculated with the classical formula, and in this case, in the closed loop consisting of the turn which is shorted by carbon brush it is produced an short-circuit...
The mathematical model of a three-phase transformer clock hour figure can be expressed in the simplest form by a 3×3 square matrix called matrix code and authors, wishing to emphasize its origin, propose the association with the term: CEUS matrix. The initial mathematical model can be expressed by a code equation or, in graphical form, through a code graph. Interrelated with the mathematical model...
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