IMEKO Event Proceedings

Page 795 of 822 Results 7941 - 7950 of 8218

Yu. Kalvachev, V. Ganev, L. Macheva, J. Harizanova
User requirements for remote accessed instruments in material science

The technical specification defined from instrumentation owners of suitable for remote access expencive equipment in Material Science domain are presented. The database containing all mentioned above structured information is created and used as analytical tool in this investigation. The user community requirements in several different domains for application of remote access are evaluated and analyzed. This work is one of the main parts of RINGrid project (Remote Instrumentation in Next generation Grids) under the FP-6 program of the EC that provide close collaboration of EU member states and third countries to ensure Europe's strong participation in the research initiatives conducted at the international level.

T. Werner, H. Schmidt, T. Hausotte

Optical procedures for surface metrology enable an improved inspection of product properties based on plane-oriented parameters. Yet, users in industry still meet many difficulties concerning the application of the new procedures. Thus, in the cooperative project OptAssyst an assistance system is developed to support the performance of surface measurement tasks with optical procedures. To define required support by the system, a user needs analysis has been conducted and typical problems of practical application have been identified.

Bruno Andò, Salvatore Baglio, Cristian Orazio Lombardo, Vincenzo Marletta
User Tracking for AAL: an inertial approach

This paper deals with a novel multi-sensor approach for the implementation of a tracking system exploiting features of smartphones. Actually, the widespread use of smartphones and performances provided by the variety of sensors embedded in these devices encourage their use in mobility oriented applications, such as the exploitation of educational/job environments by weak people. The proposed methodology exploits information provided by the multisensory features embedded in a standard smartphone and advanced paradigms to improve the efficiency of the system in performing user tracking tasks.

Tamás Virosztek, István Kollár
User-friendly software tool for advanced ADC testing

This paper describes a freely available, open source, user-friendly data evaluation program developed for ADC testing with a sine wave. This tool performs multiple kinds of mathematical methods (nonlinear least squares and maximum likelihood) to extract the information from the recorded data. It has been created in the form of a Matlab toolbox for users who have some knowledge in ADC testing, and would like to perform the mathematical computations in an efficient way – especially those that require complex numerical methods Error! Reference source not found.. As it is equipped with a graphical user interface, its usage does not require any programming knowledge, nevertheless one can even get familiar with the framework of the software, as the program files contain the source code that runs using the Matlab interpreter. A further important goal of this software is to create the possibility of publishing reproducible ADC test evaluation results. Statements of related papers can be verified easily: if the raw data are shared, the computations can be repeatedly executed using this software tool.

Karel Sokanský, Petr Dušek

Surge wave diagnostics is based on the principle of discharging two identical capacitors (highfrequency surge) into two loads (windings), and subsequent displaying resonant damped processes on loads by means of the two-channel oscilloscope. To increase the ability to identify failures, this signal must be, however, digitised and analysed by means of a mathematical tool. Generally, it has been stated that through this method, one of ten turn-to-turn short circuits can be identified without digitising the signal; after signal digitising, the identification of failures being improved approximately tenfold.

Mingjian Zhao, Rick Walker

A mini TPW system was introduced as an excellent way to measure the errors in the calibration system of a secondary level temperature laboratory. In this paper, the structure and operation of this system is briefly introduced. Also, its performance is discussed. The mini TPW system was directly compared to a traditional TPW cell. The difference between the mini TPW system and the traditional TPW cell was found to be less than 0.3 mK using an SPRT. The expanded (k = 2) uncertainty of the mini TPW system is better than 0.5 mK. Several thermometers with different structures were tested in the system. Errors seen with the different thermometers between the mini TPW system and the traditional TPW system are reported.

Artur Lopes Ribeiro, F. Corrêa Alegria, Octavian Postolache, Helena Geirinhas Ramos, M. Simões, J. Pimentel, P. Maurício, J. Calvário, A. Carvalho, T. Rocha

The use of Eddy currents is a well-known non-destructive technique used in the characterization of cracks in conductive non-magnetic materials. In this paper some experimental and finite element modelling tests with a new probe installed in a mouse pointer device connected to a PC are reported. This probe combines good sensitivity performances at low frequencies by using a giant magnetoresistor (GMR) magnetic sensor with an hand-held device capable of transferring easily its position to the PC.

Paweł Mazurek, Jakub Wagner, Andrzej Miękina, Roman Z. Morawski, Tomasz Ciamulski
Using accelerometers for evaluation of measurement uncertainty in impulse-radar system for monitoring of elderly and disabled persons

The importance of research on new technologies that could be employed in care services for elderly and disabled persons is highlighted. Advantages of radar sensors, when applied for noninvasive monitoring of such persons in their home environment, are indicated. Methods for estimation of the instantaneous velocity and the mean walking velocity (including automatic detection of time intervals when the person is in motion), on the basis of the measurement data from radar sensors and accelerometers, are described. A novel methodology for evaluation of the estimation uncertainty of the person’s average walking velocity, in an impulseradar-based system for monitoring of movements, is presented. The results of a series of real-world experiments, with a person moving at different predefined velocities, are shown. They are indicating that the accuracy of radar-data-based detection of the person’s motion and estimation of person’s walking velocity may be sufficient for some healthcare applications.

Christian Schuss, Tore Leikanger, Bernd Eichberger, Timo Rahkonen
Using Ambient Light Sensors in Smartphones for Evaluating Indoor Lighting Conditions

This paper discusses opportunities for collecting data on lighting conditions in indoor environments with the help of ambient light sensors in smartphones. Environmental data is needed to allocate the most beneficial location for solar energy harvesters on the one hand and provide energy predictions for their users on the other. Here, we focus on the illumination of surfaces and the use of ambient light sensors to measure the amount of light intensity. A comparison of sensors in different smartphones such as entry-level devices, mid-range and flagship phones is presented and the obtained results are verified against a luxmeter and commercial available ambient light sensors. Furthermore, the impact of the measured light intensity on energy predictions is discussed.

Page 795 of 822 Results 7941 - 7950 of 8218