IMEKO Event Proceedings Search

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Blaz Santic
NEW EVALUATING METHOD FOR TESTING OF SIMPLE GEOMETRY AND WORK PIECES

The paper describes a new approach based on Chebyshev method, which is stabilized by an arbitrary small weighing of least-squares principle in order to permit the reliable and repeatable examination of the best fit geometric elements in a simple and very complex geometry. Field of application of new method is geometry quality control in automotive and machinery building industry, in plastic forming etc. The method can be also used for further investigations of margin and stability conditions of Chebyshev method.

Blaz Santic
COMPUATION METHOD FOR TESTING OF WORK PIECES USING COMPLETE GAUGING

The paper describes a new precision evaluation method for testing of the work pieces under enveloping conditions using complete gauging, as defined by ISO 1101 and ISO 2692. The method permits a reliable examination of the best fit elements in a very complex geometry under consideration of all defined links between the geometric elements and all defined tolerance zones, with the least fault zones.

Zobeida Cisneros, Ivan Apolo, Teresa Vera, Leo Van Biesen, Tesfa Ghebreegziabeber, Ma. del Pilar Cornejo, Francisco Torres
INVENTORY INTO A DIGITAL LIBRARY OF THE COMPLETED STUDIES TO ASSES THE CHARACTERIZATION OF THE GULF OF GUAYAQUIL BASED ON THE PERFORMING INFORMATION UTILIZING ELECTRONIC CHARTING AND DISPLAY SYSTEMS A

The university institution plays an important role as generator and bank of information through research (starting with thesis works), human and technological resources, while keeping up-to-date with the demands of the community on the formation of professionals. It is the commitment of the authors and the whole of the research team to elaborate, with all the means available at the academic institutions they belong to, this Geographic Information System to accomplish the goal of providing the stakeholders in the Gulf of Guayaquil (GG), Ecuador, objective means for decision-making. The methodology applied to build up digital thematic information useful for management of the ecosystem of the Gulf of Guayaquil consists of:
1. Set-up an Electronic Charting and Display System - ECDIS with the database inventory and the digital cartography available;
2. Select out of the databank that information that is competent and constitute with it a geographic database suitable for the identification of regions in the gulf;
3. Work out spatial relationships with the output of that selection to characterize the gulf in terms of spatial and temporal driving factors;
4. Produce presentation maps synthesizing the results of the analysis. Several of the maps realised are discussed, which show the analysis performed on the variables that describe natural and man-driven activities in the GG. For instance, at the base of an Internet-accessible alert system lies information on production and management of shrimp farms in the region, summarised in an index that is used to map the variation between the monthly performance and the historical one. A second example shows rather a lesser abstraction of the information, and shows layers describing the natural set-up regarding the hydro-dynamics of the inner estuary, which would be a second building block toward the integrated vision on how to manage the ecosystem in view of the economic interests, and also the sustainability ones.

Mathias J. Niemann
NEW SIGNAL PROCESSING METHOD OF TRANSIT TIME MEASUREMENT

The cross-correlation function is commonly used to measure the transit time between two similar signals. The maximum value of the cross-correlation function corresponds to the transit time. The other way to measure this is to add the two signals. This method is comparable with the well known interference measurement technique. In the spectrum of the added signals after filtering a cosine function can be determined. The frequency of this function is directly proportional to the transit time.

Vedran Mudronja, Biserka Runje, Srdan Medic
EXAMPLES OF APPLYING MONTE CARLO SIMULATIONS IN THE FIELD OF MEASUREMENT UNCERTAINTIES OF THE STANDARD OF LENGTH

Recently, the Monte Carlo simulations (MCS) have been increasingly applied in the field of estimating the measurement uncertainties. The MCS method is based on random number generation from the probability density functions for each input value and forming of experimental probability density function of the output value. The paper presents calculation examples of the measurement uncertainty in calibration of the standard of length by using the MCS method. The MCS method is implemented for validation of the realised measurement uncertainties by GUM method in calibrating the standard of length.

Matteo Bertocco, Claudio Narduzzi, Alessandro Sona
A UNIFIED CONCEPTUAL FRAMEWORK FOR SPECTRUM ANALYSER MEASUREMENTS

The spectrum analyser is a complex piece of instrumentation, which requires careful operator training to fully exploit its features. Over the years its structure has evolved, both as a result of technological advances and in response to new measurement requirements. A modern spectrum analyser thus offers the user an extensive array of functions and options, arranged in complex menu structures. A side-effect of this situation is that sometimes it may be difficult to retain a common conceptual view of the instrument operation, since a variety of factors and set-up parameters come into play. This paper proposes a theoretical analysis of spectrum analyser operation, with the aim of providing a conceptual framework that can be readily adapted to most practical situations.

Vladimir Kneller
MEASUREMENT, CONTROL AND OTHERS PROCESSES: TO THE PROBLEM OF KNOWLEDGE SYSTEMATIZATION

The paper considers measurement, event detection and control from a generic viewpoint of organizing purposeful processes to reveal their interrelation and specificity important for the construction of a knowledge system relevant to each process. Along with them, it also defines and examines a quantity transformation (conversion) process, which underlies both these and some other processes. From this viewpoint, it illustrates the way of structural level deduction of the methods of quantities transformation and of providing their invariance to influence factors.

Roman Z. Morawski
REALISTS' VS. INSTRUMENTALISTS' UNDERSTANDING OF MEASUREMENT

The main idea of this paper is to analyse the consequences of the philosophical stance – and in particular of the understanding of truth underlying that stance – for the every-day language of measurement science.

Luca Mari
THE CONCEPTS OF ANALOG AND DIGITAL CODING IN TERMS OF MEASUREMENT THEORY

The concepts of analog and digital coding are usually employed with a vague, even if not wrong, meaning, according to the more or less explicit assumption that they are synonymous of continuous and discrete coding respectively. This work is aimed at showing how such concepts can be instead properly defined in terms of Measurement Theory, in the context of the fundamental duality between coding and sensing.

Maarten Korsten, Dan Stefanescu, Paul Regtien
SENSOR SPECIFICATION USING THE ISA AND STEP STANDARDS FOR SENSOR SELECTION

In this paper, a framework is proposed for computer supported sensor selection and design. An important requirement to this is that the specifications of sensors can be matched with requirements. Therefore sensors and requirements must be specified unambiguously. It is foreseen that a software system for this will have to acquire information from suppliers automatically, in order to stay up to date. Also different parts of the software system will have to exchange information. We conclude that a standard neutral information exchange format for the specification of sensors is desired. In this paper an overview of the problem is given. STEP and PLib are introduced as standards for information exchange about products and parts respectively. However, the field of sensor specification has not been developed yet and it is proposed in this paper to do this. As an example, sensor specification within the class of strain gage transducers is worked out. First an overview of modelling options is discussed and then it is demonstrated how sensor specifications might look in the PLib format. It is concluded that the PLib standard is indeed suited for exchanging specification information about sensors.

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