Showing papers in "Measurement in 2003"

TL;DR: The concept of measurement is defined as a process of empirical, objective assignment of symbols to attributes of objects and events of the real world, in such a way as to describe them as discussed by the authors.

TL;DR: In this article, the general epistemological problem of measurement with respect to generic evaluation has been investigated, and three distinct standpoints are recognized, corresponding to a metaphysical, an anti-metaphysical, and relativistic period.

TL;DR: The t -norm based arithmetics to describe the propagation of both systematic and statistical inexactness is proposed, and results of single measurements are fuzzy intervals, propagation of inexactsness are described by fuzzy arithmetic based on t-norm.

TL;DR: In this article, a 3D model of the inaccuracy of a touch trigger probe used to collect coordinates of a measured object by coordinate measuring machine (CMM) is proposed.

TL;DR: In this paper, a thin-film germanium thermistor based flow sensor based on a silicon nitride diaphragm carried by a silicon frame has been developed with high flow sensitivities and short response times.

TL;DR: In this paper, the development of a data acquisition system for remote monitoring and control of RES plants is presented, based on the Client/Server architecture and it does not require the physical connection of the monitored systems to the data collection server.

TL;DR: In this paper, the 3D theoretical model of a touch trigger probe pretravel is experimentally verified and a new method applying a low force high resolution displacement transducer is proposed to measure a probe pre-travel in XYZ space.

TL;DR: In this article, the authors used a 3 mm threaded rod as the bluff body in a pipe of 100 mm diameter and obtained the best results with a blimp body with a diameter of 3 mm.

TL;DR: In this paper, a sensing element of column type was devised as a multi-component force/moment sensor by attaching strain gages, and the ratio of length over diameter (L/D) for the sensing element was designed analytically and verified by finite element analysis.

TL;DR: In this paper, the development of a near-infrared (NIR) spectrometer system for on-line monitoring of fat in milk processing is outlined, which uses micro-systems optical components fabricated using the LIGA technique.

TL;DR: In this article, a fast fiber-optic two-colour pyrometer with high local resolution has been developed which enables measurements of surfaces with unknown emissivities, where the pyrometers enable different measurement positions to show the influences of cutting speed and tool wear on the temperatures.

TL;DR: A model is proposed which identifies two main sub-processes, named observation and restitution, which accounts for transformations in the measuring system giving rise to the observable output and the latter includes data processing which yields the final measurement result.

TL;DR: Different optical methods, applied for 3D measuring at microscopic and macroscopic levels of sheet metal parts, based on the projected fringes method (PFM), electronic speckle interferometry (ESPI), the structured-lighting reflection technique (SLRT), white-light interference (WLI) and also SEM-, AFM- and laser scanning methods (LSM) are discussed in this paper.

TL;DR: The state of understanding and trends of these relationships are reviewed from a measurement practitioner’s viewpoint.

TL;DR: In this paper, an Adaptive Line Enhancer (ALE) based on a Frequency Domain Least-Mean-Square (FDLMS) adaptive algorithm is used to predict the response of a wheel speed sensor embedded in a car undergoing performance tests.

TL;DR: In this paper, a theoretical model for internal strain measurement of concrete in uniaxial compression by embedded fiber optic sensor is presented. And the comparison indicates a good agreement between the experimental and theoretical results.

TL;DR: In this paper, an unsteady flow generator for gases using the isothermal chamber was proposed, which can be useful for measuring the dynamic characteristics of gaseous flow meters.

TL;DR: In this paper, a simple method for directly measuring bearing wear by means of an eddy-current displacement sensor was developed, which consists of a sensor head unit including a displacement sensor and aluminum functioning foil as a target metal, a data processing system including an amplifier, an A/D converter of 14 bits, a personal computer, and a display.

TL;DR: In this paper, the validity limits of Norde, Lien-So-Nicolet, Werner, and others are evaluated by a numerical simulation, and it is confirmed that these methods are correct if the base resistance is constant.

TL;DR: In this paper, the authors describe different solutions for behavioural identification of non-linear dynamic systems, all based on a modified Volterra series, which is characterized by a reduced number of operators with respect to the classical VOLTERRA approach, allowing a reliable extraction of the model parameters by means of conventional instrumentation, without the need for the generation of complicated input probing signals or additional approximations.

TL;DR: The four-point probe method, elaborated by van der Pauw, can be applied also in absolute measurements of electrical conductivity of electrolyte solutions as discussed by the authors, and three designs of such cells have been constructed and tested by the author.

TL;DR: In this paper, the authors present a method which is able to describe the reliability of the parametric error as the calibration result of a CMM, and confirm the method through the simulation on the calibration performed only by linear displacement measurements.

TL;DR: In this paper, the fundamental undamped natural frequency and damping ratio for the discharge reed valve in a rolling piston rotary compressor were measured using a non-contacting measurement technique; thus, an optical displacement follower was chosen as the primary transducer.

TL;DR: In this paper, a specific test bench with temperature dependence has been developed to monitor P ( I ), I ( V ) and L ( λ ) of 15 DCBH InGaAsP/InP 1310-nm Fabry-Perot laser modules and has allowed to extract three main failure signatures after 300 thermal cycles.

TL;DR: In this article, the calibration of an isothermal heat conduction calorimeter used to measure the energy produced when mixing two liquids is carried out, and a small amount of parameters that represent adequately the performance of the instrument has been obtained.

TL;DR: In this article, the authors present the architecture of an automated battery test system for conducting valve regulated lead acid battery behavioural research, which employs commercial off-the-shelf (COTS) components.

TL;DR: In this article, the authors evaluate the main factors contributing to the uncertainty in Shore hardness measurements, including the uncertainty of the force transducer used for the calibration process, and its long term instability (drift), temperature variation effect on force transducers response, Shore hardness resolution, durometer inclination error, permissible calibration error, the repeatability effect, indenter form error and other geometric parameters.

TL;DR: In this article, a modified operational amplifier-based Schering bridge network is proposed, where the effect of stray capacitance may be assumed to be negligible and continuous measurement is possible.

TL;DR: The IMGC-CNR constant pressure and variable volume gas flowmeter is described in this paper together with its automatic electronic control and data acquisition system, which is used to produce low pure-gas throughputs in the 10−3 −10−8 Pa m3 s−1 range, at the reference temperature of 294.15 K.