Showing papers in "Measurement in 1991"

TL;DR: A procedure has been developed at the Physikalisch-Technische Bundensanstalt which allows the parametric errors of coordinate measuring machines and machine tools to be measured using two-dimensional or three-dimensional reference objects.

TL;DR: In this article, a systematisation of the methods of signal reconstruction is proposed, based on the mechanism of regularisation as the criterion, which is productive both in the domain of theory and application of measurement signal reconstruction.

TL;DR: In this article, a second prototype of a Coriolis mass flowmeter (DIME-2) is described, whose sensor is a straight rigid pipe, provided with elastic suspension, and connected with the line by means of suitable metal bellows.

TL;DR: In this article, the possibility of a non-contact optical distance/displacement sensor, making use of optical intensity variations caused by optical feedback effects in laser diodes, was investigated.

TL;DR: This paper describes a more ambitious system, Specriter 3, which incorporates integral domain knowledge to provide firstly, a much higher degree of user assistance, and secondly, the ability to check the resulting specification for reasonableness and consistency.

TL;DR: In this article, the experimental characterisation of the DIME-2 is presented and discussed, and the prototype described here belongs to a second type of sensor realised at the University of Naples.

TL;DR: The role of intelligent instrumentation is highlighted, indicating its function in converting data into information which is then interpreted in the clinical context, and its role in the wider role of patient management is discussed.

TL;DR: The basic concept of a machinery environment is introduced and the main features of expert systems are discussed, and the impact of this newly emerging technique on the design of diagnosis systems is analysed.

TL;DR: In this article, the most important effects of operations specific to digital signal processing and their influence on accuracy of digital instrumentation for electrical power systems, are presented, and a reference A/D converter system, suitable for experimental verification purposes, is described.

TL;DR: A precise and rather fast 3-D shape measuring system was developed utilising a new auto-focusing control, which is composed of highly sensitive focus detection using light intersection and a quick response Z-stage table driven by a high-performance servomechanism.

TL;DR: In this article, an interferometer using the technology of integrated optics on silicon with the aid of LETI in Grenoble is presented. But the main problem which had to be solved in the development was the stability of the system, concerning the semiconductor laser and the electronic components.

TL;DR: In this paper, the authors proposed a new method based upon sampling over an integral number of periods at a high oversampling rate, which eliminates the bias caused by higher order harmonics of the measured signal and has optimal statistical properties since it leads to the maximum likelihood estimator.

TL;DR: In this paper, a short review of the behavior of nonlinear loads is presented, including devices with subharmonic or interharmonic frequencies in the current spectrum, and a short discussion of the total admissable voltage distortion is given.

TL;DR: In this paper, a new method for optical thread measurement by means of two or three coordinate measuring instruments with a rigid microscope aligned perpendicular to the measuring plane is described, where measuring points of the flanks are taken in an extra-axial plane above or below of the axial plane respectively.

TL;DR: In this article, the characteristics and recent trends of optical technology are briefly presented first, to describe their developing possibilities and directions, and the main problems and subjects are pointed out, with reference to the leading applied optical measuring systems in obtaining the satisfactory results in their practical use.

TL;DR: The package constitutes a new approach to mass health care with emphasis on prevention, and some new items in the kit are a folding weighing machine, haemoglobinometer which is independent of volumetric measurement, and a microprocessor-based data recording computer.

TL;DR: In this paper, the cost of uncertainty involved in surface roughness measurements is estimated using a combination of some results from literature, and the results from an investigation in Danish industry are summarised and the sources of the common measuring errors are identified.

TL;DR: A critical analysis of the concepts of compatibility and equivalence between intervals of numbers, and a more general definition for compatibilityand equivalence relations between intervals are given.

TL;DR: A NFF type fibre optic displacement sensor is proposed, which now has been adopted to measure surface roughness and is designed to be suitable for in-process measurement, in which a Z8 single-chip microcomputer is matched.

TL;DR: In this article, a three-coordinate measuring machine (SIP Genevoise model 560 M) was subjected to variations of its average temperature up to 10 K and to thermal gradients up to 30 K/m.

TL;DR: In this article, a 12 MN high-speed tensile testing machine was designed and built at MPA Stuttgart for the testing of large scale specimens, which was driven by a propellant charge.

TL;DR: In this article, a monitoring system to control bearings in mine-shaft installations is reported. The system, which is based on vibration measurement, was developed with two channels, one for each of the bearings.

TL;DR: In this article, a non-orthogonal sine function with deterministic and stochastic shares as part of the measuring value sequences is proposed for shape measurements, which avoids a series of disadvantages of the usual evaluation methods connected with the finite length and the finite number of measuring values.

TL;DR: This article describes the structure of the modular transputer system and its application in the monitoring of a drilling process and the efficiency of real-time analysis methods is discussed.

TL;DR: In this article, the authors reviewed some aspects of optical data gathering (i.e., measurement technology), information transmission, storage and retrieval, as well as information processing and displaying.

TL;DR: In this paper, a concept for the measurement of the impedance of an electrical network as a function of the frequency is proposed, which is based on the generation of a current and the measurements of the voltage and the current which are both digitized.

TL;DR: In this paper, the authors present tools and means to do meaningful analysis using a priori knowledge, and to master the large amount of information generated, using multivariate signal analysis, which can be used to study the behavior of complicated technical systems in amplitude, time and frequency domains.

TL;DR: The criterion is formulated for the minimal period derivation for repetitive automatic digital correction of measurement data at given drifts and specified accuracy for measurement system total gain thermal and temporal drifts.