Showing papers in "Measurement in 1988"

TL;DR: The relations with system identification (ie, model building + parameter estimation) are explored and the actual and potential contributions of identification, the availability of appropriate software, and the desirabilities with respect to further contributions to intelligent measurements are discussed.

TL;DR: A computer-aided engineering software package, named Specriter, is being developed to automate the specification compilation process, and the rationale behind the decision to transfer to a knowledge-based approach is outlined.

TL;DR: The paper contains a short description of the identification of the model for error correction, the measurements and experimental results without and with software correction for CMM type SIP 560 M.

TL;DR: The TS-50.1/SiO2 thermopile radiation sensor as mentioned in this paper uses a series-connected array of thermocouples whose sensing junctions are supported on a thin Si3N4/Si2 membrane formed by anisotropic etching.

TL;DR: The place of measurement theory in metrology has been shown and theoretical and methodological problems connected with the model of the measured object, themodel of the measurement process and measurement errors have been presented in detail.

TL;DR: In this article, two possible error estimation methods for measurement in an AC circuit with thyristor control, and for measurement on pulse-controlled induction motors are described. But the estimation of errors by the sampling methods of measurement is complicated on account of the wide and often difficult to define frequency voltage and current spectrum.

TL;DR: In this article, a measurement technique which makes it possible to scan varying interference patterns by using the incremental procedure (forward-backward counting method) is presented, where the primary interference pattern is scanned point-shaped (with a very small detector area) and in a locally identical way.

TL;DR: Solid density standards (SDS) as discussed by the authors allow measurements of about 1 ppm uncertainty, confirmed by many comparisons with standards of other laboratories of the IMGC project for the redetermination of the Avogadro constant.

TL;DR: In the first part of this paper, information-theory is used with respect to measurement to gain a quality-criterion that includes both static and dynamic errors leading to Shannon's well-known channel-capacity.

TL;DR: In this article, two widely used procedures, the vibration analysis and the parameter estimation method, and their applications to technical diagnosis are described and compared, and a combination of both methods provides better test results than conventional procedures.

TL;DR: In this paper, the influence of force transmission and transducer dimensions on the accuracy of the force measurement is studied experimentally by testing several force transducers designed and built by VTT.

TL;DR: In this article, a new technique is proposed to measure mechanical torque of rotating machinery via computer processing, which is pursued performing an FFT-realisation of a differentiating FIR-filter by which the sampled speed step-like waveform, produced during a start-up transient of the motor, is processed.

TL;DR: In this article, international and national intercomparisons of force standard machines are discussed, covering means and procedures, results, evaluation of a force standard machine, and how to improve the accuracy of such machines.

TL;DR: In this article, a digital method for pointwise determination of the interference phase in holographic interference patterns is presented based on the 2D Fourrie transform applied to digitized images.

TL;DR: In this article, a method for non-contacting profile assessment and roughness measurements of engineering surfaces is presented, where the well known effect of focusing a light beam on the surface is used, at the same time compensating for the effect on the measuring results of varying material colours by appropriately processing the measuring signal.

TL;DR: A system concept shall show how measurement technique is to include in computer-integrated manufacturing systems (CIM) for basic sensors to measure physical quantities as force, pressure, temperature, length, etc.

TL;DR: In this article, a solid-state camera that records directly and very rapidly preselected fields of the total frame of an image has been developed for applications in on-line video data reduction and the faster pick-up of visual information.

TL;DR: In this paper, a high-density optical disc cutting machine has been developed, and its track-pitch (TP) accuracy was evaluated by diagnosis of dynamics for the cutting machine, and evidence was obtained that the recording density could be doubled, compared with the recording densities for a conventional optical disc.

TL;DR: In this paper, a servo-accelerometer with the torque motor and pendulum has been installed in a vehicle with its pendulum axis parallel to the pitching axis of the vehicle.

TL;DR: In this article, the authors look at the phenomena causing such poor long-term behaviour and suggest practical countermeasures embracing strain gauge design, cable shielding, hermetic sealing, use of mica films, protestine finishes and wiring suggestions.

TL;DR: The paper presents its authors' views on the scope of education and training in measurement and instrumentation and concerns mainly the basic level of teaching engineers.

TL;DR: In this paper, a design of radiation thermometer is described which has been developed to transfer the calibration from fixed-point primary standard black-body sources to industrial black body furnaces.

TL;DR: In this article, the authors considered multi-frequency methods from the point of view of industrial applications and proposed means to overcome the non-linearity and non-resonance character of these methods.

TL;DR: In this article, a non-contacting laser-based displacement and vibration measuring device is presented based on the coherent detection of the Doppler shift introduced into light scattered by an optically rough target object.

TL;DR: In this article, a general trend to employ resistive power splitters to reduce mismatch errors through either levelling loop or ratio measurement is discussed, and the performance of this broadband component (DC-18 GHz) allows inexpensive good measurements generally, yet high accuracy in power standard calibration transfer every time a complete S-parameter characterisation of the devices is possible via an automatic network analyser.

TL;DR: The 1st conference of Technical Committee-15 (TC-15) which was approved by the General Council (GC) of IMEKO, was held in Plzen, Czechoslovakia, from 25 to 28 May, 1987 as discussed by the authors.

TL;DR: In this article, a complete survey about the actual usefulness of the three main types of resistance SGs is given, for the first time with the measuring accuracy that can be achieved with respect to their typical response.

TL;DR: In this article, the authors present an analysis of the metrological feasibilities of an optical method of filament diameter measurement, which is based on statistical approximation of the experimental results.

TL;DR: In this article, the design, fabrication and performance of an integrated two-dimensional position-sensitive photodetector is presented, where the optoelectronic device used as the sensitive element in the circuit is a full-area position sensitive photodiode with high linearity over the full sensitive area.

TL;DR: A novel algorithm that combines the robustness of the Delta-operator model with the computational simplicity of the moment-matching principle has proved to be useful both for simulation of long sequences of samples with high sampling rate and for approximation of the continuous system parameters.