Showing papers in "Measurement in 1985"

TL;DR: The origins of the Vocabulary and some of the problems which arose in the course of the work on its preparation are dealt with.

TL;DR: In this paper, a review of recent developments in silicon reach-through avalanche photodiodes (RAPDs) is presented, which includes devices with: • Broader spectral response ( quantum efficiency > 60% from 400 to 1000 nm ) • Lower bulk dark-current densities • Lower excess-noise-factor devices ( k eff reduced from.02 to.006) • Multi-element APDs.

TL;DR: In this paper, the authors describe the principles and characteristics of symmetrical double-ended tuning fork resonators and their applications as force/pressure transducers, and show that the temperature coefficient and drift can be made quite small, and the output signal can be measured easily and precisely.

TL;DR: In this paper, the functional relationships between measured quantities are considered in order to avoid serious mistakes and improve the accuracy of measurement, and three basic forms of representation - probability theory, fuzzy set theory and well defined equations are analysed.

TL;DR: It is shown how measurands can be identified, how they relate to a necessary model of the system being observed and how to apply the resultant data produced by the measuring system to obtain the required knowledge sought from a planned observation.

TL;DR: In this paper, the authors present an analysis of the state of the general principles of measurement and instrumentation science as a systematically organized framework of concepts and principles, and emphasise the role of design methodology as a core component of Measurement and Instrumentation Science.

TL;DR: In this article, the authors concluded that the characteristic of the frictional moments in a plain bearing can be quantitatively determined by the evaluation of the impulse density as a diagnosis parameter.

TL;DR: In this article, a non-intrusive capacitance transducer is used for the simultaneous on-line measurement of water and undissolved gas in crude oil, where the water concentration of the flow is determined from the mean capacitance of the flowing mixture.

TL;DR: Part 2 now discusses the detailed features of a measurement system, thereby setting the scene for the development of a Measurement Process Algorithm (MPA).

TL;DR: In this paper, the authors describe the reasons and practical needs for the calibration of laser interferometer systems and present a co-axial displacement comparator for simultaneous concurrent comparison of up to 10 complete laser interferer systems.

TL;DR: Fast analogue-to-digital converters used with microcomputers can provide a rapid, accurate and convenient method for the capture and analysis of fluctuating signals associated with turbulent flows.

TL;DR: In this article, the authors describe a fast and accurate method for defining the structure of a noisy measurement system model without a previous parameters evaluation, which is based on the following steps: (i) choosing a stable system structure; (ii) determing the real model order; (iii) estimating the model parameters.

TL;DR: In this paper, the properties of semiconducting infrared detectors and diode lasers relevant to spectroscopic applications are briefly reviewed and a modular diode laser spectrometer, a diode-laser operated multicomponent car exhaust emissions measurement system and a broad band source multichannel near-infrared spectrometers are presented and discussed.

TL;DR: In this article, an automatic system for steady pressure measurement in a small hand-controlled supersonic wind tunnel is described, where the ratio of model surface pressure to tunnel blowing pressure was measured using a Scanivalve controlled by a small digital computer.

TL;DR: The scope and importance of model-based measurement in physiology and clinical medicine is outlined, describing the basic methods for modelling and the criteria to be adopted when choosing models for use in clinical measurement.

TL;DR: In this article, a monochromatic comparator pyrometer with a silicon photodiode as detector is presented, which can be used at any wavelength between 0.5 and 1 μm, depending upon the interference filter fitted.

TL;DR: In this article, basic principles of education and their application to engineering education are explained. But, the difficulty of mutual understanding of these principles is still a major obstacle for engineering educational institutions.

TL;DR: To facilitate the problems of remote vibration measurement of large structures, a video based instrument has been developed designed to produce a TV image of the object under investigation, together with the time variation of displacement within a target window superimposed on the image.

TL;DR: A signal-averaging technique suitable for processing some types of repetitive bio-electric pulsed signals in noisy environments and confirms that the recovered pulse shape is free from any appreciable distortion under certain approximations made for the analysis.

TL;DR: This paper describes special system configurations with their advantages and disadvantages of Electro-optical sensor systems offered which permit the automation of long-established and common measuring devices such as measuring microscopes and profile projectors.

TL;DR: In this paper, the Lagrangian movement of the tracer in a stationary, homogeneous flow is modeled as a second order statistic, characterised by correlation coefficients ad their integral scales, which is sufficient to signify experimental data.

TL;DR: In the case of Australia, requirements for manufacturers to establish traceability to other than the Australian standards cannot be technically justified except in rare instances as mentioned in this paper, and it would be a costly imposition on manufacturers to require them to establish direct traceability with the standards of every country with which they have contracts.