scispace - formally typeset
Search or ask a question

Showing papers in "Measurement in 2002"


Journal ArticleDOI
TL;DR: In this paper, the uncertainties contributed by different sub-systems within the LIST apparatus are analyzed and a general expression for uncertainty estimation is also developed, and the measurement uncertainties associated with the LIST technique are presented.

95 citations


Journal ArticleDOI
TL;DR: The system will be developed in the context of a surveillance and monitoring task, principally targeted at tracking people through indoor and outdoor environments, and learn the relationships between each camera viewpoint and the scene under observation.

55 citations


Journal ArticleDOI
TL;DR: In this article, a fiber Bragg grating measuring system is presented to detect dynamic seismic signals in underground structures, rock mass and bridges, and an adaptive filtering algorithm is proposed and applied to the noise reduction and the detectability of seismic signals.

54 citations


Journal ArticleDOI
TL;DR: The digitising system is analysed so that each source of inaccuracy can be isolated, and the quality of digitised points obtained with noncontact probes is described.

44 citations


Journal ArticleDOI
TL;DR: It is shown how a Monte Carlo method, based on numerical simulations and implemented with commercial software packages, can allow virtual instruments to perform an auto-evaluation of both bias and uncertainty affecting their results.

44 citations


Journal ArticleDOI
TL;DR: In this paper, a histogram procedure using small-amplitude triangular waves superimposed on suitable constant offset values is proposed to improve the static test conditions for analogue-to-digital converters.

42 citations


Journal ArticleDOI
TL;DR: In this article, the authors describe the design of a new facility which is under construction at the Physikalisch-Technische Bundesanstalt for the calibration of force transducers with impulse forces.

40 citations


Journal ArticleDOI
TL;DR: In this article, the use of a digital signal processing method, based on the Continuous Wavelet Transform, is suggested for automatically detecting and measuring the time-of-flight between ultrasonic echoes thus improving ultrasonic image understanding of complex structures.

40 citations


Journal ArticleDOI
TL;DR: A formula for the output error power due to sampling clock jitter for a sinusoidal input is derived and verified by numerical simulations, and its spectrum characteristics is shown.

38 citations


Journal ArticleDOI
TL;DR: In this paper, the authors investigated the strain distributions of a parallel plate structure (PPS) for measuring three components of a force, a moment and a torque, and designed a double PPS for measuring six components of forces and moments and predicted output strains.

38 citations


Journal ArticleDOI
TL;DR: An automatic fault diagnosis technique based on a fuzzy approach to the detection and the isolation of single soft faults in analog electronic circuits and its performance is analyzed by means of two examples.

Journal ArticleDOI
TL;DR: A carefully chosen PLL structure is shown to cope with input data having high noise and a wide spread of possible frequency, and indicates the improvement in performance over that of a classical PLL, an all-digital PLL and a ZC algorithm.

Journal ArticleDOI
TL;DR: A novel idea for the measurement of linear and circular raster scales is described, given by the determination of a bias from a straight line and from a circle, respectively.

Journal ArticleDOI
TL;DR: In this article, the squared amplitudes received by two co-planar probes simultaneously scanning a near-field planar surface are used to retrieve the near field phase information and subsequently to perform the nearfield/far-field transformation.

Journal ArticleDOI
TL;DR: An account of the in-field trials performed in order to assess the behaviour of the tyre pressure monitoring system in a ‘real world’ environment is given.

Journal ArticleDOI
TL;DR: In this paper, an improved method for the direct measurement of the bulk thermal conductivity of super-hard materials in a stationary regime is described, based on a technique known as the "squeezing" of the heat flux at the flat specimen-cone-shaped indentor interface.

Journal ArticleDOI
Don Hummels1
TL;DR: Recent ADC calibration procedures will be presented which speed the calibration process by several orders of magnitude, and highly linear DACs are desirable, since they may be used as calibration sources for ADCs, and are often fundamental building-blocks of high-resolution ADCs.

Journal ArticleDOI
TL;DR: The frequency domain technique is proposed as a good practical tool for implementing linearization in A/D converters with dither, and the peculiar nature of the static characteristic of dithered converters makes the third method particularly attractive.

Journal ArticleDOI
TL;DR: In this paper, a technique to measure the locations and orientations of apertures, and their diameters, on the spout nozzle of an engine is presented and a complex measuring apparatus designed for the purpose is discussed.

Journal ArticleDOI
TL;DR: In this paper, a two-dimensional spark locations by electromagnetic detection method in electrical discharge machining (EDM) is studied. But the method is based on the fact that the release of energy from a spark is transformed into an electromagnetic wave around the workpiece.

Journal ArticleDOI
TL;DR: A self-correction algorithm based on the self-calibration of an approximate algorithm under correction for accuracy improvement of approximate algorithms in digital signal processing, parameter estimation, etc.

Journal ArticleDOI
TL;DR: In this article, an accurate description of a combination water meter is provided and the main results of calibration tests are presented, and final considerations about the reliability of the combination meter in very wide flow range applications are also reported.

Journal ArticleDOI
TL;DR: The physicochemical process that occurs during the operation of fuse elements under excessive or heavy fault currents is complex and not well understood as discussed by the authors, and measurements obtained using analog/digital (A/D) converters are presented and the observed phenomena are investigated.

Journal ArticleDOI
TL;DR: In this paper, a framework for achieving required measurement quality is proposed and discussed for each operation level, subjects involved are identified, concerned actions are considered and integration and harmonisation are addressed.

Journal ArticleDOI
TL;DR: The maximum unexcluded remainder of a transducer for the piece-wise linear approximation of several variables function is found and the approaches to definition of the parameters of the polynomial function are examined.

Journal ArticleDOI
TL;DR: In this paper - after general considerations - another implementation is presented, running under MATLAB, which will hopefully extend the number of the users of the methods described in the draft standard IEEE-STD-1241.

Journal ArticleDOI
TL;DR: This paper starts with an analysis of ADC hysteresis errors considering their effect on the quantization error and effective number of bits of an ADC system, and concludes with a study of the improvements obtained using dithering in over sampled ADC systems with hysteResis errors.

Journal ArticleDOI
TL;DR: In this article, a method to carry out optical interferometric measurements for the surface roughness of spheres in a biomedical application to an artificial joint, using two beams of a Michelson inter-ferometric microscope with digital image processing and a computational system, is discussed.

Journal ArticleDOI
Patrick P Fasang1
TL;DR: A method of digital noise coupling reduction is discussed to highlight the fact that analog circuits may not work properly unless measures are taken to minimize the digital noise that is coupled to the analog circuit portions of a mixed analog–digital silicon die.

Journal ArticleDOI
TL;DR: This paper analyses the most utilized architectures and identifies the basic (active and passive) building blocks used and guidelines on how to design the circuit in order to meet specifications are given.