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IEEE Transactions on Instrumentation and Measurement

Issue 4  Part 1 • Dec. 1985

 This issue contains several parts.Go to:  Part 2 

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Displaying Results 1 - 25 of 26
  • Table of contents

    Publication Year: 1985, Page(s): c1
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  • IEEE Instrumentation and Measurement Society

    Publication Year: 1985, Page(s): c2
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  • Editorial

    Publication Year: 1985, Page(s): 489
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  • Methodology for Standard Electromagnetic Field Measurements

    Publication Year: 1985, Page(s):490 - 503
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3753 KB)

    Establishing standards for electromagnetic (EM) field measurements is a multifaceted endeavor which requires measurements made (1) in anechoic chambers, (2) at open-sites, and (3) within guided-wave structures, and the means to transfer these measurements from one situation to another. The underlying principles of these standard measurements and transfer standards fall into one of the two categori... View full abstract»

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  • An Evaluation of Josephson-Effect Voltage Standard for the US Army: A Preliminary Report

    Publication Year: 1985, Page(s):504 - 506
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (850 KB)

    The experimental procedure used and the results obtained on the evaluation of the Josephson-Effect Voltage (JEV) Standard at the US Army Primary Standards Laboratory (APSL) are reported. The inherent precision of measurement is 0.62 ppm (3??). The accuracy of the final result which is determined by various uncertainties is about 1 ppm. The Josephson junction (J-J) is used as a frequency-to-voltage... View full abstract»

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  • Errors in Sampled Data Phase Measurement

    Publication Year: 1985, Page(s):507 - 509
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (529 KB)

    Synchronous real-time sampling can be used to measure the phase angle ?? between two sine waves in a relatively low-frequency range. The data samples are acquired by a microcomputer-based system, then manipulated to determine ??. The system uses less hardware than a traditional phase meter, however there will be an error in ?? due to mislocating the zero-crossings of the two sine waves. An error a... View full abstract»

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  • A Precision Phase Angle Calibration Standard for Frequencies up to 50 kHz

    Publication Year: 1985, Page(s):509 - 516
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1420 KB)

    A Phase Angle Calibration Standard covering a frequency range from 2 Hz to 50 kHz has been designed and constructed. Digital waveform generation is used to provide sinusoidal analog outputs having precisely settable phase angles. Output voltages are independently adjustable from 0.5 to 100 V rms on both channels. An auto-zero feed back loop compensates for differential phase errors of the output a... View full abstract»

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  • Automatic Direct Volts Stability System

    Publication Year: 1985, Page(s):516 - 520
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (829 KB)

    The introduction of automatic test equipment to the production environment represented a milestone in manufacturing technology. The marriage of computer automation and precision measurement technology has produced many systems with capability never before thought possible, either economically or quantitatively. An automated test system using precision direct voltage measurement techniques, extende... View full abstract»

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  • Calibration of Standard Wattmeters Using a Capacitance Bridge and a Digital Generator

    Publication Year: 1985, Page(s):521 - 524
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (875 KB)

    A method for calibrating high-accuracy wattmeters is described. The technique is a modification of a previously described approach that utilizes a power bridge based on a current comparator. In such a bridge the test current of the wattmeter is balanced with a known current that is proportional to the test voltage. The measurement circuit described employs a high-voltage capacitance bridge in plac... View full abstract»

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  • A System Approach to Electric Measurements Helps in Understanding Measurement Methods

    Publication Year: 1985, Page(s):525 - 528
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (781 KB)

    As a contribution to the understanding of measurement methods, a system approach to electric measurement is described. The essential idea of the described approach is a uniform treatment of measurement problems and/or instrumentation as a special case of a system, the function of which is performed by signal processing. The correspondence between theory of measurement and a given measurement probl... View full abstract»

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  • Digital Distance Relay mho Elements Using Bit-Slice Technology

    Publication Year: 1985, Page(s):529 - 534
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Distance relays are a common method of protecting power transmission lines. This paper deals with a digital method for implementing mho elements of a distance relay. The method is based on calculation of an apparent impedance which is compared to a fixed circular characteristic. Digital mho elements have been designed and implemented using a bit-slice microprocessor and a fast array multiplier. Sa... View full abstract»

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  • A Linear Temperature-to-Frequency Converter Using an Integrable Colpitts Oscillator

    Publication Year: 1985, Page(s):534 - 537
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1471 KB)

    A novel temperature-to-frequency (T/F) converter using a thermistor has been developed. The resistance of the thermistor is converted into its equivalent inductance to form the resonant circuit of the Colpitts oscillator. To linearize the T/F conversion, two resistors, one in series and the other in parallel with the thermistor, are used and their values are determined so that the resultant resist... View full abstract»

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  • Spectrum Amplitude of Step-Like Waveforms Using the Complete-FFT Technique

    Publication Year: 1985, Page(s):537 - 540
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (679 KB)

    The complete Fast Fourier Transform (FFT) technique for the computation of the spectrum amplitude of step-like waveforms is presented in this paper. The complete FFT technique offers an enhanced resolution, and produces a dc and equally spaced harmonic components for the spectrum amplitude. The technique is applied to an analytical waveform in order to discuss its accuracy and analyze the associat... View full abstract»

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  • Deconvolution of Impulse Response from Time-Limited Input and Output: Theory and Experiment

    Publication Year: 1985, Page(s):541 - 546
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1175 KB)

    Since it is impossible to generate and propagate an impulse, often a system is excited by a narrow time-domain pulse. The output is recorded and then a numerical deconvolution is often done to extract the impulse response of the object. Classically, the fast Fourier transform (FFT) technique has been applied with much success to the above deconvolution problem. However, when the signal-to-noise ra... View full abstract»

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  • Natural Resonance Estimation

    Publication Year: 1985, Page(s):547 - 550
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (837 KB)

    The complex natural resonances of an object are of considerable utility in object classification studies. For geometrically complex object shapes and other than very low frequencies, the resonances must be extracted from measurements of scattering or radiation data. The purpose of this paper is to describe the extraction of the electromagnetic complex natural resonances from scattering data measur... View full abstract»

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  • Multivarable System Identification by Pencil-of-Functions Method

    Publication Year: 1985, Page(s):550 - 557
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1365 KB)

    For a multi-input multi-output system we determine the transfer function matrix parameters from the recorded multivariable input and output data. The measured outputs may represent the responses obtained at multiple receivers from a scatterer, or they may be the responses of a network at several nodes. Because of the intrinsic nature of real physical systems the problem is cast as a common-mode (i... View full abstract»

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  • Estimation of True Power Ratios in Six-Port Network Analyzers Using Diode Detectors

    Publication Year: 1985, Page(s):558 - 563
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (842 KB)

    A model for detector nonlinearity is included in the determination of six-port parameters without using additional standards. A computer simulation was performed assuming that the true power into each six-port detector is related to the power observed by the detector. Simultaneous estimation of the six-port and detector parameters is accomplished through a nonlinear least squares algorithm. Result... View full abstract»

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  • Characterization and Modeling of Thick-Film Components for Hybrid Microwave-Integrated Circuits

    Publication Year: 1985, Page(s):564 - 569
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1069 KB)

    Time-domain measurement techniques are used to characterize and model thick-Mim components for hybrid microwave-integrated circuits. Time-domain reflection (TDR) measurements are used to measure the input port's reflection transfer function of the component under test, while the time-domain transmission (TDT) measurements are used to measure its through-transmission transfer function. The models a... View full abstract»

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  • An Efficient Antialiasing Filter

    Publication Year: 1985, Page(s):570 - 573
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1574 KB)

    The application of a solid-state reference filter as an efficient antialiasing filter is described. The analytical basis for the efficiency of this filter is described and a specific example of measuring a 1024-point waveform with an RC filter and the solid-state filter is given. View full abstract»

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  • Mode-Stirred Chamber Calibration Factor, Relaxation Time, and Scaling Laws

    Publication Year: 1985, Page(s):573 - 580
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1013 KB)

    In this paper, single-mode cavity theory relating cavity Q, stored energy, and relaxation time is applied to mode-stirred chamber (MSC) operation. It is shown that a calibration factor for average power density, defined in terms of stored energy density, can be determined solely from a relaxation time measurement, for which a suitable measurement technique is also shown. A possible definition of m... View full abstract»

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  • Comparison of Failure Mode Criteria in Electromagnetic Environments

    Publication Year: 1985, Page(s):581 - 584
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (607 KB)

    Open field/ground plane test methods are generally used to evaluate the performance of equipment in electromagnetic environments. Laboratory enclosures with controlled environments in the form of transverse electromagnetic (TEM) cells, reverberation chambers, and anechoic chambers can overcome the disadvantages of remote outdoor test facilities. View full abstract»

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  • Sample Averaging and Rectify, Integrate, and Dump for Synchronous Demodulation Measurement of Mean Radiation

    Publication Year: 1985, Page(s):585 - 590
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1170 KB)

    A subsystem which implements two approaches for the synchronous demodulation and measurement of the mean intensity of chopped solar radiation has been designed and built as part of a microprocessor-controlled data acquisition system for the Laser Heterodyne Spectrometer (LHS) instrument built at NASA Langley Research Center, Hampton VA. One approach is based on a commonly used analog technique con... View full abstract»

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  • Application of Nonlineanty Measurng Method Using Two Frequencies to Electrcal Components

    Publication Year: 1985, Page(s):590 - 593
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Information of nonlinearity in voltage and current characteristics of electrical components has been used for finding their defect. A commonly used method is that the third-harmonic frequency produced by the nonlinearity is picked up as a measure of the nonlinearity, when a current of single frequency is given to the component. A method using two frequencies is introduced in this paper. In this me... View full abstract»

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  • Contributors

    Publication Year: 1985, Page(s):594 - 599
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  • [Advertisement]

    Publication Year: 1985, Page(s):599-a - 599-c
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Aims & Scope

Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications.

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Meet Our Editors

Editor-in-Chief

SHERVIN SHIRMOHAMMADI
School of EECS
University of Ottawa
800 King Edward Ave.
Ottawa, Ontario
K1N 6N5 CANADA
Fax: 613-562-5664
shervin@discover.uottawa.ca