IEEE Transactions on Instrumentation and Measurement

Issue 3 • Sept. 1979

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  • Table of contents

    Publication Year: 1979, Page(s): c1
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  • IEEE Instrumentation and Measurement Society

    Publication Year: 1979, Page(s): c2
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  • Electrooptical Blood-Spot Detection in Intact Eggs

    Publication Year: 1979, Page(s):177 - 183
    Cited by:  Papers (10)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2286 KB)

    An electrooptical measuring device has been developed for detecting blood spots in intact eggs based on the selective absorption of hemoglobin. The detection system performs a ratio measurement at two wavelengths with an accuracy and stability within 1 percent over a dynamic range of three decades of absolute egg transmittance values. Because of the very low transmittance level much care has been ... View full abstract»

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  • Synchronization of Clocks by Very-Long-Baseline Interferometry

    Publication Year: 1979, Page(s):184 - 187
    Cited by:  Papers (7)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (787 KB)

    Two hydrogen-maser clocks, one at the Haystack Observatory in Massachusetts and one at the National Radio Astronomy Observatory in West Virginia, were synchronized by means of very-long-baseline interferometry (VLBI) observations of several extragalactic radio sources on March 28, and again on September 23, 1977. Observations were made sequentially in eight 360-kHz bands distributed between about ... View full abstract»

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  • Transfer of Frequency Stability from an Atomic Frequency Reference to a Quartz-Crystal Oscillator

    Publication Year: 1979, Page(s):188 - 193
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1211 KB)

    This paper presents a study of the transfer of frequency stability from an atomic reference to a quartz-crystal oscillator. The study is done for the cases of active and passive atomic frequency standards in which one makes use of a phase-lock loop and of a frequency-lock loop, respectively. The analysis is made in both the frequency and time domains and covers the cases of the hydrogen and rubidi... View full abstract»

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  • Computer Simulation of the Conventional Clock Model

    Publication Year: 1979, Page(s):193 - 197
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (906 KB)

    The results of computer simulations of clocks, characterized by the power-law model of the spectral density of the normalized frequency fluctuations Sy(f) are described. The simulation generates slow fluctuations of the normalized frequency y, i.e., white (f0), flicker (f-1) and random walk (f-2) types. The two-smple Allan variance σ2y(τ) is used to test the spectral density of the... View full abstract»

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  • A New Method for Measuring Anisotropy at Microwave Frequencies

    Publication Year: 1979, Page(s):198 - 204
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1079 KB)

    A method for measuring electric or magnetic anisotropy at microwave frequencies is described. It is based on the effect produced by an anisotropic sample placed inside a square resonant cavity, on two originally degenerate and mutually independent modes. A coupling between the modes is created and, at the same time, the degeneracy is lifted and two distinct resonant frequencies appear. The theory ... View full abstract»

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  • The Cryo Current Comparator as a Calculable DC Ratio Standard

    Publication Year: 1979, Page(s):205 - 211
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1296 KB)

    Cryo current comparators (CCC's) are known as current ratio standards with small ratio errors. These small errors are easily proven for windings with 1:1 ratios only. For ratios other than 1:1, say 1: N, the errors must be determined by a step-up calibration procedure based on 1:1 intercomparisons of all windings. This procedure becomes tedious as N gets larger than 1. In addition the uncertainty ... View full abstract»

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  • A Universal Four-Pair Impedance Bridge

    Publication Year: 1979, Page(s):211 - 215
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1013 KB)

    A wide range 10 ppm four-terminal-pair audiofrequency impedance bridge is described. The bridge can be operated either in an impedance mode, for self-inductance, mutual inductance, and resistanre measurements; or in an admittance mode for capacitance and conductance measurements. The frequency range for full aecuracy is 40 Hz to 2 kHz. Maintenance of the calibration of the bridge is facilitated by... View full abstract»

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  • An Integrating Analog-to-Digital Converter for Differential Transducers

    Publication Year: 1979, Page(s):216 - 220
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1044 KB)

    An improved dual-slope analog-to-digital converter for measurements made with a pair of resistive or capacitive differential transducers is described. The converter can be contrasted with the conventional method in which the transducers are placed in a bridge, the bridge output is amplified, and the conversion is made. In the new converter the transducers are part of the integrator. As a result, c... View full abstract»

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  • A High-Speed Ultrasonic Sing-Around System

    Publication Year: 1979, Page(s):220 - 223
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1470 KB)

    An ultrasonic sing-around system has been developed that allows the measurement of the velocity of sound in a sample to an accuracy of a few parts in 104 in a period of 10 μs. A facility is also provided to store a succession of measured sing-around periods. This approach enables the continuous measurement of the velocity of sound in materials undergoing rapid changes of thermodynamic para... View full abstract»

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  • A Digital Instantaneous Frequency Meter

    Publication Year: 1979, Page(s):224 - 226
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (502 KB)

    A basic instrument is described which produces a parallel digital output proportional to frequency once per cycle, i.e., instantaneously. This is achieved by means of a reciprocal time generator which continuously generates digitally the reciprocal of the time elapsed between successive incoming pulses and the output of which is sampled and held at the end of each cycle. The meter is a 12-bit inst... View full abstract»

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  • A Novel Single-Multiplier Implementation of IIR and FIR Digital Filters Using Tri-State Logic

    Publication Year: 1979, Page(s):226 - 229
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1579 KB)

    A new implementation of digital FIR and IIR filters which takes advantage of the availability of tri-state logic for modularity and extensibility is outlined. The filter is a time-based design and uses a single multiplier. The sequence of operations for a second-order IIR filter with such an implementation is illustrated with the aid of a block diagram. View full abstract»

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  • Comments and Improvements on "Moir?? Displacement Transducer for N/C Systems"

    Publication Year: 1979, Page(s):229 - 230
    Cited by:  Papers (1)
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  • Comments on "Dual-Slope Integrating Converter with Digital Self-Calibration"

    Publication Year: 1979, Page(s):230 - 231
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  • Contributors

    Publication Year: 1979, Page(s):231 - 233
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  • Information for authors

    Publication Year: 1979, Page(s):234 - 235
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  • An invitation to membership

    Publication Year: 1979, Page(s): 235a
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  • IEEE Instrumentation and Measurement Society

    Publication Year: 1979, Page(s): 235b
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  • Institutional listings

    Publication Year: 1979, Page(s): 235c
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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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief

SHERVIN SHIRMOHAMMADI
School of EECS
University of Ottawa
800 King Edward Ave.
Ottawa, Ontario
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shervin@discover.uottawa.ca