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IEEE Transactions on Instrumentation and Measurement

Issue 1 • Feb. 1972

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Displaying Results 1 - 25 of 26
  • [Front cover]

    Publication Year: 1972, Page(s): c1
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1972, Page(s): c2
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  • Table of contents

    Publication Year: 1972, Page(s): 1
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  • Real-Time Measurement of Microwave Parameters and EM Fields

    Publication Year: 1972, Page(s):2 - 11
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2313 KB)

    A technique for making fixed-frequency or wide-band real-time measurements of reflection coefficients, transmission coefficients, and fields in open or closed structures at UHF and microwave frequency is given. The basic system uses two isolated channels, which originate from a common CW source, and one channel is single-sideband modulated. These two signals are then added and mixed in a (homodyne... View full abstract»

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  • Nondestructive Eddy Current Testing

    Publication Year: 1972, Page(s):11 - 15
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (709 KB)

    When a coil is placed in proximity to a conductor, the magnetic field in the vicinity of the coil is altered by eddy currents in the conductor. The conductivity of a sample material may be determined by measuring the field. Closed-form solutions are presented for the magnetic field at the surface of a semi-infinite conductor for two cases: a semi-infinite coil, the end of which is in contact with ... View full abstract»

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  • Generalized Analysis of Phase-Sensitive Detection-Circuit Operating Characteristics at the Signal Detection in the Presence of Noise

    Publication Year: 1972, Page(s):15 - 24
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2398 KB)

    A new generalized analysis is presented of operating characteristics of phase-sensitive detector circuits, assuming that the input signal and the reference wave are in the presence of independent, stationary, and additive Gaussian noise. The generalized criteria are determined for the detector optimum operating conditions and for minimization of the detector characteristic essential nonlinearities... View full abstract»

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  • 3700-4200-MHz Computer-Operated Measurement System for Loss, Phase, Delay, and Reflection

    Publication Year: 1972, Page(s):24 - 37
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6382 KB)

    A computer-operated transmission measurement set intended to support development work on microwave components for FM radio systems in the 3700-4200-MHz range is described. The instrument is capable of measuring the complete S-parameter set of the device under test, over a range from 20-dB gain to 70-dB loss. Accuracies of transmission parameters for small loss are ±0.002 dB, ±0.01°, and ±0.1 n... View full abstract»

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  • LF Adaptor Extends Vector Voltmeter Magnitude and Phase Measurements down to 10 Hz

    Publication Year: 1972, Page(s):37 - 40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (721 KB)

    An IC single-sideband modulator is described that allows direct measurement of magnitude and phase of a voltage over 3 decades anywhere in the range 10 Hz to 1 MHz. Two modulators generate a leveled upper-sideband (USB) reference signal about a 1-MHz suppressed carrier acceptable to the HP 8405A vector voltmeter. Another modulator produces a double-sideband (DSB) replica of the output voltage of t... View full abstract»

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  • Leak-Rate Determination Using Krypton 85

    Publication Year: 1972, Page(s):41 - 48
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1796 KB)

    An account is given of the krypton 85 test for determining leak rates of tubes evacuated to a pressure of ~10-8 torr. The minimum detectable air leak rate is of the order of 10-12 atm cc s-1, the limit being set by the background radiation and by the inaccuracy of dispensing a known-activity calibration standard. A description is given of the soak procedure and of the operation and calibration of ... View full abstract»

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  • Linearizing the Self-Heated Thermistor Thermometer

    Publication Year: 1972, Page(s):48 - 53
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1231 KB)

    A numerical method of linearizing a dc thermistor thermometer in which the power dissipated by the thermistor is sufficient to heat itself to a temperature significantly above ambient is developed and tested. It is shown that if the dissipation constant of the thermistor remains fixed, then the thermometer is able to detect temperature fluctuations considerably smaller than the internal temperatur... View full abstract»

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  • Dielectric Absorption in Memory Capacitors

    Publication Year: 1972, Page(s):53 - 56
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (745 KB)

    Experience from experiments with a sample and hold circuit showed that dielectric absorption constitutes a fundamental limitation of the accuracy in analog memories. To gain more insight into the problem several materials commonly used as dielectrics in capacitors have been investigated. The theory of dielectric absorption is discussed. Results from measurements on capacitors with paper, cellulose... View full abstract»

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  • The Measurement and Instantaneous Display of Bubble-Size Distribution, Using Scattered Light

    Publication Year: 1972, Page(s):56 - 59
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (909 KB)

    The need for an instrument that measures the bubble distribution in a flow is well documented by the numerous studies that are conducted on cavitation inception and cavitation damage to materials. The present measurement techniques do not provide a complete solution to these problems. In this short paper, we have developed an instrument that determines the bubble-size distribution by measuring the... View full abstract»

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  • A Temperature Monitoring System for Use on Normal Newborn Infants

    Publication Year: 1972, Page(s):59 - 60
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    A temperature-monitoring system for use on normal newborn infants is described. The device serves to alert the hospital staff to temperature excursions beyond an acceptable range. View full abstract»

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  • A Principle for Capacitance Measurement, Suitable for Linear Evaluation of Capacitance Transducers

    Publication Year: 1972, Page(s):60 - 64
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    A principle for measurement of capacitance is shown, together with a practical realization. The inherent linearity of output voltage as function of capacitance makes the principle advantageous for the evaluation of capacitance transducers. View full abstract»

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  • Chemical Array as a Position Detector

    Publication Year: 1972, Page(s):64 - 66
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    A position-detection system utilizing a chemical array is described. The array uses a continuous layer of inorganic compound in a resin material as the sensing medium, thus eliminating the element spacings that are the primary cause of error in discrete arrays with inactive gaps. The analysis of a one-dimensional chemical array with mechanical image perturbation is presented. Zero error-position d... View full abstract»

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  • Monostable Multivibrator as the Bridge Circuit with Linear Characteristic

    Publication Year: 1972, Page(s):66 - 69
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (721 KB)

    A monostable multivibrator, triggered by pulses of constant frequency, can be used as a bridge circuit either with capacitance or resistance transducers. The output voltage of the monostable multivibrator bridge is a linear function of transducer impedance. Sensitivity is four times higher compared with the Wheatstone bridge. View full abstract»

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  • A Very-High-Speed Analog Buffer with Analog-to-Digital Converter

    Publication Year: 1972, Page(s):69 - 74
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3727 KB)

    An analog signal with a bandwidth up to 100 MHz is temporarily stored in a relatively inexpensive analog buffer consisting of an oscilloscope screen image on the target layer of a vidicon tube. From this buffer 255 samples are taken, digitized (seven bits sample), and transferred to a digital computer or averager with a rate of 15 000 samples/s. The fastest fill time of the analog buffer is 50 ns,... View full abstract»

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  • Power Transient Monitor

    Publication Year: 1972, Page(s):74 - 77
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4623 KB)

    The power transient monitor is a specialized electric equipment developed to provide the capability of automatically and unattendedly recording randomly occurring power transients and disturbances in electric power systems. Twelve magnetic data channels record power waveforms and 14 pulse-voltage counters register the occurrence of pulse-voltage transients according to magnitude and duration. The ... View full abstract»

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  • Achieving Improved Position Detection Using a Modified Triangular Perturbation Signal

    Publication Year: 1972, Page(s):78 - 80
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (501 KB)

    High-resolution position detection using a one-dimensional zero-dead-band photosensor receptor has been shown [1] to be possible by applying a high-frequency triangular perturbation to a normalized target image. It is shown here that for a nonzero dead-band ¿ between the receptor elements, position detection becomes increasingly uncertain as ¿ increases. By periodically changing the magnitude of... View full abstract»

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  • A Hazard-Free Walsh-Function Generator

    Publication Year: 1972, Page(s):80 - 83
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB)

    Outputs of a Gray code counter are used to synthesize digital Walsh functions that are free from hazards. This method, which produces sequency-ordered Walsh functions, also uses a binary code to select the order. View full abstract»

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  • A Simple Stabilized Microwave Source

    Publication Year: 1972, Page(s):83 - 84
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  • Phase-Sensitive Detection of Nonperiodic Signals

    Publication Year: 1972, Page(s):84 - 85
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  • Comment on "Characterization of Frequency Stability"

    Publication Year: 1972, Page(s): 85
    Cited by:  Papers (2)
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  • Contributors

    Publication Year: 1972, Page(s):86 - 87
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1972, Page(s): 87-a
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    Freely Available from IEEE

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
Prof. Alessandro Ferrero
Dipartimento di Elettrotecnica
Piazza Leonardo da Vinci 32
Politecnico di Milano
Milano 20133 Italy
alessandro.ferrero@polimi.it
Phone: 39-02-2399-3751
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