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IEEE Transactions on Instrumentation and Measurement

Issue 3 • Sept. 1974

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Displaying Results 1 - 23 of 23
  • Table of contents

    Publication Year: 1974, Page(s): c1
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1974, Page(s): c2
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  • Frequency Stabilization of X-Band Sources for Use in Frequency Synthesis into the Infrared

    Publication Year: 1974, Page(s):187 - 195
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1679 KB)

    An X-band source of excellent frequency stability is needed in infrared frequency multiplication of high order. Such a source has been used in frequency multiplication by a factor of 401 using a point-contact Josephson junction as a frequency multiplier and mixer. Noise data on three X-band systems are reported. Two of these systems use klystrons as the source of X-band power; the other uses a Gun... View full abstract»

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  • Analog-Multiplier Circuit Linearizes Transducer Output

    Publication Year: 1974, Page(s):195 - 197
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (574 KB)

    A circuit employing one operational amplifier and one analog multiplier is used to produce a voltage output proportional to the quantity t when the input voltage is related to t (e.g., temperature) by at + bt2, where a and b are constants. The determination of the resistor values, the useful operating voltage range, the accuracy of the linearizing process and the effects of changes in the ambient ... View full abstract»

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  • Numerical Controllers for Analytical Stereo Processing

    Publication Year: 1974, Page(s):198 - 202
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (951 KB)

    Precision positional controllers are an essential part of certain photogrammetric instruments of which the most universal and accurate is the Analytical Stereorestitutor. After a review of the concept of this instrument, the controller design for it is discussed. An aim is to free the machine computer to circulate real-time photogrammetric programs as rapidly as possible. Simple controllers which ... View full abstract»

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  • A Sonic Velometer

    Publication Year: 1974, Page(s):203 - 210
    Cited by:  Papers (3)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2412 KB)

    Wind-velocity measurement at remote winter mountain sites is hampered by icing of the moving parts of the measuring device and by restrictions on the amount of electrical power which is available. A sonic velometer which determines the wind velocity by measuring the transit times of sound pulses in air and has no moving parts has been developed. The sound pulse transit times are measured accuratel... View full abstract»

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  • Response or Hot Wire to Sound Pressure in an Airstream

    Publication Year: 1974, Page(s):211 - 214
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    An experimental investigation of the response of hot wire to plane acoustic waves in an airstream is presented. The sensing of the pressure fluctuations by the hot wire depends on the relative magnitude between the pressure fluctuations due to the acoustic waves and the velocity fluctuations due to the local turbulence. For low turbulence the results agree well with a mathematical analysis of the ... View full abstract»

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  • Improved Reactive Power Measurement through Precision Phase Angle Determination

    Publication Year: 1974, Page(s):214 - 217
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (933 KB)

    In the past, the accuracy of reactive measurement has been substantially limited by the precision with which two voltages in quadrature could be generated. A technique employing a commercially available electronic phasemeter has been developed whereby phase angles may be established very precisely. This technique is described in the context of reactive measurements, and other applications are sugg... View full abstract»

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  • Absolute Measurements for Small Loop Antennas for RF Magnetic Field Standards

    Publication Year: 1974, Page(s):217 - 221
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1588 KB)

    A method to determine accurately the strength of magnetic fields produced by a transmitting small loop antenna for the RF field standards is presented. The field strength can be determined by the magnetic dipole moment of the loop. A loop antenna factor is introduced to express the magnetic dipole moment of a transmitting small loop antenna in terms of the incident power to the antenna input port.... View full abstract»

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  • An Instrument for Measuring Deformations in Large Structures

    Publication Year: 1974, Page(s):221 - 226
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1928 KB)

    An instrument that has been developed for measuring the deformations in shape that result from the movement of a radio telescope reflector is described. A radar technique is used to measure distances from near the focal point of the reflector to selected points on the reflector surface. The short term accuracy of the instrument is ±0.003 in) and when used on the 140-ft telescope in Green Bank, W.... View full abstract»

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  • On Measurements of Noise in Low-Noise Receiving Systems

    Publication Year: 1974, Page(s):226 - 232
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1488 KB)

    A detailed theory of noise generation in waveguides reveals that the effect of standing waves may not in general be neglected, as has commonly been done in the past. Some special cases in which this standing-wave effect may be neglected are pointed out. The theory of a simple, cheap, and very accurate method for measuring the noise contribution of the input waveguide in very low-noise receiving sy... View full abstract»

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  • Calibration of Impulse Generators by Using Dicke-Type Radiometers

    Publication Year: 1974, Page(s):232 - 234
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (693 KB)

    Impulse generators are not conventional instruments and present their own calibration problems. A new method for calibrating the output spectral density level of impulse generators is explained. A Dicke-type radiometer is used for measuring the equivalent noise temperature of the output power spectral density which can easily be converted to the spectral density (amplitude). The switching sequence... View full abstract»

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  • International Comparison of Complex Permittivity Measurement at 9 GHz

    Publication Year: 1974, Page(s):235 - 239
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1235 KB)

    Dielectric constant and loss measurements made by three government laboratories (of the USSR, Canada, and the U. S. A.) are compared. The two materials measured were glasses. The measurements utilized cavity resonators in the H01n mode. The errors in dielectric constant reported by the laboratories were usually ± 0.3 percent; actual differences between laboratories of the average corrected result... View full abstract»

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  • Sonic Vibration Technique for Rot Detection in Wood Poles

    Publication Year: 1974, Page(s):240 - 244
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3260 KB)

    A new method is proposed for rot detection in wood poles such as those used for electricity distribution purposes. The test method has been developed to meet the problem of detection of concealed ground-line rot in full length preservative treated poles and appears to be capable of successfully achieving this end. A resonant sonic vibration technique is employed which is capable of detecting serio... View full abstract»

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  • An Inexpensive Digital Temperature Integrator

    Publication Year: 1974, Page(s):245 - 246
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1300 KB)

    An inexpensive thermistor-type digital temperature integrator for temperatures from 40 to 110°F is described. The baseline temperature above which integration occurs is adjustable from 40 to 60°F. The digital counter readout is in units of day-°F with 0.1 day-°F resolution and has an accuracy within ±2 percent of the indicated value. View full abstract»

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  • Reflection Coefficients of Offset Rectangular Waveguides at 56 GHz

    Publication Year: 1974, Page(s):246 - 247
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1148 KB)

    Measurements have been made at 56.2 GHz of reflection coefficients at the junction of two sections of 0.074- by 0.148-in rectangular waveguide, which are offset in the E or H plane. Special precautions were taken to preserve identical internal dimensions of the two sections at the junction. A special fixture was built to allow controlled offset movements. The experimental data show good agreement ... View full abstract»

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  • Comment on "A New Device for Measurements of Pulses or High-Frequency Currents"

    Publication Year: 1974, Page(s): 248
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  • Comments on "Dielectric Measurement of Sheet Materials"

    Publication Year: 1974, Page(s): 248
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  • Comment on "Dielectric Measurements of Sheet Materials"

    Publication Year: 1974, Page(s):248 - 249
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  • Reply by P. Bhartia

    Publication Year: 1974, Page(s): 249
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  • Contributors

    Publication Year: 1974, Page(s):250 - 252
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  • Membership Application IEEE Instrumentation & Measurement Group

    Publication Year: 1974, Page(s):252-a - 252-c
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1974, Page(s): 252-b
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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
K1N 6N5 CANADA
Fax: 613-562-5664
shervin@discover.uottawa.ca