IEEE Transactions on Instrumentation and Measurement

Issue 4 • Dec. 1988

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Displaying Results 1 - 25 of 38
  • Electronic compensation of voltage transformers

    Publication Year: 1988, Page(s):652 - 654
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    A method for compensating ratio errors and phase displacements of measuring voltage transformers by a simple electronic circuit is introduced. This electronic compensator keeps the primary winding isolated from the secondary winding, so that it can be applied to voltage transformers in any kind of use. It also works with large load power variations. With this compensation, smaller and cheaper tran... View full abstract»

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  • A variable temperature test station for extraction of semiconductor device modeling parameters

    Publication Year: 1988, Page(s):610 - 614
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The authors describe the equipment and software necessary to integrate a variable-temperature setup and an automated data-collection system to extract semiconductor device modeling parameters over a wide temperature range. A cryogenic test station with a temperature range of 1.8-300 K is used for semiconductor device evaluation, with the test structure mounted in an 8-pin, TO-99-style header. The ... View full abstract»

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  • GPIB and the battle of incompatible languages

    Publication Year: 1988, Page(s):488 - 492
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The author outlines what the IEEE 488.1 and 488.2 standards cover with regard to operating language, what specifications are available, and detailed instructions on how to design a language which facilitates user tolerance. Various features of language design are considered, including mnemonics, minimum uniqueness, the command table, the required characters table, the offset table, and search rout... View full abstract»

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  • A simple design methodology for testable flash A/D converter output encoding

    Publication Year: 1988, Page(s):605 - 609
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A Boolean matrix technique is presented for the design of easily tested digital-encoding circuits to follow a flash analog-to-digital converter. The digital encoding is performed using a form of Reed-Muller network. The Reed-Muller configuration is known to be easily tested, but the design of this type of network to implement arbitrary logic equations is very difficult. The author demonstrates tha... View full abstract»

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  • High-Q plano-concave resonator with and without Straubel quartz for ultrasonic absorption measurements of liquids

    Publication Year: 1988, Page(s):648 - 651
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A resonator technique for the measurement of the sound absorption coefficient of liquids is described. It is designed for use at low frequencies with reasonably small sample values. The construction of a high-precision cylindrically shaped specimens cell is shown and results for different versions of the resonator are presented. The relative merits of using a Straubel quartz instead of a disc-shap... View full abstract»

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  • Determination of DC motor transients using a microcomputer

    Publication Year: 1988, Page(s):600 - 604
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    A method is presented to determine DC motor transients using an 8085-based microcomputer. The scheme was tested in the laboratory and results verified. The step response and the back electromotive force (EMF) constant have been determined for a small permanent-magnet DC micromotor. The results have been cross-checked with those obtained from a storage oscilloscope and the specifications of the man... View full abstract»

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  • Ultrasonic void estimation system for determination of liquids in microgravity tanks

    Publication Year: 1988, Page(s):642 - 647
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    An ultrasonic measurement technique has been developed for determining the quantity of liquid storage tanks in the microgravity environment. When the void fraction in a vessel is sufficiently small and the liquid wets the vessel, a spherical void interior to the liquid forms. The proposed procedure, the void estimate center technique (VECT), uses an iterative algorithm to compute the center locati... View full abstract»

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  • A power system digital harmonic analyzer

    Publication Year: 1988, Page(s):537 - 540
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The authors describe the design of a harmonic analyzer for use in studying the harmonic content of commercial electric power. This MC 68000-based instrument samples the waveform and calculates the first 63 harmonics of the 60-Hz fundamental for both a voltage and current waveform. The 64-kbyte memory is adequate for one week of hourly samples for a power-quality survey by an electrical utility. Th... View full abstract»

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  • Impact of digital signal processing on measurement and test instruments

    Publication Year: 1988, Page(s):519 - 524
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The authors discuss the impact of digital signal processing on test instruments and describe the use of a single-chip digital signal processor called TriStar whose architecture has been tailored for the instrumentation environment. TriStar instructions and programming are described, and attention is given to typical applications of TriStar, including averaging, fast Fourier transform, and interpol... View full abstract»

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  • Deep level transient spectroscopy: instrumentation induced anomalous characteristics

    Publication Year: 1988, Page(s):596 - 599
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The authors attempted to clarify, compare, and contrast some previously unpublished difficulties encountered in the operation of deep-level transient spectroscopy (DLTS) systems, and describe corrective measures where applicable, including instrumentation and deep level anomalies which may affect capture cross section designations, such as pulse squaring and degeneracy factor effects. Thermal lag ... View full abstract»

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  • CALIBRAT: a software for control and calibration of electronic measurement devices

    Publication Year: 1988, Page(s):497 - 500
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    CALIBRAT is a software package designed to facilitate quality assurance plan implementation, particularly in the French military establishment. CALIBRAT is intended to be used for a quality assurance plan for measurement devices (mainly multimeters). It includes a high-level language for writing control and calibration procedures and a result database for analysis. Complementary tools like operato... View full abstract»

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  • Application of electromagnetic energy in cancer treatment

    Publication Year: 1988, Page(s):547 - 551
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Radio-frequency (RF) and microwave heating techniques are reviewed. Clinical applications touched on include interstitial hyperthermia, ferromagnetic seed implants, local external hyperthermia, regional hyperthermia, and phased-array hyperthermia. Examples of heating patterns of various applicators are shown to illustrate the complex energy deposition of RF and microwave energy View full abstract»

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  • Single-mode fiber measurements

    Publication Year: 1988, Page(s):557 - 560
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The author discusses the various techniques used to characterize the following transmission parameters of single-mode fibers: attenuation, cutoff wavelength, mode-field diameter, and chromatic dispersion. The cutback method, the insertion-loss method, and optical time-domain reflectometry are considered for attenuation measurements. The single-band and power step methods are considered for cutoff-... View full abstract»

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  • Monitoring permanent-magnet motor heating with phosphor thermometry

    Publication Year: 1988, Page(s):637 - 641
    Cited by:  Papers (35)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The fiber-optic-conveyed, laser-induced fluorescence of a thermographic phosphor was used to measure the surface temperature of the rotor in an operating permanent-magnet motor. The technique uses a pulsed laser to interrogate a surface-bonded film of europium-doped lanthanum oxysulfide for the purpose of determining its temperature-dependent, exponential-decay lifetime. By using digital-delay cir... View full abstract»

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  • Accurate digital control and rotation of the phase of microwave signals

    Publication Year: 1988, Page(s):626 - 630
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A method of remotely controlling the phase and phase rates of low-frequency reference signals using digital techniques is described. These signals can, in turn, be used to control the phase of a microwave local oscillator in a phase array. The system, which was designed to control the phase of the local oscillators in a radio astronomy array called the Australian Telescope, gives phase resolution ... View full abstract»

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  • A drift-compensating precision divider technique using circular data patterns

    Publication Year: 1988, Page(s):533 - 536
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    A divider is described which is able to provide precision integer-to-one ratios (or those ratios nearby). The technique for using the divider compensates for most of the drift associated with resistive dividers. Data acquisition and reduction are based on flexible circular data patterns. An application of the divider is described where it is used to establish the relationship between 10-V solid-st... View full abstract»

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  • A high performance, variable capacitance accelerometer

    Publication Year: 1988, Page(s):569 - 571
    Cited by:  Papers (7)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A variable capacitance acceleration sensor is described. Manufactured using silicon microfabrication techniques, the sensor uses a midplane, flat plate suspension, gas damping, and overrange stops. The sensor is assembled from three silicon wafers, using anodic bonds to inlays of borosilicate glass. Typical sensor properties are 7-pF active capacitance, 3-pF tare capacitance, a response of 0.05 pF... View full abstract»

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  • A high speed data acquisition and analysis system for ultrasonic energy measurements

    Publication Year: 1988, Page(s):515 - 518
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    A high-speed microcomputer-based data acquisition and analysis system was designed and constructed. The system was interfaced to an ultrasound sector scanner. The primary application of the system, in this case, was to measure the power spectrum of the backscattered (low-level) ultrasound signal from acoustic inhomogeneous media, such as liver tissue. The system was bench-tested and then tested su... View full abstract»

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  • Measuring and fitting the MOS transistor at high frequencies

    Publication Year: 1988, Page(s):591 - 595
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A novel small-signal model of a MOS transistor is presented, which is valid at frequencies around the unity gain frequency. As a major advantage compared with earlier models, this novel model takes into account the nonquasistatic and transmission-line effects of the transistor. By using S-parameter measurements, computer-controlled calibration techniques of the test setup and network anal... View full abstract»

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  • A 1/fγ power spectrum noise sequence generator

    Publication Year: 1988, Page(s):615 - 619
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The authors discuss the design of a noise sequence generator that provides a stationary process that follows a 1/fγ law over a limited frequency band. The kind of noise is generated by passing a white-noise sequence in a digital filter characterized by a frequency-response-squared module proportional to 1/fγ. The design of the digital filter is ... View full abstract»

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  • A recent nationwide comparison of single mode optical fiber attenuation measurements

    Publication Year: 1988, Page(s):655 - 656
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    An interlaboratory measurement comparison was conducted by the Shanghai Institute of Testing Technology in China. Four single-mode fibers, having lengths of 6, 2, 2, and 1.6 km, were used. Measurements of attenuation at 1.3 μm and 1.55 μm gave one standard-derivation spread of 0.01, 0.02, 0.03, and 0.02 dB/km at 1.3 μm and 0.01, 0.09, 0.06, and 0.05 dB/km at 1.55 μm View full abstract»

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  • A modular and innovative software package for multichannel data acquisition

    Publication Year: 1988, Page(s):493 - 496
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A software package called Acquire is described which can control multichannel data acquisition equipment, collect and archive the data, analyze and present results in user-defined plot formats, and link together the individual tasks of a repetitive experiment to produce a fully automated turn-key solution. It is concluded that the modular structure of the described software can be customized quick... View full abstract»

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  • Measurement of instantaneous losses in switching power devices

    Publication Year: 1988, Page(s):541 - 546
    Cited by:  Papers (14)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    A novel technique is proposed for measuring instantaneous power and energy losses in static switching devices during the different operating intervals (turn-on delay, rise time, on-state, turn-off delay, full time, and off-state) of a switching cycle. To this end, a system for measuring voltages and currents is used, based on sampling at 200 Ms/s for data acquisition. The data are then transferred... View full abstract»

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  • Measuring harmonic distortion and noise floor of an A/D converter using spectral averaging

    Publication Year: 1988, Page(s):525 - 528
    Cited by:  Papers (44)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    The author proposes to use spectral averaging techniques to measure the harmonic distortion and noise floor of an analog/digital (A/D) digitizing subsystem. The noise floor of an ideal B-bit A/D converter is derived in closed form. It is shown that this noise floor is a function of the A/D resolution B, the record length N, and the equivalent noise bandwidth E View full abstract»

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  • Interfacing sensor assemblies with windowless cockpit displays

    Publication Year: 1988, Page(s):501 - 505
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    An interface for converting aircraft instrument information into a video display was created. Due to the limited development time available, the interface was divided into two subsystems. The goal of the division was to allow concurrent work on two major system components. The division used greatly aided the development, test, and calibration tasks. The key to being able to develop and test them s... View full abstract»

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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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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