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7th IEEE Conference on Instrumentation and Measurement Technology

13-15 Feb. 1990

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Displaying Results 1 - 25 of 81
  • How good is your calibration? A post-mortem examination and recalibration

    Publication Year: 1990
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (24 KB)

    Summary form only given. It is pointed out that the standard network analyzer calibration procedure suffers from several drawbacks. The test patterns, for instance, often reside on a wafer different from that being tested. The normal procedure is to measure only a single set of calibration patterns instead of collecting a statistically significant sample spanning the wafer. Wafer thickness uniform... View full abstract»

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  • Conference Record. IEEE Instrumentation and Measurement Technology Conference (Cat. No.90CH2735-9)

    Publication Year: 1990
    Request permission for commercial reuse | PDF file iconPDF (81 KB)
    Freely Available from IEEE
  • Novel approaches to optical reflectometry

    Publication Year: 1990, Page(s):329 - 333
    Cited by:  Papers (2)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The author reviews the fundamentals of optical reflectometry, including the standard optical time-domain reflectometry (OTDR) measurement. Some novel reflectometry schemes are described, including a spread-spectrum approach to long-range OTDR, as well as new optical frequency-domain reflectometry (OFDR) techniques that have proven useful for high-resolution measurements. These novel reflectometry ... View full abstract»

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  • Measurement standards to support photonics technology

    Publication Year: 1990, Page(s):326 - 328
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    It is noted that standards to support the emerging photonics/lightwave technology industry can be classified into two groups: physical primary standards maintained by national standards laboratories and standard measurement procedures agreed upon by domestic and international voluntary standards bodies. The measurement of absolute optical power leads the prioritized list of primary standards needs... View full abstract»

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  • The VXIbus from an instrument designer's perspective

    Publication Year: 1990, Page(s):280 - 285
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The VXIbus specification defines a technically sound modular instrument standard addressing electrical, mechanical, electromagnetic compatibility (EMC)/power, and communication requirements for modules. The standard does not cover certain information that is critical to the instrument module designer. For this reason, it becomes necessary for a VXIbus instrument manufacturer to define an internal ... View full abstract»

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  • A user-friendly environment for the generation of highly portable software in computer-based instrumentation

    Publication Year: 1990, Page(s):320 - 324
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The authors present an innovative software environment for the development of libraries of DSP (digital signal processing) routines in computer-based instrumentation. The goal of this approach is to combine user-friendliness with wide portability of the results. For this purpose, an integrated architecture for a development environment has been developed; it includes a user-friendly editor, which ... View full abstract»

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  • CAMAC, an ideal high-performance data acquisition standard

    Publication Year: 1990, Page(s):272 - 279
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    It is suggested that CAMAC (computer-automated measurement and control) provides an ideal solution for high-performance data acquisition system requirements, such as high-accuracy A/D (analog-to-digital) conversion, a large channel capacity, and physically distributed channels. A wide variety of CAMAC I/O modules provides the analog and discrete interfaces needed for high-performance systems. Thes... View full abstract»

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  • A review of IEEE pulse standards 194 and 181

    Publication Year: 1990, Page(s):296 - 301
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    The author presents a brief history of the development of the IEEE pulse standards and outlines their organization and content with emphasis on old terms with new names and new terms. It is noted that these standards (and their International Electrotechnical Commission counterparts) are applicable to a wide range of pulse measurement situations ranging from automatic instruments that digitize, sto... View full abstract»

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  • An electronic high-pressure measuring system using a polarimetric fiber-optic sensor

    Publication Year: 1990, Page(s):63 - 65
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    An electronic, microcontroller-based system for high-pressure measurement, using a novel fiber-optic sensor, is presented. Attention is given to the problem of how to deal with a nonmonotonic (sinelike) characteristic of the sensor as a function of input pressure. The concept of a multisensor system is discussed, and a three-sensor, microcontroller-based, `on-a-card' version of the system is propo... View full abstract»

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  • Additional information from flowmeters via signal analysis

    Publication Year: 1990, Page(s):187 - 193
    Cited by:  Papers (6)  |  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The need to enhance the performance of process instrumentation systems by applying modern signal processing techniques has been identified as one of the priority areas for research and development in process instrumentation and process control. It is pointed out that this performance enhancement can be in the form of extracting additional information from flow sensors beyond the customary requirem... View full abstract»

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  • A robotic tactile perception system concept

    Publication Year: 1990, Page(s):132 - 135
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    An experimental robotic tactile system is under development to characterize and identify three-dimensional (3-D) objects through a procedure of active sequential exploration. The experimental setup is described, and a data fusion technique for precise object identification is presented. Preliminary test results demonstrate that overlapping tactile exploration allows recovery from sensor/target mis... View full abstract»

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  • Software for personal instruments

    Publication Year: 1990, Page(s):316 - 319
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The main features of a PI (personal instrument) are discussed, and the requirements for PI software are derived. Then the performance of an original software package for PI is illustrated, showing how all requirements were satisfied. The software, coupled to a good commercial data acquisition system, features high-precision measurement and a high level of friendliness. It can be effectively employ... View full abstract»

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  • Measurement of the dielectric properties of materials by using time domain reflectometry

    Publication Year: 1990, Page(s):263 - 269
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The authors present some TDR (time-domain-reflectometry) applications for complex permittivity measurements for strong polar liquid in the frequency range of 1 to 35 GHz, liquid crystal from 100 kHz to 1 GHz, and ionic microemulsion at frequencies between 30 MHz and 20 GHz. In each case, the necessary TDR techniques for optimal condition are given. The new TDR system (HP54120A+HP54121A) used has e... View full abstract»

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  • A robust six-to-four port reduction technique for the calibration of six-port microwave network analysers

    Publication Year: 1990, Page(s):111 - 114
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The authors introduce a simple method by which the robust calibration technique developed by S.K. Judah (1985) may be unified with the thru-reflect-line technique, yielding initial estimates of the six-port instrumental parameters that are insensitive to noise and random errors. This calibration technique has been employed in a single six-port reflectometer operating at 2 GHz. Experimental experie... View full abstract»

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  • Bridging the gap between design and testing of analog integrated circuits

    Publication Year: 1990, Page(s):232 - 235
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    It is noted that an important problem associated with analog and mixed analog/digital VLSI design has been the lack of a systematic approach to the design and testing of such integrated systems. The authors describe a computer environment that brings the different design aspects closely together. It has been used successfully to analyze the performance of high-speed flash analog/digital converters... View full abstract»

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  • Broadband analog performance of laser diodes

    Publication Year: 1990, Page(s):339 - 344
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The performance characteristics of semiconductor laser diodes for wideband analog transmission have been investigated. The distortion characteristics of such devices were determined by measurement of the laser's light-current transfer characteristic and also by means of multicarrier harmonic distortion measurements. The noise characteristics were determined by measurement of the laser's relative i... View full abstract»

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  • Voltage calibration systems using Josephson junction arrays

    Publication Year: 1990, Page(s):291 - 294
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The authors review the fundamentals of Josephson voltage standards and show how computer control makes these standards simple to use in a variety of applications. It is noted that the accuracy and stability of voltage standards based on the Josephson effect far surpass those of all other voltage-standard devices. The voltage generated is independent of environmental and material characteristics be... View full abstract»

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  • High-speed motion analysis as a measurement tool

    Publication Year: 1990, Page(s):67 - 68
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    It is noted that, as engineering, manufacturing, packaging, and quality testing processes have become faster and more complex, the need to record and analyze events that happen in milliseconds or less has become critical. Companies in electronics, aerospace, automotive, packaging, paper converting, and textiles are using high-speed motion analysis to diagnose and solve problems from basic research... View full abstract»

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  • Accurate optical proximity detector

    Publication Year: 1990, Page(s):141 - 143
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    A ratiometric optical proximity sensor which measures the distance between an approaching object and the sensor within a range of 1 cm to about 10 cm is described. With the proposed method, the influence of the reflection coefficient and the orientation of the object is strongly reduced. The sensor can be used in robot grippers and in other applications where contactless measurement of short dista... View full abstract»

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  • Optimal FIR and IIR Hilbert transformer design via LS and minimax fitting

    Publication Year: 1990, Page(s):240 - 243
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A novel method for the design of digital finite impulse response (FIR) and infinite impulse response (IIR) Hilbert transformers using the least squares (LS) and the minimax criteria is presented. The LS approximation is performed in the complex domain. Also presented is an iterative extension of the algorithm, which results in a minimax (Chebyshev) approximation, also in the complex domain. For FI... View full abstract»

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  • On the measurement and the modelling of the correlated noise sources corrupting the marine geological echosounding experiments

    Publication Year: 1990, Page(s):353 - 359
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The modeling of the power spectral density of correlated noise sources in acoustic measurements in a marine environment is considered. The Belgian oceanographic vessel, the Belgica, was used for measurements of the noise generated by helixes, engines, stabilizers, the `fish' incorporating the transducers, the waves, and the marine background noise. Classical estimators, such as the periodogram, as... View full abstract»

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  • Design for testability using behavioral models

    Publication Year: 1990, Page(s):75 - 78
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The authors present a systematic approach to analog design-for-testability which uses behavioral models for fault simulation so that objective comparisons can be made between alternative test configurations. This technique of design-for-testability is shown to be especially well suited to an ASIC's (application-specific integrated circuits') environment because the models can be reused and combine... View full abstract»

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  • The grammar of metrology

    Publication Year: 1990, Page(s):84 - 86
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    The author notes that the technical grammar of metrology is given in the ISO (International Organization for Standardization) publications ISO 1000 and ISO 31/0. A related document is `The International System of Units (SI)/Le Systeme International d'Unites (SI)' currently in its fifth (1985) edition. Some of the highlights of `SI' and some of the common mistakes made by users of these documents a... View full abstract»

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  • Metrology education for the information age

    Publication Year: 1990
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    It is suggested that metrology education should be very diverse and serve both the person who wishes to be a generalist and the person who wishes to be a specialist in the field. In addition, it should serve the needs of people in many fields who will find the concepts of metrology useful in their work. It is emphasized that metrology needs to become an integral part of the intellectual property o... View full abstract»

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  • A microstep controller of a DC servomotor

    Publication Year: 1990, Page(s):60 - 62
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    A microstep controller of a DC servomotor has been developed for accurate positioning and smooth movement at low-speed rotation. It consists of digital and analog positioning loops. Dividing one period of quadrature sinusoidal signals, generated by an incremental encoder attached to a motor shaft, into four quarter sections, the digital loop controls the movement between the sections. The analog l... View full abstract»

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