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
  • 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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  • 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 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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  • Computer-aided design of induction watthour meter

    Publication Year: 1990, Page(s):47 - 53
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (564 KB)

    The author describes a newly established precise mathematical model and CAD (computer-aided design) algorithms for a high-overload induction watthour meter (the software package is called WATTCAD). The problem of computing the dynamic induced magnetic and electric systems of the watthour meter is solved in WATTCAD with three new nonlinear equivalent circuits. The Monte Carlo method for tolerance a... View full abstract»

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  • Measurement education from the viewpoint of the senior executive

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

    The author discusses the need and methods for providing continuing career education and training to metrologists and technicians throughout their careers, in order for them to keep pace with changing technology, new instrumentation, and career position changes 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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  • A study on the metal-flanged open-ended coaxial line terminating in a conductor-backed dielectric layer

    Publication Year: 1990, Page(s):43 - 46
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (116 KB)

    A spectral domain approach is used to analyze aperture fields and aperture admittance of an open-ended coaxial line terminated by a conductor-backed dielectric layer. The aperture admittance and capacitance at various frequencies and thicknesses are calculated for various dielectrics. It is shown that, for d⩾2b, the results are very close to those for the infinitely thick die... 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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  • 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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  • An algorithmic analog-to-digital converter using unity-gain buffers

    Publication Year: 1990, Page(s):227 - 231
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (252 KB)

    An algorithmic stage for bipolar 1-b analog-to-digital (A/D) conversion using a unity-gain buffer is proposed. Cyclic and pipeline A/D converter architectures using this stage iteratively or in cascade are also described. Error analysis and SPICE simulations show that a conversion accuracy higher than 8 b and a conversion rate up to 10 Mb/s are attainable with presently available 3-μm CMOS tech... View full abstract»

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  • Ada sizing, metrics and measures-learning from the past and forecasting the future

    Publication Year: 1990, Page(s):311 - 315
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (360 KB)

    It is noted that Ada has met with mixed successes owing to both differences in the technology applied to the program and differences in line counting and productivity measurement. The authors discuss the various technologies attributed to Ada and demonstrate methods of Ada size and productivity measurement that are appropriate for Ada and consistent with past data 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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  • A venous occlusion plethysmography using a load cell as the sensing element

    Publication Year: 1990, Page(s):38 - 42
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (328 KB)

    An application of the load cell as a sensor in venous occlusion plethysmography is presented. In this method the limb volume changes that follow venous occlusion are converted into water volume changes using a water tank for volume change detection. The hydrostatic pressure, as well as the water surface level, is measured and used for the calculation of the volume change. By using this method the ... View full abstract»

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  • Electrodynamics of materials for dielectric measurement standardization

    Publication Year: 1990, Page(s):2 - 7
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    Dielectric reference materials are analyzed in light of the fundamental requirements of linearity, homogeneity, and isotropy. The author presents generalized frequency- and temperature-dependent dispersion relations which allow the prediction of broadband dielectric behavior from limited measurement data, determination of valid modal field structure in cavity or waveguide fixtures, and identificat... View full abstract»

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  • The digital measurement of low values of angular velocity and acceleration

    Publication Year: 1990, Page(s):79 - 82
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (256 KB)

    An algorithm and the microprocessor implementation thereof for the measurement of angular velocity and acceleration of rotating machinery are presented. The speed reference signal is derived from a pulse train at a frequency of only one pulse per revolution. This fact places severe constraints on the resolution and measuring time of the instrument. To detect a rate of change of speed of 1 r.p.m./m... View full abstract»

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  • Real-time integration and differentiation of analog signals by means of digital filtering

    Publication Year: 1990, Page(s):346 - 352
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (400 KB)

    The performance of digital infinite impulse response (IIR) integrators and differentiators, calculated by means of a maximum likelihood estimator for transfer functions, is compared with that of their finite impulse response (FIR) counterparts and that of classical numerical integration and differentiation. An original design method that generates stable and reduced-order IIR filters in the comple... View full abstract»

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  • New strategies for fast ADC circuits

    Publication Year: 1990, Page(s):222 - 226
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (272 KB)

    A new strategy of successive approximation for fast analog-to-digital converter (ADC) circuits is discussed. A 4-b converter of one-cycle conversion time is first described. The scheme is then modified for flash conversion. The use of a 4-b flash converter in multiplex mode is shown to result in an 8-b converter requiring half-cycle conversion time. The bit subrangeable flash ADC is presented as a... 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 standardized instrument programming language based on IEEE Std 488.2

    Publication Year: 1990, Page(s):306 - 310
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (412 KB)

    The author describes the features of TMSL (Test and Measurement System Language) and how they relate to compatibility. TMSL implements a tree-structured command set, rather than a traditional flat instrument language, allowing keywords to be reusable and identifiable in context. Reusable keywords also allow for simple and regular mnemonic generation rules. TMSL also addresses parameters through th... View full abstract»

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  • Non-contact capacitive torque sensing on a rotating conductive axis

    Publication Year: 1990, Page(s):136 - 140
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB)

    A capacitive torque sensor in which two angular displacement sensors are spaced a well-defined distance apart is proposed. The rotor of each of these capacitive displacement sensors is composed of an array of electrodes connected to sine waves with phase angles in the sequence -0°-90°-180°-270°. These voltages are capacitively coupled from the stator to the rotor. The stator is als... View full abstract»

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  • Modeling a self-calibrating thermocouple for use in a smart temperature measurement system

    Publication Year: 1990, Page(s):94 - 99
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (448 KB)

    A smart temperature measurement system that consists of a commercially available self-calibrating thermocouple connected to a data-acquisition system with a specially designed algorithm capable of automatically detecting the calibration temperature of the self-calibrating thermocouple was developed. The self-calibrating thermocouple has a high-purity, low-melting-point metal encapsulated near its ... View full abstract»

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  • New triggering system and signal processing in digital oscilloscopes

    Publication Year: 1990, Page(s):148 - 151
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB)

    The authors have developed a 200-M sample/s digital oscilloscope that realizes the multigate triggering function and incorporates a 32-b RISC-(reduction-instruction-set-computer-) type processor and a floating-point coprocessor to execute various functional calculations and to display data on the screen. They describe a unique waveform triggering system (multigate triggering) and discuss the imple... View full abstract»

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  • The implementation of a digital sine-wave oscillator using the TMS320C25: distortion reduction and applications

    Publication Year: 1990, Page(s):14 - 18
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (360 KB)

    The implementation of a digital sine-wave oscillator using the TMS320C25 digital signal processor (DSP) is described. The system is implemented with the Dalanco Spry model 25 DSP board, and a software system is designed whereby an IBM PC host computer provides control of the waveform generator functions and parameters. Waveforms are generated using the look-up-table (LUT) method. The direct LUT me... View full abstract»

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