# IEEE Transactions on Instrumentation and Measurement

## Filter Results

Displaying Results 1 - 25 of 25
• ### Embedded instrumentation for evaluating task sharing performance in a distributed computing system

Publication Year: 1992, Page(s):316 - 321
| | PDF (536 KB)

An example of application-level performance measurement on a distributed computing system using software-based instrumentation is considered. Embedded software instrumentation for measuring the performance of a decentralized adaptive task-sharing algorithm in a distributed computing system is described. For the application considered, the simplicity and flexibility provided by software-based instr... View full abstract»

• ### Measurement problems arising from the use of a recursive algorithm for model identification of electrical systems

Publication Year: 1992, Page(s):240 - 245
Cited by:  Papers (18)
| | PDF (488 KB)

The use of parameter estimation techniques in practical applications requires accurate analysis of the associated measurement and computation problems. With reference to an already proposed model identification procedure, the authors deal with the experimental tests carried out in order to highlight problems and to find the most appropriate solutions. In particular, a synchronization method is des... View full abstract»

• ### New method for reactive power and energy measurement

Publication Year: 1992, Page(s):280 - 285
Cited by:  Papers (19)
| | PDF (420 KB)

The properties of an electronic reactive power and energy measurement method based on a frequency-controlled power-to-pulse-rate conversion are analyzed. The reactive power and energy measurements can be efficiently performed by using a simple integrating circuit as a phase shifter, and frequency-controlled analog-to-pulse-rate converter. A low value of the output pulse rate should not be consider... View full abstract»

• ### Optimization and analysis of a capacitive contactless angular transducer

Publication Year: 1992, Page(s):311 - 315
Cited by:  Papers (7)
| | PDF (284 KB)

A capacitive angular transducer under development for industrial and military applications is described. An operational description based on the physical configuration of the transducer is presented in terms of a lumped parameter model. From the model, analytical operational performance criteria, i.e. frequency response and accuracy, are developed, analyzed, and supported with experimental data. M... View full abstract»

• ### Parametric identification of two-port models in the frequency domain

Publication Year: 1992, Page(s):233 - 239
Cited by:  Papers (18)  |  Patents (1)
| | PDF (508 KB)

The authors treat the problem of parametric estimation of linear time-invariant dynamic two-port models (e.g. the short-circuit admittance matrix) from experimental data. A multivariate frequency-domain Gaussian maximum likelihood estimator is proposed to estimate the unknown coefficients occurring in the rational two-port model. It takes the perturbing noise of all the measured voltages and curre... View full abstract»

• ### Simultaneous measurements of dynamic values using the transit time method

Publication Year: 1992, Page(s):251 - 255
Cited by:  Papers (1)
| | PDF (352 KB)

The problem of simultaneous and accurate measurements of two dynamic values, time dependencies of flow velocity and ultrasound velocity in the flow, is analyzed. In order to measure two dynamic values simultaneously a theory of the transit time method has developed, and the theoretical model of a microprocessor-based measuring system has been derived. The ways to improve the accuracy and informati... View full abstract»

• ### Process data chemometrics

Publication Year: 1992, Page(s):262 - 268
Cited by:  Papers (51)  |  Patents (3)
| | PDF (608 KB)

A data analysis technique successfully applied in spectroscopy to reduce a large quantity of data into meaningful information, called chemometrics, is discussed. Data when properly interpreted by statistical data analysis tools and fundamental and heuristic models yield meaningful information. The use of chemometrics as a multivariate analyzer to provide a composite measurement of the state of a c... View full abstract»

• ### Both active and reactive power and energy transfer standard

Publication Year: 1992, Page(s):274 - 279
Cited by:  Papers (7)
| | PDF (580 KB)

A thermal converter to DC voltage, with 10-ppm accuracy and a frequency range of 0-200 kHz, which can be used for active power measurements, has been developed using an infrared thermal converter. Moreover, a proposal for implementing, with lower accuracy, the converter for energy and reactive power is also illustrated View full abstract»

• ### Automated swept-angle bistatic scattering measurements using continuous wave radar

Publication Year: 1992, Page(s):185 - 192
Cited by:  Papers (25)
| | PDF (648 KB)

The establishment of the IEEE Electromagnetic Modeling Software Committee and the Department of Defense sponsored Electromagnetic Code Consortium indicates the electromagnetics community is interested in validating general electromagnetic modeling software. An important part of this validation is obtaining reliable bistatic scattering measurements on canonical scatterers. The author describes a si... View full abstract»

• ### A potentiostat based on a voltage-controlled current source for use with amperometric gas sensors

Publication Year: 1992, Page(s):308 - 310
Cited by:  Papers (16)
| | PDF (208 KB)

Amperometric gas-sensing devices develop a current that is proportional to the concentration of gas that is supplied to them. The circuit that maintains electrochemical stability in the sensor as well as buffering the current output is called a potentiostat. Some sensors used for gas sensing have very large electrode capacitances, which can result in instability with conventional potentiostat desi... View full abstract»

• ### The interpolated fast Fourier transform: a comparative study

Publication Year: 1992, Page(s):226 - 232
Cited by:  Papers (200)  |  Patents (2)
| | PDF (472 KB)

The properties of five interpolating fast Fourier transform (IFFT) methods (IFFT) are studied with respect to their systematic errors and their noise sensitivity, for a monofrequency signal. It is shown that windows with small spectral side lobes do not always result in a better overall performance of the IFFT method and that time-domain estimators can be more efficient than the analyzed IFFT meth... View full abstract»

• ### Filtering capabilities and convergence of the Van-Cittert deconvolution technique

Publication Year: 1992, Page(s):246 - 250
Cited by:  Papers (21)
| | PDF (412 KB)

The authors demonstrate the application of the Van-Cittert technique in iterative frequency-domain deconvolution. The technique is shown to have built-in filtering capabilities which can be used successfully to produce optimum deconvolution estimates. The Bennia-Riad optimization criterion for iterative deconvolution is jointly used with the Van-Cittert technique to optimize the number of iteratio... View full abstract»

• ### Measurement and analysis for stripline material parameters using network analyzers

Publication Year: 1992, Page(s):286 - 290
Cited by:  Papers (1)
| | PDF (360 KB)

The characterization of material parameters for dielectrics used in the construction of stripline and related structures is presented. The measured scattering parameters of transmission-line samples are used to predict the characteristics of the dielectric materials used in the construction in addition to effects due to rough dielectric-conductor interfaces. The measurements have been performed us... View full abstract»

• ### The influence of windowing on the accuracy of multifrequency signal parameter estimation

Publication Year: 1992, Page(s):256 - 261
Cited by:  Papers (115)
| | PDF (480 KB)

The author investigates the influence of windowing on the accuracy of a frequency-domain procedure suitable for real-time estimations of multifrequency signal parameters. Imposing very weak assumptions about the statistical description of the noise, simple and accurate expressions for the estimator variances are established. They allow both the evaluation of the result accuracy and the design of t... View full abstract»

• ### Calibration of an electronic multisensor system for measuring high pressures

Publication Year: 1992, Page(s):269 - 273
Cited by:  Papers (14)
| | PDF (336 KB)

An electronic system for measuring high pressures is considered. Its functioning is based on three fiber-optic transducers whose static characteristics are nonmonotonic and significantly influenced by temperature. A method for static calibration of this system is proposed, based on the use of spline functions of one variable. Its applicability in the considered case is demonstrated using synthetic... View full abstract»

• ### Analysis of symmetrical six-port junction when configured as a six-port reflectometer

Publication Year: 1992, Page(s):193 - 197
Cited by:  Papers (15)
| | PDF (340 KB)

The symmetrical six-port junction (together with a directional coupler and four power detectors) has in the ideal case been shown to be suitable for use as a six-port reflectometer. The author presents formulas that can predict the performance of such a reflectometer when the symmetrical six-port junction is nonideal. The results obtained indicate that in the presence of junction imperfections, it... View full abstract»

• ### EMI shielding measurements of conductive polymer blends

Publication Year: 1992, Page(s):291 - 297
Cited by:  Papers (258)  |  Patents (1)
| | PDF (628 KB)

Shielding efficiencies for a number of blends containing a variety of conductive fillers, including intrinsically conductive polymers, have been measured in the near field with a dual-chamber box and in the far field with a transmission line fixture. Although all samples satisfied the classical good-conductor approximation, most of them exhibited a crossover from being electrically thin (thickness... View full abstract»

• ### Video display terminal fringing magnetic field measurements

Publication Year: 1992, Page(s):178 - 184
Cited by:  Papers (3)
| | PDF (588 KB)

Possible occupational health or public health risks due to video display terminals (VDTs) are addressed. The authors note the errors of current jargon and correctly define the terms needed to describe the fringing magnetic flux density near any magnetically deflected, raster scan, cathode ray tube display. Theory and preliminary measurements have shown that the ELF AC electric field related to VDT... View full abstract»

• ### Scale-model design of a submillimeter-wave planar diode mixer

Publication Year: 1992, Page(s):198 - 202
| | PDF (392 KB)

The design of a planar diode submillimeter-wave mixer is presented in which scale models play an important role. By constructing larger scale models of mixer components, the design process is simplified by making component changes easier and by making the measurements easier with the aid of a network analyzer. Separate scale model measurements were used to find optimum diode geometry, a wide bandw... View full abstract»

• ### Measurement and evaluation of two-phase flow parameters

Publication Year: 1992, Page(s):298 - 303
Cited by:  Papers (9)
| | PDF (492 KB)

The fuzzy set theory and the flow-imaging technique were applied to measure the flow pattern and void fraction of two-phase flow. The flow pattern was identified online by using fuzzy identification', and an instrument system based on the flow-imaging technique was developed for online flow pattern measurement as well. The void fraction was evaluated online by fuzzy multifactorial evaluation'. T... View full abstract»

• ### A low-cost frequency multiplier for synchronous sampling of periodic signals

Publication Year: 1992, Page(s):203 - 207
Cited by:  Papers (40)
| | PDF (380 KB)

The theory of digital signal processing indicates clearly that the measurements performed on periodic signals by means of digital techniques are affected by an error due to the nonsynchronization between the sampling frequency and the signal frequency. The authors present a low-cost device, based on a frequency multiplier, that allows the generation of sampling pulses synchronized with the signal ... View full abstract»

• ### Testing of commercial optical media

Publication Year: 1992, Page(s):304 - 307
Cited by:  Papers (2)
| | PDF (316 KB)

Data integrity is a primary concern for the users of any data storage medium. For optical data storage, the integrity is directly related to the performance and defect level of the storage media and to how they change as the media age. While media materials and thin-film stack designs are chosen with the goal of achieving high data integrity and reliability, variations in the media manufacturing p... View full abstract»

• ### A 100-Msps sampling analog-to-digital converter chip set

Publication Year: 1992, Page(s):208 - 211
Cited by:  Papers (1)  |  Patents (1)
| | PDF (340 KB)

The authors describe a 100-Msps sampling analog-to-digital converter (ADC) chip set that can be used for a wideband high-resolution digital storage oscilloscope (DSO). A high conversion rate and a 500-MHz sampling bandwidth with an 8-b effective resolution are obtained by a combination of three Si-bipolar chips and two GaAs-diode chips. the ADC uses a pipelined two-step subranging architecture tha... View full abstract»

• ### A semifixed frequency method for evaluating the effective resolution of A/D convertors

Publication Year: 1992, Page(s):212 - 217
Cited by:  Papers (17)
| | PDF (380 KB)

A detailed description of a novel algorithm for the `effective bit' test in noncoherent conditions is presented. This algorithm can offer absolute convergence and has the potential for faster implementation than existing methods. A flow diagram for the algorithm and its implementation using the MATLAB package is included. The metrological reliability of input data is checked. An adopted ZEROIN pro... View full abstract»

• ### Some theorems on Walsh transforms of quantizer differential and integral nonlinearity

Publication Year: 1992, Page(s):218 - 225
Cited by:  Papers (23)
| | PDF (432 KB)

Methods for diagnosing weight coefficient tolerances of quantizers are derived, based on the assumption of known and available data about the quantizer's nonlinearities. Two of the methods are direct and based on the Householder orthogonalization, applied to an overdetermined equation system containing data about differential or integral nonlinearities. The remaining two methods are indirect and a... View full abstract»

## 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

Editor-in-Chief