# IEEE Transactions on Instrumentation and Measurement

## Filter Results

Displaying Results 1 - 25 of 32
• ### Measurement of absolute distance employing a tunable CW dye laser

Publication Year: 1992, Page(s):36 - 39
Cited by:  Papers (6)
| | PDF (264 KB)

With a tunable CW dye laser oscillating in a single longitudinal mode, measurement of an absolute distance is demonstrated with the method of excess fractions. Five beams which have different wavelengths are emitted sequentially from the dye laser, and the interferometric phase is measured for each wavelength. An interferometric order number for a wavelength can be calculated from values of wavele... View full abstract»

• ### Source-pull/load-pull oscillator measurements at microwave/MM wave frequencies

Publication Year: 1992, Page(s):32 - 35
Cited by:  Papers (16)
| | PDF (312 KB)

A six-port reflectometer with variable test port impedance over 2-6 GHz was designed, built, and tested. The potential use of this reflectometer is in large signal characterization of negative resistance devices and oscillators. Experimental source-pull/load-pull measurements on a commercial oscillator (Rieke diagram) were performed using this reflectometer over the entire Smith chart View full abstract»

• ### A new instrument and technique for diagnosing electromagnetic design problems in microwave module housings and component packages

Publication Year: 1992, Page(s):27 - 31
Cited by:  Papers (4)
| | PDF (392 KB)

A method of measuring the frequencies at which resonances occur and the distribution of the associated electric field intensity at the inside face of the housing or package lid has been developed and tested. The method does not require modification of the connections to the microwave assembly within the housing. It is only necessary that the housing or package have a flat lid and that it be left o... View full abstract»

• ### Near-field calibration arrays for acoustic wavefield determination

Publication Year: 1992, Page(s):22 - 26
Cited by:  Papers (1)
| | PDF (464 KB)

The use of near-field calibration array (NFCA) to determine the far-field properties of acoustic receivers and projectors by measurements made in their near-field is described. When used as a projector to evaluate receivers, the NFCA produces a nearly uniform plane wave over a large volume in its near-field and over a large frequency range. When used as a receiver to evaluate projectors, the NFCA ... View full abstract»

• ### GaAs-based fiber-optic pressure sensor

Publication Year: 1992, Page(s):68 - 71
Cited by:  Papers (7)  |  Patents (1)
| | PDF (324 KB)

A new sensor developed for measurement of hydrostatic pressure up to at least 100 MPa at a standard range of ambient temperatures is described. The sensor exploits the displacement of the optical absorption edge occurring in semiconductors under the influence of hydrostatic stress as a result of pressure-induced energy shifting of conduction band extrema. The sensing element is composed of an intr... View full abstract»

• ### Probe-corrected spherical near-field scanning theory in acoustics

Publication Year: 1992, Page(s):17 - 21
Cited by:  Papers (8)
| | PDF (304 KB)

Spherical near-field scanning is often used in electromagnetics. The acoustical analog is outlined. Data are taken, with an arbitrary probe, on a spherical surface surrounding an unknown transducer. The algorithm uses these data to characterize the fields of the transducer everywhere outside the measurement sphere. The results can be corrected for probe effects if the probe's receiving pattern is ... View full abstract»

• ### Design concepts of instruments for vector parameter identification

Publication Year: 1992, Page(s):50 - 53
Cited by:  Papers (9)  |  Patents (1)
| | PDF (308 KB)

The concepts for design of phase-sensitive measuring instruments, based on two-phase synchronous detection, are proposed. The main idea of the design is to utilize the advantages of both analog and digital signal processing methods via combining the principles of synchronous detection and averaging with the principles of integrating analog-to-digital and functional digital-to-analog conversion View full abstract»

• ### A review on the development of piezoelectric composites for underwater acoustic transducer applications

Publication Year: 1992, Page(s):64 - 67
Cited by:  Papers (12)
| | PDF (244 KB)

For future sonar transducer applications that emphasize the detection of acoustical signals in a hydrostatic mode, new piezoelectric composite materials have been developed. Ceramic-polymer composites having 1-3' and 0-3' connectivity patterns are shown to exhibit much higher sensitivities than conventional PZT ceramics. Glass-ceramic composites are free of aging, and have potential applications... View full abstract»

• ### A device for measuring the concentration and dispersion quality of magnetic particle suspensions

Publication Year: 1992, Page(s):10 - 16
Cited by:  Papers (4)
| | PDF (516 KB)

A technique, called rheomagnetic measurement, for studying the concentration and orientation of magnetic particles through inductance measurement is presented. The particles are oriented in a predominantly extensional flow field, and, because they are magnetic, their orientation can be detected with a weak magnetic sensing field. Because flocs of magnetic particles orient differently in a flow fie... View full abstract»

• ### A calorimeter for μW level optical power transfer standard

Publication Year: 1992, Page(s):45 - 49
Cited by:  Papers (1)
| | PDF (344 KB)

A calorimeter which can measure microwatt-level optical power has been developed for an optical power transfer standard. It can measure the optical power of a light beam and can be used with optical fiber simply by attaching an adapter. This calorimeter sensor uses a compensative absorber to reduce the influence of pressure fluctuation and temperature variation in the measurement room and an ultra... View full abstract»

• ### A room temperature setup to compare the quantized Hall resistance with 1-Ω standards

Publication Year: 1992, Page(s):59 - 63
Cited by:  Papers (8)
| | PDF (424 KB)

A method has been developed to relate the mean value of the Istituto Elettrotechnico Nazionale Galileo Ferraris (IEN) primary group of 1-Ω standard resistors to the i=2 quantum level of the Hall resistance. It is based on an automated potentiometric system, a 36×360-Ω Hamon network, and a commercial Kusters current comparator bridge. Descriptions of the equipment and of ... View full abstract»

• ### Digital time-of-flight measurement for ultrasonic sensors

Publication Year: 1992, Page(s):93 - 97
Cited by:  Papers (153)  |  Patents (1)
| | PDF (384 KB)

Ultrasonic sensor measurements are mostly based on the determination of the time of flight (TOF). The development of a digital algorithm for pulse-echo measurement applications, based on the use of a cross-correlation function to determine the TOF, is presented. Some experimental results are presented, and the possibility to realize a low-cost real-time measurement system is considered View full abstract»

• ### A switched-capacitor interface for capacitive pressure sensors

Publication Year: 1992, Page(s):81 - 86
Cited by:  Papers (54)  |  Patents (139)
| | PDF (364 KB)

A switched-capacitor interface for a capacitive pressure sensor is developed which provides a linear digital output. It consists basically of a sample/hold circuit followed by a charge-balancing analog-to-digital converter. The sensor capacitance changes hyperbolically with an applied pressure. To convert the nonlinear capacitance change into the linear digital output, two linearization methods ar... View full abstract»

• ### Dispersion quality measurement and particulate magnetic coating properties

Publication Year: 1992, Page(s):3 - 9
Cited by:  Papers (1)
| | PDF (524 KB)

The use of a rheomagnetic instrument which provides an indirect measure of the dispersion quality of a magnetic ink suspension used for coating application in the manufacture of magnetic recording disks is described. The instrument was designed, tested, and put on a pilot line to study the relationship between the dispersion quality measurement and functional characteristics of the magnetic coatin... View full abstract»

• ### Measuring the temperature dependence of resistivity of high purity copper using a solenoid coil (SRPM method)

Publication Year: 1992, Page(s):107 - 110
Cited by:  Papers (8)
| | PDF (268 KB)

The resistivity of high purity copper was measured by a method which estimates it by using the difference in the impedance between a circular multilayer solenoid coil with a circular rod-shaped copper sample and a similar coil without a copper sample (SRPM method). The residual resistivity ratio (RRR) of high purity copper measured at 100 Hz by the SRPM method has correlated well with the values m... View full abstract»

• ### Low-noise automated measurement system for low-frequency current fluctuations in thin-oxide silicon structures

Publication Year: 1992, Page(s):123 - 127
Cited by:  Papers (7)
| | PDF (380 KB)

The design of an automated system for low-noise measurement of low-frequency current fluctuations in thin-oxide silicon devices is presented. The aim of these measurements is to study the current tunneling through the oxide, and to investigate its correlations with the oxide breakdown. The dedicated system is realized by integrating a personal computer commercial acquisition board with custom desi... View full abstract»

• ### Measurement of signal parameters using nonlinear observers

Publication Year: 1992, Page(s):152 - 155
Cited by:  Papers (28)
| | PDF (284 KB)

Recursive measurements of signal parameters that are nonlinear functions of observations require nonlinear observers. A method to design absolutely stable observers for multiple-output time-varying nonlinear free dynamic systems is presented. Because of the high computational burden of absolutely stable observers the authors have developed a computationally efficient globally, but not absolutely, ... View full abstract»

• ### Compact and high-precision range finder with wide dynamic range and its application

Publication Year: 1992, Page(s):40 - 44
Cited by:  Papers (59)  |  Patents (8)
| | PDF (372 KB)

Described is a new range finder using a self-mixing laser diode (SM-LD). The range finder has a high accuracy of ±0.15% and a wide dynamic range of 0.2-1 m using only one sensor head. Compared to ultrasonic range finders, the light beam of this laser range finder can be focused and scanned. The feasibility study shows a possible application of the range finder to a visual sensor of a robot.... View full abstract»

• ### Fiber-optic strain-gauge manometer up to 100 MPa

Publication Year: 1992, Page(s):72 - 76
Cited by:  Papers (8)  |  Patents (1)
| | PDF (436 KB)

A practical realization of a novel pressure transducer utilizing a fiber-optic strain sensor and an active element configured to simulate an infinite cylinder with free ends is described. The deformation of such a cylinder depends uniquely on pressure acting from its inside and is independent of the stress resulting from the attachment of the device to the pressure system. The fiber-optic strain s... View full abstract»

• ### Parameter correlation of impulse shapes using two-port synthesis

Publication Year: 1992, Page(s):54 - 58
Cited by:  Papers (1)
| | PDF (308 KB)

The authors derive equations for determining the time constants of the double exponential impulse from the commonly used parameters for several standard test impulses. They then proceed to synthesize a resistor-capacitor (RC) prototype circuit that will produce the desired impulse. The prototype network is realized through a computer-aided design (CAD) procedure using Cauer's RC ladder two-port sy... View full abstract»

• ### A method of improving the resolution and accuracy of rotary encoders using a code compensation technique

Publication Year: 1992, Page(s):98 - 101
Cited by:  Papers (65)  |  Patents (2)
| | PDF (280 KB)

A method of improving the resolution and accuracy of incremental type rotary encoders using a phase encoding and code compensation system is described. Applying this system to an optical incremental encoder whose scale pitch is 1/3600 rotation, results in a resolution of up to 1/920000 rotation, and better than ±1/300000 rotation (±0.0012°) precision is obtained View full abstract»

• ### Active tactile perception of object surface geometric profiles

Publication Year: 1992, Page(s):87 - 92
Cited by:  Papers (20)
| | PDF (512 KB)

The authors discuss an experimental robotic system using a 16×16 tactile sensor and an instrumented passive-compliant wrist developed specifically for the active (exploratory) perception of geometric profiles of object surfaces. A 2-D correlation technique is used to recover from planar position errors which occur during the sequential tactile probing View full abstract»

• ### Microwave moisture measurement of grains

Publication Year: 1992, Page(s):111 - 115
Cited by:  Papers (29)  |  Patents (5)
| | PDF (436 KB)

A two-parameter transmission technique is described for online, in situ measurement of the bulk moisture content of grains using microwaves. This noncontacting 4.9-GHz system is configured so that a well-collimated TEM beam is transmitted through a layer of grain, e.g., moving on a conveyer or flowing in a chute. The changes in attenuation and phase serve as two independent measurement parameters ... View full abstract»

• ### Electrooptic characterization of organic media

Publication Year: 1992, Page(s):128 - 131
Cited by:  Papers (6)  |  Patents (3)
| | PDF (308 KB)

The authors have developed an electrooptic characterization apparatus based on an AC-modulated Senarmont compensator. The apparatus is particularly suitable for studying the electrooptic response of thin polymer films. The system is capable of measuring the Pockel's effect at a variety of wavelengths with a minimum phase shift sensitivity of 1 μrad. Sample-to-sample variations in the coefficien... View full abstract»

• ### Signal enhancement of nonsynchronized measurements for frequency domain system identification

Publication Year: 1992, Page(s):156 - 159
Cited by:  Papers (2)
| | PDF (324 KB)

The possibilities of an a posteriori synchronization of nonsynchronized data records are investigated for the purpose of signal enhancement of a periodic signal. The theoretical background for an effective frequency domain method is given, and the errors of the averaged complex amplitudes are calculated. The time delay between records is identified via maximum likelihood estimation, which is sligh... 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