The Institute of Physics ( IOP ) по журналам "Measurement Science and Technology"
Отображаемые элементы 1-20 из 2593
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(1998-09-01)The effect of a bubble on the virtual current of an electromagnetic flow meter is studied numerically with the bubble at various positions along the pipe axis of the flow meter. To solve the distribution of the virtual ...
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(1999-12-01)An optoelectronic system based on multi-pulse digital holography is used to measure three different displacement-vector components of a vibrating cylindrical object. Four pulses from a Q-switched ruby laser are used to ...
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(1998-03-01)This paper describes work which has been carried out to investigate a rotating stereoscopic imaging system consisting of two line-scan cameras for measurement. Algorithms have been proposed and experimentally tested which ...
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(1997-12-01)Three-dimensional particle tracking velocimetry (3D PTV) is a flow measurement technique for the determination of velocity vectors and trajectories within a three-dimensional observation volume. This makes this technique ...
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(1997-12-01)3D scanning particle image velocimetry (SPIV) provides particle images in a large set of parallel light-sheet planes using a rapid scanning light-sheet which samples the flow in depth from which the three-dimensional flow ...
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(1991-07-01)The authors describe new high-power RF generators that are designed for use in plasma physics research. Conventional vacuum tube final amplifiers are driven by amplitude-modulated generators that utilize power MOSFETS. The ...
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(1992-07-01)A simple method of constructing a multilayer wire-wound pulse magnet was developed by using ice with woven-glass cloth as a reinforcement spacer. Employing strong copper-wire embedded with Nb-Ti filaments, magnetic fields ...
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(1995-10-01)A simple, four-channel anti-coincidence circuit has been designed, using sequential logic, to deal with the problem of crosstalk that can arise when multi-element detectors are used in photon counting applications. This ...
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(1996-10-01)A 12-sensor hot-wire probe, capable of simultaneously measuring the velocity and vorticity vectors, is described. The probe is a further step in vorticity and velocity hot-wire measurement technique development, extending ...
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(1996-12-01)A new microprocessor-based measurement system using an LC resonance locking technique for capacitance measurement is presented. The measuring circuit automatically finds the resonance frequency and tracks its changes, which ...
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(1993-03-01)The long-term operation of a 1 kHz, 500 W transversely excited atmospheric CO2 laser has been realized by using an all-solid-state exciter. The laser system consisted of a fast-gas-flow tunnel containing a discharge head, ...
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(1994-07-01)A high-sensitivity, continuous-wave spectrometer for in vivo electron paramagnetic resonance imaging and spectroscopy of large samples is described. The magnet assembly has a sample bore of 0.5 m and continuous field ...
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(1998-06-01)This work investigates the feasibility of an ultrasound scanner designed to reconstruct three-dimensional profiles of objects in air. There are many industrial applications in which it is important to obtain quickly and ...
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(1998-08-01)The design, construction and performance of a novel optical profilometer based on the laser reading head of a compact disc player is described. The instrument is capable of self-guided scanning along arbitrary contours by ...
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(1999-12-01)This work describes the operational features of a software code that is designed to simulate the practical behaviour of modern high-frequency sonar systems. Versatility and flexibility is enhanced by a modular structure ...
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(1995-11-01)A high-power earthing switch suitable for use in a high-voltage laboratory has been designed, built, tested and is in operation. The design and operation of the switch is presented. It is shown that the system is free of ...
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(1997-02-01)We describe the design and use of a 48 mm diameter, liquid-helium-cooled MRI receiver coil and DC SQUID pre-amplifier. Comparison of images of a non-conducting room temperature test object collected with the SQUID-based ...
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(1992-08-01)Cascode connection of power MOSFETs is described and used to generate variable width 500 V (10 A) pulses with 2 ns rise times and 8 ns fall times. The advantage this configuration has over a simple grounded source configuration ...
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(1994-11-01)The experimental and computer modelling of the performance of a 24-stage coaxial line Marx generator are presented. Internal inductance, stray capacitance, coupling capacitance between the stages and switch characteristic ...
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(1993-01-01)The theory of measurement uncertainty outlined forms the mathematical foundation of the results of international discussions of many years. In contrast to the usual approaches in the literature, it is based entirely on ...
Отображаемые элементы 1-20 из 2593