Results 261 to 270 of about 338,016 (305)

Electromagnet type pickup device

The Journal of the Acoustical Society of America, 1979
An electromagnet type pickup device including a vibrating tubular member supporting a stylus-carrying cantilever and having a funnel-shaped engaging portion formed at one end, and including a tension wire having a bulging portion formed at one end, the other end being passed through the tubular member and secured thereto under tension so that the ...
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Optimizing Electromagnetic Devices

1993
The problem of optimum design has been studied for a long time. One of the earliest example was to find a 2-D shape which occupied the maximum area with its circumference as a given constant. Before the 1950’s classical mathematical methods such as the differential and variational methods were used to solve these problems.
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Explosive devices of electromagnetic signal

2005 15th International Crimean Conference Microwave & Telecommunication Technology, 2005
In this paper we will review the basic main types of explosive devices, which are offered as generators of oscillations. The results of model operation of these devices are submitted. The features of plasma columns shaped by explosive methods are defined.
A.H. Adzhiev, V.M. Goncharov, A.S. Tishchenko, O.V. Syrnik, V.A. Soshenko   +4 more
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Efficient electromagnetic energy harvesting devices

2015 IEEE Magnetics Conference (INTERMAG), 2015
Mechanical energy wasted due to the vibrations of different types of machine represents an attractive energy source for autonomous sensors systems being a good alternative to batteries, especially in the case when the solar energy is not available. The advantages of the electromagnetic harvesters are the large provided current/voltage and high output ...
M. Tibu, H. Chiriac, T. Ovari, N. Lupu
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COMPUTER OPTIMIZING OF ELECTROMAGNETIC DEVICES

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 1992
The optimization of geometric boundaries and placement of conductors to achieve specific design goals is the principle activity in computational electromagnetics. However the heuristic determination of design variables soon leads to total confusion as the user attempts to wrestle with multiple choices. Even if there are just two states for n parameters
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Inductances of Automotive Electromagnetic Devices

SAE Technical Paper Series, 2002
<div class="htmlview paragraph">A quantitative relationship between inductances and operating currents of automotive electromagnetic devices was necessary for experimentally assessing the nature of the spark that occurs when a current-carrying conductor in an automobile electrical system is broken.
H. S. Silvus, Robert E. White
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RFID-Based Reconfigurable Electromagnetic Devices

IEEE Journal of Radio Frequency Identification
Modern wireless communication systems are becoming increasingly necessary, emphasizing the need for electromagnetic devices that can flexibly operate under different conditions, e.g., under power constraints or in hostile environments where scattering objects randomly modify coverage areas and communication links.
Francesco Lestini, Gaetano Marrocco, Cecilia Occhiuzzi   +2 more
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Dynamic Measurements on Electromagnetic Devices

Bell System Technical Journal, 1953
A sampling switch with adjustable make and fixed break times can be used to obtain dynamic measurements of reciprocating phenomena. A test set has been developed using this principle to measure the flux-time, current-time, displacement-time, and velocity-time response of electromagnets and similar devices. The tested device is steadily cycled.
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Non-linear electromagnetic vibration device

The Journal of the Acoustical Society of America, 1989
A non-linear electromagnetic vibration device including a first vibration part and a second vibration part. A non-linear bellows plate spring set is connected between the first and second vibrating parts. Each spring set is composed of sequentially coupled bellows plate springs, and each plate spring is elastic according to a predetermined particular ...
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Transducer for electromagnetic hearing devices

The Journal of the Acoustical Society of America, 2009
A hearing system for producing audio signals perceptible to an individual. The hearing system includes a transducer having a surface adapted to attach to a middle-ear acoustic member of the individual, wherein the transducer is responsive to variations in a magnetic field emitted by a transmitter to directly vibrate the acoustic member. The transmitter
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