Spectral Analysis of Acoustic Emission Signals Using NI Systems

Qin, Hong Wu; Li, Nian Feng; Li, Chun Feng

doi:10.4028/www.scientific.net/amr.663.507

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Base broadband signal characterizes expansion of its spectrum in comparison with a spectrum of an initial signal [5,6]. Expansion of a spectrum of frequencies can be carried out by multiplication of an initial signal to pseudorandom sequence with the period of recurrence T (including N bats pseudorandom sequence duration 0 everyone.…”

Section: B=ftmentioning

confidence: 99%

Research the Information Channels in Systems with Combined Data Using CDMA Method

Zhou

Qin

et al. 2015

AMM

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Research of technology CDMA has been made for use of data transmission in systems from the combined data and power supply transmission. As is known principles of code division of channels, are based on use of broadband signals which strip considerably exceeds the strip of frequencies necessary for usual message transfer, for example, in narrow-brand systems with frequency division of channels. In the article, As a result of multiplication of noise with an information signal energy of the last is distributed in a wide strip of frequencies. Its Spread spectrum, expansion of a spectrum with a passed signal, which is carried out by means of pseudorandom device for decoding the message should know coding sequence.

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Section: B=ftmentioning

confidence: 99%

Research the Information Channels in Systems with Combined Data Using CDMA Method

Zhou

Qin

et al. 2015

AMM

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“…This transducer might be an actuator, generator, or sensor, or some combination of the three. The design and performance of a Microelectromechanical systems device is to a large extent determined by the performance of its transducer [6][7][8] . As such, new transducer technologies can dramatically impact the capabilities of CCPS devices.…”

Section: Introductionmentioning

confidence: 99%

The Original Carbon-Copper Compound as a New Source of Electric Power

Kong

Xing²,

Zhou

2014

AMM

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The original method of electrochemical sedimentation of ultra-dispersed graphitefrom the colloid mixture on the polystalline copper cathode is designed.An interfacetransition region of several microns thickness is formed. Formation of electric potentialbetween the copper substrate and the graphite layer is observed. A mechanism of this effect is studied using the computer quantum mechanics simulation. A high level of precision cannot be maintained over large areas, so that large-area devices are currently difficult to fabricate. By contrast, we have noted that the dielectric elastomer actuators themselves set the gap, so that the gap can be formed in only a single step, film deposition on a flat surface. By using monolithic polymer substrates, one should be able to make large-area arrays of dielectric elastomer actuators.

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“…The destruction of constructional material structures, including polymers, is effective chemical medium [1][2] .the influence of the aggressive medium on polymer is expressed in changing its structure and properties without destructions of the material integrity (cracking, loosening or swelling of the material surface to a certain degree) or causing its destruction. For nondestructive testing (NDT) by acoustic methods it is often necessary to generate probe pulses of complex forms [3][4] . The effectiveness and reliability of results from this testing depends on the accuracy and ability to reproduce these pulses.…”

Section: Introductionmentioning

confidence: 99%

Research of the Chemico-Mechanical Practices in Polymer Material Processing by Cutting

Cheng

Wang

2014

AMM

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On the basis of the analysis of phenomenon, taking place when polymer material are in aggressive mediums and on the basis of experiments chemical influence on polymer workplaces before by cutting was proved. The analysis of phenomena taking place when polymers interact with aggressive mediums has been made. Corresponding experimental research has been done and methods to direct changes of proceed material have been developed. The changes happen when the surface layer is processed preliminary to lower resistance to destruction of workpiece surface layer when it interacts with cutting instrument later.

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Spectral Analysis of Acoustic Emission Signals Using NI Systems

Cited by 7 publications

References 4 publications

Research the Information Channels in Systems with Combined Data Using CDMA Method

Research the Information Channels in Systems with Combined Data Using CDMA Method

The Original Carbon-Copper Compound as a New Source of Electric Power

Research of the Chemico-Mechanical Practices in Polymer Material Processing by Cutting

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