Dr. Alexander E. Ekimov Profile

Dr. Alexander E. Ekimov

SDL Author at Univ of Mississippi

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Author

Publications (13)

Proceedings Article | 25 May 2012 Paper

Application of nodes with multiple orthogonal sensors in moving light vehicles study

Alexander Ekimov

Proceedings Volume 8388, 83880B (2012) https://doi.org/10.1117/12.917623

KEYWORDS: Sensors, Roads, Signal processing, Signal detection, Interference (communication), Acoustics, Data acquisition, Databases, Optical sensors, Signal analyzers

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Proceedings Article | 24 May 2012 Paper

Ultrasonic bistatic Doppler sonar in air for personnel motion detection

Alexander Ekimov, Craig Hickey

Proceedings Volume 8388, 83880C (2012) https://doi.org/10.1117/12.917624

KEYWORDS: Doppler effect, Ultrasonics, Transmitters, Receivers, Acoustics, Absorption, Sensors, Algorithm development, Motion detection, Spectral resolution

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Proceedings Article | 5 May 2009 Paper

Orthogonal sensor suite and the signal-processing algorithm for human detection and discrimination

Alexander Ekimov, James Sabatier

Proceedings Volume 7303, 73030K (2009) https://doi.org/10.1117/12.818823

KEYWORDS: Signal detection, Ultrasonics, Sensors, Doppler effect, Detection and tracking algorithms, Buildings, Signal processing, Radar, Motion measurement, Motion detection

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Proceedings Article | 5 May 2009 Paper

Standoff detection of obscured vehicle with laser Doppler vibrometer

Vyacheslav Aranchuk, James Sabatier, Alex Ekimov, Richard Mack

Proceedings Volume 7303, 73030H (2009) https://doi.org/10.1117/12.818400

KEYWORDS: Laser Doppler velocimetry, Acoustics, Doppler effect, LIDAR, Target detection, Standoff detection, Wind measurement, Speckle, Radar imaging, Sensors

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Proceedings Article | 16 April 2008 Paper

Range limitation for seismic footstep detection

James Sabatier, Alexander Ekimov

Proceedings Volume 6963, 69630V (2008) https://doi.org/10.1117/12.785235

KEYWORDS: Bandpass filters, Signal detection, Electronic filtering, Linear filtering, Signal to noise ratio, Interference (communication), Sensors, Filtering (signal processing), Optical filters, Spectral resolution

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Proceedings Article | 16 April 2008 Paper

Human detection range by active Doppler and passive ultrasonic methods

Alexander Ekimov, James Sabatier

Proceedings Volume 6943, 69430R (2008) https://doi.org/10.1117/12.775771

KEYWORDS: Doppler effect, Ultrasonics, Receivers, Absorption, Sensors, Acoustics, Ultrasonography, Buildings, Passive sonar, Spectral resolution

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Proceedings Article | 4 May 2007 Paper

Passive ultrasonic method for human footstep detection

Alexander Ekimov, James Sabatier

Proceedings Volume 6562, 656203 (2007) https://doi.org/10.1117/12.716899

KEYWORDS: Ultrasonics, Sensors, Absorption, Buildings, Signal attenuation, Signal detection, Signal to noise ratio, Ultrasonography, Data acquisition, System on a chip

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Proceedings Article | 12 May 2006 Paper

Feature based passive acoustic detection of underwater threats

Rustam Stolkin, Alexander Sutin, Sreeram Radhakrishnan, Michael Bruno, Brian Fullerton, Alexander Ekimov, Michael Raftery

Proceedings Volume 6204, 620408 (2006) https://doi.org/10.1117/12.663651

KEYWORDS: Acoustics, Signal to noise ratio, Signal detection, Interference (communication), Electronic filtering, Target detection, Environmental sensing, Sensors, Linear filtering, Detection and tracking algorithms

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Proceedings Article | 18 April 2006 Paper

Broad frequency acoustic response of ground/floor to human footsteps

Alexander Ekimov, James Sabatier

Proceedings Volume 6241, 62410L (2006) https://doi.org/10.1117/12.663978

KEYWORDS: Acoustics, Spectral resolution, Motion models, Sensors, Data acquisition, Ultrasonics, Calibration, Protactinium, Motion measurement, Linear filtering

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Proceedings Article | 21 September 2004 Paper

Resonance vibrations of buried landmines

Andrei Zagrai, Dimitri Donskoy, Alexander Ekimov

Proceedings Volume 5415, (2004) https://doi.org/10.1117/12.540670

KEYWORDS: Mining, Land mines, Soil science, Laser Doppler velocimetry, Solids, Acoustics, Mirrors, Oscillators, Velocity measurements, 3D metrology

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Proceedings Article | 18 August 2003 Paper

N-SCAN: new vibromodulation system for detection and monitoring of cracks and other contact-type defects

Dmitri Donskoy, Alexander Ekimov, Emile Luzzato, Jean-Louis Lottiaux, Stanislav Stoupin, Andrei Zagrai

Proceedings Volume 5057, (2003) https://doi.org/10.1117/12.484635

KEYWORDS: Modulation, Ultrasonics, Nondestructive evaluation, Transducers, Interfaces, Inspection, Nonlinear response, Acoustics, Nonlinear optics, Transmitters

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In recent years, innovative vibro-modulation technique has been introduced for detection of contact-type interfaces such as cracks, debondings, and delaminations. The technique utilizes the effect of nonlinear interaction of ultrasound and vibrations at the interface of the defect. Vibration varies on the contact area of the interface modulating passing through ultrasonic wave. The modulation manifests itself as additional side-band spectral components with the combination frequencies in the spectrum of the received signal. The presence of these components allows for detection and differentiation of the contact-type defects from other structural and material inhomogeneities. Vibro-modulation technique has been implemented in N-SCAN damage detection system. The system consists of a digital synthesizer, high and low frequency amplifiers, a magnetostrictive shaker, ultrasonic transducers and a PC-based data acquisition/processing station with N-SCAN software. The ability of the system to detect contact-type defects was experimentally verified using specimens of simple and complex geometries made of steel, aluminum, composites and other structural materials. N-SCAN proved to be very effective for nondestructive testing of full-scale structures ranging from 24 foot-long gun barrels to stainless steel pipes used in nuclear power plants. Among advantages of the system are applicability for the wide range of structural materials and for structures with complex geometries, real time data processing, convenient interface for system operation, simplicity of interpretation of results, no need for sensor scanning along structure, onsite inspection of large structures at a fraction of time as compared with conventional techniques. This paper describes the basic principles of nonlinear vibro-modulation NDE technique, some theoretical background for nonlinear interaction and justification of signal processing algorithm. It is also presents examples of practical implementation and application of the technique.

Proceedings Article | 13 August 2002 Paper

Nonlinear seismo-acoustic land mine detection: field test

Dmitri Donskoy, Alexander Ekimov, Nikolay Sedunov, Mikhail Tsionskiy

Proceedings Volume 4742, (2002) https://doi.org/10.1117/12.479140

KEYWORDS: Mining, Land mines, Soil science, Acoustics, Target detection, Nonlinear optics, Metals, Nonlinear response, Detection and tracking algorithms, Detector development

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Proceedings Article | 18 October 2001 Paper

Optimization of seismo-acoustic landmine detection using dynamic mechanical impedances of mines and soil

Dmitri Donskoy, Nikolay Sedunov, Alexander Ekimov, Mikhail Tsionskiy

Proceedings Volume 4394, (2001) https://doi.org/10.1117/12.445510

KEYWORDS: Mining, Land mines, Optimization (mathematics), Soil science, Metals, Interfaces, Affine motion model, Detection and tracking algorithms, Systems modeling, Dynamical systems

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Showing 5 of 13 publications

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