Dr. Yogadhish Das Profile

Dr. Yogadhish Das

Defence Scientist at Defence Research and Development Canada

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 29 April 2008 Paper

Study of the influence of the plastic casing on the electromagnetic induction response of a buried landmine

Y. Das

Proceedings Volume 6953, 695302 (2008) https://doi.org/10.1117/12.776699

KEYWORDS: Optical spheres, Land mines, Metals, Soil science, Sensors, Magnetism, Aluminum, Electromagnetism, Composites, Electromagnetic coupling

Read Abstract +

Proceedings Article | 7 May 2007 Paper

Effects of magnetic soil on metal detectors: preliminary experimental results

Y. Das

Proceedings Volume 6553, 655306 (2007) https://doi.org/10.1117/12.717939

KEYWORDS: Optical spheres, Soil science, Sensors, Magnetism, Metals, Magnetic sensors, Aluminum, Data modeling, Transmitters, Receivers

Read Abstract +

Proceedings Article | 18 May 2006 Paper

The Canadian Forces ILDS: a militarily fielded multisensor vehicle-mounted teleoperated landmine detection system

John McFee, Kevin Russell, Robert Chesney, Anthony Faust, Yogadhish Das

Proceedings Volume 6217, 62172G (2006) https://doi.org/10.1117/12.663109

KEYWORDS: Sensors, Land mines, Mining, Prototyping, Data fusion, Photovoltaics, Cameras, Imaging systems, Detection and tracking algorithms, Head

Read Abstract +

Proceedings Article | 17 May 2006 Paper

Effect of the soil on the metal detector signature of a buried mine

Pascal Druyts, Yogadhish Das, Christophe Craeye, Marc Acheroy

Proceedings Volume 6217, 62170Q (2006) https://doi.org/10.1117/12.666954

KEYWORDS: Mining, Optical spheres, Magnetism, Metals, Free space, Land mines, Explosives, Soil science, Sensors, Receivers

Read Abstract +

Proceedings Article | 16 May 2006 Paper

Physical model of soil and its implications for landmine detection interference

T. Katsube, E. Grunsky, Y. Das, R. DiLabio, H. McNairn, S. Connell-Madore, E. Gauthier, N. Scromeda

Proceedings Volume 6217, 62170N (2006) https://doi.org/10.1117/12.664428

KEYWORDS: Minerals, Land mines, Iron, Landsat, Remote sensing, Soil science, Corrosion, Signal detection, Earth observing sensors, Ferromagnetics

Read Abstract +

Proceedings Article | 16 May 2006 Paper

Time-domain response of a metal detector to a target buried in soil with frequency-dependent magnetic susceptibility

Y. Das

Proceedings Volume 6217, 621701 (2006) https://doi.org/10.1117/12.663970

KEYWORDS: Optical spheres, Sensors, Soil science, Magnetism, Target detection, Metals, Receivers, Transmitters, Signal detection, Magnetic sensors

Read Abstract +

Proceedings Article | 10 June 2005 Paper

Rapid mapping of soil electrical conductivity by remote sensing: implication for landmine detection and vehicle mobility

T. Katsube, H. McNairn, Y. Das, E. Gauthier, R. Holt, V. Singhroy, R. DiLabio, S. Connell-Madore, L. Dyke

Proceedings Volume 5794, (2005) https://doi.org/10.1117/12.602825

KEYWORDS: Soil science, Radar, Backscatter, Remote sensing, Land mines, Sensors, Signal detection, Satellite imaging, Satellites, Associative arrays

Read Abstract +

Proceedings Article | 10 June 2005 Paper

Electromagnetic induction response of a target buried in conductive and magnetic soil

Y. Das

Proceedings Volume 5794, (2005) https://doi.org/10.1117/12.601266

KEYWORDS: Magnetism, Sensors, Electromagnetism, Metals, Target detection, Soil science, Optical spheres, Signal detection, Receivers, Magnetic sensors

Read Abstract +

Proceedings Article | 21 September 2004 Paper

Soil moisture and electrical conductivity prediction and their implication for landmine detection technologies

T. John Katsube, Pierre Keating, Heather McNairn, Yogadhish Das, Ron DiLabio, Vern Singhroy, Shauna Connell-Madore, Mel Best, James Hunter, Rod Klassen, Larry Dyke

Proceedings Volume 5415, (2004) https://doi.org/10.1117/12.542521

KEYWORDS: Soil science, Minerals, Remote sensing, Radar, Land mines, Magnetism, Sensors, Electromagnetism, Agriculture, Ferromagnetics

Read Abstract +

Proceedings Article | 21 September 2004 Paper

A preliminary investigation of the effects of soil electromagnetic properties on metal detectors

Yogadhish Das

Proceedings Volume 5415, (2004) https://doi.org/10.1117/12.541364

KEYWORDS: Sensors, Metals, Magnetism, Soil science, Electromagnetism, Land mines, Geophysics, Magnetic sensors, Sensor performance, Receivers

Read Abstract +

Proceedings Article | 11 September 2003 Paper

Soil information requirements for humanitarian demining: the case for a soil properties database

Yogadhish Das, John McFee, Kevin Russell, Guy Cross, T. John Katsube

Proceedings Volume 5089, (2003) https://doi.org/10.1117/12.486306

KEYWORDS: Land mines, Sensors, Soil science, Electromagnetism, Metals, Magnetism, Databases, Explosives, Sensor performance, Magnetic sensors

Read Abstract +

Proceedings Article | 11 September 2003 Paper

Prediction and validation of soil electromagnetic characteristics for application in landmine detection

T. John Katsube, Rod Klassen, Yogadhish Das, Richard Ernst, Tom Calvert, Guy Cross, J. Hunter, Mel Best, R. DiLabio, Shauna Connell

Proceedings Volume 5089, (2003) https://doi.org/10.1117/12.486983

KEYWORDS: Minerals, Magnetism, Particles, Land mines, Electromagnetism, Soil science, Iron, Climatology, Agriculture, Ferromagnetics

Read Abstract +

Proceedings Article | 11 September 2003 Paper

Canadian landmine detection research program

John McFee, Yogadhish Das, Anthony Faust

Proceedings Volume 5089, (2003) https://doi.org/10.1117/12.485956

KEYWORDS: Land mines, Sensors, Imaging systems, Mining, Hyperspectral imaging, Prototyping, Soil science, Electromagnetism, Infrared imaging, Explosives

Read Abstract +

Proceedings Article | 11 September 2003 Paper

GPR for antipersonnel landmine detection: results of experimental and theoretical studies

J. Redman, A. Annan, Yogadhish Das

Proceedings Volume 5089, (2003) https://doi.org/10.1117/12.487260

KEYWORDS: General packet radio service, Land mines, Mining, Sensors, Antennas, Polarization, Surface roughness, Electromagnetism, Target detection, Reflectivity

Read Abstract +

Proceedings Article | 13 August 2002 Paper

Limitations in identifying objects from their time-domain electromagnetic induction response

Yogadhish Das, John McFee

Proceedings Volume 4742, (2002) https://doi.org/10.1117/12.479151

KEYWORDS: Optical spheres, Electromagnetic coupling, Data modeling, Electromagnetism, Land mines, Metals, Computer simulations, Sensors, Signal to noise ratio, Error analysis

Read Abstract +

One of the long-standing goals in landmine and UXO detection research has been to identify metal objects based on their electromagnetic induction~(EMI) responses. An often-pursued approach is to model the time-domain response of an object with a sum of damped real exponentials whose amplitude and decay coefficients are related to the object's geometric and electromagnetic properties. Using this model, a measured response can be processed, by a number of techniques, in an attempt to extract the associated amplitude and decay coefficients of the constituent exponentials. These coefficients can be potentially related to the object's physical properties. Some years ago the authors investigated this approach using computer simulated data with added noise. Even for the simple case of a sphere, it was not possible to reliably and uniquely estimate the amplitudes and decay constants, particularly in the absence of some a priori information about the object. The basic problem is that damped real exponentials are highly correlated functions. That is, while it is easy to fit a response with a sum of these exponentials, the accuracy of the estimate of their parameters (amplitude and decay constants) is not guaranteed, making it difficult to relate extracted parameters to object properties. The paper illustrates this point using the EMI response of a sphere and the characteristics of fitting exponential sums to data. For objects more complex than the sphere, there will be additional problems such as the dependence of the response on object orientation and depth. In practice, the problem will be exacerbated by low signal strength (particularly for minimum metal landmines), uncertain or unknown object location and depth and the occurrence of a large number of false targets, some of which will have responses which are statistically identical with that of the target being sought. As well, a false target in the proximity of a real target will alter or totally mask the response of the latter.

Proceedings Article | 13 August 2002 Paper

Electromagnetic characteristics of Cambodian soil: implication for land mine detection in soil containing ferromagnetic minerals

John Katsube, Rod Klassen, Yogadhish Das, Keith Benn, Mel Best, Richard Ernst

Proceedings Volume 4742, (2002) https://doi.org/10.1117/12.479155

KEYWORDS: Minerals, Magnetism, Land mines, Soil science, Electromagnetism, Particles, Iron, Hematite, Quartz, Ferromagnetics

Read Abstract +

Proceedings Article | 18 October 2001 Paper

Laboratory in-air testing of metal detectors

Yogadhish Das, Jack Toews, Kevin Russell, John McFee

Proceedings Volume 4394, (2001) https://doi.org/10.1117/12.445465

KEYWORDS: Sensors, Target detection, Head, Land mines, Metals, Sensor performance, Calibration, Signal detection, Manufacturing, Data modeling

Read Abstract +

Proceedings Article | 2 August 1999 Paper

Articulated robotic scanner for mine detection: a novel approach to vehicle-mounted systems

Yogadhish Das, Kevin Russell, Nenad Kircanski, Andrew Goldenberg

Proceedings Volume 3710, (1999) https://doi.org/10.1117/12.357028

KEYWORDS: Sensors, Land mines, Head, Laser range finders, Robotics, Metals, Ultrasonics, Prototyping, Roads, Scanners

Read Abstract +

Proceedings Article | 2 August 1999 Paper

Real-time target detection technique for metal detector arrays: an image processing approach

Kevin Russell, Yogadhish Das, John McFee, Robert Chesney

Proceedings Volume 3710, (1999) https://doi.org/10.1117/12.357110

KEYWORDS: Sensors, Metals, Target detection, Land mines, Detection and tracking algorithms, Detector arrays, Signal detection, Image processing, Electromagnetic coupling, Data fusion

Read Abstract +

Proceedings Article | 4 September 1998 Paper

Multisensor vehicle-mounted teleoperated mine detector with data fusion

John McFee, Victor Aitken, Robert Chesney, Yogadhish Das, Kevin Russell

Proceedings Volume 3392, (1998) https://doi.org/10.1117/12.324158

KEYWORDS: Sensors, Mining, Data fusion, Land mines, Target detection, Metals, Detection and tracking algorithms, General packet radio service, Electromagnetic coupling, Vehicle control

Read Abstract +