Landmine Detection

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$119,901.00
Award Year:
2004
Program:
SBIR
Phase:
Phase I
Contract:
W909MY-04-C-0017
Agency Tracking Number:
A032-2557
Solicitation Year:
2003
Solicitation Topic Code:
A03-107
Solicitation Number:
2003.2
Small Business Information
COHERENT TECHNOLOGIES, INC.
135 S. Taylor Avenue, Louisville, CO, 80027
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
149375479
Principal Investigator:
Philip Gatt
Research Scientist, Princ
(303) 604-2000
Phil.Gatt@ctilidar.com
Business Contact:
Timothy Carrig
Director of Research & De
(303) 604-2000
Tim.Carrig@ctilidar.com
Research Institution:
n/a
Abstract
Buried landmines produce distinct seismic surface vibrations when excited by acoustic or pressure energy. Many approaches to this problem are being investigated. To date the biggest problem is the slow demining rate due to dwell time requirements. The platform speed is governed by the necessary dwell time (100 ms for 10 Hz resolution) and the number of simultaneous measurements. To support a 1 m/s platform velocity with a 3 m wide swath and 2 cm resolution, a total of 5x150 beams (pixels) is required. Faster platform velocities are conceivable through a larger array. In principle a 25x150 array would support a 5 m/s platform velocity. CTI proposes to develop a novel scannerless acoustic landmine detection system using a coherent detection receiver to detect these minute surface vibrations on a moving platform. At present CTI is carrying two conceptual designs to be down-selected in Phase I. The first concept is a multi-channel conventional bistatic CW laser vibrometer. This multi-channel/beam lidar increases the demining rate through parallel beams. The second and more novel concept is a baseband imaging interferometer, which utilizes a low-noise high-speed CCD camera to image an interfereogram, thereby significantly reducing hardware complexity. Speckle mitigation is achieved through the a series of diversity techniques, which include some combination of the following : dual polarization receiver, multiple receive apertures for each transmit beam, multiple wavelengths, and temporal averaging. The sensor also employs platform motion sensors and advanced signal processing algorithms to optimally process the speckle diversity and mitigate platform motion induced noise. A post processor filters the data using knowledge of the mine-signatures to produce the mine detection signal.

* information listed above is at the time of submission.

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