A High Speed Towed Magnetic Array for In-Road Detection of Improvised Explosive Devices Employing Optimized Magnetic Map Differencing

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$69,775.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
W15QKN-08-C-0061
Award Id:
81574
Agency Tracking Number:
A072-169-0271
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
605 Mercury Street, Raleigh, NC, 27603
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
148040447
Principal Investigator:
I.Won
Principal Investigator
(919) 839-8515
ijwon@geophex.com
Business Contact:
LyndaRedner
Administrator
(919) 839-8515
redner@geophex.com
Research Institute:
n/a
Abstract
This proposal describes an active electromagnetic induction (EMI) sensor array that can operate at a sampling rate of 750Hz, corresponding to 1.4 inches (3.5 cm) in distance at a moving speed of 60 mph. At low frequencies (below a few kHz), an EMI sensor is basically a magnetometer that responds to susceptibility targets (i.e., ferrous objects). The main difference is that, while a magnetometer uses the earth's field as the illuminating source, an EM sensor emits its own time-varying magnetic field and, thus, has the name electro-magnetometer. An electro-magnetometer acts like a magnetometer at low frequencies but also acts like a metal detector at higher frequencies, responding to conductive targets and, therefore, can also detect nonferrous objects (aluminum, copper, brass, etc.) that a magnetometer misses. The proposed electro-magnetometer will have a bandwidth of 750 Hz - 96 kHz, for which it will behave like a magnetometer below a few kHz and a metal detector above. In this proposal, we describe our new electro-magnetometer technology that can meet all requirements for this topic: it will provide a high sampling rate (750 Hz), can have an arbitrarily wide swath, and can detect both ferrous and nonferrous targets down to 3 feet in depth for typical metal objects. The proposed sensor is based on successful commercial EMI sensors manufactured by Geophex for detecting and discriminating UXO/landmines. The primary difference will be the new high sampling rate to meet the requirements of this SBIR topic.

* information listed above is at the time of submission.

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