We manufacture highly effective magnetic sensors (fluxgate
and induction coil), low-frequency electromagnetic sensors, and various
electromagnetic antennas. As well, we have developed a system to acquire,
process, and analyze the data from those sensors and antennas.
This system can detect, track, and characterize targets with
magnetic and low-frequency electromagnetic signatures. It can provide unattended
ground sensor project for targets like tanks, trucks, scud
launchers, and rifles. It can also assist UAV-based systems
for underground facility detection. It detects the magnetic
field perturbation produced by ferrous objects; it can detect
a rifle at 70 feet and a tank at several hundred. It can detect
the low-frequency field perturbation produced by underground
conductors. And it can detect emissions from various targets.
We have developed several system components and demonstrated
an integrated, real-time system. Some specific modules are
explained in further detail.
Fluxgate Magnetometer
We have developed extremely sensitive fluxgate magnetometers.
These provide room temperature operation and sense a few
PT at 1Hz. They can detect a rifle at 70 feet and a hand
grenade at 3 feet. These tri-axial sensors can be used is
conjunction with our signal acquisition and analysis system.
They can detect, track, and classify various non-cooperative
targets. Other applications exist in geophysical exploration,
surveillance, and underwater exploration.
Low-Frequency Electromagnetic Sensors
The fluxgate sensors measure the magnetic field at a frequency
range from dc to a few tens of Hz. For frequencies above
tens of Hz, induction coils provide the best sensitivity.
We have developed induction coils with sensitivity better
than FT. These are the most sensitive induction coils in
the world and can operate from 1 MHz to hundreds of KHz.
Combining fluxgate and induction coils provides the ideal
sensor suit for complete electromagnetic spectral characterization, from
dc to hundreds of KHz. We have developed various units with
different sizes and responses.
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