Electrical Impedance Tomography
Neptec's EIT technology provides a threat detection solution for land and littoral zone environments. Both conductive and non-conductive buried bodies can be detected, including unexploded ordnance, land mines, and other threats.
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EIT detects buried objects by constructing a 3D conductivity profile of the soil underneath the instrument. An array of electrodes is used to inject low-current stimulation into the ground and measure resulting transfer impedances. An inverse ground model calculation is then performed to compute the conductivity profile that generated the observed measurements. Anomalies in the conductivity profile indicate conductive or non-conductive bodies hidden underground, providing a threat detection tool for both plastic and metal explosives.
The ability of Neptec's EIT technology to detect non-metallic explosives sets it apart from other threat detection methods such as traditional metal detectors. All-plastic explosives are increasingly prevalent in threatening environments, and EIT offers a single sensor capable of detecting both plastic and traditional metal land mines.
Unlike other sensing modalities Neptec's EIT system operates equally well in water and on land, making it a highly effective tool in beach landing zones and other aqueous environments. Direct electrode contact with the sea bed is not required for imaging of the underlying region; fast and reliable detection is achievable with the instrument close to the sea floor.
