Sensors & Software Conquest Series, Manual

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4-Principles of Operation Conquest
10
4.1 Line Scans Crossing Targets Perpendicularly
Conquest detects rebar and conduits which are generally rod-like in shape. A line scan over a
localized feature such as a pipe or bar crossed perpendicularly generates a hyperbola (inverted
V) as sketched in Figure 4-4.
The sensor should cross perpendicular to the long axis of the feature, i.e. we must cross the
feature at 90
o
(Figure 4-3).
Figure 4-3:The arrow represents the path of the sensor, crossing the rebar or conduit at 90
o
.
When the sensor crosses a target, we get the typical “hyperbolic” or inverted “V” response from
the target, as shown in Figure 4-4. A real data image is shown in Figure 4-5.
Figure 4-4:Crossing a target perpendicularly produces an inverted “V” or hyperbola in the cross-section
image.