Sensors & Software Conquest Series, Manual

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4-Principles of Operation Conquest
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4.3 Lines Scans Running Parallel to Targets
Moving parallel to (or directly on top of) the subsurface feature (Figure 4-7) results in a constant
flat line in the data image (Figure 4-9). Other features such as layers and the bottom of concrete
also appear as flat surfaces.
Figure 4-7:The arrow represents the path of the sensor, running on top of a rebar or conduit.
Figure 4-8:
Figure 4-9:Data image of a hyperbolas produced by a line scan crossing a rebar perpendicularly. The
image also shows flat lines generated by running the sensor parallel along the top of a rebar and the bot-
tom of concrete. Ensure that the Filter option is OFF or flat-lying features are removed from the image.
Be aware that Conquest has the option of applying a background subtraction filter to the data to
remove flat-lying features in the data image. The filter option is available on the Color button in
Line Scan, Grid Scan (see
Figure 5-3 ) or Slice View. The filter is used to enhance the hyperbolas
from targets like rebar so if your interest is a flat-lying feature like the bottom of concrete, make
sure that the Filter is OFF.
Bottom of
Concrete
Top of Rebar