|
|
|
RDP Software
The RDP PavePro is a
software program developed to analyze IRIS GPR pavement data. PavePro
determines pavement layer thickness, detects voids, subsurface moisture
and deteriorated concrete, and can operate independently in an automatic
mode or with user assistance. PavePro software employs a
combination of sophisticated statistical analysis, pattern recognition and
expert-system based algorithms to achieve its performance in locating and
tracking subsurface layers. Using statistical pavement data, a special
histogram based, method was developed, representing a compromise between
long and short term variations in signal strength and location, to
identify valid signals and layers. A matched-filter based technique was
also developed to differentiate pavement interface signals relative to
clutter, and an expert-system based scheme is employed to validate the
detection of subsurface layers. These advanced signal processing features
provide improved pavement layer thickness measurement as compared to
conventional techniques and permit users who have relatively little
experienced in GPR signal analysis to effectively utilize GPR technology.
All measurements are stored in a formatted ASCII files which can be
exported to spread sheet or data base programs, printed as a numerical
listings or displayed graphically as a continuous 2-D or 3-D scrolling
layer profile. For expert users, a semi-automatic thickness processing
mode is also available that permits dynamic user identification and
tracking of multiple layer interface signals, designation of signal
polarities and processing parameters such as dielectric constant, layer
attenuation and signal transit time. The semi-automatic processing
software is also used to detect voids and high moisture content beneath
pavements by providing continuous measurement of signal polarity and
reflectivity based upon the location of user operated range gates.
Processed data can then be presented in a color topographical, plan-view
mapping of the pavement structure.
A
ColorPro plot showing GPR pavement data, in a gray-scale display format.
The pavement surface and subsurface interface signals are marked in red
color for depth measurements.
|
|
|
