��������-�������

HOMEPAGE

ABOUT THE METHOD

SOFTWARE FEATURES

BENEFITS SOFTWARE

DOWNLOAD

WHAT'S NEW

 

Examples of Processing Results:

Hidden Defects in Concrete

Pipe Detection

Pile Foundation Grillage

Engineering Geology

Railroads

Building Control

Municipal Engineering

Non-destructive Testing

Air Voids in the Soil

Illegal Tie-in Into Oil Pipeline

Archeology

Relief Map

3D Processing

Certificate:

Certificate of state registration program GEORADAR-EXPERT

Publications:

��������� 4 2010 �������

��� 2011

������ � ������ ������� �6 2015 ��� 73-78

������� ��� ���

���� ����. ������ 56, 2015 �.


 

SOFTWARE FEATURES OF GEORADAR-EXPERT

As a result of the automated analysis of the backscattering electromagnetic field (BSEF), it is possible to obtain sections of the following attributes:

  • Re(permittivity) - Real part of the complex relative permittivity;
  • Im(permittivity) - Imaginary part of the complex relative permittivity;
  • Mod(permittivity) - Modulus of the complex relative permittivity;
  • Frequency - The central frequency of the spectrum of diffracted reflection signals;
  • Signal bandwidth - The bandwidth of the spectrum of diffracted reflection signals;
  • Irregularity spectrum - Irregularity of spectrum of diffracted reflection signals;
  • Spectral flatness;
  • Q-factor - The ratio of the central frequency of the signals spectrum to its bandwidth;
  • Loss tangent;
  • Resistivity - The resistivity at the central frequency of the probe pulse of the GPR;
  • Damping rate - Rate of attenuation of the probe pulse of the GPR;
  • Radarogram signalsAmplitudes of signals of GPR profile;
  • Diffraction amplitude - The average amplitude of the diffracted reflection module;
  • Envelope signals - Amplitude of the envelope of signals of the GPR profile;
  • Weight water content;
  • Volumetric water content;

As examples, the figure below shows the section obtained as a result of the analysis of the georadar profile across the lake (left) and the section obtained during the solution of the problem of searching for underground communications (right):

ГЕОРАДАР-ЭКСПЕРТ. Разрез по георадарному профилю через озеро. ГЕОРАДАР-ЭКСПЕРТ. Разрез по профилю нак коммуникациями.

For the rapid assessment of the parameters of the subsurface environment, the program provides a cluster analysis of attributes. It allows the user to visually present the model of the investigated environment and to facilitate the setting of the parameters for creating the section:

ГЕОРАДАР-ЭКСПЕРТ. Результат кластерного анализа.


It is possible to enter a correction for the terrain, loading the altitudes data from the spreadsheet file:

ГЕОРАДАР-ЭКСПЕРТ. Разрез с поправкой за рельеф.

There are various ways to visualize the sections - in the form of smooth color transitions, rectangular segmentation, as isolines with color-filled outlines. It is possible to superimpose a section on a radarogram in the semitransparency mode:

ГЕОРАДАР-ЭКСПЕРТ. Наложение разреза на радарограмму.

The parameters for creating a section can be saved to a file and downloaded from a file. The results of the automated analysis of BSEF can be saved to graphic files, exported to other data formats (in the format GRD of Golden Software Surfer, for example) and assembled to 3D volumes.

For an area georadar survey, it is possible to visualize 3D environment parameters and wavefield attributes for GPR profiles of unequal length and arbitrary orientation.

ГЕОРАДАР-ЭКСПЕРТ. 3D объём.

3D volume can be rotated, cut out segments of volume, control transparency. Transparency can be changed for the entire volume, and for a certain range of values of the attribute, which allows you to observe the shape of one or another anomaly in space.

ГЕОРАДАР-ЭКСПЕРТ. 3D объём с прозрачностью.

The cross-sections of the 3D assembly can be visualized both in the mode of smooth color transitions, and in the form of a contour plot of isolines with a specified value increment:

ГЕОРАДАР-ЭКСПЕРТ. 3D объём. Изолинии.

You can export 2D cross-sections of 3D assemblies for insertion into AutoCAD or a similar program for creating drawings.

If the isoline mode in 3D assembly is used for two-dimensional sections, then for the three-dimensional view it is possible to apply the isosurface mode, ie the surfaces connecting the same attribute values in the volume:

ГЕОРАДАР-ЭКСПЕРТ. 3D объём. Изоповерхности.

ГЕОРАДАР-ЭКСПЕРТ. 3D объём. Изолинии

Along with the automated separation of the investigated layer into layers, the GEORADAR-EXPERT software provides a mode of applying the boundaries of the layers to the profile manually with the following possibilities:

  • Automatic and manual modes of picking the boundaries of layers;
  • Manual adjustment of the permittivity values in the layer, both from a priori data on the subsurface, and based on the results of the analysis of the BSEF;
  • Saving data about the position of the boundaries of layers in a file for subsequent loading of layers and their use;
  • Saving the MS Excel spreadsheet containing the following information for each layer: superface of stratum, subface of stratum, and the thickness of the layer. These data are exported with a user-defined step. The average values for each of the parameters of the layer, as well as the cross-sectional area of the layer, are also stored in this table.

You can obtain graphs and statistics of the spatial distribution of parameters for each value of the section attribute or 3D assembly:

ГЕОРАДАР-ЭКСПЕРТ. Пространственное распределение атрибута разреза.


To effectively manage data visualization, the GEORADAR-EXPERT software implements the creation and editing of already created color schemes, the possibility of saving schemes to a file and loading from a file into the program, controlling brightness, contrast, color saturation, colormap parameters and data visualization thresholds. There is the possibility of automated creation of color schemes based on a random number generator. Several dozens of ready-made color schemes for a wide range of tasks are built into the program.

Along with all of the above, the GEORADAR-EXPERT software contains all the options for digital processing of georadar profiling results that have become traditional in programs for processing georadar data, which serve to suppress interference, detect useful signals, improve detail and resolve the radargram.

As an example, below is the result of the wavelet decomposition of the signals of the georadar profile in order to increase the depth resolution. The figure below shows a fragment of the georadar's profile before the wavelet decomposition (left) and after (right). Under each image the corresponding spectrum of signals is shown. As a result of the wavelet decomposition application, the central frequency of the profile signals (the frequency value with the maximum amplitude Fmax is located under the spectrum frequency scale) has more than doubled, and the reflections from the layer boundaries have become more localized:

ГЕОРАДАР-ЭКСПЕРТ. Пример вейвлет-декомпозиции сигналов радарограммы.

In the GEORADAR-EXPERT realized the possibility of decomposing the matrix of radargram signals into components with the purpose of emphasizing or suppressing waves of similar origin:

ГЕОРАДАР-ЭКСПЕРТ. Разложение матрицы сигналов георадарного профиля.

To remove the noise, it is convenient to apply spatial filtering and replacing the profile traces. Example of a spatial filter operation:

ГЕОРАДАР-ЭКСПЕРТ. Пространственная фильтрация.

An example of the replacement of profile traces (removal of interference from an electrical cable, which can introduce distortions in the process of automated creation of a section based on the analysis of BSEF):

ГЕОРАДАР-ЭКСПЕРТ. Замена трасс профиля.


In addition to digital processing, georadar profiles can be cut at the edges, cut fragments within a profile, merge several profiles into one, split a profile into specified fragments, and change profile parameters.
To optimize the length of the GPR traces and their number in a radargram, the program GEORADAR-EXPERT provides a resampling of signals, with which you can remove redundant information without loss of data quality, thereby reducing the size of the profile file and processing time, which is important for large volumes and short terms of work.

To view details of software features of GEORADAR-EXPERT, download the user manual at this link>>

 

 

© Denisov Roman 2009-2017

  �������@Mail.ru