This image shows a concrete parking garage deck that has experienced damage. The impact echo test method can identify where the concrete is sound and where it must be repaired or replaced. We sell Impact Echo systems with Freedom Data PC (FDPC) and NDE 360 data platforms, as well as an economical Concrete Thickness Gauge (CTG) that is used with a Windows tablet. Contact us to learn how you can avoid situations like this.
Today we will discuss collecting and processing electromagnetic data with the portable UG12. The UG12 is one of the most reliable electromagnetic induction systems in the market that can work on both passive and active modes. On top of that, its price range makes it a favorite to many archaeologists, geophysicists, and geologists.
Horizontal measuring method:
The main application area for measurements is the horizontal method. Both antennas can be individually controlled. You can decide between automatic and manual measuring point recording. In general, the automatic measuring point recording for survey measurements is chosen when we deal with good terrains. The selected step speed and step distance must remain the same for the entire survey area.
Vertical measuring method:
This method is used for smaller areas and when we require high resolution for small target structures. The measurement is done based on a grid keeping as straight as possible profiles. The profiles are either always unidirectional or meandering. With the meander-shaped measuring fixture, the running direction is changed by 180 degrees for every other profile.
Displaying Data in real-time:
Spectrum (frequency analysis):
All receivable locally Frequencies are shown in a dynamic display in percent as well as in a waterfall display as a different bright bar. The tool can be used locally to determine the frequencies that can be received there and to overwrite up to seven previously-stored frequencies with "change and save frequency".
Without storing the measured data, anomalies and suspected areas can be determined by "irregularly moving the measuring surface" with "plot".
The actual measurement recording is done with the subprogram "survey". During the measurement recording, the individual measuring points are displayed color-coded in real-time.
You can compare all 7 frequencies, a comparative advantage to other equipment in the market since you can save time in the processing.
The software allows interpretation of the data in 2D and 3D view, modeling, documenting, and printing. After processing the data these can be exported to programs that can process ASCII files, such as the Surfer from Golden Software.
The example below shows anomalies with high conductivity. The color assignment, the graphic view as well as the language, can be freely selected by the user. With a double click in the graph, you can get detailed information for each measured profile in the upper window single profile.
The main window shows the same anomalies. In the 2D view detailed information, such as X / Y coordinates, relative conductivity, and the approximate depth of the anomaly can be determined.