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No. Data collection on GS8000 is triggered by wheel movement. If you do not move the radar, then no data collection is happening. The wheel is...
No. Data collection on GS8000 is triggered by wheel movement. If you do not move the radar, then no data collection is happening. The wheel is acting also as an odometer, giving local coordinates on the x-axis direction.
With a frequency of GPR, normally the the middle frequency of a pulsed GPR system is meant. The best frequency depends on the specific application...
With a frequency of GPR, normally the the middle frequency of a pulsed GPR system is meant. The best frequency depends on the specific application and the depth of the target being investigated. Typically, GPR systems operate in a frequency range between 10 MHz to 2.6 GHz.
Higher frequency antennas (1-2 GHz) are generally used for shallow depth investigations (up to a few meters), such as detecting rebar in concrete structures or utility pipes in pavement. Lower frequency antennas (50-500 MHz) are used for deeper investigations (up to tens of meters), such as imaging geological structures or buried archaeological features.
However, the choice of frequency is a trade-off between depth penetration and resolution. Lower frequencies can penetrate deeper but have lower resolution, while higher frequencies can provide higher resolution but have shallower penetration depth.
Screening Eagle’s Stepped Frequency Continuous Wave (SFCW) GPRs do not face this frequency dilemma. Stepped frequency continuous wave (SFCW) can broadcast an ultra wide-band range of modulated frequencies ranging from below 500 MHz to well over 3500 MHz. The combination of all frequency response enables a detection of objects from shallow to deep depth in one scan. However, for shallow depth investigation a GP sensor offers the best resolution. Whereas for deeper penetration, a Proceq GS8000 subsurface GPR is needed.
The most typical data collection is when the Tx-Rx pair (Transmitter and Receiver of the GPR antenna) moves in parallel with the line that you are...
The most typical data collection is when the Tx-Rx pair (Transmitter and Receiver of the GPR antenna) moves in parallel with the line that you are collecting data. When the antenna is in its standard position, metallic targets will appear brighter than non-metallic ones. That leads to radargrams with very bright metallic targets and very weak non-metallic targets. Sometimes, the reflection from the metallic targets can disguise completely any reflection from nonmetallic ones or can hide the bottom of the concrete slab. This way of data collection is often called in-line data collection.
In order to see non-metallic targets clearer, an antenna can be reversed by 90 degrees to the line (make diagram). Now, the scan is more sensitive to the non-metallic targets. Metallic targets will appear less bright than during the in-line data collection. Concrete slab bottom will also become clearly visible. This way of data collection is called cross-polarized data collection or cross-polarization.
Typically, GPR exports data in the SEG-Y format. This can be easily converted to other formats like .xls, .dxf or .kml if needed for further...
Typically, GPR exports data in the SEG-Y format. This can be easily converted to other formats like .xls, .dxf or .kml if needed for further visualization of data.
No. Data collection on GPR systems (GPx and GSx) is triggered by wheel movement. If you do not move the radar, then no data collection is...
No. Data collection on GPR systems (GPx and GSx) is triggered by wheel movement. If you do not move the radar, then no data collection is happening. The wheel is acting also as an odometer, giving local coordinates on the x-axis direction.
Dielectric, also known as relative permittivity, is a unitless value that determines how fast EM waves travel in a specific medium. Its values...
Dielectric, also known as relative permittivity, is a unitless value that determines how fast EM waves travel in a specific medium. Its values range from 1 to 81, with lower values being better for GPR. Air, which is the best medium for radar waves has a value of 1 and seawater has a value of 81. Metal objects have infinite dielectric.
Both. GPR can be used as a standalone unit if you work on specific applications and you are happy with a limited set of feedback and information....
Both. GPR can be used as a standalone unit if you work on specific applications and you are happy with a limited set of feedback and information. However, it is not a tool for every job you may have onsite. In concrete applications, GPR can be used in combination with Ultrasound Tomography (Pundit Array: https://bit.ly/3cBBeTE) and Eddy Current Rebar locators (Profometer: https://bit.ly/39B0QhJ) to get a comprehensive approach.
Proceq is now part of Screening Eagle Technologies. Screening Eagle is a merger of Dreamlab, a Singapore-based software and robotics company and Proceq, a Swiss-based NDT company with a 65+ year heritage as a market leader in portable sensors. Together, we protect the built world with software, sensors and data.
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