
Bridge Module
Bridge Module requires Road Doctor™ 3D GPR Module to Work. And it is available for Road Doctor™ PRO, Geo Doctor and Road Doctor™ GPR.
Bridge Module gives you a possibility to calculate Frequency and Amplitude parameters in specified time slice windows. The time slice window can be set in the given fixed time interval or in relation to the interpreted layers. This makes possible for instance to pick up the pavement bottom or iron enforcement level for reference level. The program can also split the selected time interval to smaller slices, which can overlap.
In the amplitude analysis, the program calculates the absolute amplitude average from the given time interval. This value is outputted as a raw value or as dB:s in relation to given amplitude reference level.
In the frequency analysis, the program calculates the Fourier spectrum of the data in the given time window. From the frequency spectrum the program generates parameters which describe the frequency response of the material, which can be used to estimate bridge condition.
The program saves and prints the results directly in to tables and links the results in to the project tree and asks for the display parameters. The data is shown as a surface image on the screen.

Data Output example

Click here to view larger image
Sample data output of the Bridge Module. The sub windows in rainbow colors were created using the bridge module. Upper one is the relation of the frequency content at higher frequencies compared to lower frequencies. The lower sub-window is the absolute amplitude average from the same time slice. The violet areas have the highest attenuation.
