Traffic sensors embedded as in-roadway sensors frequently malfunction due to failure to observe proper installation techniques. Nondestructive evaluation of the installation or maintenance work has the potential to verify correct or incorrect installation procedures. Ground penetrating radar is the technique being investigated for this. The objectives of this research study are to: (1) Verify whether ground penetrating radar has the potential to identify defects in installation and/or maintenance.(2) Establish contacts with organizations that have problems with installations and dialog with them.(3) Identify critical gaps regarding the collection and processing of ground penetrating radar data, and what hardware changes or algorithms might be used to enhance the nondestructive evaluation of ground penetrating radar techniques.(4) Conduct laboratory and field tests of improved hardware and algorithms and conduct field demonstrations.
The key project objective is the detection of wires and cracks in wires and pavement.
By using advanced signal processing techniques and custom radar wavelength handling, it is possible to detect much smaller cracks than is possible with conventional impulse radar.