Nondestructive Testing to Identify Delaminations Between HMA Layers: Phase III–Develop User Guidelines (2014)

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IDS RIS Hi-Pave System: A Dedicated Solution for the Survey of Pavements (prepared by IDS, February 2013) RIS Hi-Pave is a ground-penetrating radar solution designed for high-speed Road Assessment Surveys. The system is able to operate with several antennas at the same time, providing a complete assessment of road conditions, such as pavement thickness measurement; surface, base and sub-base road course assessment; detection of cavities and voids; location of cracks; airport runway condition assessment. Hi-Pave system is based on a multi-channel, high performance radar technology. The architecture of this system enables the following features: • High Speed: the system using only one antenna can achieve up to 180 mph; • Multichannel: up to 8 antennas can be recorded simultaneously with one single control unit; • Chain architecture: antennas are added to the system in a “chain” connection in “plug and play” mode; • Data quality: antenna design allows it to record very clean signals and a proprietary processing algorithm permits an efficient removal of background noise; and • Additional features: integrated video-camera, GPS, data exportation. RIS Hi-Pave system composition. B33

Hi-Pave Configuration and Mounting The RIS Hi-Pave configuration can be configured with horn antennas with frequency values of 1 GHz and 2 GHz mounted on the vehicle; this solution is particularly suitable when an easy-to-remove installation is required. It is also possible to connect additional ground-coupled antenna (standard TR antenna) for deeper investigation. In this specific configuration the system will be provided with 8 2GHz antennas. The Horn antennas will be connected in chain with only one cable connecting the DAD with Horn antennas, avoiding the use of many cables and additional control units. The Horn antennas are light (6.5 kg–14 lb), and a mechanical frame must be adapted in order to host all the antennas. The off-the-shelf solution from IDS provides a mechanical kit able to bring 2 Horn antennas in parallel and can be adapted to store more antennas. The maximum survey speed with 8 antennas due to the proprietary IDS chain connection technology is reported in the table below: Survey speed with 8 antennas Number of DAD MCH Fast-Wave (with 512 samples and 2 scans per foot ) (with 512 samples and 5 scans per foot) 1 58.4 mph 29.2 mph RIS Hi-Pave with two-antenna configuration. B34