United States Department of Transportation
i
Automated Path Tracking and Mapping for Economical, Real-Time, and Knowledge-Based Roller Control in Pavement Compaction Operations: Phase I: Algorithm Development
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2020-01-24
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[PDF-1.54 MB]
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Abstract:Compaction is considered as the last and possibly the most important phase in construction of asphalt pavement. It densifies the paving mat and affects the performance properties of the constructed pavement to a great extent. Inspired by recent advances in visual odometry, this research developed a thermal-based technology carrying an infrared camera (IR) for roller path tracking and mapping in the pavement construction process. Especially, a novel calibration method using a special symmetric circular pattern was created for IR camera calibration, and a visual odometry algorithm leveraging computer vision knowledge, i.e., vanishing points and optical flow technique, was developed for roller path tracking and mapping. The technology can provide real-time roller locating and a continuous recording of color-coded plots of the roller path, which may assist operators to control their rolling operations in real time. Initial field experiments were conducted in order to test the performance of the developed algorithm. The visual results demonstrated that the developed technology is a promising alternative to intelligent compaction (IC).
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