This paper describes the development and successful applications of a new, robust CCTV, 3D LIDAR and sonar basedrnpipe inspection system that gathers quantitative data for critical underground pipe condition assessment. The systemrncan be deployed on an autonomous robot (ROV) or on a float and it produces accurate cross-sectional analysisrnincluding corrosion, ovality and sediment volume. This ability is increasingly critical in assessing the condition ofrnlarge diameter pipes with high level of flow. The system employs a time of flight LIDAR that is accurate to 1/16th ofrnan inch.rnResults from recent projects are discussed in detail. Two wood-stave pipes (24 inch and 40 inch respectively) withrnhigh degree of deformation were inspected prior to a CIPP lining project. The LIDAR data provided accurate ovalityrnand deformation measurements that was critical for designing a structural liner to rehabilitate these pipes.rnThe 48-inch Mopac Road Interceptor in FortWorth, Texas is a critical interceptor in the city’s sewer system. The floatrnbased CCTV, LIDAR and sonar system revealed critical quantitative information on deformations and sedimentrnvolume that would aid the owners in deciding the most appropriate rehabilitation strategy for the interceptor.rnWith limited available funding and budget constraints becoming more prevalent, timing of rehabilitation and overallrnintelligent asset management is more critical than ever. Advanced pipe condition assessment technologies, such asrnthe newly developed multi sensor system offer a cost-effective, non-destructive method of condition assessment tornhelp refine the estimated remaining life of a pipe, accurately determine pipe degradation, as well as provide a basisrnfor improved cost allocation and timing of rehabilitation efforts.
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