Abstract: A novel video inspection method for an interior surface of a small diameter pipe may include the steps of advancing a videoscope through the pipe of known size while acquiring raw images therefrom; estimating the video camera pose for at least some of the raw images; sequentially building a pipe point cloud, a mesh, and a 3D textured model of the interior surface of the pipe from the raw images with adjustments for video camera poses; unwrapping the raw images using camera poses and the pipe point cloud to create unwrapped images of the interior surface of the pipe; and creating a panoramic image of the interior surface of the pipe by stitching the unwrapped images together. The method improves on a conventional Structure-from-Motion technique and allows enhanced sharpness, reduced artifacts, and improved uniformity of lighting as a result of reduced model noise and removal of outliers. The method may be implemented with conventional video borescopes by postprocessing raw images using proprietary software.

Abstract: Systems and methods for logging acoustic incidents. An exemplary system includes a transducer configured to receive an electrical signal from an electrical signal source and produce a corresponding acoustic signal, a recording system operable to record the electrical signal from the electrical signal source, and an incident estimation and control system coupled to the recording system to estimate an acoustic incident and to instruct the recording system to record the electrical signal that is producing the acoustic incident. The system can replay the recorded electrical signal through the same transducer that was in use at the time of the acoustic incident, to exactly reproduce the sound that occurred.

Abstract: Systems and methods for logging acoustic incidents. An exemplary system includes a transducer configured to receive an electrical signal from an electrical signal source and produce a corresponding acoustic signal, a recording system operable to record the electrical signal from the electrical signal source, and an incident estimation and control system coupled to the recording system to estimate an acoustic incident and to instruct the recording system to record the electrical signal that is producing the acoustic incident. The system can replay the recorded electrical signal through the same transducer that was in use at the time of the acoustic incident, to exactly reproduce the sound that occurred.