Envirosight inspection pipe crawlers feature laser and sonar profiling tools

New laser and sonar profiling tools from Envirosight integrate with ROVVER and SuperVision inspection crawlers, allowing them to analyze pipe for indications of deformation, corrosion, debris accumulation, and improper liner installation. The laser profiler works above flow lines, and the sonar profiler works below. Each can be used individually, or both simultaneously. The profilers come with software capable of generating a multitude of reports, each presenting a wealth of data in an easy-to-understand format.

The profiling hardware consists of a probe which attaches in seconds to the head of a ROVVER or SuperVision camera. No modification of the crawler is required. The probe is fitted with a laser or sonar profiler, or both. Together with the included profiling software, the probe measures the diameter and concentricity of pipe 4–160 inches in diameter, performing up to 250,000 measurements per minute with ±1% accuracy.

Using machine vision, the profiler software extracts the laser profile from the camera’s video feed. It combines this information with sonar data (where available and necessary) to analyze the entire circumference of the pipe at rapid intervals. This data is aggregated over the entire length of the pipe, and can be used to generate standard reports with statistical analyses, as well as an onscreen 2D- or 3D-representation of the pipe’s interior wall.

Standard reports are available to track a pipe’s true diameter, ovality (per ASTM 1216), capacity, x/y diameter and maximum diameter. The software can generate a 3D representation of the pipe, with variations in the pipe wall shown in sharp relief for easy visual analysis. A 2D representation is available, as well, where the pipe interior is flattened into a chart whose y axis represents pipe diameter, whose x axis represents pipe length, and whose color represents deviation from concentricity or severity of corrosion. For engineers, additional reports are available addressing corrosion, structural cracking, debris, and consistency of relining (before-and-after).

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