Definition - What does Crawler mean?
A crawler, in the context of trenchless technology, is defined as a type of transporter that is used to carry out inspections in pipelines where it is not possible to send humans to do the job. These transporters are self-propelled and are mounted with cameras on either wheels or tracks for easy maneuverability. In trenchless technology, crawlers play an important role by helping to detect leaks and damage to underground pipes. The modern robotic crawler can carry sensors and tools through wastewater and industrial pipes even when submerged, and can travel up to 2.9 km from the access point.
Trenchlesspedia explains Crawler
A crawler has steerable wheels which allow it to go far and move around obstacles with ease. An operator remotely operates the crawler while inspecting the footage from the camera which enables him to adjust speed, inspect a probable damage site or maneuver over or around obstructions. The operator can adjust the camera's tilt and can zoom in on doubtful areas to access damage. As the crawler moves down a pipeline, the footage taken can be examined and analyzed frame by frame. Each frame can also be digitally extracted and unfolded into a rectangle which when placed side by side shows the entire length of the pipe. Robotic crawlers are easy to use and give detailed inspection results that can be used to carry out repair work only where needed instead of having to dig up an entire section of pipeline.