EXPLORATION MEASUREMENT MEASURE OF UNDERGROUND CONDUIT LINE

摘要

PURPOSE: An underground conduit measurement method is provided to simply and accurately measure the curvature, an inside diameter, a position, and a damaged state of an underground conduit and to save data in real time. CONSTITUTION: An underground conduit measurement method is as follows. A light emitting sensor is installed in the inner central part of a synthesis measuring device and the infrared rays being emitted from the light emitting sensor and being reflected are measured by a plurality of light receiving sensors installed in the circumference of the synthesis measuring device so that distances per each sensor are measured. The light emitting sensors are installed along the outer circumference of a circular shape of the synthesis measuring device at an equal interval. The measured distances per each light receiving sensor are calculated by a program for automatically converting an inside diameter so that the inside diameter is accurately and precisely obtained.