CONCRETE CRACK MEASUREMENT TELESCOPE FOR SUPERVISION BY CARVING EXPANDED SCALE IN CONVEX LENS AND STICKING HEADLIGHT

摘要

PURPOSE: A concrete crack measurement telescope is provided to easily measure cracks of a concrete without a spatial limit by sticking a headlight in front of the telescope and by expanding and carving a scale of a ruler in a convex lens. CONSTITUTION: A scale of a ruler for a crack measurement is carved in a convex lens(1). The scale of the ruler is larger than a scale of a standard ruler according to a magnification of a telescope(4). A headlight(2) including a battery is combined in the tip of the telescope. The headlight is separated in a screw type. A measuring tape(3) is installed in the end of a handle through a connection hook. Thereby, equipment is easily inspected in a dark place and the precise inspection such as a crack measurement of a concrete is easily performed.