Band of Solenoid Coil for Measuring Tensile Stress and Section Loss in Bar and Rapping Method of Solenoid Coin outside of Bar using such Band

摘要

The present invention relates to a band device with a solenoid coil to measure stress changes and section loss of a wire rod, and a method to form a solenoid coil on the outside of a wire rod using the same. According to the present invention, the band device comprises: a band substrate installed to surround a tension member, such as a tendon, cable, etc., and a linear member (wire rod), such as rebar, steel rod, cable, etc., for tensile reinforcement; and a plurality of coil lines disposed in parallel with each other at identical intervals on the outer surface of the band substrate and each having a corresponding end point formed on a transversal side surface of the band substrate. Accordingly, when the outside of a wire rod is enclosed with the band substrate, the corresponding end points are electrically connected so that the coil wires are coiled into a continuous spiral shape to form a solenoid coil enabling measurement of changes in tensile force as a sectional force generated on a cross section of the wire rod, a section loss of the wire rod, etc.