LINEAR MEMBER DIAGNOSTIC SYSTEM AND DIAGNOSTIC METHOD

摘要

PROBLEM TO BE SOLVED: To diagnose a change in sectional shape of a linear member covered with a nonmagnetic material in a structure caused by the breaking or the like of the linear member.SOLUTION: When a change in sectional shape of a linear member covered with a nonmagnetic material in a structure is diagnosed, a plurality of magnetizable linear members arranged on a plane in one direction is magnetized along the longitudinal direction of the linear member. In a magnetic field formed by the magnetized linear member, at least a magnetic field component on the surface of the structure in a direction orthogonal to the arrangement surface of the linear member is measured by a magnetic sensor. The change in sectional shape of the linear member is measured based on a magnetic field distribution obtained by using the measured magnetic field component parallel to the arrangement surface of the linear members and along a width direction orthogonal to the longitudinal direction of the linear members.SELECTED DRAWING: Figure 1