LONG-RANGE MAGNETOSTRICTIVE ULTRASONIC GUIDED WAVE SCANNER SYSTEM AND METHOD

摘要

A system for non-destructive inspection of a structure includes a magnetostrictive pulser coil and a ferromagnetic strip. The ferromagnetic strip is coupled to the structure adjacent to the pulser coil. A scanner receiver probe is located adjacent to the ferromagnetic strip. The probe includes a probe body, a position encoder, and a magnetostrictive partial loading receiver coil. A magnet applies a biasing magnetic field to the ferromagnetic strip. A pulser system generates a time-varying current in the pulser coil to induce a time-varying magnetization in the ferromagnetic strip to generate guided wave energy in the structure. The probe detects reflected guided wave energy as the probe is moved around the circumference of the structure. A processor controls the pulser system, records guided wave reflections, and process the guided wave and probe position data to generate a one-dimensional image or a two-dimensional image of anomalies in said structure.

主权项

1. A system for non-destructive inspection of a structure, comprising:
at least one magnetostrictive pulser coil; at least one ferromagnetic strip configured to be coupled to said structure, wherein said at least one ferromagnetic strip is configured to be located adjacent to said at least one magnetostrictive pulser coil; a scanner receiver probe comprising a probe body, a position encoder, and at least one magnetostrictive partial loading receiver coil, wherein the scanner receiver probe is configured to be located adjacent to at least one ferromagnetic strip; at least one magnet for applying a biasing magnetic field to said at least one ferromagnetic strip; an electronic pulser system configured to generate a time-varying current in said at least one magnetostrictive pulser coil to induce a time-varying magnetization in said at least one ferromagnetic strip in the presence of the biasing magnetic field to generate guided wave energy in said structure; at least one wheel configured to move said partial loading receiver probe around the circumference of said structure along said ferromagnetic strip, wherein said scanner receiver probe is configured to detect reflected guided wave energy as said scanner receiver probe is moved around the circumference of said structure; and a processor configured to
control said electronic pulser system;record guided wave reflections detected by said scanner receiver probe; andprocess said guided wave reflections and said scanner receiver probe position data to generate at least one of a one-dimensional image and a two-dimensional image of anomalies in said structure.