SQUID磁束計を用いた非破壊計測システム : 非磁性体ステージと磁気シールド材評価

概要

論文の詳細を見る
A nondestructive evaluation (NDE) system using a highly sensitive magnetic sensor, the SQUID (superconducting quantum interference device) magnetometer is developed. The system is composed of a SQUID magnetometer, a gantry which supports the SQUID dewar, a nonmagnetic rodless cylinder used to drive a stage for scanning a specimen under the SQUID magnetometer and a magnetically shielded room. First, the supply pressure condition for driving the stage at a low, constant speed is determined. Secondly, stainless steel bolts considered to be non magnetic are measured using the system and it is confirmed that the bolts contain a very small amount of magnetic material. Thirdly, the change in the permeability of a permalloy plate due to torque stress is detected using the system. From these results, it is confirmed that the system has a high sensitivity and spatial resolution.
社団法人日本機械学会の論文
1996-10-25