NON-DESTRUCTIVE INSPECTION MEASUREMENT SYSTEM AND NON-DESTRUCTIVE INSPECTION MEASUREMENT METHOD

To provide a non-destructive inspection measurement system capable of measuring dimensions of a subject body.SOLUTION: A non-destructive inspection measurement system 10 includes: an excitation coil 113 that excites a subject body; a detection coil 121 that outputs a magnetic field change produced in the subject body; and a measurement device 3 that applies a sine wave signal or a composite signal of a different frequency to the exciting coil 113, detects a voltage from the detection coil 121, and measures dimensions t2 of the subject body. The measurement device comprises: a calibration gradient calculation unit 310 that measures a voltage from the detection coil 121 for each dimension t2 for a plurality of portions of the subject body whose dimensions t2 are known and different, and calculates a slope of a straight line connecting at least two measurements on an amplitude ratio-phase difference plane from the amplitude ratio and phase difference between the voltage and a reference voltage; a calibration unit that constructs simultaneous equations from the relation with values based on the gradient calculated for the dimension t2 for each of the plurality of dimensions t2; and an estimation unit that estimates the dimension t2 at the time of measuring the dimension t2.SELECTED DRAWING: Figure 1 【課題】被検体本体の寸法を測定可能な、非破壊検査測定システムを提供する。【解決手段】非破壊検査測定システム１０は、被検体本体を励磁する励磁コイル１１３と、前記被検体本体に生じる磁界変化を出力する検出コイル１２１と、前記励磁コイル１１３に正弦波信号、または異なる周波数の合成信号を印加し、前記検出コイル１２１からの電圧を検出し、前記被検体本体の寸法ｔ２を測定する測定装置３とを備える。前記被検体本体の前記寸法ｔ２が既知で異なる複数の部分に対し、前記寸法ｔ２ごとに前記検出コイル１２１からの電圧を測定してこれと基準電圧との振幅比及び位相差とから、振幅比−位相差平面上での少なくとも２つの測定結果を結ぶ直線の勾配を計算する較正時勾配計算部３１０と、複数の前記寸法ｔ２ごとの、当該寸法ｔ２に対して計算された前記勾配を基にした値との関係から、連立方程式を構築し、前記寸法ｔ２の測定時に前記寸法ｔ２を推定する。【選択図】図１