AXIAL FORCE MEASURING APPARATUS, AXIAL FORCE MEASURING METHOD, ULTRASONIC INSPECTION APPARATUS, ULTRASONIC INSPECTION METHOD AND VERTICAL PROBE FIXTURE USED FOR THE SAME

PROBLEM TO BE SOLVED: To provide an axial force measuring apparatus, an axial force measuring method, an ultrasonic inspection apparatus, an ultrasonic inspection method and a vertical probe fixture used therefor in which interference frequency can be accurately measured despite a simple configuration, and conditions of a test piece including an axial force can be measured accurately more than ever.SOLUTION: A vertical probe fixture 10 matches a relative position and a relative attitude when sending/receiving a burst wave twice including sending/receiving a burst wave for creating calibration data of a vertical probe 2 for a long member 100 or sending/receiving a burst wave in an unloaded condition of the long member 100, and sending/receiving a burst wave in a loaded condition of the long member 100. A signal processing part 3 makes the burst wave incident while changing an oscillation frequency, and a signal intensity measurement part 36a measures signal intensities for respective oscillation frequencies. The maximum interference frequency which generates the maximum signal intensity within a predetermined interference frequency range is obtained from the measured signal intensities for respective oscillation frequencies, and an axial force of the long member 100 is measured based on the obtained frequency.SELECTED DRAWING: Figure 1 【課題】 簡素な構成でありながら精度よく干渉周波数を測定し、軸力等の試験体の状態をより正確に測定可能な軸力測定装置、軸力測定方法、超音波検査装置、超音波検査方法及びこれに用いる垂直探触子固定治具を提供すること。【解決手段】 垂直探触子固定治具１０は、長尺部材１００に対する垂直探触子２の校正データを作成する際のバースト波の送受信時又は長尺部材１００の無負荷状態でのバースト波の送受信時と、長尺部材１００の負荷状態におけるバースト波の送受信時の２回で、相対位置及び相対姿勢を一致させる。信号処理部３は、バースト波を発振周波数を変化させながら入射させて信号強度測定部３６ａにより発振周波数毎に信号強度を測定する。測定した発振周波数毎の信号強度から所定の干渉周波数範囲内で最大の信号強度となる極大干渉周波数を求め、これに基づいて長尺部材１００の軸力を測定する。【選択図】 図１