SolutionsThe measurement probe sensor of the eddy current (100), the excited section (20) with the sensing station (30) with it has possessed. The excited section (20), the main core which forms the cylindrical magnetic substance (21) with the aforementioned main core (21) around lap in order the main coil which is the solenoid coil which the ma it can change in direction (22) with the 1st excited section and each sub core which are included (25) axial direction the aforementioned main core (21) to become same as axial direction, it is arranged around the aforementioned 1st excited section, the sub core which forms the cylindrical magnetic substance (25) it has possessed with the plural 2nd excited sections which it possesses. The aforementioned plural 2nd excited sections are formed each sub core (25) position becoming independent in axial direction vis-a-vis the aforementioned 1st excited section, in order to be able to change. < Selective figure > Figure 1【解決手段】渦電流の計測プローブセンサ(100)は、励起部(20)と検出部(30)とを有している。励起部(20)は、円筒磁性体を形成するメインコア(21)と前記メインコア(21)の周囲に周方向にまかわれたソレノイドコイルであるメインコイル(22)とを含む第1励起部と、各サブコア(25)の軸方向が前記メインコア(21)の軸方向と同じになるように、前記第1励起部の周りに配置され、円筒磁性体を形成するサブコア(25)を有する複数の第2励起部とを有している。前記複数の第2励起部は、前記第1励起部に対して、各サブコア(25)の位置を軸方向に独立して変化し得るように構成される。【選択図】 図1
