FLAW DETECTION RANGE DETERMINATION METHOD OF ULTRASONIC FLAW DETECTION DEVICE

• Main Authors: KODAMA KEIJI, MORI DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 11.07.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To provide a flaw detection range determination method of an ultrasonic flaw detection device which can perform reliable flaw detection without being affected by a shape of an object to be detected.SOLUTION: In a phased array type ultrasonic flaw detection device provided with a plurality of ultrasonic transducers 2A to 2C, a flaw detection range Ta of a flaw detection signal 2d is determined on the basis of a bottom surface echo signal 22 from an object 3 to be detected obtained by the ultrasonic transducer 2B which is at a position not affected by reflection from a curved cross section corner part 31 of the object 3 to be detected among the plurality of provided ultrasonic transducers 2A to 2C.SELECTED DRAWING: Figure 5 【課題】被探傷物の形状の影響を受けることなく確実な探傷を行うことができる超音波探傷装置の探傷範囲決定方法を提供する。【解決手段】複数の超音波振動子２Ａ〜２Ｃを設けたフェーズドアレイ式の超音波探傷装置において、複数設けた超音波振動子２Ａ〜２Ｃのうち被探傷物３の湾曲断面コーナ部３１からの反射の影響を受けない位置にある超音波振動子２Ｂで得られる被探傷物３からの底面エコー信号２２を基準として探傷信号２ｄの探傷範囲Ｔａを決定する。【選択図】 図５