ELASTIC WAVE TRANSMITTING AND RECEIVING PROBE, MEASUREMENT DEVICE USING THE SAME, AND MEASUREMENT METHOD

• Main Authors: MATSUHASHI KANJI, UCHIDA SHINYA, KURIHARA YOICHI, KURIHARA HIDEO
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To evaluate the internal defects and quality of actual concrete structures from the reproducible elastic wave characteristics by utilizing the characteristics as incompressible fluid of water, and using it as a probe for transmitting and receiving elastic waves each having features of shock elastic wave method and ultrasonic wave method.SOLUTION: Non-destructive testing is performed by inputting an elastic wave to a test object m provided with a magnetostrictive sensor 4 comprising a ferromagnetic core 2 wound around a conductor 21 functioning as a pendulum, and a receiving sensor 3 for causing the ferromagnetic core 2 to function as a vibrator; a bottomed cylindrical liquid filling cylindrical portion 5 projecting from a bottom portion of a portion of the ferromagnetic core 2 of the magnetostrictive sensor 4; and a water chamber 7 equipped with a cup portion 6 exposed to a test object m formed in a liquid filling cylinder 5 in a watertight manner and by receiving the elastic wave propagated in the test object m.SELECTED DRAWING: Figure 3 【課題】水の非圧縮性流体としての特性を利用し、衝撃弾性波法と超音波法の特長をそれぞれ有する弾性波の発受信プローブとして用いることで、再現性のある弾性波特性から、コンクリートの実構造物における内部欠陥や品質の評価をする。【解決手段】振子として機能させる導線２１が巻回された強磁性体コア２と、強磁性体コア２を受振子として機能させる受信センサ３とから成る磁歪センサ４と、磁歪センサ４の強磁性体コア２の一部を底部から突出させた有底筒形状の液体充填筒部５と、液体充填筒部５に形成された、検査対象物ｍに水密状に当てるカップ部６とから成るウォーターチャンバー７と、を備えた。検査対象物ｍに弾性波を入力し、検査対象物ｍにおいて伝播した弾性波を受信して非破壊試験をする。【選択図】図３