MOBILE AE SENSOR FOR DEGRADATION PHENOMENON INSPECTION OF PC STRUCTURE

• Main Authors: ONO SHUICHI, TANIKURA IZUMI, TOYODA YUSUKE, ENOZONO MASAYOSHI, HAGIWARA NAOKI
• Format: Patent
• Language: English; Japanese
• Published: 28.11.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To provide a mobile AE sensor that solves the problems of the workability and high cost of a conventional fixed type AE sensor, can move, is sensitive to the frequency in a broad band, and can obtain an accurate inspection result at a pinpoint.SOLUTION: A mobile AE sensor has the following configuration. A slide plate 3 formed of a thin phosphor bronze plate is integrally attached to the lower end side of a cylindrical case body 2 by soldering. An oscillator (piezoelectric element) 6 formed of a brass plate 4 and a ceramic plate 5 is attached to the slide plate 3. A negative electrode drawing line 7 is connected between the brass plate 4 and the case body 2, one end of a positive electrode drawing line 8 is attached to the ceramic plate 5, the other end of the positive electrode drawing line 8 is connected to a BNC contact plug 9 attached to the side surface of the case body 2. A top cover 10 is installed and attached at the upper end of the case body in an airtight state.SELECTED DRAWING: Figure 1 【課題】従来の固定型ＡＥセンサにおける作業性及びコスト高の問題点を解決し、移動が可能であって広帯域の周波数に感度を有し、且つピンポイントで正確な検査結果が得られる移動型ＡＥセンサを提供する。【解決手段】移動型ＡＥセンサは、円筒状を呈するケース本体２の下端部側に厚さの薄いリン青銅板からなる摺動板３が半田付けにより一体的に取り付けられ、該摺動板３に黄銅板４とセラミック板５とからなる振動子（圧電素子）６が取り付けられ、前記黄銅板４とケース本体２との間に負極引き出し線７を接続し、セラミック板５に正極引き出し線８の一端部を取付け、正極引き出し線８の他端部はケース本体２の側面に取付けたＢＮＣ接栓９に接続され、ケース本体の上端部には上蓋１０が気密状態に施蓋されて取り付けられた構成を有する。【選択図】図１