JP2018091803A - 複合材の超音波探傷装置及び方法 - Google Patents
複合材の超音波探傷装置及び方法 Download PDFInfo
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Abstract
Description
図1は、実施形態に係る超音波探傷装置1のブロック図である。図1に示すように、超音波探傷装置1は、水浸法に則って、検査対象となる複合材100と共に超音波探触子2を水中に浸漬した状態で超音波探傷を行うものである。なお、本実施形態では、水浸法を例示するが、他の方式(例えば、直接接触法)により超音波探傷を行ってもよい。超音波探傷装置1は、超音波探触子2と、超音波送受信器3と、A/D変換器4と、演算制御装置5と、入力装置6と、出力装置7と、探触子走査機8と、走査ドライバ9と、水槽10とを備える。
図2は、超音波探傷時の反射波を説明する図である。図2に示すように、複合材100は、例えば、CFRPからなる第1素材101とGFRPからなる第2素材102とを積層してなり、第1素材101と第2素材102との間に界面103(接合界面)が形成されている。超音波探触子2は、複合材100の所望の探傷点(探傷単位領域)において、第1素材101側から複合材100に超音波を照射する。
図3は、図1に示す超音波探傷装置1による欠陥判定を説明する図である。図3に示された各グラフは、演算制御装置5の反射波信号処理部53で受信され、時間軸波形で示された反射波のRF信号である。即ち、図3の各グラフにおいて、横軸は時間、縦軸は反射波高さ(エコー高さ)である。時間軸波形の反射波では、時間経過とともに、表面反射波、素材反射波(素材欠陥ありの場合)、及び界面反射波の順にそれぞれの波形が出現する。
図4は、超音波探傷の対象となる複合材を用いた板バネ210を含む鉄道車両用台車201の側面図である。図4に示すように、台車201は、空気バネ231を介して車体230を支持する横梁232(台車枠)と、車軸220を回転自在に支持する軸受(図示せず)を収容する軸箱221とを備える。横梁232と軸箱221との間には、車両長手方向に延びた板バネ210が架け渡され、板バネ210の中央部が横梁232を支持し、板バネ210の両端部が軸箱221に支持される。
53a 区間特定部
53b 素材欠陥判定部
53c 界面欠陥判定部
100 複合材
101 第1素材
102 第2素材
103 界面
210 板バネ
D1 素材欠陥
D2 界面欠陥
Claims (4)
- 物性の異なる複数の素材で構成された複合材の超音波探傷装置であって、
前記複合材に照射された超音波の反射波のRF信号において、素材反射波が発生し得る第1区間と界面反射波が発生し得る第2区間とを特定する区間特定部と、
前記第1区間において前記RF信号の値が正の第1閾値を上回ったか否かを判定する素材欠陥判定部と、
前記第2区間において前記RF信号の値が負の第2閾値を下回ったか否かを判定する界面欠陥判定部と、を備える、複合材の超音波探傷装置。 - 前記第2閾値の絶対値は、前記第1閾値よりも大きい、請求項1に記載の複合材の超音波探傷装置。
- 物性の異なる複数の素材で構成された複合材の超音波探傷方法であって、
前記複合材に照射された超音波の反射波のRF信号を受信する工程と、
前記RF信号のうち素材反射波が発生し得る第1区間において、前記RF信号の値が正の第1閾値を上回ったか否かを判定する工程と、
前記RF信号のうち界面反射波が発生し得る第2区間において、前記RF信号の値が負の第2閾値を下回ったか否かを判定する工程と、を備える、複合材の超音波探傷方法。 - 前記複合材は、GFRP層の両面にCFRP層が積層された三層構造を有する鉄道車両用板バネであり、
前記複数の素材は、前記CFRP層及び前記GFRP層を含み、
前記超音波は、前記CFRP層側から入射される、請求項3に記載の複合材の超音波探傷方法。
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JP2016237419A JP6761331B2 (ja) | 2016-12-07 | 2016-12-07 | 複合材の超音波探傷装置及び方法 |
US16/467,527 US11307177B2 (en) | 2016-12-07 | 2017-03-14 | Ultrasonic flaw detector and ultrasonic flaw detecting method for composite material |
CN201780075443.9A CN109997039B (zh) | 2016-12-07 | 2017-03-14 | 复合材料的超声波探伤装置及方法 |
PCT/JP2017/010188 WO2018105140A1 (ja) | 2016-12-07 | 2017-03-14 | 複合材の超音波探傷装置及び方法 |
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JP6510938B2 (ja) * | 2015-09-10 | 2019-05-08 | 川崎重工業株式会社 | 鉄道車両用台車の電極付き板バネの製造方法 |
US11644443B2 (en) * | 2018-12-17 | 2023-05-09 | The Boeing Company | Laser ultrasound imaging |
US20210186462A1 (en) * | 2019-12-19 | 2021-06-24 | GE Precision Healthcare LLC | Air filled chamber in an ultrasound probe |
CN111189912B (zh) * | 2020-01-13 | 2021-01-26 | 华南理工大学 | 一种发射参考超声波检测方法、装置及存储介质 |
CN111790641A (zh) * | 2020-06-19 | 2020-10-20 | 南京钢铁股份有限公司 | 一种棒材表面缺陷的探伤分选方法 |
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US20190323997A1 (en) | 2019-10-24 |
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