JP2021085811A - 超音波検査方法及び超音波検査装置 - Google Patents
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/341—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4463—Signal correction, e.g. distance amplitude correction [DAC], distance gain size [DGS], noise filtering
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
Description
11 超音波センサ
12 制御装置
13 計算機
31、31A、31B、31C 波形データ
32 波形データ
33 波形データ
34、34A、34B 合成波形データ
35、35A、35B 整合フィルタ
36、36A、36B 圧縮波形データ
37 二次圧縮波形データ
Claims (10)
- 超音波センサへパルス信号を出力して超音波を発生させて送信し、対象物で反射又は散乱された超音波を前記超音波センサで受信すると共に波形信号に変換し、前記波形信号をデジタル化して波形データを取得する超音波検査方法において、
複数回の検査で且つ同一の検査条件で取得されるか若しくは複製されて取得された複数の波形データを用い、位相変調方式又は線形周波数変調方式によって変調して合成波形データを生成する変調処理と、
前記合成波形データを復調して圧縮波形データを生成する復調処理とを実行することを特徴とする超音波検査方法。 - 請求項1に記載の超音波検査方法において、
前記復調処理は、前記合成波形データを時間的に反転させた整合フィルタを生成し、前記合成波形データに対し前記整合フィルタを用いて畳み込み積分を行って圧縮波形データを生成することを特徴とする超音波検査方法。 - 請求項1に記載の超音波検査方法において、
前記変調処理は、前記複数の波形データを時間的にずらすと共に予め設定された符号列に従って正の符号及び負の符号のうちのいずれかを掛けて合算する位相変調方式により、合成波形データを生成することを特徴とする超音波検査方法。 - 請求項3に記載の超音波検査方法において、
前記変調処理は、2種類の符号列を用いて2種類の合成波形データをそれぞれ生成し、
前記復調処理は、前記2種類の合成波形データを時間的に反転させた2種類の整合フィルタをそれぞれ生成し、前記2種類の合成波形データに対し前記2種類の整合フィルタを用いて畳み込み積分を行って2種類の一次圧縮波形データをそれぞれ生成し、前記2種類の一次圧縮波形データを合算して二次圧縮波形データを生成することを特徴とする超音波検査方法。 - 請求項1に記載の超音波検査方法において、
前記復調処理は、前記パルス信号に基づいた数値解析によって位相が異なる複数種類の整合フィルタを生成し、前記合成波形データに対し前記複数種類の整合フィルタを用いて畳み込み積分を行って複数種類の圧縮波形データをそれぞれ生成し、前記波形データの位相として、前記複数種類の圧縮波形データのうちの振幅が最大である圧縮波形データに対応する前記整合フィルタの位相を取得することを特徴とする超音波検査方法。 - 超音波センサと、
前記超音波センサへパルス信号を出力して超音波を発生させて送信し、対象物で反射又は散乱された超音波が前記超音波センサで受信されて変換された波形信号を入力し、前記波形信号をデジタル化して波形データを取得する制御装置と、
前記制御装置で取得された波形データを処理する計算機と、を備えた超音波検査装置において、
前記計算機は、
複数回の検査で且つ同一の検査条件で取得されるか若しくは複製されて取得された複数の波形データを用い、位相変調方式又は線形周波数変調方式によって変調して合成波形データを生成する変調処理と、
前記合成波形データを復調して圧縮波形データを生成する復調処理と、を実行することを特徴とする超音波検査装置。 - 請求項6に記載の超音波検査装置において、
前記復調処理は、前記合成波形データを時間的に反転させた整合フィルタを生成し、前記合成波形データに対し前記整合フィルタを用いて畳み込み積分を行って圧縮波形データを生成することを特徴とする超音波検査装置。 - 請求項6に記載の超音波検査装置において、
前記変調処理は、前記複数の波形データを時間的にずらすと共に予め設定された符号列に従って正の符号及び負の符号のうちのいずれかを掛けて合算する位相変調方式により、合成波形データを生成することを特徴とする超音波検査装置。 - 請求項8に記載の超音波検査装置において、
前記変調処理は、2種類の符号列を用いて2種類の合成波形データをそれぞれ生成し、
前記復調処理は、前記2種類の合成波形データを時間的に反転させた2種類の整合フィルタをそれぞれ生成し、前記2種類の合成波形データに対し前記2種類の整合フィルタを用いて畳み込み積分を行って2種類の一次圧縮波形データをそれぞれ生成し、前記2種類の一次圧縮波形データを合算して二次圧縮波形データを生成することを特徴とする超音波検査装置。 - 請求項6に記載の超音波検査装置において、
前記復調処理は、前記パルス信号に基づいた数値解析によって位相が異なる複数種類の整合フィルタを生成し、前記合成波形データに対し前記複数種類の整合フィルタを用いて畳み込み積分を行って複数種類の圧縮波形データをそれぞれ生成し、前記波形データの位相として、前記複数種類の圧縮波形データのうちの振幅が最大である圧縮波形データに対応する前記整合フィルタの位相を取得することを特徴とする超音波検査装置。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH049658A (ja) * | 1990-04-27 | 1992-01-14 | Mitsubishi Electric Corp | 測定装置 |
JPH06207928A (ja) * | 1992-06-09 | 1994-07-26 | Nkk Corp | 超音波探傷装置の信号処理装置 |
JP2003004712A (ja) * | 2001-06-22 | 2003-01-08 | Mitsubishi Electric Corp | 超音波探傷装置 |
WO2005058167A2 (ja) * | 2003-12-02 | 2005-06-30 | Hitachi Medical Corp | 超音波診断装置 |
CN103235039A (zh) * | 2013-04-25 | 2013-08-07 | 哈尔滨工业大学 | 基于线性调频技术的焊缝缺陷超声tofd检测方法 |
JP2014102138A (ja) * | 2012-11-20 | 2014-06-05 | Mitsubishi Electric Corp | 測定装置 |
JP2017099423A (ja) * | 2014-02-28 | 2017-06-08 | 日立アロカメディカル株式会社 | 超音波撮像装置 |
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US8934587B2 (en) * | 2011-07-21 | 2015-01-13 | Daniel Weber | Selective-sampling receiver |
CA2962785A1 (en) * | 2014-10-07 | 2016-04-14 | Butterfly Network, Inc. | Ultrasound signal processing circuitry and related apparatus and methods |
WO2017188466A1 (ko) * | 2016-04-26 | 2017-11-02 | 서강대학교 산학협력단 | 복합 변조 코드를 이용한 초음파 신호 처리 장치 및 방법 |
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH049658A (ja) * | 1990-04-27 | 1992-01-14 | Mitsubishi Electric Corp | 測定装置 |
JPH06207928A (ja) * | 1992-06-09 | 1994-07-26 | Nkk Corp | 超音波探傷装置の信号処理装置 |
JP2003004712A (ja) * | 2001-06-22 | 2003-01-08 | Mitsubishi Electric Corp | 超音波探傷装置 |
WO2005058167A2 (ja) * | 2003-12-02 | 2005-06-30 | Hitachi Medical Corp | 超音波診断装置 |
JP2014102138A (ja) * | 2012-11-20 | 2014-06-05 | Mitsubishi Electric Corp | 測定装置 |
CN103235039A (zh) * | 2013-04-25 | 2013-08-07 | 哈尔滨工业大学 | 基于线性调频技术的焊缝缺陷超声tofd检测方法 |
JP2017099423A (ja) * | 2014-02-28 | 2017-06-08 | 日立アロカメディカル株式会社 | 超音波撮像装置 |
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