JPH08211026A - Eddy current sensor probe - Google Patents
Eddy current sensor probeInfo
- Publication number
- JPH08211026A JPH08211026A JP7018988A JP1898895A JPH08211026A JP H08211026 A JPH08211026 A JP H08211026A JP 7018988 A JP7018988 A JP 7018988A JP 1898895 A JP1898895 A JP 1898895A JP H08211026 A JPH08211026 A JP H08211026A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- amplifier
- signal
- eddy current
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
(57)【要約】
【目的】 コイルによる得た検知信号を、ノイズに埋も
れることなく取り出す。
【構成】 コイル１の後段にアンプ２を接続して構成し
た複数のチャンネルを備え、コイル１で検出してアンプ
２で増幅した各検知信号は、スイッチ３により順次サイ
クリックに選ばれる。選ばれた検知信号は長い信号ケー
ブル４を介して順次送出され、主アンプ５で増幅されて
解析・表示部６に送られ、解析・表示される。
(57) [Summary] [Purpose] The detection signal obtained by the coil is extracted without being buried in noise. [Configuration] A plurality of channels configured by connecting an amplifier 2 to the latter stage of the coil 1 are provided, and each detection signal detected by the coil 1 and amplified by the amplifier 2 is sequentially and cyclically selected by a switch 3. The selected detection signals are sequentially sent out through the long signal cable 4, amplified by the main amplifier 5, sent to the analysis / display unit 6, and analyzed / displayed.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加圧水型原子力発電プ
ラント内の蒸気発生器の中の細管等を非破壊で検査する
渦電流センサプローブに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eddy current sensor probe for nondestructively inspecting a thin tube or the like in a steam generator in a pressurized water nuclear power plant.
【０００２】[0002]
【従来の技術】従来の渦電流センサは、図５に示す様
に、コイルボビン７へ手巻き又は機械巻きでコイル１を
巻いてセンサが構成されていた。また、このセンサは、
図６に示す様に、コイル１を信号ケーブル４により主ア
ンプ５に接続してなる複数のチャンネルを、解析・表示
部６に接続することによりセンサプローブとなり、この
センサプローブにより例えばセンサで検知しようとする
欠陥の位置，長さ，幅等の情報を含めて検知することが
できる。2. Description of the Related Art A conventional eddy current sensor is constructed by winding a coil 1 around a coil bobbin 7 by manual winding or mechanical winding as shown in FIG. Also, this sensor
As shown in FIG. 6, a plurality of channels formed by connecting the coil 1 to the main amplifier 5 by the signal cable 4 are connected to the analysis / display section 6 to become a sensor probe. It is possible to detect the defect including the position, length, width, etc. of the defect.
【０００３】[0003]
【発明が解決しようとする課題】ところが上記従来の渦
電流センサプローブでは、コイル１で得られた検知情報
が数１０ｍを有するケーブル４を介した後にアンプ部５
で信号増幅されて、解析・表示部６にて信号の解析及び
解析結果の表示がなされていた。コイル１で得られる検
知情報は電気的に微小電圧レベルであり、ケーブル４に
おいてケーブル長さが長いために発生する雑音により、
コイル１で得られた検知情報が埋もれ、信号解析に於て
のＳ／Ｎ低下の問題点があった。However, in the above-mentioned conventional eddy current sensor probe, the amplifier unit 5 is provided after the detection information obtained by the coil 1 is passed through the cable 4 having several tens of meters.
Then, the signal was amplified by, and the analysis / display unit 6 analyzed the signal and displayed the analysis result. The detection information obtained by the coil 1 is an electrically minute voltage level, and due to the noise generated due to the long cable length in the cable 4,
The detection information obtained by the coil 1 was buried, and there was a problem of S / N reduction in signal analysis.
【０００４】また、センサを複数個配置させた場合に於
ては、ケーブル４、主アンプ５はコイルの配置個数分必
要でありケーブル断線、センサ価格アップの様な問題点
があった。Further, when a plurality of sensors are arranged, the cables 4 and the main amplifier 5 are required for the number of coils arranged, which causes problems such as cable breakage and sensor price increase.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記問題点を
解決するために、複数のコイルの後段にそれぞれ複数の
アンプを設けると共に、その更に後段へ複数個のコイル
から得られる情報を直列的に信号処理するためのスイッ
チを設け、このスイッチの信号を解析・表示部に送り１
本のケーブルを備えてセンサプローブを構成した事を特
徴とするものである。In order to solve the above-mentioned problems, the present invention provides a plurality of amplifiers in the subsequent stages of a plurality of coils, and further serializes the information obtained from the plurality of coils in the subsequent stage. A switch is provided for the purpose of signal processing, and the signal from this switch is sent to the analysis / display unit.
The present invention is characterized in that the sensor probe is configured with a book cable.
【０００６】[0006]
【作用】本発明の渦電流センサプローブは上記の様に構
成されているので、コイルで得られた検知情報は先ずア
ンプにおいて、ケーブルで発生する雑音に耐えうるレベ
ルまで増幅される。次にスイッチを順次切り換えてゆく
事により、コイルで得られた情報はケーブルを介して順
次送られ主アンプで増幅され、解析・表示部にて信号解
析され、検知情報が表示される。Since the eddy current sensor probe of the present invention is constructed as described above, the detection information obtained by the coil is first amplified in the amplifier to a level that can withstand the noise generated in the cable. Next, by sequentially switching the switches, the information obtained by the coil is sequentially transmitted through the cable, amplified by the main amplifier, and the analysis / display unit performs signal analysis to display the detection information.
【０００７】[0007]
【実施例】以下に本発明の実施例を図面に基づき詳細に
説明する。図１は本発明の実施例に係る渦電流センサプ
ローブを示す。本実施例ではコイル１の直後にアンプ２
を接続してなる複数チャンネルの検出部と、スイッチ３
と、長さの長い信号ケーブル４と、主アンプ５と、解析
・表示部６とで構成されている。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an eddy current sensor probe according to an embodiment of the present invention. In this embodiment, the amplifier 2 is provided immediately after the coil 1.
And a switch 3 for detecting a plurality of channels connected to each other.
And a long signal cable 4, a main amplifier 5, and an analysis / display unit 6.
【０００８】図２に示すようにコイル１は、金属のスパ
ッタ及びエッチング加工によりコイル基板８上に形成さ
れており、被検査部の欠陥等を検出する。アンプ２は、
コイル１で得た検知信号を増幅するＩＣ等で構成されて
いる。そしてコイル１及びアンプ２は基板９上に配置さ
れている。As shown in FIG. 2, the coil 1 is formed on the coil substrate 8 by metal sputtering and etching, and detects defects and the like in the inspected portion. Amplifier 2 is
It is composed of an IC or the like that amplifies the detection signal obtained by the coil 1. The coil 1 and the amplifier 2 are arranged on the substrate 9.
【０００９】基板９からは、図３に概念的に示すよう
に、各チャンネルを１つづつ順にサイクリックに選択す
る信号が発生しており、スイッチ３は、この選択信号に
応じて、各チャンネルの信号、つまりコイル１で検出し
てアンプ２で増幅した各検知信号を１つづつサイクリッ
クに選択する。このためスイッチ３から出力される信号
は、図４に示すように各チャンネルの信号が順につなが
った直列的な信号となる。直列的につながった各検知信
号は、信号ケーブル４により伝送され、主アンプ５で増
幅されてから解析・表示部６に送られる。解析・表示部
６では各検知信号を分離してから解析して、個々のコイ
ル１で検出した部分の状態を判定して、状態を表示す
る。From the substrate 9, as conceptually shown in FIG. 3, a signal for cyclically selecting each channel one by one is generated, and the switch 3 responds to this selection signal to select each channel. Signal, that is, each detection signal detected by the coil 1 and amplified by the amplifier 2 is cyclically selected one by one. Therefore, the signal output from the switch 3 is a serial signal in which the signals of the respective channels are sequentially connected as shown in FIG. Each detection signal connected in series is transmitted by the signal cable 4, amplified by the main amplifier 5, and then sent to the analysis / display unit 6. The analysis / display unit 6 separates each detection signal and then analyzes it to determine the state of the portion detected by each coil 1 and display the state.
【００１０】本実施例では各コイル１で検出した検知信
号を、信号ケーブル４に通す前に、アンプ２で増幅して
いるため、長い信号ケーブル４を通ってきても検知信号
のＳ／Ｎは良好であり、正確に欠陥検出ができる。In this embodiment, since the detection signal detected by each coil 1 is amplified by the amplifier 2 before being passed through the signal cable 4, the S / N of the detection signal is long even after passing through the long signal cable 4. It is good and can detect defects accurately.
【００１１】[0011]
【発明の効果】以上説明した様に本発明によれば、コイ
ルで得られた検知信号がケーブルによりＳ／Ｎ低下を起
こさない。また、複数個のコイルに対しても信号ケーブ
ルは１本で良く、ケーブル断線等によるトラブルの低減
が図れる。更にはケーブル費の削減が図れ、渦電流セン
サプローブの低コスト化が期待出来る。As described above, according to the present invention, the detection signal obtained by the coil does not cause S / N reduction due to the cable. Also, one signal cable is sufficient for a plurality of coils, and troubles due to cable breakage or the like can be reduced. Furthermore, the cable cost can be reduced, and the cost reduction of the eddy current sensor probe can be expected.
【図１】本発明の実施例に係る渦電流センサプローブを
示す構成図。FIG. 1 is a configuration diagram showing an eddy current sensor probe according to an embodiment of the present invention.
【図２】実施例のコイル及びアンプを示す斜視図。FIG. 2 is a perspective view showing a coil and an amplifier of the embodiment.
【図３】センサ選択信号を概念的に示す説明図。FIG. 3 is an explanatory view conceptually showing a sensor selection signal.
【図４】スイッチングされた検知信号の状態を示す波形
図。FIG. 4 is a waveform chart showing a state of a switched detection signal.
【図５】従来のセンサを示す斜視図。FIG. 5 is a perspective view showing a conventional sensor.
【図６】従来の渦電流センサプローブを示す構成図。FIG. 6 is a configuration diagram showing a conventional eddy current sensor probe.
１ コイル ２ アンプ ３ スイッチ ４ 信号ケーブル ５ 主アンプ ６ 解析・表示部 1 coil 2 amplifier 3 switch 4 signal cable 5 main amplifier 6 analysis / display section
Claims (1)
されコイル部からの検知信号を増幅する複数のアンプ部
と、各アンプ部から出力される信号を順次サクリックに
選んで出力するスイッチと、このスイッチを通して得ら
れる信号を解析・表示部に送信する１本のケーブルとで
なることを特徴とする渦電流センサプローブ。1. A plurality of coil units, a plurality of amplifier units connected to each coil unit for amplifying a detection signal from the coil units, and a signal output from each amplifier unit is sequentially and cyclically selected and output. An eddy current sensor probe comprising a switch and a cable for transmitting a signal obtained through the switch to an analysis / display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7018988A JPH08211026A (en) | 1995-02-07 | 1995-02-07 | Eddy current sensor probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7018988A JPH08211026A (en) | 1995-02-07 | 1995-02-07 | Eddy current sensor probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08211026A true JPH08211026A (en) | 1996-08-20 |
Family
ID=11986970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7018988A Pending JPH08211026A (en) | 1995-02-07 | 1995-02-07 | Eddy current sensor probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08211026A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006189364A (en) * | 2005-01-07 | 2006-07-20 | Olympus Corp | Eddy current flaw detection multi-coil type probe, and manufacturing method therefor |
| JP2007085990A (en) * | 2005-09-26 | 2007-04-05 | Akebono Brake Ind Co Ltd | Packing detection method and packing sensing device |
| WO2007052550A1 (en) | 2005-10-31 | 2007-05-10 | Sumitomo Metal Industries, Ltd. | Method for measuring s/n ratio in eddy current scratch on inner surface of tube |
| WO2014099106A3 (en) * | 2012-10-09 | 2014-08-28 | Westinghouse Electric Company Llc | Apparatus and method to switch ultrasonic signal paths in a moderately high radiation area |
| JP2022087809A (en) * | 2020-12-01 | 2022-06-13 | Ｊｆｅスチール株式会社 | Eddy current flaw detection probe, flaw detection method and eddy current flaw detector |
-
1995
- 1995-02-07 JP JP7018988A patent/JPH08211026A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006189364A (en) * | 2005-01-07 | 2006-07-20 | Olympus Corp | Eddy current flaw detection multi-coil type probe, and manufacturing method therefor |
| JP2007085990A (en) * | 2005-09-26 | 2007-04-05 | Akebono Brake Ind Co Ltd | Packing detection method and packing sensing device |
| WO2007052550A1 (en) | 2005-10-31 | 2007-05-10 | Sumitomo Metal Industries, Ltd. | Method for measuring s/n ratio in eddy current scratch on inner surface of tube |
| JP2007121193A (en) * | 2005-10-31 | 2007-05-17 | Sumitomo Metal Ind Ltd | S / N ratio measurement method for eddy current flaw detection on the inner surface of a tube |
| US8027796B2 (en) | 2005-10-31 | 2011-09-27 | Sumitomo Metal Industries, Ltd. | S/N ratio measuring method in eddy current testing on internal surface of pipe or tube |
| WO2014099106A3 (en) * | 2012-10-09 | 2014-08-28 | Westinghouse Electric Company Llc | Apparatus and method to switch ultrasonic signal paths in a moderately high radiation area |
| EP2907138A4 (en) * | 2012-10-09 | 2016-06-08 | Westinghouse Electric Corp | APPARATUS AND METHOD FOR SWITCHING ULTRASONIC SIGNAL PATHWAYS IN A MODERATELY HIGH RADIATION LEVEL AREA |
| US10128008B2 (en) | 2012-10-09 | 2018-11-13 | Westinghouse Electric Company Llc | Apparatus to switch ultrasonic signal paths in a moderately high radiation area |
| JP2022087809A (en) * | 2020-12-01 | 2022-06-13 | Ｊｆｅスチール株式会社 | Eddy current flaw detection probe, flaw detection method and eddy current flaw detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20001205 |