JPS6371645A - Method for inspecting defect in cylindrical body - Google Patents
Method for inspecting defect in cylindrical bodyInfo
- Publication number
- JPS6371645A JPS6371645A JP21555186A JP21555186A JPS6371645A JP S6371645 A JPS6371645 A JP S6371645A JP 21555186 A JP21555186 A JP 21555186A JP 21555186 A JP21555186 A JP 21555186A JP S6371645 A JPS6371645 A JP S6371645A
- Authority
- JP
- Japan
- Prior art keywords
- specimen
- displayed
- tested
- monitor
- temperature distribution
- 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
- 230000007547 defect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 8
- 230000005856 abnormality Effects 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、円筒体の白肉部又は表面被覆塗膜の傷、空洞
、ひび割れ、剥離等の内部欠陥を検査する方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for inspecting internal defects such as flaws, cavities, cracks, and peeling in the white part of a cylindrical body or a surface coating film.
従来、円筒体の被覆塗膜の欠陥検査は、供試体の表面を
顕微鏡又はカメラの接写等てより拡大して観察し表面の
欠陥を検査している。Conventionally, defects in the coating film of a cylindrical body have been inspected by observing the surface of the specimen under magnification using a microscope or a camera, and inspecting the surface for defects.
しかしながら、顕微鏡やカメラによる欠陥検査では塗膜
表面のひび割れは検出できても、表面から見えない塗膜
の剥離は検出不可能である。However, although cracks on the surface of a coating film can be detected by defect inspection using a microscope or a camera, peeling of the coating film that is not visible from the surface cannot be detected.
本発明は、このような事情に鑑みて提案されたもので、
円筒体の白肉部又は表面被覆塗膜の傷、空洞、ひび割れ
、剥離等の内部欠陥の存在及びその位置を適確に検出で
きる円筒体内部欠陥検査方法を提供することを目的とす
る。The present invention was proposed in view of these circumstances, and
It is an object of the present invention to provide a method for inspecting internal defects of a cylindrical body that can accurately detect the presence and position of internal defects such as flaws, cavities, cracks, and peeling in the white part of a cylindrical body or a surface coating film.
そのために本発明は、円筒状供試体をその軸周りに回転
可能に支持するとともにその内部疋加熱流体を流通させ
て均一て加熱し、上記供試体の表面を外部から赤外線カ
メラで軸に平行（で−次元的に走査して表面温度状態を
モニターテレビ画面上に表示するとともＣ（、上記供試
体をモニターテレビの１画面表示時間内に１回転するよ
うに水平同期信号に同期して一定角度ずつ回転させ、上
記モニターテレビ画面上に供試体全周の温度分布を展開
表示し、表示温度分布の異常より供試体の内部欠陥を検
出することを特徴とする。To this end, the present invention supports a cylindrical specimen rotatably around its axis, circulates a heating fluid inside the specimen to uniformly heat it, and measures the surface of the specimen from the outside parallel to the axis with an infrared camera. The surface temperature state is displayed on the monitor TV screen by scanning it dimensionally. The temperature distribution around the entire periphery of the specimen is displayed on the monitor television screen, and an internal defect in the specimen is detected from an abnormality in the displayed temperature distribution.
円筒状供試体を加熱流体に上り内部から均一に加熱し、
供試体表面温度を外側から赤外線カメラで計測すると、
欠陥部位は熱伝導が悪く周囲の正常な場所よう表面温度
が低くなるため、表面温度分布の異常から供試体内内部
及び表面塗膜内の欠陥の検出ができる。円筒状供試体を
赤外線カメラのモニターテレビの１画面表示時間で１回
転させることにより、供試体の円周方向全体の温度分布
を展開表示でき、従って表面全体の欠陥が明確に検出で
きる。A cylindrical specimen is heated evenly from the inside by a heating fluid.
When the surface temperature of the specimen is measured from the outside with an infrared camera,
Since the defective site has poor thermal conductivity and its surface temperature is lower than that of the surrounding normal areas, defects inside the specimen and within the surface coating can be detected from abnormalities in the surface temperature distribution. By rotating the cylindrical specimen once in the display time of one screen of the infrared camera monitor television, the temperature distribution of the entire circumferential direction of the specimen can be displayed in an expanded manner, and defects on the entire surface can therefore be clearly detected.
本発明の一実施例を図面について説明すると、第１図は
本発明方法の実施装置の系統図、第２図は同上における
モニターテレビ画面の説明図である。An embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a system diagram of an apparatus for implementing the method of the present invention, and Fig. 2 is an explanatory diagram of a monitor television screen in the same.
第１図において、円筒状供試体１はその軸周りに回転可
能に試料台２に支持され、内部には、ヒーターコントロ
ーラー３に調節される空気加熱ヒーター４により一定温
度に加熱された加熱空気５が空気循環ブロワ−６により
循環流通されておシ、供試体１全体が均一に加熱される
。In FIG. 1, a cylindrical specimen 1 is rotatably supported on a sample stage 2 around its axis, and inside is heated air 5 heated to a constant temperature by an air heater 4 controlled by a heater controller 3. is circulated by an air circulation blower 6, and the entire specimen 1 is heated uniformly.
均一に加熱される供試体１の表面は、外部から赤外線カ
メラ７で軸に平行に一次元的罠走査されて表面温度状態
がモニターテレビ８の画面上に表示されるとともに、一
方供試体１は、供試体回転モーター９により赤外線カメ
ラ７の水平同期信号１０に同期して、一定角度ずつ矢印
１１のように回転され、かつその回転角度はモニターテ
レビ８の１画面表示時間で１回転するよりに、モーター
コントローラー１２で設定制御される。The surface of the specimen 1, which is heated uniformly, is one-dimensionally scanned parallel to the axis by an infrared camera 7 from the outside, and the surface temperature state is displayed on the screen of the monitor television 8. , the specimen rotating motor 9 rotates the specimen by a fixed angle as shown by the arrow 11 in synchronization with the horizontal synchronization signal 10 of the infrared camera 7, and the rotation angle is larger than one rotation per screen display time of the monitor television 8. , the settings are controlled by the motor controller 12.
従って第２図に示すように１同図（Ａ）の供試体１の表
面位置角度１６におけるカメラ観ｄ′ｊ方向１７からの
カメラ走査線は、同図（Ｂ）のモニターテレビ画面１８
上において各画面位置１９の表示走査線２０として表示
され、モニターテレビ８の１画面１８上に供試体１全周
の温度分布が展開表示される。Therefore, as shown in FIG. 2, the camera scanning line from the camera viewing direction d'j at the surface position angle 16 of the specimen 1 in FIG.
It is displayed as a display scanning line 20 at each screen position 19 at the top, and the temperature distribution around the entire circumference of the specimen 1 is displayed in an expanded manner on one screen 18 of the monitor television 8.
よって供試体１の内肉部又は表面塗膜に傷。Therefore, the inner wall or surface coating of Specimen 1 was damaged.
空洞、ひび割れ、剥離等の欠陥があれば、各走査＠２０
で表示される温度かその点において周囲と差異が生じ、
欠陥の存在とその位置が検出される。If there are defects such as cavities, cracks, peeling etc., each scan @20
There is a difference from the surroundings in the temperature displayed,
The presence of defects and their locations are detected.
供試体１の一定軸長区間での検査が終了すると、試料台
２はモーターコントローラー１３で制御される試料台９
乃モーター１４に接続式れかせ料台鴬勤わ１−１５の目
映により、長手方向に移動し、次の区間が検査される。When the inspection of the specimen 1 in a certain axial length section is completed, the specimen stage 2 is moved to the specimen stage 9 controlled by the motor controller 13.
The inspection machine 1-15 connected to the motor 14 moves in the longitudinal direction and inspects the next section.
このような方法によれば、円筒状供試体１を加熱空気５
で加熱するため、全体が均一な温度分布となシ、欠陥に
よって生じる微小な温度分布の異常検出が可能となり、
また円筒状供試体１表面の温度分布をモニターテレビ８
の画面上に展開表示するため、欠陥部位の特定が容易と
なる。According to this method, the cylindrical specimen 1 is heated with heated air 5.
Since the heating is done by heating, the entire temperature distribution is uniform, and it is possible to detect minute temperature distribution abnormalities caused by defects.
In addition, the temperature distribution on the surface of the cylindrical specimen 1 was monitored on the TV 8.
Since the image is expanded and displayed on the screen, it is easy to identify the defective part.
要するに本発明によれば、円筒状供試体をその軸周りに
回転可能に支持するとともにその内部に加熱流体を流通
させて均一に加熱し、上記供試体の表面を外部から赤外
線カメラで軸に平行に一次元的に走査して表面温度状態
をモニターテレビ画面上て表示するとともに、上記供試
体をモニターテレビの１画面表示時間内に１回転するよ
って水平同期信号に同期して一定角度ずつ回転させ、上
記モニターテレビ画面上に供試体全周の温度分布を展開
表示し、表示温度分布の異常より供試体の内部欠陥を検
出することにより、円筒体の内肉部又は表面被覆塗膜の
傷、空洞、ひび割れ、剥離等の内部欠陥の存在及びその
位置を適確疋検出できる円筒体内部欠陥検査方法を得る
から、本発明は産業上極めて有益なものである。In short, according to the present invention, a cylindrical specimen is supported rotatably around its axis, a heating fluid is circulated inside the specimen to uniformly heat it, and the surface of the specimen is inspected from the outside parallel to the axis using an infrared camera. The surface temperature state is displayed on a monitor television screen by one-dimensional scanning, and the specimen is rotated by a constant angle in synchronization with a horizontal synchronization signal by rotating once within one screen display time of the monitor television. By displaying the temperature distribution around the entire circumference of the specimen on the monitor TV screen and detecting internal defects in the specimen from abnormalities in the displayed temperature distribution, damage to the inner wall of the cylindrical body or surface coating coating, The present invention is industrially extremely useful because it provides a method for inspecting internal defects in a cylindrical body that can accurately detect the presence and location of internal defects such as cavities, cracks, and peeling.
第１図は本発明円筒体内部欠陥検査方法の一実施例てお
ける実施装置の系統図、第２図は同上におけるモニター
テレビ画面の説明図である。
１・・・供試体、２・・・試料台、３・・・ヒーターコ
ントローラー、４・・・空気加熱ヒーター、５・・・加
熱空気、６・・・空気循環ブロワ−１７・・・赤外線カ
メラ、８・・・モニターテレビ、９・・・供試体回転モ
ーター、１０・・・水平同期信号、１１・・・供試体回
転方向、１２・・・モーターコントローラー、１３・・
・モーターコントローラー、１４・・・試料台移動モー
ター、１５・・・試料台移動ねじ、１６・・・供試体表
面位置、１７・・・赤外線カメラ観測方向、１８・・・
モニターテレビ画面、１９・・・供試体表面位置角度（
′ｉ：対応する画面上の位置、２０・・・表示走査線。
復代理人 弁理士 塚 本 正 支
竿７図
第２図
（Ａ’）
易びFIG. 1 is a system diagram of an implementation apparatus in one embodiment of the method for inspecting internal defects in a cylindrical body of the present invention, and FIG. 2 is an explanatory diagram of a monitor television screen in the same. 1... Specimen, 2... Sample stage, 3... Heater controller, 4... Air heating heater, 5... Heated air, 6... Air circulation blower, 17... Infrared camera , 8...Monitor TV, 9...Specimen rotation motor, 10...Horizontal synchronization signal, 11...Specimen rotation direction, 12...Motor controller, 13...
- Motor controller, 14... Sample stage moving motor, 15... Sample stage moving screw, 16... Specimen surface position, 17... Infrared camera observation direction, 18...
Monitor TV screen, 19...Specimen surface position angle (
'i: Corresponding position on the screen, 20...Display scanning line. Sub-Agent Patent Attorney Tadashi Tsukamoto Figure 7 Figure 2 (A') Easy
Claims (1)
加熱し、上記供試体の表面を外部から赤外線カメラで軸
に平行に一次元的に走査して表面温度状態をモニターテ
レビ画面上に表示するとともに、上記供試体をモニター
テレビの１画面表示時間内に１回転するように水平同期
信号に同期して一定角度ずつ回転させ、上記モニターテ
レビ画面上に供試体全周の温度分布を展開表示し、表示
温度分布の異常より供試体の内部欠陥を検出することを
特徴とする円筒体内部欠陥検査方法。[Scope of Claims] A cylindrical specimen is supported rotatably around its axis, and a heating fluid is circulated inside to uniformly heat the specimen, and the surface of the specimen is inspected from the outside parallel to the axis using an infrared camera. The surface temperature state is displayed on the monitor TV screen by one-dimensional scanning, and the specimen is rotated by a constant angle in synchronization with the horizontal synchronization signal so that it rotates once within the display time of one screen on the monitor TV. A method for inspecting internal defects in a cylindrical body, characterized in that the temperature distribution around the entire circumference of the specimen is displayed on the monitor television screen, and internal defects in the specimen are detected from abnormalities in the displayed temperature distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21555186A JPS6371645A (en) | 1986-09-12 | 1986-09-12 | Method for inspecting defect in cylindrical body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21555186A JPS6371645A (en) | 1986-09-12 | 1986-09-12 | Method for inspecting defect in cylindrical body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6371645A true JPS6371645A (en) | 1988-04-01 |
Family
ID=16674303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21555186A Pending JPS6371645A (en) | 1986-09-12 | 1986-09-12 | Method for inspecting defect in cylindrical body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6371645A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212044A (en) * | 1988-06-30 | 1990-01-17 | Nkk Corp | Method for detecting faulty part by infrared camera |
| JPH0212045A (en) * | 1988-06-30 | 1990-01-17 | Nkk Corp | Method for detecting faulty part by infrared camera |
| JPH0257953A (en) * | 1988-08-24 | 1990-02-27 | Nkk Corp | Method for detecting thin part as defective part at inner surface of pipe |
| EP1216946A2 (en) * | 2000-12-22 | 2002-06-26 | General Electric Company | System and method for detecting debonding rubber coated rolls |
| US20110310923A1 (en) * | 2010-06-17 | 2011-12-22 | Robert Strohmeyer | Method for non-destructive testing of at least partially open hollow components or system components for tightness in series production |
-
1986
- 1986-09-12 JP JP21555186A patent/JPS6371645A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212044A (en) * | 1988-06-30 | 1990-01-17 | Nkk Corp | Method for detecting faulty part by infrared camera |
| JPH0212045A (en) * | 1988-06-30 | 1990-01-17 | Nkk Corp | Method for detecting faulty part by infrared camera |
| JPH0257953A (en) * | 1988-08-24 | 1990-02-27 | Nkk Corp | Method for detecting thin part as defective part at inner surface of pipe |
| EP1216946A2 (en) * | 2000-12-22 | 2002-06-26 | General Electric Company | System and method for detecting debonding rubber coated rolls |
| EP1216946A3 (en) * | 2000-12-22 | 2003-10-15 | General Electric Company | System and method for detecting debonding rubber coated rolls |
| US20110310923A1 (en) * | 2010-06-17 | 2011-12-22 | Robert Strohmeyer | Method for non-destructive testing of at least partially open hollow components or system components for tightness in series production |
| US8678643B2 (en) * | 2010-06-17 | 2014-03-25 | Inpro Innovationsgesellschaft Fur Fortgeschrittene Produktionssysteme In Der Fahrzeugindustrie Mbh | Method for non-destructive testing of at least partially open hollow components or system components for tightness in series production |
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