JPH07136476A - Detection of defect position of hollow yarn membrane module - Google Patents
Detection of defect position of hollow yarn membrane moduleInfo
- Publication number
- JPH07136476A JPH07136476A JP31110793A JP31110793A JPH07136476A JP H07136476 A JPH07136476 A JP H07136476A JP 31110793 A JP31110793 A JP 31110793A JP 31110793 A JP31110793 A JP 31110793A JP H07136476 A JPH07136476 A JP H07136476A
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- defect
- membrane module
- laser beam
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多数本の中空糸膜を用
いた中空糸膜モジュールの欠陥位置検出方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a defective position of a hollow fiber membrane module using a large number of hollow fiber membranes.
【０００２】[0002]
【従来の技術】従来の中空糸膜モジュールの欠陥位置検
出方法としては、例えば図５に示すようなものが知られ
ている（特願平４−３１６４８０号参照）。2. Description of the Related Art As a conventional defect position detecting method for a hollow fiber membrane module, for example, a method shown in FIG. 5 is known (see Japanese Patent Application No. 4-316480).
【０００３】即ち、中空糸膜モジュール１０１に空気を
流し、欠陥箇所１１６を持つ中空糸膜１０２ａの端末か
ら流出する空気中の粒子（０．２μｍ程度）を中空糸膜
モジュール１０１端面の上方にスクリーン状に照射した
レーザー光１０７ａで照らし、その時に生じる散乱光１
１１ａ，１１２ａをＣＣＤカメラ１１３等で画像を取込
み、画像処理によって欠陥箇所の位置を検出するシステ
ムを示している。That is, air is caused to flow through the hollow fiber membrane module 101, and particles (about 0.2 μm) in the air flowing out from the end of the hollow fiber membrane 102a having the defective portion 116 are screened above the end surface of the hollow fiber membrane module 101. Illuminated by a laser beam 107a that is radiated in a circular shape, and scattered light generated at that time 1
The system in which images of 11a and 112a are captured by a CCD camera 113 or the like and the position of the defective portion is detected by image processing is shown.
【０００４】[0004]
【発明が解決しようとする課題】この従来方法の欠点
は、中空糸膜モジュール端面１０６とスクリーン状に照
射したレーザー光１０７ａの間の距離ｈを０ｍｍとする
ことができないため（距離ｈを０ｍｍにするとレーザー
光が中空糸膜モジュール１０１を照らしてしまい、欠陥
箇所の検出ができないため）、距離ｈを２〜２０ｍｍ程
度離す必要があることである。そして、中空糸膜モジュ
ール端面１０６とレーザー光１０７ａとの距離を遠くす
ると、欠陥位置の精度は悪化する傾向がある。特に中空
糸膜モジュール１０１の中に斜めになった糸が混じっ
て、斜め方向に空気が噴出されたり、噴出される空気の
流れが乱流になった場合、著しく精度が悪くなることが
これまでに分っている。The disadvantage of this conventional method is that the distance h between the end face 106 of the hollow fiber membrane module and the laser beam 107a radiated in a screen form cannot be 0 mm (the distance h is 0 mm. Then, the laser light illuminates the hollow fiber membrane module 101, and the defective portion cannot be detected.) Therefore, it is necessary to separate the distance h by about 2 to 20 mm. When the distance between the hollow fiber membrane module end face 106 and the laser beam 107a is increased, the accuracy of the defect position tends to deteriorate. In particular, when slanted fibers are mixed in the hollow fiber membrane module 101 and air is jetted in an oblique direction or the flow of jetted air becomes turbulent, the accuracy is remarkably deteriorated. I know.
【０００５】本発明は上記課題を解決するためになされ
たもので、その目的とするところは、中空糸膜モジュー
ルの欠陥位置を高精度に検出し得る中空糸膜モジュール
の欠陥位置検出方法を提供することにある。The present invention has been made to solve the above problems, and an object thereof is to provide a method for detecting a defect position of a hollow fiber membrane module, which can detect a defect position of the hollow fiber membrane module with high accuracy. To do.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明にあっては、ケース内に挿入された多数本の中
空糸膜をケース開口部にて各中空糸膜の端末を開口させ
た状態で封止してケース内部と外部とを離隔した中空糸
膜モジュールのケース内部から外部にかけて微粒子を含
む気体を通し、前記中空糸膜モジュールの封止部端面よ
り所定高さ離れた位置での面方向にレーザービームを照
射し、欠陥を有する中空糸膜の欠陥部より入って端末よ
り送出された微粒子に前記レーザービームが当たった際
に発生する散乱光を、中空糸膜モジュールの端面上方に
設けられている検出手段により検出し、該検出された情
報を処理手段にて処理して欠陥の位置を求める、中空糸
膜モジュールの欠陥位置検出方法であって、前記レーザ
ービームの面方向の照射を前記封止部端面より所定高さ
離れた複数位置で行い、該複数位置で検出された散乱光
に関する情報を前記処理手段で処理して欠陥の位置を求
める。In order to achieve the above object, in the present invention, a large number of hollow fiber membranes inserted in a case are opened at the ends of each hollow fiber membrane at the case opening. The hollow fiber membrane module, which is sealed in such a state that the inside and the outside are separated from each other, allows a gas containing fine particles to pass from the inside to the outside of the hollow fiber membrane module at a position separated from the end surface of the hollow fiber membrane module by a predetermined height. When the laser beam hits the fine particles emitted from the end of the hollow fiber membrane by irradiating the laser beam in the plane direction of the hollow fiber membrane module, the scattered light generated above the end face of the hollow fiber membrane module is emitted. A method for detecting the position of a defect in a hollow fiber membrane module, which comprises detecting the position of a defect by processing the detected information by a processing unit provided in Irradiation is performed at a plurality of positions spaced a predetermined height from the sealing end face, determine the position of the defect by processing the information about the scattered light detected by the plurality of positions in the processing means.
【０００７】[0007]
【作用】上記構成の本発明にあっては、欠陥のある中空
糸膜が中空糸膜モジュールの中に斜めに入っていて空気
がその端末より斜め方向に噴出されても、高さ方向に複
数位置で散乱光に関する情報を得るため、粒子を噴出し
た中空糸膜を正確に特定することができ、欠陥位置を高
精度に検出できる。In the present invention having the above structure, even if a defective hollow fiber membrane is obliquely inserted into the hollow fiber membrane module and air is jetted obliquely from its end, a plurality of hollow fiber membranes are formed in the height direction. Since the information on the scattered light is obtained at the position, the hollow fiber membrane from which the particles have been ejected can be accurately specified, and the defect position can be detected with high accuracy.
【０００８】[0008]
【実施例】以下に本発明を図示の実施例に基づいて説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.
【０００９】まず、欠陥位置検出の対象となる中空糸膜
モジュールについて説明する。この中空糸膜モジュール
１は、多数本の中空糸膜２を束ねてループ状（Ｕ字状）
として、その中空糸膜束３を両端を開口するケース４内
に挿入し、ケース４の一方の開口端部にて各中空糸膜２
間の隙間および各中空糸膜２とケース４間の隙間を封止
材としてのポッティング材５で封止固定し、ポッティン
グ材５により封止固定された各中空糸膜２の端末と硬化
したポッティング材５を共に切断し、各中空糸膜２端末
を開口して、封止部端面としての中空糸膜開口端面６を
形成して成り、各種気体や液体を中空糸膜２を通過して
濾過し、その濾過された流体を中空糸膜開口端面６から
流出するものである。First, the hollow fiber membrane module which is the object of defect position detection will be described. This hollow fiber membrane module 1 is formed by bundling a large number of hollow fiber membranes 2 in a loop shape (U shape).
As a result, the hollow fiber membrane bundle 3 is inserted into a case 4 having both ends open, and each hollow fiber membrane 2 is opened at one opening end of the case 4.
The gap between them and the gap between each hollow fiber membrane 2 and the case 4 are sealed and fixed by a potting material 5 as a sealing material, and the end of each hollow fiber membrane 2 sealed and fixed by the potting material 5 and the cured potting. The material 5 is cut together and each hollow fiber membrane 2 end is opened to form a hollow fiber membrane opening end surface 6 as a sealing portion end surface. Various gases and liquids are filtered through the hollow fiber membrane 2. The filtered fluid then flows out from the hollow fiber membrane opening end face 6.
【００１０】そして、以下に本発明の一実施例に係る中
空糸膜モジュールの欠陥位置検出装置について図１をも
とに説明する。A defect position detecting device for a hollow fiber membrane module according to an embodiment of the present invention will be described below with reference to FIG.
【００１１】この欠陥位置検出装置は、レーザービーム
７を発するレーザー光源８と、発せられたレーザービー
ム７を中空糸膜開口端面６の面方向（ｘ，ｙ）にスクリ
ーン状にするシリンドリカルレンズ９と、スクリーン状
のレーザービーム７ａを上方向Ｚに何水準か（ａ，ｂ，
ｃ）にふってやるためのプリズム１０と、中空糸膜開口
端面６上方に設けられた散乱光１１ａ，１２ａ，１１
ｂ，１２ｂ，…を検出する検出手段としてのＣＣＤカメ
ラ１３と、その検出された散乱光１１ａ，１２ａ，…を
処理して欠陥の位置を求める処理手段としての位置解析
パソコン１４と、から成っている。This defect position detecting device includes a laser light source 8 which emits a laser beam 7, and a cylindrical lens 9 which makes the emitted laser beam 7 a screen in the plane direction (x, y) of the hollow fiber membrane opening end face 6. , The level of the screen laser beam 7a in the upward direction Z (a, b,
(c) prism 10 for scattering, and scattered lights 11a, 12a, 11 provided above the hollow fiber membrane opening end face 6
.., and a position analysis personal computer 14 as processing means for processing the detected scattered light 11a, 12a ,. There is.
【００１２】次に、上記欠陥位置検出装置に基づいて、
中空糸膜モジュールの欠陥位置の検出方法について説明
する。Next, based on the above defect position detecting device,
A method of detecting the defect position of the hollow fiber membrane module will be described.
【００１３】中空糸膜モジュール１のケース４内部から
外部にかけて微粒子を含む気体１５を通し、中空糸膜モ
ジュール１の中空糸膜開口端面１６より所定高さ離れた
位置での面方向にスクリーン状のレーザービーム７ａを
照射し、欠陥を有する中空糸膜２ａの欠陥部１６より入
って端末より送出された微粒子に前記レーザービームが
当たった際に発生する散乱光１１ａ，１２ａ，…を、中
空糸膜モジュールの端面６上方に設けられているＣＣＤ
カメラ１３により検出し、その検出された情報を位置解
析パソコン１４にて処理して欠陥の位置を求める、そし
て本実施例では、レーザービームの面方向の照射を中空
糸膜開口端面６より所定高さ離れた複数位置で行い、そ
の高さ方向Ｚの複数位置で検出された散乱光１１ａ，１
２ａ，１１ｂ，１２ｂ…に関する情報（Ｘ−Ｙ座標）を
位置解析パソコン１４で処理して欠陥の位置を求める。A gas 15 containing fine particles is passed from the inside to the outside of the case 4 of the hollow fiber membrane module 1 to form a screen shape in a plane direction at a position separated from the hollow fiber membrane opening end surface 16 of the hollow fiber membrane module 1 by a predetermined height. The scattered light 11a, 12a, ... Generated when the laser beam hits the fine particles emitted from the terminal by irradiating the laser beam 7a and entering from the defective portion 16 of the hollow fiber membrane 2a having a defect, the hollow fiber membrane CCD provided above the end face 6 of the module
The position information is detected by the camera 13, and the detected information is processed by the position analysis personal computer 14 to determine the position of the defect. In this embodiment, the irradiation of the laser beam in the surface direction is higher than the hollow fiber membrane opening end surface 6 by a predetermined height. Scattered light 11a, 1 detected at a plurality of positions in the height direction Z.
The position analysis personal computer 14 processes the information (XY coordinates) about 2a, 11b, 12b ...
【００１４】ところで、図２に示すように、従来の場
合、ａのレーザービームだけで欠陥の位置を求めると、
（ｘ1 ，ｈ0 ）というように実際の位置（ｘ0 ，ｈ0 ）
と異なる位置が検出されてしまう。By the way, as shown in FIG. 2, in the conventional case, when the position of the defect is determined only by the laser beam of a,
(X 1, h 0) the actual position and so (x 0, h 0)
A different position will be detected.
【００１５】これに対し、本実施例では、ａ，ｂ，ｃの
レーザービームでの散乱光が発生した位置をもとに欠陥
を有する中空糸膜２ａの端末位置を特定するので、（ｘ
0 ，ｈ0 ）という正しい位置が求められる。On the other hand, in the present embodiment, the terminal position of the defective hollow fiber membrane 2a is specified based on the position where the scattered light of the a, b, and c laser beams is generated.
The correct position is 0 , h 0 ).
【００１６】このことを、図３を用いて更に詳しく説明
する。This will be described in more detail with reference to FIG.
【００１７】ｈ0 およびレーザー光の高さｈ1 ，ｈ2 ，
ｈ3 は予め明らかになっているものとすると空気中の粒
子が直線で近似できる場合は、ｈ1 ，ｈ2 の２水準での
ｘ座標ｘ1 ，ｘ2 を画像処理によって求めることができ
れば、数１により欠陥箇所ｘ0 の座標を求めることがで
きる。H 0 and the heights of the laser beams h 1 , h 2 ,
Assuming that h 3 has been clarified in advance, if particles in the air can be approximated by a straight line, if x coordinates x 1 and x 2 at two levels of h 1 and h 2 can be obtained by image processing, The coordinates of the defective portion x 0 can be obtained by the equation 1.
【００１８】[0018]
【数１】 また、乱流の発生により直線近似できない場合も、３水
準以上の座標（ｘ1 ，ｈ1 ），（ｘ2 ，ｈ2 ），（ｘ
3 ，ｈ3 ）…を求めてスプライン補間すれば、同様に欠
陥箇所を求めることができる。[Equation 1] Also, when linear approximation cannot be performed due to the occurrence of turbulence, coordinates (x 1 , h 1 ), (x 2 , h 2 ), (x
3 and h 3 ) ... And spline interpolation is performed, the defective portion can be similarly obtained.
【００１９】なお、先の実施例ではレーザー光はシリン
ドリカルレンズ９によって面方向（ｘ，ｙ）にスクリー
ン状となるようにしたが、スポット状のレーザービーム
をポリゴンミラーで面方向に走査してもよい。In the above embodiment, the laser light is made into a screen shape in the surface direction (x, y) by the cylindrical lens 9, but even if a spot-shaped laser beam is scanned in the surface direction by a polygon mirror. Good.
【００２０】また、先の実施例ではレーザー光をプリズ
ム１０によって高さ方向Ｚに幾数準かに振ったが、ポリ
ゴンミラーによって高さ方向Ｚに幾数準かに振ってもよ
い。Further, in the above embodiment, the laser beam was swung by the prism 10 in the height direction Z by several levels, but it may be swung by the polygon mirror in the height direction Z by several levels.
【００２１】また、図４に示すように２枚のミラー１
７，１８を組合せ一方１８を移動するなど、様々な方法
があるが、どのような方法でも構わない。Further, as shown in FIG. 4, two mirrors 1
There are various methods such as combining 7 and 18 and moving one, but any method may be used.
【００２２】[0022]
【発明の効果】以上説明したように本発明にあっては、
欠陥のある中空糸膜が中空糸膜モジュールの中に斜めに
入っていて、空気がその端末より斜め方向に噴出されて
も、高さ方向に複数位置で散乱光に関する情報を得るた
め、粒子を噴出した中空糸膜を正確に特定することがで
き、欠陥位置を高精度に検出できる。As described above, according to the present invention,
Even if a defective hollow fiber membrane is obliquely inserted in the hollow fiber membrane module and air is jetted obliquely from its end, particles are collected to obtain information about scattered light at multiple positions in the height direction. The blown hollow fiber membrane can be accurately specified, and the defect position can be detected with high accuracy.
【図１】本発明の一実施例に係る中空糸膜モジュールの
欠陥位置検出方法の装置構成を示す図である。FIG. 1 is a diagram showing an apparatus configuration of a method for detecting a defect position of a hollow fiber membrane module according to an embodiment of the present invention.
【図２】従来に比べて同検出方法が高精度になる理由を
説明する図である。FIG. 2 is a diagram for explaining the reason why the detection method is more accurate than the conventional method.
【図３】同検出方法の効果を詳細に説明する図である。FIG. 3 is a diagram for explaining in detail the effect of the detection method.
【図４】同検出方法の変形例を示す図である。FIG. 4 is a diagram showing a modification of the detection method.
【図５】従来の中空糸膜モジュールの欠陥位置検出方法
を説明する図である。FIG. 5 is a diagram illustrating a conventional defect position detection method for a hollow fiber membrane module.
１ 中空糸膜モジュール ２ 中空糸膜 ４ ケース ６ 中空糸膜開口端面（封止部端面） ７ レーザービーム １３ ＣＣＤカメラ（検出手段） １４ 位置解析パソコン（処理手段） １６ 欠陥部 １５ 気体 1 Hollow Fiber Membrane Module 2 Hollow Fiber Membrane 4 Case 6 Hollow Fiber Membrane Opening End Face (End Face of Sealing Part) 7 Laser Beam 13 CCD Camera (Detecting Means) 14 Position Analysis Personal Computer (Processing Means) 16 Defective Part 15 Gas
Claims (1)
をケース開口部にて各中空糸膜の端末を開口させた状態
で封止してケース内部と外部とを離隔した中空糸膜モジ
ュールのケース内部から外部にかけて微粒子を含む気体
を通し、 前記中空糸膜モジュールの封止部端面より所定高さ離れ
た位置での面方向にレーザービームを照射し、 欠陥を有する中空糸膜の欠陥部より入って端末より送出
された微粒子に前記レーザービームが当たった際に発生
する散乱光を、中空糸膜モジュールの端面上方に設けら
れている検出手段により検出し、 該検出された情報を処理手段にて処理して欠陥の位置を
求める、 中空糸膜モジュールの欠陥位置検出方法であって、 前記レーザービームの面方向の照射を前記封止部端面よ
り所定高さ離れた複数位置で行い、 該複数位置で検出された散乱光に関する情報を前記処理
手段で処理して欠陥の位置を求める、 中空糸膜モジュールの欠陥位置検出方法。1. A hollow fiber membrane in which the inside and outside of the case are separated by sealing a large number of hollow fiber membranes inserted in the case with the case opening portion at the end of each hollow fiber membrane being opened. A gas containing fine particles is passed from the inside to the outside of the module case, and a laser beam is radiated in the plane direction at a position separated by a predetermined height from the end surface of the sealing portion of the hollow fiber membrane module, thus causing a defect in the hollow fiber membrane. The scattered light generated when the laser beam hits the fine particles entering from the terminal and sent out from the terminal is detected by the detecting means provided above the end face of the hollow fiber membrane module, and the detected information is processed. A method for detecting a defect position of a hollow fiber membrane module, wherein the position of a defect is processed by a means, wherein irradiation of the laser beam in the surface direction is performed at a plurality of positions separated from the end surface of the sealing portion by a predetermined height. Determining the position of the defect information on the scattered light detected by the plurality of position by treatment with the processing means, a defect position detection method of the hollow fiber membrane module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31110793A JPH07136476A (en) | 1993-11-18 | 1993-11-18 | Detection of defect position of hollow yarn membrane module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31110793A JPH07136476A (en) | 1993-11-18 | 1993-11-18 | Detection of defect position of hollow yarn membrane module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07136476A true JPH07136476A (en) | 1995-05-30 |
Family
ID=18013231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31110793A Withdrawn JPH07136476A (en) | 1993-11-18 | 1993-11-18 | Detection of defect position of hollow yarn membrane module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07136476A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1296125A1 (en) * | 2001-03-30 | 2003-03-26 | Ngk Insulators, Ltd. | Inspection method and device for detecting defect |
| EP2001576A2 (en) * | 2006-03-31 | 2008-12-17 | Corning Incorporated | Honeycomb filter defect detecting method and appartus |
| US9038439B2 (en) | 2012-11-28 | 2015-05-26 | Corning Incorporated | Apparatus and methods for testing a honeycomb filter |
-
1993
- 1993-11-18 JP JP31110793A patent/JPH07136476A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1296125A1 (en) * | 2001-03-30 | 2003-03-26 | Ngk Insulators, Ltd. | Inspection method and device for detecting defect |
| EP1296125A4 (en) * | 2001-03-30 | 2006-12-13 | Ngk Insulators Ltd | Inspection method and device for detecting defect |
| EP2001576A2 (en) * | 2006-03-31 | 2008-12-17 | Corning Incorporated | Honeycomb filter defect detecting method and appartus |
| EP2001576A4 (en) * | 2006-03-31 | 2009-07-15 | Corning Inc | Honeycomb filter defect detecting method and appartus |
| US7674309B2 (en) | 2006-03-31 | 2010-03-09 | Corning Incorporated | Honeycomb filter defect detecting method and apparatus |
| US9038439B2 (en) | 2012-11-28 | 2015-05-26 | Corning Incorporated | Apparatus and methods for testing a honeycomb filter |
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