JP2003042739A - Foreign matter inspecting method and device thereof - Google Patents
Foreign matter inspecting method and device thereofInfo
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- JP2003042739A JP2003042739A JP2001233901A JP2001233901A JP2003042739A JP 2003042739 A JP2003042739 A JP 2003042739A JP 2001233901 A JP2001233901 A JP 2001233901A JP 2001233901 A JP2001233901 A JP 2001233901A JP 2003042739 A JP2003042739 A JP 2003042739A
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- Prior art keywords
- foreign matter
- shape factor
- foreign
- foreign substance
- sheet
- 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.)
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Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フィルム又はシートの
異物を区別して認識する異物検査方法及び異物検査装置
であり、特に毛髪異物と炭化物異物を区別して認識する
異物検査装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign substance inspection method and a foreign substance inspection device for recognizing foreign substances on a film or a sheet, and more particularly to a foreign substance inspection device for recognizing foreign substances on a hair and a carbide foreign substance.
【０００２】[0002]
【従来の技術とその課題】従来の製造方法において製造
上発生する炭化物異物及び製造設備、原料から混入する
毛髪異物を異物検査機によって検出している。検出した
異物については、大きさ、数量によって区別を行ってい
る。しかし、検出した異物が毛髪異物であるか、炭化物
であるかの分別が出来ずにいた。そのため、人により判
断を行い多大の工数が必要であった。また、毛髪の混入
した製品を流出するおそれもあった。炭化物異物が多数
発生している場合の対処方法としては、押出機成形にお
いては、ストレーナー交換、押出機の解体清掃或いは、
口金の解体等の対処を行っていた。カレンダー成形にお
いては、解体清掃、焼き付き除去、バンク量の調整、再
生錬り混みの中止等の対処を行っていた。また毛髪異物
の場合は、原料の該当するロットを除外するなどの対処
を行っていた。従来の分別方法として、縦横比、面積比
を用いて行うことも考えられていたが形状上分類ができ
ないものがあることがわかった。その他、ファジー推論
を用いたものもあったが、形状を類似して判定するため
さまざまな形に変形する毛髪のようなものについては不
向きであった。2. Description of the Related Art In a conventional manufacturing method, a foreign material inspecting machine detects carbide foreign materials generated in manufacturing and hair foreign materials mixed from manufacturing equipment and raw materials. The detected foreign substances are distinguished by size and quantity. However, it was not possible to distinguish whether the detected foreign matter was a hair foreign matter or a carbide. Therefore, a lot of man-hours are required to be judged by a person. In addition, there is a possibility that the product containing hair may flow out. When a large number of carbide foreign matters are generated, as a countermeasure for extruder molding, strainer replacement, extruder disassembly cleaning, or
I was dealing with dismantling of the base. In the calender molding, measures such as dismantling cleaning, removal of seizure, adjustment of bank amount, and stopping of recycled kneading were taken. In addition, in the case of hair foreign substances, measures were taken such as excluding the corresponding lots of raw materials. As a conventional classification method, it has been considered to use the aspect ratio and the area ratio, but it was found that there is a method that cannot be classified in terms of shape. Others used fuzzy inference, but they were not suitable for hairs that deform into various shapes because the shapes are judged to be similar.
【０００３】異物検査装置より得られる画像データを画
像処理し形状係数を用い毛髪異物と炭化物異物の分別を
行い、毛髪混入製品の流出防止をすることを目的とす
る。It is an object of the present invention to prevent the outflow of hair-contaminated products by performing image processing on image data obtained from a foreign substance inspection apparatus and using a shape factor to separate foreign substances for hair from carbide foreign substances.
【０００４】[0004]
【課題を解決する手段】本発明は前記課題を解決するた
め、以下の手段を採用した。すなわち本発明の装置は、
フィルム又はシートに検査光を照射し、前記フィルム又
はシートを撮影して画像データを取り、撮像装置で得ら
れた画像データから輝度の変化部位を検出し、前記フィ
ルム又はシート中の異物を判別し、該異物の周長及び面
積とから異物の形状係数を算出して該異物の種類を分別
することを特徴とする異物検査方法である。The present invention adopts the following means in order to solve the above problems. That is, the device of the present invention is
Irradiate the film or sheet with inspection light, capture the image of the film or sheet to obtain image data, detect the changed portion of the brightness from the image data obtained by the image pickup device, and determine the foreign matter in the film or sheet. The foreign matter inspection method is characterized in that the shape factor of the foreign matter is calculated from the circumference and area of the foreign matter to classify the types of the foreign matter.
【０００５】また、前記フィルム又はシートが透明ある
いは半透明であり、検査光を照射し、照明装置の他方側
から前記フィルム又はシートを撮影して画像データを取
ることを特徴とする請求項１記載の異物検査方法であ
る。Further, the film or sheet is transparent or semi-transparent and is irradiated with inspection light, and the film or sheet is photographed from the other side of the illumination device to obtain image data. This is the foreign material inspection method.
【０００６】また、異物の特徴量である異物の面積値及
び異物の周長とから下記式（１）の形状係数を算出し毛
髪異物と炭化物異物を判別することを特徴とする請求項
１及至２に記載の検査方法である。
形状係数＝（周囲長２）／（４π×面積の和）…（１）
前記算出された形状係数が、下記式（２）形状係数のし
きい値以上であれば毛髪異物、より小さければ炭化物異
物と判別することを特徴とする請求項１及至３のいずれ
かに記載の検査方法である。
１．５≦形状係数のしきい値≦２．３…（２）Further, the shape factor of the following formula (1) is calculated from the area value of the foreign substance and the perimeter of the foreign substance, which are the characteristic amount of the foreign substance, and the hair foreign substance and the carbide foreign substance are discriminated from each other. It is the inspection method described in 2. Shape factor = (perimeter 2 ) / (4π × sum of areas) (1) Hair foreign matter if the calculated shape factor is equal to or more than the threshold value of the following formula (2) shape factor, and carbide if smaller. The inspection method according to any one of claims 1 to 3, wherein the inspection method is a foreign matter. 1.5 ≦ threshold of shape factor ≦ 2.3 (2)
【０００７】異物の特徴量である異物の面積値及び異物
の周長とから下記式（１）’の形状係数を算出し毛髪異
物と炭化物異物を判別することを特徴とする請求項１及
至２に記載の異物検査方法である。
形状係数＝（４π×面積の和）／（周囲長２）…（１）’3. A hair foreign substance and a carbide foreign substance are discriminated by calculating a shape factor of the following formula (1) 'from the foreign substance area value and the foreign substance peripheral length which are the characteristic amounts of the foreign substances. The foreign matter inspection method described in 1. Shape factor = (4π × sum of areas) / (perimeter 2 ) ... (1) ′
【０００８】前記算出された形状係数が、形状係数が下
記式（２）’の形状係数のしきい値以上であれば炭化物
異物、より小さいであれば毛髪異物と判別することを特
徴とする請求項１及至２、請求項５のいずれかに記載の
異物検査方法である。
０．４４≦形状係数のしきい値≦０．６５…（２）’If the calculated shape factor is greater than or equal to the threshold value of the shape factor of the following formula (2) ', it is determined to be a carbide foreign substance, and if it is smaller, it is determined to be a hair foreign substance. The foreign matter inspection method according to any one of claims 1 and 2 and claim 5. 0.44 ≦ threshold of shape factor ≦ 0.65 (2) ′
【０００９】また、フィルム又はシートに検査光を照射
する照明装置と、照明装置の他方側に配置して前記フィ
ルム又はシートを撮影して画像データを取る撮像装置
と、撮像装置で得られた画像データから輝度の変化部位
を検出し、前記フィルム又はシート中の異物を判別し、
該異物の周長及び面積とから異物の形状係数を算出して
該異物の種類を分別可能な欠陥検出画像処理装置とを備
えたことを特徴とする異物検査装置である。Further, an illuminating device for irradiating a film or sheet with inspection light, an image pickup device arranged on the other side of the illuminating device for photographing the film or sheet to obtain image data, and an image obtained by the image pickup device. Detect the brightness change part from the data, determine the foreign matter in the film or sheet,
A defect detection image processing apparatus capable of calculating the shape factor of a foreign substance from the perimeter and area of the foreign substance and discriminating the type of the foreign substance.
【００１０】ここで、前記照明装置が、拡散照明である
ことが好ましい。Here, it is preferable that the illuminating device is diffuse illumination.
【００１１】また、前記撮像装置が、１次元または２次
元カメラであることが好ましい。The image pickup device is preferably a one-dimensional or two-dimensional camera.
【００１２】本発明と適用し得るフィルム又はシートは
毛髪や異物がコントラスト良く判別できる透明又は半透
明のフィルム又はシートを透過光により撮影するのが好
ましい。The film or sheet to which the present invention can be applied is preferably a transparent or semitransparent film or sheet capable of discriminating hair or foreign matter with good contrast and photographed by transmitted light.
【００１３】[0013]
【発明の実施形態】以下は本発明の実施の実施形態を図
面に基づいて説明する。また、本発明はこれにより限定
されるものではない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to this.
【００１４】図１は、本発明に係わる透明あるいは半透
明のフィルム又はシートの炭化物異物と毛髪異物の区別
が可能な異物検査装置を示す構成説明図である。FIG. 1 is a structural explanatory view showing a foreign substance inspection apparatus capable of distinguishing a carbide foreign substance and a hair foreign substance of a transparent or translucent film or sheet according to the present invention.
【００１５】異物検査装置の構成としては、透明あるい
は半透明のフィルム又はシート１に検査光を照射する照
明装置２と、照明装置の他方側に配置して前記フィルム
又はシート１を撮影して画像データを取る撮像装置３
と、撮像装置で得た画像データから輝度の変化部位を検
出し、前記フィルム又はシート１中の異物を判別し、該
異物の周長及び面積とから異物の形状係数を算出して該
異物が毛髪異物か炭化物異物かを分別可能な欠陥検出画
像処理装置４と、欠陥検出画像処理装置により検査され
た結果、画像を取り込み表示・保存する分類結果表示端
末５と、毛髪異物あるいは炭化物異物が発生した際に、
現場の作業員に知らせる警報装置６とからなる。As the structure of the foreign matter inspection device, a transparent or semi-transparent film or sheet 1 is irradiated with inspection light, and an illuminating device 2 is arranged on the other side of the illuminating device to photograph the film or sheet 1 and image it. Image pickup device 3 for taking data
Then, the change part of the brightness is detected from the image data obtained by the image pickup device, the foreign matter in the film or sheet 1 is discriminated, and the shape factor of the foreign matter is calculated from the peripheral length and the area of the foreign matter to detect the foreign matter. A defect detection image processing device 4 capable of discriminating between a hair foreign substance and a carbide foreign substance, a classification result display terminal 5 for loading and displaying / saving an image as a result of inspection by the defect detection image processing device, and a hair foreign substance or a carbide foreign substance is generated. When I did
An alarm device 6 for informing a worker on site.
【００１６】透明あるいは半透明のフィルム又はシート
１は、押出成形或いは、カレンダー成形によりフィルム
又はシート状に成形される。また、透明あるいは半透明
のフィルム又はシートの厚みとしては、拡散照明の拡散
光を透過できる厚みであれば良く、好ましくは、５μｍ
から３ｍｍ程度の厚みのものである。また、検査時に透
明あるいは半透明のフィルム又はシートが揺れたりしな
いようにニップロール７a、７ｂでフィルムの揺れを防
止している。The transparent or translucent film or sheet 1 is formed into a film or sheet by extrusion molding or calendar molding. The transparent or translucent film or sheet may have any thickness as long as it can transmit the diffused light of the diffused illumination, and preferably has a thickness of 5 μm.
To about 3 mm in thickness. Further, the film is prevented from shaking by the nip rolls 7a and 7b so that the transparent or translucent film or sheet does not shake during the inspection.
【００１７】以下１次元カメラを用いた場合を実施形態
として説明するが、本発明はこの形態に限定されるもの
ではない。The case of using a one-dimensional camera will be described below as an embodiment, but the present invention is not limited to this embodiment.
【００１８】照明装置２は、透明あるいは半透明のフィ
ルム又はシートの幅方向をライン状に照射するライン状
の照明装置で、直線状に長い蛍光灯が好適に用いられ
る。また照明装置２は透明あるいは半透明のフィルム又
はシートの下方に架台などにより固定設置した。本発明
で用いる拡散照明は、樹脂の影響を受けにくいため撮像
された形状が得られ易い。このため、画像の形状より判
定を行う本検査装置には好適な照明である。また、拡散
照明としては、安価で輝度の安定した蛍光灯が好適であ
る。The illuminating device 2 is a linear illuminating device which irradiates a transparent or semi-transparent film or sheet in the width direction in a linear manner, and a linearly long fluorescent lamp is preferably used. The illuminating device 2 is fixedly installed under a transparent or translucent film or sheet by a mount or the like. The diffused illumination used in the present invention is less likely to be affected by the resin, and thus the imaged shape can be easily obtained. Therefore, the illumination is suitable for the present inspection apparatus that makes a determination based on the shape of the image. Further, as the diffused illumination, an inexpensive and stable fluorescent lamp is suitable.
【００１９】撮像装置３は、ライン状照明装置２により
照射された透明あるいは半透明のフィルム又はシート上
の測定ラインを撮影するものである。この撮像装置３
は、例えば、ラインセンサカメラであり、透明あるいは
半透明のフィルム又はシート上の水平方向に沿った測定
ラインを所定のタイミング毎に順次撮影して取り込み、
撮影した一次元の点列または線画像を電気信号である画
像信号に変換する。この信号には、輝度データが含まれ
ている。設置位置としては、透明あるいは半透明のフィ
ルム又はシートに対して、照明装置２の他方側に設置さ
れ、照明装置２、検査シート１の検査部と撮像装置３
は、直線上に配置することで、地合レベル（Ｓ）に対し
て異物レベル（Ｎ）の比（Ｓ／Ｎ比）が検出し易く配置
している。The image pickup device 3 photographs the measurement line on the transparent or translucent film or sheet illuminated by the linear illumination device 2. This imaging device 3
Is, for example, a line sensor camera, which sequentially captures and captures measurement lines along a horizontal direction on a transparent or translucent film or sheet at predetermined timings,
The photographed one-dimensional dot sequence or line image is converted into an image signal which is an electric signal. This signal contains luminance data. As the installation position, the transparent or semi-transparent film or sheet is installed on the other side of the illumination device 2, and the illumination device 2, the inspection unit of the inspection sheet 1 and the imaging device 3 are installed.
Are arranged on a straight line so that the ratio (S / N ratio) of the foreign matter level (N) to the formation level (S) can be easily detected.
【００２０】欠陥検出画像処理装置３は、撮像装置２よ
り取り込まれた電気信号である画像信号により、検出さ
れた異物の特徴量である異物の面積値及び周長値を算出
する。次いで、求められた異物の面積値及び周長値から
形状係数を下記式（１）より算出される。
形状係数＝（周囲長２）／（４π×面積の和）…（１）The defect detection image processing device 3 calculates the area value and the perimeter value of the foreign substance, which is the characteristic amount of the detected foreign substance, from the image signal which is the electric signal taken in by the image pickup device 2. Then, the shape factor is calculated from the obtained area value and perimeter value of the foreign matter by the following formula (1). Shape factor = (perimeter 2 ) / (4π × sum of areas) (1)
【００２１】算出された形状係数により、毛髪異物と炭
化物異物の判定は形状係数のしきい値により行ってい
る。形状係数のしきい値は、下記式（２）により表すこ
とができる。
１．５≦形状係数のしきい値≦２．３…（２）On the basis of the calculated shape factor, the foreign substance on the hair and the foreign substance on the carbide are determined by the threshold value of the shape factor. The threshold value of the shape factor can be expressed by the following equation (2). 1.5 ≦ threshold of shape factor ≦ 2.3 (2)
【００２２】式（１）により算出された形状係数が、形
状係数のしきい値より小さい場合は、炭化物異物と判定
を行う。また、式（１）により算出された形状係数が、
形状係数のしきい値以上場合は、毛髪異物と判定を行
う。毛髪異物の場合、形状が複雑あるいは細長いため、
面積の割合に比べて周囲長が長くなることから、比較的
大きな値の形状係数が算出されるためである。If the shape factor calculated by the equation (1) is smaller than the threshold value of the shape factor, it is determined that the foreign substance is a carbide. Also, the shape factor calculated by the equation (1) is
When the shape factor is equal to or larger than the threshold value, it is determined that the hair is foreign matter. In the case of hair foreign matter, the shape is complicated or elongated,
This is because the peripheral length is longer than the area ratio, and thus a relatively large shape factor is calculated.
【００２３】形状係数のしきい値に幅を持たせているの
は、カメラの解像度、照明の距離、照明の位置関係、シ
ートの透明度、周囲長の計算誤差などにより、実際の異
物の大きさより、やや大きくデータとして捕らえること
がある。あるいは、拡散照明が近い、シートの透明度、
周囲長の計算誤差などにより、実際の異物の大きさよ
り、やや小さくデータとして捕らえることがある。これ
らのため、形状係数のしきい値には幅を持たせる必要が
あり、検査条件が決定したところで、形状係数のしきい
値を決定する必要がある。The width of the shape factor threshold is made wider than the actual size of the foreign matter due to camera resolution, illumination distance, illumination positional relationship, sheet transparency, perimeter calculation error, etc. , It may be captured as data rather large. Or, the diffused lighting is close, the transparency of the sheet,
It may be captured as data that is slightly smaller than the actual size of the foreign matter due to an error in calculation of the perimeter. For this reason, it is necessary to allow the shape factor threshold value to have a width, and it is necessary to determine the shape factor threshold value when the inspection condition is determined.
【００２４】まず、形状係数しきい値の幅の決定方法を
図２を用いて説明する。形状係数の誤差の要因として上
記の要因が考えられるが、中でも周囲長の計測誤差によ
る形状係数の誤差は大きな要因であることが分かった。
そこで図２は周囲長の計測誤差による形状係数の変化値
のシュミレーションを示している。周囲長の誤差による
シュミレーションサンプルとしては、炭化物異物とし
て、三角形、１／２四角形、１／３四角形とし、毛髪異
物としては、１／４四角形とて行った。周囲長の計測誤
差範囲としては、周囲長を−１０％、−５％、理論値、
＋５％、＋１０％の５点でシュミレーションを行った。
その結果、毛髪異物の想定サンプルである１／４四角形
と、炭化物異物の想定サンプルである三角形との間で形
状係数のしきい値が引けることが分かった。また、周囲
長の誤差が−１０％から＋１０％の範囲で誤差を生じる
と形状係数としての誤差、つまり形状係数の範囲として
は、下記式（２）で表される。
１．５≦形状係数のしきい値≦２．３…（２）
また、式（２）を満足しない形状係数のしきい値が得ら
れた場合は、周囲長の計算誤差が考えられる。計算誤差
の要因としては、２値化を行うための２値化しきい値が
ズレている。または、計算を行うための画像の画素数が
不足しているなどが考えられる。前者の場合は、最適な
２値化しきい値を見つけることでより実際に近い周長値
が得られる。後者の場合は、カメラの台数を増やすなり
して画素数を増やす必要がある。しかし、システム上カ
メラ数を増やすことが難しい場合や２値化しきい値調整
しても良い結果が得られない場合は、システム全体とし
て分別できる形状係数のしきい値を再実験によって確認
する必要がある。また、周囲長の計算アルゴリズムを変
更するのも一つの方法である。First, a method of determining the width of the shape factor threshold will be described with reference to FIG. Although the above factors are considered as factors of the error of the shape factor, it was found that the error of the shape factor due to the measurement error of the perimeter is a major factor.
Therefore, FIG. 2 shows a simulation of the change value of the shape factor due to the measurement error of the perimeter. As the simulation sample due to the error of the peripheral length, the carbide foreign matter was triangular, 1/2 square, and 1/3 square, and the hair foreign matter was 1/4 square. As the perimeter measurement error range, the perimeter is -10%, -5%, theoretical value,
The simulation was performed with 5 points of + 5% and + 10%.
As a result, it was found that the threshold value of the shape factor can be drawn between the 1/4 square, which is an assumed sample of foreign matter in hair, and the triangle, which is an assumed sample of foreign matter in carbide. Further, when an error of the perimeter occurs in the range of −10% to + 10%, the error as the shape coefficient, that is, the range of the shape coefficient is expressed by the following equation (2). 1.5 ≦ threshold of shape factor ≦ 2.3 (2) Further, when the threshold of the shape factor that does not satisfy the expression (2) is obtained, the calculation error of the perimeter may be considered. As a factor of the calculation error, the binarization threshold for binarization is deviated. Alternatively, it is possible that the number of pixels of the image for calculation is insufficient. In the former case, a perimeter value closer to the actual value can be obtained by finding the optimum binarization threshold value. In the latter case, it is necessary to increase the number of pixels as the number of cameras increases. However, if it is difficult to increase the number of cameras on the system or if good results cannot be obtained by adjusting the binarization threshold, it is necessary to confirm the shape factor threshold that can be sorted for the entire system by re-experimentation. is there. Also, changing the calculation algorithm of the perimeter is one method.
【００２５】次ぎに、本発明者は簡単な形状の炭化物異
物、毛髪異物を想定しシュミレーションテスト及び検査
装置で実際の炭化物異物、毛髪異物を測定してサンプル
テストを行い形状係数のしきい値の決定を行った。以下
にシュミレーションテスト及びサンプルテストの結果を
図３及び図４を用いて簡単な説明を行う。Next, the inventor of the present invention assumes a simple foreign material such as a carbide foreign material and a hair foreign material, measures the actual carbide foreign material and hair foreign material with a simulation test and inspection device, and performs a sample test to determine the threshold value of the shape factor. Made a decision. The results of the simulation test and the sample test will be briefly described below with reference to FIGS. 3 and 4.
【００２６】まず、シュミレーションテストの結果を示
す。図３のシュミレーションでは、従来区別が困難であ
った縦横比の同じもので炭化物異物及び毛髪異物の想定
した。炭化物異物としては、ブツ１〜４に示すように四
角、丸、三角の４種類の炭化物異物を想定し、毛髪異物
としては、毛髪１〜５に示すように毛髪の細長く、形状
が複雑なものを５種類の毛髪異物を想定して計９つの想
定サンプルから式（１）の形状係数を求めた。図３の形
状係数の比較表からも分かるように、２．１付近を境界
として、ブツ１〜４と毛髪５〜９とを分別することがで
き、形状係数のしきい値が決定できそうなことが分かっ
た。First, the results of the simulation test will be shown. In the simulation of FIG. 3, it was assumed that the foreign matter was carbide and the foreign matter was hair with the same aspect ratio, which was difficult to distinguish in the past. As the carbide foreign substances, four types of carbide foreign substances, such as square, circle, and triangle are assumed as shown in items 1 to 4, and the hair foreign substances are long and complicated hairs as shown in hairs 1 to 5. The shape factor of the formula (1) was calculated from a total of 9 assumed samples assuming 5 kinds of hair foreign substances. As can be seen from the shape factor comparison table of FIG. 3, it is possible to separate the spots 1 to 4 and the hairs 5 to 9 with the vicinity of 2.1 as the boundary, and to determine the threshold value of the shape factor. I found out.
【００２７】次に、サンプルテストの結果を簡単に示
す。図４のサンプルテストでは、実際の炭化物異物の１
１サンプルと、実際の毛髪異物の９サンプル、２０サン
プルでサンプルテストを行った。図４の形状係数の比較
表に示すように、形状係数のしきい値は、２．２で形状
係数のしきい値が決定でき、毛髪異物と炭化物異物とが
分別可能な事が分かった。そこで、検査装置の形状係数
のしきい値を２．２と決定した。Next, the result of the sample test will be briefly described. In the sample test of Fig. 4, 1 of the actual carbide foreign substances
A sample test was performed on 1 sample and 9 and 20 samples of actual hair foreign substances. As shown in the shape factor comparison table of FIG. 4, it was found that the threshold value of the shape factor can be determined at 2.2, and the foreign matter of hair and the foreign matter of carbide can be distinguished. Therefore, the threshold value of the shape factor of the inspection device is determined to be 2.2.
【００２８】また、本発明の要旨である形状係数は、炭
化物異物または毛髪異物の周囲長及び面積により決定す
るため、式（１）の逆数である形状係数は式（１）’で
も問題なく、それに伴い形状係数のしきい値も式
（２）’の範囲内で決定することが必要である。Further, since the shape factor which is the gist of the present invention is determined by the peripheral length and area of the carbide foreign substance or hair foreign substance, the shape factor which is the reciprocal of the formula (1) can be expressed by the formula (1) 'without any problem. Accordingly, it is necessary to determine the shape factor threshold value within the range of the equation (2) ′.
【００２９】[0029]
【発明の効果】以上説明したように、本発明を用いる事
により、毛髪異物は毛髪異物、炭化物異物は炭化物異物
と分別しながら検査が行えるため、検査工数を抑さえな
がら毛髪流出防止が行える。As described above, by using the present invention, the hair foreign matter and the carbide foreign matter can be inspected while being separated from the carbide foreign matter, so that the hair outflow can be prevented while suppressing the inspection man-hours.
【００３０】[0030]
【図１】本発明に係わる透明あるいは半透明のフィルム
又はシートの炭化物異物と毛髪異物の区別が可能な異物
検査装置を示す構成説明図FIG. 1 is a structural explanatory view showing a foreign matter inspection device capable of distinguishing a carbide foreign matter and a hair foreign matter of a transparent or translucent film or sheet according to the present invention.
【図２】形状係数しきい値の幅のシュミレーション説明
図FIG. 2 is an explanatory diagram of a simulation of a width of a shape factor threshold value.
【図３】想定の毛髪異物及び炭化物異物でのシュミレー
ションテスト説明図[Fig. 3] Explanatory drawing of a simulation test using an assumed hair foreign substance and a carbide foreign substance.
【図４】実際の毛髪異物及び炭化物異物でのサンプルテ
スト説明図FIG. 4 Explanatory drawing of sample test with actual hair foreign substances and carbide foreign substances
１ 検査シート ２ 照明装置 ３ ＣＣＤカメラ ４ 欠陥検出画像処理装置 ５ 分類結果表示端末 ６ 警報装置 ７ａ ニップロール ７ｂ ニップロール 1 inspection sheet 2 lighting equipment 3 CCD camera 4 Defect detection image processing device 5 Classification result display terminal 6 Alarm device 7a Nip roll 7b nip roll
Claims (10)
前記フィルム又はシートを撮影して画像データを取り、
撮像装置で得られた画像データから輝度の変化部位を検
出し、前記フィルム又はシート中の異物を判別し、該異
物の周長及び面積とから異物の形状係数を算出して該異
物の種類を分別することを特徴とする異物検査方法。1. A film or sheet is irradiated with inspection light,
Take the image data by shooting the film or sheet,
Detecting a changed portion of brightness from image data obtained by the image pickup device, determining a foreign substance in the film or sheet, calculating a shape factor of the foreign substance from the perimeter and area of the foreign substance, and determining the type of the foreign substance. A method for inspecting foreign matter, characterized by separating.
半透明であり、検査光を照射し、照明装置の他方側から
前記フィルム又はシートを撮影して画像データを取るこ
とを特徴とする請求項１記載の異物検査方法。2. The film or sheet is transparent or semi-transparent, is irradiated with inspection light, and the film or sheet is photographed from the other side of the illumination device to obtain image data. Foreign material inspection method.
物の周長とから下記式（１）の形状係数を算出し毛髪異
物と炭化物異物を判別することを特徴とする請求項１及
至２に記載の異物検査方法。 形状係数＝（周囲長２）／（４π×面積の和）…（１）3. A hair foreign substance and a carbide foreign substance are discriminated by calculating a shape factor of the following formula (1) from the foreign substance area value which is a characteristic amount of the foreign substance and the peripheral length of the foreign substance. 2. The foreign matter inspection method described in 2. Shape factor = (perimeter 2 ) / (4π × sum of areas) (1)
（２）の範囲内で決定される形状係数のしきい値以上で
あれば毛髪異物、該しきい値より小さければ炭化物異物
と判別することを特徴とする請求項１及至３のいずれか
に記載の異物検査方法。 １．５≦形状係数のしきい値≦２．３…（２）4. If the calculated shape factor is greater than or equal to the threshold value of the shape factor determined within the range of the following formula (2), it is determined to be hair foreign matter, and if it is smaller than the threshold value, it is determined to be carbide foreign matter. The foreign matter inspection method according to any one of claims 1 to 3, wherein 1.5 ≦ threshold of shape factor ≦ 2.3 (2)
物の周長とから下記式（１）’の形状係数を算出し毛髪
異物と炭化物異物を判別することを特徴とする請求項１
及至２に記載の異物検査方法。 形状係数＝（４π×面積の和）／（周囲長２）…（１）’5. A hair foreign substance and a carbide foreign substance are discriminated by calculating a shape factor of the following expression (1) ′ from the foreign substance area value which is a characteristic amount of the foreign substance and the peripheral length of the foreign substance.
The foreign matter inspection method according to 1 to 2. Shape factor = (4π × sum of areas) / (perimeter 2 ) ... (1) ′
（２）’の範囲内で決定される形状係数のしきい値以上
であれば炭化物異物、該しきい値より小さければ毛髪異
物と判別することを特徴とする請求項１及至２、請求項
５のいずれかに記載の異物検査方法。 ０．４４≦形状係数のしきい値≦０．６５…（２）’6. If the calculated shape factor is greater than or equal to the threshold value of the shape factor determined within the range of the following formula (2) ′, it is determined as a carbide foreign substance, and if it is smaller than the threshold value, it is determined as a hair foreign substance. The foreign matter inspection method according to any one of claims 1 to 2 and 5, wherein: 0.44 ≦ threshold of shape factor ≦ 0.65 (2) ′
照明装置と、前記フィルム又はシートを撮影して画像デ
ータを取る撮像装置と、撮像装置で得られた画像データ
から輝度の変化部位を検出し、前記フィルム又はシート
中の異物を判別し、該異物の周長及び面積とから異物の
形状係数を算出して該異物の種類を分別可能な欠陥検出
画像処理装置とを備えたことを特徴とする異物検査装
置。7. An illumination device for irradiating a film or sheet with inspection light, an imaging device for photographing the film or sheet to obtain image data, and detecting a changed portion of brightness from the image data obtained by the imaging device. A defect detection image processing apparatus capable of distinguishing the type of the foreign matter by determining the foreign matter in the film or sheet, calculating the shape factor of the foreign matter from the circumference and area of the foreign matter, Foreign matter inspection device.
半透明であり、検査光を照射する装置と、照明装置の他
方側に配置して前記フィルム又はシートを撮影して画像
データを取ることを特徴とする請求項７記載の異物検査
装置。8. The film or sheet is transparent or semi-transparent, and is arranged on the other side of a device for irradiating inspection light and an illuminating device to photograph the film or sheet to obtain image data. The foreign matter inspection apparatus according to claim 7.
特徴とする請求項７及至８記載の炭化物異物と毛髪異物
の区別が可能な異物検査装置。9. The foreign matter inspection apparatus according to claim 7, wherein the illumination apparatus is diffused illumination, and the foreign matter of carbide and the foreign matter of hair can be distinguished from each other.
元カメラであることを特徴とする請求項７及至８記載の
炭化物異物と毛髪異物の区別が可能な異物検査装置。10. The foreign matter inspection device according to claim 7, wherein the image pickup device is a one-dimensional or two-dimensional camera, and which is capable of discriminating between a carbide foreign substance and a hair foreign substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001233901A JP2003042739A (en) | 2001-08-01 | 2001-08-01 | Foreign matter inspecting method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001233901A JP2003042739A (en) | 2001-08-01 | 2001-08-01 | Foreign matter inspecting method and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003042739A true JP2003042739A (en) | 2003-02-13 |
Family
ID=19065614
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
|---|---|
| JP (1) | JP2003042739A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101330098B1 (en) | 2012-05-10 | 2013-11-18 | 동우 화인켐 주식회사 | Method for discriminating defect of optical films |
-
2001
- 2001-08-01 JP JP2001233901A patent/JP2003042739A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101330098B1 (en) | 2012-05-10 | 2013-11-18 | 동우 화인켐 주식회사 | Method for discriminating defect of optical films |
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