JP2004184126A - Inspection device for cloth piece - Google Patents

Inspection device for cloth piece Download PDF

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Publication number
JP2004184126A
JP2004184126A JP2002348604A JP2002348604A JP2004184126A JP 2004184126 A JP2004184126 A JP 2004184126A JP 2002348604 A JP2002348604 A JP 2002348604A JP 2002348604 A JP2002348604 A JP 2002348604A JP 2004184126 A JP2004184126 A JP 2004184126A
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cloth
inspection
conveyor
defect
inspection apparatus
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JP3813121B2 (en
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Yoshikiyo Kagawa
義清 香川
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Purex Co Ltd
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Purex Co Ltd
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  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Image Input (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To perform a proper level determination without being affected by noise such as wrinkles, texture or the like. <P>SOLUTION: This inspection device for a cloth piece is equipped with a line image sensor and a signal processing part for detecting the flaw of the cloth piece on the basis of the cloth piece detecting signal from the sensor. The signal processing part is equipped with an inspection state memory part for storing the cloth piece detecting signal from the sensor at the beginning of inspection and during inspection and a memory part for storing the line image picked up by the sensor. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、シーツ、カバー等の布片の連続洗濯仕上加工における布片の汚れや破れ等の欠陥を検査する装置に関する。
【0002】
【従来の技術】
従来、布片を水洗、乾燥、アイロン掛けをした後、折り畳むためにベルト上に広げて移動する布片の表面検査をするのに布片面に光を当て、布片面からの反射光をカメラ(またはイメージセンサー)で捕らえて、カメラが捕えた映像の光の強弱(欠陥部は反射光が弱くなる)を電気信号に変え、該電気信号を処理することによって、布片面の破損や汚れ等の欠陥を自動的に検査する布片面の欠陥検査装置はすでに提供されている(特許文献1、2)。
【0003】
【特許文献1】
特開平9−5258号公報
【特許文献2】
特開平8−276100号公報
【0004】
【発明が解決しようとする課題】
しかし、従来の装置では、布片を検知する検知器によって検査を開始・終了するタイミングを取っていたため、センサー不具合時に動作不良となることや、周囲のマスクがセンサーの設置場所により固定になってしまうなど問題があった。また、センサーによる点での有無検査のため、前端または後端は一直線上のマスクしか行えない。
【0005】
また、従来のラインイメージセンサーを用いた検査装置では、検出用の調整を行う場合、静止したコンベア上に欠陥サンプルを置き、検出されたライン状のレベルを確認しながら調整を行っていた。実際には静止状態に比べ、流れている映像では皺や地合などのノイズも含まれることにより、前記調整では誤動作をしてしまう場合が多い。この調整を行うには一枚ずつコンベアに流れているものを調整する必要があるが、同じ欠陥サンプルでもコンベア通過時には一様でないことや高速なために適正なレベルを判断することが難しく正確に行うことは困難であった。
【0006】
さらに、蛍光灯の光量は蛍光灯の温度変化に対して常に変動するため、光量変動補償を行う必要がある。従来の光量変動補償では、映像信号の利得調整によって行うのが一般的であったが、利得調整によって補償すると電気信号ノイズまで増幅してしまうデメリットが存在する。
【0007】
そこで、本発明は、従来の装置の上記諸問題を解決した、布片検査方法および装置を提供することを課題とする。
【0008】
【課題を解決するための手段】
上記課題を解決するために、請求項1の発明は、ラインイメージセンサーと、該センサーからの布片検出信号にもとづいて布片の欠陥を検出する信号処理部を備えた検出装置において、前記信号処理部が、前記センサーからの布片検出信号を、検査開始および検査中として記憶する検査状態記憶部と、前記サンサーが撮像したラインイメージを記憶する記憶部とを備えたことを備えたことを特徴とし、請求項2の発明は、請求項1の発明において、上記記憶部に記憶したラインイメージを表示する表示部を備えたことを特徴とし、請求項3の発明は、請求項2の発明において、表示部が、上記記憶部に欠陥位置情報を表示する表示部であることを特徴とし、請求項4の発明は、請求項1〜3のいずれかの発明において、入力画像レベルをフィードバックして光量の自動調整を行う照明コントローラを備えたことを特徴とし、請求項5の発明は、請求項1〜4のいずれかの発明において、上記信号処理部からの欠陥情報にもとづいて作動するリジェクタを備えたことを特徴とし、請求項6の発明は、請求項5の発明において、上記信号処理部が、後続のホルダー内のリジェクタに対して排出指令を出力することを特徴とし、請求項7の発明は、請求項5記載の布片検査装置において、上記信号処理部が、後続のホルダーに対して欠陥の種類に応じた排出指令を出力することを特徴とする。
【0009】
【作用】
上記構成の本発明の布片検査装置は、洗濯後の布片はロールアイロナで乾燥された後、布片欠陥検出部に移送され、布片欠陥検出部に搬送された布片は、照明灯で照明され、映像をカメラによって撮像しながら移動し、布片の全長を通過させることにより布片の全表面が検査され、検査の終了した布片はホルダー内に取り込まれ、布片折り手段により順次2つ折り、4つ折り、8つ折り、16折り、32折りされる。
【0010】
前記、布片欠陥検出部のカメラにより撮像された映像信号は順次信号処理部に送られ、映像信号を受けた布片欠陥検出部は、欠陥の条件に基づいて決められた設定値と比較して欠陥の有無を判定し、欠陥有りの場合欠陥布片排出部(布片折り手段駆動部)へ信号を送り、汚れ品は8つ折り手段を不作動にし4つ折り状態で、破れ品は32折り手段を不作動にし16折り状態で、次工程に搬送することなくホルダー外に排出し、欠陥の無い正常な布片は良品として搬送されストッカに収納される。
【0011】
【発明の実施の形態】
本発明の布片検査装置は、上記課題を解決するために、以下の構成を備える。
1.映像をライン状に取り込み電気信号に変えるイメージセンサー部(カメラ)
2.回転検出器より信号を受けてカメラへの撮像信号を送り、カメラで撮像されたライン状映像の電気信号を受け連続して数値化し、処理部に転送する入力部
3.入力部より受けた画像データを判別しワークの有無を検出する検査状態記憶部
4.入力部より受けた画像データを記憶部に転送するとともに欠陥レベルと比較し欠陥判定位置情報、種別情報を欠陥状態記憶部に転送する処理部
5.処理部より受けたライン状の画像データを連続して記憶し2次元状態で記憶する記憶部
6.処理部より受けた欠陥位置情報、種別情報を記憶する欠陥状態記憶部
7.欠陥状態記憶部の表示および記憶部の2次元画像を表示する表示部
8.欠陥状態記憶部にある欠陥位置情報、種別情報にもとづいてリジェクト信号を出力する出力部
9.ワーク移動速度を検出する回転検出器
10.ライン状に検査対象部を照明し光量の増減をすることのできる照明部
11.リジェクト信号を受けて対象をリジェクトするリジェクタ
【0012】
さらに、本発明の布片検査装置は、上記構成にもとづき以下の機能を持たせる。
1.イメージセンサーより入力された映像を判定し検査を開始・終了することができ、前後マスク領域においても曲線状に正確に行うこともできるようにする。
2.流れている検査対象を2次元データとして内部に記憶することができる。このデータは流れている検査対象を2次元として取り込んだ形式となっているために欠陥部だけでなく皺や地合などのノイズも同様に含まれたものになっている。そのデータをそのまま入力電気信号の代わりに利用して調整を行うことで、従来の方法に比べ一様なノイズを含む同じデータにもとづいて調整できるので、より正確な調整を短時間で行えるようにする。
3.光量の調整は入力画像にもとづき光量を増減させることで行い、入力光量を一定に保つ機能を有する。光量増減により行うため電気信号ノイズを増幅しないので安定した検査を行うことができるようにする。
【0013】
【実施例】
本発明の詳細を実施例で説明する。本発明はこれらの実施例により限定されるものではない。
【0014】
実施例
図面にもとづいて説明する。
本発明の布片検査装置は、布片欠陥検出部と折り畳み部(ホルダー)とで構成されており、その詳細な構成及び作動は以下のとおりである。
【0015】
布片欠陥検出部
本発明の、布片欠陥検出部は、図1、図3に示すように、ベルト上に広がった布片の検査対象部位を照明する照明装置(2)と、ベルトと布片の間に敷いて布片の検査を容易にするための検査台(4)と、ベルトの上方にあって検査台上の布片を撮像して電気信号に変えるカメラ(1)と、カメラ(1)からの入力信号または記憶部に記憶されている情報にもとづいて、光源の劣化、温度変化による光量低下を、入力画像レベルをフィードバックして光量の自動調整を行う照明コントローラ(26)への作動信号を発信し、欠陥検出設定と対比し判別された不良品の種類に対応した信号を、欠陥位置記憶部(24)に発信する処理部(21)と、ライン状の信号を連続して記憶し2次元状態に画像情報を記憶している記憶部(22)と、検査を実行しているか停止しているかを記憶する検査状態記憶部(23)と、検出した欠陥(汚れ、破れ)の情報を記憶する欠陥位置記憶部(24)と、取り込み写真情報や判定結果を表示する表示手段(CRT)とで構成された表示部(27)と、検査対象の移動速度を検出する回転検出器(3)と、で構成されており、検査状態記憶部(23)が検査実行中になると、欠陥検出設定にしたがって欠陥判定を行い、検査実行中に欠陥を検出すると、欠陥位置記憶部(24)に欠陥情報を記憶し、検査状態記憶部(24)が検査停止中になったとき、欠陥位置記憶部(24)の情報によって汚れまたは破れ信号を信号出力する。
【0016】
折り畳み部(ホルダー)
上記折り畳み部は図1、図2に示すように、アイロナーから送られてきた布片をスタッカーに搬送する複数のコンベアからなるコンベア装置と、コンベア装置中に配設された複数の布片折り手段と、不良品を排出する不良品排出手段と、良品を収納するスタッカーとで構成されている。
【0017】
上記折り畳み部において布片を搬送するコンベア装置は、
ロールアイロナコンベア(12)から布片を受け取り、プレス済みの布片をホルダー内に取り込むコンベアA(ホルダーコンベア)と、
コンベアAの前方に延設され、走行方向をコンベアAと同一方向と反対方向に切替え可能なコンベアBと、
コンベアAの下部に配設され、コンベアBの走行方向の切替によって送り込まれた2つ折り状態の布片を、コンベアAの下面とで挟持して搬送するコンベアBと、
コンベアBの下部に配設され、4つ折り手段(6)で押し込まれた布片をコンベアBの下面とで4つ折り状態の布片を挟持して搬送するコンベアCと、
コンベアCの延長線上に設けられ、搬送方向に平行に所定の間隙を設けて配置され、走行停止切換可能な一対のコンベアC、Cと、
コンベアCの下方にコンベアCと直交して配設され、受け取り部がコンベアC、C間の間隙に位置し、8つ折り手段(7)によって押し込まれた8つ折り状態の布片を挟持して搬送するコンベアD、Dと、
コンベアD、Dの下方に搬送方向を90度変換して配設し、中途部に16折り手段(8)を備えるコンベアDと、コンベアDの上方に配設され、32折り手段により押し込まれた32折り状態の布片を挟持してスタッカ装置に搬送するコンベアE、Eと、
で構成されている。
【0018】
上記コンベア装置中に配設された布片折り手段は、
ロールアイロナーコンベア(12)によって送られてきた布片がコンベアAとコンベアBの境界部に中間部が達した時、折り畳み信号にもとづいてコンベアBの走行方向を反転させ、布片の中間部をコンベアAとコンベアBとの間に引き込むことにより布片を2つ折りする2つ折り手段(5)と、
コンベアAとコンベアBとの重合終端部に対向して設けられ、コンベアAとコンベアBとにより挟持搬送されてきた2つ折り状態の布片の中間部をコンベアBとコンベアCの間に突き込み動作し、2つ折り状態の布片を4つ折りにする4つ折り手段(6)と、
一対のコンベアC、Cの間隙部の上方に配置され、コンベアC、Cの走行の停止と同時に作動して4つ折り状態の布片をコンベアDとコンベアDの間に突き込み動作する8つ折りする8つ折り手段(7)と、
コンベアDの中途部に配置され、8つ折り状態の布片の先端部を保持し、後端の通過を待ち、後端の通過と同時に開放することで16折りする16折り手段(8)と、
コンベアDの終端部に配置され、搬送されてきた16折り状態の布片の先端部を通過させ中間部をコンベアEとコンベアEの間に突き込み動作し16つ折り状態の布片を32折りする32折り手段(9)と、
で構成されている。
【0019】
上記スタッカは、コンベアEの終端部に配置され、一対の板を開くことにより32折りの布片(良品)を落下させて積み重ねるスタッカと、コンベアEの終端部に配置されスタッカ板を不動作にすることで32折り布片をホルダー外へ排出させる排出口開平板(11)とで構成されている。
【0020】
図4により、布片の欠陥を検査する場合の布片欠陥検出部の処理を説明する。
カメラからの情報により、入力画像よりライン状データを逐次転送する(S1)。送られてくる布片のエッジ検出し(S2)、エッジを検出した場合は検査を続行する(S3)、エッジを検出しない場合は、ステップS9へ。
エッジを検出した場合は検査状態を続行(S3)し、記憶部にライン状データを転送し(S4)、記憶部に情報をライン状2次元画像データとして記憶する。
画像情報により基準光量に合わせ(S5)、照明コントローラの光量を指示された光量に変更する。設定に基づいて判定し(S6)、欠陥有りの場合には欠陥位置記憶部に欠陥位置情報を記憶し(S8)ステップS1に戻り、欠陥無しの場合にはステップS1に戻る(S7)。ステップS2でエッジ検出しない場合には、検査中かどうか判定し(S9)、検査中の場合には表示部に位置情報を表示し(S10)、検査中でない場合にはステップS1へ戻る。欠陥位置の有無を判定し(S11)、欠陥位置有りの場合にはリジェクタ(28)へ欠陥信号出力し(S12)た後、待機中になりステップS1へ戻り、欠陥位置なしの場合には待機中になりステップS1へ戻る(S13)。
以下上記処理を繰り返す。
【0021】
設定
検査対象となる欠陥サンプルを検出させる為には、該検査装置に欠陥に応じた感度設定を行う必要があり、この設定は以下のように行う。
1.欠陥サンプルをコンベア上を通過させて検査を行う。(この時2次元データが記憶される)
2.任意の検出設定を指示し先に記憶した2次元データを利用して検査させる。(この時欠陥サンプルを流す代わりに2次元データを用いるように装置に指定してあればカメラから入力せずに記憶部から入力する)
3.表示された欠陥位置情報と写真画像の欠陥位置が一致するように検出設定を変更し再度2.〜3.を繰り返す。
4.欠陥位置が写真画像の欠陥位置と一致していれば、欠陥サンプルに対しての検出設定が確定される。
【0022】
上記≪設定≫の詳細を説明する。
図5により記憶部に記憶されているライン状2次元画像にもとづいて調整する場合の布片欠陥検出部の処理を説明する。
記憶部に記憶されているライン状2次元画像データを入力部に入力し、入力部は入力された入力画像よりライン状データを順次次ステップに転送する(S21)。送られてくるライン状データにもとづき布片のエッジ検出し(S22)、エッジを検出した場合は検査を続行する(S23)、エッジを検出しない場合は、ステップS27へ。エッジを検出した場合は検査状態を続行(S23)し、設定にもとづいて欠陥の有無の判定を行い(S24)、判定結果が欠陥有り場合には欠陥位置記憶部に欠陥位置データを記憶(S26)しステップ21に戻り、欠陥無しの場合にはステップS21に戻る(S25)。
ステップS22でエッジ検出しない場合には、検査中かどうか判定し(S27)、検査中の場合には表示部に位置情報を表示(S29)し、検査状態記憶部を待機中にし(S29)ステップ21へ戻り、検査中でない場合には直ちにステップS21へ戻る。
【0023】
全体の作動
次に、図6により、上記構成の布片欠陥検出装置の作動を説明する。
1.ホルダーに布片が搬入されると、入力された画像データを判別して検査状態記憶部がワーク有りとなる。
2.検査状態記憶部がワーク有りになると検査を開始し、搬入された布片の汚れおよび破れを検査し、検査状態記憶部がワーク無しになると検査を終了し欠陥位置記憶部の情報によって汚れまたは破れ信号を出力する。
3.汚れを検出した時は8つ布片折り手段に対して不動作信号を発信し、破れを検出した時は32布片折り手段とスタッカに対して不作動信号を発信する。
【0024】
上記構成のホルダーは、以下に説明するように、アイロナーから送られてきた布片を折り畳むと同時に、信号処理部からの信号にもとづいて良品と不良品とに分け、さらに、不良品を汚れ品と破れ品との分け、それぞれ所定の排出個所に排出する。
1.回転検出器と入力画像データとにより布片の長さと移動速度と位置を計測する。(搬入工程)
2.計測された布片の長さと移動速度により布片を2つ折りさせるタイミングで2つ布片折り手段を突き込み動作させるとともにコンベアBを反転させてコンベアAとコンベアBの間に布片を送り込み2つ折りにする。(2つ折り工程)
3.2つ折りにした布片をコンベアAとコンベアBで挟持して4つ折り手段(6)に供給する。(搬送工程)
4.コンベアAとコンベアBの後端部より布片が供給され、4つ布片折り手段(6)とコンベアCの間に垂れ下がる2つ折りされた布片を、さらに2つ折りさせるタイミングでコンベアBとコンベアCの間に突き込み動作し2つ折り状態の布片を4つ折りする。(4つ折り工程)
5.4つ折りされた布片をコンベアCとコンベアCで8つ折り手段(7)に供給する。(搬送工程)
6.4つ折り装置から供給された布片のうち良品は、8つ折り手段(7)によりコンベアDとコンベアDの間に突き込み動作し4つ折り状態の布片を8つ折りし、コンベアDに供給し、汚れ品は、信号処理部からの信号によって本装置は不作動に制御され、ホルダーの外側に4つ折り状態で排出させる。(8つ折り工程)
7.8つ折りされた布片をコンベアDの中途部にある16折り手段(8)に供給する。(搬送工程)
8.8つ折りされた布片の先端を上下方向に動作する16折り板を上方に動かし、その上方にある押さえ板とで先端を保持し、後端の通過を待ち後端の通過と同時に保持を開放することで16折りする。(16折り工程)
9.16折りされた布片をコンベアDの後端部にある32折り装置に供給する。(搬送工程)
10.16折り手段(8)から供給された布片のうち良品は、32布片折り手段(9)によりコンベアEとコンベアEの間に突き込み動作し16折り状態の布片を32折りし、破れ品は、信号処理部からの信号によって本装置は不動作に制御され、ホルダーの外側に16折り状態で排出させる。(32折り工程)
11.32折りされた布片をコンベアEとコンベアEで狭持してスタッカに供給する。(搬送工程)
12.一対のスタッカ板(10)を開くことにより32折り布片(良品)を落下させて積み重ね、汚れ品は、信号処理部からの信号にもとづき排出口開平板(11)を開きスタッカ板(10)を不動作にすることでホルダーの外側に32折り状態で排出させる。(ストック工程)
【0025】
なお、上記実施例では、2つ折り工程でコンベアBを反転させてコンベアAとコンベアBの間に布片を送り込むようにしたが、コンベアBを反転させずそのままホルダーの外側に排出するようにしてもよい。
なおまた、上記実施例は、ホルダーのコンベア装置中で不良品の排出を行うべく構成したが、アイロナーからホルダーへ移送するコンベアに排出装置(リジェクタ(28))を設け、不良品を排出するようにしても良い。
【0026】
【発明の効果】
上記構成の本件発明は次のような効果を期待することができる。
イメージセンサーより入力された映像を判定し検査を開始・終了することができるので、前後マスク領域においても曲線状に正確に行うこともできる。
周囲に正確なマスクが行える。(従来、前端・後端方向はライン状に切断される)
布片検知器を使用しないので機器トラブルが生じにくい。
欠陥位置の表示機能により検査状態の確認が容易である。
【0027】
流れている欠陥サンプルを2次元データとして内部に記憶することができ、このデータは流れている欠陥サンプル2次元として取り込んだ形式となっているために皺や地合などのノイズも同様に含まれたものになっており、そのデータをそのまま再利用して調整を行うことで、従来の方法に比べ一様なノイズを含む同じデータにもとづいて調整できるので、速く簡単に適正な調整を行え、また、検出目的に合った調整を簡単正確に行えるため、装置の欠陥検出の信頼性を増す。
【0028】
光量不足に対して入力画像にもとづき光量を増減させることで行うので、入力光量を一定に保つ機能を有する。光量増減により行うためノイズを増幅しないので安定した検査を行うことができ、色の付いたワーク(布片)でも光量調整が行われ、検査が可能であり、しかも、自動光量調整のため、メンテナンスが容易である。
【図面の簡単な説明】
【図1】布片検査装置の正面図である。
【図2】布片検査装置の側面図である。
【図3】布片検査装置の信号処理部のブロック図である。
【図4】信号処理部の検査状態持のフローチャート図である。
【図5】信号処理部の調整状態持のフローチャート図である。
【図6】作動状態説明図である。
【符号の説明】
1 カメラ
2 照明装置
3 回転検出器
4 検査台
5 2つ折り手段
6 4つ折り手段
7 8つ折り手段
8 16折り手段
9 32折り手段
10 スタッカー板
11 排出孔開閉板
12 ロールアイロナーコンベア
20 入力部
21 処理部
22 記憶部
23 検査状態記憶部
24 欠陥位置記憶部
25 出力部
26 照明コントローラ部
27 表示部
28 リジェクタ
〜E ホルダーコンベア
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for inspecting a cloth piece for defects such as dirt and tear in a continuous washing and finishing process of a cloth piece such as a sheet or a cover.
[0002]
[Prior art]
Conventionally, a cloth piece is washed with water, dried, and ironed, then spread on a belt to be folded, and the surface of the moving cloth piece is inspected. Or the image sensor), converts the intensity of the light of the image captured by the camera (the reflected light becomes weaker at the defective part) into an electric signal, and processes the electric signal to prevent damage to the one side of the cloth, dirt, etc. A cloth surface defect inspection apparatus for automatically inspecting for defects has already been provided (Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP-A-9-5258 [Patent Document 2]
JP-A-8-276100
[Problems to be solved by the invention]
However, in the conventional equipment, the inspection was started and ended by the detector that detects the piece of cloth, which caused malfunctions in the event of sensor failure, and the surrounding mask became fixed depending on the sensor installation location. There were problems such as getting lost. Further, since the presence or absence of a point is detected by a sensor, the front end or the rear end can perform only a straight mask.
[0005]
Further, in the inspection apparatus using the conventional line image sensor, when performing the adjustment for detection, the defect sample is placed on a stationary conveyor, and the adjustment is performed while confirming the detected linear level. Actually, compared to the stationary state, the moving image often includes noises such as wrinkles and formations, so that the adjustment often causes a malfunction. To make this adjustment, it is necessary to adjust what is flowing on the conveyor one by one.However, even the same defective sample is not uniform when passing through the conveyor and it is difficult to judge the appropriate level because of the high speed. It was difficult to do.
[0006]
Further, since the light amount of the fluorescent lamp always changes with the temperature change of the fluorescent lamp, it is necessary to perform light amount fluctuation compensation. The conventional light amount fluctuation compensation is generally performed by adjusting the gain of the video signal. However, when the compensation is performed by the gain adjustment, there is a disadvantage that electric signal noise is amplified.
[0007]
Therefore, an object of the present invention is to provide a cloth inspection method and apparatus which solve the above-mentioned problems of the conventional apparatus.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a detection apparatus comprising: a line image sensor; and a signal processing unit that detects a defect of the cloth based on a cloth detection signal from the sensor. The processing unit includes an inspection state storage unit that stores the cloth detection signal from the sensor as an inspection start and during an inspection, and a storage unit that stores a line image captured by the sensor. According to a second aspect of the present invention, in the first aspect of the present invention, a display unit for displaying the line image stored in the storage unit is provided, and the third aspect of the present invention is the second aspect of the present invention. Wherein the display section is a display section for displaying defect position information in the storage section. The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the input image level is filtered. The invention according to claim 5 is characterized by comprising an illumination controller for performing automatic adjustment of the light amount by performing feedback and operating based on defect information from the signal processing unit according to any one of claims 1 to 4. The invention according to claim 6 is characterized in that the signal processing unit outputs a discharge command to a subsequent rejector in a holder. According to a seventh aspect of the present invention, in the cloth inspection apparatus according to the fifth aspect, the signal processing unit outputs a discharge command to a subsequent holder in accordance with a type of the defect.
[0009]
[Action]
In the cloth inspection apparatus of the present invention having the above structure, the cloth after washing is dried by a roll ironer, then transferred to a cloth defect detection unit, and the cloth conveyed to the cloth defect detection unit is illuminated by an illumination lamp. It is illuminated, moves while capturing the image by the camera, and passes through the entire length of the cloth piece to inspect the entire surface of the cloth piece.The inspected cloth piece is taken into the holder, and sequentially by the cloth folding means. It is folded in two, four, eight, sixteen, and thirty-two.
[0010]
The video signal imaged by the camera of the cloth defect detection unit is sequentially sent to the signal processing unit, and the cloth defect detection unit that receives the video signal compares the image signal with a set value determined based on the defect condition. To determine the presence or absence of a defect. If there is a defect, a signal is sent to the defective cloth discharge unit (cloth folding means driving unit). With the means deactivated, the sheet is discharged out of the holder without being conveyed to the next process in the 16-fold state, and a normal piece of cloth without defects is conveyed as a non-defective product and stored in a stocker.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
A cloth piece inspection apparatus of the present invention has the following configuration in order to solve the above problems.
1. Image sensor (camera) that captures images in a line and converts them into electrical signals
2. 2. An input unit that receives a signal from the rotation detector, sends an imaging signal to the camera, continuously receives an electric signal of a linear video image captured by the camera, digitizes the electrical signal, and transfers it to a processing unit. 3. Inspection state storage section for determining image data received from the input section and detecting the presence or absence of a work. 4. A processing unit that transfers the image data received from the input unit to the storage unit, compares the image data with the defect level, and transfers the defect determination position information and the type information to the defect state storage unit. 5. A storage unit for continuously storing the linear image data received from the processing unit and storing the image data in a two-dimensional state. 6. A defect state storage unit that stores defect position information and type information received from the processing unit. 7. Display unit for displaying the defect state storage unit and displaying the two-dimensional image of the storage unit 8. An output unit that outputs a reject signal based on defect position information and type information stored in the defect state storage unit. 9. Rotation detector for detecting work moving speed 10. Illumination unit that can illuminate the inspection target unit in a line shape and increase or decrease the amount of light. Rejector that receives a reject signal and rejects an object
Further, the cloth inspection apparatus of the present invention has the following functions based on the above configuration.
1. An image input from an image sensor can be determined and inspection can be started / terminated, and accurate and curved inspection can be performed even in front and rear mask areas.
2. The flowing test object can be stored internally as two-dimensional data. Since this data is in a format in which the flowing inspection object is captured as two-dimensional, it includes not only a defective portion but also noise such as wrinkles and formations. By using the data as it is instead of the input electric signal and making adjustments, it is possible to make adjustments based on the same data containing uniform noise compared to the conventional method, so that more accurate adjustments can be made in a shorter time I do.
3. The light amount is adjusted by increasing or decreasing the light amount based on the input image, and has a function of keeping the input light amount constant. Since the electric signal noise is not amplified because the light amount is increased or decreased, a stable inspection can be performed.
[0013]
【Example】
The details of the present invention will be described with reference to examples. The present invention is not limited by these examples.
[0014]
A description will be given based on the drawings of the embodiments.
The cloth inspection apparatus according to the present invention includes a cloth defect detection section and a folding section (holder), and the detailed configuration and operation thereof are as follows.
[0015]
Cloth defect detection section
As shown in FIGS. 1 and 3, the cloth defect detecting section of the present invention is provided between the belt and the cloth, with an illuminating device (2) for illuminating an inspection target portion of the cloth spread on the belt. An inspection table (4) for facilitating inspection of the cloth pieces, a camera (1) above the belt, which images the cloth pieces on the inspection table and converts them into electric signals, and a camera (1). Based on an input signal or information stored in a storage unit, an operation signal is transmitted to a lighting controller (26) for automatically adjusting a light amount by feeding back an input image level for a light amount deterioration due to a light source deterioration and a temperature change. A processing unit (21) for transmitting a signal corresponding to the type of the defective product determined in comparison with the defect detection setting to a defect position storage unit (24); A storage unit (22) storing image information in a state, and an inspection Inspection status storage unit (23) for storing whether it is running or stopped, defect position storage unit (24) for storing information on detected defects (dirt, tear), and display of captured photo information and judgment results (CRT), and a rotation detector (3) for detecting the moving speed of the inspection target. The inspection state storage unit (23) executes the inspection. In the middle, the defect is determined in accordance with the defect detection setting. If a defect is detected during the execution of the inspection, the defect information is stored in the defect position storage unit (24), and the inspection state storage unit (24) stops the inspection. Then, a dirt or tear signal is output as a signal based on the information in the defect position storage section (24).
[0016]
<< Folding part (holder) >>
As shown in FIGS. 1 and 2, the folding unit includes a conveyor device including a plurality of conveyors that convey a cloth piece sent from an ironer to a stacker, and a plurality of cloth piece folding means disposed in the conveyor device. And a defective product discharging means for discharging defective products, and a stacker for storing non-defective products.
[0017]
The conveyor device for transporting the piece of cloth in the folding section,
Conveyor A (holder holder conveyor) which receives the cloth pieces from the roll ironer conveyor (12) and takes in the pressed cloth pieces into the holder;
Extends in front of the conveyor A, the running direction and the conveyor A and the same direction as the conveyor B 1 can be switched to the opposite direction,
Is arranged in a lower portion of the conveyor A, the piece of cloth folded state of being fed by the switching of the running direction of the conveyor B 1, a conveyor B 2 for transporting and sandwiched between the lower surface of the conveyor A,
Is arranged in a lower portion of the conveyor B 2, the conveyor C 1, which fabric piece is pushed to transport by sandwiching a piece of cloth fourfold state between the lower surface of the conveyor B 2 in quarto means (6),
A pair of conveyors C 2 , C 2, which are provided on an extension of the conveyor C 1 , are arranged with a predetermined gap in parallel with the transport direction, and can switch traveling stop;
The lower conveyor C 2 perpendicular to the conveyor C 2 is arranged to receive part is positioned in the gap between the conveyors C 2, C 2, a piece of cloth 8 folded state of being pressed by the 8-fold means (7) Conveyors D 1 , D 2 for pinching and conveying;
A conveyor D 3 is provided below the conveyors D 1 and D 2 with the conveyance direction changed by 90 degrees and provided with a 16-fold means (8) in the middle, and a 32-fold means provided above the conveyor D 3. Conveyors E 1 , E 2 , which sandwich the 32-folded cloth pieces pushed by the conveyor and convey them to the stacker device;
It is composed of
[0018]
Cloth folding means disposed in the conveyor device,
When the cloth piece sent by a roll ironer conveyor (12) is an intermediate section has reached the boundary of the conveyor A and the conveyor B 1, to reverse the running direction of the conveyor B 1 on the basis of the folding signals, the cloth a twofold means for the cloth folded by pulling the middle portion between the conveyor a and the conveyor B 1 (5),
Provided opposite to the polymerization terminal end of the conveyor A and the conveyor B 2, while the intermediate portion of the piece of cloth folded state has been nipped and conveyed by the conveyor A and the conveyor B 2 of the conveyor B 2 and the conveyor C 1 A four-fold means (6) for squeezing the two-folded cloth piece into four,
It is disposed above the gap between the pair of conveyors C 2 , C 2 , operates simultaneously with the stop of the traveling of the conveyors C 2 , C 2 , and pushes the four-fold folded piece of cloth between the conveyors D 1 and D 2. An eight-fold means (7) for folding in eight pieces,
Is disposed midway of the conveyor D 3, it holds the leading end portion of the piece of cloth 8 folded state, waiting for the passage of the rear end, 16 folding means 16 fold by opening passage of the trailing edge at the same time and (8) ,
Is disposed at the end of the conveyor D 3, the cloth piece pick narrowing operation 16 folded state between the conveyors E 1 and an intermediate portion is passed through the tip of the piece of cloth 16 folded state has been conveyor E 2 32 folding means (9) for 32 folding,
It is composed of
[0019]
Said stacker is positioned at the end of the conveyor E 2, and stacker stacking by 32 fold cloth of the (good) is dropped by opening the pair of plates, it is arranged at the end of the conveyor E 2 a stacker plate not The discharge opening flat plate (11) that discharges the 32 folded cloth pieces out of the holder by operating.
[0020]
With reference to FIG. 4, the processing of the cloth defect detecting unit when inspecting the cloth for defects will be described.
Line data is sequentially transferred from an input image according to information from a camera (S1). The edge of the sent cloth is detected (S2). If an edge is detected, the inspection is continued (S3). If no edge is detected, the process proceeds to step S9.
When an edge is detected, the inspection state is continued (S3), the linear data is transferred to the storage unit (S4), and the information is stored in the storage unit as linear two-dimensional image data.
According to the image information, the light quantity is adjusted to the reference light quantity (S5), and the light quantity of the illumination controller is changed to the designated light quantity. The determination is made based on the setting (S6). If there is a defect, the defect position information is stored in the defect position storage unit (S8), and the process returns to step S1. If there is no defect, the process returns to step S1 (S7). If edge detection is not performed in step S2, it is determined whether or not inspection is being performed (S9). If inspection is being performed, position information is displayed on the display unit (S10). If inspection is not being performed, processing returns to step S1. The presence or absence of a defect position is determined (S11). If there is a defect position, a defect signal is output to the rejector (28) (S12). After that, the process is on standby and returns to step S1, and if there is no defect position, on standby. It becomes middle and returns to step S1 (S13).
Hereinafter, the above processing is repeated.
[0021]
Setting
In order to detect a defect sample to be inspected, it is necessary for the inspection apparatus to perform sensitivity setting according to the defect, and this setting is performed as follows.
1. Inspection is performed by passing the defective sample on a conveyor. (At this time, two-dimensional data is stored.)
2. An arbitrary detection setting is instructed, and inspection is performed using the two-dimensional data stored earlier. (At this time, if the device is specified to use two-dimensional data instead of flowing the defect sample, input from the storage unit without inputting from the camera)
3. 1. Change the detection setting so that the displayed defect position information matches the defect position of the photographic image, and ~ 3. repeat.
4. If the defect position matches the defect position of the photographic image, the detection setting for the defect sample is determined.
[0022]
The details of the {setting} will be described.
The processing of the cloth defect detecting unit when the adjustment is performed based on the linear two-dimensional image stored in the storage unit will be described with reference to FIG.
The linear two-dimensional image data stored in the storage unit is input to the input unit, and the input unit sequentially transfers the linear data from the input image to the next step (S21). The edge of the cloth piece is detected based on the sent line data (S22). If an edge is detected, the inspection is continued (S23). If no edge is detected, the process proceeds to step S27. If an edge is detected, the inspection state is continued (S23), and the presence or absence of a defect is determined based on the setting (S24). If the determination result indicates a defect, the defect position data is stored in the defect position storage unit (S26). Then, the process returns to step 21, and if there is no defect, the process returns to step S21 (S25).
If the edge is not detected in step S22, it is determined whether or not the inspection is being performed (S27). If the inspection is being performed, the position information is displayed on the display unit (S29), and the inspection state storage unit is set to the standby state (S29). Returning to step S21, if the inspection is not being performed, the process immediately returns to step S21.
[0023]
Overall operation
Next, the operation of the cloth defect detecting device having the above configuration will be described with reference to FIG.
1. When the piece of cloth is carried into the holder, the input image data is determined, and the inspection state storage unit indicates that there is a work.
2. Inspection starts when the inspection state storage section has a work, and inspects the carried cloth for dirt and torn. When the inspection state storage section has no work, the inspection is terminated and the inspection is completed according to the information in the defect position storage section. Output a signal.
3. When a stain is detected, an inoperative signal is transmitted to the eight cloth folding means, and when a tear is detected, an inactive signal is transmitted to the 32 cloth folding means and the stacker.
[0024]
As described below, the holder configured as described above folds a piece of cloth sent from the ironer, and at the same time, divides the defective piece into a non-defective one based on a signal from the signal processing unit. And broken products, and each is discharged to a predetermined discharge point.
1. The length, the moving speed, and the position of the piece of cloth are measured based on the rotation detector and the input image data. (Loading process)
2. The Nunohen reversing the conveyor B 1 with operating narrowing butted two cloth folding means at a timing for the cloth folded by the length and the moving speed of the measured fabric piece between the conveyor A and the conveyor B 1 Fold it into two. (Folding process)
The piece of cloth was 3.2 fold supplied to quarto means is sandwiched between (6) in the conveyor A and the conveyor B 2. (Transportation process)
4. Cloth from the rear end of the conveyor A and the conveyor B 2 is supplied, four cloth folding means (6) and 2-folded piece of cloth hanging between the conveyor C 1, conveyor B at the timing of further Folded operates narrowing thrust between 2 and the conveyor C 1 to 4 fold the piece of cloth folded state. (Folding process)
5.4-folded cloth is supplied to the 8-folding means in conveyer C 1 and the conveyor C 2 (7). (Transportation process)
Good among the supplied cloth from 6.4-fold device, the conveyor D 1 and pieces of cloth fourfold state operates narrowing thrust between the conveyor D 2 8 one folding and by 8 fold means (7), the conveyor D supplied to 3, dirt products, the apparatus by a signal from the signal processing unit is controlled deactivated, is discharged in a fourfold state outside of the holder. (8-fold process)
7.8-folded cloth is supplied to the 16 folding means at the intermediate portion of the conveyor D 3 (8). (Transportation process)
8.8 Move the front end of the folded eighteen piece of cloth up and down on the 16-fold plate that moves vertically, hold the front end with the pressing plate above it, wait for the rear end to pass, and hold it at the same time as the rear end passes Fold 16 by opening. (16 folding process)
9.16 supplying-folded fabric piece 32 folding device located at the rear end of the conveyor D 3. (Transportation process)
Good among the supplied cloth from 10.16 folding means (8), 32 pieces of cloth operation was 16 fold state narrowing thrust between the cloth folding means (9) by the conveyor E 1 and the conveyor E 2 32 The folded and torn product is inoperatively controlled by a signal from the signal processing unit and discharged in a 16-fold state outside the holder. (32 folding process)
Supplied to the stacker a 11.32-folded cloth pieces were sandwiched by the conveyor E 1 and the conveyor E 2. (Transportation process)
12. By opening a pair of stacker plates (10), 32 folded cloth pieces (good products) are dropped and stacked, and for a dirty product, the discharge opening open flat plate (11) is opened based on a signal from the signal processing unit to open the stacker plate (10). Is discharged to the outside of the holder in a 32-fold state. (Stock process)
[0025]
In the above embodiment, although to feed the cloth piece between the conveyor A and the conveyor B 1 by inverting conveyor B 1 in folded step, it is discharged to the outside of the intact holder without inverting conveyor B 1 You may do so.
Further, in the above embodiment, the defective product is discharged in the conveyor device of the holder, but the discharge device (rejector (28)) is provided on the conveyor for transferring from the ironer to the holder so that the defective product is discharged. You may do it.
[0026]
【The invention's effect】
The present invention having the above configuration can expect the following effects.
Since the image input from the image sensor can be determined and the inspection can be started / terminated, it is possible to accurately perform the inspection even in the front and rear mask areas in a curved shape.
An accurate mask can be formed around. (Conventionally, the front end / rear end direction is cut in a line shape)
Since a cloth piece detector is not used, equipment trouble is less likely to occur.
The inspection status can be easily confirmed by the display function of the defect position.
[0027]
The flowing defect sample can be stored internally as two-dimensional data, and since this data is in a format captured as a two-dimensional defect sample flowing, noise such as wrinkles and formations is also included. By reusing the data as it is and making adjustments, it is possible to make adjustments based on the same data containing uniform noise as compared to the conventional method, so that appropriate adjustments can be made quickly and easily, In addition, since the adjustment suitable for the detection purpose can be easily and accurately performed, the reliability of the defect detection of the apparatus is increased.
[0028]
Since this is performed by increasing or decreasing the light amount based on the input image in response to the light amount shortage, it has a function of keeping the input light amount constant. Since the noise is not amplified because it is performed by increasing or decreasing the amount of light, a stable inspection can be performed. The amount of light can be adjusted even for a colored work (cloth piece), and inspection can be performed. Is easy.
[Brief description of the drawings]
FIG. 1 is a front view of a cloth inspection apparatus.
FIG. 2 is a side view of the cloth inspection apparatus.
FIG. 3 is a block diagram of a signal processing unit of the cloth inspection apparatus.
FIG. 4 is a flowchart of a process performed by the signal processing unit when the inspection state is maintained;
FIG. 5 is a flowchart of the adjustment of the signal processing unit.
FIG. 6 is an explanatory diagram of an operation state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Camera 2 Illumination device 3 Rotation detector 4 Inspection table 5 Two-folding means 6 Four-folding means 7 Eight-folding means 8 16-folding means 9 32-folding means 10 Stacker plate 11 Discharge hole opening / closing plate 12 Roller ironer conveyor 20 Input part 21 Processing Unit 22 storage unit 23 inspection state storage unit 24 defect position storage unit 25 output unit 26 illumination controller unit 27 display unit 28 rejectors A 1 to E 2 holder conveyor

Claims (7)

ラインイメージセンサーと、該センサーからの布片検出信号にもとづいて布片の欠陥を検出する信号処理部を備えた布片検査装置において、前記信号処理部が、前記センサーからの布片検出信号を、検査開始および検査中として記憶する検査状態記憶部と、前記サンサーが撮像したラインイメージを記憶する記憶部とを備えたことを特徴とする布片検査装置。A line image sensor, a cloth inspection apparatus including a signal processing unit that detects a defect of a cloth based on a cloth detection signal from the sensor, wherein the signal processing unit detects a cloth detection signal from the sensor. A cloth state inspection apparatus, comprising: an inspection state storage unit that stores an inspection start and an inspection in progress; and a storage unit that stores a line image captured by the sensor. 上記記憶部に記憶したラインイメージを表示する表示部を備えたことを特徴とする請求項1記載の布片検査装置。2. The cloth inspection apparatus according to claim 1, further comprising a display unit for displaying the line image stored in the storage unit. 上記表示部が、上記記憶部に欠陥位置情報を表示する表示部であることを特徴とする請求項2記載の布片検査装置。The cloth inspection apparatus according to claim 2, wherein the display unit is a display unit that displays defect position information in the storage unit. 入力画像レベルをフィードバックして光量の自動調整を行う照明コントローラを備えたことを特徴とする請求項1〜3のいずれかに記載の布片検査装置。The cloth inspection apparatus according to any one of claims 1 to 3, further comprising an illumination controller that performs automatic adjustment of a light amount by feeding back an input image level. 上記信号処理部からの欠陥信号にもとづいて作動するリジェクタを備えたことを特徴とする請求項1〜4のいずれかに記載の布片検査装置。The cloth inspection apparatus according to any one of claims 1 to 4, further comprising a rejector that operates based on a defect signal from the signal processing unit. 上記信号処理部が、後続のホルダー内のリジェクタに対して排出指令を出力することを特徴とする請求項5記載の布片検査装置。6. The cloth inspection apparatus according to claim 5, wherein the signal processing unit outputs a discharge command to a rejector in a subsequent holder. 上記信号処理部が、後続のホルダーに対して欠陥の種類に応じた排出指令を出力することを特徴とする請求項5記載の布片検査装置。6. The cloth inspection apparatus according to claim 5, wherein the signal processing unit outputs a discharge command according to a type of the defect to a subsequent holder.
JP2002348604A 2002-11-29 2002-11-29 Cloth piece inspection device Expired - Fee Related JP3813121B2 (en)

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JP2006150198A (en) * 2004-11-26 2006-06-15 Yozo Maejima Apparatus for discriminating defective fabric product
JP2007105067A (en) * 2005-10-11 2007-04-26 Purex:Kk Fabric piece folding/lamination process machine
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JP2010273732A (en) * 2009-05-26 2010-12-09 Purex:Kk Apparatus for automatically developing/charging textile products
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JP5248919B2 (en) * 2008-05-29 2013-07-31 株式会社プレックス Folding machine with inspection function
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JP2006150198A (en) * 2004-11-26 2006-06-15 Yozo Maejima Apparatus for discriminating defective fabric product
JP4719452B2 (en) * 2004-11-26 2011-07-06 洋左右 前嶋 Cloth defect sorting device
JP2007105067A (en) * 2005-10-11 2007-04-26 Purex:Kk Fabric piece folding/lamination process machine
JP2008007886A (en) * 2006-06-29 2008-01-17 Purex:Kk Extension apparatus for inspecting faulty cloth
KR101254117B1 (en) 2006-12-19 2013-04-12 재단법인 포항산업과학연구원 A Method of image processing for textile inspection
JP2010273732A (en) * 2009-05-26 2010-12-09 Purex:Kk Apparatus for automatically developing/charging textile products
CN110057832A (en) * 2019-04-24 2019-07-26 拓卡奔马机电科技有限公司 A kind of fabric flaws detecting and controlling system on layout machine

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