JP2635890B2 - Distance measurement method by image processing - Google Patents
Distance measurement method by image processingInfo
- Publication number
- JP2635890B2 JP2635890B2 JP20251992A JP20251992A JP2635890B2 JP 2635890 B2 JP2635890 B2 JP 2635890B2 JP 20251992 A JP20251992 A JP 20251992A JP 20251992 A JP20251992 A JP 20251992A JP 2635890 B2 JP2635890 B2 JP 2635890B2
- Authority
- JP
- Japan
- Prior art keywords
- measured
- camera
- image processing
- reference position
- distance
- 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.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、画像処理による距離計
測方法に関する。特に、ボビン(特に紙管)端にトラン
スファ−テ−ルを形成する際に生じる重ね巻糸条(糸条
重ね巻部)の切断除去に際し、切断装置を移動させる距
離を画像計測装置で計測する方法に関し、更に詳しくは
ポリエステル、ポリアミド繊維のような合成繊維の糸条
巻物であるチ−ズ、パ−ンのボビン端部の重ね巻糸条切
断のための切断装置を移動させる距離の計測方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distance measuring method by image processing. In particular, when cutting and removing the lap wound yarn (thread lap winding portion) generated when a transfer tail is formed at the end of a bobbin (especially a paper tube), the distance by which the cutting device is moved is measured by an image measuring device. More specifically, the present invention relates to a method for measuring the distance for moving a cutting device for cutting lap wound yarns at the bobbin end of a cheese or a yarn made of synthetic fibers such as polyester or polyamide fibers. About.
【0002】[0002]
【従来の技術】近年、ポリエステル、ポリアミド繊維の
ような合成繊維糸条を延伸撚糸機、延伸仮撚機等で加工
処理する場合、原糸ボビン間で巻き始めの糸端と巻き終
わりの糸端とを結び合わせて連続処理が行えるようにす
るため、巻き始め時にトラバ−ス領域外のボビン端部
に、いわゆるトランスファ−テ−ルを形成している(特
公昭57−36233号公報、特開昭58−11955
3号公報)。2. Description of the Related Art In recent years, when a synthetic fiber yarn such as polyester or polyamide fiber is processed by a draw twisting machine, a draw false twisting machine, or the like, a yarn end at a start of winding between yarn bobbins and a yarn end at an end of winding. A so-called transfer tail is formed at the end of the bobbin outside the traverse area at the beginning of winding in order to perform continuous processing by combining the above-mentioned methods (Japanese Patent Publication No. 57-36233, 58-19555
No. 3).
【0003】このようにして巻き取られた糸条パッケ−
ジはトランスファ−テ−ル処理が容易に行えるように、
一定の長さのトランスファ−テ−ルを残してボビン端に
形成されたバンチ巻き(重ね巻)もしくはピグテ−ルを
剥取られた後の糸端はテ−プ、ラベル、シ−ル(紙)等
でボビン端に固定されている。[0003] The yarn package thus wound up
To facilitate transfer tail processing,
After removing the bunch winding (lap winding) or pigtail formed at the bobbin end while leaving the transfer tail of a certain length, the end of the yarn is a tape, label, seal (paper). ) Is fixed to the bobbin end.
【0004】従来、かかる糸条重ね巻部の剥ぎ取り処理
は人手により行われていたが、近年機械化、自動化が試
みられ、特開平2−43180号公報の方法等が提案さ
れている。このための糸条重ね巻き切断位置を検出する
方法としては、重ね巻き部に近紫外光を照射し、固体カ
メラにより糸条からの2次励起光を検出し、重ね巻糸条
の位置を計測する。Conventionally, the stripping process of such a thread-wound portion has been manually performed. However, in recent years, mechanization and automation have been attempted, and a method disclosed in Japanese Patent Application Laid-Open No. 2-43180 has been proposed. As a method for detecting the cutting position of the lap winding for this purpose, near-ultraviolet light is applied to the lap winding portion, the secondary excitation light from the yarn is detected by a solid-state camera, and the position of the lap winding is measured. I do.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、バルジ
と呼ばれる糸条パッケ−ジ端面の膨らみを避けるため
に、前記固体カメラと紙管の法線方向との間に一定角度
を有して取り付けることが必要となり、ボビン上の位置
によってボビン端部と前記固体カメラとの間隔が異な
り、該間隔の差が前記固体カメラの被写界深度範囲を越
えて存在するために、糸条重ね巻部の切断位置の画像の
一部に焦点ズレを生じる。この焦点ズレにより画像がぼ
やけ、反射光量がしきい値を越えた位置が特定できなく
なる。このため画像計測によるボビン上の距離の計測誤
差が生じ、計測精度が劣化し、切断してはならないトラ
ンスファ−テ−ルの十分な検出精度が得られないという
問題点があった。However, in order to avoid the bulging of the end face of the thread package called a bulge, it is necessary to attach the solid camera with a fixed angle between the solid camera and the normal direction of the paper tube. The distance between the end of the bobbin and the solid-state camera is different depending on the position on the bobbin, and the difference in the distance is beyond the depth of field of the solid-state camera. A defocus occurs in a part of the image at the position. Due to this defocus, the image is blurred, and the position where the amount of reflected light exceeds the threshold value cannot be specified. For this reason, there has been a problem that a measurement error of the distance on the bobbin by image measurement occurs, the measurement accuracy is deteriorated, and sufficient detection accuracy of the transfer tail which must not be cut cannot be obtained.
【0006】本発明はかかる現状に鑑みなされたもの
で、被計測対象の一部もしくは計測基準位置が画像処理
用カメラの被写界深度範囲外に位置する際に、前記カメ
ラの焦点ズレによって生じる計測誤差による計測精度の
劣化の改善を容易に行うことを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and occurs when a part of an object to be measured or a measurement reference position is located outside a depth-of-field range of an image processing camera due to a defocus of the camera. An object of the present invention is to easily improve deterioration of measurement accuracy due to a measurement error.
【0007】[0007]
【課題を解決するための手段】本発明にかかる画像処理
による距離計測方法は、画像処理用カメラが被計測面の
法線方向に対し任意の取付け角度を有するために、前記
被計測面上に設定した基準位置もしくは被計測対象の一
部が前記カメラの被写界深度範囲外に存在する場合の前
記基準位置から該被計測対象までの距離を計測するに際
し、該被計測対象が前記カメラの被写界深度範囲内に位
置するように前記カメラの焦点を設定し、前記基準位置
を画像処理用コントロ−ラ内に於いて仮想的に設定する
とともに、前記基準位置に対応する被計測対象物の位置
に反射光量の明暗レベルを一定とするマ−キングプレ−
トを設けることにより、該被計測対象付近もしくは前記
基準位置付近において生ずる前記カメラの焦点ズレによ
る計測誤差を除去することを特徴とする。SUMMARY OF THE INVENTION A distance measuring method by image processing according to the present invention is a method of measuring a distance on a surface to be measured because an image processing camera has an arbitrary mounting angle with respect to a normal direction of the surface to be measured. When measuring the distance from the reference position to the object to be measured when the set reference position or a part of the object to be measured exists outside the depth of field range of the camera, the object to be measured is The focus of the camera is set so as to be located within the depth of field range, the reference position is virtually set in the image processing controller, and an object to be measured corresponding to the reference position is set. Marking press that keeps the brightness level of the reflected light amount constant at the position
The measurement error due to the defocus of the camera, which is generated in the vicinity of the object to be measured or in the vicinity of the reference position, is provided.
【0008】即ち、本発明は糸条パッケ−ジの重ね巻部
分もしくはトランスファ−テ−ル部分と基準位置との距
離を計測する画像処理用カメラと前記基準位置を仮想的
に設定する画像処理装置と前記基準位置に対応する前記
糸条パッケ−ジ上の位置付近の明暗レベルを一定とする
マ−キングプレ−トから構成され、前記カメラの焦点ズ
レによって生じる前記距離の計測誤差に起因する計測精
度の劣化を改善することを特徴とする画像処理による距
離計測方法である。That is, the present invention provides an image processing camera for measuring the distance between a lap portion or a transfer tail portion of a yarn package and a reference position, and an image processing apparatus for virtually setting the reference position. And a marking plate for maintaining a constant light and dark level near a position on the yarn package corresponding to the reference position, and a measurement accuracy caused by a measurement error of the distance caused by a defocus of the camera. This is a distance measuring method by image processing, which is characterized by improving deterioration of the distance.
【0009】ここで、基準位置もしくは被計測対象の一
部が前記カメラの被写界深度範囲外に存在する場合とし
ては、基準位置が被写界深度外に有り被計測対象が被写
界深度内に有る場合、もしくは基準位置が被写界深度内
に有り被計測対象の一部が被写界深度外に有る場合があ
る。Here, when the reference position or a part of the object to be measured exists outside the depth-of-field range of the camera, the reference position is outside the depth of field and the object to be measured is the depth of field. Or the reference position is within the depth of field and a part of the object to be measured is outside the depth of field.
【0010】また、本発明の距離の計測には市販の画像
処理コントローラを利用できることから、基準位置また
は被測定対象が被写界深度外に存在することによる焦点
ズレを解消すれば、該被計測対象付近もしくは前記基準
位置付近において生ずる前記カメラの焦点ズレによる計
測誤差を除去して、距離の計測を行うことができる。In addition, since a commercially available image processing controller can be used for the distance measurement of the present invention, if the focus shift caused by the reference position or the object to be measured being outside the depth of field is eliminated, the distance to be measured can be reduced. The distance can be measured by removing a measurement error due to a focus shift of the camera occurring near the target or near the reference position.
【0011】また、前記基準位置から該被計測対象まで
の距離の計測は、被計測対象(糸条等)と背景(紙管
等)の反射光量の差に着眼し、事前に定めたしきい値以
上の反射光量の受光位置と基準位置との距離を計測して
行う。The distance from the reference position to the object to be measured is measured by focusing on the difference in the amount of reflected light between the object to be measured (such as a thread) and the background (such as a paper tube), and a predetermined threshold is set. The measurement is performed by measuring the distance between the light receiving position of the reflected light amount equal to or more than the value and the reference position.
【0012】ところでマーキングプレートにおける明暗
レベルは、しきい値以上が明、しきい値以下が暗とし
て、このしきい値としては背景(紙管等)の反射光量の
最大値の2倍以上であることが好ましい。By the way, the light / dark level of the marking plate is bright above the threshold value and dark below the threshold value. The threshold value is twice or more the maximum value of the reflected light amount of the background (paper tube, etc.). Is preferred.
【0013】[0013]
【実施例】以下本発明の実施例を図面に従って説明す
る。図1は、本発明の画像処理による距離計測方法の一
実施例を示す。糸条パッケ−ジ端面のバルジ1を避ける
ため、該パッケ−ジの紙管7の法線方向と任意の角度2
を有して取り付けた画像処理用カメラ3により、紙管7
上で前記カメラ3の被計測範囲5内の任意の位置に存在
する重ね巻糸条4を切断するために、切断装置の移動距
離6である該重ね巻糸条4と紙管端面に設定した計測基
準位置との間の距離を計測する。該移動距離6を計測す
るに際し、紙管7の厚みと前記カメラ3の被写界深度範
囲8を考慮して、画像処理用コントロ−ラ11の内部に
おけるソフトウェア上の処理によって仮想的に移動距離
6の計測基準位置を設定し、該基準位置の明暗レベルを
一定に保持するためにマ−キングプレ−ト9を該基準位
置に対応するボビン上の位置10付近に、基準位置に対
応する糸条パッケージ上の位置がマーキングプレート上
になるよう配置した後、画像処理を行うことにより、計
測の基準位置が画像処理用カメラ3の被写界深度範囲8
外に位置し、前記重ね巻糸条4が前記被写界深度範囲8
内に位置する際に生ずる焦点ズレによる計測誤差による
計測精度の劣化を容易に改善することができる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a distance measuring method by image processing according to the present invention. In order to avoid the bulge 1 on the end face of the yarn package, an arbitrary angle 2 from the normal direction of the paper tube 7 of the package is used.
Paper core 7 by the image processing camera 3 attached with
In order to cut the overlapped yarn 4 existing at an arbitrary position in the measurement range 5 of the camera 3 above, the overlapped yarn 4 which is a moving distance 6 of the cutting device and the end face of the paper tube are set. The distance from the measurement reference position is measured. In measuring the moving distance 6, the thickness of the paper tube 7 and the depth-of-field range 8 of the camera 3 are taken into consideration, and the moving distance is virtually determined by software processing inside the image processing controller 11. In order to maintain the measurement reference position of the reference position 6 and keep the light / dark level of the reference position constant, the marking plate 9 is placed near the position 10 on the bobbin corresponding to the reference position, and the yarn corresponding to the reference position. After arranging the package so that the position on the package is on the marking plate, image processing is performed so that the measurement reference position is set to the depth of field 8 of the image processing camera 3.
Outside, and the lap winding yarn 4 is located in the depth of field range 8
Deterioration of measurement accuracy due to a measurement error due to a focus shift generated when the camera is located inside the camera can be easily improved.
【0014】[0014]
【発明の効果】本発明により、被計測対象の一部もしく
は計測基準位置が画像処理用カメラの被写界深度範囲外
に位置する際に、前記カメラの焦点ズレによって生じる
計測誤差による計測精度の劣化の改善を容易に行うこと
が可能になった。According to the present invention, when a part of the object to be measured or the measurement reference position is located outside the depth-of-field range of the image processing camera, the accuracy of the measurement due to the measurement error caused by the defocus of the camera is reduced. Deterioration can be easily improved.
【0015】特に、糸条巻物の重ね巻部分、ピグテ−ル
部分の剥ぎ取り自動化のために、被計測面であるボビン
上の糸条の重ね巻部分もしくはトランスファ−テ−ルの
部分と画像処理用カメラとの間隔が、該カメラの被写界
深度範囲を越えて存在する任意の角度を有して固定され
た状態で、重ね巻糸条切断のための切断装置の移動距離
を計測する際に、前記カメラの焦点ズレによって生じる
前記移動距離の計測誤差のために劣化する計測精度を改
善することができる。In particular, in order to automate the stripping of the wrapped portion and the pigtail portion of the thread wound material, image processing is performed on the wrapped portion or the transfer tail portion of the yarn on the bobbin which is the surface to be measured. When measuring the moving distance of the cutting device for cutting the overlapped yarn in a state where the distance from the camera for fixing is fixed at an arbitrary angle existing beyond the depth of field range of the camera. In addition, it is possible to improve the measurement accuracy deteriorated due to the measurement error of the moving distance caused by the defocus of the camera.
【図1】本発明の画像処理による距離計測方法の実施例FIG. 1 shows an embodiment of a distance measuring method by image processing according to the present invention.
1 糸条パッケ−ジ端面のバルジ 2 紙管の法線と画像処理用カメラの角度 3 画像処理用カメラ 4 重ね巻糸条 5 画像処理用カメラの被計測範囲 6 移動距離 7 紙管 8 画像処理用カメラの被写界深度範囲 9 マ−キングプレ−ト 10 計測基準位置に対応する紙管上の位置 11 画像処理用コントロ−ラ Reference Signs List 1 bulge of yarn package end face 2 Normal line of paper tube and angle of image processing camera 3 Image processing camera 4 Overlapping yarn 5 Measurement range of image processing camera 6 Moving distance 7 Paper tube 8 Image processing Depth of field range of camera 9 Marking plate 10 Position on paper tube corresponding to measurement reference position 11 Image processing controller
Claims (1)
対し任意の取付け角度を有するために、前記被計測面上
に設定した基準位置もしくは被計測対象の一部が前記カ
メラの被写界深度範囲外に存在する場合の前記基準位置
から該被計測対象までの距離を計測するに際し、該被計
測対象が前記カメラの被写界深度範囲内に位置するよう
に前記カメラの焦点を設定し、前記基準位置を画像処理
用コントロ−ラ内に於いて仮想的に設定するとともに、
前記基準位置に対応する被計測対象物の位置に反射光量
の明暗レベルを一定にするマ−キングプレ−トを設ける
ことにより、該被計測対象付近もしくは前記基準位置付
近において生ずる前記カメラの焦点ズレによる計測誤差
を除去することを特徴とする画像処理による距離計測方
法。An image processing camera has an arbitrary mounting angle with respect to a normal direction of a surface to be measured, so that a reference position set on the surface to be measured or a part of the object to be measured is not covered by the camera. When measuring the distance from the reference position to the object to be measured when present outside the depth of field range, focus the camera so that the object to be measured is located within the depth of field range of the camera. And setting the reference position virtually in the image processing controller.
By providing a marking plate at the position of the object to be measured corresponding to the reference position to make the light / dark level of the amount of reflected light constant, the focus shift caused by the camera near the object to be measured or near the reference position. A distance measuring method by image processing, wherein a measuring error is removed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20251992A JP2635890B2 (en) | 1992-07-29 | 1992-07-29 | Distance measurement method by image processing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20251992A JP2635890B2 (en) | 1992-07-29 | 1992-07-29 | Distance measurement method by image processing |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0650713A JPH0650713A (en) | 1994-02-25 |
JP2635890B2 true JP2635890B2 (en) | 1997-07-30 |
Family
ID=16458839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20251992A Expired - Fee Related JP2635890B2 (en) | 1992-07-29 | 1992-07-29 | Distance measurement method by image processing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2635890B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6641485B2 (en) * | 2016-08-09 | 2020-02-05 | シャープ株式会社 | Position specifying device and position specifying method |
-
1992
- 1992-07-29 JP JP20251992A patent/JP2635890B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0650713A (en) | 1994-02-25 |
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