JPS62293102A - Joint detecting method - Google Patents
Joint detecting methodInfo
- Publication number
- JPS62293102A JPS62293102A JP13791586A JP13791586A JPS62293102A JP S62293102 A JPS62293102 A JP S62293102A JP 13791586 A JP13791586 A JP 13791586A JP 13791586 A JP13791586 A JP 13791586A JP S62293102 A JPS62293102 A JP S62293102A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- holes
- diameter
- masking
- interval
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 28
- 230000000873 masking effect Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000011143 downstream manufacturing Methods 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 3
- 230000002950 deficient Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
「産業上の利用分野」
フィルム、ストリップ等の帯状物体を連続処理する設備
における帯状物体の継目検出方法に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention "Field of Industrial Application" This invention relates to a method for detecting seams in strip-shaped objects in equipment that continuously processes strip-shaped objects such as films and strips.
「従来の技術」
継目検出方法としては種々のものが考案されており、光
学式をはじめとして渦流式、磁界検出式、超音波式、距
離計式、圧力式、温度検出式、放射線式等の継目検出器
が知られている。``Prior art'' Various seam detection methods have been devised, including optical methods, eddy current methods, magnetic field detection methods, ultrasonic methods, distance meter methods, pressure methods, temperature detection methods, radiation methods, etc. Seam detectors are known.
継目検出の信頼性は、ラインの生産性や歩留りを左右す
るため非常に高いものが要求されている。The reliability of seam detection is required to be extremely high because it affects line productivity and yield.
これに対して前記光学式以外の継目検出方法では、継目
の見逃し率を１％、誤検出率を１％程度まで低減させる
ことは可能であるが、９９．９９％前後の信頼性が要求
されている現状ではとても実用化は困難である。On the other hand, with seam detection methods other than the optical method mentioned above, it is possible to reduce the seam oversight rate to about 1% and the false detection rate to about 1%, but a reliability of around 99.99% is required. In the current situation, it is very difficult to put it into practical use.
現在量も信頼性の高いものは継目部に穿孔したパンチ孔
を光学的に検出する方法であるが、検出の信頼性を向上
するために、継目の見逃しだけでなくヘゲ孔等パンチ孔
と類似の欠陥孔が存在する場合の誤動作を回避する手段
が提案されている。Currently, the most reliable method is to optically detect punched holes drilled at seams, but in order to improve the reliability of detection, it is necessary to detect not only missed seams but also punched holes such as bald holes. Means have been proposed to avoid malfunctions when similar defective holes exist.
継目部の穿孔が単一のパンチ孔である場合は、検出器の
視野に存在する孔を欠陥孔と識別するために、帯状物体
の幅方向中心線上にパンチ孔を穿孔し、または孔径を検
出し、あるいは孔の形状を認識する方法をとり、または
これらを組合わせるなどして誤検出の防止対策となし得
るが、前記幅方向中心線上に穿孔すると言っても、ライ
ン蛇行量を考慮して±１５０ないし２００ ｍの許容幅
を設定する必要があるが、欠陥孔がこの許容幅内を通過
することを考えると信頼性に乏しいものとなる。If the joint is a single punched hole, punch the hole on the center line in the width direction of the strip object or detect the hole diameter in order to identify the hole in the field of view of the detector as a defective hole. Alternatively, a method of recognizing the shape of the hole, or a combination of these methods can be used to prevent false detection. Although it is necessary to set a tolerance width of ±150 to 200 m, reliability is poor if it is considered that a defective hole passes within this tolerance width.
また、帯状物体の幅方向中心線を認識するためには帯状
物体の端部を検出する装置が必要となる等の問題がある
。Further, there are problems such as the need for a device for detecting the end of the strip-shaped object in order to recognize the center line in the width direction of the strip-shaped object.
孔径については、長円孔などの欠陥孔でその短径が継目
部を検出するための穿孔の直径と一致する場合には誤検
出となる。Regarding the hole diameter, if the short diameter of a defective hole such as an oblong hole matches the diameter of the hole for detecting the joint, an erroneous detection will occur.
さらに、孔の形状の認識については、例えば画像処理機
能を備えた表面班検査装宣のような高価な器具が必要と
なる。Furthermore, recognition of the shape of the holes requires expensive equipment, such as a surface inspection device with image processing capabilities.
このような単一の穿孔による検出方法の問題点を改善し
たものとして、例えば特開昭５９−２１８２１３号公報
に開示されている。For example, Japanese Unexamined Patent Publication No. 59-218213 discloses a technique that improves the problems of the detection method using a single hole.
すなわち、帯板の溶接部を検出する方法として帯板の進
行方向および板幅方向の異なる位置に複数の検出器を設
け、複数の検知信号を得てそれから求めた帯板走行長さ
とその検出器相互間の帯板進行方向距離とを比較するも
のである。That is, as a method for detecting welded parts of a strip, multiple detectors are installed at different positions in the strip traveling direction and the strip width direction, and multiple detection signals are obtained, and the strip running length and its detector are determined from the multiple detection signals. The distances between the strips in the traveling direction are compared.
「発明が解決しようとする問題点」
しかし、前記特開昭５９−２１８２１３号公報に記載さ
れている方法は精度のよい継目検出が可能であるが、電
磁気的にまたは段差あるいは板厚変化を検出する方式の
高価な検出器を複数台とパルス発生器を必要とするため
設備費が高くなるという問題がある。"Problems to be Solved by the Invention" However, although the method described in JP-A-59-218213 is capable of detecting seams with high accuracy, There is a problem in that equipment costs are high because multiple expensive detectors and pulse generators are required.
「問題点を解決するための手段」
本発明は、かくの如き従来技術の問題点を解決すべくな
したものである。"Means for Solving the Problems" The present invention has been made to solve the problems of the prior art as described above.
すなわち本発明は、搬送方向に直交する一線上に、あら
かじめ設定された直径と間隔で複数個のパンチ孔を穿孔
したのち、前記パンチ孔を光学的手段によって検出し、
検出した前記パンチ孔の第１孔の直径が前記設定値の直
径と一致したときに、前記パンチ孔の第１孔と続いて検
出する第２孔との間で両パンチ孔の番孔の近傍を除く領
域では光学的手段の検出信号をマスキング処理し、検出
した第２孔の直径および両パンチ孔の間隔を前記設定値
の直径および間隔と比較する帯状物体の継目検出方法で
ある。That is, in the present invention, a plurality of punch holes are punched at predetermined diameters and intervals on a line perpendicular to the conveyance direction, and then the punch holes are detected by optical means,
When the diameter of the detected first hole of the punched holes matches the diameter of the set value, the distance between the first hole of the punched holes and the subsequently detected second hole is in the vicinity of the numbered holes of both punched holes. In this method, the detection signal of the optical means is subjected to masking processing in a region other than the above, and the detected diameter of the second hole and the interval between both punched holes are compared with the diameter and interval of the set values.
以下に本発明について説明する。The present invention will be explained below.
第１図は本発明により二個のパンチ孔を帯状物体にあけ
た場合の継目検出方法の説明図である。FIG. 1 is an explanatory diagram of a seam detection method when two punch holes are punched in a strip-shaped object according to the present invention.
第１図において、１は帯状物体である。帯状物体ｌの継
目を検出するため、あらかじめ帯状物体１の継目（図示
せず）の近傍にパンチ孔２，２′をあける。In FIG. 1, 1 is a strip-shaped object. In order to detect the seam of the strip-shaped object 1, punch holes 2, 2' are punched in advance near the seam (not shown) of the strip-shaped object 1.
パンチ孔の数は二個以上とするが、以下では二個の場合
について説明する。二個のパンチ孔２゜２′の直径ｄＩ
＋ ｄｔ はそれぞれ後述する方法で選定され、両パ
ンチ孔間の間隔りも所定の長さに設定される。Although the number of punched holes is two or more, the case of two punched holes will be described below. Diameter dI of two punch holes 2°2'
+ dt is selected by a method described later, and the distance between both punch holes is also set to a predetermined length.
３は前記パンチ孔を検出するための光学的手段で例えば
イメージセンサ−カメラである。まず、イメージセンサ
−カメラ３を、二個のパンチ孔２１２′を有して移動す
る帯状物体ｌの上方に下向きに固設して帯状物体１を光
学的に認識する。Reference numeral 3 denotes an optical means for detecting the punched hole, such as an image sensor/camera. First, the image sensor-camera 3 is fixed downwardly above the moving strip-shaped object l having two punch holes 212', and the strip-shaped object 1 is optically recognized.
つぎに、イメージセンサ−カメラ３に入力されて蓄積さ
れた電荷を本発明の検出手段に基づいて順次取出して処
理するコントローラ４について説明する。第２図は本発
明に係る継目検出回路図の一例である。コントローラ４
は、第２図に示す如きスキャナー４１、アンプ４２、遅
延処理回路４３、マスキング回路４４、論理積回路４５
、ｄ、Ｌ、ｎ検出回路４６、設定器４７および判定回路
４８で構成される。Next, a description will be given of the controller 4 which sequentially extracts and processes the charges inputted and accumulated in the image sensor/camera 3 based on the detection means of the present invention. FIG. 2 is an example of a seam detection circuit diagram according to the present invention. controller 4
includes a scanner 41, an amplifier 42, a delay processing circuit 43, a masking circuit 44, and an AND circuit 45 as shown in FIG.
, d, L, n detection circuit 46, setting device 47, and determination circuit 48.
設定器４７には、あらかじめ設定された二値化のための
弁別レベルＶｄ、マスキングレベルα、β。In the setting device 47, a discrimination level Vd and masking levels α and β for binarization are set in advance.
！およびパンチ孔レベルｄ＋ 、ｄｔ 、Ｌ、ｎを設定
しておく。! and punch hole levels d+, dt, L, and n.
前記マスキングレベルとは、前記二個のバンチ孔２．２
′間に欠陥孔が存在しても継目検出の判定を誤らないよ
うに欠陥孔をマスキングするための設定値である。すな
わち、パンチ孔２．２′間の間隔りの内側でパンチ孔２
，２′からそれぞれ距離αおよびβだけ内側にある間隔
！（以下マスキング間隔と呼ぶ）の部分の孔信号を消去
するためのα、βおよびｆを設定するのである。The masking level refers to the two bunch holes 2.2.
This is a setting value for masking defective holes so that even if a defective hole exists between '', the joint detection judgment will not be mistaken. That is, the punch holes 2 and 2 are located inside the gap between the punch holes 2 and 2'.
, 2′ by distances α and β, respectively! α, β, and f are set in order to erase the hole signal in the portion (hereinafter referred to as masking interval).
前記パンチ孔レベルとは、あらかじめ穿孔する各パンチ
孔２．２′の直径ｄ＋ 、ｄｔ 、パンチ孔２．２′
間の間隔りおよびパンチ孔２．２′の数ｎである。The punch hole level means the diameter d+, dt of each punch hole 2.2' to be punched in advance, the punch hole 2.2'
and the number n of punched holes 2.2'.
イメージセンサ−カメラ３に蓄積された入力電荷は、ス
キャナー４１にて順次取出されアンプ４２で増幅され一
定の弁別レベルＶｄにて二値化されその二値化信号を論
理積回路４５に送信する。The input charges accumulated in the image sensor/camera 3 are sequentially extracted by a scanner 41, amplified by an amplifier 42, binarized at a constant discrimination level Vd, and the binarized signal is transmitted to an AND circuit 45.
一方、パンチ孔２，２′ の第１孔検出時の立上り信号
を遅延処理回路４３に送り設定器４７からの指令値によ
って前記立上り信号からαに相当するビット数だけ遅延
してマスキングを開始するためのタイミングを作成し、
続くマスキング回路４４にてマスキング間隔２によって
マスキング長さがｌになるようにマスキング信号を作成
して論理積回路４５に送信され、先きの二値化信号との
論理積を演算したのち、検出回路４６にてパンチ孔２，
２′の直径ｄ＋’、ｄｓ’、パンチ孔２．２′間の間隔
Ｌ′およびパンチ孔２．２′ の数ｎ′を検出し、っぎ
の判定回路４８にて設定Ｈ４７の設定値ｄ＋、ｄａ、Ｌ
。On the other hand, the rising signal when the first punch hole 2, 2' is detected is sent to the delay processing circuit 43, and according to the command value from the setting device 47, masking is started after the rising signal is delayed by the number of bits corresponding to α. create a timing for
In the subsequent masking circuit 44, a masking signal is created so that the masking length becomes l with the masking interval 2, and is sent to the AND circuit 45, and after calculating the AND with the previous binarized signal, it is detected. Punch hole 2 in circuit 46,
2' diameter d+', ds', the interval L' between punch holes 2.2', and the number n' of punch holes 2.2', and the determination circuit 48 determines the setting value d+ of H47, da, L
.
ｎと比較され、継目検出信号と上流工程および／または
下流工程識別信号を出力する。n, and outputs a seam detection signal and an upstream process and/or downstream process identification signal.
つぎに、上記識別信号について説明する０本発明に基づ
く継目検出器を配設したラインよりも上流の工程が複数
である場合に上流工程のプロセスを認識し、それに応じ
て分割等の処理を行う必要が生ずる。また、帯状物体１
を継目検出後にどの工程へ仕向けるかを品別することが
必要である。Next, the above identification signal will be explained. When there are multiple processes upstream of the line in which the seam detector based on the present invention is installed, the process of the upstream process is recognized and processing such as division is performed accordingly. A need arises. In addition, the belt-shaped object 1
It is necessary to determine which process to send to after seam detection.
そこで前記各パンチ孔２，２′の直径ｄ ＋ ＋ ｄ
＊を設定する際、それぞれ２水準を設定すれば４種類の
識別が可能であり、前記において一方の直径を３水準と
すれば６１１！類、両方とも３水準とすれば９種類識別
が可燦となる。Therefore, the diameter d + + d of each punch hole 2, 2'
When setting *, four types can be identified by setting two levels for each, and if one of the diameters is set to three levels in the above, 611! If both types are set to 3 levels, 9 types can be distinguished.
また、パンチ孔２，２′ 間の間隔りについてもパンチ
孔２．２′の第１孔の直径に応じて適宜の長さに設定す
ることにより識別の精度を向上させることができる。Furthermore, the accuracy of identification can be improved by setting the distance between the punch holes 2, 2' to an appropriate length depending on the diameter of the first hole of the punch holes 2, 2'.
さらに、マスキング間隔ｌを決めるためのα値およびβ
値は、パンチ孔２，２′ の加工精度とイメージセンサ
−カメラ３の検出精度を考慮して適宜に設定すればよい
。Furthermore, α value and β for determining the masking interval l
The value may be appropriately set in consideration of the machining accuracy of the punch holes 2, 2' and the detection accuracy of the image sensor/camera 3.
以上のとおりパンチ孔が二個の場合について説明したが
、これを三個以上にすれば本発明の継目検出の精度が向
上し、前記識別の種類を増すことができる。識別を必要
としない場合には、パンチ孔はもちろん一種類でよい。As described above, the case where there are two punch holes has been described, but if the number of punch holes is three or more, the accuracy of seam detection of the present invention can be improved and the types of identification can be increased. If identification is not required, only one type of punch hole is required.
「作用」
本発明に基づく、直径が各ｄ＋、ｄｔ である二個のパ
ンチ孔２．２′を穿孔してその間隔をＬとし、イメージ
センサ−カメラ３で検出した場合の欠陥孔による誤検出
の回避について各出力波形で説明する。"Operation" Based on the present invention, two punch holes 2 and 2' having diameters of d+ and dt are punched, and the distance between them is set to L, and the image sensor-camera 3 detects the error due to a defective hole. The avoidance of this will be explained using each output waveform.
第１図において２ａおよび２ｂは単独欠陥孔であり、そ
の直径は各ｄｓ、ｄｌ である、 ２ｃ、２ｄおよび２
ｅ。In FIG. 1, 2a and 2b are single defect holes, and their diameters are ds and dl, respectively. 2c, 2d and 2
e.
２ｆは共に搬送方向に直交する一線上に並ぶ二個の欠陥
孔で、番孔の直径はｄ＋、ｄ４およびｄ ＋ ＋ ｄ
ｔであり間隔は共にＬである。2f are two defective holes that are lined up on a line perpendicular to the conveyance direction, and the diameters of the holes are d+, d4, and d + + d.
t and the interval is both L.
これら各ケースおよび二個のパンチ孔の間に前記欠陥孔
２ａがパンチ孔２と間隔しで存在する場合におけるマス
キング処理前の各出力波形は第３図の如くである。In each of these cases and in the case where the defective hole 2a exists between the two punched holes at a distance from the punched hole 2, the output waveforms before the masking process are as shown in FIG.
第３図Ａはｄ＋、ｄｔ、Ｌおよび孔数からパンチ孔と判
定される。FIG. 3A is determined to be a punch hole based on d+, dt, L, and the number of holes.
第３図ＢおよびＣは孔数から単独欠陥孔と識別される。B and C in FIG. 3 are identified as single defect holes based on the number of holes.
第３図りは孔径ｄ ４により欠陥孔と識別される。The third hole is identified as a defective hole by the hole diameter d4.
第３図Ｅはパンチ孔と誤判定されるが実際には極めて希
れなケースである。The hole shown in FIG. 3E is erroneously determined to be a punch hole, but this is actually an extremely rare case.
第３図Ｆはパンチ孔と判定できず見逃がされる。3F cannot be determined to be a punch hole and is overlooked.
第４図はパンチ孔の間に欠陥孔を有する場合に本発明に
基づくマスキング処理によって誤判定を回避できること
を第３図りのケースについて示したもので、マスキング
間隔ｌの中にある欠陥孔２ａの孔信号がマスキング処理
されることによってパンチ孔２，２′を検出することが
できる。Fig. 4 shows the case of Fig. 3, which shows that when there is a defective hole between the punched holes, an erroneous judgment can be avoided by the masking process based on the present invention. The punched holes 2, 2' can be detected by masking the hole signals.
「実施例」 以下に本発明の詳細を実施例に基づいて説明する。"Example" The details of the present invention will be explained below based on examples.
ｉ鋼板の１ｆｉ接点にあらかじめ直径１０ｍの二個のパ
ンチ孔を内側間隔を９０ｆｌにしＴＩＩ鋼板の搬送方向
に直交する一線上に穿孔しておき、マスキング処理のα
値をパンチ孔の第１孔後端から４ｆｉ、β値をパンチ孔
の第２孔前端から３ｆｉに設定しマスキング間隔を８３
ｆｌとした。Two punch holes with a diameter of 10 m are pre-drilled at the 1fi contact point of the I steel plate with an inner interval of 90 fl in a line perpendicular to the conveying direction of the TII steel plate, and α of the masking process is performed.
Set the value to 4fi from the rear end of the first hole of the punch hole, set the β value to 3fi from the front end of the second hole of the punch hole, and set the masking interval to 83.
It was set as fl.
イメージセンサ−カメラがパンチ孔の第１孔を検出する
と、その信号の立上りと同時にα値とマスキング間隔が
設定される。When the image sensor/camera detects the first punched hole, the α value and the masking interval are set at the same time as the signal rises.
イメージセンサ−カメラの検出信号が、設定されたパン
チ孔の第１孔の直径に一致すると第１孔後端から４ｆｉ
経過時よりマスキングを開始し、マスキング間隔８３ｍ
の間をマスキングしたのち、再びイメージセンサ−カメ
ラの信号を取込みパンチ孔の第２孔の存在を識別し、そ
の検出信号が設定されたパンチ孔の第２孔の直径に一致
すると溶接点すなわち継目と判定される。When the detection signal of the image sensor-camera matches the diameter of the first hole of the set punch hole, 4fi from the rear end of the first hole is detected.
Masking started after the passage of time, and the masking interval was 83 m.
After masking the area between the holes, the signal from the image sensor and camera is taken in again to identify the existence of the second hole in the punched hole, and if the detection signal matches the diameter of the second hole in the punched hole, the welding point, that is, the seam is detected. It is determined that
なお、前記最初の孔の検出時に、設定されたパンチ孔の
第１孔の直径に一致しない場合は、前記マスキングのα
値およびマスキング間隔の設定は直ちに解除される。Note that when detecting the first hole, if the diameter does not match the diameter of the first hole of the set punch holes, the masking α
The value and masking interval settings are cleared immediately.
本実施例は上流工程または下流工程の識別をしない場合
の例である。This embodiment is an example in which the upstream process or the downstream process is not identified.
つぎに上流工程または下流工程を識別する場合の例につ
いて述べる。Next, an example of identifying an upstream process or a downstream process will be described.
パンチ孔の第１孔の直径を１０ｆｌおよび１５ｆｉに、
パンチ孔の第２孔の直径を１０ｍおよび１５ｆｉに、二
個のパンチ孔の内側間隔を９０鶴に設定し、マスキング
処理のα値をパンチ孔の第１孔後端から４ｆｉ、β値を
パンチ孔の第２孔前端から３鶴に設定しマスキング間隔
を８３鶴とした。The diameter of the first hole of the punch hole is 10fl and 15fi,
The diameter of the second punch hole is set to 10 m and 15 fi, the inner distance between the two punch holes is set to 90 mm, the α value of the masking process is set to 4 fi from the rear end of the first punch hole, and the β value is set to 10 m and 15 fi. The masking distance was set to 3 holes from the front end of the second hole, and the masking interval was 83 holes.
薄鋼板の溶接点に、その上流工程または下流工程の種別
によって定められたパンチ孔の直径の中から該当する直
径を選択し、前記直径の二個のパンチ孔を内側間隔を９
０諺にして薄鋼板の搬送方向に直交する一線上に穿孔し
ておく。At the welding point of the thin steel plate, select the appropriate diameter from among the diameters of punch holes determined by the type of upstream or downstream process, and punch two punch holes of the above diameter with an inner interval of 9.
Drill holes in a line perpendicular to the conveyance direction of the thin steel plate.
イメージセンサ−カメラがパンチ孔の第１孔を検出する
と、その信号の立上りと同時にα値とマスキング間隔が
設定される。When the image sensor/camera detects the first punched hole, the α value and the masking interval are set at the same time as the signal rises.
イメージセンサ−カメラの検出信号が設定されたパンチ
孔の第１孔の直径であるＩＯ鶴か１５ｍかを判別し、そ
のいずれかに一致すると第１７１，１３１端から４ｆｉ
経過時よりマスキングを開始し、マスキング間隔８３ｆ
ｌの間をマスキングしたのち、イメージセンサ−カメラ
でパンチ孔の第２孔の存在を識別し、設定されたパンチ
孔の直径である１０ｍが１５ｔｌかを判別し、そのいず
れかに一致すると溶接点すなわち継目と判定され、同時
に判別した前記二個のパンチ孔の直径の組合わせから上
流工程または下流工程の種類の識別が行われる。The detection signal of the image sensor-camera determines whether the diameter of the first hole of the set punch hole is IO Tsuru or 15m, and if it matches either, 4fi from the 171st and 131st ends
Start masking after the elapsed time, and the masking interval is 83f.
After masking the space between 1 and 1, the image sensor and camera identify the existence of the second hole of the punch hole, determine whether the set punch hole diameter of 10 m is 15 tl, and if it matches either of the two, the welding point is determined. That is, it is determined that it is a seam, and the type of upstream process or downstream process is identified based on the combination of the diameters of the two punch holes that are determined at the same time.
「発明の効果」
以上述べた如く、本発明の継目検出方法は、複数個のパ
ンチ孔を搬送方向に直交する一線上に穿孔し、これを光
学的手段で検出するもので、欠陥孔はマスキング処理に
よって誤動作を回避するようにしたので極めて信頼性の
高い検出ができる。"Effects of the Invention" As described above, in the seam detection method of the present invention, a plurality of punch holes are punched in a line perpendicular to the conveying direction, and these are detected by optical means, and defective holes are masked. Since malfunctions are avoided through processing, extremely reliable detection can be achieved.
また、検出器も一台でよいため設備費も少なくてすむ。Furthermore, since only one detector is required, equipment costs can be reduced.
全長２０００−の鋼板について、視野が３００ｆｉのイ
メージセンサ−カメラを用い、パンチ孔を二個穿孔して
本発明に基づく継目検出を行った場合の信頼性は９９．
９９％に達した。The reliability of seam detection based on the present invention on a steel plate with a total length of 2,000 mm using an image sensor camera with a field of view of 300 fi by punching two holes is 99.
It reached 99%.
さらに、上流工程または下流工程の識別が同時にできる
ため、オペレーターの負担が軽減される。Furthermore, since the upstream process or downstream process can be identified at the same time, the burden on the operator is reduced.
第１図は本発明に係る継目検出方法の説明図、第２図は
本発明に係る継目検出回路図の一例を示す図、第３図は
本発明に係るパンチ孔の判定を出力波形で示した説明図
、第４図は本発明に係るマスキング処理の説明図である
。
！・・・帯状物体、２，２′ ・・・パンチ孔、３・・
・イメージセン号−カメラ、４・・・コントローラ。
代 理 人 弁理士 今 岡 良
夫 、１第１図
第３図
第
Ｏ
（処理後の勇３し）
４図
２２“FIG. 1 is an explanatory diagram of the seam detection method according to the present invention, FIG. 2 is a diagram showing an example of a seam detection circuit diagram according to the present invention, and FIG. 3 is an output waveform showing punch hole determination according to the present invention. FIG. 4 is an explanatory diagram of the masking process according to the present invention. ! ...Band-shaped object, 2,2' ...Punch hole, 3...
・Image sensor - camera, 4...controller. Representative Patent Attorney Ryo Imaoka
Husband, 1 Figure 1 Figure 3 Figure O (Yuu 3 after treatment) 4 Figure 22
Claims (2)
れた直径と間隔で複数個のパンチ孔を穿孔したのち、前
記パンチ孔を光学的手段によって検出し、検出した前記
パンチ孔の第１孔の直径が前記設定値の直径と一致した
ときに、前記パンチ孔の第１孔と続いて検出する第２孔
との間で両パンチ孔の各孔の近傍を除く領域では光学的
手段の検出信号をマスキング処理し、検出した第２孔の
直径および両パンチ孔の間隔を前記設定値の直径および
間隔と比較することを特徴とする帯状物体の継目検出方
法。(1) After punching a plurality of holes at predetermined diameters and intervals on a line perpendicular to the conveyance direction, the punched holes are detected by optical means, and the first hole of the detected punched holes is punched. When the diameter of the hole matches the diameter of the set value, optical means is used to detect the area between the first hole of the punch hole and the second hole to be subsequently detected, excluding the vicinity of each hole of both punch holes. A method for detecting a seam in a band-shaped object, characterized in that the signal is subjected to masking processing, and the detected diameter of the second hole and the interval between both punched holes are compared with the diameter and interval of the set values.
／または下流工程の種別によってあらかじめ選定された
複数種類の直径の中から選択した直径に穿孔したパンチ
孔である特許請求の範囲第１項記載の継目検出方法。(2) Claim 1, wherein the plurality of punch holes are punch holes having a diameter selected from among a plurality of diameters preselected depending on the type of upstream process and/or downstream process of the strip-shaped object. Seam detection method described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13791586A JPH0781821B2 (en) | 1986-06-12 | 1986-06-12 | Seam detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13791586A JPH0781821B2 (en) | 1986-06-12 | 1986-06-12 | Seam detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62293102A true JPS62293102A (en) | 1987-12-19 |
| JPH0781821B2 JPH0781821B2 (en) | 1995-09-06 |
Family
ID=15209657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13791586A Expired - Fee Related JPH0781821B2 (en) | 1986-06-12 | 1986-06-12 | Seam detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0781821B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010008297A (en) * | 2008-06-30 | 2010-01-14 | Jfe Steel Corp | Detection method of position of welding hole |
| JP2011505257A (en) * | 2007-11-29 | 2011-02-24 | ポスコ | Apparatus and method for detecting joints of steel plates in endless hot rolling process |
| JP2017127059A (en) * | 2016-01-12 | 2017-07-20 | トヨタ自動車株式会社 | Method for detecting warpage of laminated steel sheet for motor |
| CN111389957A (en) * | 2020-03-18 | 2020-07-10 | 宁波韵升智能技术有限公司 | Spacing counting assembly of banded product |
-
1986
- 1986-06-12 JP JP13791586A patent/JPH0781821B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011505257A (en) * | 2007-11-29 | 2011-02-24 | ポスコ | Apparatus and method for detecting joints of steel plates in endless hot rolling process |
| JP2010008297A (en) * | 2008-06-30 | 2010-01-14 | Jfe Steel Corp | Detection method of position of welding hole |
| JP2017127059A (en) * | 2016-01-12 | 2017-07-20 | トヨタ自動車株式会社 | Method for detecting warpage of laminated steel sheet for motor |
| CN111389957A (en) * | 2020-03-18 | 2020-07-10 | 宁波韵升智能技术有限公司 | Spacing counting assembly of banded product |
| CN111389957B (en) * | 2020-03-18 | 2024-04-30 | 宁波韵升智能技术有限公司 | Limiting and counting device for strip-shaped products |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0781821B2 (en) | 1995-09-06 |
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