JPH079585A - Detection of condition of splice part of metal cord-containing belt like member - Google Patents
Detection of condition of splice part of metal cord-containing belt like memberInfo
- Publication number
- JPH079585A JPH079585A JP5150731A JP15073193A JPH079585A JP H079585 A JPH079585 A JP H079585A JP 5150731 A JP5150731 A JP 5150731A JP 15073193 A JP15073193 A JP 15073193A JP H079585 A JPH079585 A JP H079585A
- Authority
- JP
- Japan
- Prior art keywords
- state
- splice
- shaped member
- splice portion
- detection
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000007493 shaping process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属コード入り帯状部材
スプライス部の状態検出方法に係わり、更に詳しくは、
規則的に配列された金属コードを有する帯状部材のスプ
ライス部がオープンの状態か、ラップの状態か、或いは
正常に突き合わされた状態かを常に正確に検出すること
が可能な金属コード入り帯状部材スプライス部の状態検
出方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a state of a splice portion of a belt-shaped member containing a metal cord, and more specifically,
A band-shaped member splice with a metal cord capable of always accurately detecting whether the splice portion of the band-shaped member having the regularly arranged metal cords is in the open state, the wrapped state, or the normally butted state. A method for detecting the state of a part
【０００２】[0002]
【従来の技術】従来、例えば、タイヤを製造する工程に
おいて、スチールコードを埋設したカーカスの両端部を
接合（スプライス）する工程がある。カーカスのスプラ
イス状態がタイヤのユニフォーミティに大きな影響を与
える一つの要因となっているため、このスプライス工程
は極めて重要になっている。特に、カーカスのスプライ
ス部がオープンの状態になることは、タイヤのユニフォ
ーミティ上回避することが要求されている。2. Description of the Related Art Conventionally, for example, in the process of manufacturing a tire, there is a process of joining (splicing) both ends of a carcass having steel cords embedded therein. This splicing process is extremely important because the splicing state of the carcass is one of the factors that greatly influences the tire uniformity. In particular, it is required that the open state of the splice portion of the carcass be avoided in terms of tire uniformity.
【０００３】ところで、上述したカーカスの接合工程を
自動化した際に、そのスプライス部の状態がオープン、
ラップ、或いは正常な突き合わせ状態であるかを、磁気
抵抗検出器を用いてそのスチールコード並びの平坦性を
検出することにより判定する提案がなされている。しか
し、この検出方法は、カーカスの両端部がラップ気味に
スプライスされた状態であっても、オープンの状態であ
ると判定してしまい、誤検出が多く発生すると言う問題
があった。By the way, when the above-mentioned carcass joining process is automated, the state of the splice portion is open,
A proposal has been made to determine whether a lap or a normal butting state is made by detecting the flatness of the steel cord arrangement using a magnetoresistive detector. However, this detection method has a problem in that even if both ends of the carcass are spliced in a wrapping manner, the carcass is determined to be in an open state, and many false detections occur.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、規則
的に配列された金属コードを有する帯状部材のスプライ
ス部を常に正確に検出することが出来る金属コード入り
帯状部材スプライス部の状態検出方法を提供することに
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for detecting the state of a metal cord-containing belt-shaped member splice portion, which can always accurately detect the splice portion of a belt-shaped member having regularly arranged metal cords. To provide.
【０００５】[0005]
【発明を解決するための手段】上記目的を達成する本発
明は、並設された磁気抵抗検出素子の検出領域内を該並
設方向に沿って、前記並設方向と交差する規則的に配列
された金属コードを有する帯状部材のスプライス部を通
過させ、該スプライス部の状態に応じて変化する磁気抵
抗により、前記並設された磁気抵抗検出素子に検出され
た電圧の差から前記スプライス部の状態をオープン、ラ
ップ、或いは突き合わせと判定することを特徴とする。According to the present invention to achieve the above object, a regular arrangement is provided in a detection region of a magnetoresistive detecting element arranged in parallel along the direction of the parallel arrangement and intersecting the direction of the parallel arrangement. The magnetic resistance that passes through the splice portion of the strip-shaped member having the metal cord is changed, and the magnetic resistance that changes according to the state of the splice portion causes the difference in the voltage detected by the magnetic resistance detection elements arranged in parallel from the splice portion. The feature is that the state is determined to be open, lap, or butt.
【０００６】[0006]
【作用】本発明は上記のように構成され、並設された磁
気抵抗検出素子の検出領域内を該並設方向に沿って、規
則的に配列された金属コードを有する帯状部材のスプラ
イス部を通過させると、帯状部材のスプライス部の状態
に応じて、並設された磁気抵抗検出素子に作用する磁気
抵抗が変化する。そのため磁気抵抗検出素子に発生して
いる磁界のバランスが帯状部材のスプライス部の状態に
応じて変わり、並設した磁気抵抗検出素子に異なった電
圧が検出され、その電圧差から金属コード入り帯状部材
のスプライス部の状態を、誤検出することなく、常に正
確に検出することが出来る。According to the present invention, the splice portion of the strip-shaped member having the metal cords regularly arranged in the detection region of the magnetoresistive detection elements arranged as described above is arranged along the juxtaposition direction. When passed, the magnetic resistance acting on the magnetic resistance detection elements arranged in parallel changes depending on the state of the splice portion of the strip-shaped member. Therefore, the balance of the magnetic field generated in the magnetoresistive detection element changes according to the state of the splice part of the strip-shaped member, and different voltages are detected by the magnetoresistive detection elements arranged in parallel. It is possible to always accurately detect the state of the splice part without being erroneously detected.
【０００７】[0007]
【実施例】以下、添付図面に基づいて本発明の実施例を
説明する。図１は、本発明の金属コード入り帯状部材ス
プライス部の状態検出方法に用いられる装置の概略説明
図であり、１は回転自在なドラム、３はスプライスされ
た帯状部材である。５はドラム１に対向して設置された
磁気抵抗検出手段、７は磁気抵抗検出手段５から入力さ
れた電圧の差を求める差電圧検出手段、９は差電圧検出
手段から入力された電圧波形を整形する波形整形手段、
１１は波形整形手段からの出力信号に基づいて帯状部材
３のスプライス部３ａの状態を判定する判定処理手段で
ある。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic explanatory view of an apparatus used in the method for detecting the state of a splice portion of a band-shaped member containing a metal cord according to the present invention, in which 1 is a rotatable drum and 3 is a spliced band-shaped member. Reference numeral 5 is a magnetic resistance detecting means installed facing the drum 1, 7 is a differential voltage detecting means for obtaining a difference between voltages input from the magnetic resistance detecting means 5, and 9 is a voltage waveform input from the differential voltage detecting means. Waveform shaping means to shape,
Reference numeral 11 is a determination processing means for determining the state of the splice portion 3a of the strip-shaped member 3 based on the output signal from the waveform shaping means.
【０００８】また、帯状部材３には、スチールコード等
の金属コードｍが帯状部材３の幅方向に沿って規則的に
配列された状態で埋設されている。磁気抵抗検出手段５
は、図２に示すように、並設されたコイル等からなる磁
気抵抗検出素子５ａ，５ｂと、この磁気抵抗検出素子５
ａ，５ｂを磁化する送信コイル５ｃを有し、この送信コ
イル５ｃは発信装置６に接続されて磁界を発生し、磁気
抵抗検出素子５ａ，５ｂがバランスして磁化されるよう
になっている。Further, metal cords m such as steel cords are embedded in the strip-shaped member 3 in a state of being regularly arranged along the width direction of the strip-shaped member 3. Magnetoresistive detection means 5
As shown in FIG. 2, the magnetoresistive detecting elements 5a and 5b, which are arranged in parallel with each other, and the magnetoresistive detecting element 5 are provided.
The transmission coil 5c magnetizes a and 5b. The transmission coil 5c is connected to the transmitter 6 to generate a magnetic field so that the magnetoresistance detecting elements 5a and 5b are magnetized in balance.
【０００９】７ａ，７ｂはそれぞれ磁気抵抗検出素子５
ａ，５ｂに接続されたアンプ、７ｃはアンプ７ａ，７ｂ
で増幅された電圧の差を求める差動アンプであり、差電
圧検出手段７を構成している。本発明の金属コード入り
帯状部材スプライス部の状態検出方法は、上述した装置
を用いて以下のように行うことが出来る。Reference numerals 7a and 7b denote magnetoresistive detecting elements 5, respectively.
Amplifiers connected to a and 5b, and 7c are amplifiers 7a and 7b
It is a differential amplifier that obtains the difference between the voltages amplified in step S1, and constitutes the difference voltage detection means 7. The method for detecting the state of the metal cord-containing belt-shaped member splice portion of the present invention can be performed as follows using the above-described device.
【００１０】即ち、ドラム１を回転させて帯状部材３の
スプライス部３ａを、並設された磁気抵抗検出素子５
ａ，５ｂの並設方向に沿って移動させる。規則的に配列
された金属コードｍを有する帯状部材３のスプライス部
３ａは、並設された磁気抵抗検出素子５ａ，５ｂの検出
領域内を通過する。この時、スプライス部３ａの状態が
正常な突き合わせ状態でなく、オープン或いはラップの
状態にあると、磁気抵抗が変化して、磁気抵抗検出素子
５ａ，５ｂのバランスがくずれる。That is, by rotating the drum 1, the splice portions 3a of the belt-shaped member 3 are arranged in parallel, and the magnetic resistance detecting elements 5 are arranged in parallel.
It is moved along the direction in which a and 5b are arranged in parallel. The splice portion 3a of the strip-shaped member 3 having the regularly arranged metal cords m passes through the detection regions of the magnetoresistive detection elements 5a and 5b arranged in parallel. At this time, if the splice portion 3a is not in a normal butted state but is in an open or lapped state, the magnetic resistance changes and the magnetic resistance detecting elements 5a and 5b are out of balance.
【００１１】即ち、図３（ａ）に示すように、帯状部材
３のスプライス部３ａがオープンの場合に、矢印方向に
帯状部材３が移動すると、磁気抵抗検出素子５ａの方の
磁気抵抗が先ず増加し、続いて磁気抵抗検出素子５ｂの
方の磁気抵抗が増加する。そのため、差電圧検出手段７
の出力波形ｖは、図３（ｂ）に示すように、最初に＋側
に突出した波形ｖ1 、続いて−側に突出した波形ｖ2 が
現れる。That is, as shown in FIG. 3 (a), when the band-shaped member 3 moves in the direction of the arrow when the splice portion 3a of the band-shaped member 3 is open, the magnetic resistance of the magnetoresistive detection element 5a becomes first. The magnetic resistance of the magnetoresistive detecting element 5b increases. Therefore, the differential voltage detecting means 7
As shown in FIG. 3 (b), the output waveform v of 1 appears first as a waveform v 1 protruding toward the + side and then as a waveform v 2 protruding toward the − side.
【００１２】また、図４（ａ）に示すように、帯状部材
３のスプライス部３ａがラップの場合には、磁気抵抗検
出素子５ａの方の磁気抵抗が先ず低下し、続いて磁気抵
抗検出素子５ｂの方の磁気抵抗が低下する。そのため、
差電圧検出手段７の出力波形ｖは、図４（ｂ）に示すよ
うに、最初に−側に突出した波形ｖ2 、続いて＋側に突
出した波形ｖ1 が現れる。Further, as shown in FIG. 4A, when the splice portion 3a of the belt-shaped member 3 is a wrap, the magnetic resistance of the magnetoresistive detecting element 5a first decreases, and then the magnetoresistive detecting element. The magnetic resistance of 5b decreases. for that reason,
As shown in FIG. 4B, the output waveform v of the differential voltage detecting means 7 has a waveform v 2 that first projects to the − side and then a waveform v 1 that projects to the + side.
【００１３】図５（ａ）に示すように、帯状部材３のス
プライス部３ａが正常な突き合わせ状態の場合は、スプ
ライス部３ａによる磁気抵抗の変化が発生せず、磁気抵
抗検出素子５ａ，５ｂの磁気バランスはくずれない。そ
のため、差電圧検出手段７の出力波形ｖは、規則的に埋
設された金属コードｍのピッチに起因し、図５（ｂ）に
示すようにようになる。As shown in FIG. 5 (a), when the splice portion 3a of the belt-shaped member 3 is in a normal butted state, the change in magnetic resistance due to the splice portion 3a does not occur, and the magnetic resistance detecting elements 5a and 5b are not changed. The magnetic balance does not collapse. Therefore, the output waveform v of the differential voltage detecting means 7 is as shown in FIG. 5B due to the pitch of the metal cords m which are regularly embedded.
【００１４】従って本発明は、並設された磁気抵抗検出
素子５ａ，５ｂの検出領域内を該並設方向に沿って、規
則的に配列された金属コードｍを有する帯状部材３のス
プライス部３ａを通過させ、磁気抵抗の変化により磁気
抵抗検出素子５ａ，５ｂが検出した電圧の差から金属コ
ード入り帯状部材３のスプライス部３ａの状態を、誤検
出することなく、常に正確に検出することが可能であ
る。Therefore, according to the present invention, the splice portion 3a of the strip-shaped member 3 having the metal cords m regularly arranged in the detection regions of the magnetoresistive detecting elements 5a and 5b arranged in parallel along the juxtaposed direction. The state of the splice part 3a of the strip member 3 with the metal cord can be always accurately detected from the difference in voltage detected by the magnetoresistive detection elements 5a and 5b due to the change in magnetic resistance. It is possible.
【００１５】続いて、差電圧検出手段７の出力波形ｖは
波形整形手段９に入力され、図６（ａ），（ｂ），
（ｃ）に示すように、＋側及び−側がそれぞれ所定のス
レッショルド値Ｓ+ ，Ｓ- で各々２値化され、波形整形
される。この２値化された＋側及び−側の出力信号は、
位相順に判定処理手段１１に入力され、その位相順から
判定処理手段１１が演算処理して、帯状部材３のスプラ
イス部３ａの状態を判定する。Subsequently, the output waveform v of the differential voltage detecting means 7 is input to the waveform shaping means 9, and the waveforms shown in FIGS. 6 (a), 6 (b),
As shown in (c), the + side and the − side are binarized with predetermined threshold values S + and S − , respectively, and the waveform is shaped. The binarized + side and-side output signals are
The determination processing means 11 is input in the phase order, and the determination processing means 11 performs arithmetic processing from the phase order to determine the state of the splice portion 3a of the band-shaped member 3.
【００１６】即ち、＋側の信号、続いて−側の信号が判
定処理手段１１に入力されると、判定処理手段１１は帯
状部材３のスプライス部３ａがオープンの状態にあると
判定する。−側の信号、続いて＋側の信号が判定処理手
段１１に入力されると、判定処理手段１１は帯状部材３
のスプライス部３ａがラップの状態にあると判定する。
所定の時間内に、＋側の信号及び−側の信号が判定処理
手段１１に入力されない場合には、判定処理手段１１は
帯状部材３のスプライス部３ａが突き合わされた状態に
あると判定する。That is, when the + side signal and then the − side signal are input to the determination processing means 11, the determination processing means 11 determines that the splice portion 3a of the strip-shaped member 3 is in the open state. When the − side signal and then the + side signal are input to the determination processing means 11, the determination processing means 11 causes the strip-shaped member 3
It is determined that the splice portion 3a of 1 is in the wrapped state.
When the + side signal and the − side signal are not input to the determination processing means 11 within a predetermined time, the determination processing means 11 determines that the splice portions 3a of the strip-shaped members 3 are in abutment with each other.
【００１７】判定処理手段１１の出力信号は、図示せぬ
表示手段や自動スプライス装置の制御部等に送出され、
各々の用途に使用される。上述した実施例において、本
発明は、金属コードｍを規則的に配列した帯状部材のス
プライス部の状態検出であれば特に限定されないが、例
えば、タイヤの構成部材であるカーカスやベルト等のス
プライス部の状態を検出するのに好ましく用いることが
出来る。また、ドラム１を回転してスプライス部の状態
を検出する代わりに、磁気抵抗検出手段５の方を移動さ
せることも可能であり、本発明は上述した実施例の態様
に限定されるものではないことは言うまでもない。The output signal of the judgment processing means 11 is sent to a display means (not shown), a control section of the automatic splicing device, etc.,
Used for each purpose. In the above-described embodiment, the present invention is not particularly limited as long as it detects the state of the splice portion of the belt-shaped member in which the metal cords m are regularly arranged. It can be preferably used for detecting the state of. Further, instead of rotating the drum 1 to detect the state of the splice portion, the magnetic resistance detecting means 5 can be moved, and the present invention is not limited to the embodiment described above. Needless to say.
【００１８】[0018]
【発明の効果】本発明は上記のように、並設された磁気
抵抗検出素子の検出領域内を該並設方向に沿って帯状部
材のスプライス部を通過させることにより、帯状部材の
スプライス部の状態に応じた磁気抵抗変化を並設した磁
気抵抗検出素子に作用させ、磁気抵抗検出素子間に明ら
かな電圧の差を生じることが出来るので、金属コード入
り帯状部材のスプライス部の状態を、その状態に応じて
誤検出を招くことなく、常に正確に検出することが出来
る。As described above, according to the present invention, the splice portion of the strip-shaped member is made to pass by passing the splice portion of the strip-shaped member through the detection region of the magnetoresistive detection elements arranged in parallel along the parallel arrangement direction. Since the magnetoresistive change element according to the state is acted on the side-by-side magnetoresistive detecting elements and a clear voltage difference can be generated between the magnetoresistive detecting elements, the state of the splice portion of the strip member with the metal cord is changed to It is possible to always detect accurately without causing erroneous detection depending on the state.
【図１】本発明の金属コード入り帯状部材スプライス部
の状態検出方法に用いられる装置の概略説明図である。FIG. 1 is a schematic explanatory view of an apparatus used in the method for detecting the state of a band-shaped member splice portion containing a metal cord according to the present invention.
【図２】図１の磁気抵抗検出手段の説明図である。FIG. 2 is an explanatory diagram of a magnetic resistance detection unit of FIG.
【図３】（ａ）はスプライス部がオープンの状態を示す
説明図、（ｂ）は差電圧検出手段の出力波形を示す説明
図である。3A is an explanatory diagram showing a state in which a splice portion is open, and FIG. 3B is an explanatory diagram showing an output waveform of a differential voltage detecting means.
【図４】（ａ）はスプライス部がラップの状態を示す説
明図、（ｂ）は差電圧検出手段の出力波形を示す説明図
である。4A is an explanatory diagram showing a state in which a splice portion is wrapped, and FIG. 4B is an explanatory diagram showing an output waveform of a differential voltage detecting means.
【図５】（ａ）はスプライス部が突き合わせの状態を示
す説明図、（ｂ）は差電圧検出手段の出力波形を示す説
明図である。FIG. 5A is an explanatory diagram showing a state where the splice portions are butted, and FIG. 5B is an explanatory diagram showing an output waveform of the differential voltage detecting means.
【図６】（ａ）は整形前の波形を示す説明図、（ｂ）は
＋側の波形を整形した状態を示す説明図、（ｃ）は−側
の波形を整形した状態を示す説明図である。6A is an explanatory diagram showing a waveform before shaping, FIG. 6B is an explanatory diagram showing a state where a + side waveform is shaped, and FIG. 6C is an explanatory diagram showing a state where a − side waveform is shaped. Is.
３ 帯状部材 ３ａ スプライス部 ５ 磁気抵抗検出手段 ５ａ，５ｂ 磁気抵
抗検出素子 ７ 差電圧検出手段 ９ 波形整形手段 １１ 判定処理手段 ｍ 金属コード3 band-shaped member 3a splice part 5 magnetic resistance detection means 5a, 5b magnetic resistance detection element 7 differential voltage detection means 9 waveform shaping means 11 judgment processing means m metal code
Claims (1)
内を該並設方向に沿って、前記並設方向と交差する方向
に規則的に配列された金属コードを有する帯状部材のス
プライス部を通過させ、該スプライス部の状態に応じて
変化する磁気抵抗により、前記並設された磁気抵抗検出
素子に検出された電圧の差から前記スプライス部の状態
をオープン、ラップ、或いは突き合わせと判定する金属
コード入り帯状部材スプライス部の状態検出方法。1. A splice part of a strip-shaped member having metal cords which are regularly arranged in a detection area of the magnetoresistive detecting elements arranged in parallel along the direction of parallel arrangement in a direction intersecting with the direction of parallel arrangement. And the state of the splice portion is determined to be open, lap, or butt from the difference in voltage detected by the magnetoresistive detection elements arranged in parallel by the magnetic resistance that changes according to the state of the splice portion. A method for detecting the state of a splice part of a band-shaped member containing a metal cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150731A JPH079585A (en) | 1993-06-22 | 1993-06-22 | Detection of condition of splice part of metal cord-containing belt like member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150731A JPH079585A (en) | 1993-06-22 | 1993-06-22 | Detection of condition of splice part of metal cord-containing belt like member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH079585A true JPH079585A (en) | 1995-01-13 |
Family
ID=15503187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5150731A Pending JPH079585A (en) | 1993-06-22 | 1993-06-22 | Detection of condition of splice part of metal cord-containing belt like member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079585A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005148049A (en) * | 2003-10-23 | 2005-06-09 | Yokohama Rubber Co Ltd:The | Method and device for detecting foreign matter in tire, tire inspection device, tire molding machine, and tire uniformity machine |
| JP2008094046A (en) * | 2006-10-16 | 2008-04-24 | Bridgestone Corp | Inspection method of steel cord arrangement direction and apparatus used therefor |
-
1993
- 1993-06-22 JP JP5150731A patent/JPH079585A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005148049A (en) * | 2003-10-23 | 2005-06-09 | Yokohama Rubber Co Ltd:The | Method and device for detecting foreign matter in tire, tire inspection device, tire molding machine, and tire uniformity machine |
| JP2008094046A (en) * | 2006-10-16 | 2008-04-24 | Bridgestone Corp | Inspection method of steel cord arrangement direction and apparatus used therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH06317563A (en) | Damage detector and detecting method for permeability component | |
| JPWO2019150539A1 (en) | Wire rope inspection equipment, wire rope inspection system and wire rope inspection method | |
| JPH079585A (en) | Detection of condition of splice part of metal cord-containing belt like member | |
| KR970000282Y1 (en) | Defect detector for stretched metal strip | |
| US4297585A (en) | System for the detection of splicing defects in film | |
| JP3971895B2 (en) | Differential magnetic sensor device | |
| CA1242504A (en) | Device for the detection of longitudinal cracking in conveyor belt | |
| WO2023073189A1 (en) | Fabric belt splice monitoring | |
| JPS63196412A (en) | Steel cord conveyor belt disconnection detection device | |
| JPH07294490A (en) | Magnetic flaw detection method with excellent diagonal flaw detection performance | |
| CN107073854B (en) | Method and apparatus for controlling the manufacture and feeding of semifinished products in a tyre building process | |
| JP2001074614A (en) | Tire inspecting apparatus | |
| JPH085579B2 (en) | Web joining method | |
| US5953953A (en) | Apparatus and method for detecting a splice in a running length of web | |
| JP4048256B2 (en) | Magnetic flux leakage flaw detector | |
| JP2001307283A (en) | Road monitoring device | |
| JP2001201335A (en) | Measuring method and measuring device for both end positions in width direction of sheet material | |
| JPH08315651A (en) | Cable bump defect detector | |
| JPS5863662A (en) | Yarn separation detector for doubled yarn winder | |
| JPH0638991B2 (en) | How to detect steel strip welds | |
| JP2769534B2 (en) | Array structure of magnetic sensors in thin steel strip magnetic testing equipment | |
| JP4039889B2 (en) | Method and apparatus for inspecting joint portion of belt-shaped member | |
| KR100426849B1 (en) | Method of setting automatically detection sensitivity of steel piece detector by belt joint unit of steel cord belt to be actively changed to detection performance change of detector | |
| SU1254364A1 (en) | Device for checking strength of rubber-cable conveyer belt | |
| KR102430052B1 (en) | Discrimination device of connection part |