WO2017082030A1 - ゴムシート内のコードカウント方法 - Google Patents
ゴムシート内のコードカウント方法 Download PDFInfo
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- WO2017082030A1 WO2017082030A1 PCT/JP2016/081438 JP2016081438W WO2017082030A1 WO 2017082030 A1 WO2017082030 A1 WO 2017082030A1 JP 2016081438 W JP2016081438 W JP 2016081438W WO 2017082030 A1 WO2017082030 A1 WO 2017082030A1
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- center position
- cords
- data
- rubber sheet
- correction data
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/2518—Projection by scanning of the object
- G01B11/2522—Projection by scanning of the object the position of the object changing and being recorded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/27—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
- B29D2030/381—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre the inserts incorporating reinforcing parallel cords; manufacture thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
Definitions
- the present invention relates to a code counting method in a rubber sheet that can easily and accurately count the number of cords embedded in the rubber sheet.
- a pneumatic tire having a structure in which a band layer is provided outside the belt layer is known.
- this band layer is formed by winding a narrow belt-like ply 4 in a spiral shape in the tire circumferential direction.
- the narrow belt-like ply 4 includes a plurality of cords 3 embedded in the rubber g at intervals.
- the narrow strip-like ply 4 is formed by cutting a wide ply material a by a plurality of cutters b as shown in FIG. 8B.
- the primary ply material a1 having a width of about 1450 mm, which is the top opposite, is once cut into a secondary ply material a2 having a width of about 100 mm.
- the secondary ply material a2 is further cut into the narrow strip ply 4 having a width of about 10 mm.
- each of the narrow belt-like plies 4 needs to have a prescribed number of cords 3. Therefore, conventionally, the cords embedded in the primary and secondary ply materials a1 and a2 are visually counted. A mark is provided for each position where the number of codes becomes the specified number, and a cutting cutter b is disposed at each mark position (see, for example, Patent Document 1).
- the invention is based on performing a predetermined correction process on the raw waveform data of the irregularities on the outer surface obtained by scanning the displacement sensor, while improving the reliability and accuracy of the code embedded in the rubber sheet, It is an object of the present invention to provide a code counting method in a rubber sheet that can be counted efficiently.
- the present invention is a cord counting method for counting the number of cords from one end in the width direction of the rubber sheet in a rubber sheet in which n cords are embedded at intervals in rubber, On the outer surface of the rubber sheet, the convex portions where the cords are located and the concave portions between the cords are alternately repeated,
- the code counting method is: 1) Scanning the outer surface of the rubber sheet in the width direction with a displacement sensor to obtain raw waveform data of the irregularities on the outer surface (S1); 2) A step of performing a moving average process on the raw waveform data to obtain first correction data of a smooth waveform with reduced noise (S2); 3) obtaining second correction data obtained by converting the amplitude center of the waveform of the first correction data into a straight line (S3); 4) A step of acquiring concave center position data in the width direction with the position of the lowest point of each valley in the waveform of the second correction data as the concave center position between the codes (S4); 5) In the recess center position
- the step (S2) performs a moving average process in a range of 20 to 30% of the average pitch interval of the code.
- the upper limit threshold Kmax is in the range of 120 to 150% of the average pitch interval
- the lower limit threshold Kmin is in the range of 50 to 80% of the average pitch interval. It is preferable that
- the present invention is configured as described above, it is possible to count the codes embedded in the rubber sheet with high work efficiency while improving the reliability and accuracy.
- the code counting method (hereinafter referred to as “code counting method”) in the rubber sheet of the present embodiment acquires step S ⁇ b> 1 for obtaining raw waveform data D ⁇ b> 1 and first correction data D ⁇ b> 2.
- Step S2 Step S3 for obtaining the second correction data D3,
- Step S4 for obtaining the concave portion center position data D4,
- Step S5 for obtaining the first concave portion center position correction data D5, and the second concave portion center Step S6 for obtaining position correction data D6.
- the cord 3 embedded in the rubber sheet 2 is counted from one end E1 in the width direction of the rubber sheet 2.
- the code counting method is used to cut a narrow belt-like ply 4 for forming a band layer of a pneumatic tire from a rubber sheet 2 which is a ply material a.
- the cord 3 in the rubber sheet 2 is counted from the one end E1, and a mark is provided for each separating position where the number of cords is a specified number.
- the rubber sheet 2 is cut into a plurality of narrow strip plies 4 having the same number of cords (specified number) by arranging a cutter at the position of each mark.
- the rubber sheet 2 includes n cords 3 embedded in the rubber g.
- Each cord 3 is arranged at intervals in the width direction of the rubber sheet 2.
- the outer surface 2s of the rubber sheet 2 is formed as an uneven surface in which the convex portion 5 where the cord 3 is located and the concave portion 6 between the cords 3 and 3 are alternately repeated.
- step S1 the outer surface 2s of the rubber sheet 2 is scanned in the width direction (x direction) by the displacement sensor 7.
- the raw waveform data D1 shown by a solid line in FIG. 3 of the unevenness of the outer surface 2s is obtained.
- the displacement sensor 7 for example, a non-contact type sensor such as a laser displacement meter is suitably employed.
- step S2 the raw waveform data D1 is corrected by moving average processing.
- first correction data D2 shown by a broken line in FIG. 3 having a smooth waveform with reduced noise is obtained.
- this moving average process it is preferable to perform a moving average in the range of 20 to 30% of the average pitch interval P of the cord 3 (shown in FIG. 2). If it is less than 20%, it is difficult to sufficiently reduce the noise. Conversely, if it exceeds 30%, it is difficult to accurately obtain the position of the uneven peak.
- second correction data D3 is obtained as shown in FIG.
- the second correction data D3 is data obtained by converting the amplitude center j of the waveform of the first correction data D2 into a straight line.
- the amplitude of the second correction data D3 is shown enlarged.
- M be the midpoint in the y direction.
- the amplitude center j is a curve passing through each midpoint M, and can be obtained by regression analysis of each midpoint M.
- the waveform of the second correction data D3 is obtained by replacing the amplitude center j with a straight line in the width direction (x direction).
- step S4 concave center position data D4 in the width direction is obtained.
- the recess center position data D4 is data of the center position Q in the width direction (x direction) of each recess 6 and corresponds to data of the center position in the width direction (x direction) between the cords 3 and 3.
- the position data in the width direction (x direction) of the lowest point 11b (corresponding to the top portion 11a) of each valley portion 11 in the waveform of the second correction data D3 is the concave portion center position data D4.
- Adopt as.
- step S5 as shown in FIG. 6, in the recess center position data D4, the interval K between the recess center positions Q and Q adjacent in the width direction (x direction), the preset upper limit threshold value Kmax and the lower limit threshold value are set. Addition / deletion of the recess center position Q is performed in comparison with Kmin.
- the interval K and the upper limit threshold value Kmax are sequentially compared.
- K> Kmax a correction concave center position Q1 is added to the center of the interval K.
- the interval K and the lower limit threshold value Kmin are sequentially compared.
- K ⁇ Kmin the recess center position Qa on the front side in the scanning direction is deleted from the recess center positions Q and Q on both sides across the interval K.
- first recess center position correction data D5 from which the recess center position Q has been removed is obtained.
- the interval K with the upper threshold Kmax and the lower threshold Kmin the interval K with a high possibility of erroneous data is detected. Further, by removing the concave portion center position Q with respect to the interval K, it is possible to approach correct data.
- the upper threshold Kmax is preferably in the range of 120 to 150% of the average pitch interval P
- the lower limit threshold Kmin is preferably in the range of 50 to 80% of the average pitch interval P.
- step S5 due to the addition / deletion of the recess center position Q, the total number m of the recess center positions Q may not match the actual number of recesses 6.
- step S6 is performed.
- the total number m of the recess center positions Q in the first recess center position correction data D5 is compared with the number n to add / delete the recess center position Q.
- the second recess center position correction data D6 (not shown) closer to the correct data can be obtained.
- the count number of the recess center position Q in the second recess center position correction data D6 can be regarded as the count number of the code 3 in the rubber sheet 2.
- the cords 3 can be accurately partitioned from the one end E1 in the width direction for each specified number.
- the said division position is calculated
- a plurality of displacement sensors 7 can be used.
- step S1 raw waveform data D1 is acquired for each displacement sensor 7.
- steps S2 and S3 first and second correction data D2 and D3 are obtained for each raw waveform data D1.
- step S4 for each second correction data D3, the recess center position data D4 is acquired, and the recess center positions Q of the recess center position data D4 are overlapped and averaged. That is, one averaged recess center position data D4 is obtained.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Tyre Moulding (AREA)
Abstract
Description
前記ゴムシートの外表面には、前記コードが位置する凸部と、コード間となる凹部とが交互に繰り返されるとともに、
前記コードカウント方法は、
1)変位センサにより、前記ゴムシートの外表面を幅方向にスキャンし、前記外表面の凹凸の生波形データを取得するステップ(S1)と、
2)前記生波形データを移動平均処理suru し、ノイズを減じた滑らかな波形の第1の補正データを取得するステップ(S2)と、
3)前記第1の補正データの波形の振幅中心を直線に変換した第2の補正データを取得するステップ(S3)と、
4)前記第2の補正データの波形における各谷部の最下点の位置を、前記コード間の凹部中心位置とした幅方向の凹部中心位置データを取得するステップ(S4)と、
5)前記凹部中心位置データにおいて、幅方向で隣り合う凹部中心位置間の間隔Kと、予め設定した上限閾値Kmax とを比較し、K>Kmax のとき、その間隔Kの中央に、補正用の凹部中心位置を追加するとともに、前記間隔Kと、予め設定した下限閾値Kmin とを比較し、K<Kmin のとき、その間隔Kを挟む両側の凹部中心位置のうちスキャン方向前側の凹部中心位置を削除して第1の凹部中心位置補正データを取得するステップ(S5)と、
6)前記第1の凹部中心位置補正データにおける凹部中心位置の総数mと、前記数nとを比較し、
m<(n-1)のとき、m=(n-1)となるまで、最も大きい間隔Kから順に、該間隔Kの中央に、補正用凹部中心位置を追加するとともに、
m>(n-1)のとき、m=(n-1)となるまで、最も小さい間隔Kから順に、その間隔Kを挟む両側の凹部中心位置のうちスキャン方向前側の凹部中心位置を削除して第2の凹部中心位置補正データを取得するステップ(S6)とを含み、
7)前記第2の凹部中心位置補正データにおける前記凹部中心位置の幅方向一端からのカウント数を、前記幅方向一端からのコードの数と見なすことを特徴としている。
図1に示すように、本実施形態のゴムシート内のコードカウント方法(以下「コードカウント方法」という。)は、生波形データD1を取得するステップS1と、第1の補正データD2を取得するステップS2と、第2の補正データD3を取得するステップS3と、凹部中心位置データD4を取得するステップS4と、第1の凹部中心位置補正データD5を取得するステップS5と、第2の凹部中心位置補正データD6を取得するステップS6とを具える。そして、ゴムシート2内に埋設されるコード3を、ゴムシート2の幅方向一端E1からカウントする。
P=W/n ---(1)
2s 外表面
3 コード
5 凸部
6 凹部
7 変位センサ
11 谷部
11b 最下点
D1 生波形データ
D2 第1の補正データ
D3 第2の補正データ
D4 凹部中心位置データ
D5 第1の凹部中心位置補正データ
D6 第2の凹部中心位置補正データ
E1 一端
j 振幅中心
P 平均ピッチ間隔
Q 凹部中心位置
S1~S6 ステップ
Claims (3)
- ゴム中にn本のコードが間隔を隔てて埋設されたゴムシートにおいて、前記ゴムシートの幅方向一端からコードの数をカウントするコードカウント方法であって、
前記ゴムシートの外表面には、前記コードが位置する凸部と、コード間となる凹部とが交互に繰り返されるとともに、
前記コードカウント方法は、
1)変位センサにより、前記ゴムシートの外表面を幅方向にスキャンすることにより、前記外表面の凹凸の生波形データを取得するステップ(S1)と、
2)前記生波形データが移動平均処理された第1の補正データを取得するステップ(S2)と、
3)前記第1の補正データの波形の振幅中心が直線に変換された第2の補正データを取得するステップ(S3)と、
4)前記第2の補正データの波形における各谷部の最下点の位置を、前記コード間の凹部中心位置と見なした幅方向の凹部中心位置データを取得するステップ(S4)と、
5)前記凹部中心位置データにおいて、幅方向で隣り合う凹部中心位置間の間隔Kと、予め設定した上限閾値Kmax とを比較し、K>Kmax のとき、その間隔Kの中央に、補正用の凹部中心位置を追加するとともに、前記間隔Kと、予め設定した下限閾値Kmin とを比較し、K<Kmin のとき、その間隔Kを挟む両側の凹部中心位置のうちスキャン方向前側の凹部中心位置を削除することにより第1の凹部中心位置補正データを取得するステップ(S5)と、
6)前記第1の凹部中心位置補正データにおける凹部中心位置の総数mと、前記数nとを比較し、
m<(n-1)のとき、m=(n-1)となるまで、最も大きい間隔Kから順に、該間隔Kの中央に、補正用の凹部中心位置を追加するとともに、
m>(n-1)のとき、m=(n-1)となるまで、最も小さい間隔Kから順に、その間隔Kを挟む両側の凹部中心位置のうちスキャン方向前側の凹部中心位置を削除することにより第2の凹部中心位置補正データを取得するステップ(S6)とを含み、
7)前記第2の凹部中心位置補正データにおける前記凹部中心位置の幅方向一端からのカウント数を、前記幅方向一端からのコードの数と見なすことを特徴とするゴムシート内のコードカウント方法。 - 前記ステップ(S2)の移動平均処理は、前記コードの平均ピッチ間隔の20~30%の範囲で行われることを特徴とする請求項1記載のゴムシート内のコードカウント方法。
- 前記ステップ(S5)において、前記上限閾値Kmax は、前記コードの平均ピッチ間隔の120~150%の範囲、かつ下限閾値Kmin は、前記平均ピッチ間隔の50~80%の範囲であることを特徴とする請求項1又は2記載のゴムシート内のコードカウント方法。
Priority Applications (4)
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US15/769,499 US10458786B2 (en) | 2015-11-11 | 2016-10-24 | Method for counting cords in rubber sheet |
EP16863994.6A EP3366462B1 (en) | 2015-11-11 | 2016-10-24 | Method for counting cords in rubber sheet |
JP2017514729A JP6753393B2 (ja) | 2015-11-11 | 2016-10-24 | ゴムシート内のコードカウント方法 |
CN201680062561.1A CN108349181B (zh) | 2015-11-11 | 2016-10-24 | 橡胶板内的帘线计数方法 |
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JP2015221080 | 2015-11-11 | ||
JP2015-221080 | 2015-11-11 |
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EP (1) | EP3366462B1 (ja) |
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CN (1) | CN108349181B (ja) |
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Publication number | Publication date |
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CN108349181B (zh) | 2020-08-18 |
JPWO2017082030A1 (ja) | 2018-08-30 |
US20180306576A1 (en) | 2018-10-25 |
US10458786B2 (en) | 2019-10-29 |
JP6753393B2 (ja) | 2020-09-09 |
EP3366462B1 (en) | 2021-12-08 |
EP3366462A4 (en) | 2019-06-05 |
EP3366462A1 (en) | 2018-08-29 |
CN108349181A (zh) | 2018-07-31 |
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