WO2016009509A1 - Dispositif pour détecter une position d'extrémité de ruban métallique - Google Patents

Dispositif pour détecter une position d'extrémité de ruban métallique Download PDF

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Publication number
WO2016009509A1
WO2016009509A1 PCT/JP2014/068922 JP2014068922W WO2016009509A1 WO 2016009509 A1 WO2016009509 A1 WO 2016009509A1 JP 2014068922 W JP2014068922 W JP 2014068922W WO 2016009509 A1 WO2016009509 A1 WO 2016009509A1
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WIPO (PCT)
Prior art keywords
coil
divided
metal strip
coils
end position
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Ceased
Application number
PCT/JP2014/068922
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English (en)
Japanese (ja)
Inventor
知之 小林
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Nireco Corp
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Nireco Corp
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Priority to PCT/JP2014/068922 priority Critical patent/WO2016009509A1/fr
Publication of WO2016009509A1 publication Critical patent/WO2016009509A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques

Definitions

  • the present invention relates to a metal strip end position measuring device for measuring an end position of at least one side of a metal strip having a predetermined width conveyed in a certain direction.
  • Patent Document As an apparatus of this type, there is an apparatus in which a pair of transmission coils and reception coils are arranged on the right and left ends in the conveying direction of the metal strip so that the metal strip is sandwiched without contact from the plate thickness direction (Patent Document). 1, 2).
  • the end position of the metal strip can be measured by determining the magnitude of the voltage induced in the receiving coil. For example, when the end position measured by the right receiving coil is PR and the end position measured by the left receiving coil is PL, the deviation (meandering amount) of the metal strip from the line center is ( PR-PL) / 2.
  • the length of each of the transmitting coil and the receiving coil in the direction perpendicular to the metal strip conveyance direction needs to be a length that can cover the meandering amount of the maximum width of the metal strip, and is usually about 1 m long. Is needed.
  • Patent Document 2 the metal sheet is cut out by a laser beam to form a transmission coil and a reception coil, thereby ensuring accuracy when realizing a long transmission coil and reception coil. Large-scale equipment is required.
  • the object of the present invention is to be able to accurately measure the end position of a metal strip while using a transmission coil and a reception coil formed on a short printed circuit board, and to cope with various types of metal strips having different widths.
  • An object of the present invention is to provide a metal strip end position measuring apparatus.
  • the metal strip end position measuring apparatus is configured such that at least one end of a metal strip having a predetermined width conveyed in a predetermined direction is not contacted from the thickness direction of the metal strip.
  • a sensor unit having a transmission coil and a reception coil having a predetermined length arranged so that the longitudinal direction is perpendicular to the direction of conveyance and the magnetic field generated by the transmission coil is an electromagnetic wave generated by the metal strip.
  • Strip end position measuring device comprising: a signal processing unit that measures the end position of the metal strip according to the magnitude of the voltage induced in the receiving coil when being input to the receiving coil due to the influence of the influence ,
  • the transmission coils are first, second,..., Nth (N: integer greater than or equal to 2) divided transmission coils printed on mutually independent substrates. Are combined to be arranged side by side on the same plane so that they are longer than each of the divided transmission coils, and the reception coils are printed on mutually independent substrates. ..
  • the N-th divided reception coil is formed to be longer than each of the divided reception coils by combining adjacent end portions side by side on the same plane, and the first divided transmission coil and the first division coil
  • the divided receiving coil, the second divided transmitting coil and the second divided receiving coil, ..., the Nth divided transmitting coil and the Nth divided receiving coil are opposed to each other.
  • the first, second,... the processing unit generates voltages induced in the first, second,..., Nth divided receiving coils in synchronization with driving of the first, second,. Sequentially taking in and measuring the end position of the metal strip.
  • the signal processing unit includes the end position of the metal strip and the first, second,. Are provided with first, second,..., N-th tables indicating the relationship with the induced voltage of the divided receiving coil, and one of the first, second,. The end position is measured based on the voltage.
  • the first, second,... , Second,..., The first, second,..., Nth reference coils whose voltages are induced by driving the N-th divided transmission coil are the first, second,.
  • Each of the signal processing units is mounted in a paired relationship with the N-th divided transmission coil, and the signal processing unit is configured according to the magnitude of the voltage induced in the first, second,.
  • the first, second,..., The temperature of the voltage induced in the Nth receiving coil is corrected.
  • the transmission coil is formed to be longer than each of the divided transmission coils in such a combination that adjacent end portions of the plurality of divided transmission coils are arranged side by side on the same plane
  • the reception coil is a plurality of divided reception coils.
  • the divided transmission coil and the divided reception coil can be sufficiently shortened. Therefore, the divided transmission coil and the divided reception coil can be easily formed on the printed circuit board by ordinary photoetching.
  • the transmission coil and the reception coil are lengthened by combining the divisional transmission coil and the divisional reception coil, it is possible to achieve both of ensuring accuracy and ease of manufacture. Since the length can be arbitrarily set, it is possible to cope with detection of end positions of various types of metal strips having different widths.
  • the voltage induced in a specific divided receiving coil corresponding to a specific divided transmitting coil is affected by another adjacent divided receiving coil. Measurement accuracy can be improved.
  • the specific divided reception coil is utilized by utilizing the temperature characteristics of the voltage induced in the corresponding reference coil. It is possible to compensate for the influence of the voltage induced on the temperature.
  • (A) is a plan view of the right transmitting coil
  • (b) is a plan view of the right receiving coil
  • (c) is a plan view of the left transmitting coil
  • (d) is a plan view of the left receiving coil.
  • (A) is a circuit diagram of one division
  • (b) is a circuit diagram of one division
  • (A) is a reception voltage characteristic diagram of the divided reception coil 120R1, and (b) is a reception voltage characteristic diagram of the division reception coil 120R2.
  • FIG. 1 shows a sensor unit 100 of a metal strip end position measuring apparatus according to an embodiment of the present invention that measures the end position of a metal strip 300 conveyed in the direction of arrow A.
  • 110R is a right transmitting coil
  • 120R is a right receiving coil
  • 110L is a left transmitting coil
  • 120L is a left receiving coil.
  • the right transmitting coil 110R and the right receiving coil 120R sandwich the right edge in the transport direction of the metal strip 300 from the plate thickness direction in a non-contact manner, and the direction perpendicular to the transport direction A of the metal strip 300 is the longitudinal direction.
  • the left transmission coil 110L and the left reception coil 120L also sandwich the left edge of the metal strip 300 in the conveyance direction from the plate thickness direction in a non-contact manner, and the direction perpendicular to the conveyance direction A of the metal strip 300 is the longitudinal direction. Is arranged.
  • FIGS. 2A to 2D show the configurations of the right transmitting coil 110R, the right receiving coil 120R, the left transmitting coil 110L, and the left receiving coil 120L.
  • the right transmission coil 110R includes two divided transmission coils 110R1 and 110R2 each having a length L1 (for example, 570 mm) and a width W1 (for example, 30 mm) formed on the printed circuit board. These substrates are combined on the holder 111R so that the end length L2 (for example, 170 mm) is arranged side by side on the same plane, and the total length is set to the length L3 (for example, 800 mm).
  • the right receiving coil 120R, the left transmitting coil 110L, and the left receiving coil 120L are similarly configured on the holders 121R, 111L, and 121L (FIGS. 2B, 2C, and 2D).
  • the total length L3 of the right transmission coil 110R, the right reception coil 120R, the left transmission coil 110L, and the left reception coil 120L is set to an arbitrary length (for example, 1 m) by appropriately setting the length L2 adjacent to the length L1. (Length exceeding).
  • segmentation reception coil 120R1 are made to oppose on the right side, and the division
  • the divided transmission coils 110R1, 110R2, 110L1, and 110L2 are each composed of four layers of printed coil substrates.
  • the split transmission coil 110R1 As shown in FIG. 3A, three identical substrates formed by photo-etching a coil having, for example, five turns are overlapped so that the coil portions overlap, The coils of each board are connected in series to make 15 turns. Further, a substrate having the same shape in which the reference coil 110RS1 having three turns is formed by photoetching is superimposed on the three-layer substrate so that the coil portions overlap each other. Thereby, the divided transmission coil 110R1 has a total of four layers of printed coil configuration.
  • the divided receiving coils 120R1, 120R2, 120L1, and 120L2 are also each composed of a four-layer printed coil substrate.
  • the divided receiving coil 120R1 will be described as a representative example.
  • four identical substrates formed by photoetching a coil having, for example, 15 turns are overlapped so that the coil portions overlap each other.
  • the substrate coils are connected in series to form 60 turns.
  • FIG. 4 shows circuit blocks of the sensor unit 100 and the signal processing unit 200 of the metal strip end position measuring apparatus.
  • the reference coils 110RS1, 110RS2, 110LS1, and 110LS2 are mounted on the divided transmission coils 110R1, 110R2, 110L1, and 110L2, respectively.
  • the signal processing unit 200 includes a sine wave oscillator 201 that oscillates a high-frequency signal (for example, 80 kHz) that does not affect other devices and is not affected by the other devices, and a sine wave signal that is oscillated by the sine wave oscillator 201.
  • a transmission signal amplifier 202 is provided.
  • the high-frequency voltage amplified by the transmission signal amplifier 202 is repeatedly supplied in time division to the divided transmission coils 110R1, 110R2, 110L1, and 110L2 by switching the switch 203. Further, voltages induced in the reference coils 110RS1, 110RS2, 110LS1, and 110LS2 provided in the divided transmission coils 110R1, 110R2, 110L1, and 110L2 are captured in a time division manner by the switch 204 that switches in synchronization with the switch 203.
  • the voltages induced in the divided reception coils 120R1, 120R2, 120L1, and 120L2 by the time division driving of the divided transmission coils 110R1, 110R2, 110L1, and 110L2 are switched by switches 205 and 206 that are switched in synchronization with the switches 203 and 204, respectively. It is repeatedly taken in time division and amplified by the high frequency amplifier 207.
  • the voltage signal output from the high-frequency amplifier 207 is detected by the detection circuit 210 via the switch 209 after an unnecessary noise component is removed by the band pass filter 208, and becomes a DC component.
  • the DC component is converted into a digital signal by the A / D converter 211 and taken into the microprocessor 212.
  • the voltage induced in the reference coils 110RS1, 110RS2, 110LS1, and 110LS2 taken in a time division manner by the switch 204 is also selected by the switch 209, detected by the detection circuit 2011, and converted to a digital signal by the A / D converter 211. And taken into the microprocessor 212.
  • the switch 209 selects the output of the switch 204 and the output of the band-pass filter 208 in a time-division manner during the period in which the switches 203 to 206 are selecting a specific terminal.
  • the microprocessor 212 has a built-in storage device 212A for storing collected data or temporary data being processed, and a storage device 212B for storing a program for executing processing by the CPU.
  • FIG. 5A and 5 (b) are tables for measuring the end position of the metal strip 300, and are stored in the storage device 212A in advance.
  • FIG. 5A shows the characteristics of the received voltage obtained by processing the voltage induced in the divided receiving coil 12R1 inside the right receiving coil 120R. This characteristic is that as the area of the metal strip 300 located on the lower surface of the divided receiving coil 120R1 increases, that is, the amount of deviation from the line center of the end position of the metal strip 300 in the right direction in the conveyance direction (the center of the conveyance line). The distance between the metal strip 300 and the right end of the metal strip 300 increases, the metal strip 300 becomes an obstacle, and the received voltage decreases.
  • FIG. 5B shows the voltage induced in the outer divided receiving coil 120R2, which also has the same characteristics.
  • the measurement area is divided into 150 to 550 mm and 550 mm to 950 mm by the divided receiving coils 120R1 and 120R2. Yes.
  • FIG. 6 shows the relationship between the receiving coil 120R and the metal strip 300.
  • the inner divided receiving coil 120R1 uses the range of the length L4 from the inner side of the length L1 (the right side in FIG. 6) as the effective measurement region, and uses the region of the length L2 adjacent to the outer divided receiving coil 120R2 as the measurement region. do not do.
  • the table (FIG. 5 (a)) of the divided receiving coil 120R1 is created in the effective measurement area having the length L4.
  • the outer divided receiving coil 120R2 also measures the range of the length L4 from the inside of the length L1 to the effective measurement region, and measures the region of the outer length L2 obtained by subtracting the inner length L4 from the length L1. Do not use as a region.
  • the table (FIG. 5 (b)) of the divided receiving coil 120R2 is created in the effective measurement area having the length L4.
  • the measurement region (length L2) of the overlapping portion of the divided receiving coils 120R1 and 120R2 is measured by the divided receiving coil 120R2.
  • the split receiving coils 120R1 and 120R2 are arranged so that the end portions are arranged side by side, that is, so as not to overlap in the thickness direction, so that the magnetic coupling between them becomes small. For this reason, when the divided reception coil 120R1 detects the magnetic field generated by the divided transmission coil 110R1, it is less affected by the adjacent divided reception coil 120R2, and the measurement accuracy can be improved.
  • receiving coil 120R of FIG. 6 is made to correspond to (a) and (b) of FIG. Is in the range of 550 mm to 950 mm.
  • a similar effective measurement region is set for the divided reception coils 120L1 and 129L2 on the left side in the conveyance direction of the metal strip 300.
  • FIG. 7A is a flowchart for selecting one of the right divided receiving coils 120R1 and 120R2
  • FIG. 7B is a flowchart for selecting one of the left divided receiving coils 120L1 and 120L2.
  • the program is stored in the storage device 212B and executed by the CPU in the microprocessor 212.
  • the received voltage of the inner divided receiving coil 120R1 is a voltage in the effective measurement range (150 mm to 549 mm)
  • the received voltage of the divided receiving coil 120R1 is adopted as the received voltage of the receiving coil 120R.
  • the reception voltage of the outer divided reception coil 120R2 is adopted as the reception voltage of the reception coil 120R.
  • the right end position of the metal strip 300 can be detected by the received voltage.
  • the received voltage of the inner divided receiving coil 120L1 when the received voltage of the inner divided receiving coil 120L1 is in the effective measurement range (550 mm to 950 mm), the received voltage of the divided receiving coil 120L1 is adopted as the received voltage of the receiving coil 120L. Otherwise, the reception voltage of the outer divided reception coil 120L2 is adopted as the reception voltage of the reception coil 120L. Thereby, the left end position of the metal strip 300 can be detected by the received voltage.
  • the intensity of the magnetic field generated in the transmission coils 110R and 110L is determined by the voltage output from the transmission signal amplifier 122.
  • the voltage induced in the reception coils 120R and 120L by the magnetic field is determined by the coils, connection cables, and boards. Since it fluctuates depending on the temperature condition, the measurement result of the end position has a temperature characteristic.
  • the voltage induced in the reference coils 110RS1, 110RS2, 110LS1, and 110LS2 mounted on the divided transmission coils 110R1, 110R2, 110L1, and 110L2 is set to a voltage that varies depending on the temperature, and is matched to the drive timing of the transmission coils. Capture.
  • the microprocessor 212 corrects the voltage induced in the divided receiving coils 120R1, 120R2, 120L1, and 120L2 in accordance with the deviation from the reference value of the induced voltage (the value at the reference temperature). Thereby, the influence of the temperature drift on the measurement result of the end position of the metal strip 300 can be reduced (corrected), and the measurement error can be reduced.
  • the number of divided transmission coils and the number of divided reception coils are two, but three or more may be used. As the number increases, the length L1 of the divided transmission coil and the divided reception coil can be shortened. Then, by adjusting the length L2 of the side-by-side region, it is possible to finely cope with the length required for the transmission coil and the reception coil.
  • the transmission coil and the reception coil are arranged on both the left and right sides in the conveyance direction of the metal strip 300. However, the transmission coil and the reception coil are arranged so that the end position in the lateral direction of the metal strip 300 can be always measured. In this case, the transmission coil and the reception coil need only be arranged on one of the left and right sides of the metal strip 300.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

L'invention concerne un dispositif de détection de la position d'une extrémité d'un ruban métallique pourvu d'une unité de capteur (100) ayant une bobine de transmission (110R) et une bobine de réception (120R) qui prennent en sandwich un bord latéral du ruban métallique (300) à partir de la direction de l'épaisseur et sans contact et sont disposées de telle sorte que leurs directions longitudinales soient orthogonales à une direction de transport et une unité de traitement de signal (200) pour mesurer la position de l'extrémité du ruban métallique (300) en fonction de la grandeur de la tension qui est induite lorsque la bobine de réception (120R) reçoit un champ magnétique qui a été généré par la bobine de transmission (110R) et magnétiquement influencé par le ruban métallique (300). La bobine de transmission (110R) est formée de manière à être plus longue que deux bobines de transmission divisées (110R1, 110R2) à travers la combinaison des bobines de transmission divisées de telle sorte que des extrémités adjacentes des bobines de transmission divisées soient côte-à-côte sur le même plan. La bobine de réception (120R) est formée de manière à être plus longue que deux bobines de réception divisées (120R1, 120R2) à travers la combinaison des bobines de réception divisées de telle sorte que des extrémités adjacentes des bobines de réception divisées soient côte-à-côte sur le même plan. La bobine de transmission divisée (110R1) et la bobine de réception divisée (120R1) sont opposées l'une à l'autre, et la bobine de transmission divisée (110R2) et la bobine de réception divisée (120R2) sont opposées l'une à l'autre.
PCT/JP2014/068922 2014-07-16 2014-07-16 Dispositif pour détecter une position d'extrémité de ruban métallique Ceased WO2016009509A1 (fr)

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PCT/JP2014/068922 WO2016009509A1 (fr) 2014-07-16 2014-07-16 Dispositif pour détecter une position d'extrémité de ruban métallique

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Application Number Priority Date Filing Date Title
PCT/JP2014/068922 WO2016009509A1 (fr) 2014-07-16 2014-07-16 Dispositif pour détecter une position d'extrémité de ruban métallique

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061422A (zh) * 2020-07-31 2022-02-18 Emg自动化有限公司 用于感应地测量金属带的边缘定位的装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53133055A (en) * 1977-04-26 1978-11-20 Nippon Steel Corp Width detecting method for magnetic metal strips
JPH07181002A (ja) * 1991-08-14 1995-07-18 Elmeg Elektro Mechanik Gmbh 金属ストリップ位置の誘電測定方法とその装置
JP2000035307A (ja) * 1998-03-24 2000-02-02 Elektro-Mechanik Gmbh 金属ストリップの誘導的位置測定装置
JP2005114625A (ja) * 2003-10-09 2005-04-28 Nireco Corp 磁性体縁辺位置検出装置
JP2010533847A (ja) * 2007-07-19 2010-10-28 ツェットエフ フリードリヒスハーフェン アクチエンゲゼルシャフト 局所的な測定範囲におけるコイル配置構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53133055A (en) * 1977-04-26 1978-11-20 Nippon Steel Corp Width detecting method for magnetic metal strips
JPH07181002A (ja) * 1991-08-14 1995-07-18 Elmeg Elektro Mechanik Gmbh 金属ストリップ位置の誘電測定方法とその装置
JP2000035307A (ja) * 1998-03-24 2000-02-02 Elektro-Mechanik Gmbh 金属ストリップの誘導的位置測定装置
JP2005114625A (ja) * 2003-10-09 2005-04-28 Nireco Corp 磁性体縁辺位置検出装置
JP2010533847A (ja) * 2007-07-19 2010-10-28 ツェットエフ フリードリヒスハーフェン アクチエンゲゼルシャフト 局所的な測定範囲におけるコイル配置構造

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061422A (zh) * 2020-07-31 2022-02-18 Emg自动化有限公司 用于感应地测量金属带的边缘定位的装置

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