JP2019212701A - Internal electrode lamination number detector of multilayer ceramic capacitor - Google Patents

Abstract

To detect lamination number of the internal electrodes of a multilayer ceramic capacitor in non-contact.SOLUTION: An internal electrode lamination number detector 100 of a multilayer ceramic capacitor comprises a magnetism generating section 31 generating magnetism, a flux density measurement part 32 for measuring flux density in non-contact with the multilayer ceramic capacitor, in such a state that the multilayer ceramic capacitor having lamination direction of the internal electrode aligned with a prescribed direction is located between the magnetism generating section 31 and itself, and a lamination number detector 36 for detecting the lamination number of internal electrodes of the multilayer ceramic capacitor, on the basis of the flux density measured by the flux density measurement part 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an apparatus for detecting the number of laminated internal electrodes of a multilayer ceramic capacitor.

  A multilayer ceramic capacitor having a structure in which a plurality of internal electrodes are stacked via a dielectric layer is known.

  Patent Document 1 discloses an apparatus for measuring the electrical characteristics of an electronic component by bringing a measurement terminal into contact with the electronic component such as a multilayer ceramic capacitor.

  Here, a method of detecting the capacitance of a multilayer ceramic capacitor by bringing a measurement terminal into contact with an external electrode of the multilayer ceramic capacitor is known. Further, the number of laminated internal electrodes can be obtained by detecting the capacitance of the multilayer ceramic capacitor.

JP 2014-153364 A

  However, if the measurement terminal is brought into contact with the external electrode, the external electrode may be damaged or an unexpected impact load may be applied to the multilayer ceramic capacitor.

  The present invention solves the above-described problems, and an object thereof is to provide an apparatus capable of detecting the number of laminated internal electrodes of a multilayer ceramic capacitor in a non-contact manner.

An internal electrode lamination number detection device for a multilayer ceramic capacitor of the present invention is an apparatus for detecting the number of laminations of the internal electrodes of a multilayer ceramic capacitor having a plurality of laminated internal electrodes,
A magnetic generator for generating magnetism;
Magnetic flux density measurement for measuring magnetic flux density in a non-contact manner with the multilayer ceramic capacitor in a state where the multilayer ceramic capacitor in which the lamination direction of the internal electrodes coincides with a predetermined direction is located between the magnetic generation unit And
Based on the magnetic flux density measured by the magnetic flux density measurement unit, the number of layers detection unit that detects the number of layers of the internal electrode of the multilayer ceramic capacitor,
It is characterized by providing.

  A direction adjusting unit that aligns the stacking direction of the internal electrodes of the multilayer ceramic capacitor with the predetermined direction may be further provided.

The multilayer ceramic capacitor further includes a transport unit that passes between the magnetic generation unit and the magnetic flux density measurement unit,
The magnetic flux density measurement unit is configured to obtain at least one of a maximum magnetic flux density and a cumulative magnetic flux density when the multilayer ceramic capacitor passes between the magnetism generation unit and the magnetic flux density measurement unit. ,
The stack number detection unit may be configured to detect the number of stacks of the internal electrodes based on at least one of a maximum magnetic flux density and a cumulative magnetic flux density obtained by the magnetic flux density measurement unit.

  The magnetism generator may be either a permanent magnet or an electromagnet.

  The number-of-stacks detector may be configured to detect the number of layers of the internal electrodes of the plurality of multilayer ceramic capacitors having substantially the same outer dimensions.

  According to the multilayer ceramic capacitor internal electrode lamination number detection device of the present invention, the multilayer ceramic capacitor in which the lamination direction of the internal electrodes coincides with the predetermined direction is located between the magnetism generation unit and the magnetic flux density measurement unit. In the state, the magnetic flux density is measured without contact with the multilayer ceramic capacitor, and the number of laminated internal electrodes is detected based on the measured magnetic flux density, so the number of laminated internal electrodes is detected without contact with the multilayer ceramic capacitor. be able to. Therefore, the external electrode of the multilayer ceramic capacitor can be prevented from being damaged, and an unexpected impact load can be prevented from being applied to the multilayer ceramic capacitor.

It is a perspective view of a multilayer ceramic capacitor. It is sectional drawing when the multilayer ceramic capacitor shown in FIG. 1 is cut | disconnected by the II-II line. It is a side view which shows typically the whole structure of the internal electrode laminated number detection apparatus of the multilayer ceramic capacitor in 1st Embodiment. It is sectional drawing which shows the structure of the capacitor | condenser series containing a multilayer ceramic capacitor. It is a figure which shows the change of the magnetic flux density measured by a magnetic flux density measurement part, when one multilayer ceramic capacitor passes between a magnetism generation part and a magnetic flux density measurement part. It is a figure which shows typically the difference in the magnetic flux density measured by a magnetic flux density measurement part, when the number of lamination | stacking of the internal electrode of a multilayer ceramic capacitor differs. 6 is a histogram showing the relationship between the number of laminated internal electrodes and the number of laminated ceramic capacitors having the number of laminated layers for two types of laminated ceramic capacitors of capacitance A and capacitance B. It is a top view which shows the structure of the internal electrode laminated number detection apparatus of the laminated ceramic capacitor in 2nd Embodiment. It is an enlarged view of the part IX enclosed with the dotted line of FIG.

  Embodiments of the present invention will be described below to specifically describe features of the present invention.

  First, the configuration of the multilayer ceramic capacitor will be described before describing the configuration of the multi-layer ceramic capacitor internal electrode lamination number detecting device of the present invention.

  FIG. 1 is a perspective view of a multilayer ceramic capacitor 1. 2 is a cross-sectional view of the multilayer ceramic capacitor 1 shown in FIG. 1 taken along the line II-II.

  As shown in FIG. 1, the multilayer ceramic capacitor 1 includes a ceramic body 10 and a pair of external electrodes 11 (11a, 11b). The pair of external electrodes 11 (11a, 11b) are arranged so as to face each other as shown in FIGS.

  The ceramic body 10 includes a first main surface 10a and a second main surface 10b, a first side surface 10c and a second side surface 10d, and a first end surface 10e and a second end surface 10f.

  Here, the direction in which the first end surface 10e and the second end surface 10f face each other is the length direction L, the direction in which the first side surface 10c and the second side surface 10d face each other is the width direction W, and the first main surface A direction in which the surface 10a and the second main surface 10b face each other is defined as a thickness direction T.

  The multilayer ceramic capacitor 1 has a substantially rectangular parallelepiped shape as a whole. However, the substantially rectangular parallelepiped includes a rectangular parallelepiped whose corners and ridge lines are chamfered, and a rectangular parallelepiped whose corners and ridge lines are rounded.

The ceramic body 10 can be made of, for example, a material whose main component is a dielectric ceramic. Specific examples of the dielectric ceramic include BaTiO ₃ , CaTiO ₃ , SrTiO ₃ and CaZrO ₃ . For example, subcomponents such as a Mn compound, a Mg compound, a Si compound, a Co compound, a Ni compound, and a rare earth compound may be appropriately added to the ceramic body 10.

  As shown in FIG. 2, a plurality of first internal electrodes 12 a and a plurality of second internal electrodes 12 b are provided inside the ceramic body 10. The first internal electrodes 12a and the second internal electrodes 12b are alternately provided along the thickness direction T.

  In the following description, the first internal electrode 12a and the second internal electrode 12b may be collectively referred to as “internal electrode 12”.

  In the thickness direction T, a dielectric ceramic layer 13 is disposed between the first internal electrode 12a and the second internal electrode 12b. That is, the first internal electrode 12 a and the second internal electrode 12 b that are adjacent in the thickness direction T are opposed to each other with the dielectric ceramic layer 13 interposed therebetween.

  The first internal electrode 12a is drawn out to the first end face 10e. The second internal electrode 12b is drawn out to the second end face 10f. The first internal electrode 12a and the second internal electrode 12b contain, for example, at least one of Cu, Ni, Ag, Pd, an alloy of Ag and Pd, Au, and the like. The first internal electrode 12 a and the second internal electrode 12 b may further include dielectric particles having the same composition system as the ceramic included in the dielectric ceramic layer 13.

  The first external electrode 11a is formed on the entire first end surface 10e of the ceramic body 10, and from the first end surface 10e, the first main surface 10a, the second main surface 10b, and the first It is formed so as to wrap around the side surface 10c and the second side surface 10d. The first external electrode 11a is electrically connected to the first internal electrode 12a.

  The second external electrode 11b is formed on the entire second end surface 10f of the ceramic body 10, and from the second end surface 10f, the first main surface 10a, the second main surface 10b, and the first It is formed so as to wrap around the side surface 10c and the second side surface 10d. The second external electrode 11b is electrically connected to the second internal electrode 12b.

  The first external electrode 11a and the second external electrode 11b contain, for example, at least one of Cu, Ni, Ag, Pd, an alloy of Ag and Pd, Au, and the like.

<First Embodiment>
FIG. 3 is a side view schematically showing the overall configuration of the multilayer ceramic capacitor internal electrode lamination number detection apparatus 100 according to the first embodiment. The multilayer ceramic capacitor internal electrode lamination number detection device 100 detects the number of laminations of internal electrodes of the multilayer ceramic capacitor included in the capacitor series 2 described later.

  FIG. 4 is a cross-sectional view showing the configuration of the capacitor series 2 including the multilayer ceramic capacitor 1 described above. FIG. 4 shows a cross-sectional view of a portion of the capacitor series 2 that passes between a magnetism generating unit 31 and a magnetic flux density measuring unit 32 described later.

  The capacitor series 2 includes a plurality of multilayer ceramic capacitors 1 and a tape 20 having a plurality of accommodating portions 21a that accommodate the plurality of multilayer ceramic capacitors 1 one by one. The tape 20 includes a carrier tape 21 and a cover tape 22.

  The carrier tape 21 is provided with a plurality of accommodating portions 21a at predetermined intervals. In a state where the plurality of multilayer ceramic capacitors 1 are housed one by one in the plurality of housing portions 21a, the cover tape 22 is attached to the carrier tape 21, whereby the multilayer ceramic capacitor 1 is sealed in the housing portion 21a. Yes.

  The multilayer ceramic capacitor internal electrode lamination number detection device 100 according to the first embodiment includes a magnetism generation unit 31, a magnetic flux density measurement unit 32, a transport unit 35, and a lamination number detection unit 36.

  The transport unit 35 includes a first roll 33 and a second roll 34. The capacitor series 2 is wound around the first roll 33. The capacitor train 2 wound around the first roll 33 is sent out and wound around the second roll 34.

  The conveyance unit 35 conveys the capacitor series 2 so as to pass between the magnetism generation unit 31 and the magnetic flux density measurement unit 32. Thereby, the multilayer ceramic capacitor 1 passes between the magnetism generating unit 31 and the magnetic flux density measuring unit 32.

  The plurality of multilayer ceramic capacitors 1 are accommodated in the accommodating portion 21a of the carrier tape 21 in a state where the lamination direction of the first internal electrode 12a and the second internal electrode 12b coincides with a predetermined direction. The stacking direction of the first internal electrode 12a and the second internal electrode 12b is perpendicular to the direction in which the tape 20 passes between the magnetism generating unit 31 and the magnetic flux density measuring unit 32 or the direction in which the tape 20 passes. Direction.

  In this embodiment, the magnetism generating unit 31 and the magnetic flux density measuring unit 32 are arranged so as to face each other in the vertical direction, and the tape 20 is conveyed in the horizontal direction. As shown in FIG. 4, the stacking direction of the internal electrodes 12 of all the multilayer ceramic capacitors 1 coincides with the vertical direction. However, the lamination direction of the internal electrodes 12 of all the multilayer ceramic capacitors 1 may coincide with the horizontal direction.

  The magnetism generator 31 is composed of a permanent magnet or an electromagnet, and generates magnetism. The strength of the magnetic field generated by the magnetism generator 31 is substantially constant. However, the magnetism generator 31 is not limited to a permanent magnet or an electromagnet.

  The magnetic flux density measuring unit 32 includes a magnetic probe and measures the density of magnetic flux generated by the magnetism generating unit 31. For example, a Hall element having a diameter of 0.76 mm is provided at the tip of the magnetic probe.

  In the present embodiment, the magnetic flux density measurement unit 32 is positioned between the magnetic generation unit 31 and the multilayer ceramic capacitor 1 in which the multilayer ceramic capacitor 1 in which the lamination direction of the internal electrodes 12 coincides with a predetermined direction is located. Measure the magnetic flux density without contact. The magnetic flux density is measured every predetermined time or every time the multilayer ceramic capacitor 1 moves a predetermined distance.

  Further, the magnetic flux density measuring unit 32 obtains one of the maximum magnetic flux density and the accumulated magnetic flux density when the multilayer ceramic capacitor 1 passes between the magnetism generating unit 31 and the magnetic flux density measuring unit 32.

  FIG. 5 is a diagram illustrating a change in magnetic flux density measured by the magnetic flux density measuring unit 32 when one multilayer ceramic capacitor 1 passes between the magnetism generating unit 31 and the magnetic flux density measuring unit 32. For example, while the multilayer ceramic capacitor 1 included in the capacitor series 2 passes between the magnetism generating unit 31 and the magnetic flux density measuring unit 32, the magnetic flux density measuring unit 32 measures the magnetic flux density a plurality of times every predetermined time. Thus, the maximum magnetic flux density and the cumulative magnetic flux density can be obtained.

  FIG. 6 is a diagram schematically showing the difference in magnetic flux density measured by the magnetic flux density measuring unit 32 when the number of laminated internal electrodes 12 of the multilayer ceramic capacitor 1 is different. FIG. 6 illustrates an example in which the stacking direction of the internal electrodes 12 of the multilayer ceramic capacitor 1 is a direction (vertical direction) in which the magnetism generating unit 31 and the magnetic flux density measuring unit 32 face each other.

  Among the multilayer ceramic capacitors 1 shown in FIGS. 6A, 6B, and 6C, the number of laminated internal electrodes 12 of the multilayer ceramic capacitor 1 shown in FIG. The number of laminated internal electrodes 12 of the multilayer ceramic capacitor 1 shown in FIG.

  As shown in FIG. 6, the magnetic flux density measured by the magnetic flux density measuring unit 32 increases as the number of stacked internal electrodes 12 increases. Therefore, based on the magnetic flux density measured by the magnetic flux density measuring unit 32, the number of laminated internal electrodes 12 of the multilayer ceramic capacitor 1 can be obtained.

  The same applies to the case where the stacking direction of the internal electrodes 12 is a direction (horizontal direction) orthogonal to the direction in which the magnetism generating unit 31 and the magnetic flux density measuring unit 32 face each other.

  The lamination number detection unit 36 detects the number of laminations of the internal electrodes 12 of the multilayer ceramic capacitor 1 based on the magnetic flux density measured by the magnetic flux density measurement unit 32. Preferably, the lamination number detection unit 36 detects the number of laminations of the internal electrodes 12 of the multilayer ceramic capacitor 1 based on at least one of the maximum magnetic flux density and the cumulative magnetic flux density obtained by the magnetic flux density measurement unit 32. By detecting the number of stacked layers of the internal electrode 12 based on at least one of the maximum magnetic flux density and the cumulative magnetic flux density, the number of stacked layers can be obtained with high accuracy.

  By detecting the number of layers of the internal electrode 12 by the number-of-stacks detection unit 36, the multilayer ceramic capacitors 1 having different capacitances can be distinguished. For example, even when the capacitor series 2 includes a plurality of types of multilayer ceramic capacitors 1 having substantially the same outer dimensions but different capacitances, the number of stacked internal electrodes 12 is detected by the number of stacked layers detection unit 36. By doing so, the multilayer ceramic capacitors 1 having different capacitances can be distinguished.

  By detecting that the capacitor series 2 includes the multilayer ceramic capacitor 1 having different capacitances, the multilayer ceramic capacitor 1 having different capacitances can be removed from the capacitor series 2.

  FIG. 7 shows the relationship between the number of laminated internal electrodes and the number of laminated ceramic capacitors having the number of laminated layers for two types of laminated ceramic capacitors 1 of capacitance A and capacitance B (B> A). It is a histogram which shows. The plurality of multilayer ceramic capacitors having the capacitance A are assumed to have substantially the same capacitance but not the same. Similarly, it is assumed that the plurality of multilayer ceramic capacitors having the electrostatic capacity B are not completely the same, but are substantially the same.

  As shown in FIG. 7, both the multilayer ceramic capacitor with capacitance A and the multilayer ceramic capacitor with capacitance B have a variation in the number of laminated internal electrodes, but the relationship between the number of laminated internal electrodes and the frequency. Are clearly different. Therefore, by detecting the number of stacked internal electrodes by the stack number detecting unit 36, it is possible to clearly distinguish the multilayer ceramic capacitor having the electrostatic capacity A from the multilayer ceramic capacitor having the electrostatic capacity B.

  As described above, according to the multilayer ceramic capacitor internal electrode lamination number detection device 100 in the present embodiment, the number of laminations of the internal electrodes 12 can be detected without contact with the multilayer ceramic capacitor 1. Therefore, when detecting the number of laminated internal electrodes 12, it is possible to prevent the external electrode 11 of the multilayer ceramic capacitor 1 from being damaged and an unexpected impact load from being applied to the multilayer ceramic capacitor 1.

  In addition, by configuring the magnetism generator 31 with either one of a permanent magnet or an electromagnet, the strength of the generated magnetic field can be made substantially constant, and the number of stacked internal electrodes 12 can be detected with high accuracy. Can do.

  In addition, since the number-of-stacks detection unit 36 can detect the number of layers of the internal electrodes 12 of the plurality of multilayer ceramic capacitors 1 having substantially the same outer dimensions, the outer dimensions are substantially the same but the capacitances are different. The multilayer ceramic capacitor 1 can be distinguished.

<Second Embodiment>
FIG. 8 is a plan view showing the configuration of the laminated ceramic capacitor internal electrode lamination number detection device 100A according to the second embodiment. FIG. 9 is an enlarged view of a portion IX surrounded by a dotted line in FIG.

  The multilayer ceramic capacitor internal electrode lamination number detection device 100A according to the second embodiment includes a ball feeder 80, a linear feeder 81, a conveyance unit 82, a direction adjustment unit 83, a magnetic generation unit 31A, and a magnetic flux density measurement unit. 32A and a stacking number detection unit 36A.

  The ball feeder 80 accommodates a plurality of multilayer ceramic capacitors 1. The ball feeder 80 sequentially supplies the multilayer ceramic capacitor 1 to the linear feeder 81 by vibrating.

  The linear feeder 81 transports the multilayer ceramic capacitor 1 and supplies it to the transport unit 82.

  The direction adjusting unit 83 is, for example, a permanent magnet or an electromagnet, and adjusts so that the stacking direction of the internal electrodes 12 of the multilayer ceramic capacitor 1 conveyed by the linear feeder 81 coincides with a predetermined direction. The predetermined direction is a horizontal direction or a vertical direction. For example, when the stacking direction of the internal electrodes 12 is a horizontal direction and the stacking direction of the internal electrodes 12 is made to coincide with the vertical direction, the multilayer ceramic capacitor 1 is rotated by 90 ° by the magnetism generated from the direction adjusting unit 83. The stacking direction of the internal electrodes 12 is made to coincide with the vertical direction.

  The direction adjusting unit 83 matches the stacking direction of the internal electrodes 12 of the multilayer ceramic capacitor 1 with a predetermined direction, so that the multilayer ceramic capacitor 1 in a state where the stacking direction of the internal electrodes 12 matches the predetermined direction, as will be described later. Can be passed between the magnetism generating unit 31A and the magnetic flux density measuring unit 32A.

  The conveyance unit 82 includes a disk-shaped conveyance table 84 that rotates about a central axis 84C. In the present embodiment, the transport table 84 rotates clockwise around the central axis 84C. The transfer table 84 is made of a material that is not easily affected by magnetism.

  The transfer table 84 includes a plurality of recesses 84a. The plurality of recesses 84 a are provided at predetermined intervals along the outer periphery of the transport table 84.

  The multilayer ceramic capacitor 1 is transferred from the linear feeder 81 to the recess 84a of the transfer table 84 at the position P1. The multilayer ceramic capacitor 1 transferred to the recess 84a moves along the circumferential direction around the central axis 84C and is conveyed to the position P3 as the conveyance table 84 rotates.

  The multilayer ceramic capacitor 1 is accommodated in the accommodating portion 85a of the carrier tape 85 from the conveyance table 84 at the position P3. After the multilayer ceramic capacitor 1 is accommodated in the accommodating portion 85 a of the carrier tape 85, a cover tape (not shown) is attached to the carrier tape 85 so as to seal the multilayer ceramic capacitor 1. A capacitor series having the same structure as the described capacitor series 2 is produced.

  As shown in FIG. 9, at position P2, a magnetism generating unit 31A and a magnetic flux density measuring unit 32A are provided. Specifically, a magnetism generation unit 31A and a magnetic flux density measurement unit 32A are provided so as to sandwich the conveyance table 84. In the present embodiment, the magnetism generator 31 </ b> A is provided below the transport table 84, and the magnetic flux density measurement unit 32 </ b> A is provided above the transport table 84. However, a configuration may be adopted in which the magnetism generating unit 31A is provided above the transport table 84 and the magnetic flux density measuring unit 32A is provided below.

  The arrangement positions of the magnetism generating unit 31A and the magnetic flux density measuring unit 32A will be described in more detail. The magnetism generating unit 31A A magnetic flux density measurement unit 32A is provided.

  Note that the arrangement positions of the magnetic generator 31A and the magnetic flux density measurement unit 32A are not limited to the positions shown in FIG. For example, the magnetism generating unit 31A and the magnetic flux density measuring unit 32A may be provided so as to sandwich the linear feeder 81.

  Similar to the first embodiment, the magnetic flux density measurement unit 32A measures the magnetic flux density in a non-contact manner with the multilayer ceramic capacitor 1 in a state where the multilayer ceramic capacitor 1 is positioned between the magnetic generation unit 31A. The stacking direction of the internal electrodes 12 of the multilayer ceramic capacitor 1 accommodated in the recess 84a of the transfer table 84 coincides with a predetermined direction.

  The number-of-stacks detection unit 36A detects the number of layers of the internal electrodes 12 of the multilayer ceramic capacitor 1 based on the magnetic flux density measured by the magnetic flux density measurement unit 32A.

  As described in the first embodiment, the multilayer ceramic capacitors 1 having different capacities can be distinguished based on the detected number of stacked internal electrodes 12. For example, even when a plurality of multilayer ceramic capacitors 1 having the same outer dimensions but different electrostatic capacities are accommodated in the ball feeder 80, the number of stacked internal electrodes is detected by the stack number detecting unit 36A. Thus, it is possible to distinguish the multilayer ceramic capacitors 1 having different capacitances.

  The multilayer ceramic capacitor internal electrode lamination number detection device 100A according to the present embodiment further includes a discharge unit 86. When it is detected that the multilayer ceramic capacitor 1 having a different capacitance is mixed based on the number of layers of the internal electrodes 12 detected by the number-of-stacks detection unit 36A, the discharge unit 86 blows out the gas to The multilayer ceramic capacitor 1 is discharged from 84a. The gas is, for example, air. The monolithic ceramic capacitor 1 discharged from the recess 84a is accommodated in the retreat area 90 located on the radially outer side of the discharge portion 86, and then removed.

  The present invention is not limited to the above embodiment, and various applications and modifications can be made within the scope of the present invention.

  For example, the method of moving the multilayer ceramic capacitor 1 between the magnetism generating unit and the magnetic flux density measuring unit is not limited to the method described in the above-described embodiment. For example, the multilayer ceramic capacitor 1 may pass through a straight path provided between the magnetism generation unit and the magnetic flux density measurement unit.

  In the first embodiment, it has been described that the stacking direction of the internal electrodes 12 of the multilayer ceramic capacitor 1 housed in the housing portion 21a of the carrier tape 21 matches the predetermined direction. However, when the multilayer ceramic capacitor 1 is accommodated in the accommodating portion 21a, the multilayer ceramic capacitor accommodated in the accommodating portion 21a is allowed while allowing the lamination direction of the internal electrodes 12 to be oriented in a direction other than a predetermined direction. It is good also as a structure further provided with the direction adjustment part which makes the lamination | stacking direction of the one internal electrode 12 correspond to a predetermined direction.

1 multilayer ceramic capacitor 2 capacitor series 10 ceramic body 11 (11a, 11b) external electrode 12a first internal electrode 12b second internal electrode 13 dielectric ceramic layer 20 tape 21 carrier tape 21a accommodating portion 22 cover tapes 31 and 31A Magnetic generation unit 32, 32A Magnetic flux density measurement unit 33 First roll 34 Second roll 35 Transport unit 36, 36A Stack number detection unit 80 Ball feeder 81 Linear feeder 82 Transport unit 83 Direction adjustment unit 84 Transport table 84a Recess 85 Carrier Tape 86 Discharge unit 90 Retraction area 100 Multilayer ceramic capacitor internal electrode lamination number detection device 100A in the first embodiment Multilayer ceramic capacitor internal electrode lamination number detection device in the second embodiment

Claims (5)

A device for detecting the number of laminated internal electrodes of a multilayer ceramic capacitor having a plurality of laminated internal electrodes,
A magnetic generator for generating magnetism;
Magnetic flux density measurement for measuring magnetic flux density in a non-contact manner with the multilayer ceramic capacitor in a state where the multilayer ceramic capacitor in which the stacking direction of the internal electrodes coincides with a predetermined direction is located between the magnetic generation unit And
Based on the magnetic flux density measured by the magnetic flux density measurement unit, the number of layers detection unit that detects the number of layers of the internal electrode of the multilayer ceramic capacitor,
A device for detecting the number of laminated internal electrodes of a multilayer ceramic capacitor.   The apparatus for detecting the number of laminated internal electrodes of a multilayer ceramic capacitor according to claim 1, further comprising a direction adjusting unit that aligns the lamination direction of the internal electrodes of the multilayer ceramic capacitor with the predetermined direction. The multilayer ceramic capacitor further includes a transport unit that passes between the magnetic generation unit and the magnetic flux density measurement unit,
The magnetic flux density measurement unit is configured to obtain at least one of a maximum magnetic flux density and a cumulative magnetic flux density when the multilayer ceramic capacitor passes between the magnetism generation unit and the magnetic flux density measurement unit. ,
The stack number detection unit is configured to detect the number of stacks of the internal electrodes based on at least one of a maximum magnetic flux density and a cumulative magnetic flux density obtained by the magnetic flux density measurement unit. The apparatus for detecting the number of laminated internal electrodes of a multilayer ceramic capacitor according to claim 1 or 2.   The apparatus for detecting the number of laminated internal electrodes of a multilayer ceramic capacitor according to any one of claims 1 to 3, wherein the magnetism generator is one of a permanent magnet and an electromagnet.   5. The stack number detection unit is configured to detect the number of stacks of internal electrodes of a plurality of the multilayer ceramic capacitors having substantially the same external dimensions. For detecting the number of laminated internal electrodes of multilayer ceramic capacitors.

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