KR20210026296A - Thickness measuring apparatus - Google Patents

Abstract

The present invention relates to a thickness measurement apparatus and, more specifically, to a thickness measurement apparatus capable of measuring the thickness of a sheet having a thin thickness such as an anodic electrode sheet, a cathodic electrode sheet and the like used for a secondary battery. According to the present invention, the thickness measurement apparatus includes: a first thickness sensor (110) and a second thickness sensor (120) installed to be opposed between sheets (10) transferred by a plurality of rollers; a sensor support part (210) where the first thickness sensor (110) and the second thickness sensor (120) are fixed and installed; a base part (220) where the sensor support part (210) is combined to be able to be reciprocated in a reciprocation section set in a measurement direction which is vertical to a transfer direction of the sheets (10); and a reciprocation driving part (220) reciprocating the sensor support part (210) in the reciprocation section.

Description

Thickness measuring apparatus

The present invention relates to a thickness measuring apparatus, and more particularly, to a thickness measuring apparatus for measuring the thickness of a sheet having a thin thickness, such as a positive electrode sheet and a negative electrode sheet used in secondary batteries.

Secondary cells and storage batteries are devices that convert external electrical energy into chemical energy, store it, and generate electricity when needed. The name "rechargeable battery" is also used to mean that it can be recharged multiple times. Commonly used secondary batteries include lead storage batteries, nickel-cadmium batteries (NiCd), nickel-metal hydride batteries (Ni-MH), lithium ion batteries (Li-ion), and lithium ion polymer batteries.

Meanwhile, the application range of secondary batteries used after electric charging, such as electric vehicles and smartphones, has been greatly expanded.

In particular, the demand for secondary batteries is explosively increasing due to the new development of IOT devices and the expansion of the market.

On the other hand, the secondary battery is manufactured by inserting an electrolyte solution, impregnation, etc., after a stack is formed by stacking a positive electrode sheet and a negative electrode sheet in multiple layers with a separator interposed therebetween.

Here, the positive electrode sheet and the negative electrode sheet constituting the secondary battery are generally subjected to coating, drying, and pressing processes of an electrode active material as in Patent Documents 1 and 2.

On the other hand, when using electric vehicles and smart phones, battery efficiency is an important factor, and it is necessary to maximize battery capacity relative to the same volume.

Accordingly, in a secondary battery having a structure in which a positive electrode sheet, a separator, and a negative electrode sheet are stacked in multiple layers, it is desirable to minimize the thickness of each sheet.

Furthermore, in the case of the positive electrode sheet and the negative electrode sheet coated with the active material, it is preferable that the thickness measured after coating has a predetermined cross-sectional profile over the entire surface.

Meanwhile, since the positive electrode sheet and the negative electrode sheet used in the secondary battery have a thickness of several µm or less, the thickness of the positive electrode sheet and the negative electrode sheet transferred by a roller or the like needs to be accurately measured.

In particular, there is a problem in that there is a thickness measurement error due to the position change of the measurement sensor due to vibration and minute deformation of the installation structure, and the problem is maximized when the measurement range is several μm or less.

(Patent Document 1) KR10-2013-0136607A

(Patent Document 2) KR10-2016-0097775A

An object of the present invention is to provide a thickness measuring apparatus capable of accurately measuring the thickness of a sheet by recognizing the necessity as described above.

The present invention was created to achieve the object of the present invention as described above, the present invention, the first thickness sensor 110 and the second installed to be opposed between the sheet 10 conveyed by a plurality of rollers A thickness sensor 120; A sensor support 210 to which the first thickness sensor 110 and the second thickness sensor 120 are fixedly installed; A base part 220 to which the sensor support part 210 is reciprocally movably coupled within a reciprocating section set in the measurement “‡ direction” perpendicular to the transfer direction of the sheet 10; Disclosed is a thickness measuring device including a reciprocating movement driving unit for reciprocating the sensor support unit 210 within a reciprocating section.

The sheet 10 may be any one of a positive electrode sheet and a negative electrode sheet constituting a secondary battery.

The sheet 10 may be an electrode sheet before coating of an active material, before pressing after coating of an active material, or after coating and pressing of an active material.

The sensor support part 210 has a through opening 211 formed so that the sheet 10 passes, and the first thickness sensor 110 and the second thickness sensor 120 transfer the sheet 10 It may be fixed to at least one of the front and rear surfaces of the sensor support 210 based on the direction.

The first thickness sensor 110 and the second thickness sensor 120 are fixed to any one of the front and rear surfaces of the sensor support 210 based on the transport direction of the sheet 10, A rib may be formed on the second surface of the other of the front and rear surfaces of the sensor support part 210.

The base part 220 may be supported by a seismic structure with respect to the ground.

The base part 220 is provided with a guide rail 250 forming the reciprocating movement section, and the sensor support part 210 is provided by a guide block 260 that reciprocates along the guide rail 250. Can be supported.

The first thickness sensor 110 and the second thickness sensor 120 may be installed on the sensor support part 210 to enable adjustment of a relative distance with respect to the measurement surface of the sheet 10.

The first thickness sensor 110 and the second thickness sensor 120 may be any one of an ultrasonic sensor, a laser sensor, and a confocal sensor.

The confocal sensor may use a multicolor wavelength.

The thickness measuring apparatus according to the present invention accurately measures the thickness of the sheet during the manufacturing process by measuring the thickness of the sheet by measuring the distance to the first and second surfaces based on the sheet conveyed by a plurality of rollers. There is a measurable advantage.

In particular, depending on the thickness of the sheet, there is an advantage that the thickness of the sheet can be accurately measured during the manufacturing process by using an ultrasonic sensor, a laser sensor, as well as a confocal sensor capable of measuring a thickness of several µm or less.

Furthermore, the thickness measurement apparatus according to the present invention enables precise measurement of the thickness of the sheet during the process of the sheet, thereby optimizing the processing conditions for the sheet, especially the processing conditions for the sheet having a thickness having a preset profile. There is an advantage.

In particular, the thickness measuring apparatus according to the present invention enables precise measurement of the thickness of the sheet without measurement errors due to vibrations and minute deformation of the installation structure, and thus the process conditions for the sheet, especially the process of a sheet having a thickness having a preset profile. There is an advantage to be able to optimize the conditions.

1 is a side view showing an example of a thickness measuring apparatus according to the present invention.
2 is a front view of the thickness measuring apparatus of FIG. 1.
3 is an enlarged side view showing an installation state of a first thickness sensor and a second thickness sensor of the thickness measuring apparatus of FIG. 1.
4 is a front view showing another embodiment of a thickness measuring apparatus according to the present invention.
5 is a plan view showing a sheet thickness measurement area of the thickness measuring apparatus of FIG. 1.
6A and 6B are partial front views illustrating examples in which a reinforcing member is installed in a through opening as a modified example of the thickness measuring apparatus of FIG. 1.
Fig. 7 is a cross-sectional view in the direction VI-VI in Fig. 6A.

Hereinafter, a thickness measuring apparatus according to the present invention will be described with reference to the accompanying drawings.

The thickness measuring apparatus according to the present invention, as shown in FIG. 1, is a first thickness sensor 110 and a second thickness sensor 120 that are installed oppositely between sheets 10 transferred by a plurality of rollers. Wow; A sensor support 210 to which the first thickness sensor 110 and the second thickness sensor 120 are fixedly installed; A base part 220 to which the sensor support part 210 is reciprocally movably coupled within a reciprocating section set in the measurement “‡ direction” perpendicular to the transfer direction of the sheet 10; It includes a reciprocating movement driving unit (not shown) for reciprocating the sensor support unit 210 within the reciprocating section.

The sheet 10, which is a thickness measurement object of the thickness measuring apparatus according to the present invention, can be any sheet having a thin thickness, and in particular, a sheet having a thin thickness such as an electrode sheet, a separator, etc. that constitutes interest and requires precise thickness measurement. Any object is possible.

For example, the thickness measuring apparatus according to the present invention is installed in a system that performs a coating process of coating a coating material such as an active material on the surface of an electrode sheet by being wound on a winding roll, and the thickness of the sheet 10 transferred by the winding roll, etc. It can be installed to measure.

By being installed as described above, it is possible to greatly improve the process accuracy of the sheet by measuring the state of the electrode sheet before coating on the electrode sheet, the thickness of the coating film on the electrode sheet after coating, and the like.

That is, the sheet 10, which is a measurement object of the thickness measuring apparatus according to the present invention, is not limited to a specific process step, but can be applied to a state in any process step, for example, pressing before the active material coating or after the active material coating. It may be an electrode sheet before or after coating and pressing of an active material.

That is, if the sheet 10 is configured to measure its thickness in a specific processing step, a configuration located in any processing step can be applied.

Here, the sheet 10 may be any one of a positive electrode sheet and a negative electrode sheet constituting a secondary battery, and in the case of the positive electrode sheet, for example, stainless steel, aluminum, nickel, titanium, calcined carbon, aluminum or stainless steel. The surface can be surface-treated with carbon, etc. In the case of the cathode electrode sheet, it can be used by surface-treated with copper, stainless steel, aluminum, nickel, titanium, calcined carbon, and carbon on the surface of copper or stainless steel. It is not limited thereto.

The first thickness sensor 110 is a configuration that measures the thickness of the sheet 10 by being installed opposite to the second thickness sensor 120 between the sheets 10 conveyed by a plurality of rollers. This is possible.

For example, the first thickness sensor 110 may be an ultrasonic sensor, a laser sensor, a confocal sensor, or the like.

In addition, the first thickness sensor 110 may be a sensor that measures a distance using not only monochromatic light but also multicolor wavelengths when a confocal sensor is used.

That is, the first thickness sensor 110, as a line confocal sensor in a multicolor wavelength band, may measure a distance by emitting light including various wavelength bands and receiving reflected light.

Through this, it is possible to accurately measure the thickness of the sheet 10 in units of several µm, and even when the focus is slightly shaken due to vibrations of the external environment, the thickness of the sheet 10 can be stably measured.

In addition, one or more of the first thickness sensors 110 may be installed on the sensor support 210 to enable thickness measurement at one or more points, for example, a plurality of the first thickness sensors 110 may be installed along the upper side of the through opening 211. .

The second thickness sensor 120 is installed opposite to the first thickness sensor 110 between the sheets 10 conveyed by a plurality of rollers to measure the thickness of the sheet 10, and various configurations This is possible.

The second thickness sensor 120 may use a distance sensor such as an ultrasonic sensor, a laser sensor, and a confocal sensor, like the first thickness sensor 110 described above.

In addition, the second thickness sensor 120 may measure a distance using monochromatic light and multicolor wavelengths, especially when using a confocal sensor.

The second thickness sensor 120 is installed on the sensor support 210 by facing the first thickness sensor 110 and the sheet 10 interposed therebetween, and more specifically, a sensor through which the sheet 10 passes. The sheet is installed to face the sheet 10 through which the first thickness sensor 110 passes in the upper direction with the center of the through opening 211 of the support part 210, and the second thickness sensor 120 passes in the lower direction It can be installed facing toward (10).

In addition, since the second thickness sensor 120 is installed in correspondence with the first thickness sensor 110, one or more of the second thickness sensors 120 may be installed in the sensor support unit 210 corresponding to the position of each first thickness sensor 110, For example, a plurality of through openings 211 may be installed along the lower side.

Meanwhile, the first thickness sensor 110 and the second thickness sensor 120 may be installed on the sensor support 210 to enable adjustment of a relative distance with respect to the measurement surface of the sheet 10.

The principle of measuring the thickness of the sheet 10 by using the first thickness sensor 110 and the second thickness sensor 120 as described above will be described with reference to FIG. 7.

The principle of measuring the thickness of the sheet 10 is, as shown in FIGS. 5 and 7, installed on the upper and lower sides of the sheet 10 to be transferred, and the first thickness sensor 110 and the first thickness sensor for the sheet 10 2 Measure the _{relative distance X 1} , X ₂ with the thickness sensor 120.

_{When the relative distances X 1} and X ₂ between the first thickness sensor 110 and the second thickness sensor 120 with respect to the sheet 10 are measured, between the first thickness sensor 110 and the second thickness sensor 120 The total distance (L) of is a fixed value, and the thickness of the sheet 10 can be measured by subtracting the _{relative distance X 1} and X _{2 from the total distance (L).} .

That is, it can be expressed by the following equation.

The thickness of the sheet 10 (t) = the total distance between the first thickness sensor 110 and the second thickness sensor 120 (L)-(X ₁ + X ₂ )

Meanwhile, as can be seen from the above equation, in measuring the thickness t of the sheet 10, the relative position between the first thickness sensor 110 and the second thickness sensor 120 is very important.

Accordingly, it is necessary to adjust the positions of the first thickness sensor 110 and the second thickness sensor 120 in order to accurately measure the thickness of the sheet 10 before measuring the thickness.

To this end, the first thickness sensor 110 and the second thickness sensor 120 are provided with a sensor support part 210 to enable relative movement and relative rotation in the X-axis, Y-axis, and Z-axis with respect to the sensor support part 210. ) May further include a driving coupling unit 130 coupled to.

The driving coupling unit 130 is provided in the first thickness sensor 110 and the second thickness sensor 120, respectively, and is coupled to the sensor support unit 210, and various configurations are possible.

For example, the drive coupling unit 130, the first thickness sensor 110 and the second thickness sensor 120 in a state coupled to the sensor support unit 210, X-axis with respect to the sensor support unit 210, A driving unit may be provided to enable relative movement and relative rotation in the Y-axis and Z-axis.

Through this, the drive coupling unit 130, the first thickness sensor 110 and the first thickness sensor 110 and the second thickness sensor 120 so that the axis is shared between the first thickness sensor 110 and the second thickness sensor 120 coupled to the sensor support unit 210. 2 The horizontal movement of the thickness sensor 120 can be finely adjusted.

That is, when the axis between the first thickness sensor 110 and the second thickness sensor 120 is not shared and is shifted, precise thickness measurement is impossible, and the first thickness sensor 110 and the second thickness sensor 120 It is possible to make precise thickness measurement possible by aligning the axes of the two sensors through linear movement in the X-axis or Y-axis direction.

Furthermore, the drive coupling unit 130 enables the movement of the first thickness sensor 110 and the second thickness sensor 120 in the Z-axis direction, so that the first thickness sensor 110 and the second thickness The distance between the sensors 120 can be kept constant.

On the other hand, the first thickness sensor 110 and the second thickness sensor 120, relative movement and relative rotation in the X-axis, Y-axis, and Z-axis with respect to the sensor support 210, one of manual and automatic It can be done by way.

The sensor support 210 is a configuration in which the first thickness sensor 110 and the second thickness sensor 120 are fixedly installed, and various configurations are possible.

For example, the sensor support part 210 has a through opening 211 formed so that the sheet 10 passes, and a first thickness sensor ( 110) and a second thickness sensor 120 may be installed.

In this case, the sensor support 210 is installed on the first surface, which is one of the front and rear surfaces, based on the transport direction of the sheet 10 and the first thickness sensor 110 and the second thickness sensor 120 A reinforcing member 215 may be provided on the other second surface of the bottom surface and the rear surface.

More specifically, the sensor support part 210 is'□' when viewed in the moving direction of the sheet 10 based on the conveying direction of the sheet 10 in which the through opening 211 is formed so that the sheet 10 passes. It may have a shape, through which the first thickness sensor 110 and the second thickness sensor 120 installed by minimizing vibration due to the external environment may enable the thickness measurement of the stable sheet 10.

Here, the through opening 211 may have various structures such as a slot shape in which an inner circumferential surface of an end portion forms a curved surface in addition to a'□' shape as long as the sheet 10 can be transported through it.

In particular, the sensor support part 210, when supporting the first thickness sensor 110 and the second thickness sensor 120, has an opening of a'□' shape instead of a'c' shape, so that it is deformed by its own weight and external By forming a structure that is more insensitive to vibration, the first thickness sensor 110 and the second thickness sensor 120 are affected by external vibration or deformation due to their own weight, so that precise thickness measurement is possible.

Meanwhile, as the through opening 211 is shaped, the sensor support part 210 may still have a possibility of fine deformation or fine vibration.

Accordingly, the sensor support part 210 is a structure for reinforcing a structure that is more insensitive to external vibration and deformation due to its own weight in at least one of the portion and the vicinity where the through opening 211 is formed, at least one reinforcing member 215 May be installed additionally.

The reinforcing member 215 is a configuration for reinforcing a structure that is more insensitive to external vibration and deformation due to its own weight in at least one of the portion and the vicinity in which the through opening 211 is formed, and various configurations are possible.

For example, when the first thickness sensor 110 and the second thickness sensor 120 are installed opposite the sheet 10 on the first surface, which is one of the front and rear surfaces, based on the transport direction of the sheet 10 , The reinforcing member 215 may be composed of a rib provided on the remaining second surface, as shown in FIGS. 6A, 6B and 7.

The reinforcing member 215 is a configuration that is installed on a surface opposite to a surface on which the first thickness sensor 110 and the second thickness sensor 120 are installed among the sensor support parts 210, and various configurations are possible.

For example, the reinforcing member 215 is installed on the surface of the sensor support unit 210 by welding or the like to suppress vibration or deformation of the sensor support unit 210 due to its own weight or external vibration, through which the first thickness sensor Precise measurement is possible by preventing the 110 and the second thickness sensor 120 from vibrating during measurement.

Meanwhile, the reinforcing member 215 is composed of a pair of reinforcing members respectively coupled to the upper and lower sides of the through opening 211, as shown in FIG. 6A, or as shown in FIG. 6B, the through opening ( Various embodiments are possible, such as having a'ㅁ' shape surrounding 211).

The reinforcing member 215 may be installed in the longitudinal direction of the sensor supporting part 210 along the through opening 211 of the sensor supporting part 210.

Meanwhile, the sensor support part 210 has a through opening 211 formed therein so that it can be stably installed in the base part 220 to be described later, and the first thickness sensor 110 and the second thickness sensor 120 are installed. It may further include a horizontal member 216 forming the bottom portion of the fixing portion 218.

The sensor fixing part 218 is a configuration in which the through opening 211 is formed and the first thickness sensor 110 and the second thickness sensor 120 are installed, and the through opening 211 is formed, and as a plate-shaped rectangular metal member Various configurations are possible, such as being configured.

Here, it is preferable that the material of the sensor fixing part 218 is made of a material having a relatively small deformation due to its own weight or the like.

The horizontal member 216 is welded, bolted, or integrally installed at the lower end of the sensor fixing part 218 of the sensor supporting part 210 to support the sensor fixing part 218 of the sensor supporting part 210 Various configurations are possible.

Meanwhile, in the combination of the horizontal member 216 and the sensor fixing part 218, the horizontal member 216 and the sensor fixing part at both sides, that is, at both ends in the Y-axis direction, based on the through opening 211 for structural reinforcement. A side member 217 fixedly coupled to the 218 may be installed.

The base unit 220 is a configuration in which the sensor support unit 210 is reciprocally coupled within a reciprocating section set in a measurement direction (Y-axis direction) perpendicular to the transfer direction (X-axis direction) of the sheet 10 As, various configurations are possible.

For example, the base unit 220 is a material having a large self-weight as a large weight so that the sensor support unit 210 is stably moved and external vibrations are not transmitted to the sensor support unit 210, for example, a stone tablet. Can be used.

In addition, the base unit 220 may be supported by a seismic structure with respect to the ground, and for example, a vibration isolation table 270 may be installed at the lower end to suppress vibration of the external environment.

The vibration isolation table 270 is a configuration installed at the lower end of the base unit 220 to suppress vibration of the external environment in the base unit 220, and various configurations are possible.

For example, the vibration isolator 270 may be configured in any configuration as long as it absorbs and blocks external vibration, and may be a configuration in which rubber, oil, spring, stone, sand, and the like are applied.

Through this, the vibration isolator 270 can prevent the vibration generated in the external environment from being transmitted to the base unit 220, thereby enabling a stable and precise thickness measurement.

In addition, the base part 220 is provided with a guide rail 250 forming a reciprocating movement section on the upper surface, and at this time, the sensor support part 210 is a guide block 260 that reciprocates along the guide rail 250 Can be supported by

The guide rail 250 is installed on the base unit 220 to form a reciprocating movement section of the sensor support unit 210 and may be configured with one or more rails.

For example, the guide rail 250 is installed in the groove portion 221 formed on the upper surface of the base portion 220, the reciprocating movement section of the sensor support portion 210 to reciprocate through the reciprocating movement drive unit to be described later Can be formed.

At this time, the guide rail 250 may be configured in various ways according to the configuration of the reciprocating driving unit, and a rail applied to an LM guide, a rail for driving a ball screw, or the like may be used.

Meanwhile, the guide block 260 supports the sensor support part 210 and moves reciprocally along the guide rail 250, and may be configured as an LM guide together with the guide rail 250.

For example, the guide block 260 may be composed of one or more blocks that are coupled to the bottom of the horizontal member 216 and reciprocate along the guide rail 250.

On the other hand, the installation positions of the guide block 260 and the guide rail 250 may of course be interchangeable, and the reciprocating movement of the guide block 260 along the guide rail 250 is driven by the reciprocating movement driver.

The reciprocating movement drive unit is configured to reciprocate the sensor support unit 210 within a reciprocating section, and any linear driving device such as a screw jack can be used.

The reciprocating movement driving unit is a configuration for reciprocating the sensor support unit 210 within a reciprocating section, and various configurations are possible.

Meanwhile, the reciprocating movement driving unit, the guide block 260 and the guide rail 250 are configured to reciprocate the sensor support unit 210 within the reciprocating section, and various configurations and configurations according to the implementation form of movement, for example, linear driving, etc. Of course, combinations are possible.

For example, when implemented as a linear drive device, various modules such as an LM guide and a screw jack can be used.

On the other hand, when the guide block 260 reciprocates along the guide rail 250, minute vibrations caused by the movement are transmitted to the sensor support unit 210, so that the first thickness sensor unit 110 and the second thickness sensor unit 120 ) Can affect the thickness measurement.

That is, when the thickness of the sheet to be measured is very small in the thickness measurement by the first thickness sensor unit 110 and the second thickness sensor unit 120, there is a problem that the measurement error may be very large due to minute vibration. .

Accordingly, in supporting the vertical portion 210, the sensor support 210 vibrates between at least one of the guide block 260 and the horizontal member 210, and between the horizontal member 210 and the vertical portion 210. A vibration transmission prevention unit 240 for preventing transmission may be installed.

The vibration transmission preventing unit 240, in supporting the vertical portion 210, between the guide block 260 and the horizontal member 210, and between the horizontal member 210 and the vertical portion 210 at least one of Any configuration for preventing vibration transmission, such as a damper or spring, is installed to prevent vibration from being transmitted to the sensor support unit 210, in particular, the first thickness sensor unit 110 and the second thickness sensor unit 120. It is possible.

Meanwhile, as shown in FIG. 4, the sensor support part 210 includes a buffer support member 260 in which an installation opening 261 is formed to support the sensor fixing part 218, and at this time, the vibration transmission prevention part ( 240 may be composed of a plurality of dampers and springs installed at the installation opening 261 of the buffer support member 260 and the sensor fixing part 218.

Here, the buffer member 260 is a configuration in which an installation opening 261 is formed to support the sensor fixing part 218 and may have a shape similar to the shape of the sensor fixing part 218.

In addition, the buffer member 260 may be configured by replacing the sensor fixing part 218 in the embodiment shown in FIG. 1.

For example, the buffer member 260 may be formed of a rectangular plate having a rectangular installation opening 261. Here, the sensor fixing part 218 may also be formed of a rectangular plate in which a through opening 211 is formed.

On the other hand, the vibration transmission preventing unit 240, as shown in Figure 4, it is preferable that a plurality of installations at the top and bottom of the sensor fixing part 218.

In addition, one or more of the vibration transmission preventing parts 240 may be installed at the side ends of the sensor fixing part 218 to minimize vibrations in the lateral direction of the sensor fixing part 218, that is, in the Y-axis direction.

At this time, the vibration transmission preventing units 240 may be applied any type of configuration disclosed as long as they are configured to absorb vibration, and a damper, a spring, or the like may be used.

For example, when the vibration transmission preventing parts 240 are dampers, a damper using one of a gas and a fluid, for example, an air damper may be used.

As another example, when the vibration transmission preventing unit 240 is a spring, various elastic members such as an air spring, a bellows air spring, a coil spring, and a plate spring may be applied.

Meanwhile, by the combination of the buffer member 260 and the vibration transmission preventing unit 240 as described above, it is possible to prevent the vibration from being transmitted to the first thickness sensor unit 110 and the second thickness sensor unit 120.

Meanwhile, a detailed description of the sensor location according to the present invention with reference to the accompanying drawings is as follows.

The thickness measuring apparatus according to the present invention, as shown in Figure 5, the sensor support part 210 in the reciprocating section set in the measurement direction (Y-axis direction) perpendicular to the transfer direction (X-axis direction) of the sheet 10. ) Reciprocating, it is possible to measure the thickness of the sheet 10.

In this case, the first thickness sensor 110 and the second thickness sensor 120 may be provided with at least one in the measurement direction (Y-axis direction), respectively, for example, when two are provided, shown in FIG. As described above, the sensor support 210 reciprocates in a vertical direction with respect to the sheet 10 moving in a certain direction, so that the thickness of the sheet 10 in each measurement area P can be measured.

More specifically, the reciprocating section set in the measurement direction perpendicular to the sheet 10 may be set in a direction perpendicular to the movement direction of the sheet 10 on the same plane as the movement direction of the sheet 10.

Thereby, the sensor support part 210 can move in the front, upper and left direction based on the transport direction of the moving sheet 10, and the first thickness sensor 110 and the second thickness sensor fixedly installed on the sensor support part 210 As the 120 moves in the width direction of the sheet 10, the thickness of the sheet 10 may be measured by drawing a measurement area P as shown in FIG. 5.

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the claims of the present invention should not be construed as limited to the above embodiments, as well known, the present invention described above. It will be said that both the technical idea of and the technical idea that accompanies the fundamental are included in the scope of the present invention.

10: sheet
110: first thickness sensor 120; 2nd thickness sensor
210: sensor support 220: base

Claims (10)

A first thickness sensor 110 and a second thickness sensor 120 that are installed to be opposed to each other between the sheets 10 conveyed by the plurality of rollers;
A sensor support 210 to which the first thickness sensor 110 and the second thickness sensor 120 are fixedly installed;
A base part 220 to which the sensor support part 210 is reciprocally movably coupled within a reciprocating section set in the measurement “‡ direction” perpendicular to the transfer direction of the sheet 10;
And a reciprocating movement driving unit for reciprocating the sensor support unit 210 within a reciprocating section. The method according to claim 1,
The sheet 10,
Thickness measuring apparatus, characterized in that any one of a positive electrode sheet and a negative electrode sheet constituting the secondary battery. The method according to claim 1,
The sheet 10,
A thickness measuring device, characterized in that it is an electrode sheet before active material coating, after active material coating, before pressing, or after active material coating and pressing. The method according to claim 1,
The sensor support 210,
A through opening 211 is formed so that the sheet 10 passes,
The first thickness sensor 110 and the second thickness sensor 120,
A thickness measuring apparatus, characterized in that fixed to at least one of the front and rear surfaces of the sensor support part 210 based on the transport direction of the sheet 10. The method according to claim 1,
The first thickness sensor 110 and the second thickness sensor 120,
It is fixed to the first surface of any one of the front and rear surfaces of the sensor support 210 based on the transport direction of the sheet 10,
A thickness measuring apparatus, characterized in that a reinforcing member is formed on the other second surface of the front and rear surfaces of the sensor support part 210. The method according to claim 1,
The base part 220,
Thickness measurement device, characterized in that supported by the seismic structure against the ground. The method according to claim 1,
The base part 220 is provided with a guide rail 250 forming the reciprocating movement section,
The sensor support 210 is a thickness measuring apparatus, characterized in that supported by a guide block 260 reciprocating along the guide rail (250). The method according to claim 1,
The first thickness sensor 110 and the second thickness sensor 120,
Thickness measurement device, characterized in that installed in the sensor support 210 to enable adjustment of the relative distance to the measurement surface of the sheet (10). The method according to claim 1,
The first thickness sensor 110 and the second thickness sensor 120,
Thickness measurement device, characterized in that any one of an ultrasonic sensor, a laser sensor and a confocal sensor. The method of claim 9,
The confocal sensor,
Thickness measuring apparatus, characterized in that using a multi-color wavelength.

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