Measuring device

Abstract

The utility model relates to the technical field of lithium battery detection, in particular to a measuring device which comprises a base, an air floating guide rail, a movable support and a measuring assembly, the air floating guide rail is arranged on the base, an air floating sliding block is arranged on the air floating guide rail, and the air floating sliding block can move on the air floating guide rail; the movable support is of an annular structure, and the outer edge face of the movable support is connected with the air floating sliding block so that the movable support can move along with the air floating sliding block. The measuring assembly is arranged on the movable support and can move along with the movable support. Due to the arrangement of the air floating sliding block and the air floating guide rail, the air floating sliding block and the air floating guide rail are separated by utilizing an air static pressure principle, so that friction in a movement process is reduced, high-speed and friction-free operation of the air floating sliding block is realized, and the stability of the moving bracket and the measuring assembly on the air floating sliding block during movement is ensured; therefore, the development requirements of high-precision and high-speed measurement can be met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium battery detection, and more particularly to a measuring device. BACKGROUND

[0002] In the production and manufacturing process of lithium batteries, the thickness unevenness of positive and negative electrode sheets inside the lithium batteries directly affects the performance of the lithium batteries, and the thickness and surface density of the electrode sheets and other related performance information need to be detected and monitored. In the current lithium battery electrode sheet detection, laser shooting thickness measurement and camera scanning surface density measurement are one of the most commonly used non-destructive testing methods. The principle is that two laser displacement sensors are used for point-to-point shooting, and the distance from the measured object to the sensor is measured to calculate the thickness of the measured object, and two ray devices are used for point-to-point shooting to measure the surface density.

[0003] However, in actual measurement, the laser shooting device or the ray device for up-down measurement is easily affected when repeatedly measuring the measured object due to vibration during equipment operation. The main transmission mode of the current measurement equipment is a lead screw guide rail or a belt guide rail structure, which can only adjust the level and increase the damping pad to minimize the influence of vibration on the sensor. However, due to the contradiction between the increasing precision detection requirements and the measurement speed improvement, the low-frequency vibration of the mechanical friction and the mechanical connecting parts leads to the increasingly obvious influence on the sensor precision loss, which causes the bottleneck in further improving the repeatability precision of the equipment at the present stage. CONTENT OF THE INVENTION

[0004] The application provides a measuring device which can reduce the influence of high-speed motion, mechanical friction and mechanical vibration on the sensor to adapt to the development needs of high-precision and high-speed measurement.

[0005] The application provides a measuring device, which comprises a base, an air floating guide rail, a moving support and a measuring assembly. The air floating guide rail is arranged on the base, and the air floating guide rail has an air floating sliding block. The air floating sliding block can move on the air floating guide rail. The moving support is in a ring structure, and the outer edge surface of the moving support is connected with the air floating sliding block, so that the moving support can move with the air floating sliding block. The measuring assembly is arranged on the moving support and can move with the moving support.

[0006] In some optional embodiments, the measuring assembly comprises at least one of a laser measuring module, an ultrasonic sensor or an image sensor.

[0007] In some optional embodiments, at least two measuring assemblies are arranged on the moving support and are spaced apart along the extension direction of the air floating guide rail.

[0008] In some optional embodiments, the moving support has a movement stroke L, and the distance between two adjacent measurement assemblies is D, and D≤L is satisfied.

[0009] In some optional embodiments, the moving support is in a flat O-shaped structure, and a linear slot is arranged through the middle part of the moving support.

[0010] In some optional embodiments, the measurement assembly comprises a first measurement unit and a second measurement unit, and the first measurement unit and the second measurement unit are oppositely arranged on two sides of the slot.

[0011] In some optional embodiments, the measurement device further comprises a driving mechanism connected with the air-floating slide block, and used for driving the air-floating slide block to move along the air-floating guide rail.

[0012] In some optional embodiments, the air-floating slide block is made of marble.

[0013] In some optional embodiments, the air-floating guide rail is in a T-shaped structure, the middle part of the air-floating slide block forms a T-shaped mounting cavity, and the air-floating guide rail is arranged in the T-shaped mounting cavity; and the air-floating slide block is provided with an airflow hole in communication with the T-shaped mounting cavity, so as to form an air film between the air-floating slide block and the air-floating guide rail.

[0014] In some optional embodiments, the thickness of the air film is 10 um.

[0015] According to the measurement device in the embodiment, the measurement device comprises a base, an air-floating guide rail, a moving support and a measurement assembly, the air-floating guide rail is provided with an air-floating slide block, the air-floating slide block can move along the air-floating guide rail, and the moving support and the measurement assembly can move along with the air-floating slide block. Due to the arrangement of the air-floating guide rail and the air-floating slide block, the air-floating guide rail and the air-floating slide block can be separated from each other, so as to reduce the friction in the movement process, to realize high-speed and frictionless operation of the air-floating slide block, and to ensure the stability of the moving support and the measurement assembly on the air-floating slide block of the base during movement, so as to adapt to the development needs of high-precision and high-speed measurement. Since the moving support is in a closed ring-shaped structure, the difference between positive and negative measurement deformations can be eliminated, the position is relatively constant, and the measurement accuracy can be improved. Since the outer edge surface of the ring-shaped structure is connected with the air-floating slide block, the side space of the ring-shaped structure can be fully utilized, and the layout optimization of the measurement device can be facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic view of a measurement device in an embodiment;

[0017] Figure 2 FIG. 3 is a structural schematic view of a moving support in an embodiment;

[0018] Figure 3is a structural perspective view of the measuring device in another embodiment;

[0019] Figure 4 is a structural plan view of the measuring device in another embodiment;

[0020] Figure 5 is a structural left view of the measuring device in one embodiment.

[0021] Wherein: 10, base; 20, air floating guide rail; 30, air floating sliding block; 301, mounting cavity; 302, air flow hole; 303, first air floating block; 304, second air floating block; 305, third air floating block; 306, fourth air floating block; 307, fifth air floating block; 40, moving support; 401, annular side surface; 402, outer edge surface; 403, inner edge surface; 404, notch; 50, measuring assembly; 501, first measuring unit; 502, second measuring unit; 503, first laser emitting module; 504, second laser emitting module; 505, first laser receiving module; 506, second laser receiving module; X, extension direction of the air floating guide rail; Y, horizontal transverse direction; Z, vertical direction. DETAILED DESCRIPTION

[0022] The application will be described in further detail below with specific embodiments and with reference to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following embodiments, many details are described in order to provide a better understanding of the application. However, it will be apparent to those skilled in the art that some features in different cases can be omitted, or replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary for those skilled in the art to understand the related operations in detail according to the description in the specification and the general technical knowledge in the art.

[0023] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only intended to clearly describe one embodiment, and do not mean that the composition and / or order is necessary.

[0024] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connections (couplings) unless otherwise specified.

[0025] The application provides a measuring device for measuring the thickness, areal density and the like of a sheet-shaped object to be measured, including but not limited to a diaphragm, a pole piece and the like.

[0026] Referring to Figures 1 to 5 The measuring device includes a base 10, an air floating guide rail 20, a moving bracket 40 and a measuring assembly 50. The air floating guide rail 20 is arranged on the base 10, and the air floating guide rail 20 has an air floating sliding block 30 thereon, which is capable of moving on the air floating guide rail 20. The moving bracket 40 is of a ring structure, and has a mounting surface, which is an outer edge surface 402 of the ring structure, for connecting with the air floating sliding block 30 so that the moving bracket 40 can move along with the air floating sliding block 30. The measuring assembly 50 is arranged on the moving bracket 40 and is capable of moving along with the moving bracket 40.

[0027] In the application, the air floating guide rail 20 provides a moving track, the moving bracket 40 provides a mounting base for the measuring assembly 50, and the measuring assembly 50 is used for detecting relevant parameters of the object to be measured and outputting the detection results in real time so that the user can know the condition of the object to be measured. The cooperation of the air floating guide rail 20 and the air floating sliding block 30 can replace the traditional screw guide rail, belt and the like, reduce the friction in the moving process, effectively reduce the abrasion of the device, prolong the service life of the device, ensure the smooth movement of the measuring device, and quickly and accurately realize the position adjustment through the air floating sliding block 30, thereby meeting the development needs of high-precision and high-speed measurement.

[0028] The connection mentioned in the application includes direct connection, i.e. the direct contact between the moving bracket 40 and the air floating sliding block 30, and indirect connection, i.e. a connecting medium, such as a connecting piece (connecting rod or connecting seat), is arranged between the moving bracket 40 and the air floating sliding block 30, and the moving bracket 40 is connected with the air floating sliding block 30 through the connecting medium.

[0029] It needs to be further explained that for a ring structure, it has a central axis which passes through the geometric center of the ring structure and is perpendicular to the plane where the ring structure is located. Two ring side surfaces 401 are arranged at the two ends of the central axis of the ring structure. An outer edge surface 402 and an inner edge surface 403 are arranged inside and outside the ring side surface 404 respectively. The outer edge surface 402 is the outermost surface, and the radius of the outer edge surface 402 is the distance from the center of the ring structure to the outermost edge. The inner edge surface 403 is the innermost surface, and the radius of the inner edge surface 403 is smaller than that of the outer edge surface 402. The ring side surface 401 is used for connecting the inner edge surface 403 and the outer edge surface 402. The outer edge surface 402 of the ring structure is connected with the air floating sliding block 30, which can reduce the occupied space of the measuring device in the direction of the central axis of the ring structure, and is suitable for the horizontally arranged object to be measured.

[0030] In some embodiments, the measuring assembly 50 is provided with at least two, and the at least two measuring assemblies 50 are arranged on the moving support 40 at intervals along the extension direction X of the air floating guide rail 20. By arranging multiple measuring assemblies 50 to measure simultaneously, the detection efficiency can be improved without increasing the impulse of the moving support 40 during acceleration and deceleration, and the detection data between the multiple measuring assemblies 50 can be mutually calibrated and verified, thereby improving the accuracy of the detection result.

[0031] In some embodiments, the movement stroke of the moving support 40 is L, and the distance between the adjacent two measuring assemblies 50 is D, which satisfies D≤L. It can be understood that, during measurement, the moving support 40 has a movement process of stop-movement-stop, and in the movement process, there are two acceleration and deceleration movement zones and a uniform speed movement zone located in the middle of the two acceleration and deceleration movement zones. Since the frequency of the measuring assembly 50 during measurement is certain, the data measured in the acceleration and deceleration movement zones will affect the accuracy of the overall data. By setting D to be less than or equal to L, the measurement data counted in the acceleration and deceleration movement zones can be reduced, thereby reducing the influence on the overall measurement result and improving the accuracy of the detection device.

[0032] The measuring assembly 50 is detachably connected with the moving support 40, and the position of the measuring assembly 50 can be adjusted according to the measurement requirement. The measuring assembly 50 and the moving support 40 can be detachably connected in a threaded connection, clamping, or the like.

[0033] The air floating guide rail 20 is arranged on the base 10, and the air floating guide rail 20 can be fixedly connected with the base 10 in a threaded connection, clamping, welding, or the like. For example, threaded holes are arranged on the base 10 and the air floating guide rail 20, and bolts or screws are arranged in the threaded holes to achieve the fixed connection of the air floating guide rail 20 with the base 10.

[0034] In some embodiments, the moving support 40 is a flat O-shaped structure, and a linear slot 404 is arranged in the middle of the moving support 40. The moving support 40 can be a plate-shaped structure, and the slot 404 is arranged in the middle of the moving support 40. The slot 404 is arranged for placing the measured object or making the measured object pass through, and the penetration direction of the slot 404 is consistent with the placement direction of the measured object. The slot 404 is a linear slot 404, which is consistent with the structure of the sheet-shaped measured object, so as to facilitate the placement of the measured object. The arrangement of the slot 404 also facilitates the installation of the measuring assembly 50. Of course, in other embodiments, the slot 404 can be an arc-shaped slot 404, a polygonal slot 404, or other special-shaped slots 404. Since the measured object is a sheet-shaped structure, the slot 404 is preferably a linear slot 404, which facilitates the placement of the measured object. The arrangement of the slot 404 also facilitates the installation of the measuring assembly 50.

[0035] In some embodiments, the base 10, the air floating guide rail 20 and the air floating sliding block 30 are arranged on a horizontal plane, the air floating guide rail 20 extends along the extension direction X of the air floating guide rail, the base 10 is provided with two bases arranged below the air floating guide rail 20 along the extension direction X of the air floating guide rail, the two annular side surfaces 401 of the moving bracket 40 are parallel to each other and perpendicular to the horizontal plane, that is, the moving bracket 40 is in a vertical placement state, the outer edge surface 402 of the moving bracket 40 is connected with the air floating sliding block 30, the penetration direction of the slot 404 is the horizontal transverse direction Y, and the slot 404 penetrates from one annular side surface 401 to the other annular side surface 401, which facilitates the production and assembly of the measurement assembly 50 and is also beneficial to save the space of the measurement assembly 50 in the horizontal transverse direction Y, so as to facilitate the measurement of the object to be measured placed in the horizontal transverse direction Y.

[0036] In some embodiments, the measurement assembly 50 includes a first measurement unit 501 and a second measurement unit 502, and the first measurement unit 501 and the second measurement unit 502 are arranged opposite to each other on both sides of the slot 404. For example, the first measurement unit 501 and the second measurement unit 502 can be arranged opposite to each other along the vertical direction Z.

[0037] In some embodiments, the measurement assembly 50 includes at least one of a laser measurement module, an ultrasonic sensor or an image sensor.

[0038] Please continue to refer to Figure 3 The measurement assembly 50 is provided with two measurement assemblies 50, and the two measurement assemblies 50 simultaneously measure, which can shorten the measurement stroke, reduce the movement range of the moving bracket 40, enable the moving bracket 40 to improve the measurement efficiency without high-speed movement, avoid the impulse damage when the moving bracket 40 changes direction at high speed, ensure the structural stability of the moving bracket 40, and ultimately ensure the measurement accuracy.

[0039] Please continue to refer to Figure 3 In some specific embodiments, the two measurement assemblies 50 are both selected to be laser measurement modules, the first measurement unit 501 is a laser emitting module, and the second measurement unit 502 is a laser receiving module, that is, the measurement assembly 50 includes a first laser emitting module 503, a second laser emitting module 504, a first laser receiving module 505 and a second laser receiving module 506, the first laser emitting module 503 and the second laser emitting module 504 are arranged on the same side of the straight slot 404, and can be arranged at the slot wall of the straight slot 404, and the first laser receiving module 505 and the second laser receiving module 506 are arranged on the other side of the straight slot 404. For example, the first laser receiving module 505 and the first laser emitting module 503 are arranged opposite to each other along the vertical direction Z, and the second laser receiving module 506 and the second laser emitting module 504 are arranged opposite to each other along the vertical direction Z.

[0040] In some embodiments, the measuring device further comprises a driving mechanism (not shown in the figure) for driving the air-floating slider 30 to move on the air-floating guide rail 20. The driving mechanism is a linear motor or a pneumatic cylinder, which can also drive the moving bracket 40 to move linearly and reciprocally. Alternatively, the driving mechanism comprises a motor, a pulley and a transmission belt, the transmission belt being connected with the air-floating slider 30 and also capable of driving the moving bracket 40 to move linearly and reciprocally. Alternatively, the driving mechanism comprises a motor, a sprocket and a chain, the chain being connected with the air-floating slider 30 and also capable of driving the moving bracket 40 to move linearly and reciprocally.

[0041] In some embodiments, the air-floating slider 30 is made of marble. The marble is wrapped on the air-floating guide rail 20, so that the measuring device has greater rigidity and overturning moment in the case of compact structure and high space utilization, and the air-floating slider 30 has higher bearing capacity and stability during movement.

[0042] In some embodiments, the air-floating guide rail 20 is of T-shaped structure, and the middle part of the air-floating slider 30 forms a T-shaped mounting cavity 301, and the air-floating guide rail 20 is arranged in the T-shaped mounting cavity 301. By wrapping the air-floating slider 30 with the T-shaped mounting cavity 301 on the T-shaped air-floating guide rail 20, the extension direction X of the air-floating guide rail of the air-floating guide rail 20 and the air-floating slider 30 and the degrees of freedom in each direction can be constrained, and a geometrically closed air film is formed between the air-floating slider 30 and the air-floating guide rail 20. The air film separates the air-floating slider 30 and the air-floating guide rail 20, and when the two move relative to each other without contact, the influence of mechanical vibration and friction on the measurement result is greatly reduced, and the stability and accuracy of the measuring device during measurement are improved.

[0043] In some embodiments, the air-floating slider 30 is provided with airflow holes 302 in communication with the T-shaped mounting cavity 301, so as to form an air film between the air-floating slider 30 and the air-floating guide rail 20. The airflow holes 302 are provided in plurality, and the plurality of airflow holes 302 are arranged in the extension direction X of the air-floating guide rail of the air-floating slider 30 and in all planes where the air-floating slider 30 and the air-floating guide rail 20 contact, so that the air film exists at any position between the air-floating slider 30 and the air-floating guide rail 20, thereby ensuring that there is no friction at any contact position.

[0044] Please refer to Figure 5In some embodiments, the air floating slider 30 comprises a first air floating block 303, a second air floating block 304 and a third air floating block 305 symmetrically arranged at both ends of the first air floating block 303, a fourth air floating block 306 connected with the second air floating block 304, and a fifth air floating block 307 connected with the third air floating block 305. The first air floating block 303, the second air floating block 304, the third air floating block 305, the fourth air floating block 306 and the fifth air floating block 307 enclose the T-shaped mounting cavity 301. A plurality of air flow holes 302 are arranged on the first air floating block 303, the second air floating block 304, the third air floating block 305, the fourth air floating block 306 and the fifth air floating block 307, and the plurality of air flow holes 302 form an air flow row. The air flow row is arranged along the extension direction X of the air floating guide rail. The air flow holes 302 on the same air floating block have the same spacing, so that the air film is uniform. For example, the first air floating block 303, the fourth air floating block 306 and the fifth air floating block 307 are arranged along the horizontal transverse direction Y (including substantially horizontal), and the air flow holes 302 thereon are arranged along the horizontal transverse direction Y to form an air flow row. The second air floating block 304 and the third air floating block 305 are arranged along the vertical direction Z (including substantially vertical), and the air flow holes 302 thereon are arranged along the vertical direction Z to form an air flow row. The air floating slider 30 is designed in a split and symmetric manner, which makes the structure more compact, and ensures that the displacement of the air film on the working surface of the air floating slider 30 is extremely small during measurement. At the same time, the air film separates the air floating guide rail 20 and the air floating slider 30.

[0045] In some embodiments, the cross section of the air flow hole 302 can be circular, rectangular, triangular or polygonal, and the central axis of the air flow hole 302 should be a straight line to reduce air flow resistance.

[0046] In some embodiments, the thickness of the air film is 10 um. When the rigidity of the air film is sufficient, the vibration of the air floating guide rail 20 and the air floating slider 30 will not cause a sharp change in the air film gap, thereby cutting off the vibration from the air floating guide rail 20 to the air floating slider 30.

[0047] The above application uses specific examples to illustrate the present application, which is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A measuring device, characterized in that, include: Base; An air-bearing guide rail is provided on the base, and an air-bearing slider is provided on the air-bearing guide rail, which is capable of moving on the air-bearing guide rail. A movable support, which has a ring structure, has its outer edge connected to the air-bearing slider so that the movable support can follow the movement of the air-bearing slider; as well as A measuring component is mounted on the movable support and is able to move with the movable support.

2. The measuring device according to claim 1, characterized in that, The measurement components include at least one of a laser measurement module, an ultrasonic sensor, or an image sensor.

3. The measuring device according to claim 1, characterized in that, The measuring components are provided in at least two, and the at least two measuring components are spaced apart on the movable support along the extension direction of the air-bearing guide rail.

4. The measuring device according to claim 3, characterized in that, The travel distance of the movable support is L, and the distance between two adjacent measuring components is D, satisfying D≤L.

5. The measuring device according to claim 1, characterized in that, The movable support has a flat O-shaped structure, and a straight groove runs through the middle of the movable support.

6. The measuring device according to claim 5, characterized in that, The measuring component includes a first measuring unit and a second measuring unit, which are disposed opposite to each other on both sides of the slot.

7. The measuring device according to claim 1, characterized in that, The measuring device also includes a drive mechanism for driving the air-bearing slider to move along the air-bearing guide rail.

8. The measuring device according to claim 1, characterized in that, The air-bearing slider is made of marble.

9. The measuring device according to claim 1, characterized in that, The air-bearing guide rail has a T-shaped structure, and a T-shaped mounting cavity is formed in the middle of the air-bearing slider. The air-bearing guide rail is disposed in the T-shaped mounting cavity. The air-bearing slider is provided with an airflow hole that communicates with the T-shaped mounting cavity to form an air film between the air-bearing slider and the air-bearing guide rail.

10. The measuring device according to claim 9, characterized in that, The thickness of the air film is 10 μm.

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