Measuring device

Abstract

The utility model relates to the technical field of lithium battery detection, in particular to a measuring device which comprises a mounting base, an air floating guide rail, a measuring frame and a measuring assembly, the air floating guide rail is arranged on the mounting 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 measuring frame is of an annular structure, and one end of the measuring frame is connected with the air floating sliding block so that the measuring frame can move along with the air floating sliding block. The measuring assembly is arranged on the measuring frame and can move along with the measuring frame. 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 measuring frame 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] This application relates to the field of lithium battery testing technology, and more specifically to a measuring device. Background Technology

[0002] In the lithium battery manufacturing process, the uneven thickness of the positive and negative electrode sheets directly affects the performance of the battery. Therefore, it is necessary to monitor and inspect the thickness and areal density of the electrode sheets. Currently, laser thickness measurement and image scanning for areal density measurement are among the most commonly used non-destructive testing methods for lithium battery electrode inspection. The principle involves two laser displacement sensors pointing at the same point, measuring the distance from the surface of the object to the sensors to calculate the thickness, and using two laser beam devices positioned vertically to measure the areal density.

[0003] However, in actual measurements, due to vibrations during equipment operation, the laser beam or X-ray device used for repeated measurements of the object being measured is easily affected. Currently, the main transmission methods in measuring equipment are screw-rail or belt-rail structures, which can only minimize the impact of vibration on the sensor by adjusting the level and adding vibration damping pads. However, due to the contradiction between the ever-increasing demand for precision detection and the need for faster measurement speeds, the impact of mechanical friction at different speeds and low-frequency vibrations of mechanical connecting parts on sensor accuracy is becoming increasingly apparent, leading to a bottleneck in further improving the repeatability accuracy of the equipment. Utility Model Content

[0004] This application provides a measuring device that can reduce the impact of high-speed motion, mechanical friction and mechanical vibration on sensors, in order to meet the development needs of high-precision and high-speed measurement.

[0005] This application provides a measuring device, including a mounting base, an air-bearing guide rail, a measuring frame, and a measuring component. The air-bearing guide rail is disposed on the mounting base and has an air-bearing slider that can move on the air-bearing guide rail. The measuring frame has a ring structure, and one end of the measuring frame is connected to the air-bearing slider so that the measuring frame can follow the movement of the air-bearing slider. The measuring component is disposed on the measuring frame and can follow the movement of the measuring frame.

[0006] In some alternative embodiments, at least two measuring components are provided, and the at least two measuring components are spaced apart on the measuring frame along the extension direction of the air-bearing guide rail.

[0007] In some optional embodiments, the travel distance of the measuring frame is L, and the distance between two adjacent measuring components is D, satisfying D≤L.

[0008] In some alternative embodiments, the measuring frame is a flat O-shaped structure, and a straight groove runs through the middle of the measuring frame.

[0009] In some optional embodiments, 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.

[0010] In some alternative embodiments, the measurement component includes at least one of a laser measurement module, an ultrasonic sensor, or an image sensor.

[0011] In some alternative embodiments, the measuring device further includes a drive mechanism for driving the air-bearing slider to move on the air-bearing guide rail.

[0012] In some alternative embodiments, the air-bearing slider is made of marble.

[0013] In some optional embodiments, the air-bearing guide rail has a T-shaped structure, the air-bearing slider forms a T-shaped mounting cavity in the middle, and the air-bearing guide rail is disposed in the T-shaped mounting cavity; the air-bearing slider is provided with an airflow hole communicating with the T-shaped mounting cavity to form an air film between the air-bearing slider and the air-bearing guide rail.

[0014] In some optional embodiments, the thickness of the gas film is 10 μm.

[0015] The measuring device according to this embodiment includes a mounting base, an air-bearing guide rail, a measuring frame, and measuring components. An air-bearing slider is mounted on the air-bearing guide rail and can move along it. The measuring frame and measuring components can follow the movement of the air-bearing slider. Due to the arrangement of the air-bearing slider and the air-bearing guide rail, they are separated by the principle of air static pressure, thereby reducing friction during movement and achieving high-speed, frictionless operation of the air-bearing slider. This ensures the stability of the measuring frame and measuring components on the air-bearing slider during movement, thus meeting the development needs of high-precision and high-speed measurements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the measuring device in one embodiment;

[0017] Figure 2 This is a schematic diagram of the measuring frame in one embodiment;

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

[0019] Figure 4 This is a three-dimensional view of the measuring device in another embodiment;

[0020] Figure 5 This is a schematic diagram of the assembly of the air-bearing guide rail and the air-bearing slider in one embodiment.

[0021] Wherein: 10, mounting base; 20, air-bearing guide rail; 30, air-bearing slider; 301, mounting cavity; 302, airflow hole; 303, first air-bearing block; 304, second air-bearing block; 305, third air-bearing block; 306, fourth air-bearing block; 307, fifth air-bearing block; 40, measuring frame; 401, annular side; 402, outer edge surface; 403, inner edge surface; 404, slot; 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-bearing guide rail; Y, horizontal direction; Z, vertical direction. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0023] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0024] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0025] This application provides a measuring device for measuring the thickness, areal density, etc. of sheet-like test objects, including but not limited to diaphragms, electrodes, etc.

[0026] Please see Figures 1 to 5The measuring device includes a mounting base 10, an air-bearing guide rail 20, a measuring frame 40, and a measuring component 50. The air-bearing guide rail 20 is mounted on the mounting base 10 and has an air-bearing slider 30 that can move on the air-bearing guide rail 20. The measuring frame 40 has a ring structure, and one end of the measuring frame 40 is connected to the air-bearing slider 30 so that the measuring frame 40 can follow the movement of the air-bearing slider 30. The measuring component 50 is mounted on the measuring frame 40 and can follow the movement of the measuring frame 40.

[0027] In this application, the air-bearing guide rail 20 provides the motion trajectory, and the measuring frame 40 provides the mounting base for the measuring component 50. The measuring component 50 is used to detect relevant parameters of the object under test and output the detection results in real time so that the user can understand the status of the object under test. By cooperating with the air-bearing guide rail 20 and the air-bearing slider 30 to replace traditional lead screws, belts, etc., friction during the movement can be reduced, which not only effectively reduces the wear of the device and extends its service life, but also ensures the smooth movement of the measuring device. Furthermore, the air-bearing slider 30 can quickly and accurately achieve position adjustment, thereby adapting to the development needs of high-precision and high-speed measurement.

[0028] It should be further explained that for a ring structure, it has a central axis that passes through the geometric center of the ring structure and is perpendicular to the plane in which the ring is located. The two ends of the central axis are the two ends of the ring structure. In other words, the connection between one end of the ring structure and the air-bearing slider 30 mentioned above means that the part of the ring structure located at one end of the central axis is connected to the air-bearing slider 30.

[0029] It should be further explained that the connection mentioned in this application includes a direct connection, that is, the measuring frame 40 and the air float slider 30 are in direct contact, and also includes an indirect connection, that is, a connecting medium, such as a bracket, is provided between the measuring frame 40 and the air float slider 30, and the measuring frame 40 is connected to the air float slider 30 through the connecting medium.

[0030] Furthermore, in some embodiments, the two ends of the central axis of the annular structure have two oppositely arranged annular side surfaces 401. An outer edge surface 402 and an inner edge surface 403 are respectively provided on the inner and outer sides of the annular side surfaces 404. The outer edge surface 402 is the outermost surface, and its radius is the distance from the center (axis) of the annular structure to the outermost edge. The inner edge surface 403 is the innermost surface, and its radius is smaller than that of the outer edge surface 402. The annular side surfaces 401 are used to connect the inner edge surface 403 and the outer edge surface 402. Using the two annular side surfaces 401 of the annular structure as mounting surfaces for assembly with the air-bearing slider 30, i.e., connecting one of the annular side surfaces 401 of the annular structure to the air-bearing slider 30, can reduce the space occupied by the measuring device in the direction of the central axis of the annular structure, allowing full utilization of the space at one end of the annular structure's axis when designing the layout of the measuring device.

[0031] In some embodiments, at least two measuring components 50 are provided, and the at least two measuring components 50 are spaced apart on the measuring frame 40 along the extension direction X of the air-bearing guide rail of the air-bearing slider 30. By setting multiple measuring components 50 to measure simultaneously, the detection efficiency can be improved without increasing the impulse of the measuring frame 40 during acceleration and deceleration. The detection data between multiple measuring components 50 can also be mutually calibrated and verified, thereby improving the accuracy of the detection results.

[0032] In some embodiments, the travel distance of the measuring frame 40 is L, and the distance between two adjacent measuring components 50 is D, satisfying D≤L. It is understood that during measurement, the measuring frame 40 undergoes a stop-move-stop motion process. During this process, there are two acceleration / deceleration motion zones and a uniform motion zone located between the two acceleration / deceleration motion zones. Since the frequency or number of measurements taken by the measuring components 50 is constant, the data measured in the acceleration / deceleration motion zone will affect the accuracy of the overall data. Setting D to less than or equal to L can reduce the amount of measurement data included in the acceleration / deceleration motion zone, thereby reducing the impact on the overall measurement result and improving the accuracy of the detection device.

[0033] The measuring component 50 is detachably connected to the measuring frame 40, and the position of the measuring component 50 can be adjusted according to measurement requirements. The measuring component 50 and the measuring frame 40 can be detachably connected by means of threaded connection, snap-fit, or other methods.

[0034] The air-bearing guide rail 20 is mounted on the mounting base 10. The air-bearing guide rail 20 can be fixedly connected to the mounting base 10 by means of threaded connection, snap-fit, welding, etc. For example, both the mounting base 10 and the air-bearing guide rail 20 are provided with threaded holes, and bolts or screws are passed through the threaded holes to achieve a fixed connection between the air-bearing guide rail 20 and the mounting base 10.

[0035] In some embodiments, the measuring frame 40 has a flat O-shaped structure, with a straight slot 404 penetrating through its center. The measuring frame 40 can be a plate-like structure with the slot 404 penetrating through its center. The slot 404 is used to place the object to be measured or to allow the object to pass through. The penetrating direction of the slot 404 is consistent with the placement direction of the object to be measured. The slot 404 is a straight slot, consistent with the plate-like structure of the object to be measured, to facilitate the placement of the object. The slot 404 also facilitates the installation of the measuring component 50. Of course, in other embodiments, the slot 404 can also be an arc-shaped slot 404, a polygonal slot 404, or other irregularly shaped slots 404.

[0036] In some embodiments, the mounting base 10, the air-bearing guide rail 20, and the air-bearing slider 30 are disposed on a horizontal plane. The air-bearing guide rail 20 extends along the extension direction X of the air-bearing guide rail. Two mounting bases 10 are provided and are spaced apart below the air-bearing guide rail 20 along the extension direction X of the air-bearing guide rail. The two annular side surfaces 401 of the measuring frame 40 are parallel to each other and are both parallel to the horizontal plane. One of the annular side surfaces 401 is connected to the air-bearing slider 30 in parallel. The through direction of the slot 404 is the vertical direction Z, which facilitates the production and assembly of the measuring component 50 and also helps to save space of the measuring component 50 in the vertical direction Z, so as to facilitate the measurement of the vertically placed object to be measured.

[0037] In some embodiments, the measuring component 50 includes a first measuring unit 501 and a second measuring unit 502, which are disposed opposite to each other on both sides of the slot 404.

[0038] In some embodiments, the measurement component 50 includes at least one of a laser measurement module, an ultrasonic sensor, or an image sensor.

[0039] Please continue reading. Figure 3 The measuring components 50 are provided in two. The simultaneous measurement by the two measuring components 50 can shorten the measurement stroke and reduce the movement range of the measuring frame 40. This allows the measuring frame 40 to improve measurement efficiency without high-speed movement, and avoids the impulse damage when the measuring frame 40 moves at high speed and changes direction. This ensures the structural stability of the measuring frame 40 and ultimately guarantees the measurement accuracy.

[0040] Please continue reading. Figure 4 In some specific embodiments, both measuring components 50 are laser measuring modules. The first measuring unit 501 is a laser emitting module, and the second measuring unit 502 is a laser receiving module. That is, the measuring component 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 spaced apart on the same side of the straight groove 404, and can be located at the groove wall of the straight groove 404. The first laser receiving module 505 and the second laser receiving module 506 are spaced apart on the other side of the straight groove 404. For example, the first laser receiving module 505 and the first laser emitting module 503 are spaced apart along the horizontal Y-axis, and the second laser receiving module 506 and the second laser emitting module 504 are positioned opposite each other along the horizontal Y-axis.

[0041] In some embodiments, the measuring device further includes a drive mechanism for driving the air-bearing slider 30 to move on the air-bearing guide rail 20. The drive mechanism is a linear motor or a cylinder, which can also drive the measuring frame 40 to perform linear reciprocating movement. Alternatively, the drive mechanism includes a motor, pulleys, and a transmission belt connected to the air-bearing slider 30, which can also drive the measuring frame 40 to perform linear reciprocating movement. Alternatively, the drive mechanism includes a motor, sprockets, and a chain connected to the air-bearing slider 30, which can also drive the measuring frame 40 to perform linear reciprocating movement.

[0042] In some embodiments, the air-bearing slider 30 is made of marble. The marble covers the air-bearing guide rail 20, which makes the measuring device have high rigidity and overturning moment while being compact and space-efficient, and gives the air-bearing slider 30 high load-bearing capacity and stability during movement.

[0043] In some embodiments, the air-bearing guide rail 20 has a T-shaped structure, and a T-shaped mounting cavity 301 is formed in the middle of the air-bearing slider 30. The air-bearing guide rail 20 is disposed within the T-shaped mounting cavity 301. By covering the T-shaped air-bearing guide rail 20 with the air-bearing slider 30 having the T-shaped mounting cavity 301, the extension direction X of the air-bearing guide rail 20 and the degrees of freedom in each direction of the air-bearing guide rail 30 can be constrained. At the same time, a geometrically closed air film is formed between the air-bearing slider 30 and the air-bearing guide rail 20. The presence of the air film separates the air-bearing slider 30 and the air-bearing guide rail 20. When the two move relative to each other without contact, the influence of mechanical vibration and friction on the measurement results is greatly reduced, improving the stability and accuracy of the measuring device during measurement.

[0044] In some embodiments, the air-bearing slider 30 is provided with airflow holes 302 communicating with the T-shaped mounting cavity 301 to form an air film between the air-bearing slider 30 and the air-bearing guide rail 20. Multiple airflow holes 302 are provided, spaced apart along the extension direction X of the air-bearing guide rail of the air-bearing slider 30, and arranged in all planes where the air-bearing slider 30 and the air-bearing guide rail 20 contact, so that the air film exists at any position between the air-bearing slider 30 and the air-bearing guide rail 20, thereby ensuring that there is no friction at any contact position.

[0045] Please see Figure 5In some embodiments, the air-bearing block 30 includes a first air-bearing block 303, a second air-bearing block 304 and a third air-bearing block 305 symmetrically arranged at both ends of the first air-bearing block 303, a fourth air-bearing block 306 connected to the second air-bearing block 304, and a fifth air-bearing block 307 connected to the third air-bearing block 305. The first air-bearing block 303, the second air-bearing block 304, the third air-bearing block 305, the fourth air-bearing block 306, and the fifth air-bearing block 307 enclose to form the aforementioned T-shaped mounting cavity 301. The first air-bearing block 303, the second air-bearing block 304, the third air-bearing block 305, the fourth air-bearing block 306, and the fifth air-bearing block 307 are all provided with a plurality of air-flow holes 302 at intervals, and the plurality of air-flow holes 302 form an air-flow row. The air-flow row is arranged at intervals along the extension direction X of the air-bearing guide rail. The spacing of the air-flow holes 302 on the same air-bearing block is the same, so that the air film is uniform. Preferably, the first air flotation block 303, the fourth air flotation block 306, and the fifth air flotation block 307 are all arranged along the horizontal transverse direction Y (including approximately horizontal), and the airflow holes 302 on them are arranged at intervals along the horizontal transverse direction Y to form airflow channels. The second air flotation block 304 and the third air flotation block 305 are placed in the vertical direction Z (including approximately vertical), and the airflow holes 302 on them are arranged at intervals along the vertical direction Z to form airflow channels. This modular and symmetrical design ensures that the air flotation slider 30 has a more compact structure while minimizing the displacement changes of the air film on both sides and the upper and lower working surfaces during measurement. Simultaneously, the air film separates the air flotation guide rail 20 and the air flotation slider 30.

[0046] In some embodiments, the cross-section of the airflow hole 302 can be circular, rectangular, triangular or polygonal, and the central axis of the airflow hole 302 should be a straight line to reduce airflow resistance.

[0047] In some embodiments, the thickness of the air film is 10 μm. When the air film is sufficiently rigid, the air film gap will not change drastically when the air buoyancy guide rail 20 and the air buoyancy slider 30 vibrate, thereby isolating the process of vibration being transmitted from the air buoyancy guide rail 20 to the air buoyancy slider 30.

[0048] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A measuring device, characterized in that The utility model relates to a kind of measurement device, including: Mounting seat; Air float guide rail, air float guide rail is arranged on the mounting seat, air float guide rail has air float slider on it, air float slider can move on air float guide rail; Measuring frame, the measuring frame is annular structure, the two ends of the central axis of the annular structure have two oppositely arranged annular sides, one outer edge surface and one inner edge surface are respectively arranged in the outside and inside of the annular side, the outer edge surface is the outermost surface, one of the annular side of the measuring frame is connected with the air float slider, so that the measuring frame can move along with air float slider;And Measuring assembly, measuring assembly is arranged on the measuring frame, and can move along with the measuring frame.

2. The measuring device of claim 1, wherein, The measuring assembly is provided with at least two, and at least two measuring assemblies are spaced apart on the measuring frame along the extension direction of the air float guide rail.

3. The measuring device of claim 2, wherein, The movement stroke of the measuring frame is L, the distance between adjacent two measuring assemblies is D, and D≤L is satisfied.

4. The measuring device of claim 1, wherein, The measuring frame is flat O type structure, and a linear slot is arranged in the middle part of the measuring frame.

5. The measuring device of claim 4, wherein, The measuring assembly includes first measuring unit and second measuring unit, and the first measuring unit and the second measuring unit are oppositely arranged on the two sides of the slot.

6. The measuring device of claim 5, wherein, The measuring assembly includes at least one of laser measurement module, ultrasonic sensor or image sensor.

7. The measuring device of claim 1, wherein, The measurement device further includes a driving mechanism for driving the air float slider to move on the air float guide rail.

8. The measuring device of claim 1, wherein, The air float slider is made of marble.

9. The measuring device of claim 1, wherein, The air float guide rail is T type structure, the middle part of the air float slider forms T type installation cavity, and the air float guide rail is arranged in the T type installation cavity;Air flow hole is arranged on the air float slider and communicated with the T type installation cavity, to form air film between the air float slider and the air float guide rail.

10. The measuring device of claim 9, wherein, The thickness of the air film is 10um.

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