Dimension measuring apparatus and dimension measuring method

Abstract

A dimension measuring apparatus and a dimension measuring method. The dimension measuring apparatus comprises a frame (10), a measurement region being provided on the frame (10); two first dimension measuring devices (20), which are provided on the frame (10), the two first dimension measuring devices (20) being located on two opposite sides of the measurement region; and two second dimension measuring devices (30), which are provided on the frame (10), the two second dimension measuring devices (30) being located on the other two opposite sides of the measurement region. The first dimension measuring devices (20) each comprise a first motion device and a first image acquisition assembly, and the first motion devices can drive the first image acquisition assemblies to move. The second dimension measuring device (30) each comprise a second motion device and a second image acquisition assembly, and the second motion devices can drive the second image acquisition assemblies to move. The dimension measuring apparatus is an apparatus used for measuring geometric tolerances for various surfaces of large-size products, can achieve comprehensive acquisition and measurement for dimensional information and can improve the measurement accuracy to a certain extent.

Description

Dimension detection equipment and dimension detection method

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 2024100741106, filed on January 18, 2024, entitled “Dimension Detection Equipment and Dimension Detection Method,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of lithium battery finished product measurement, and in particular to a size detection device and a size detection method. Background Art

[0004] Form and position tolerances are common in the measurement of finished lithium battery products, necessitating efficient measurement. Due to the large dimensions of individual finished batteries, the measurement process for large-sized battery products in related technologies typically requires manual lifting and the use of a gauge for dimensional inspection.

[0005] However, the above-mentioned inspection tool has the problem of low detection accuracy.

[0006] Summary of the Invention

[0007] Based on this, it is necessary to provide a dimension detection device and a dimension detection method that can perform shape and position tolerance or size detection on large-size products to address the above technical problems.

[0008] In a first aspect, the present application provides a size detection device, the size detection device comprising:

[0009] A rack, wherein a detection area of ​​the rack is provided with batteries to be tested;

[0010] At least two first size detection devices are provided on the frame, and the at least two first size detection devices are located on opposite sides of the battery to be tested;

[0011] At least two second size detection devices are disposed on the frame, and the at least two second size detection devices are located on two opposite sides of the battery to be tested;

[0012] The first size detection device includes a first motion device and a first image acquisition component, and the first motion device can drive the first image acquisition component to move;

[0013] The second size detection device includes a second motion device and a second image acquisition component, and the second motion device can drive the second image acquisition component to move.

[0014] The dimensional inspection equipment described in the embodiments of this application provides a device for inspecting the form and position tolerances on various surfaces of large-scale products. Multiple surface dimension inspection devices are designed for each surface, based on the inspection requirements. This enables comprehensive dimensional information collection and inspection, which can improve inspection accuracy to a certain extent. Furthermore, the dimensional inspection equipment can also perform quantitative measurements of the batteries being tested, obtaining quantified values ​​for the measurement results.

[0015] In one embodiment, the first motion device includes a first linear motion mechanism and a first lifting mechanism. The first linear motion mechanism is configured to drive the first lifting mechanism to move along a first direction, and the first direction is in a horizontal plane. The first image acquisition component is installed on the first lifting mechanism, and the first lifting mechanism is configured to drive the first image acquisition component to rise and fall.

[0016] The first motion device in the size detection equipment described in the embodiment of the present application can drive the first image acquisition component to move in two different directions, and can collect image feature values ​​of a larger area on one end face of the battery to be tested, thereby improving the detection accuracy of subsequent detection based on the image feature values.

[0017] In one embodiment, the second motion device includes a second linear motion mechanism and a second lifting mechanism. The second linear motion mechanism is configured to drive the second lifting mechanism to move along a second direction. The second direction is in a horizontal plane and intersects with the first direction. The second image acquisition component is installed on the second lifting mechanism. The second lifting mechanism is configured to drive the second image acquisition component to rise and fall.

[0018] The second motion device in the size detection equipment described in the embodiment of the present application can drive the second image acquisition component to move in two different directions, and can collect image feature values ​​of a larger area on the other end face of the battery to be tested, thereby improving the detection accuracy of subsequent detection based on the image feature values.

[0019] In one embodiment, the first image acquisition component includes a first contour camera and at least one first area array detection camera, and the first contour camera and the first area array detection camera are both arranged toward the battery to be tested.

[0020] The first area array detection cameras set at different positions in the first image acquisition component described in the embodiment of the present application can form a backlight scene to complete the detection action. The backlight can be used to highlight the hole features of the thin film while blurring the interference on the product surface, thereby achieving the effect of improving measurement accuracy.

[0021] In one embodiment, the second image acquisition component includes a second contour camera and at least one second area array detection camera, and the second contour camera and the second area array detection camera are both arranged toward the battery to be tested.

[0022] The second area array detection cameras set at different positions in the second image acquisition component described in the embodiment of the present application can form a backlight scene to complete the detection action. The backlight can be used to highlight the hole features of the thin film while blurring the interference on the product surface, thereby achieving the effect of improving measurement accuracy.

[0023] In one embodiment, the size detection equipment also includes a third size detection device, which is arranged on the frame. The third size detection device includes a third motion device and a third image acquisition component. The third image acquisition component is located above the battery to be tested, and the third motion device can drive the third image acquisition component to move.

[0024] The third motion device in the size detection equipment described in the embodiment of the present application can drive the third image acquisition component to move in two different directions, and can collect image feature values ​​of a larger area on the top surface of the battery to be tested, thereby improving the detection accuracy of subsequent detection based on the image feature values.

[0025] In one embodiment, the third motion device includes a third linear motion mechanism and a third lifting mechanism. The third linear motion mechanism is configured to drive the third lifting mechanism to move along the first direction or the second direction. The second direction is in the horizontal plane and intersects with the first direction. The third image acquisition component is installed on the third lifting mechanism. The third lifting mechanism is configured to drive the third image acquisition component to rise and fall.

[0026] The third motion device in the size detection equipment described in the embodiment of the present application can drive the third image acquisition component to move in two different directions, and can collect image feature values ​​of a larger area on the top surface of the battery to be tested, thereby improving the detection accuracy of subsequent detection based on the image feature values.

[0027] In one embodiment, the third image acquisition component includes a third area array detection camera and at least two third contour cameras, and the third area array detection camera and the third contour cameras are both arranged toward the battery to be tested.

[0028] The third contour cameras set at different positions in the third image acquisition component described in the embodiment of the present application can form a backlight scene to complete the detection action. The backlight can be used to highlight the contour features while blurring the interference on the product surface, thereby achieving the effect of improving measurement accuracy.

[0029] In one embodiment, the frame includes a fixed frame and a lifting platform, and the first size detection device and the second size detection device are both arranged on the fixed frame;

[0030] The battery to be tested is placed in the testing area on the lifting platform.

[0031] The rack described in the embodiment of the present application has the function of adjusting the test position of the battery to be tested, which does not require manual adjustment of the battery to be tested, can realize an automatic test, and improve the test accuracy.

[0032] In one embodiment, the lifting platform includes a workbench and a fourth lifting mechanism disposed at the bottom of the workbench.

[0033] The rack described in the embodiment of the present application can have the function of adjusting the test position of the battery to be tested through the fourth lifting mechanism, without the need for manual adjustment of the battery to be tested, and can achieve an automatic test and improve the test accuracy.

[0034] In one embodiment, the lifting platform further includes a height sensor disposed on the workbench, and the height sensor is used to detect the height of the battery to be tested located in the detection area.

[0035] The lifting platform described in the embodiment of the present application can detect the height of the battery to be tested by setting a height sensor, thereby ensuring the position stability of the battery to be tested and improving the measurement accuracy.

[0036] In one embodiment, the size detection device further includes a controller disposed on the frame, and the controller is capable of driving the first motion device to move the first image acquisition component, and driving the second motion device to move the second image acquisition component.

[0037] The controller described in the embodiment of the present application can process the images captured by the first image acquisition component and the second image acquisition component, and calculate the eigenvalues, so as to quickly obtain the test results.

[0038] In a second aspect, the present application provides a size detection method, which is applied to the size detection device of the first aspect. The size detection method includes:

[0039] The first motion device is controlled to drive the first image acquisition component to move to the detection area to detect the battery to be tested, and the second motion device is controlled to drive the second image acquisition component to move to the detection area to detect the battery to be tested, and the detection result is obtained.

[0040] In one embodiment, the method further comprises:

[0041] The coordinate systems of the first image acquisition component and the second image acquisition component are calibrated according to the measurement value of the preset calibration block and the image feature value of the calibration block to obtain the calibrated first image acquisition component and the calibrated second image acquisition component; the first motion device is controlled to drive the first image acquisition component to move to the detection area to detect the battery to be tested, and the second motion device is controlled to drive the second image acquisition component to move to the detection area to detect the battery to be tested, and the detection results are obtained, including:

[0042] The first motion device is controlled to drive the calibrated first image acquisition component to move to the detection area to detect the battery to be tested, and the second motion device is controlled to drive the calibrated second image acquisition component to move to the detection area to detect the battery to be tested, and the detection result is obtained.

[0043] In one embodiment, a method for obtaining a measurement value of a calibration block includes:

[0044] Controlling the fourth lifting mechanism to place a preset calibration block in the detection area;

[0045] The calibration block is measured to obtain a measurement value of the calibration block.

[0046] In one embodiment, obtaining the image feature value of the calibration block includes:

[0047] The first motion device is controlled to drive the first image acquisition component to move to the detection area toward the calibration block for image acquisition, and the second motion device is controlled to drive the second image acquisition component to move to the detection area toward the calibration block for image acquisition to obtain the image feature value of the calibration block.

[0048] In one embodiment, controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to detect the battery to be tested, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to detect the battery to be tested, and obtaining the test results includes:

[0049] Driving the fourth lifting mechanism to place the battery to be tested in the testing area;

[0050] Controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to capture an image of the battery, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to capture an image of the battery, thereby obtaining a characteristic image of the battery to be tested;

[0051] The test result is obtained according to the characteristic image of the battery to be tested and the measurement value of the calibration block.

[0052] In one embodiment, the method further comprises:

[0053] Establishing a product benchmark based on the calibrated first image acquisition component and the second image acquisition component to obtain the first image acquisition component and the second image acquisition component after benchmark establishment;

[0054] Controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to capture an image of the battery to be tested, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to capture an image of the battery to be tested, to obtain a characteristic image of the battery to be tested, including:

[0055] The first motion device is controlled to drive the first image acquisition component after the benchmark is established to move to the detection area to acquire an image of the battery to be tested, and the second motion device is controlled to drive the second image acquisition component after the benchmark is established to move to the detection area to acquire an image of the battery to be tested, thereby obtaining a characteristic image of the battery to be tested.

[0056] In one embodiment, the method further comprises:

[0057] The position of the first image acquisition component and the position of the second image acquisition component are debugged.

[0058] In one embodiment, the method further comprises:

[0059] The first image acquisition component and the second image acquisition component are calibrated for accuracy.

[0060] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0062] FIG1 is a schematic diagram of the overall structure of a size detection device in one embodiment;

[0063] FIG2 is a schematic top view of a size detection device according to an embodiment;

[0064] FIG3 is a side view of a size detection device according to an embodiment;

[0065] FIG4 is a schematic diagram of an end face of a size detection device according to an embodiment;

[0066] FIG5 is a schematic structural diagram of a first motion device and a second motion device in one embodiment;

[0067] FIG6 is a schematic structural diagram of a third motion device in one embodiment;

[0068] FIG7 is a schematic diagram of the overall structure of a size detection device in another embodiment;

[0069] FIG8 is a schematic diagram of a size detection process in one embodiment. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0072] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0073] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0074] At present, when testing large-sized battery packs, i.e., battery packs formed by stacking multiple layers of battery modules, the size of a single large-sized battery pack is generally larger than 1m3 and the weight is larger than 1t. Therefore, the existing measurement solution for large-sized battery packs is to manually lift the batteries and then use a gauge to perform size detection. This method has low measurement efficiency and the gauge can only perform qualitative measurement. The embodiments of the present application address this problem by optimizing the existing method for measuring the size of large-sized batteries and providing a size detection device that can improve test efficiency and test accuracy. The following embodiments will illustrate the size detection device.

[0075] In one embodiment, the embodiments of Figures 1 to 4 are a size detection device (Figure 1 is a three-dimensional schematic diagram of the size detection device, Figure 2 is a top schematic diagram of the size detection device, Figure 3 is a side schematic diagram of the size detection device, and Figure 4 is an end schematic diagram of the size detection device, wherein the end schematic diagram refers to a schematic diagram based on the angle of observation of the end face of the battery to be tested, and the end face of the battery to be tested is a plane perpendicular to the side face of the battery to be tested), the size detection device includes: a rack 10, a detection area of ​​the rack 10 is provided with a battery to be tested 50; at least two first size detection devices 20, which are provided on the rack 10 (Figure 1 is used as an example, in which only two first size detection devices 20 are shown), and the at least two first size detection devices 20 are located on opposite sides of the battery to be tested 50; at least two second The size detection device 30 is arranged on the frame 10 (Figure 1 is taken as an example. Due to the display angle problem in Figure 1, only one second size detection device 30 can be seen, but the actual size detection equipment described in Figure 1 includes at least two second size detection devices 3, which can be seen in the top surface schematic diagram described in Figure 2 or the end surface schematic diagram in Figure 4). At least two second size detection devices 30 are located on the other opposite sides of the battery 50 to be tested; wherein, the first size detection device 20 includes a first motion device 201 and a first image acquisition component 202, and the first motion device 201 can drive the first image acquisition component 202 to move; the second size detection device 30 includes a second motion device 301 and a second image acquisition component 302, and the second motion device 301 can drive the second image acquisition component 302 to move. (Note: The number 201 is not shown in Figure 1. The first motion device 201 includes the first linear motion mechanism 2011 and the first lifting mechanism 2012 in Figure 5, that is, the numbers 201 include 2011 and 2012; the number 202 is not shown in Figure 1. The first image acquisition component 202 includes the first contour camera 2021 and the first area array detection camera 2022 in Figure 5, that is, the numbers 202 include 2021 and 2022; the number 301 is not shown in Figure 1. The second motion device 301 includes the second linear motion mechanism 3011 and the second lifting mechanism 3012 in Figure 5, that is, the numbers 301 include 3011 and 3012; the number 302 is not shown in Figure 1. The second image acquisition component 302 includes the second contour camera 3021 and the first area array detection camera 3022 in Figure 5, that is, the numbers 302 include 3021 and 3022).

[0076] The first size detection device 20 can be fixed to the frame 10 by means of screws, snaps, etc., so that it can be flexibly disassembled and installed. The first size detection device 20 is used to detect the features of the end face of the battery 50 to be tested, and different first size detection devices 20 can be used to detect the features of different end faces of the battery 50 to be tested, such as the features of the two end faces of the battery 50 to be tested; the second size detection device 30 can be fixed to the frame 10 by means of screws, snaps, etc., so that it can be flexibly disassembled and installed. The second size detection device 30 is used to detect the features of the side face of the battery 50 to be tested, and different second size detection devices 30 can be used to detect the features of different side faces of the battery 50 to be tested, such as the features of the two side faces of the battery 50 to be tested. In some embodiments, the first motion device 201 can be a servo control device; the second motion device 301 can be a servo control device.

[0077] The first image acquisition device 202 can be fixed to the first motion device 201 by screws, clips, etc., so that it can be flexibly removed and installed. The first motion device 201 is used to drive the first image acquisition device 202 to move in different directions within a plane, for example, horizontally or vertically. The first image acquisition component 202 can include multiple image acquisition cameras of the same type or multiple image acquisition cameras of different types.

[0078] The second image acquisition assembly 302 can be fixed to the second motion device 301 by screws, clips, or the like, allowing for flexible removal and installation. The second motion device 301 is configured to drive the second image acquisition assembly 302 to move in different directions within a plane, for example, horizontally or vertically. The second image acquisition assembly 302 can include multiple image acquisition cameras of the same type or multiple image acquisition cameras of different types.

[0079] In this embodiment of the present application, after the first image acquisition device 202 is mounted on the first motion device 201, the first image acquisition device 202 can be calibrated. After the second image acquisition assembly 302 is mounted on the second motion device 202, the second image acquisition assembly 302 can be calibrated. Accordingly, the first motion device 201 is driven to adjust the calibrated first image acquisition assembly 202 to a working position near the inspection area, and the second motion device 202 is driven to adjust the calibrated second image acquisition assembly 302 to a working position near the inspection area. Afterwards, the measured calibration block can be placed within the inspection area of ​​the rack 10, and the adjusted first and second image acquisition assemblies 202 and 302 are activated to perform camera coordinate system calibration on the images captured by the calibration block. After camera coordinate system calibration is complete, the calibration block can be replaced, and the battery to be tested can be placed within the inspection area of ​​the rack 10. The calibrated first and second image acquisition assemblies 202 and 302 are then activated to perform geometric tolerance or dimensional inspection on the captured images of the battery to be tested.

[0080] The dimensional inspection equipment described in the embodiments of this application provides a device for inspecting the form and position tolerances on various surfaces of large-scale products. Dimension inspection devices are designed for each surface, tailored to the inspection requirements. This enables comprehensive dimensional information collection and inspection, which can improve inspection accuracy to a certain extent. In some embodiments, the dimensional inspection equipment can also perform quantitative measurements of the batteries being tested, obtaining quantified values ​​for the measurement results.

[0081] In one embodiment, as shown in FIG5 , the first motion device 201 includes a first linear motion mechanism 2011 and a first lifting mechanism 2012. The first linear motion mechanism 2011 is configured to drive the first lifting mechanism 2012 to move in a first direction, which is within a horizontal plane. The first image acquisition assembly 202 is mounted on the first lifting mechanism 2012, which is configured to drive the first image acquisition assembly 202 up and down. (Number 201 is not shown in FIG5 ; number 201 includes both 2011 and 212).

[0082] The first linear motion mechanism 2011 can be a horizontal sliding shaft equipped with a sliding block that can move on the horizontal sliding shaft, and the first lifting mechanism 2012 can be mounted on the horizontal sliding shaft to drive the first lifting mechanism 2012 to move horizontally. The first lifting mechanism 2012 can be a vertical sliding shaft equipped with a sliding block that can move on the vertical sliding shaft, and the first image acquisition assembly 202 can be mounted on the vertical sliding shaft to drive the first image acquisition assembly 202 to move vertically.

[0083] In some embodiments, the first image acquisition component 202 may include a first contour camera 2021 and at least one first area array inspection camera 2022 ( FIG. 5 shows only two first area array inspection cameras 2022 , but the number of first area array inspection cameras 2022 is not limited). Both the first contour camera 2021 and the first area array inspection camera 2022 are positioned toward the battery under test. The first contour camera 2021 is used to capture a contour feature image of one end face of the product under test and perform end face profile detection; the first area array inspection camera 2022 is used to capture a hole feature image on one end face of the product under test and perform end panel hole detection.

[0084] In some embodiments, the first image acquisition component 202 may include one first area array detection camera 2022, or may include multiple first area array detection cameras 2022. When the first image acquisition component 202 includes multiple first area array detection cameras 2022, the multiple first area array detection cameras 2022 may have different fields of view or the same field of view. The field of view of the first image acquisition component 202 may be expanded by providing multiple area array detection cameras.

[0085] In some embodiments, before use, the first area array detection camera 2022 and the first contour camera 2021 need to correspond their pixel sizes to their working sizes, and the first area array detection camera 2022 and the first contour camera 2021 can calculate the field of view by measuring the planned workstation working distance and lens parameters, and then calculate the actual distance corresponding to a single pixel based on the corresponding field of view. After the calculation is completed, the theoretical working distance of the first area array detection camera 2022 and the first contour camera 221 at the working distance can be obtained.

[0086] In some embodiments, the first area array detection camera 2022 and the first contour camera 2021 need to be calibrated in the coordinate system based on the measurement values ​​and image feature values ​​of the calibration block before use; specifically, the corresponding coordinate system rigid body transformation equations and rotation matrix equations can be imported based on the measurement values ​​and image feature values ​​of the corresponding calibration block based on the Euclidean transformation principle to obtain the association relationship between the camera coordinate system and the product coordinate system (or world coordinate system), so that based on this association relationship, the coordinate systems of different cameras at different imaging stations can be projected onto the product coordinate system, thereby constructing a visual testing system through calculation to realize the behavioral tolerance testing function.

[0087] In some embodiments, the first image acquisition component 202 (label 202 is not shown in FIG. 5 , and 202 includes 2021 and 2022 ) may include two first area array detection cameras 2022, and the two first area array detection cameras 2022 may be horizontally arranged side by side on the first lifting mechanism 2012, or the two first area array detection cameras 2022 may be vertically arranged side by side on the first lifting mechanism 2012. The first contour camera 2021 may be arranged at a corresponding position on the same plane as the first area array detection cameras 2022, or may be arranged at a corresponding position on a different plane from the first area array detection cameras 2022.

[0088] In some embodiments, the light source of one of the first area array inspection cameras 2022 is equipped with a diffuser, which softens the light path for image acquisition by the first area array inspection camera 2022 and simultaneously turns off the light source of the other first area array inspection camera 2022, creating a backlit working environment. This can be used to mitigate reflections and deformation on the surface of the battery under test caused by casting, greatly improving inspection accuracy. In some embodiments, the first contour camera 2021 can be a 3D line laser camera.

[0089] The first motion device in the dimensional inspection equipment described in the embodiments of this application can drive the first image acquisition assembly to move in two different directions, enabling the acquisition of image feature values ​​over a larger area on one end face of the battery under test, thereby improving the accuracy of subsequent inspections based on these image feature values. In some embodiments, the first area array inspection cameras positioned at different locations can form a backlit scene to complete the inspection. The backlighting can highlight the characteristics of the sheet hole while blurring any interference on the product surface, thereby improving measurement accuracy.

[0090] In one embodiment, as shown in FIG5 , the second motion device 301 includes a second linear motion mechanism 3011 and a second lifting mechanism 3012. The second linear motion mechanism 3011 is configured to drive the second lifting mechanism 3012 to move in a second direction, which is within a horizontal plane and intersects the first direction. The second image acquisition assembly 302 is mounted on the second lifting mechanism 3012, which is configured to drive the second image acquisition assembly 302 up and down. (Number 301 is not shown in FIG5 ; 301 includes both 3011 and 3012.)

[0091] The second linear motion mechanism 2021 can be a horizontal sliding shaft equipped with a sliding block that can move on the horizontal sliding shaft, and the second lifting mechanism 2022 can be mounted on the horizontal sliding shaft to drive the second lifting mechanism 2022 to move horizontally. The second lifting mechanism 2022 can be a vertical sliding shaft equipped with a sliding block that can move on the vertical sliding shaft, and the second image acquisition assembly 302 can be mounted on the vertical sliding shaft to drive the second image acquisition assembly 302 to move vertically.

[0092] In some embodiments, the second image acquisition component 302 may include a second contour camera 3021 and at least one second area array detection camera 3022 (only two second area array detection cameras 3022 are shown in FIG5 , but the number of second area array detection cameras 3022 is not limited. In some embodiments, due to the display angle of the figure, the second contour camera 3021 is not visible in FIG5 , but the second image acquisition component 302 in FIG5 includes the second contour camera 3021, and the second contour camera 3021 is set at a position adjacent to the second area array detection camera 3022, which can be seen from the setting position of the first contour camera 2021). The second contour camera 3021 and the second area array detection camera 3022 are both set toward the battery to be tested. The second contour camera 3021 is used to capture the shape feature image of the other end face of the product to be tested and to perform end face contour detection; the second area array detection camera 3022 is used to capture the hole feature image on the other end face of the product to be tested and to perform end panel hole detection.

[0093] In some embodiments, the second image acquisition component 302 (label 302 is not shown in FIG. 5 , but includes 3021 and 3022 ) may include one second area array detection camera 3022 , or may include multiple second area array detection cameras 3022 . When the second image acquisition component 302 includes multiple second area array detection cameras 3022 , the multiple second area array detection cameras 3022 may have different fields of view or the same field of view. The field of view of the second image acquisition component 302 may be expanded by providing multiple area array detection cameras.

[0094] In some embodiments, before use, the second area array detection camera 3022 and the second contour camera 3021 need to be aligned with their pixel size and working size. Furthermore, the second area array detection camera 3022 and the second contour camera 3021 can calculate the field of view by measuring the planned workstation working distance and lens parameters, and then calculate the actual distance corresponding to a single pixel based on the corresponding field of view. After the calculation is completed, the theoretical working distance of the second area array detection camera 3022 can be obtained. The second contour camera 3021 can be a 3D line laser camera.

[0095] In some embodiments, the second area array detection camera 3022 and the second contour camera 3021 need to be calibrated in the coordinate system based on the measurement values ​​and image feature values ​​of the calibration block before use; specifically, the corresponding coordinate system rigid body transformation equations and rotation matrix equations can be imported based on the measurement values ​​and image feature values ​​of the corresponding calibration block based on the Euclidean transformation principle to obtain the association relationship between the camera coordinate system and the product coordinate system (or world coordinate system), so that based on this association relationship, the coordinate systems of different cameras at different imaging stations can be projected onto the product coordinate system, thereby constructing a visual testing system through calculation to realize the behavioral tolerance testing function.

[0096] In some embodiments, the second image acquisition component 302 may include two second area array detection cameras 3022, and the two second area array detection cameras 3022 may be horizontally arranged side by side on the second lifting mechanism 2022, or the two second area array detection cameras 3022 may be vertically arranged side by side on the second lifting mechanism 2022. The second contour camera 3021 may be arranged at a corresponding position on the same plane as the second area array detection cameras 3022, or at a corresponding position on a different plane from the second area array detection cameras 3022.

[0097] The second motion device in the dimensional inspection equipment described in the embodiments of this application can drive the second image acquisition component to move in two different directions, capturing image feature values ​​from a larger area on the other end face of the battery under test, thereby improving the accuracy of subsequent inspections based on these image feature values. In some embodiments, the second area array inspection cameras positioned at different locations can form a backlit scene to complete the inspection. The backlighting can highlight the characteristics of the sheet hole while blurring any interference on the product surface, thereby improving measurement accuracy.

[0098] In one embodiment, the size detection device shown in FIG1 further includes a third size detection device 40, which is disposed on the frame 10. The third size detection device 40 includes a third motion device 401 and a third image acquisition component 402. The third image acquisition component 402 is located above the battery to be tested, and the third motion device 401 is capable of driving the third image acquisition component 402 to move. (The reference numeral 401 is not shown in FIG1 . The third motion device 401 includes the third linear motion mechanism 4011 and the third lifting mechanism 4012 in FIG6 , i.e., the reference numerals 401 include 4011 and 4012; the reference numeral 402 is not shown in FIG1 . The third image acquisition component 402 includes the third contour camera 4022 and the third area array detection camera 4021 in FIG6 , i.e., the reference numerals 402 include 4021 and 4022).

[0099] In some embodiments, as shown in Figure 6, the third motion device 401 (the label 401 is not shown in Figure 6, and 401 includes 4011 and 4012) includes a third linear motion mechanism 4011 and a third lifting mechanism 4012. The third linear motion mechanism 4011 is configured to drive the third lifting mechanism 4012 to move along the first direction or the second direction. The second direction is in the horizontal plane and intersects with the first direction. The third image acquisition component 402 (the label 402 is not shown in Figure 6) is installed on the third lifting mechanism 4012. The third lifting mechanism 4012 is configured to drive the third image acquisition component 402 to rise and fall.

[0100] The third linear motion mechanism 4011 can be a horizontal sliding shaft equipped with a sliding block that can move on the horizontal sliding shaft, and a third lifting mechanism 4012 mounted thereon, thereby driving the third lifting mechanism 4012 to move horizontally. The third lifting mechanism 4012 can be a vertical sliding shaft equipped with a sliding block that can move on the vertical sliding shaft, and a third image acquisition assembly 402 mounted thereon, thereby driving the third image acquisition assembly 402 to move vertically.

[0101] In some embodiments, the third image acquisition component 402 may include a third area array detection camera 4021 and at least two third contour cameras 4022. Both the third area array detection camera 4021 and the third contour cameras are positioned toward the battery to be tested (only two third contour cameras 4022 are shown in FIG6 , but the number of third contour cameras 4022 is not limited). The third contour camera 4022 is used to capture contour feature images of the top surface of the product to be tested and to perform top surface contour degree detection; the third area array detection camera 4021 is used to capture hole feature images on the top surface of the product to be tested and to perform top panel hole detection. The above-mentioned third image acquisition component 402 can be used to establish product benchmarks, that is, based on the test requirements, the coordinate system features of the product need to be established, and the benchmark establishment logic needs to comply with the "surface, line, and point" logic. When completing the establishment of the A benchmark, a third contour camera 4022 on the top can be used to detect the benchmark point positions around the battery to be tested in the detection area. Secondly, the establishment of the remaining BC benchmarks is completed through the third array detection camera 4021 and the calibrated coordinate system association relationship. Since the B benchmark is located on a platform perpendicular to the A benchmark plane and the left and right positions are far apart, it is necessary to improve the accuracy of the benchmark feature establishment. Therefore, through the third motion device 401, the light source in the direction of the end face inlet and the camera in the direction of the end face outlet are linked so that the two are at the same height to form a backlight environment, which can effectively avoid the impact of product consistency while highlighting the feature edge contour; then, since the direction of the C benchmark has been restricted by the AB benchmark, a third contour camera 4022 can be used to complete the establishment, which can to a certain extent guarantee the accuracy of the detection starting point of each camera in the size detection equipment.

[0102] In some embodiments, when the third image acquisition component 402 includes multiple third contour cameras 4022, each third contour camera 4022 can be set at a different position on the third lifting mechanism 4012, and the field of view directions of different third contour cameras 4022 are different. For example, the third image acquisition component 4022 includes two third contour cameras 4022, one third contour camera 4022 can be set at a first position on the third lifting mechanism 4012, and another third contour camera 4022 can be set at a second position on the third lifting mechanism 4012, and the field of view direction of the third contour camera 4022 at the first position is perpendicular to the field of view direction of the third contour camera 4022 at the second position.

[0103] In some embodiments, before using the third area array inspection camera 4021 and the third contour camera 4022, the pixel sizes of the first area array inspection camera 2022 and the third contour camera 4022 need to be aligned with the working size. The first area array inspection camera 2022 and the third contour camera 4022 can calculate the field of view by measuring the planned workstation working distance and lens parameters, and then calculate the actual distance corresponding to a single pixel based on the corresponding field of view. After the calculation is completed, the theoretical working distance of the third area array inspection camera 4021 and the third contour camera 4022 can be obtained. The third contour camera 4022 can be a 3D line laser camera.

[0104] In some embodiments, the third area array detection camera 4021 and the third contour camera 4022 need to be calibrated in the coordinate system based on the measurement values ​​and image feature values ​​of the calibration block before use; specifically, the corresponding coordinate system rigid body transformation equations and rotation matrix equations can be imported based on the measurement values ​​and image feature values ​​of the corresponding calibration block based on the Euclidean transformation principle to obtain the association relationship between the camera coordinate system and the product coordinate system (or world coordinate system), so that based on this association relationship, the coordinate systems of different cameras at different imaging stations can be projected onto the product coordinate system, thereby constructing a visual testing system through calculation to realize the behavioral tolerance testing function.

[0105] It should be noted that before the calibration is performed based on the calibration block, the metrology room needs to use a higher-level precision metrology device (such as a gantry three-coordinate device) to measure the calibration block to obtain the measurement value of the calibration block. Among them, the design of the calibration block can be 1:1 with the product, and the detection position design features need to be used to simulate the working state of the equipment. In some embodiments, the material of the calibration block should meet the requirements of roughness <3.2 and the fluctuation of the shape and position tolerance of each plane <5% of the test tolerance. In addition, the consistency of the material around the design features of the calibration block should meet its test requirements based on the measurement logic and the arrangement of the measurement points. The calibration is not limited to position, contour, position, and flatness dimensions.

[0106] Any of the above embodiments provides a visual size inspection device for large-size battery packs, wherein a 3D line laser camera (contour camera) is used to correspond to the characteristics and calculation features of multi-point point selection, and a 2D area array camera is used to match the hole positions and sizes with good consistency, thereby improving test efficiency while simplifying the measurement action. At the same time, when measuring the hole size tolerance, the equipment uses end face size cameras in different positions (such as the front camera and the rear light source) to move to form a backlight scene to complete the inspection action. The backlight highlights the characteristics of the thin film hole position while blurring the interference on the product surface, thereby achieving the effect of improving measurement accuracy; secondly, through camera system calibration, large-size product automatic inspection is completed, the entire process is contactless and meets the beat, and each inspection axis system is adjustable for subsequent modification and maintenance and replacement. The two cooperate with each other to achieve a combination of high efficiency and high yield.

[0107] In one embodiment, as shown in FIG7 , the frame 10 in the size detection device shown in FIG1 may include a fixed frame 101 and a lifting platform 102, with the first size detection device 20 and the second size detection device 30 both disposed on the fixed frame 101; the battery to be tested 50 may be disposed in a detection area on the lifting platform 102. In some embodiments, the lifting platform 102 includes a workbench and a fourth lifting mechanism disposed at the bottom of the workbench, and the battery to be tested 50 is disposed in the detection area on the workbench. In some embodiments, the lifting platform 102 further includes a height sensor disposed on the workbench, the height sensor being used to detect the height of the battery to be tested 50 located in the detection area.

[0108] Among them, a tray can be set on the workbench to carry the battery 50 to be tested; the tray can be lifted by a double-cylinder lifting station, at which time the positioning pins of the lifting station will guide the left and right positioning of the tray according to the positioning holes at the bottom of the tray; in some embodiments, the positioning pins have a bevel design, which is convenient for correction when the tray position and the lifting station do not match; in some embodiments, a pull wire is also provided on the lifting platform 102, and the pull wire has a voltage stabilizing circuit and a hard limit to ensure that the height consistency difference of the product at the testing station is within the permitted range. The above-mentioned height sensor can sense the presence or absence of a tray, the presence or absence of materials, etc. by detecting the height of the platform. Moreover, the above-mentioned height sensor can realize the anti-mistake of the mechanism operation and prevent the equipment from colliding when the battery 50 to be tested is not in place. In actual testing equipment, since the battery 50 to be tested is large in size and heavy in weight, and the battery 50 to be tested needs to be benchmarked and positioned during use to ensure the measurement results, it is necessary to design an air path structure with a pressure-stabilizing circuit. At the same time, due to the load-bearing design, a dual-cylinder drive is adopted. In order to prevent the cylinder output from being asynchronous, a multi-solenoid valve control is designed to reduce the asynchronous situation. The pilot valve and the gas tank are designed in the air intake circuit as a pressure-stabilizing circuit, which can ensure the stability of the working pressure to a certain extent. At the same time, it serves as a pressure-stabilizing device after an accidental gas outage to prevent the jacking from falling too quickly, which can ensure the safety of the operator to a certain extent.

[0109] In some embodiments, the fourth lifting mechanism can be a lifting cylinder mechanism, and the fourth lifting mechanism can also be provided with a pressure-stabilizing gas tank 103, a pilot air inlet check valve 104, and a pilot air outlet check valve 105 to independently supply air during operation. In some embodiments, a throttle valve can be designed at the cylinder air inlet to adjust the air intake flow of the air circuit, thereby ensuring that the lifting speeds of the cylinders on both sides are consistent; in some embodiments, the top of the cylinder is provided with a floating joint to reduce the impact of different speeds on the mechanism; the pressure-stabilizing cylinder and the pilot valve can maximize the stability of the air pressure during each lifting, thereby improving the detection accuracy. In some embodiments, a lifting stop can also be provided on the workbench. In some embodiments, in order to ensure data accuracy during operation, it is necessary to ensure that the product is stable and unique in the equipment position, and in order to ensure position stability, a positioning pin based on a one-side two-pin positioning logic can be provided on the workbench.

[0110] In some embodiments, a cabinet may be further provided on the fixed frame 101 , and the cabinet may be used to house devices or components such as a pressure stabilizing tank, a solenoid valve, and a controller.

[0111] In one embodiment, the size detection device shown in Figure 1 also includes a controller (not shown in Figure 1) arranged on the frame 10, and the controller can drive the first motion device 201 to drive the first image acquisition component 202 to move, and drive the second motion device 301 to drive the second image acquisition component 302 to move.

[0112] The controller can be connected to the first motion device 201, the first image acquisition component 202, the second motion device 301, the second image acquisition component 302, the third motion device 401 and the third image acquisition component 402 respectively. When driving the first image acquisition component 202 and the second image acquisition component 302 to acquire the feature image, points can be taken on each feature on the battery 50 to be tested. Among them, the top surface, two measurements, and two end faces of the battery 50 to be tested need to be constructed by the above-mentioned image acquisition component to complete the plane point cloud construction to complete the contour detection. The hole feature on the top needs to be completed by the third image acquisition component 402 on the top to complete the image acquisition and position detection. In some embodiments, the controller can also be connected to the fourth lifting mechanism to control the lifting operation of the workbench to facilitate the feeding and unloading of the battery 50 to be tested and the calibration block. In some embodiments, the controller can also be connected to a height sensor to read the height data collected by the height sensor, so as to determine whether the product on the workbench is in a normal detection state.

[0113] In the embodiment of the present application, the controller can calculate the deviation S1 between the actual characteristic value and the measurement value by the measurement value of the calibration block and the actual characteristic value of the battery 50 to be tested acquired by the aforementioned image acquisition components. At the same time, the transformation equation P between the product coordinate system and the world coordinate system can be obtained by the benchmark and the calibration of each image acquisition component. Based on the above deviation, the following relationship (1) can be obtained: D = L*P-(S0+S1) (1);

[0114] Wherein, D represents the distance from the feature to the discussion reference plane (or discussion reference line) in the world coordinate system of the battery to be tested, L represents a standard distance of the feature of the battery to be tested in the product coordinate system (for example, the distance from the hole to the reference line), S0 represents the characteristic value of the actual feature in the calibration block coordinate system, S1 represents the deviation between the actual characteristic value and the measured value, and P represents the transformation equation between the product coordinate system and the calibration block coordinate system (i.e., the world coordinate system).

[0115] Based on the above relationship (1), and then based on the form and position tolerance calculation method, and based on the deviation amount obtained by the test, the form and position tolerance reference data (for example, straightness, flatness, etc.) is obtained. For another example, the above D can be used to calculate the straightness in the form tolerance. The method provided in the embodiment of the present application can achieve accurate measurement of product data through precise measurement control, thereby significantly reducing the loss of excellent rate of manual testing, while reducing the time occupied by conventional inspection tool maintenance and measurement, and to a certain extent, improving product production efficiency, thereby reducing production costs. It should be noted that the above form and position tolerance calculation method can be an existing form and position tolerance calculation method, for example, it can be divided into form tolerance calculation, position tolerance calculation, orientation tolerance calculation, etc.; wherein, form tolerance calculation includes straightness, flatness, roundness, cylindricity, line profile, surface profile, etc.; orientation tolerance calculation includes parallelism, inclination, verticality, etc.; position tolerance calculation includes position, concentricity, symmetry, etc.; for the specific implementation of the form and position tolerance calculation method, it belongs to the prior art and is not repeated here.

[0116] Based on any of the above-described embodiments of the dimension detection device, a dimension detection process or dimension detection method is implemented, which includes: controlling a first motion device to drive a first image acquisition component to move to a detection area to detect a battery to be tested, and controlling a second motion device to drive the second image acquisition component to move to the detection area to detect the battery to be tested, thereby obtaining a detection result. Specifically, during the detection process, the battery to be tested can be placed on a workbench in a rack; the first motion device is driven to drive the first image acquisition component to a first fixed position near the battery in the detection area, and the second motion device is driven to drive the second image acquisition component to a second fixed position near the battery in the detection area, so that the first image acquisition component and the second image acquisition component can respectively capture images of the battery; before a specific test, the first image acquisition component and the second image acquisition component can be calibrated based on a calibration block to establish an association between the world coordinate system and the camera coordinate system of the measurement point, or to establish an association between the product coordinate system and the camera coordinate system of the measurement point. During the specific test, the actual measured size can be calculated based on the above association. The size detection method described in the embodiment of the present application can use a motion device and an image acquisition component to automatically take pictures of oversized batteries, and can automatically capture measurement points, realizing a fully automatic detection method, thereby completing the detection of oversized batteries more efficiently and accurately.

[0117] In some embodiments, based on the size detection device described in any of the above embodiments, another size detection process or size detection method is provided, as shown in Figure 8, including: S501, debugging the position of the first image acquisition component and the position of the second image acquisition component; S502, calibrating the accuracy of the first image acquisition component and the second image acquisition component; S503, measuring the calibration block to obtain the measurement value of the calibration block; S504, controlling the first motion device to drive the first image acquisition component to move to the detection area toward the calibration block for image acquisition, and controlling the second motion device to drive the second image acquisition component to move to the detection area toward the calibration block for image acquisition, to obtain the image feature value of the calibration block; S505, according to the measurement value of the calibration block and the calibration block The image characteristic value of the calibration block is used to calibrate the coordinate system of the first image acquisition component and the second image acquisition component; S506, driving the fourth lifting mechanism to place the battery to be tested in the detection area, and establishing the product benchmark according to the calibrated first image acquisition component and the second image acquisition component to obtain the first image acquisition component and the second image acquisition component after the benchmark is established; S507, controlling the first motion device to drive the first image acquisition component after the benchmark is established to move to the detection area to capture the image of the battery, and controlling the second motion device to drive the second image acquisition component after the benchmark is established to move to the detection area to capture the image of the battery, and obtaining the characteristic image of the battery; S508, calculating according to the characteristic image of the battery and the measurement value of the calibration block to obtain the detection result.

[0118] It should be noted that when the computer device measures the calibration block, it can use a measuring instrument to measure the calibration block to obtain the measurement value of the calibration block; in some embodiments, the computer device can also control the fourth lifting mechanism at the bottom of the workbench to place the preset calibration block in the detection area, and measure the calibration block in the detection area to obtain the measurement value of the calibration block.

[0119] The dimension detection equipment described in any of the above embodiments can solve the following problems: 1) The automatic detection process replaces manual inspection by personnel, which improves the production line efficiency while reducing the lifting size and improving the equipment quality rate; 2) The dimension detection equipment is a visual inspection equipment, which can improve the detection accuracy, and the image acquisition components thereon can accurately detect form and position tolerances after spatial calibration, and can output quantitative data and reports for process optimization; 3) The image acquisition component in the dimension detection equipment also adopts an optimized lighting method, which can improve the dimensional tolerance detection accuracy and improve the equipment's compatibility with product incoming material fluctuations.

[0120] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0121] Debugging the positions of the first image acquisition component and the second image acquisition component;

[0122] Performing precision calibration on the first image acquisition component and the second image acquisition component;

[0123] Measuring the calibration block to obtain a measurement value of the calibration block;

[0124] Controlling the first motion device to drive the first image acquisition component to move to the detection area toward the calibration block for image acquisition, and controlling the second motion device to drive the second image acquisition component to move to the detection area toward the calibration block for image acquisition, to obtain image feature values ​​of the calibration block;

[0125] Calibrate the coordinate systems of the first image acquisition component and the second image acquisition component according to the measurement value of the calibration block and the image feature value of the calibration block;

[0126] Driving the fourth lifting mechanism to place the battery to be tested in the detection area, establishing a product benchmark based on the calibrated first image acquisition component and the second image acquisition component, and obtaining the first image acquisition component and the second image acquisition component after the benchmark is established;

[0127] Controlling the first motion device to drive the first image acquisition component after the reference is established to move to the detection area to acquire an image of the battery, and controlling the second motion device to drive the second image acquisition component after the reference is established to move to the detection area to acquire an image of the battery, thereby obtaining a characteristic image of the battery;

[0128] The detection result is obtained by calculation based on the characteristic image of the battery and the measurement value of the calibration block.

[0129] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0130] Debugging the positions of the first image acquisition component and the second image acquisition component;

[0131] Performing precision calibration on the first image acquisition component and the second image acquisition component;

[0132] Measuring the calibration block to obtain a measurement value of the calibration block;

[0133] Controlling the first motion device to drive the first image acquisition component to move to the detection area toward the calibration block for image acquisition, and controlling the second motion device to drive the second image acquisition component to move to the detection area toward the calibration block for image acquisition, to obtain image feature values ​​of the calibration block;

[0134] Calibrate the coordinate systems of the first image acquisition component and the second image acquisition component according to the measurement value of the calibration block and the image feature value of the calibration block;

[0135] Driving the fourth lifting mechanism to place the battery to be tested in the detection area, establishing a product benchmark based on the calibrated first image acquisition component and the second image acquisition component, and obtaining the first image acquisition component and the second image acquisition component after the benchmark is established;

[0136] Controlling the first motion device to drive the first image acquisition component after the reference is established to move to the detection area to acquire an image of the battery, and controlling the second motion device to drive the second image acquisition component after the reference is established to move to the detection area to acquire an image of the battery, thereby obtaining a characteristic image of the battery;

[0137] The detection result is obtained by calculation based on the characteristic image of the battery and the measurement value of the calibration block.

[0138] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0139] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0140] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0141] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A dimension detection device, wherein, Including: A frame, a battery under test is arranged in a detection area of the frame; At least two first-size detection devices, arranged on the frame, and the at least two first-size detection devices are located on opposite sides of the battery under test; At least two second-size detection devices, arranged on the frame, and the at least two second-size detection devices are located on the other opposite sides of the battery under test; Wherein, the first-size detection device includes a first motion device and a first image acquisition component, and the first motion device can drive the first image acquisition component to move; The second-size detection device includes a second motion device and a second image acquisition component, and the second motion device can drive the second image acquisition component to move; Wherein, the first motion device includes a first linear motion mechanism and a first lifting mechanism, the first linear motion mechanism is configured to be able to drive the first lifting mechanism to move along a first direction, the first direction is in a horizontal plane, the first image acquisition component is installed on the first lifting mechanism, and the first lifting mechanism is configured to be able to drive the first image acquisition component to lift; The second motion device includes a second linear motion mechanism and a second lifting mechanism, the second linear motion mechanism is configured to be able to drive the second lifting mechanism to move along a second direction, the second direction is in a horizontal plane and intersects with the first direction, the second image acquisition component is installed on the second lifting mechanism, and the second lifting mechanism is configured to be able to drive the second image acquisition component to lift.

2. The dimension detection device according to claim 1, wherein The first image acquisition component includes a first contour camera and at least one first area array detection camera, and both the first contour camera and the first area array detection camera are arranged facing the battery under test.

3. The dimension detection device according to claim 2, wherein, The second image acquisition component includes a second contour camera and at least one second area array detection camera, and both the second contour camera and the second area array detection camera are arranged facing the battery under test.

4. The dimension detection device according to claim 1, wherein, The size detection device further includes a third-size detection device, the third-size detection device is arranged on the frame, the third-size detection device includes a third motion device and a third image acquisition component, the third image acquisition component is located above the battery under test, and the third motion device can drive the third image acquisition component to move.

5. The dimensional inspection device according to claim 4, wherein, The third motion device includes a third linear motion mechanism and a third lifting mechanism, the third linear motion mechanism is configured to be able to drive the third lifting mechanism to move along the first direction or the second direction, the second direction is in a horizontal plane and intersects with the first direction, the third image acquisition component is installed on the third lifting mechanism, and the third lifting mechanism is configured to be able to drive the third image acquisition component to lift.

6. The dimension detection device according to claim 4, wherein, The third image acquisition component includes a third area array detection camera and at least two third contour cameras, and both the third area array detection camera and the third contour cameras are arranged facing the battery under test.

7. The dimensional inspection device according to claim 1, wherein, The frame includes a fixed frame body and a lifting table, and both the first-size detection device and the second-size detection device are arranged on the fixed frame body; The battery under test is arranged in a detection area on the lifting table.

8. The dimension detection device according to claim 7, wherein, The lifting table includes a workbench and a fourth lifting mechanism arranged at the bottom of the workbench, and the battery to be measured is arranged in the detection area on the workbench.

9. The dimensional inspection device according to claim 8, wherein, The lifting table further includes a height sensor arranged on the workbench, and the height sensor is used to detect the height of the battery to be measured in the detection area.

10. The dimension detection device according to claim 1, wherein, The dimension detection device further includes a controller arranged on the frame, and the controller can drive the first motion device to drive the first image acquisition component to move, and drive the second motion device to drive the second image acquisition component to move.

11. A dimension detection method, wherein, The dimension detection method is applied to the dimension detection device according to any one of claims 1-10, and the dimension detection method includes: Controlling the first motion device to drive the first image acquisition component to move to the detection area to detect the battery to be measured, and controlling the second motion device to drive the second image acquisition component to move to the detection area to detect the battery to be measured, so as to obtain a detection result.

12. The method according to claim 11, wherein, The method further includes: Calibrating the coordinate systems of the first image acquisition component and the second image acquisition component according to the measured value of a preset calibration block and the image feature value of the calibration block, so as to obtain a calibrated first image acquisition component and a calibrated second image acquisition component; The controlling the first motion device to drive the first image acquisition component to move to the detection area to detect the battery to be measured, and controlling the second motion device to drive the second image acquisition component to move to the detection area to detect the battery to be measured, so as to obtain a detection result, includes: Controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to detect the battery to be measured, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to detect the battery to be measured, so as to obtain a detection result.

13. The method according to claim 12, wherein, The frame in the dimension detection device includes a fixed frame body and a lifting table, the lifting table includes a workbench and a fourth lifting mechanism arranged at the bottom of the workbench, and the method for obtaining the measured value of the calibration block includes: Controlling the fourth lifting mechanism to place a preset calibration block in the detection area; Measuring the calibration block to obtain the measured value of the calibration block.

14. The method according to claim 12, wherein, Obtaining the image feature value of the calibration block includes: Controlling the first motion device to drive the first image acquisition component to move to the detection area to perform image acquisition on the calibration block, and controlling the second motion device to drive the second image acquisition component to move to the detection area to perform image acquisition on the calibration block, so as to obtain the image feature value of the calibration block.

15. The method according to claim 13, wherein, The controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to detect the battery to be measured, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to detect the battery to be measured, so as to obtain a detection result, includes: Driving the fourth lifting mechanism to place the battery to be measured in the detection area; Controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to acquire an image of the battery under test, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to acquire an image of the battery under test, so as to obtain a characteristic image of the battery under test; Obtaining a detection result according to the characteristic image of the battery under test and the measurement value of the calibration block.

16. The method according to claim 15, wherein The method further includes: Establishing a product reference based on the calibrated first image acquisition component and second image acquisition component to obtain the first image acquisition component and second image acquisition component after reference establishment; The controlling the first motion device to drive the calibrated first image acquisition component to move to the detection area to acquire an image of the battery under test, and controlling the second motion device to drive the calibrated second image acquisition component to move to the detection area to acquire an image of the battery under test, so as to obtain a characteristic image of the battery under test, includes: Controlling the first motion device to drive the first image acquisition component after reference establishment to move to the detection area to acquire an image of the battery under test, and controlling the second motion device to drive the second image acquisition component after reference establishment to move to the detection area to acquire an image of the battery under test, so as to obtain a characteristic image of the battery under test.

17. The method according to claim 11, wherein The method further includes: Debugging the positions of the first image acquisition component and the second image acquisition component.

18. The method according to claim 11, wherein, The method further includes: Performing accuracy calibration on the first image acquisition component and the second image acquisition component.

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