PDM-based steel shell battery surface detection device

Abstract

The invention provides a PDM-based steel shell battery surface detection device, and belongs to the field of optical detection.The PDM-based steel shell battery surface detection device comprises a belt conveying module, a PDM acquisition module, a PDM light source, a detection verification module and a processor, the PDM acquisition module and the PDM light source are arranged in an obliquely opposite mode, and the processor determines light deflection according to phase information of stripes acquired by the PDM acquisition module; and integrating to establish a three-dimensional surface shape of the surface of the measured steel shell battery. The detection and verification module comprises a surface scanning camera unit and an annular optical assembly; and the processor performs comparison and verification according to an image acquired by the surface scanning camera unit and an image processed by the PDM acquisition module. The steel shell battery surface detection device can well adapt to influences caused by surface reflection of the steel shell battery, surface 3D detection is achieved through integral reconstruction, detection verification is additionally arranged, the measurement accuracy is guaranteed, and the steel shell battery surface detection device is convenient to apply and popularize in the field of soft and hard package battery detection.

Description

Technical Field

[0001] The present invention belongs to the field of optical detection, and particularly relates to a surface detection device for steel shell batteries based on PDM. Background Art

[0002] Steel shell batteries are a type of battery with a steel shell. Due to their high strength, corrosion resistance, detachable, replaceable, good stability and safety, they are widely used in fields such as mobile phone batteries, electric vehicles, and energy storage systems.

[0003] For steel shell batteries formed by stamping, their surfaces often have defects such as cracks, scratches, sand holes or holes. When the crack depth exceeds 10% of the wall thickness and the scratch length ≥ 5 mm, the battery is prone to problems such as electrolyte leakage or accelerated corrosion. For the surface detection of batteries with low precision requirements, a conventional CCD camera is sufficient.

[0004] However, in practical applications, the applicant has found that for steel shell batteries with a metal surface that is prone to reflection, the reflected light often affects the detection effect, resulting in the failure of image acquisition or a reduction in quality. Therefore, it is necessary to develop a new type of surface detection device for the case of easy reflection on the surface of steel shell batteries. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a surface detection device for steel shell batteries based on PDM, which can solve the above problems.

[0006] A surface detection device for steel shell batteries based on PDM includes a belt conveyor module, a PDM acquisition module, a PDM light source and a processor. The PDM acquisition module and the PDM light source are arranged obliquely opposite to each other. The processor determines the light deflection according to the phase information of the fringes collected by the PDM acquisition module, and thus integrally establishes the three-dimensional surface shape of the surface of the steel shell battery to be measured.

[0007] Further, the PDM acquisition module includes a PDM optical acquisition unit, a collection height support frame, a collection transverse adjustment adapter plate group, and a collection longitudinal position and angle adjustment plate group.

[0008] Further, the PDM light source includes a PDM light source body, a light source rotation adapter and a light source height adjustment support frame.

[0009] Further, an ion wind rod is also provided at the upstream end of the belt conveyor module, and the ion wind rod is used for dust removal on the surface of the battery before detection.

[0010] Further, the surface detection device for steel shell batteries further includes a detection and verification module, which includes a surface scanning camera unit and an annular light component; the surface scanning camera unit and the annular light component are arranged above the belt conveying module from top to bottom; the processor compares and verifies the images collected by the surface scanning camera unit with the images obtained by processing the PDM acquisition module.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the surface detection device for steel shell batteries of the present application, the influence caused by the surface reflection of steel shell batteries can be well adapted, the surface 3D detection is realized through integral reconstruction, the detection and verification are added, the measurement accuracy is guaranteed, and it is convenient to be popularized and applied in the detection field of soft and hard package batteries. Brief Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the surface detection device for steel shell batteries based on PDM of the present invention;

[0013] Figure 2 It is a schematic diagram of the surface detection device for steel shell batteries with added detection and verification.

[0014] In the figure:

[0015] 1. Belt conveying module;

[0016] 2. PDM acquisition module; <*

[0017] 3. PDM light source;

[0018] 4. Ion wind rod;

[0019] 5. Surface scanning camera unit;

[0020] 6. Annular light component;

[0021] 7. Open-hole surface light source. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1

[0024] A surface detection device for steel shell batteries based on PDM, see Figure 1, the surface detection device for steel shell batteries includes a belt conveyor module 1, a PDM acquisition module 2, a PDM light source 3 and a processor. The PDM acquisition module 2 and the PDM light source 3 are arranged obliquely opposite to each other. The processor determines the light deflection according to the phase information of the stripes collected by the PDM acquisition module 2, and thus integrally establishes the three-dimensional surface of the surface of the steel shell battery to be measured.

[0025] The belt conveyor module 1 is arranged horizontally and longitudinally and is driven by a motor pulley. The PDM acquisition module 2 includes a PDM optical acquisition unit, an acquisition height support frame, an acquisition transverse adjustment adapter plate group, and an acquisition longitudinal position and angle adjustment plate group. The PDM light source 3 includes a PDM light source body, a light source rotation adapter, and a light source height adjustment support frame.

[0026] Furthermore, an ion wind bar 4 is also provided at the upstream end of the belt conveyor module 1. The ion wind bar 4 is used for dust removal on the surface of the battery before detection.

[0027] Embodiment 2

[0028] See Figure 2 , the surface detection device for steel shell batteries further includes a detection and verification module. The detection and verification module includes a surface scanning camera unit 5 and an annular light assembly 6; the surface scanning camera unit 5 and the annular light assembly 6 are arranged vertically above the belt conveyor module 1; the processor compares and verifies the image collected by the surface scanning camera unit 5 with the image obtained by processing the PDM acquisition module 2.

[0029] The position of the detection and verification module is not limited. It can be set upstream of the PDM acquisition module 2 or downstream of the PDM acquisition module 2.

[0030] Furthermore, the detection and verification module further includes an open-hole surface light source 7, and the open-hole surface light source 7 is arranged between the surface scanning camera unit 5 and the annular light assembly 6.

[0031] This device can well detect the size, surface flatness, pits, sand holes, holes, scratches and dirt of the steel shell battery. After verification, the accuracy rate is high.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A surface detection device for steel shell batteries based on PDM, characterized in that: The surface detection device for steel shell batteries includes a belt conveyor module (1), a PDM acquisition module (2), a PDM light source (3) and a processor. The PDM acquisition module (2) and the PDM light source (3) are arranged obliquely opposite to each other. The processor determines the light deflection according to the phase information of the stripes collected by the PDM acquisition module (2), thereby integrating to establish the three-dimensional surface shape of the surface of the steel shell battery to be measured.

2. The surface detection device for steel shell batteries according to claim 1, characterized in that: The belt conveyor module (1) is arranged horizontally and longitudinally and is driven by a motor pulley.

3. The surface detection device for steel shell batteries according to claim 1, characterized in that: The PDM acquisition module (2) includes a PDM optical acquisition unit, a collection height support frame, a collection transverse adjustment adapter plate group, and a collection longitudinal position and angle adjustment plate group.

4. The surface detection device for the steel shell battery according to claim 1, wherein: The PDM light source (3) includes a PDM light source body, a light source rotation adapter, and a light source height adjustment support frame.

5. The surface detection device for steel shell batteries according to claim 1, wherein: An ion wind rod (4) is further provided at the upstream end of the belt conveyor module (1), and the ion wind rod (4) is used for dust removal on the surface of the battery before detection.

6. The surface detection device for the steel shell battery according to claim 1, characterized in that: The surface detection device for steel shell batteries further includes a detection and verification module, and the detection and verification module includes a surface scanning camera unit (5) and an annular light assembly (6); the surface scanning camera unit (5) and the annular light assembly (6) are arranged vertically above the belt conveyor module (1); the processor compares and verifies the image collected by the surface scanning camera unit (5) with the image obtained by processing the PDM acquisition module (2).

7. The surface detection device for the steel shell battery according to claim 1, characterized in that: The detection and verification module further includes an open-hole surface light source (7), and the open-hole surface light source (7) is arranged between the surface scanning camera unit (5) and the annular light assembly (6).

Images