CN110208283A - A kind of method and device detecting battery core surface defect - Google Patents
A kind of method and device detecting battery core surface defect Download PDFInfo
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- CN110208283A CN110208283A CN201910431360.XA CN201910431360A CN110208283A CN 110208283 A CN110208283 A CN 110208283A CN 201910431360 A CN201910431360 A CN 201910431360A CN 110208283 A CN110208283 A CN 110208283A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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Abstract
The present invention provides a kind of method for detecting battery core surface defect, comprising: second step (S2) is irradiated battery core using infrared light；Third step (S3), image of the acquisition by the battery core of Infrared irradiation, to obtain infrared radiation image；And four steps (S4), the surface defect of the battery core is determined according to the infrared radiation image.The method of another kind detection battery core surface defect further includes first step (S1) before second step (S2): dedusting is blowed to the battery core.The present invention proposes that a kind of new optical mode carries out the dedusting in battery core defects detection, dust-removing can be added simultaneously, the defect on new battery core surface can be introduced when avoiding battery core surface defects detection using contact dedusting method due to battery core soft surface, while can also filter out the dust of enormous proportions by the method for Infrared irradiation.
Description
Technical field
This patent disclosure relates generally to defects detection fields, more particularly, to a kind of technology of battery core surface defects detection.
Background technique
In modern industrial production, many automation open defect detections are needed in some special stations to product surface
It just can be carried out open defect detection after carrying out dust cleaning, the especially required defect detected is easy by dust and similar dust
Some extraneous detection contents interference so that automatic optical detection equipment cross inspection problem be difficult to control, cause detection judge by accident.
So before carrying out defects detection, it will usually operation first is dusted to examined object, in order to avoid the ash of body surface attachment
The defects detection on dirt or dust analog interfering object surface.Common dust removal operation is the mode using contact to detection pair
As being dusted, such as using spraying-rinsing, but some products cannot use the dedusting of contact mode due to self reason.
For example the defects detection on battery core surface is also easy to produce new defect because battery core packaging is softer by external force when cleaning using contact,
Lead to the damage of battery core, therefore the detection of battery core appearance is to carry out appearance again after inconvenience uses the mode of contact to carry out dust cleaning to lack
Fall into detection.
Summary of the invention
In view of the above problems, it is an object of the invention to overcome doing for the dust that battery core surface can not be discharged in the prior art
The difficulty for accurately detecting the defect on battery core surface is disturbed, a kind of method and device detecting battery core surface defect is provided.
First technical solution according to the present invention provides a kind of method for detecting battery core surface defect, comprising: second step
(S2), battery core is irradiated using infrared light；Third step (S3), image of the acquisition by the battery core of Infrared irradiation, with
Obtain infrared radiation image；And four steps (S4), determine that the surface of the battery core is lacked according to the infrared radiation image
It falls into.
Second technical solution is based on the first technical solution, wherein the color of the battery core is dark color.
Third technical solution is based on the first technical solution, wherein the color of the battery core is black.
4th technical solution is based on the first technical solution, wherein the battery core is the battery core of soft surface.
5th technical solution is based on the first technical solution, wherein the defect is leakage metal defect.
6th technical solution is based on the first technical solution, wherein further comprises: first step (S1), described second
Before step (S2), dedusting is blowed to the battery core.
7th technical solution is based on the 6th technical solution, wherein battery core when dedusting is blowed completes dust-removing
Afterwards battery core move away or battery core complete dust-removing after hair dryer move away.
8th technical solution is based on the 7th technical solution, wherein the side that dedusting includes: blowing is blowed to the battery core
To the first angle with the battery core surface less than 90 degree.
9th technical solution is based on the 8th technical solution, wherein first angle is 10-60 degree.
Tenth technical solution is based on any one into the 9th technical solution of the first technical solution, wherein using infrared
Light is irradiated the battery core by dust-removing
Second angle on the direction of Infrared irradiation and the battery core surface is less than 90 degree.
11st technical solution is based on the tenth technical solution, wherein second angle is 10-60 degree.
12nd technical solution is based on the tenth technical solution, wherein the light source of the infrared light is area source.
13rd technical solution is based on the 12nd technical solution, wherein the light source of the infrared light is multiple.
14th technical solution is based on the 13rd technical solution, wherein the light source of infrared light is 2, the light of red face light
Source is 2, and the light source of 2 infrared lights is opposite, and the light source of two red lights is opposite, is separately positioned on the four direction of the battery core
On.
15th technical solution is based on the first technical solution, wherein image packet of the acquisition by the battery core of Infrared irradiation
It includes: acquiring the image of the battery core in 90 degree of direction with the surface of the battery core.
16th technical solution is based on the first technical solution, wherein determines the electricity according to the infrared radiation image
The surface defect of core includes: to search the non-uniform region of pixel on infrared radiation image, regards as surface defect areas.
17th technical solution according to the present invention provides a kind of device for detecting battery core surface defect, comprising: detection work
Position, for placing the battery core；Infrared irradiation station, for being irradiated using infrared light to battery core；Photograph taking station,
For acquiring the image for passing through the battery core of Infrared irradiation, to obtain infrared radiation image.
18th technical solution is based on the 17th technical solution, wherein the color of the battery core is dark color.
19th technical solution is based on the 17th technical solution, wherein the color of the battery core is black.
20th technical solution is based on the 17th technical solution, wherein the battery core is the battery core of soft surface.
21st technical solution is based on the 17th technical solution, wherein the defect is leakage metal defect.
22nd technical solution is based on the 17th technical solution, further comprises: blowing station, for described infrared
Before light is irradiated battery core, dedusting is blowed to the battery core.
23rd technical solution is based on the 22nd technical solution, and battery core when dedusting is blowed is completed blowing and removed
After dirt battery core move away or battery core complete dust-removing after hair dryer move away.
24th technical solution is based on the 23rd technical solution, wherein dedusting, which is blowed, to the battery core includes:
First angle on the direction of blowing and the battery core surface is less than 90 degree.
25th technical solution is based on the 24th technical solution, wherein first angle is 10-60 degree.
26th technical solution is based on described in any one of the 17th technical solution to the 25th technical solution
Device, wherein be irradiated to by the battery core of dust-removing using infrared light and include:
Second angle on the direction of Infrared irradiation and the battery core surface is less than 90 degree.
27th technical solution is based on the 26th technical solution, wherein second angle is 10-60 degree.
28th technical solution is based on the 26th technical solution, wherein the light source of the infrared light is area source.
29th technical solution is based on the 28th technical solution, wherein the light source of the infrared light is multiple.
30th technical solution is based on the 29th technical solution, wherein the light source of infrared light is 2, red face light
Light source is 2, and the light source of 2 infrared lights is opposite, and the light source of two red lights is opposite, is separately positioned on four sides of the battery core
Upwards.
31st technical solution is based on the 17th technical solution, wherein figure of the acquisition by the battery core of Infrared irradiation
As including:
The image of the battery core is acquired in 90 degree of direction with the surface of the battery core.
32nd technical solution is based on the 17th technical solution, wherein according to the infrared radiation image to determine
The surface defect for stating battery core includes: to search the non-uniform region of pixel on infrared radiation image, regards as surface defect areas.
The present invention has the advantages that
1) according to the technique and scheme of the present invention, the dust for being attached to battery core surface is blown first by the way of dust-removing
It walks, avoids the deformation using battery core surface caused by contact clean method, avoid and introduced in dust removal process to battery core
New surface defect.
2) then technical method according to the present invention is taken pictures again by the battery core surface that infrared light polishing irradiation is detected
The image for acquiring the battery core surface that this is irradiated by infrared light polishing, since the diffraction effect of infrared light causes infrared light to metal
Sensitivity, i.e., infrared light cannot through metal but can penetrate dust so that metal sites are reflected into the light in photographing device CCD
It is become apparent from than dust, the image Shi Huirang dust on acquisition Infrared irradiation to light dust is more light in this way, and acquires and shine
The image Shi Huirang battery core being mapped in battery core is apparent, and the image acquired in this way can filter dust and do to battery core surface defect
It disturbs, it is easier to detect the defect on battery core surface.
Detailed description of the invention
Fig. 1 shows a kind of flow chart of embodiment for detecting battery core surface defect according to the present invention.
Fig. 2 shows the flow charts for the embodiment that battery core surface defect is detected according to this another kind of the invention.
Fig. 3 shows a kind of structure chart of device for detecting battery core surface defect according to the present invention.
Fig. 4 shows the structure chart of the device of another detection battery core surface defect according to the present invention.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, and reference label refers to the group in the present invention
Part, technology, realizing under appropriate circumstances so as to advantages and features of the invention can be easier to be understood.Following description is pair
The materialization of the claims in the present invention, and other specific implementations not clearly stated relevant to claim also belong to power
The range that benefit requires.
Fig. 1 shows a kind of flow chart of embodiment for detecting battery core surface defect according to the present invention
As shown in Figure 1, providing a kind of method for detecting battery core surface defect, comprising: second step (S2) utilizes infrared light
Battery core is irradiated；Third step (S3), image of the acquisition by the battery core of Infrared irradiation, to obtain infrared radiation figure
Picture；And four steps (S4), the surface defect of the battery core is determined according to the infrared radiation image.
In the present invention, after irradiating battery core surface to be detected using infrared light polishing, then the image on battery core surface is acquired, according to
The image on the battery core surface of acquisition determines the surface defect of battery core.Because the diffraction effect of infrared light causes infrared light to metal
Sensitivity, i.e. infrared light cannot penetrate metal but can penetrate dust, so that metal sites are reflected into the light ratio in photographing device CCD
Dust becomes apparent from, and the image Shi Huirang dust on acquisition Infrared irradiation to light dust is more light in this way, and acquires irradiation
Image Shi Huirang battery core on to battery core is apparent, and the image acquired in this way can filter dust and do to battery core surface defect
It disturbs, it is easier to detect the defect on battery core surface.The defect on the battery core surface of infrared light polishing irradiation is used not using above-mentioned characteristic
Again by the interference of dust, dust becomes very light, the non-uniform region of the pixel the observed i.e. defect area on battery core surface
Domain.
In the prior art, the dust on contact cleaning mode removal examined object surface is generallyd use, such as water spray is clearly
It washes, however due to battery core soft surface, the defect that battery core surface can be caused new in water spray using water jet cleaning method, in this way
Do not facilitate the defects detection on battery core surface not only, it is artificial instead to introduce new defect.Therefore the infrared light that the present invention uses
Polishing battery core surface acquires the image behind Infrared irradiation battery core surface again, optical instrument " filtering " dust has been used, so that electric
The dust removal step of core defects detection is simple and easy, and " filtering " dust works well.
Further, based on a kind of method for detecting battery core surface defect shown in FIG. 1, further includes: the battery core
Color is dark color.
The color of battery core is further defined herein for dark color, because dark object is relatively sharp under Infrared irradiation.
Further, based on a kind of method for detecting battery core surface defect shown in FIG. 1, further includes: the battery core
Color is black.
The color for more clearly defining battery core herein is black, and black object is clearest under the irradiation of infrared light
, therefore when battery core is black, the effect for detecting surface defect is best.
Further, based on a kind of method for detecting battery core surface defect shown in FIG. 1, further includes: the battery core is
The battery core of soft surface.
Explicitly pointing out battery core to be detected herein is soft surface.Because only that the battery core of soft surface just needs to use
The method of optical filtering dust, because of the examined object not generation change under the method for contact removal dust that surface is firm
Shape increases the problem of defect newly.
Further, based on a kind of method for detecting battery core surface defect shown in FIG. 1, further includes: the defect is
Leak metal defect.
The defect on battery core surface to be detected is explicitly pointed out herein as leakage metal defect, leakage metal defect is battery core table
The scratch in face arrives the metal leakage of internal layer deeply.
Further, the method for another detection battery core surface defect as shown in Figure 2, further includes: first step
(S1), before the second step (S2), dedusting is blowed to the battery core.
A dedusting link is further increased herein, i.e., before infrared polishing is taken pictures, first allows battery core to be detected
By a dust-removing, it is often the case that dedusting is blowed by a blowing station, so contactless dedusting side
The new battery core defect of the introducing of contact dedusting method can be effectively avoided in formula.It is tested by many experiments, only blowing dress
Battery core surface before and after dust-removing is compared, is not removed by the dust of the battery core that can go out when the dedusting set surface 51%-64%
Dust be that the sticking little particles of some tools are not easy the dust blown off；It is above-mentioned with viscous when increasing the polishing filtering of infrared light
Property the 95%-98% of little particle dust can be filtered out in imaging, effect is obviously improved, and can be very good to meet detection
The demand of surface defect.Meanwhile we carry out in infrared light dedusting using dust-removing and do not use the effect of dust-removing
Comparison.As shown in Table 1 and Table 2, wherein battery core sum is the number of all battery cores for participating in defects detections, and it is electric that dust, which crosses inspection number,
Core does not have defect but because the dust in battery core is misjudged at defective, and dust crosses inspection rate, and to be that above-mentioned dust crosses inspection number/battery core total
Number.It is obtained by Tables 1 and 2 after dust-removing is added, dust is crossed inspection rate and substantially reduced, and the interference of defects detection drops in dust significantly
It is low.
Table 1 only has infrared light dedusting, no blowing device
| Battery core sum | Dust crosses inspection number | Dust crosses inspection rate |
| 988 | 233 | 23.6% |
2 infrared lights of table+blowing device dedusting
| Battery core sum | Dust crosses inspection number | Dust crosses inspection rate |
| 220 | 2 | 0.91% |
Further, based on a kind of method for detecting battery core surface defect shown in Fig. 2, further includes: be blowed and remove
When dirt battery core complete dust-removing after battery core move away or battery core complete dust-removing after hair dryer move away.
The workflow of blowing station is further defined herein, and there are two types of possible: one is defects to be detected
Battery core first carries out dust-removing, carries out image in mobile battery core to the station of infrared polishing Image Acquisition after dust-removing and adopts
Collection；Another kind is that first dedusting is blowed to battery core to be detected in blowing device, and mobile blowing device arrives after dust-removing
At where next battery core for needing dust-removing.
Further, based on the above embodiment, wherein the direction that dedusting includes: blowing is blowed to the battery core
The first angle with battery core surface is less than 90 degree.
The direction of blowing is further limited at this time, and the direction of blowing and first angle on battery core surface are less than 90 degree.Generally
It is all that wind is sideling allowed to be gone over that dust granule in certain plane, which is blown away, those dust granules are good to be blown off, if vertically
Blown on toward plane, it is possible to dust granule blown it is stronger it is viscous in the plane.
Further, based on the above embodiment, wherein first angle is 10-60 degree.
Further limiting the first angle at this time is 10-60 degree, when the range of the first angle is when 10-60 is spent, dust granule
More easily by plane of blowing off.
Further, using infrared light to by dust-removing battery core be irradiated include: Infrared irradiation side
To the second angle with battery core surface less than 90 degree.
The direction of infrared polishing is further limited at this time, and the direction of Infrared irradiation is less than with second angle on battery core surface
90 degree.Shoot the surface of mutually confidential face battery core to be detected under normal circumstances, then infrared polishing be usually exactly sideling irradiate into
Come, therefore the second angle is less than 90 degree.
Further, based on the above embodiment, the second angle is 10-60 degree.
Further limiting the second angle herein is 10-60 degree, when the range of the second angle is when 10-60 is spent, dust granule
More easily all it is irradiated to.
Further, according to still another embodiment of the present invention, the light source of infrared light is area source.
The light source of infrared light is clearly limited herein as area source.Since it is desired that is irradiated is the dust in entire plane, and
The light that point light source emits can not irradiate an entire plane, therefore be irradiated using area source.
Further, according to above-described embodiment, the light source of the infrared light is multiple.
The light source of clearly restriction infrared light has multiple herein, i.e., beats from surface of multiple angles to battery core to be detected
Light ensure that most dust is all arrived by Infrared irradiation.
Further, according to above-described embodiment, the light source of infrared light is 2, and the light source of red face light is 2, and 2 red
The light source of outer light is opposite, and the light source of two red lights is opposite, is separately positioned on the four direction of the battery core.
Number and the placement position of infrared light light source are more clearly defined herein, and increase two red face light
Light source simultaneously illustrates their placement position.The arrangement method proposed herein is put around battery core, altogether four blocks of light sources, two
A is infrared light light source, and two are red face radiants.Usually their extended line is crossed to form a rectangle, it is preferable that it
Extended line be crossed to form a square.Because infrared light wavelength is longer than feux rouges, the CCD of photographing device is infrared in reception
When the light of two kinds of different wave lengths of light and feux rouges, it is desirable that the object that the different depth of field could allow under two kinds of different light sources will be arranged in camera lens
Shooting clear, we here be that dust is blurred by the variation of the CCD depth of field at different wavelengths.Wherein, red light
Face is used to detect the defect of battery core surface irregularity, and infrared light is for detecting leakage metal defect.
Further, it is based on flow chart shown in FIG. 1, image of the acquisition by the battery core of Infrared irradiation includes: and electricity
Wicking surface acquires the image of the battery core in 90 degree of direction.
The direction of Image Acquisition is clearly defined herein, i.e., acquires the battery core in 90 degree of direction with battery core surface
Image can become apparent from the image for acquiring battery core surface more in large area in this way.
Further, it is based on flow chart shown in FIG. 1, the surface of the battery core is determined according to the infrared radiation image
Defect includes: to search the non-uniform region of pixel on infrared radiation image, regards as surface defect areas.
The method for finding surface defect on infrared radiation image is further specified herein, that is, is made discovery from observation
Obviously there is difference outstanding in the non-uniform region of pixel, i.e. somewhere pixel relative to its surrounding pixel, then assert picture at this
Element is defect area.
Fig. 3 shows a kind of structure chart of device for detecting battery core surface defect according to the present invention
As shown in figure 3, providing a kind of device for detecting battery core surface defect, comprising: detection station, for placing the electricity
Core；Infrared irradiation station, for being irradiated using infrared light to battery core；Photograph taking station, for acquiring by infrared
The image of the battery core of light irradiation, to obtain infrared radiation image.
Further, it is based on structure chart shown in Fig. 3, the color of the battery core is dark color.
Further, it is based on structure chart shown in Fig. 3, the color of the battery core is black.
Further, it is based on structure chart shown in Fig. 3, the battery core is the battery core of soft surface.
Further, it is based on structure chart shown in Fig. 3, the defect is leakage metal defect.
Further, the structure chart of another embodiment as shown in Figure 4 further comprises: blowing station is used for
Before the infrared light is irradiated battery core, dedusting is blowed to the battery core.
Further, battery core when dedusting is blowed completes that battery core after dust-removing moves away or battery core is completed
Hair dryer moves away after dust-removing.
Further, the first of direction and the battery core surface that dedusting includes: blowing is blowed to the battery core
Angle is less than 90 degree.
Further, first angle is 10-60 degree.
Further, using infrared light to by dust-removing battery core be irradiated include: Infrared irradiation side
To the second angle with the battery core surface less than 90 degree.
Further, wherein second angle is 10-60 degree.
Further, wherein the light source of the infrared light is area source.
Further, wherein the light source of the infrared light is multiple.
Further, wherein the light source of the infrared light is 4, is separately positioned on the four direction of the battery core.
Further, wherein image of the acquisition by the battery core of Infrared irradiation includes: to be in the surface of the battery core
90 degree of direction acquires the image of the battery core.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between parentheses should not be configured to limitations on claims.
Claims (10)
1. a kind of method for detecting battery core surface defect, comprising:
Second step (S2) is irradiated battery core using infrared light；
Third step (S3), image of the acquisition by the battery core of Infrared irradiation, to obtain infrared radiation image；
Four steps (S4) determines the surface defect of the battery core according to the infrared radiation image.
2. according to the method described in claim 1, wherein, the color of the battery core is dark color.
3. according to the method described in claim 1, wherein, the color of the battery core is black.
4. according to the method described in claim 1, wherein, the battery core is the battery core of soft surface.
5. according to the method described in claim 1, wherein, the defect is leakage metal defect.
6. according to the method described in claim 1, further comprising: first step (S1), before the second step (S2),
Dedusting is blowed to the battery core.
7. according to the method described in claim 6, battery core moves away after battery core when dedusting is blowed completes dust-removing
Or hair dryer moves away after battery core completion dust-removing.
8. according to the method described in claim 7, wherein, the direction and institute that dedusting includes: blowing is blowed to the battery core
First angle on battery core surface is stated less than 90 degree.
9. according to the method described in claim 8, wherein, first angle is 10-60 degree.
10. a kind of device for detecting battery core surface defect, comprising:
Detection station, for placing the battery core；
Infrared irradiation station, for being irradiated using infrared light to battery core；
Photograph taking station, for acquiring the image for passing through the battery core of Infrared irradiation, to obtain infrared radiation image.
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