CN108918309A - The solder joint detection method and solder joint detection device of galvanized steel plain sheet - Google Patents
The solder joint detection method and solder joint detection device of galvanized steel plain sheet Download PDFInfo
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- CN108918309A CN108918309A CN201810965307.3A CN201810965307A CN108918309A CN 108918309 A CN108918309 A CN 108918309A CN 201810965307 A CN201810965307 A CN 201810965307A CN 108918309 A CN108918309 A CN 108918309A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
- G01N2203/008—Residual indentation measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0296—Welds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
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Abstract
The invention discloses a kind of solder joint detection method of galvanized steel plain sheet and solder joint detection devices, are related to welding quality assessment technology field.The solder joint detection method of the galvanized steel plain sheet includes：Impression rate is obtained according to the thickness for detecting obtained electrode total displacement amount and material to be welded, judge the impression rate and generates the first quality of welding spot qualification information, the weld point image obtained according to ring region weighting coefficient and detection obtains weight ratio, judge the weight ratio and generates the second quality of welding spot qualification information, the splashing trace and the weld point image obtained according to detection obtains splashing ratio, judge the splashing ratio and generates third quality of welding spot qualification information, according to the first quality of welding spot qualification information, the second quality of welding spot qualification information and the third quality of welding spot qualification information simultaneously generate quality of welding spot qualification information.The solder joint detection method and solder joint detection device of the galvanized steel plain sheet being capable of the various non-destructive testings of butt welding point progress, detection efficiency height and accuracy and reliability height.
Description
Technical field
The present invention relates to welding quality assessment technology fields, in particular to a kind of solder joint detection side of galvanized steel plain sheet
Method and solder joint detection device.
Background technique
Galvanized steel plain sheet in the manufacturing industry such as automobile due to receiving and using more and more widely with preferable corrosion resistance.
In the use of galvanized steel plain sheet, need to connect construction of multiple galvanized steel plain sheets to form needs, example by spot welding
Such as, in body of a motor car manufacturing process, resistance spot welding is essential connection moulding process, according to statistics on a body of a motor car
With 3000-6000 solder joint, and the quality of solder joint determines the quality of vehicle body substantially, thus the detection of quality of welding spot seem to
It closes important.The mostly destructiveness detection or half destructiveness of the solder joint detection method of traditional galvanized steel plain sheet detects, such as percussion etc., only
It is suitable for sampling Detection, inefficiency and weldment can be destroyed, is not appropriate for the online test method as point quality.
In view of this, R & D design go out a kind of galvanized steel plain sheet for being able to solve above-mentioned technical problem solder joint detection method and
Solder joint detection device is particularly important.
Summary of the invention
The purpose of the present invention is to provide a kind of solder joint detection method of galvanized steel plain sheet, the solder joint detection sides of the galvanized steel plain sheet
Method can butt welding point carry out various non-destructive testings, detection efficiency is high, and the accuracy and reliability detected is high.
Another object of the present invention is to provide a kind of solder joint detection device, which being capable of butt welding point progress
Various non-destructive testings, detection efficiency is high, and the accuracy and reliability detected is high.
The present invention provides a kind of technical solution：
In a first aspect, the embodiment of the invention provides a kind of solder joint detection methods of galvanized steel plain sheet, including：
Impression rate is obtained according to the thickness for detecting obtained electrode total displacement amount and material to be welded, wherein the electrode is total
Displacement characterizes spot-wedling electrode and is carrying out the spot-wedling electrode indentation in pre-compaction process and pinpoint welding procedure to the material to be welded
The depth of the material to be welded；
Judge the impression rate, and generates the first quality of welding spot qualification information；
The weld point image obtained according to ring region weighting coefficient and detection obtains weight ratio, wherein ring region weighting system
Number characterizes the correlation degree of the area of the corresponding weld point image and the quality of solder joint；
Judge the weight ratio, and generates the second quality of welding spot qualification information；
The splashing trace and the weld point image obtained according to detection obtains splashing ratio；
Judge the splashing ratio, and generates third quality of welding spot qualification information；
According to the first quality of welding spot qualification information, the second quality of welding spot qualification information and the third solder joint matter
It measures qualified information and generates quality of welding spot qualification information.
With reference to first aspect, in the first implementation of first aspect, the judgement impression rate, and generate institute
The step of stating the first quality of welding spot qualification information include：
The impression rate is judged whether less than the first default upper threshold value and greater than the first default lower threshold value, when the impression rate
Less than the described first default upper threshold value and it is greater than the described first default lower threshold value, generates the first quality of welding spot qualification information；
When generating the first quality of welding spot qualification information, continue to execute according to ring region weighting coefficient and the solder joint figure
As the step of obtaining weight ratio.
With reference to first aspect and its above-mentioned implementation, in second of implementation of first aspect, the judgement institute
Weight ratio is stated, and the step of generating the second quality of welding spot qualification information includes：
Judge whether the weight ratio is greater than second threshold, when the weight ratio is greater than the second threshold, generation
The second quality of welding spot qualification information；
When generating the second quality of welding spot qualification information, continue to execute according to the splashing trace and the solder joint figure
As the step of obtaining the splashing ratio.
With reference to first aspect and its above-mentioned implementation, in the third implementation of first aspect, the judgement institute
Splashing ratio is stated, and the step of generating the third quality of welding spot qualification information includes：
Judge whether the splashing ratio is less than third threshold value, when the splashing ratio is less than the third threshold value, generation
The third quality of welding spot qualification information；
When generating third quality of welding spot qualification information, continue to execute according to the first quality of welding spot qualification information, institute
State the step of quality of welding spot qualification information described in the second quality of welding spot qualification information and the third quality of welding spot qualification Infomiation Production
Suddenly.
With reference to first aspect and its above-mentioned implementation, in the 4th kind of implementation of first aspect, according to the electricity
The thickness of pole total displacement amount and the material to be welded show that the impression rate step includes：
It measures and obtains precompressed electrode displacement amount of the spot-wedling electrode in the pre-compaction process to the material to be welded；
It measures and obtains spot-wedling electrode displacement of the spot-wedling electrode in the pinpoint welding procedure to the material to be welded；
It sums to the spot-wedling electrode displacement and the precompressed electrode displacement amount and obtains the electrode total displacement amount；
Thickness according to the electrode total displacement amount and the material to be welded obtains impression rate, wherein calculation formula is：
C=(d1+d2)/(2*H)
Wherein, d1 characterizes the precompressed electrode displacement amount, and d2 characterizes the spot-wedling electrode displacement, and H characterization is described to be welded
The thickness of material, C characterize the impression rate.
With reference to first aspect and its above-mentioned implementation, described according to ring in the 5th kind of implementation of first aspect
The step of area's weighting coefficient and the weld point image obtain weight ratio include：
It acquires and obtains weld point image；
The weld point image is pre-processed, and obtains total characteristic ring region；
Dividing the total characteristic ring region according to grey scale pixel value is three ring regions, and is followed successively by first outward by solder joint center
Feature ring region, second feature ring region and third feature ring region；
According to pixel method calculate separately the total characteristic ring region, the fisrt feature ring region, the second feature ring region and
The area of the third feature ring region；
According to the total characteristic ring region, the fisrt feature ring region, the second feature ring region, the third feature ring region
Area and the ring region weighting coefficient ring region weighted area is calculated, wherein the ring region weighting coefficient includes total characteristic
Ring region weighting coefficient, fisrt feature ring region weighting coefficient, second feature ring region weighting coefficient and third feature ring region weighting coefficient,
Wherein, calculation formula is：
S=k1*S1+k2*S2+k3*S+k0*S0
Wherein, S1 characterizes the area of the fisrt feature ring region, and S2 characterizes the area of the second feature ring region, S3 characterization
The area of the third feature ring region, S0 characterize the area of the total characteristic ring region, and the area of the total characteristic ring region is described
Fisrt feature ring region, the second feature ring region and the third feature ring region area and, k1 characterization fisrt feature ring region add
Weight coefficient, k2 characterize second feature ring region weighting coefficient, and k3 characterizes third feature ring region weighting coefficient, and k0 characterizes total characteristic ring region
Weighting coefficient, S characterize the ring region weighted area；
Areal calculation according to the ring region weighted area and the total characteristic ring region obtains the weight ratio, wherein
Calculation formula is as follows：
K4=S/S0
Wherein, K4 characterizes the weight ratio.
With reference to first aspect and its above-mentioned implementation, in the 6th kind of implementation of first aspect, according to described total
Feature ring region, the fisrt feature ring region, the second feature ring region, the area of the third feature ring region and the ring region add
Weight coefficient was calculated before the step of ring region weighted area：
It is special that the total characteristic ring region, the fisrt feature ring region, the second feature ring region and the third are measured respectively
Levy the respective ring region area sequence x (n) of ring region, and solder joint parameter sequence corresponding with the respective ring region area sequence x (n)
It arranges y (n), wherein the auto-correlation coefficient of each ring region area sequence x (n) is ρ x=1, each solder joint argument sequence y
(n) auto-correlation coefficient is ρ y=1；
Respectively according to the corresponding solder joint ginseng of the ring region area sequence x (n) and the ring region area sequence x (n)
The total characteristic ring region weighting coefficient, the fisrt feature ring region weighting coefficient, second spy is calculated in Number Sequence y (n)
Levy ring region weighting coefficient and the third feature ring region weighting coefficient；
Wherein calculation formula is：
Wherein k characterizes the total characteristic ring region weighting coefficient, the fisrt feature ring region weighting coefficient, the second feature
Ring region weighting coefficient or the third feature ring region weighting coefficient.
With reference to first aspect and its above-mentioned implementation, described according to inspection in the 7th kind of implementation of first aspect
The step of splashing trace and the weld point image measured obtains splashing ratio include：
Splashing trace is obtained according to the weld point image；
The area of the splashing trace is calculated according to pixel method；
The splashing ratio is obtained according to the area of the splashing trace and the areal calculation of the total characteristic ring region；Wherein
Calculation formula is：
K5=Sf/S0
Wherein, K5 characterizes the splashing ratio, and Sf characterizes the area of the splashing trace.
Second aspect, the embodiment of the invention provides a kind of solder joint detection devices, including：
Memory, for storing one or more programs；
Processor；
When one or more of programs are executed by the processor, the solder joint detection side of the galvanized steel plain sheet is realized
Method.
In conjunction with second aspect, in the first implementation of second aspect, the solder joint detection device further includes image
Sensor and displacement sensor, the processor respectively with described image sensor and institute's displacement sensors communication connection；
The electrode total displacement amount detected by institute's displacement sensors；
The processor obtains impression rate according to the thickness of the electrode total displacement amount and the material to be welded；
Weld point image is acquired by described image sensor；
The processor obtains total characteristic ring region according to the weld point image；
The processor obtains weight ratio according to ring region weighting coefficient and the total characteristic ring region；
The processor obtains the splashing trace according to the weld point image；
The processor obtains the area of the splashing trace according to the splashing trace；
The processor obtains the splashing ratio according to the area of the splashing trace and the area of the total characteristic ring region
Example；
The processor judges the impression rate, the weight ratio and the splashing ratio, and generates quality of welding spot conjunction
Lattice information.
Compared with prior art, the solder joint detection method of galvanized steel plain sheet provided in an embodiment of the present invention and solder joint detection device
Beneficial effect is：
Impression rate is obtained according to the thickness for detecting obtained electrode total displacement amount and material to be welded, then judges impression rate, and
Generate the first quality of welding spot qualification information.The weld point image obtained according to ring region weighting coefficient and detection obtains weight ratio, into
One step judges weight ratio, and generates the second quality of welding spot qualification information；The splashing trace and weld point image obtained according to detection
Obtain splashing ratio；Further judge splashing ratio, and generates third quality of welding spot qualification information；It is closed according to the first quality of welding spot
Lattice information, the second quality of welding spot qualification information and third quality of welding spot qualification information simultaneously generate quality of welding spot qualification information,
It is welded after to three up-to-standard information to get to the first quality of welding spot qualification information, the second quality of welding spot qualification information and third
After point mass qualification information, quality of welding spot qualification information is produced, and then judge the up-to-standard of solder joint, due in detection process
The middle non-destructive testing for having used three impression rate, weight ratio and splashing ratio parameters, so the solder joint of the galvanized steel plain sheet detects
Method can butt welding point carry out various non-destructive testings, detection efficiency with higher, and the accuracy and reliability detected
It is high.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range.It for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of a kind of schematic diagram of solder joint detection device provided by the embodiment of the present invention.
Fig. 2 is a kind of a kind of schematic flow chart of solder joint detection device provided by the embodiment of the present invention.
Fig. 3 is a kind of schematic flow chart of the sub-step of step S100 in Fig. 2.
Fig. 4 is a kind of schematic flow chart of the sub-step of step S200 in Fig. 2.
Fig. 5 is a kind of schematic flow chart of the sub-step of step S300 in Fig. 2.
Fig. 6 is a kind of schematic flow chart of the sub-step of step S400 in Fig. 2.
Fig. 7 is a kind of schematic flow chart of the sub-step of step S500 in Fig. 2.
Fig. 8 is a kind of schematic flow chart of the sub-step of step S600 in Fig. 2.
Icon：70- solder joint detection device；710- memory；720- processor；730- storage control；740- peripheral hardware connects
Mouthful；750- radio frequency unit；760- communication bus/signal wire；770- displacement sensor；780- imaging sensor.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Term " on ", "lower",
The orientation or positional relationship of the instructions such as "inner", "outside", "left", "right" be based on the orientation or positional relationship shown in the drawings, or
The invention product using when the orientation or positional relationship usually the put or orientation that usually understands of those skilled in the art
Or positional relationship, it is merely for convenience of description of the present invention and simplification of the description, rather than the equipment or element of indication or suggestion meaning
It must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.Term
" first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.Term " includes ", " packet
Containing " or any other variant thereof is intended to cover non-exclusive inclusion, so that including the process of a series of elements, side
Method, article or equipment not only include those elements, but also including other elements that are not explicitly listed, or further include
For elements inherent to such a process, method, article, or device.In the absence of more restrictions, by sentence " including one
It is a ... " limit element, it is not excluded that there is also in addition in the process, method, article or apparatus that includes the element
Identical element.
It should also be noted that, unless otherwise clearly defined and limited, the terms such as " setting ", " connection " should do broad sense reason
Solution, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection,
It is also possible to be electrically connected；It can be and be directly connected to, can also be indirectly connected with by intermediary, be can be inside two elements
Connection.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood as the case may be
Body meaning.
Currently, needing to connect structure of multiple galvanized steel plain sheets to form needs by spot welding in the use of galvanized steel plain sheet
It makes, for example, resistance spot welding is essential connection moulding process, according to statistics an automobile in body of a motor car manufacturing process
There is 3000-6000 solder joint on vehicle body, and the quality of solder joint determines the quality of vehicle body, therefore the detection of quality of welding spot substantially
Seem most important.The solder joint detection method of traditional galvanized steel plain sheet is mostly destructive detection or half destructive detection, such as is struck
It hits, is suitable only for sampling Detection, inefficiency and weldment can be destroyed, be not appropriate for the on-line checking side as point quality
Method.
The embodiment of the present invention provides the solder joint detection method and solder joint detection device of a kind of galvanized steel plain sheet, solder joint detection device
Quality testing, and the solder joint detection method of the galvanized steel plain sheet are carried out using the solder joint detection method butt welding point of above-mentioned galvanized steel plain sheet
Can butt welding point carry out various non-destructive testings, improve detection efficiency, and the accuracy and reliability detected is high.
With reference to the accompanying drawing, detailed description of the preferred embodiments.
Embodiment：
Referring to Fig. 1, Fig. 1 is a kind of a kind of schematic structure of solder joint detection device 70 provided by the embodiment of the present invention
Figure.
It is smart phone, PC (personal that the solder joint detection device 70, which may be, but not limited to,
Computer, PC), tablet computer, personal digital assistant (personal digital assistant, PDA), wearable movement
Terminal etc., the solder joint detection device 70 include memory 710, storage control 730, and one or more (is only shown in figure
One) processor 720, radio frequency unit 750 and Peripheral Interface 740 etc..These components pass through one or more communication bus/signal
Line 760 mutually communicates.
Memory 710 can be used for storing software program and mould group, the dress of the point cloud registering as provided by the embodiment of the present invention
Corresponding program instruction/mould group is set, processor 720 passes through the software program and mould group that operation is stored in memory 710, from
And application and data processing are performed various functions, the point cloud registration method as provided by the embodiment of the present invention.
Wherein, the memory 710 may be, but not limited to, (the Random Access of random access memory 710
Memory, RAM), read-only memory 710 (Read Only Memory, ROM), programmable read only memory 710
(Programmable Read-Only Memory, PROM), 710 (Erasable of erasable read-only memory
Programmable Read-Only Memory, EPROM), (the Electric Erasable of electricallyerasable ROM (EEROM) 710
Programmable Read-Only Memory, EEPROM) etc..
Processor 720 can be a kind of IC chip, have signal handling capacity.Above-mentioned processor 720 can be with
It is general processor 720, including central processing unit 720 (Central Processing Unit, CPU), network processing unit 720
(Network Processor, NP), speech processor 720 and video processor 720 etc.；It can also be Digital Signal Processing
Device 720, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor are patrolled
Collect device, discrete hardware components.It may be implemented or execute disclosed each method, step and the logical box in the embodiment of the present invention
Figure.General processor 720 can be microprocessor 720 or the processor 720 is also possible to any conventional processor 720
Deng.
Various input/output devices are couple processor 720 and memory 710 by Peripheral Interface 740.In some implementations
In example, Peripheral Interface 740, processor 720 and storage control 730 can be realized in one single chip.The present invention other
Some embodiments in, they can also be realized by independent chip respectively.
Radio frequency unit 750 is used to receive and transmit electromagnetic wave, realizes the mutual conversion of electromagnetic wave and electric signal, thus with
Communication network or other equipment are communicated.
It is appreciated that structure shown in FIG. 1 is only to illustrate, solder joint detection device 70 include it is more than shown in Fig. 1 or
Less component, or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can using hardware, software or its
Combination is realized.
Please continue to refer to Fig. 1, solder joint detection device 70 can also include imaging sensor 780 and displacement sensor 770, place
Manage device 720 respectively with 770 communication connection of imaging sensor 780 and displacement sensor, it is to be understood that processor 720 can be with
External interface and communication bus/signal wire 760 is passed sequentially through to connect with imaging sensor 780 and the communication of displacement sensor 770 respectively
It connects；
Obtained electrode total displacement amount is detected by displacement sensor 770；720 receiving electrode total displacement amount of processor, and
Thickness according to electrode total displacement amount and material to be welded obtains impression rate；
Weld point image is acquired by imaging sensor 780, it is to be appreciated that the weld point image may be that will pass through
The pretreated weld point image comprising at solder joint ring region, is also possible to comprising the splashing trace near solder joint ring region and solder joint ring region
Large range of image；Processor 720 receives weld point image and obtains total characteristic ring region according to weld point image；Processor 720
Weight ratio is obtained according to ring region weighting coefficient and total characteristic ring region again；
Processor 720 obtains splashing trace according to weld point image；Processor 720 obtains splashing trace according to splashing trace
Area；Processor 720 obtains splashing ratio according to the area of splashing trace and the area of total characteristic ring region；
Finally, processor 720 judges impression rate, weight ratio and splashing ratio, and generate quality of welding spot qualification information.It is complete
Detected at quality of welding spot, due to used in the detection process impression rate, three parameters of weight ratio and splashing ratio it is lossless
Detection, thus the solder joint detection device 70 can butt welding point carry out various non-destructive testings, detection efficiency with higher, and
The accuracy and reliability of detection is high.
By the working principle for the solder joint detection method for specifically introducing galvanized steel plain sheet provided in an embodiment of the present invention and have below
Beneficial effect.
Referring to Fig. 2, Fig. 2 is a kind of a kind of schematic flow of solder joint detection device 70 provided by the embodiment of the present invention
Figure.The solder joint detection method of the galvanized steel plain sheet, includes the following steps：
Step S100：Impression rate is obtained according to the thickness for detecting obtained electrode total displacement amount and material to be welded；Wherein, electric
Total displacement scale in pole levies spot-wedling electrode to treat the spot-wedling electrode indentation that wlding material carries out in pre-compaction process and pinpoint welding procedure to be welded
The depth of material.
Step S200：Judge impression rate, and generates the first quality of welding spot qualification information.
When carrying out spot welding operation, spot-wedling electrode to the opposite two sides for being depressed into material to be welded in advance, spot-wedling electrode again to
Wlding material feed, to form reaction nugget on material to be welded, i.e. solder joint, due in precompressed and pinpoint welding procedure, spot-wedling electrode
Wlding material will be treated and apply certain pressure, and formed react nugget when material to be welded soften because of high temperature, so spot welding is electric
Pole will leave impression on material to be welded, and the depth of impression and quality of welding spot have close relationship, such as：
When the depth of impression is too small, illustrate that the welding heat generated in the welding process is too small, spot-wedling electrode with to wlding
Expect that the metal molten of contact position is insufficient, only less molten metal elapses around under spot-wedling electrode effect, and reaction is molten
Core does not form or forms deficiency, and the bonding strength of solder joint is not high, and fracture mode is often faying face fracture；
And the depth of impression it is excessive when, it will influence that pad surface is beautiful and smoothness, reduce cross dimensions, cause stress
It concentrates, so that the bonding strength of solder joint declines.
So the impression rate obtained by the thickness of electrode total displacement amount and material to be welded is judged, to generate the first quality of welding spot
Qualified information directly reflects the quality condition of solder joint, which is the method for non-destructive testing, electrode displacement sensor 770
It can be directly mounted at spot-wedling electrode, detection process will not influence quality of welding spot.
Step S300：The weld point image obtained according to ring region weighting coefficient and detection obtains weight ratio；Wherein, ring region adds
Weight coefficient characterizes the correlation degree of the area of corresponding weld point image and the quality of solder joint.
Step S400：Judge weight ratio, and generates the second quality of welding spot qualification information；
Due to reacting temperature change and pressure change of nugget etc. for the table of direct reaction to solder joint in solder joint forming process
In face color, so the color of solder joint and the difference of the corresponding area of color region can be used for characterizing solder joint in different spot welding
Difference under journey and process conditions variation, will directly react quality of welding spot, and the movements such as acquisition of weld point image can't shadow
Ring quality of welding spot, and few the time required to acquiring weld point image, thus the step can butt welding point carry out quick, lossless inspection
It surveys.
Step S500：The splashing trace and weld point image obtained according to detection obtains splashing ratio；
Step S600：Judge splashing ratio, and generates third quality of welding spot qualification information；
In pinpoint welding procedure, continue to feed after forming minimal reaction nugget, it will be so that reaction nugget and plastic area be continuous
It extends to the outside, when the expansion rate for reacting nugget is greater than the expansion rate of plastic area, the liquid metal of fusing will be to be welded
Material flies out to form splashing, and during splashing, the fused solution metal of splashing will leave a little sputter around solder joint
The drop come, the drop of melting gradually solidify and are formed around solder joint the splashing trace of grey black, and the degree of splashing is bigger, meeting
Bigger splashing trace is left around solder joint.The splashing ratio obtained by splashing trace and weld point image can substantially judge to fly
The case where splashing, and then react the quality of solder joint.And in the deterministic process of splashing ratio, the acquisition movement of weld point image is fast, and not
Will affect quality of welding spot, thus the step can butt welding point carry out quick, lossless detection.
Step S700：According to the first quality of welding spot qualification information, the second quality of welding spot qualification information and third quality of welding spot
Qualified information simultaneously generates quality of welding spot qualification information.
To get qualified to the first quality of welding spot qualification information, the second quality of welding spot after obtaining three up-to-standard information
After information and third quality of welding spot qualification information, quality of welding spot qualification information is produced, and then judge the up-to-standard of solder joint, by
In the non-destructive testing for having used three impression rate, weight ratio and splashing ratio parameters in the detection process, so the galvanized steel
The solder joint detection method of plate can butt welding point carry out various non-destructive testings, detection efficiency with higher, and the standard detected
True property and high reliablity.
Referring to Fig. 3, Fig. 3 is a kind of schematic flow chart of the sub-step of step S100 in Fig. 2.In the embodiment of the present invention
In, step S100 can also include following sub-step：
Sub-step S101：It measures and obtains precompressed electrode displacement of the spot-wedling electrode in the pre-compaction process for treating wlding material
Amount；
Sub-step S102：It measures and obtains spot-wedling electrode displacement of the spot-wedling electrode in the pinpoint welding procedure for treating wlding material
Amount；
Sub-step S103：It sums to spot-wedling electrode displacement and precompressed electrode displacement amount and obtains electrode total displacement amount；Electricity
The moving distance of spot-wedling electrode of the total displacement amount in pole based on the pre-compaction process in pinpoint welding procedure and during forming reaction nugget,
The depth profile of impression can be more comprehensively reacted,
Sub-step S104：Thickness according to electrode total displacement amount and material to be welded obtains impression rate, wherein calculation formula
For：
C=(d1+d2)/(2*H)
Wherein, d1 characterizes precompressed electrode displacement amount, and d2 characterizes spot-wedling electrode displacement, and H characterizes the thickness of material to be welded, C
Characterize impression rate.
For carrying out spot welding to the DP600+Z galvanized steel plain sheet with a thickness of 1.4mm, displacement sensing is utilized in pinpoint welding procedure
Device 770 detects the displacement d1=0.02mm of electrode and displacement d2=during forming reaction nugget in pre-compaction process
0.106mm, then impression rate C=(d1+d2)/(2*H)=4.5%.
Referring to Fig. 4, Fig. 4 is a kind of schematic flow chart of the sub-step of step S200 in Fig. 2.In the embodiment of the present invention
In, step S200 can also include following sub-step：
Sub-step S201：Judge impression rate whether less than the first default upper threshold value and be greater than the first default lower threshold value,
Sub-step S202：When impression rate less than the first default upper threshold value and is greater than the first default lower threshold value, generation first is welded
Point mass qualification information.
Due to when the depth of impression is too small or the depth of impression is excessive, meaning in solder joint forming process occur
Welding heat is too small, metal molten is insufficient at solder joint, reaction nugget does not form or form deficiency, the bonding strength of solder joint
It is not high and the problems such as cause stress to concentrate, thus need be to judge actually detected impression rate using the range for presetting impression rate
No qualification, and the first default upper threshold value is 15% in the embodiment of the present invention, the first default lower threshold value is 5%.
Or by taking the above-mentioned DP600+Z Spot Welding of Galvanized Steels process with a thickness of 1.4mm as an example, impression rate C=(d1+
D2)/(2*H)=4.5% does not generate the first quality of welding spot qualification information then less than the first default lower threshold value, which is not conform to
Lattice.
And after executing sub-step S202, step S300 is executed, that is to say, that when the first quality of welding spot qualification information of generation
When, continue to execute step S300.
Step S300 is just only carried out after generating the first quality of welding spot qualification information, that is to say, that unqualified in quality of welding spot
In the case where without later the step of, save detection time.
Referring to Fig. 5, Fig. 5 is a kind of schematic flow chart of the sub-step of step S300 in Fig. 2.In the embodiment of the present invention
In, step S300 can also include following sub-step：
Sub-step S307：It acquires and obtains weld point image；
Sub-step S308：Weld point image is pre-processed, and obtains total characteristic ring region；Convenient for subsequent singulation, wherein pretreatment packet
It includes butt welding point image and successively carries out format conversion, gray proces, equalization processing, linear filtering and edge detection, and then obtain
Total characteristic ring region.
Sub-step S309：It is three ring regions according to grey scale pixel value segmentation total characteristic ring region；And by solder joint center outward according to
Secondary is fisrt feature ring region, second feature ring region and third feature ring region；For example, the threshold value T1 set is as 50, threshold value T2
150.By the image of total characteristic ring region by two Threshold segmentations at three parts, region of the grey scale pixel value less than T1 is first
Feature ring region, it is third feature ring region that grey scale pixel value, which is greater than region of the T1 less than T2, and region of the grey scale pixel value greater than T2 is
Second feature ring region.
Sub-step S310：Total characteristic ring region, fisrt feature ring region, second feature ring region and the are calculated separately according to pixel method
The area of three feature ring regions；
The sub-step of above-mentioned S308-S310 is that above-mentioned processor foundation weld point image obtains the process of total characteristic ring region.Its
In, surface can be divided into multiple ring regions at the solder joint of zinc steel plate, carry out fine evaluation convenient for corresponding to parameter to ring region, improve zinc-plated
The accuracy of the solder joint detection method of steel plate is located at the central area of pad surface for fisrt feature ring region, is solder joint electricity
Pole directly contacts material to be welded in the welding process and is formed, shape be approximately it is round, in pinpoint welding procedure, fisrt feature ring
The temperature highest in area, the heat that when welding generates will be such that material coating to be welded melts and be squeezed away by electrode, and substrate is caused to expose
Come, and for above-mentioned DP600+Z galvanized steel plain sheet, since the fusing point of zinc is lower, the heat that when welding generates is easier to make zinc
Layer is melted and is squeezed away by electrode, and substrate is caused to expose, so, for fisrt feature ring region, area directly reflects weldering
Whether the temperature conditions of termination process, and time when welding are suitable etc..
For second feature ring region, on the outside of fisrt feature ring region, its cross section contour and the impression at solder joint
Depth and the cap end surface shape of spot-wedling electrode have much relations, are spherical shape in spot-wedling electrode, and the size of spot welding electrode cap is certain
When, the depth of impression is bigger, and the arc wheel profile curvature of second feature ring region is bigger.So for second feature ring region,
The welding that area has further reacted the quality of pinpoint welding procedure relevant to the depth of impression and fisrt feature ring region is reflected
Situations such as.
It is the heat affected area of solder joint outer, the coated metal of this part is after heated by portion for third feature ring region
Point be oxidized, generate corresponding oxide, for above-mentioned DP600+Z galvanized steel plain sheet, the part metals of coating by
It is partially oxidized after heat, generates zinc oxide.So area further reacts during spot welding for third feature ring region
Situations such as spot welding time and temperature.
In addition, the sub-step of step S300 further includes：
Sub-step S311：Face according to total characteristic ring region, fisrt feature ring region, second feature ring region, third feature ring region
Ring region weighted area is calculated in long-pending and ring region weighting coefficient；
Wherein, ring region weighting coefficient includes total characteristic ring region weighting coefficient, fisrt feature ring region weighting coefficient, second feature
Ring region weighting coefficient and third feature ring region weighting coefficient,
Wherein, calculation formula is：
S=k1*S1+k2*S2+k3*S3+k0*S0
Wherein, S1 characterizes the area of fisrt feature ring region, and S2 characterizes the area of second feature ring region, and S3 characterizes third feature
The area of ring region, S0 characterize the area of total characteristic ring region, and the area of total characteristic ring region is fisrt feature ring region, second feature ring region
And the area of third feature ring region and, k1 characterize fisrt feature ring region weighting coefficient, k2 characterize second feature ring region weighting coefficient,
K3 characterizes third feature ring region weighting coefficient, and k0 characterizes total characteristic ring region weighting coefficient, and S characterizes ring region weighted area.
Sub-step S312：Areal calculation according to ring region weighted area and total characteristic ring region obtains weight ratio.
Wherein, calculation formula is as follows：
K4=S/S0
Wherein, K4 characterizes weight ratio.
Due to fisrt feature ring region, second feature ring region and third feature ring region and three feature ring regions and for,
They respectively correspond situation or different from the parameter dependency number in welding process different in welding process, so using using
Corresponding weighting coefficient, more correctly to react the quality of solder joint.
For example, in k1=0.935, k2=0.863, k3=0.942 when k0=0.966, and calculate the first special of solder joint
The area for levying ring region, second feature ring region and third feature ring region is S1=21.24mm2, S2=26.54mm2, S3=
30.76mm2When, then total characteristic ring region is S0=78.54mm2, therefore ring region weighted area is S=k1S1+k2S2+k3S3+k0S0
=147.61mm2, then, and weight ratio K4=S/S0=1.88.
It is understood that can also include before step S302：
Sub-step S301：Total characteristic ring region, fisrt feature ring region, second feature ring region and third feature ring region are measured respectively
Respective ring region area sequence x (n), and solder joint argument sequence y (n) corresponding with respective ring region area sequence x (n).It needs
It is noted that above-mentioned solder joint argument sequence can be the sequence etc. of the drawing shearing load at solder joint.
Wherein, the auto-correlation coefficient of each ring region area sequence x (n) be ρ x=1, each solder joint argument sequence y (n) from
Related coefficient is ρ y=1；
Sub-step S302：Respectively according to ring region area sequence x (n) and the corresponding solder joint parameter of ring region area sequence x (n)
Total characteristic ring region weighting coefficient, fisrt feature ring region weighting coefficient, second feature ring region weighting coefficient is calculated in sequences y (n)
And third feature ring region weighting coefficient.
Wherein calculation formula is：
Wherein k characterizes total characteristic ring region weighting coefficient, fisrt feature ring region weighting coefficient, second feature ring region weighting coefficient
Or third feature ring region weighting coefficient.
Sub-step S302 can be improved the accuracy of the solder joint detection method of galvanized steel plain sheet, wait for especially for volume procurement
For wlding material, multiple groups welded sample is acquired respectively, measures the total characteristic ring region, fisrt feature ring region, the second spy of welded sample
Ring region and the respective ring region area sequence x (n) of third feature ring region are levied, and corresponding with respective ring region area sequence x (n)
Solder joint argument sequence y (n) to reflect the weighting coefficient of the response of volume procurement material to be welded, and then more accurately passes through plating
The solder joint detection method Reaction Welding quality of zinc steel plate.
Referring to Fig. 6, Fig. 6 is a kind of schematic flow chart of the sub-step of step S400 in Fig. 2.In the embodiment of the present invention
In, step S400 can also include following sub-step：
Sub-step S401：Judge whether weight ratio is greater than second threshold；
Sub-step S402：When weight ratio is greater than second threshold, the second quality of welding spot qualification information of generation；Wherein, second
Threshold value 1.85.
For example, the total characteristic that previous experiments pass through 30 groups of the detection solder joints to the DP600+Z galvanized steel plain sheet with a thickness of 1.4mm
Ring region, fisrt feature ring region, second feature ring region and the respective ring region area sequence x (n) of third feature ring region, and with it is respective
The corresponding solder joint argument sequence y (n) of ring region area sequence x (n), wherein solder joint argument sequence y (n) characterization solder joint tension
Shearing load data sequence, and corresponding weighting coefficient is derived by above-mentioned formula.Obtain k1=0.935, k2=0.863, k3
=0.942, k0=0.966.
It is S1=in the area of the fisrt feature ring region, second feature ring region and the third feature ring region that calculate solder joint
21.24mm2, S2=26.54mm2, S3=30.76mm2, then total characteristic ring region is S0=78.54mm2, therefore ring region weights face
Product is S=k1S1+k2S2+k3S+k0S0=147.61mm2Greater than 1.85*S0=145.299mm2, weight ratio K4=S/
S0=1.88, so the weight ratio of the solder joint is qualified.
In addition, the sub-step of step S400 can also include：
And after executing sub-step S402, step S500 is executed, that is to say, that when the second quality of welding spot qualification information of generation
When, continue to execute the step of obtaining splashing ratio according to splashing trace and weld point image.
Step S500 is just only carried out after generating the second quality of welding spot qualification information, that is to say, that unqualified in quality of welding spot
In the case where without later the step of, save detection time.
Referring to Fig. 7, Fig. 7 is a kind of schematic flow chart of the sub-step of step S500 in Fig. 2.In the embodiment of the present invention
In, step S500 can also include following sub-step：
Sub-step S501：Splashing trace is obtained according to weld point image；
Sub-step S502：The area of splashing trace is calculated according to pixel method；
Sub-step S503：Splashing ratio is obtained according to the area of splashing trace and the areal calculation of total characteristic ring region；Wherein
Calculation formula is：
K5=Sf/S0
Wherein, K5 characterizes splashing ratio, and Sf characterizes the area of splashing trace.
For example, pre-processing to the image around some collected DP600+Z solder joint, the area of splashing trace is obtained
Sf=2.13mm2, and the area S0=78.54mm2 of total characteristic ring region, therefore splashing trace the area ratio D=Sf/S0=
2.71%.
By splashing ratio, to react in pinpoint welding procedure, the liquid metal of fusing flies out to form splashing from material to be welded,
Its degree splashed, and then react the quality of solder joint.And in the deterministic process of splashing ratio, the acquisition movement of weld point image is fast,
And will not influence quality of welding spot, so the step can butt welding point carry out quick, lossless detection.
In addition, referring to Fig. 8, Fig. 8 is a kind of schematic flow chart of the sub-step of step S600 in Fig. 2.In the present invention
In embodiment, step S600 can also include following sub-step：
Sub-step S601：Judge whether splashing ratio is less than third threshold value；
Sub-step S602：When splashing ratio is less than third threshold value, generation third quality of welding spot qualification information；Of the invention real
It applies in example, third threshold value is 10%.
For example, splashing trace the area ratio D=Sf/S0=2.71% ﹤ 10%, so the splashing ratio at the solder joint is qualified.
And after executing sub-step S602, step S700 is executed, that is to say, that when generation third quality of welding spot qualification information
When, according to the first quality of welding spot qualification information, the second quality of welding spot qualification information and the weldering of third quality of welding spot qualification Infomiation Production
Point mass qualification information.That is, being welded after obtaining three up-to-standard information to get to the first quality of welding spot qualification information, second
After point mass qualification information and third quality of welding spot qualification information, quality of welding spot qualification information is produced, and then judge solder joint
It is up-to-standard, due to having used the non-destructive testing of three impression rate, weight ratio and splashing ratio parameters, institute in the detection process
With the solder joint detection method of the galvanized steel plain sheet can butt welding point carry out various non-destructive testings, detection efficiency with higher,
And the accuracy and reliability of detection is high.
The working principle of the solder joint detection method of galvanized steel plain sheet provided in an embodiment of the present invention is：
Impression rate is obtained according to the thickness for detecting obtained electrode total displacement amount and material to be welded, then judges impression rate, and
Generate the first quality of welding spot qualification information.The weld point image obtained according to ring region weighting coefficient and detection obtains weight ratio, into
One step judges weight ratio, and generates the second quality of welding spot qualification information；The splashing trace and weld point image obtained according to detection
Obtain splashing ratio；Further judge splashing ratio, and generates third quality of welding spot qualification information；It is closed according to the first quality of welding spot
Lattice information, the second quality of welding spot qualification information and third quality of welding spot qualification information simultaneously generate quality of welding spot qualification information,
It is welded after to three up-to-standard information to get to the first quality of welding spot qualification information, the second quality of welding spot qualification information and third
After point mass qualification information, quality of welding spot qualification information is produced, and then judge the up-to-standard of solder joint, due in detection process
The middle non-destructive testing for having used three impression rate, weight ratio and splashing ratio parameters, so the solder joint of the galvanized steel plain sheet detects
Method can butt welding point carry out various non-destructive testings, detection efficiency with higher, and the accuracy and reliability detected
It is high.
In summary：
The solder joint detection method of the solder joint detection method of galvanized steel plain sheet provided in an embodiment of the present invention, the galvanized steel plain sheet can
Butt welding point carries out various non-destructive testings, and detection efficiency is high, and the accuracy and reliability detected is high.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, in the absence of conflict, the feature in the above embodiments be can be combined with each other, and the present invention can also have respectively
Kind change and variation.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all wrap
Containing within protection scope of the present invention.Also, it should regard embodiment as exemplary, and be non-limiting, this hair
Bright range is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are included within the present invention.It should not treat any reference in the claims as involved by limitation
And claim.
Claims (10)
1. a kind of solder joint detection method of galvanized steel plain sheet, which is characterized in that including：
Impression rate is obtained according to the thickness for detecting obtained electrode total displacement amount and material to be welded, wherein the electrode total displacement
Scale is levied spot-wedling electrode and is being carried out described in the spot-wedling electrode indentation in pre-compaction process and pinpoint welding procedure to the material to be welded
The depth of material to be welded；
Judge the impression rate, and generates the first quality of welding spot qualification information；
The weld point image obtained according to ring region weighting coefficient and detection obtains weight ratio, wherein the ring region weighting coefficient table
Levy the correlation degree of the area of the corresponding weld point image and the quality of solder joint；
Judge the weight ratio, and generates the second quality of welding spot qualification information；
The splashing trace and the weld point image obtained according to detection obtains splashing ratio；
Judge the splashing ratio, and generates third quality of welding spot qualification information；
It is closed according to the first quality of welding spot qualification information, the second quality of welding spot qualification information and the third quality of welding spot
Lattice information simultaneously generates quality of welding spot qualification information.
2. the solder joint detection method of galvanized steel plain sheet according to claim 1, which is characterized in that the judgement impression
Rate, and the step of generating the first quality of welding spot qualification information includes：
The impression rate is judged whether less than the first default upper threshold value and greater than the first default lower threshold value, when the impression rate is less than
The first default upper threshold value and it is greater than the described first default lower threshold value, generates the first quality of welding spot qualification information；
When generating the first quality of welding spot qualification information, continues to execute and obtained according to ring region weighting coefficient and the weld point image
The step of weight ratio out.
3. the solder joint detection method of galvanized steel plain sheet according to claim 2, which is characterized in that the judgement weighting ratio
Example, and the step of generating the second quality of welding spot qualification information includes：
Judge whether the weight ratio is greater than second threshold, when the weight ratio is greater than the second threshold, described in generation
Second quality of welding spot qualification information；
When generating the second quality of welding spot qualification information, continues to execute and obtained according to the splashing trace and the weld point image
The step of splashing ratio out.
4. the solder joint detection method of galvanized steel plain sheet according to claim 3, which is characterized in that the judgement splashing ratio
Example, and the step of generating the third quality of welding spot qualification information includes：
Judge whether the splashing ratio is less than third threshold value, when the splashing ratio is less than the third threshold value, described in generation
Third quality of welding spot qualification information；
When generating third quality of welding spot qualification information, continue to execute according to the first quality of welding spot qualification information, described
The step of quality of welding spot qualification information described in two quality of welding spot qualification information and the third quality of welding spot qualification Infomiation Production.
5. the solder joint detection method of galvanized steel plain sheet according to claim 1, which is characterized in that according to the electrode total displacement
The thickness of amount and the material to be welded show that the impression rate step includes：
It measures and obtains precompressed electrode displacement amount of the spot-wedling electrode in the pre-compaction process to the material to be welded；
It measures and obtains spot-wedling electrode displacement of the spot-wedling electrode in the pinpoint welding procedure to the material to be welded；
It sums to the spot-wedling electrode displacement and the precompressed electrode displacement amount and obtains the electrode total displacement amount；
Thickness according to the electrode total displacement amount and the material to be welded obtains impression rate, wherein calculation formula is：
C=(d1+d2)/(2*H)
Wherein, d1 characterizes the precompressed electrode displacement amount, and d2 characterizes the spot-wedling electrode displacement, and H characterizes the material to be welded
Thickness, C characterizes the impression rate.
6. the solder joint detection method of galvanized steel plain sheet according to claim 1, which is characterized in that described according to ring region weighting system
Counting the step of obtaining weight ratio with the weld point image includes：
It acquires and obtains weld point image；
The weld point image is pre-processed, and obtains total characteristic ring region；
Dividing the total characteristic ring region according to grey scale pixel value is three ring regions, and is followed successively by fisrt feature outward by solder joint center
Ring region, second feature ring region and third feature ring region；
The total characteristic ring region, the fisrt feature ring region, the second feature ring region and described are calculated separately according to pixel method
The area of third feature ring region；
Face according to the total characteristic ring region, the fisrt feature ring region, the second feature ring region, the third feature ring region
Ring region weighted area is calculated in the long-pending and described ring region weighting coefficient, wherein the ring region weighting coefficient includes total characteristic ring region
Weighting coefficient, fisrt feature ring region weighting coefficient, second feature ring region weighting coefficient and third feature ring region weighting coefficient,
Wherein, calculation formula is：
S=k1*S1+k2*S2+k3*S+k0*S0
Wherein, S1 characterizes the area of the fisrt feature ring region, and S2 characterizes the area of the second feature ring region, described in S3 characterization
The area of third feature ring region, S0 characterize the area of the total characteristic ring region, and the area of the total characteristic ring region is described first
Feature ring region, the second feature ring region and the third feature ring region area and, k1 characterize fisrt feature ring region weighting system
Number, k2 characterize second feature ring region weighting coefficient, and k3 characterizes third feature ring region weighting coefficient, and k0 characterizes the weighting of total characteristic ring region
Coefficient, S characterize the ring region weighted area；
Areal calculation according to the ring region weighted area and the total characteristic ring region obtains the weight ratio, wherein calculates
Formula is as follows：
K4=S/S0
Wherein, K4 characterizes the weight ratio.
7. the solder joint detection method of galvanized steel plain sheet according to claim 6, which is characterized in that according to the total characteristic ring
Area, the fisrt feature ring region, the second feature ring region, the third feature ring region area and the ring region weighting coefficient
Further include before the step of ring region weighted area is calculated：
The total characteristic ring region, the fisrt feature ring region, the second feature ring region and the third feature ring are measured respectively
The respective ring region area sequence x (n) in area, and solder joint argument sequence y corresponding with the respective ring region area sequence x (n)
(n), wherein the auto-correlation coefficient of each ring region area sequence x (n) is ρ x=1, each solder joint argument sequence y (n)
Auto-correlation coefficient be ρ y=1；
Respectively according to the corresponding solder joint parameter sequence of the ring region area sequence x (n) and the ring region area sequence x (n)
The total characteristic ring region weighting coefficient, the fisrt feature ring region weighting coefficient, the second feature ring is calculated in column y (n)
Area's weighting coefficient and the third feature ring region weighting coefficient；
Wherein calculation formula is：
Wherein k characterizes the total characteristic ring region weighting coefficient, the fisrt feature ring region weighting coefficient, the second feature ring region
Weighting coefficient or the third feature ring region weighting coefficient.
8. the solder joint detection method of galvanized steel plain sheet according to claim 6, which is characterized in that the foundation detection obtained
The step of splashing trace and the weld point image obtain splashing ratio include：
Splashing trace is obtained according to the weld point image；
The area of the splashing trace is calculated according to pixel method；
The splashing ratio is obtained according to the area of the splashing trace and the areal calculation of the total characteristic ring region；Wherein calculate
Formula is：
K5=Sf/S0
Wherein, K5 characterizes the splashing ratio, and Sf characterizes the area of the splashing trace.
9. a kind of solder joint detection device, which is characterized in that including：
Memory, for storing one or more programs；
Processor；
When one or more of programs are executed by the processor, such as plating of any of claims 1-8 is realized
The solder joint detection method of zinc steel plate.
10. solder joint detection device according to claim 9, which is characterized in that the solder joint detection device further includes image
Sensor and displacement sensor, the processor respectively with described image sensor and institute's displacement sensors communication connection；
The electrode total displacement amount detected by institute's displacement sensors；
The processor obtains impression rate according to the thickness of the electrode total displacement amount and the material to be welded；
Weld point image is acquired by described image sensor；
The processor obtains total characteristic ring region according to the weld point image；
The processor obtains weight ratio according to ring region weighting coefficient and the total characteristic ring region；
The processor obtains the splashing trace according to the weld point image；
The processor obtains the area of the splashing trace according to the splashing trace；
The processor obtains the splashing ratio according to the area of the splashing trace and the area of the total characteristic ring region；
The processor judges the impression rate, the weight ratio and the splashing ratio, and generates quality of welding spot qualification letter
Breath.
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