CN106932005A - Visible detection method and control device that a kind of mobile terminal is tightened up a screw - Google Patents
Visible detection method and control device that a kind of mobile terminal is tightened up a screw Download PDFInfo
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- CN106932005A CN106932005A CN201511026683.9A CN201511026683A CN106932005A CN 106932005 A CN106932005 A CN 106932005A CN 201511026683 A CN201511026683 A CN 201511026683A CN 106932005 A CN106932005 A CN 106932005A
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- mobile terminal
- screw
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- vision
- positional information
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
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Abstract
The invention discloses visible detection method and control device that a kind of mobile terminal is tightened up a screw, picture picked-up is carried out to mobile terminal to be detected by vision testing machine, analysis is current absorb picture tighten up a screw region gray-level pixels quantity whether in default critical field, if exceeding default critical field, the mobile terminal screw detecting exception is judged；If in the range of preset standard, judging that the mobile terminal screw detecting passes through.With it, cost of labor can be reduced, shorten detection time, at utmost reduce missing inspection and probability of false detection.
Description
Technical field
The present invention relates to a kind of vision detection technology, more particularly to a kind of vision-based detection skill of mobile terminal screw
Art.
Background technology
Vision-based detection is exactly to replace human eye with machine to measure and judge.Vision-based detection refers to by machine vision
Product (i.e. image-pickup device) will be ingested target and be converted into picture signal, send special image procossing to
System, according to the information such as pixel distribution and brightness, color, is transformed into digitized signal；Picture system is to these
Signal carries out various computings to extract clarification of objective, and then is moved come the equipment for controlling scene according to the result for differentiating
Make.It is the valuable mechanism for producing, assembling or pack.It is in detection defect and prevents faulty goods quilt
Being dispensed into the function aspects of consumer has immeasurable value.
Abroad, Machine Vision Detection application popularization.And at home, belong to emerging industry.Future, China
Machine Vision Detection development is mainly shown as following some characteristics：
1st, as industrialized development will be in rising trend to the demand of machine vision
2nd, standardization, integrative solution will be machine vision the only way which must be passed
Current vision testing machine wide market, numerous cell phone manufacturers have to whole hand set vision-based detection to be needed strongly
Ask.But type species is more in itself for mobile phone, Product Process is complicated, imports visual detection equipment and is substantially reading
Bar code this simple functions, such as detect that screw, conductive fabric, plug-in unit also fail to successfully should at present for complex detection
With.
The content of the invention
The present invention solves the technical problem of the visible detection method that a kind of mobile terminal of offer is tightened up a screw
And control device, enabling screw on automatic detection mobile terminal whether normal mounting, improve detection
Speed, reduces flase drop and false dismissal probability.
In order to solve the above-mentioned technical problem, the invention provides the vision-based detection that a kind of mobile terminal is tightened up a screw
Method, comprises the steps of：
Vision testing machine carries out picture picked-up to mobile terminal to be detected, and analysis is currently absorbed on picture
Whether the gray-level pixels quantity in screw region is in default critical field, if exceeding default standard
Scope, then judge the mobile terminal screw detecting exception；If in the range of preset standard, judging should
Mobile terminal screw detecting passes through.
As a further improvement, above-mentioned vision testing machine carries out picture picked-up to mobile terminal to be detected
Before step, also comprise the steps of：
Vision testing machine carries out picture picked-up to the mobile terminal by manual detection in advance, from what is absorbed
A characteristic area is selected in normal pictures, the characteristic information and positional information in this feature region is preserved, and
The positional information in screw region in the normal pictures.
As a further improvement, above-mentioned vision testing machine carries out picture picked-up to mobile terminal to be detected
After step, also comprise the steps of：
According to the characteristic information of the normal pictures for being preserved, it is determined that the current characteristic area absorbed on picture
Positional information, the characteristic area positional information of the normal pictures that will be preserved and the current characteristic area for determining
Location information domain compares, and determines displacement compensation amount, by displacement compensation amount and the screw region position for having preserved
Confidence manner of breathing is superimposed, and obtains currently absorbing picture and tightens up a screw the positional information in region.
As a further improvement, the positional information in features described above region comprises at least transverse axis position, longitudinal axis position
Put and the anglec of rotation；Above-mentioned displacement compensation amount comprises at least transverse axis position difference, longitudinal axis positions difference and rotation
Gyration difference.
As a further improvement, in the step of vision testing machine carries out picture picked-up to mobile terminal,
Mobile terminal is moved to when in the induction range of default sensor in vision testing machine, triggers vision-based detection
Camera on machine carries out picture picked-up to the mobile terminal.
Each implementation method of the present invention also provides a kind of mobile terminal screw vision detection control device, comprising：
Picture picked-up control module, for controlling vision testing machine to carry out picture to mobile terminal to be detected
Intake；
Picture receiver module, for obtaining the picture for currently being absorbed from the vision testing machine；
Gray analysis module, tightens up a screw the gray-level pixels number in region for analyzing the current picture that absorbs
Amount；
Judge module, for judging gray-level pixels quantity that gray analysis module analysis obtain whether pre-
If critical field in, if exceed default critical field, judge that the mobile terminal screw detecting is different
Often；If in the range of preset standard, judging that the mobile terminal screw detecting passes through.
As a further improvement, the equipment is also included：
Memory module, characteristic information and positional information for preserving characteristic area in normal pictures, and
The positional information in screw region in the normal pictures；Wherein, normal pictures are led to by vision testing machine to advance
Cross the mobile terminal of manual detection and carry out picture picked-up and obtain.
As a further improvement, the equipment is also included：
Characteristic area searching modul, the characteristic information of the normal pictures for being preserved according to memory module,
It is determined that the current positional information for absorbing the characteristic area on picture；
Location comparison module, for the characteristic area positional information of normal pictures that will be preserved and characteristic area
Characteristic area positional information compares determined by domain lookup module, determines displacement compensation amount；
Position compensation module, for the displacement compensation amount and the guarantor in memory module that determine location comparison module
The screw zone position information deposited is superimposed, obtain currently absorb picture tighten up a screw region position believe
Breath.
As a further improvement, the positional information in this feature region comprises at least transverse axis position, longitudinal axis positions
And the anglec of rotation；The displacement compensation amount comprises at least transverse axis position difference, longitudinal axis positions difference and the anglec of rotation
Degree difference.
As a further improvement, the picture picked-up control module is in mobile terminal moves to vision testing machine
When in the induction range of default sensor, the camera on control vision testing machine enters to the mobile terminal
Row picture picked-up.
Compared with prior art, the main distinction and its effect are embodiment of the present invention：Examined by vision
Survey machine carries out picture picked-up to mobile terminal to be detected, and analysis is current to absorb picture and tighten up a screw region
Whether gray-level pixels quantity, if exceeding default critical field, is sentenced in default critical field
The fixed mobile terminal screw detecting exception；If in the range of preset standard, judging the mobile terminal spiral shell
Silk detection passes through.With it, cost of labor can be reduced, shorten detection time, at utmost drop
Low drain is examined and probability of false detection.
Vision testing machine carries out picture picked-up to the mobile terminal by manual detection in advance, from what is absorbed
A characteristic area is selected in normal pictures, the characteristic information and positional information in this feature region is preserved, and
The positional information in screw region in the normal pictures.When carrying out actually detected, according to the standard for being preserved
The characteristic information of picture, it is determined that the current positional information for absorbing the characteristic area on picture, will be preserved
Normal pictures characteristic area positional information compared with the current characteristic area positional information for determining, really
Determine displacement compensation amount, displacement compensation amount is superimposed with the screw zone position information for having preserved, worked as
Preceding absorbed picture is tightened up a screw the positional information in region.So as to without manually amendment mobile terminal position
Put, and the accuracy of vision-based detection can be ensured.
Brief description of the drawings
Fig. 1 is the visible detection method flow chart that mobile terminal is tightened up a screw in first embodiment of the invention；
Fig. 2 is mobile terminal screw vision detection control device structure chart in second embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to of the invention
Implementation method is described in further detail.
First embodiment of the invention is related to the visible detection method that a kind of mobile terminal is tightened up a screw, such as Fig. 1
It is shown.
It is (i.e. good beforehand through the vision testing machine mobile terminal without exception to manual detection in step 101
Product) picture picked-up is carried out, obtain a normal pictures.Under normal circumstances, vision is moved to by mobile terminal
When in the induction range of the sensor installed in detection machine, the camera on triggering vision testing machine is to the shifting
Dynamic terminal carries out picture picked-up, obtains normal pictures.
In step 102, a characteristic area is selected from the normal pictures absorbed, characteristic area here
Referring to can be with the region of unique identification, such as region with special shape.Preserve the spy in this feature region
Reference ceases the positional information in screw region in (such as shape information) and positional information, and the normal pictures.
Here positional information is typically determined by transverse axis position, longitudinal axis positions and the anglec of rotation.
After completing above-mentioned predetermined registration operation, into normal testing process.In step 103, shifting to be detected
Dynamic terminal is moved with transmission belt, when in the induction range for move to sensor, triggers camera
Picture picked-up is carried out to the mobile terminal.
In step 104, according to the characteristic information of the normal pictures for being preserved, it is determined that currently absorbing picture
The positional information of upper characteristic area.
In step 105, the spy of the characteristic area positional information of the normal pictures that will be preserved and current determination
Levy zone position information to compare, determine displacement compensation amount.The displacement compensation amount generally comprises transverse axis position
Difference, longitudinal axis positions difference and anglec of rotation difference.
In step 106, identified displacement compensation amount is stacked with the screw zone position information for having preserved
Plus, obtain currently absorbing picture and tighten up a screw the positional information in region, output screw area image.
In step 107, analysis is current to absorb the tighten up a screw gray-level pixels quantity of area image of picture is
It is no in default critical field, if exceeding default critical field, into step 108, judge
The mobile terminal screw detecting exception；If in the range of preset standard, into step 109, judged
The mobile terminal screw detecting passes through.By analyzing the overall intensity level pixel quantity of screw image, reflection
In figure gray scale occur frequency, can effectively distinguish screw according to situation；Under normal circumstances, screw is deposited
In the case of, the gray value of screw area image is 30-50；In the case of screw does not exist, screw region shadow
The gray value of picture is 100-120, and both distinguish fairly obvious.
In step 108, testing result is preserved, be uploaded to database.
By the visible detection method, without artificial participation, regarding for screw can be completed rapidly and accurately
Feel detection.Cost of labor can be effectively reduced, shortens detection time, at utmost reduce missing inspection and flase drop
Probability.And the accuracy of vision-based detection can be ensured.
Present embodiment relative to prior art, with following advantage：
1. manpower aspect contrast:Implement preceding 1 people and be responsible for checkSFC and visual inspection；Without people after implementation
Work, automatic detection with and testing result uploads database automatically；
2. working method contrast：Manually picked and placeed before implementing, elapsed time；On-line automatic inspection after implementation,
These waste motions need not be picked and placeed；
3. detection time contrast：Manual Visual Inspection substantially 10S or so before implementing；Machine detection time after implementation
1S, improves 9 times；
4. work fatigue degree, time contrast：Implementation forefathers section chief's phase work fatigue, the various erroneous judgements of appearance,
Negative feeling, time rest of putting into several classes；Non-stop run in 24 hours, reliable and stable after implementation；
5. integral layout influence：It is entirely artificial operation, a messenger of line 20 before implementing；Add after implementation
Enter equipment, lift automatization level, reduce artificial；
6. missing inspection ratio contrast：Artificial residual error ratio example 2% (missing inspection quantity/amount detection) before implementing；It is real
It is 0 to apply rear machine missing inspection ratio；
7. erroneous judgement ratio contrast：Exist before implementing and NG (exception) is manually mistaken for PASS (passing through)
Phenomenon；Machine flase drop ratio is 0 after implementation.
Second embodiment of the invention also provides a kind of mobile terminal screw vision detection control device, such as schemes
Shown in 2, comprising：
Memory module, characteristic information and positional information for preserving characteristic area in normal pictures, and
The positional information in screw region in the normal pictures；Wherein, normal pictures are led to by vision testing machine to advance
Cross the mobile terminal of manual detection and carry out picture picked-up and obtain.
Picture picked-up control module, for controlling vision testing machine to carry out picture to mobile terminal to be detected
Intake；Specifically can be in mobile terminal moves to vision testing machine in the induction range of default sensor
When, the camera on control vision testing machine carries out picture picked-up to the mobile terminal.
Picture receiver module, for obtaining the picture for currently being absorbed from the vision testing machine；
Characteristic area searching modul, the characteristic information of the normal pictures for being preserved according to memory module,
It is determined that the current positional information for absorbing the characteristic area on picture；
Location comparison module, for the characteristic area positional information of normal pictures that will be preserved and characteristic area
Characteristic area positional information compares determined by domain lookup module, determines displacement compensation amount；
Position compensation module, for the displacement compensation amount and the guarantor in memory module that determine location comparison module
The screw zone position information deposited is superimposed, obtain currently absorb picture tighten up a screw region position believe
Breath.Wherein, the positional information of above-mentioned characteristic area includes transverse axis position, longitudinal axis positions and the anglec of rotation
Degree；Displacement compensation amount includes transverse axis position difference, longitudinal axis positions difference and anglec of rotation difference.
Gray analysis module, tightens up a screw the gray-level pixels number in region for analyzing the current picture that absorbs
Amount；
Judge module, for judging gray-level pixels quantity that gray analysis module analysis obtain whether pre-
If critical field in, if exceed default critical field, judge that the mobile terminal screw detecting is different
Often；If in the range of preset standard, judging that the mobile terminal screw detecting passes through.
By the vision-based detection control device, without artificial participation, screw can be completed rapidly and accurately
Vision-based detection.Can effectively reduce cost of labor, shorten detection time, at utmost reduce missing inspection and
Probability of false detection.And the accuracy of vision-based detection can be ensured.
Although by referring to some of the preferred embodiment of the invention, be shown to the present invention and retouched
State, but it will be understood by those skilled in the art that can to it, various changes can be made in the form and details,
Without departing from the spirit and scope of the present invention.
Claims (10)
1. the visible detection method that a kind of mobile terminal is tightened up a screw, it is characterised in that comprising following step
Suddenly：
Vision testing machine carries out picture picked-up to mobile terminal to be detected, and analysis is currently absorbed on picture
Whether the gray-level pixels quantity in screw region is in default critical field, if exceeding default standard
Scope, then judge the mobile terminal screw detecting exception；If in the range of preset standard, judging should
Mobile terminal screw detecting passes through.
2. the visible detection method that mobile terminal according to claim 1 is tightened up a screw, its feature exists
In, the step of the vision testing machine carries out picture picked-up to mobile terminal to be detected before, also include
Following steps：
Vision testing machine carries out picture picked-up to the mobile terminal by manual detection in advance, from what is absorbed
A characteristic area is selected in normal pictures, the characteristic information and positional information in this feature region is preserved, and
The positional information in screw region in the normal pictures.
3. the visible detection method that mobile terminal according to claim 2 is tightened up a screw, its feature exists
In, the step of the vision testing machine carries out picture picked-up to mobile terminal to be detected after, also include
Following steps：
According to the characteristic information of the normal pictures for being preserved, it is determined that the current characteristic area absorbed on picture
Positional information, the characteristic area positional information of the normal pictures that will be preserved and the current characteristic area for determining
Location information domain compares, and determines displacement compensation amount, by the displacement compensation amount and the screw area for having preserved
Location information domain is superimposed, obtains currently absorbing picture and tightens up a screw the positional information in region.
4. the visible detection method that mobile terminal according to claim 3 is tightened up a screw, its feature exists
In the positional information of the characteristic area comprises at least transverse axis position, longitudinal axis positions and the anglec of rotation；
It is poor that the displacement compensation amount comprises at least transverse axis position difference, longitudinal axis positions difference and the anglec of rotation
Value.
5. the vision-based detection side that mobile terminal as claimed in any of claims 1 to 4 is tightened up a screw
Method, it is characterised in that in the step of vision testing machine carries out picture picked-up to mobile terminal, in institute
State mobile terminal to move to when in the induction range of default sensor in vision testing machine, regarded described in triggering
Feel that the camera in detection machine carries out picture picked-up to the mobile terminal.
6. a kind of mobile terminal screw vision detects control device, it is characterised in that include：
Picture picked-up control module, for controlling vision testing machine to carry out picture to mobile terminal to be detected
Intake；
Picture receiver module, for obtaining the picture for currently being absorbed from the vision testing machine；
Gray analysis module, tightens up a screw the gray-level pixels number in region for analyzing the current picture that absorbs
Amount；
Judge module, for judging whether is gray-level pixels quantity that the gray analysis module analysis obtain
In default critical field, if exceeding default critical field, judge that the mobile terminal screw is examined
Survey abnormal；If in the range of preset standard, judging that the mobile terminal screw detecting passes through.
7. mobile terminal screw vision according to claim 6 detects control device, and its feature exists
In also including：
Memory module, characteristic information and positional information for preserving characteristic area in normal pictures, and
The positional information in screw region in the normal pictures；The normal pictures by vision testing machine to beforehand through
The mobile terminal of manual detection carries out picture picked-up and obtains.
8. mobile terminal screw vision according to claim 7 detects control device, and its feature exists
In also including：
Characteristic area searching modul, the feature letter of the normal pictures for being preserved according to the memory module
Breath, it is determined that the current positional information for absorbing the characteristic area on picture；
Location comparison module, for the characteristic area positional information of normal pictures that will be preserved and characteristic area
Characteristic area positional information compares determined by domain lookup module, determines displacement compensation amount；
Position compensation module, for the displacement compensation amount for determining the location comparison module and the storage
The screw zone position information preserved in module is superimposed, obtains currently absorbing picture and tightens up a screw region
Positional information.
9. mobile terminal screw vision according to claim 8 detects control device, and its feature exists
In the positional information of the characteristic area comprises at least transverse axis position, longitudinal axis positions and the anglec of rotation；
It is poor that the displacement compensation amount comprises at least transverse axis position difference, longitudinal axis positions difference and the anglec of rotation
Value.
10. the mobile terminal screw vision detection control according to any one in claim 6 to 9
Equipment, it is characterised in that the picture picked-up control module moves to vision-based detection in the mobile terminal
When in machine in the induction range of default sensor, the camera on the vision testing machine is controlled to the shifting
Dynamic terminal carries out picture picked-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026683.9A CN106932005A (en) | 2015-12-30 | 2015-12-30 | Visible detection method and control device that a kind of mobile terminal is tightened up a screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026683.9A CN106932005A (en) | 2015-12-30 | 2015-12-30 | Visible detection method and control device that a kind of mobile terminal is tightened up a screw |
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|---|---|
| CN106932005A true CN106932005A (en) | 2017-07-07 |
Family
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| CN201511026683.9A Pending CN106932005A (en) | 2015-12-30 | 2015-12-30 | Visible detection method and control device that a kind of mobile terminal is tightened up a screw |
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| CN113129264A (en) * | 2021-03-17 | 2021-07-16 | 联想(北京)有限公司 | Image processing method and device |
| CN113129264B (en) * | 2021-03-17 | 2024-07-26 | 联想(北京)有限公司 | Image processing method and device |
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