CN110132612A - A kind of defrosting effect scalarization method suitable for the performance test that defrosts - Google Patents
A kind of defrosting effect scalarization method suitable for the performance test that defrosts Download PDFInfo
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- CN110132612A CN110132612A CN201910467888.2A CN201910467888A CN110132612A CN 110132612 A CN110132612 A CN 110132612A CN 201910467888 A CN201910467888 A CN 201910467888A CN 110132612 A CN110132612 A CN 110132612A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
- G01B11/285—Measuring arrangements characterised by the use of optical techniques for measuring areas using photoelectric detection means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
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Abstract
The present invention relates to defrosting performance test technical fields, specifically disclose a kind of defrosting effect scalarization method suitable for the performance test that defrosts, the image for including the following steps: S1, obtaining front screen；S2, the profile based on image zooming-out front screen；S3, the area A, the profile in the area A ' and the area B are extracted；S4, the profile that frost layer eliminates region is extracted；S5, calculating frost layer eliminate region area in the area A, the area accounting in the area A ' and the area B.Defrosting effect in the prior art can solve using technical solution of the present invention and detect inaccurate problem.
Description
Technical field
The present invention relates to defrosting performance test technical field, in particular to a kind of defrosting suitable for the performance test that defrosts is imitated
Fruit scalarization method.
Background technique
Safety is all problem extremely important in automobile industry all the time, the vehicle especially travelled in rain, snowy day gas
, guarantee that the field range of driver is clearly particularly important.When weather cold, automobile front windowpane outer surface easily forms frost layer.
To guarantee traffic safety, in use, needing first to eliminate the frost layer of glass surface.
Rule in national standard " performance and test method of GB11555-2009 automobile window glass defrosting and defogging system "
The test method and evaluation criterion of defrosting are determined.Evaluation criterion require defrosting test start the area front screen A in rear certain time,
The area A ', the area B respectively reach certain frost layer and eliminate ratio, for example " after on-test 20min, a-quadrant has 80% to be completed to remove
Frost ".
It obtains each region frost layer and eliminates area usually there are two types of way.First, during defrosting test, every five minutes
The profile scribing line for eliminating region to frost layer is described.After the test, the contour line for counting each time point record, with the existing area A,
The area A ', the area B profile are compared, and are confirmed whether the requirement being up to state standards；Second, camera is arranged in the car, every certain
Time photograph, record frost layer eliminate situation, after test, are artificially judged to eliminate whether area accounting meets state according to the picture of record
Family's standard.Method one in test needs staff to retouch line with crayon on front screen, is not easy to operate, different moments retouch
The profile drawn mixes, and is not easy to recognize in a jumble.Although method two gets off the process record of defrosting, lack to note
The processing for recording information, can not accurately provide frost layer and eliminate the percentage that area accounts for each region area.Both methods all can only
Judge whether defrosting effect meets national standard by the way of artificially estimating, it is not accurate enough, it is not objective enough.On the other hand,
Both the above method test result information obtained due to not no depth processing, can not with the test results of other vehicles into
Row across comparison, defrosting simulation analysis when also can not be for the Automobile Design stage provide support.
In order to accurately judge whether Defroster device for vehicle test result meets national standard, and maximumlly make good use of defrosting
Obtained information is tested, a kind of accurate defrosting effect detection method is needed.
Summary of the invention
The purpose of the present invention is to provide a kind of defrosting effect scalarization methods suitable for the performance test that defrosts, to solve
Defrosting effect detects inaccurate problem in the prior art.
In order to solve the above technical problems, technical solution of the present invention is as follows:
A kind of defrosting effect scalarization method suitable for the performance test that defrosts, includes the following steps:
S1, the image for obtaining front screen；
S2, the profile based on image zooming-out front screen；
S3, the area A, the profile in the area A ' and the area B are extracted；
S4, the profile that frost layer eliminates region is extracted；
S5, calculating frost layer eliminate region area in the area A, the area accounting in the area A ' and the area B.
It base case principle and has the beneficial effect that:
This programme handles the image of the front screen obtained during defrosting, passes through the method for image recognition, meter
It calculates frost layer and eliminates region area in the area A, the exact value of the area accounting in the area A ' and the area B.So that defrosting test result objectifies,
Without the supposition defrosting area accounting of tester's subjectivity, to make the evaluation of test result also more objective.
This programme can accurately extract in defrosting test each time point, each region frost layer eliminates the accounting of area, and directly
It is compared with the requirement in national standard, judges whether to meet national standard.
Frost layer when this programme also can get the vehicle defrosting test eliminates the detailed process record that region changes over time,
There is reference significance for the exploitation of the subsequent vehicle using same defrosting configuration.Such as it can be used for the l-G simulation test of other vehicles
In, demarcate its defrost performance simulation as a result, making simulation result that can more react true situation.
Further, in the S1, perspective correction also is carried out to front screen image.
Due to the influence of capture apparatus lens optical characteristic, the image of front screen can have certain distortion.Depending on
Angle correction is avoided that distortion has an impact reference area accounting, to reduce the error calculated.
Further, in the S2, the profile of front screen is also exported, obtains the whether complete judging result of profile；If
Completely, turn to jump to S3, if imperfect, send the request of manual extraction front screen profile, and obtain the front window of manual extraction
Glass contours.
Staff can be with manpower intervention, to check whether automatically extract front screen profile accurate, and timely correction.
Further, in the S4, before extracting frost layer and eliminating region contour, the bright feature of image is also extracted, is based on light
Bright feature extraction frost layer eliminates region contour.
Since frost layer eliminates, region is brighter, the profile for calculating lighted region that can be convenient by bright feature, also
It has obtained frost layer and has eliminated region contour.
Further, further include S6, frost layer is eliminated into region area in the area A, the area accounting and national standard in the area A ' and the area B
It compares, judges whether to meet national standard, and export judging result.
It sees whether to meet national standard convenient for allowing tester to pass through judging result at the first time.
Further, in the S1, the shooting time of front screen image is also recorded.
Time is reference quantity critically important in test, and the records photographing time helps to obtain accurate judging result.
Further, in the S6, the shooting time calculating test of shooting time and present image also based on first image
The progress time；When judging whether to meet national standard, will also be compared with national standard the progress time.
It calculates and carries out the time, convenient for being compared with national standard.
Further, in the S1, the image of a front screen was obtained at interval of 1-5 minutes.
The detailed process record that region changes over time is eliminated convenient for obtaining frost layer.
Further, in the S6, the judging result of output includes the area A, the individual Qualification in the area A ' and the area B and front window glass
The Qualification of glass entirety；If carrying out the time is less than the time specified in national standard, the conjunction of front screen entirety is not exported
Lattice situation.
When carrying out the time less than the time specified in national standard, test is also not finished, and currently certain is one or more discontented
Sufficient national standard cannot represent final result and be unsatisfactory for national standard, therefore not export the Qualification of front screen entirety.
Further, in the S2, gray proces first are carried out to image, image gradient algorithm is recycled to extract front screen
Profile.
Gray proces are first carried out, the front screen profile extracted can be allowed more acurrate.
Detailed description of the invention
Fig. 1 is a kind of flow chart of defrosting effect scalarization method embodiment one suitable for the performance test that defrosts；
Fig. 2 is the image of front screen before embodiment one defrosts；
Fig. 3 is the image of front screen after the defrosting a period of time of embodiment one.
Specific embodiment
It is further described below by specific embodiment:
Embodiment one
A kind of defrosting effect suitable for the performance test that defrosts quantizes system, including image capture module, processing module,
Input module, memory module and display module.
Image capture module is used to acquire the image of front screen since when testing starting, by the shooting of image and image
Time stores to memory module；In the present embodiment, image capture module uses camera.When selecting camera, it is considered as camera lens
Focal length, select the camera for carrying wide-angle lens of the equivalent focal length less than 30mm, preferably convenient for shooting complete front screen
Image.Camera is specifically spaced 1 minute at interval of the image of shooting in 1-5 minutes in the present embodiment；In other embodiments,
It can be by the way of camera video recording；The picture in primary video recording, which is extracted, every several frames obtains front screen image to realize
Purpose.Memory module can select the storage mediums such as mechanical hard disk or solid state hard disk, and memory capacity suggestion is greater than 5G, consider
It is all the problem of 120G starts to walk, is generally not in memory space inadequate to various hard disc storage capacities at present on the market.
Processing module obtains image from memory module, carries out perspective correction to image.In the present embodiment, processing module is adopted
With Intel Intel Core i7-9700k CPU.The mode of perspective correction is the coordinate for obtaining the several points of image, passes through coordinate meter
The transformation matrix of perspective transform is calculated, executes the transformation of transformation matrix to whole image later, so that it may realize the visual angle of image
Correction.A kind of mode of perspective correction is merely provided in the present embodiment, other mature visual angle schools can be selected in practical application
Positive way.
After perspective correction, processing module extracts the profile of front screen in image, and profile is sent to display module.This reality
It applies and extracts the profile of front screen in image in example by the way of are as follows: gray proces first are carried out to image, then recycle figure
As gradient algorithm extracts the profile of front screen.
The partial code of gray proces is as follows:
The present embodiment merely provides a kind of algorithm of contours extract, since the algorithm of contours extract is the prior art,
In practical application, code provided in this embodiment can be replaced with other codes, as long as achieving the purpose that contours extract.
When the complete signal of input module input profile, processing module extracts the area A, the profile in the area A ' and the area B.About A
Area, the division in the area A ' and the area B, in " performance and test method of GB11555-2009 automobile window glass defrosting and defogging system "
National standard in have detailed introduction, which is not described herein again, for convenience of reading, hereinafter " GB11555-2009 automobile air window
The performance and test method of glass defrosting and defogging system " it is referred to as national standard.
In the present embodiment, input module uses keyboard and mouse.When profile is imperfect, by input module input picture
The profile of front screen, then the area A, the profile in the area A ' and the area B are extracted by processing module.In practice, in image front screen wheel
Exterior feature can be manually entered by staff by keyboard and mouse.
Processing module also extracts the bright feature of front screen image, specifically, front screen image gray processing is extracted
After gray processing in image pixel luminance information, using the luminance information of pixel as bright feature.It is mentioned based on bright feature
It takes frost layer to eliminate region contour, and calculates frost layer and eliminate region area in the area A, the area accounting in the area A ' and the area B.Since frost layer is removed
Region to the greatest extent is brighter, and the profile for calculating lighted region that can be convenient by bright feature has also just obtained frost layer and eliminated region
Profile.
The progress time of the shooting time calculating test of shooting time and present image of the processing module based on first image.
Processing module will carry out the time, and frost layer eliminates region area in the area A, and the area accounting and national standard in the area A ' and the area B carry out one
One comparison, judges whether to meet national standard, and export judging result by display module.In the present embodiment, display module is adopted
Use display screen.
Specifically, being provided in national standard, the requirement of front screen defrosting are as follows:
20min after on-test, a-quadrant have 80% defrosting is completed；
The region 25min after on-test, A ' has 80% defrosting is completed；
40min after on-test, B area have 80% defrosting is completed.
Processing module will carry out the time specified in time and national standard, and frost layer eliminates region area in the area A, the area A ' and
To the area A in the area accounting in the area B and national standard, the requirement accounting in the area A ' and the area B is compared one by one.The judging result of output
Including the area A, the Qualification of the individual Qualification in the area A ' and the area B and front screen entirety；If carrying out the time is less than country's mark
Time specified in standard does not export the Qualification of front screen entirety.
For example, situation one, the progress time is 15min, and frost layer eliminates region area in the area A, the area accounting in the area A ' and the area B
Respectively 80%, 75% and 60%, after being compared with national standard, the result of output are as follows: the area A, it is qualified；The area A ', does not conform to
Lattice, the area B are unqualified.Situation two, progress time are 30min, and frost layer eliminates region area in the area A, and the area in the area A ' and the area B accounts for
Than being respectively 90%, 85% and 90%, after being compared with national standard, the result of output are as follows: the area A, it is qualified；The area A ',
Qualification, the area B are unqualified.Situation three, progress time are 40min, and frost layer eliminates region area in the area A, the area in the area A ' and the area B
Accounting is respectively 99%, 99% and 98%, after being compared with national standard, the result of output are as follows: and the area A, it is qualified；The area A ',
Qualified, the area B is qualified；Overall acceptability.
The system as shown in Figure 1, defrosting effect based on the performance test that is suitable for defrosting quantizes, the present embodiment provides one kind
Suitable for the defrosting effect scalarization method for the performance test that defrosts, include the following steps:
S1, as shown in Fig. 2, at interval of 1-5 minutes obtain a front screen image；Front screen image is regarded
Angle correction, records the shooting time of front screen image；In the present embodiment, specific interval 1 minute；
S2, gray proces first are carried out to image, image gradient algorithm is recycled to extract the profile of front screen；Before output
The profile of glass pane, obtains whether front screen profile completely instructs, if completely, turning to jump to S3, if imperfect, obtains
The front screen profile of manual extraction；
S3, the area front screen contours extract A, the profile in the area A ' and the area B are based on；
S4, as shown in figure 3, extract image bright feature, region contour is eliminated based on bright feature extraction frost layer；
S5, calculating frost layer eliminate region area in the area A, the area accounting in the area A ' and the area B.
The shooting time of S6, the shooting time based on first image and present image calculate the progress time of test.It will be into
Row time, frost layer eliminate region area in the area A, and the area accounting in the area A ' and the area B is compared with national standard, judge whether full
Sufficient national standard, and judging result is exported by display module.The judging result of output includes the area A, and the area A ' and the area B are individually closed
The Qualification of lattice situation and front screen entirety；If being less than the time specified in national standard when carrying out, front window is not exported
The Qualification of glass entirety.
Embodiment two
A kind of defrosting effect numeralization system suitable for the performance test that defrosts, the difference with embodiment one is, also wraps
Include water spray module.Module of spraying water includes two symmetrical pedestals, is fixedly connected to first servo motor on pedestal；In the present embodiment
It is fixed especially by bolt.First servo motor is sequentially connected with the first screw rod being vertically arranged, and is cased with first on the first screw rod
Feed screw nut；It further include horizontally disposed transverse arm, the both ends of transverse arm are welded with the first feed screw nut respectively, and transverse arm screw is connected with
Second servo motor, the second servo motor horizontal conveyor are connected with the second screw rod, the second feed screw nut are cased on the second screw rod；Also
Including spray gun, spray gun is welded on the second feed screw nut；Spray gun supply water can by hose directly with the fire hose of living water
Head connection；It can also be connect by hose with water pump, be the prior art to spray gun water supply, which is not described herein again.It further include control
Device, controller are connect with first servo motor and the second servo motor signal, and controller is for controlling first servo motor and the
Two servo motors rotation, so that the first feed screw nut moves in the horizontal direction in vertical direction movement and the second feed screw nut；?
Spray gun is exactly controlled in vertically and horizontally upper movement.In the present embodiment, the jet orifice diameter 1.7mm of spray gun, work
Pressure 350kPa ± 20kPa；Liquid flowing rate 0.395L/min；Away from the spray cone diameter formed at nozzle 200mm be 300mm ±
50mm。
Controller is connect with processing module signal；Processor is used to control spray gun to any of front screen by controller
Region water spray, processing module is also by the regions store of water spray into memory module.In the present embodiment, controller uses Te Kabao board
42-57 controllor for step-by-step motor, due to such controller not tape drive, it is also necessary to be equipped with the driving of TB6560-3A stepper motor
Device.
Based on a kind of defrosting effect numeralization system suitable for the performance test that defrosts, the present embodiment also provides a kind of be applicable in
In the defrosting effect scalarization method of defrosting performance test, include the following steps:
S1, water spray module is placed in immediately ahead of automobile, transverse arm is made to be parallel to front screen；
S2, it is uniformly sprayed water by spray gun to front screen；
S3, after front screen generates uniform ice sheet, spray water at random to the partial region of front screen；Record with
The region of machine water spray；
After S4, experiment start, the image of a front screen was obtained at interval of 1-5 minutes；Front screen image is carried out
Perspective correction records the shooting time of front screen image；In the present embodiment, specific interval 1 minute；
S5, gray proces first are carried out to image, image gradient algorithm is recycled to extract the profile of front screen；Before output
The profile of glass pane, obtains whether front screen profile completely instructs, if completely, turning to jump to S6, if imperfect, obtains
The front screen profile of manual extraction, and after turn to jump to S6；
S6, the area front screen contours extract A, the profile in the area A ' and the area B are based on；
S7, the bright feature for extracting image, eliminate region contour based on bright feature extraction frost layer；
S8, calculating frost layer eliminate region area in the area A, the area accounting in the area A ' and the area B；
The shooting time of S9, the shooting time based on first image and present image calculate the progress time of test.It will be into
Row time, frost layer eliminate region area in the area A, and the area accounting in the area A ' and the area B is compared with national standard, judge whether full
Sufficient national standard, and judging result is exported by display module.The judging result of output includes the area A, and the area A ' and the area B are individually closed
The Qualification of lattice situation and front screen entirety；If carrying out the time is less than the time specified in national standard, before not exporting
The Qualification of glass pane entirety.
S10, calculating frost layer eliminate area in the area accounting in the region sprayed water at random and export calculated result.
The experimental enviroment of national standard is a kind of ideal experimental enviroment, preceding since environment is complicated in reality
Uniform ice sheet easily generated is not allowed on glass pane, this programme is in order to preferably examine defrosting performance；It is generated in front screen uniform
Ice sheet after, random water spray again, situation that can be different with front screen frosting thickness in simulating natural environment.Frost layer is calculated to remove
Area is use up in the area accounting in the region sprayed water at random and exports calculated result, it is available except defrosting system is big to frost thickness
The specific data of region defrosting, defrosting simulation analysis when for the Automobile Design stage provides support, to design defrosting effect
Defrosting system is preferably removed, the safety of driving is improved.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (10)
1. a kind of defrosting effect scalarization method suitable for the performance test that defrosts, which comprises the steps of:
S1, the image for obtaining front screen；
S2, the profile based on image zooming-out front screen；
S3, the area A, the profile in the area A ' and the area B are extracted；
S4, the profile that frost layer eliminates region is extracted；
S5, calculating frost layer eliminate region area in the area A, the area accounting in the area A ' and the area B.
2. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 1, feature exist
In: in the S1, perspective correction also is carried out to front screen image.
3. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 1, feature exist
In: in the S2, the profile of front screen is also exported, obtains the whether complete judging result of profile；If complete, turn to jump to
S3 sends the request of manual extraction front screen profile if imperfect, and obtains the front screen profile of manual extraction.
4. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 1, feature exist
In: in the S4, before extracting frost layer and eliminating region contour, the bright feature of image is also extracted, based on bright feature extraction frost
Layer eliminates region contour.
5. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 1, feature exist
In: further include S6, frost layer is eliminated into region area in the area A, the area accounting in the area A ' and the area B is compared with national standard, is sentenced
It is disconnected whether to meet national standard, and export judging result.
6. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 5, feature exist
In: in the S1, also record the shooting time of front screen image.
7. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 6, feature exist
In: in the S6, the progress time of the shooting time calculating test of shooting time and present image also based on first image；?
When judging whether to meet national standard, it will also be compared with national standard the progress time.
8. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 7, feature exist
In: in the S1, the image of a front screen was obtained at interval of 1-5 minutes.
9. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 8, feature exist
In: in the S6, the judging result of output includes the area A, the qualification of the individual Qualification in the area A ' and the area B and front screen entirety
Situation；If carrying out the time is less than the time specified in national standard, the Qualification of front screen entirety is not exported.
10. a kind of defrosting effect scalarization method suitable for the performance test that defrosts according to claim 9, feature exist
In: in the S2, gray proces first are carried out to image, image gradient algorithm is recycled to extract the profile of front screen.
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| CN111823820A (en) * | 2020-08-03 | 2020-10-27 | 安徽江淮汽车集团股份有限公司 | Method and device for detecting defrosting performance of automobile, storage medium and device |
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Application publication date: 20190816 |