CN107478658A - Crack detecting method and device - Google Patents
Crack detecting method and device Download PDFInfo
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- CN107478658A CN107478658A CN201710711073.5A CN201710711073A CN107478658A CN 107478658 A CN107478658 A CN 107478658A CN 201710711073 A CN201710711073 A CN 201710711073A CN 107478658 A CN107478658 A CN 107478658A
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- rubbing surface
- crackle
- edge
- image
- surface image
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
Abstract
The invention discloses a kind of crack detecting method and device.Wherein, this method includes：Imaging acquisition rubbing surface image is carried out to the rubbing surface of the brake disc on track train；Identify the crackle in rubbing surface image；The quantity and length of the crackle in detection acquisition rubbing surface image are carried out to the edge of the crackle in rubbing surface image using Sobel operators and Canny operators.The present invention solves the technical problem that crack detection is easily influenceed by human factor in correlation technique, improves the accuracy of crack detection, while also improves the efficiency of crack detection.
Description
Technical field
The present invention relates to automatic detection field, in particular to a kind of crack detecting method and device.
Background technology
China's EMUs use disc braking mostly at present, and the huge braking thermic load of motor train unit train can produce brake disc
Raw very big thermograde, while bear to brake caused alternation external load function.In addition, brake disc used in long-term
Cheng Zhong, its rubbing surface can produce fatigue crack, buckling deformation and abrasion, so in wheel set maintenance, it is ensured that brake disc is in good
Good service state is the key for ensureing train operating safety.Also, in China's overhaul of train-set code, to brake disc friction
Facial cleft line, reflex action deflection and abrasion propose clearly control and required, and are strictly monitored in maintenance.At present, domestic master
The crack length of machine factory and rolling stock section for brake disc rubbing surface in maintenance process is mainly using conversion or artificial counting
Method carrys out the quantity and length of identification and statistics crackle, still, amount of warpage and abrasion loss is measured by the method for artificial clearance gauge, its
As a result accuracy and uniformity by measurement people's subjective factor had a great influence, and count workload it is big, working environment compared with
Difference, this mode is caused to meet hot-short testing requirements.
The problem of easily being influenceed for crack detection in above-mentioned correlation technique by human factor, not yet propose at present effective
Solution.
The content of the invention
The embodiments of the invention provide a kind of crack detecting method and device, at least to solve crack detection in correlation technique
The technical problem easily influenceed by human factor.
One side according to embodiments of the present invention, there is provided a kind of crack detecting method, including：To on track train
The rubbing surface of brake disc carries out imaging and obtains rubbing surface image；Identify the crackle in rubbing surface image；Using Sobel operators and
Canny operators carry out the quantity and length that detection obtains the crackle in rubbing surface image to the edge of the crackle in rubbing surface image
Degree.
Alternatively, identify that the crackle in rubbing surface image includes：According to characteristics of image of the crackle on rubbing surface image
Difference, the crackle in rubbing surface image is identified, wherein, characteristics of image includes at least one of：Gray scale, color, and texture.
Alternatively, detection is carried out to the edge of the crackle in rubbing surface image and obtained using Sobel operators and Canny operators
Before the quantity and length that obtain the crackle in rubbing surface image, in addition to：Identify the edge of the crackle in rubbing surface image；To knowing
Other edge uses morphology processing, obtains the crackle for eliminating pseudo-edge.
Alternatively, detection is carried out to the edge of the crackle in rubbing surface image and obtained using Sobel operators and Canny operators
After the quantity and length that obtain the crackle in rubbing surface image, in addition to：Whether the quantity for the crackle for judging to obtain exceedes quantity
Whether threshold value, and/or the length of crackle exceed length threshold；In the case where the judgment result is yes, amount shipped out warning information
And/or length warning information.
Alternatively, when the rubbing surface of the brake disc on to track train carries out imaging acquisition rubbing surface image, in addition to：
The thickness of the rubbing surface of brake disc is measured using laser range finder, obtains the side of abrasion loss and rubbing surface in the middle part of rubbing surface
Edge buckling deformation amount.
Alternatively, the thickness of the rubbing surface of brake disc is measured using laser range finder, obtained in the middle part of rubbing surface
After the edge warping deflection of abrasion loss and rubbing surface, in addition to：Whether abrasion loss exceedes in the middle part of the rubbing surface for judging to obtain
Whether middle part abrasion loss threshold value, and/or edge warping deflection exceed edge warping deflection threshold value；In judged result for yes
In the case of, send middle part abrasion warning information and/or edge warping deformation warning information.
According to another aspect of the present invention, there is provided a kind of crack detection device, including：Image-forming module, for track
The rubbing surface of brake disc on train carries out imaging and obtains rubbing surface image；First identification module, for identifying the rubbing surface
Crackle in image；Detection module, for using Sobel operators and Canny operators to the crackle in the rubbing surface image
Edge carries out the quantity and length that detection obtains the crackle in the rubbing surface image.
Alternatively, first identification module, the image being additionally operable to according to the crackle on the rubbing surface image are special
The difference of sign, the crackle in the rubbing surface image is identified, wherein, described image feature includes at least one of：Ash
Degree, color, and texture.
Alternatively, the device also includes：Second identification module, for identifying the crackle in the rubbing surface image
Edge；Processing module, for using morphology processing to the edge of identification, obtain the crackle for eliminating pseudo-edge.
Alternatively, the device also includes：Whether the first judge module, the quantity of the crackle for judging to obtain exceed
Whether amount threshold, and/or the length of the crackle exceed length threshold；First alarm module, for sentencing in judge module
In the case that disconnected result is is, amount shipped out warning information and/or length warning information.
Alternatively, the device also includes：Measurement module, the friction for the brake disc on to the track train
When face carries out the imaging acquisition rubbing surface image, the thickness of the rubbing surface of the brake disc is surveyed using laser range finder
Amount, obtain the edge warping deflection of abrasion loss and the rubbing surface in the middle part of the rubbing surface.
Alternatively, the device also includes：Second judge module, the rubbing surface middle part abrasion loss for judging to obtain are
It is no to exceed middle part abrasion loss threshold value, and/or whether the edge warping deflection exceed edge warping deflection threshold value；Second accuses
Alert module, in the case of being in the judged result of second judge module, send middle part abrasion warning information and/or
Edge warping deforms warning information.
In embodiments of the present invention, the edge of Sobel operators and Canny operators to the crackle in rubbing surface image is employed
Carry out detection and obtain the quantity and length of the crackle in rubbing surface image, and then solve in correlation technique crack detection easily by people
For the technical problem of the influence of factor, the accuracy of crack detection is improved, while also improves the efficiency of crack detection.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of crack detecting method according to embodiments of the present invention；
Fig. 2 is the flow chart of optional crack detecting method according to embodiments of the present invention；
Fig. 3 is the brake disk mounted rubbing surface photo of wheel of CCD cameras collection；
Fig. 4 is brake disc rubbing surface fracture edges detection binary map according to embodiments of the present invention；
Fig. 5 is brake disc rubbing surface crack detection results figure according to embodiments of the present invention；And
Fig. 6 is the schematic diagram of crack detection device according to embodiments of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
According to embodiments of the present invention, there is provided a kind of embodiment of the method for crack detecting method is, it is necessary to illustrate, attached
The step of flow of figure illustrates can perform in the computer system of such as one group computer executable instructions, though also,
So logical order is shown in flow charts, but in some cases, can be with different from shown by order execution herein
Or the step of description.
Fig. 1 is the flow chart of crack detecting method according to embodiments of the present invention, as shown in figure 1, this method is including as follows
Step：
Step S102, imaging acquisition rubbing surface image is carried out to the rubbing surface of the brake disc on track train.
Step S104, identify the crackle in rubbing surface image.
Step S106, detection is carried out to the edge of the crackle in rubbing surface image using Sobel operators and Canny operators and obtained
Obtain the quantity and length of the crackle in rubbing surface image.
By above-described embodiment, employ Sobel operators and Canny operators enter to the edge of the crackle in rubbing surface image
Row detection obtains the quantity and length of the crackle in rubbing surface image, and then solves in correlation technique crack detection easily by artificial
The technical problem of the influence of factor, improves the accuracy of crack detection, while also improves the efficiency of crack detection.
In above-mentioned steps S102 into step S106, by the rubbing surface of the brake disc on track train is imaged with
Rubbing surface imaging is obtained, then identifies the crackle in rubbing surface image, then using Sobel operators and Canny operators to rubbing surface
The edge of crackle in image carries out the quantity and length that detection obtains the crackle in rubbing surface image.Due to being calculated using Sobel
Son and Canny operators are combined carries out rim detection to rubbing surface crackle, overcomes and is missed using edge caused by single detective operators
The problem of identification, identify obtained crack length and number be substantially accurate, with the shape of crackle in original image and error in length compared with
It is small.
Specifically, identify that the crackle in rubbing surface image can include：It is special according to image of the crackle on rubbing surface image
The difference of sign, the crackle in rubbing surface image is identified, wherein, characteristics of image can include at least one of：Gray scale, color,
And texture.
It should be noted that identify that the crackle in rubbing surface image can utilize rubbing surface crackle in embodiments of the present invention
It can include with difference of the rubbing surface in picture characteristics：Gray scale, color or texture, length, shape can also be included, recycled
Sobel operators and Canny operators are combined carries out rim detection to rubbing surface crackle.Rim detection based on rubbing surface crackle is calculated
Method, the edge of rubbing surface crackle is have identified, a large amount of pseudo-edges included in image are handled using mathematical mor-phology, obtained
The bianry image of requirement must be met.
Alternatively, detection is carried out to the edge of the crackle in rubbing surface image and obtained using Sobel operators and Canny operators
Before the quantity and length that obtain the crackle in rubbing surface image, in addition to：Identify the edge of the crackle in rubbing surface image；To knowing
Other edge uses morphology processing, obtains the crackle for eliminating pseudo-edge.
Alternatively, detection is carried out to the edge of the crackle in rubbing surface image and obtained using Sobel operators and Canny operators
After the quantity and length that obtain the crackle in rubbing surface image, in addition to：Whether the quantity for the crackle for judging to obtain exceedes quantity
Whether threshold value, and/or the length of crackle exceed length threshold；In the case where the judgment result is yes, amount shipped out warning information
And/or length warning information.
It should be noted that the brake disc rubbing surface Identification of Cracks of the embodiment of the present invention and deformation abrasion automatic testing method
Indexed using driving stepper motor wheel pair and accurately, pass through Daheng MER-500-7UM models camera and Gocator
2330 laser range finders are imaged and obtained deformation abrasion data to each minute of angle, are worn away to identification image and deformation
After data are calibrated, obtained data are identified and analyzed, count the information such as quantity, length, warpage and the abrasion of crackle,
And judged according to written standards and record data, beyond standard set value alarm if in data had.Fig. 2 is root
It is as shown in Figure 2 according to the flow chart of the optional crack detecting method of the embodiment of the present invention, its idiographic flow.Software systems, laser
Ranging Identification of Cracks and warning device (printing reports equipment is connected with warning device) are swashed by host computer equipment with multiple
Optar is connected, and multiple laser range finders are connected with multiple cameras, and multiple cameras are connected with EMUs brake wheel disc, is moved
The connection of car group brake wheel disc communicates with portion's stepper motor, wherein, portion's stepper motor is that electric impulse signal is changed into angular displacement or line position
The open loop control of shifting.
Alternatively, can be with when the rubbing surface of the brake disc on to track train carries out imaging and obtains rubbing surface image
Including：The thickness of the rubbing surface of brake disc is measured using laser range finder, obtains abrasion loss and friction in the middle part of rubbing surface
The edge warping deflection in face.
Specifically, the embodiment of the present invention can also be measured using laser range finder to the thickness of rubbing surface, measurement essence
Spend for 0.01mm, improve the measurement accuracy of abrasion and edge warping in the middle part of rubbing surface, measurement efficiency significantly improves.Further
Ground, the method involved by the embodiment of the present invention are shown identification and measurement result in the form of chart, realize detection brake disc
Life-cycle file administration.
Alternatively, the thickness of the rubbing surface of brake disc is measured using laser range finder, obtained in the middle part of rubbing surface
After the edge warping deflection of abrasion loss and rubbing surface, in addition to：Whether abrasion loss exceedes in the middle part of the rubbing surface for judging to obtain
Whether middle part abrasion loss threshold value, and/or edge warping deflection exceed edge warping deflection threshold value；In judged result for yes
In the case of, send middle part abrasion warning information and/or edge warping deformation warning information.
It should be noted that the above embodiment of the present invention is to utilize the difference of rubbing surface crackle and rubbing surface in picture characteristics
Different (such as gray scale, color or textural characteristics) come the identification realized, Fig. 3 is the brake disk mounted rubbing surface photo of wheel of CCD cameras collection,
Rubbing surface photo carries out rim detection as shown in figure 3, combining using Sobel operators and Canny operators to rubbing surface crackle.It is based on
The edge detection algorithm of rubbing surface crackle, the edge of rubbing surface crackle is have identified, a large amount of pseudo-edges included in image are adopted
Handled with mathematical mor-phology, obtain the bianry image for meeting to require, Fig. 4 is brake disc friction according to embodiments of the present invention
Facial cleft line rim detection binary map, the bianry image are as shown in Figure 4.The crack position that detection obtains merges knot with original image
For fruit as shown in figure 5, wherein, Fig. 5 is brake disc rubbing surface crack detection results figure according to embodiments of the present invention, crack length and
Number is substantially accurate, smaller with the shape and error in length of crackle in original image.
According to another aspect of the present invention, there is provided a kind of crack detection device, Fig. 6 are according to embodiments of the present invention split
The schematic diagram of line detection means, as shown in fig. 6, the device includes：Image-forming module 61, the first identification module 63 and detection module
65.The device is described in detail below.
Image-forming module 61, rubbing surface image is obtained for carrying out imaging to the rubbing surface of the brake disc on track train.
First identification module 63, for identifying the crackle in rubbing surface image.
Detection module 65, for being carried out using Sobel operators and Canny operators to the edge of the crackle in rubbing surface image
Detection obtains the quantity and length of the crackle in rubbing surface image.
By above-described embodiment, imaging acquisition is carried out to the rubbing surface of the brake disc on track train using image-forming module 61
Rubbing surface image, then identify that the crackle in rubbing surface image, then detection module 65 use Sobel using the first identification module 63
Operator and Canny operators carry out the quantity that detection obtains the crackle in rubbing surface image to the edge of the crackle in rubbing surface image
And length, and then solve the technical problem that crack detection is easily influenceed by human factor in correlation technique, improve crackle inspection
The accuracy of survey, while also improve the efficiency of crack detection.
In an optional embodiment, the first identification module, the image on rubbing surface image according to crackle is additionally operable to
The difference of feature, the crackle in rubbing surface image is identified, wherein, characteristics of image includes at least one of：Gray scale, color, and
Texture.
In an optional embodiment, the device also includes：Second identification module, for identifying in rubbing surface image
The edge of crackle；Processing module, for using morphology processing to the edge of identification, acquisition eliminates splitting for pseudo-edge
Line.
In an optional embodiment, the device also includes：First judge module, for the number for the crackle for judging to obtain
Whether amount exceedes amount threshold, and/or whether the length of crackle exceedes length threshold；First alarm module, for judging mould
In the case that the judged result of block is is, amount shipped out warning information and/or length warning information.
In an optional embodiment, the device also includes：Measurement module, for the brake disc on to track train
Rubbing surface carry out imaging obtain rubbing surface image when, the thickness of the rubbing surface of brake disc is surveyed using laser range finder
Amount, obtain the edge warping deflection of abrasion loss and rubbing surface in the middle part of rubbing surface.
In an optional embodiment, the device also includes：Second judge module, for judge obtain rubbing surface in
Whether portion's abrasion loss exceedes middle part abrasion loss threshold value, and/or whether edge warping deflection exceedes edge warping deflection threshold value；
Second alarm module, for the judged result of the second judge module in the case of being, send middle part abrasion warning information and/
Or edge warping deformation warning information.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, it may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, others can be passed through
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (12)
- A kind of 1. crack detecting method, it is characterised in that including：Imaging acquisition rubbing surface image is carried out to the rubbing surface of the brake disc on track train；Identify the crackle in the rubbing surface image；The edge of the crackle in the rubbing surface image rub described in detection acquisition using Sobel operators and Canny operators The quantity and length of crackle in the image of wiping face.
- 2. according to the method for claim 1, it is characterised in that identify that the crackle in the rubbing surface image includes：According to the difference of characteristics of image of the crackle on the rubbing surface image, identify described in the rubbing surface image Crackle, wherein, described image feature includes at least one of：Gray scale, color, and texture.
- 3. according to the method for claim 1, it is characterised in that using the Sobel operators and the Canny operators pair The edge of crackle in the rubbing surface image carry out detection obtain crackle in the rubbing surface image quantity and length it Before, in addition to：Identify the edge of the crackle in the rubbing surface image；Morphology processing is used to the edge of identification, obtains the crackle for eliminating pseudo-edge.
- 4. according to the method for claim 1, it is characterised in that using the Sobel operators and the Canny operators pair The edge of crackle in the rubbing surface image carry out detection obtain crackle in the rubbing surface image quantity and length it Afterwards, in addition to：Whether the quantity for the crackle for judging to obtain exceedes amount threshold, and/or whether the length of the crackle exceedes length Threshold value；In the case where the judgment result is yes, amount shipped out warning information and/or length warning information.
- 5. according to the method for claim 1, it is characterised in that the friction of the brake disc on to the track train When face carries out the imaging acquisition rubbing surface image, in addition to：The thickness of the rubbing surface of the brake disc is measured using laser range finder, obtains abrasion loss in the middle part of the rubbing surface With the edge warping deflection of the rubbing surface.
- 6. according to the method for claim 5, it is characterised in that the brake disc is rubbed using the laser range finder The thickness in wiping face measures, and obtains in the middle part of the rubbing surface after the edge warping deflection of abrasion loss and the rubbing surface, Also include：Whether abrasion loss exceedes middle part abrasion loss threshold value in the middle part of the rubbing surface for judging to obtain, and/or the edge warping becomes Whether shape amount exceedes edge warping deflection threshold value；In the case where the judgment result is yes, middle part abrasion warning information and/or edge warping deformation warning information are sent.
- A kind of 7. crack detection device, it is characterised in that including：Image-forming module, rubbing surface image is obtained for carrying out imaging to the rubbing surface of the brake disc on track train；First identification module, for identifying the crackle in the rubbing surface image；Detection module, for being examined using Sobel operators and Canny operators to the edge of the crackle in the rubbing surface image Survey the quantity and length for obtaining the crackle in the rubbing surface image.
- 8. device according to claim 7, it is characterised in that first identification module, be additionally operable to according to the crackle The difference of characteristics of image on the rubbing surface image, the crackle in the rubbing surface image is identified, wherein, the figure As feature includes at least one of：Gray scale, color, and texture.
- 9. device according to claim 7, it is characterised in that also include：Second identification module, for identifying the edge of the crackle in the rubbing surface image；Processing module, for using morphology processing to the edge of identification, obtain the crackle for eliminating pseudo-edge.
- 10. device according to claim 7, it is characterised in that also include：Whether the first judge module, the quantity of the crackle for judging to obtain exceed amount threshold, and/or the crackle Whether length exceedes length threshold；First alarm module, in the case of being in the judged result of judge module, amount shipped out warning information and/or length Spend warning information.
- 11. device according to claim 7, it is characterised in that also include：Measurement module, the rubbing surface for the brake disc on to the track train carry out imaging and obtain the rubbing surface During image, the thickness of the rubbing surface of the brake disc is measured using laser range finder, obtains and is ground in the middle part of the rubbing surface The edge warping deflection of consumption and the rubbing surface.
- 12. device according to claim 11, it is characterised in that also include：Second judge module, whether exceed middle part abrasion loss threshold value for abrasion loss in the middle part of the rubbing surface that judges to obtain, and/ Or whether the edge warping deflection exceedes edge warping deflection threshold value；Second alarm module, in the case of being in the judged result of second judge module, send middle part abrasion and accuse Alert information and/or edge warping deformation warning information.
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| CN201710711073.5A CN107478658A (en) | 2017-08-18 | 2017-08-18 | Crack detecting method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974567A (en) * | 2019-04-30 | 2019-07-05 | 南京铁道职业技术学院 | Rolling stock brake disc multifunctional examiner |
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