CN207365909U - Contact line abrasion automatic measurer based on machine vision - Google Patents
Contact line abrasion automatic measurer based on machine vision Download PDFInfo
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- CN207365909U CN207365909U CN201721286739.9U CN201721286739U CN207365909U CN 207365909 U CN207365909 U CN 207365909U CN 201721286739 U CN201721286739 U CN 201721286739U CN 207365909 U CN207365909 U CN 207365909U
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- contact line
- wearing course
- machine vision
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Abstract
A kind of contact line abrasion automatic measurer based on machine vision is the utility model is related to, instrument sets handled shell including side, and case surface is equipped with window；Light emitting unit is provided with inside the housing, light emitting unit sends light beam after reflector element, it is incident upon by the window cover type on detected contact line wearing course, the reflected light of contact line wearing course is detected along backtracking to the reflector element, after reflector element, received and be imaged by telecentric lens, industrial camera shooting is described to be imaged and is sent to processor, processor calculates contact line wearing course width according to the imaging, according to the geometrical relationship between wearing course width and abrasion loss, corresponding contact line abrasion loss is calculated.
Description
Technical field
It the utility model is related to a kind of contact line abrasion automatic measurer based on machine vision.
Background technology
Current contact net application is distributed mainly on railway territory and subway field, is used in railway territory mainly soft
Property contact net, and subway field is no axial tensile force using rigid contact net, the great advantage of rigid contact net, does not deposit
In the possibility of broken string, in addition with the advantages that structure is relatively easy, repair and maintenance workload is small.Most domestic subway is all at present
Using rigid contact net, but with the increase of running time, bow net closes between some district train flashlights bow and contact line
It is bad so that contact line locally wears away serious phenomenon and becomes increasingly conspicuous, and contact line abrasion may cause contact line to be broken when serious
Split, so as to further be degrading pantograph contact line relation.
Contact line in subway in rigidity, flexibility with railway territory contact line in addition to having difference, and also there are a weight
Greatly difference lies in, the contact line in subway needs to clamp by bus-bar, at present detect subway in contact line abrasion when, it is necessary to
Contact line is disassembled from bus-bar, is detected using the contact method of vernier caliper, this method automation is not
By force, inefficiency, it is therefore necessary to study a kind of without contact line to be unloaded to the method that can complete detection from bus-bar.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of contact line abrasion based on machine vision
Automatic measurer, can use contactless measurement method, complete the detection of contact line abrasion loss in subway.
The technical solution of the utility model is：
A kind of contact line abrasion automatic measurer based on machine vision, including：
Side sets handled shell, and case surface is equipped with window；
Light emitting unit is provided with inside the housing, and light emitting unit sends light beam after reflector element, passes through the window
Mouthful cover type is incident upon on detected contact line wearing course, is detected the reflected light of contact line wearing course along backtracking to described
Reflector element, after reflector element, is received and is imaged by telecentric lens, and industrial camera shooting is described to be imaged and be sent to processing
Device, processor calculate contact line wearing course width according to the imaging, are closed according to the geometry between wearing course width and abrasion loss
System, calculates corresponding contact line abrasion loss.
Telecentric lens used in the utility model have the constant characteristic of imaging enlargement ratio, in measurement contact line mill
During consumption, since contact line abrasion loss is different, it is also different to cause the object distance between wearing course and camera lens.General camera lens
Enlargement ratio with object distance change and change, be not suitable for accurately measuring wearing course width.The utility model utilizes telecentricity
Light path characteristic, ensures the interference that the measurement result of wearing course developed width changes from object distance.
The utility model can play the role of light path folding using reflector element, effectively reduce accessible line measuring instrument
Overall height, carries and operates easy to survey crew.
Further, the side for window being equipped with the case surface is provided with locating piece, for fixing contact line
Bus-bar surface is bonded, and keeps posture during apparatus measures.
Further, the central axis of the light emitting unit and the optical axis of telecentric lens overlap in setting range.
Further, the light emitting unit uses hollow circulating type light source.
Further, the processor uses embeded processor.
The beneficial effects of the utility model：
The utility model proposes contact line measurement of wear instrument be a kind of contactless self-operated measuring unit, measurement process
The degree of automation height and high certainty of measurement.
Telecentric lens used in instrument have the constant characteristic of imaging enlargement ratio.During measuring contact line, by
Different in contact line abrasion loss, it is also different to cause the object distance between wearing course and camera lens.The enlargement ratio of general camera lens with
Object distance change and change, be not suitable for accurately measuring wearing course width.The utility model utilizes telecentric beam path characteristic, ensures
The interference that the measurement result of wearing course developed width changes from object distance.
Reflector element used in instrument plays the role of light path folding, and it is whole can effectively to reduce contact line measuring device
The height of body, carries and operates easy to survey crew.
The optical axis of circulating type light source center axis and telecentric lens essentially coincides, and this mounting means ensures annular light source
Emergent light uniform irradiation is on contact line wearing course.
The utility model proposes this instrument in use, by the locating piece of measuring instrument and subway line bus-bar
Closely adhere to together, the industrial camera in measuring device can understand the image for shooting contact line wearing course, locate by analysis
The abrasion numerical quantity of contact line can be obtained after reason image.In addition to wearing away numerical quantity, measuring instrument can also be contacted
Line remaining height, contact line width and percentage of wear these three important parameters.
Brief description of the drawings
Fig. 1 is the utility model contact line measurement of wear instrument structure diagram；
Fig. 2 uses example for the utility model one.
Wherein, 1- tool housings, 2- industrial cameras, 3- instrument handles, 4- annular light sources, 5- speculums, 6- watch windows,
7- telecentric lens, 8- locating pieces, 9- bus-bars, 10- contact lines, 11- instrument bodies.
Embodiment：
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
It is noted that described further below is all illustrative, it is intended to provides further instruction to the application.It is unless another
Indicate, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As shown in Figure 1, the utility model proposes a kind of exemplary embodiments be it is a kind of based on machine vision contact line mill
Automatic measurer, including tool housing 1 are consumed, handle 3 is equipped with the side of tool housing 1, and in the opposite shell side of handle 3
Surface is equipped with watch window 6.
Light emitting unit is internally provided with shell 1, and light emitting unit is used as using annular light source 4 in the present embodiment,
Other hollow circulating type light sources can be used, by telecentric lens 7 around encirclement wherein in dummy section.Annular light source 4 goes out
Penetrating light must be irradiated on contact line wearing course after reflector element by the window cover type on tool housing 1, uniformly be shone
Bright wearing course is imaged by telecentric beam path in camera 2, then using embeded processor analyzing and processing wearing course image simultaneously
Contact line wearing course width is obtained, so as to calculate contact line abrasion loss.
In the present embodiment, reflector element uses speculum 5, but be not limited to speculum or other have reflection work(
The optical element of energy.
Telecentric lens 7 used in the present embodiment have the constant characteristic of imaging enlargement ratio, in measurement contact line mill
During consumption, since contact line abrasion loss is different, it is also different to cause the object distance between wearing course and camera lens.General camera lens
Enlargement ratio with object distance change and change, be not suitable for accurately measuring wearing course width.And telecentric beam path is used, utilize
It is imaged the constant characteristic of enlargement ratio, you can to ensure interference that the measurement result of wearing course developed width changes from object distance.
Speculum 7 in the present embodiment plays the role of light path folding, can effectively reduce contact line measuring device entirety
Height, easy to survey crew carry and operate.
Annular light source 4 needs to be fixed on device pedestal, and the optical axis of 4 central axis of annular light source and telecentric lens 7
Essentially coincide, can ensure the emergent light uniform irradiation of annular light source on contact line wearing course using this mounting means.
As shown in Fig. 2, the one kind for giving the utility model uses example, installed on subway contact line attrition apparatus shell
There is locating piece 8, locating piece 8 can be fitted closely with 9 surface of bus-bar of fixed contact line 10, so that when ensureing that instrument 11 measures
Correct posture.At work, survey crew closely pastes the locating piece 8 of measuring instrument 11 with subway line bus-bar 9 to instrument 11
It is combined together, it is necessary to press measurement start button when measuring abrasion loss, then the camera 2 in measuring device shoots contact line wearing course
Image, can obtain the abrasion numerical quantity of contact line by analysis after processing image.
When carrying out contact line abrasion measurement using above-mentioned instrument 11, core is to be analyzed using image, tool
Body analysis comprises the following steps：
The light beam cover type that light emitting unit is sent is incident upon on detected contact line wearing course, and light beam is through being detected contact
Received and be imaged by telecentric lens 7 after the reflection of line wearing course, using industrial camera 2 or other storage medium recorded described imagings,
Obtain being detected contact line wearing course width in image using image detection algorithm, according to wearing course width and abrasion loss it
Between geometrical relationship, calculate corresponding contact line abrasion loss.
Using image detection algorithm processing image in the present embodiment, then obtaining contact line abrasion loss includes following step
Suddenly：
(1) binary conversion treatment is carried out to contact line image；
(2) connected domain analysis is carried out to the image after binary conversion treatment, and determines to belong to according to connected domain area features and connect
Touch the connected domain of line wearing course；
(3) profile for the method processing wearing course connected domain approached using parallelogram, and obtain four of quadrangle
The coordinate on vertex；
(4) the linear equation L1 and L2 on wearing course both sides border are gone out according to the four of quadrangle vertex primary Calculations, then
Two air line distances are counted on respectively less than the profile point of 0.5 pixel so as to form point set P1 and P2；
(5) wearing course absorbing boundary equation is gone out using least square Accurate Curve-fitting and calculates the distance between two straight lines, finally
Wearing course width is calculated according to the amplification coefficient of optical system.
According to the geometrical relationship between wearing course width and abrasion loss, corresponding 10 abrasion loss of contact line is calculated with more
Kind of method, the present embodiment calculate the abrasion loss of contact line 10 using chord length bow supreme people's court according to the radius of contact line 10.
Specifically according to the following formula：
R2=D2+(R-h)2
Wherein, R is known contact line radius, and D is the contact line wearing course width that measurement is drawn, h is the mill that band is asked
Consumption.Pass through above-mentioned formula, it is possible to obtain contact line abrasion loss h.
On the basis of contact line abrasion loss is obtained, by known 10 radius of contact line, using the simple method that counts
10 remaining height of place's contact line, 10 width of contact line and percentage of wear can be calculated.
The utility model proposes contact line measurement of wear instrument 11 compared with prior art for be it is a kind of it is contactless from
Dynamic measuring device, measurement process the degree of automation height and high certainty of measurement.
Telecentric lens 7 used in instrument 11 have the constant characteristic of imaging enlargement ratio.Measure 10 process of contact line
In, since contact line abrasion loss is different, it is also different to cause the object distance between wearing course and camera lens.The times magnification of general camera lens
Rate changes as object distance changes, and is not suitable for accurately measuring wearing course width.The utility model utilizes telecentric beam path characteristic,
Ensure the interference that the measurement result of wearing course developed width changes from object distance.
The utility model proposes this instrument 11 in use, by the locating piece 8 and subway line of measuring instrument 11
Bus-bar 9 closely adheres to together, and the industrial camera 2 in measuring device can understand the image for shooting contact line wearing course, warp
The abrasion numerical quantity of contact line 10 can be obtained after crossing analyzing and processing image.In addition to wearing away numerical quantity, measuring instrument 11 is also
It can obtain the remaining of contact line 10 height, 10 width of contact line and percentage of wear these three important parameters.
The foregoing is merely the preferred embodiment of the application, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (5)
- A kind of 1. contact line abrasion automatic measurer based on machine vision, it is characterised in that including：Side sets handled shell, and case surface is equipped with window；Light emitting unit is provided with inside the housing, and light emitting unit sends light beam after reflector element, is covered by the window Lid formula is incident upon on detected contact line wearing course, is detected the reflected light of contact line wearing course along backtracking to the reflection Unit, after reflector element, is received and is imaged by telecentric lens, and industrial camera shooting is described to be imaged and be sent to processor, is located Manage device and contact line wearing course width is calculated according to the imaging, according to the geometrical relationship between wearing course width and abrasion loss, meter Calculate corresponding contact line abrasion loss.
- 2. the contact line abrasion automatic measurer according to claim 1 based on machine vision, it is characterised in that in institute State side of the case surface equipped with window and locating piece is installed, for being bonded with the bus-bar surface of fixed contact line, keep instrument Posture when device measures.
- 3. the contact line abrasion automatic measurer according to claim 1 based on machine vision, it is characterised in that described The central axis of light emitting unit is overlapped with the optical axis of telecentric lens in setting range.
- 4. the contact line abrasion automatic measurer according to claim 1 based on machine vision, it is characterised in that described Light emitting unit uses hollow circulating type light source.
- 5. the contact line abrasion automatic measurer according to claim 1 based on machine vision, it is characterised in that described Processor uses embeded processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721286739.9U CN207365909U (en) | 2017-09-30 | 2017-09-30 | Contact line abrasion automatic measurer based on machine vision |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721286739.9U CN207365909U (en) | 2017-09-30 | 2017-09-30 | Contact line abrasion automatic measurer based on machine vision |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560545A (en) * | 2017-09-30 | 2018-01-09 | 济南蓝动激光技术有限公司 | Contact line abrasion automatic measurer and measuring method based on machine vision |
| CN110503048A (en) * | 2019-08-26 | 2019-11-26 | 中铁电气化局集团有限公司 | The identifying system and method for rigid contact net suspension arrangement |
| CN110992348A (en) * | 2019-12-10 | 2020-04-10 | 成都国铁电气设备有限公司 | Subway overhead line system abrasion measurement method and system based on 3D structured light camera |
| CN113959387A (en) * | 2021-11-24 | 2022-01-21 | 威海华菱光电股份有限公司 | Crack measuring device |
-
2017
- 2017-09-30 CN CN201721286739.9U patent/CN207365909U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560545A (en) * | 2017-09-30 | 2018-01-09 | 济南蓝动激光技术有限公司 | Contact line abrasion automatic measurer and measuring method based on machine vision |
| CN107560545B (en) * | 2017-09-30 | 2024-03-15 | 济南蓝动激光技术有限公司 | Contact line abrasion automatic measuring instrument and measuring method based on machine vision |
| CN110503048A (en) * | 2019-08-26 | 2019-11-26 | 中铁电气化局集团有限公司 | The identifying system and method for rigid contact net suspension arrangement |
| CN110992348A (en) * | 2019-12-10 | 2020-04-10 | 成都国铁电气设备有限公司 | Subway overhead line system abrasion measurement method and system based on 3D structured light camera |
| CN110992348B (en) * | 2019-12-10 | 2023-09-19 | 成都国铁电气设备有限公司 | Subway contact net abrasion measurement method and system based on 3D structured light camera |
| CN113959387A (en) * | 2021-11-24 | 2022-01-21 | 威海华菱光电股份有限公司 | Crack measuring device |
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