CN109724557A - A kind of method of nondestructive measurement power cable conductor cross-sectional area - Google Patents
A kind of method of nondestructive measurement power cable conductor cross-sectional area Download PDFInfo
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- CN109724557A CN109724557A CN201910172878.6A CN201910172878A CN109724557A CN 109724557 A CN109724557 A CN 109724557A CN 201910172878 A CN201910172878 A CN 201910172878A CN 109724557 A CN109724557 A CN 109724557A
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Abstract
The invention discloses a kind of methods of nondestructive measurement power cable conductor cross-sectional area, segment is cut perpendicular to cable central axes to be detected, the overlap at new section is physically cleared up using ferric chloride solution auxiliary, the high-definition image of cross section is taken with apparatus for making a video recording again, since cable copper product is different with its clad imaging gray scale, the number that we calculate copper product imaging region picture point just can obtain the cross-sectional area of conductor.This method operation is convenient, and accuracy is high, and will not cause to damage to detected object, has huge economic benefit.
Description
Technical field
The invention belongs to high-voltage technology, cable detection and Application Optics fields, more particularly, to a kind of nondestructive measurement
The method of power cable conductor cross-sectional area.
Background technique
In modern society, electric energy is industrial production and the indispensable power of people's lives.Power cable be conveying electric energy,
The equipment that must be used during manufacture electrical equipment is the necessity in the following electrified and informationized society.Power cable
Also it is widely used among the engineering construction in China, line cable industry sales volume reaches 1.2 trillion yuans within 2014.
The development of cable industries and Chinese national economy is closely related, and at this stage there is also many problems, China's cable is produced
Although industry total productive capacity is very high, product structure is extremely unreasonable, and corporate boss will produce the low mesolow cable of added value, life
Has there is surplus in production capacity power, and Market competition, industry production concentration degree is low, and small enterprise stands in great numbers.By 5 the end of month in 2016, I
In 5,000,000 yuan or more enterprises close to 4000, market share shared by maximum enterprise only exists the output value in state's cable industries
1% to 2%.
Since the overwhelming majority of cable manufacturing enterprise is small-scale enterprise, dog-eat-dog between these enterprises, often for
Higher profit and use inferior materials and turn out substandard goods, when some large projects are using these cables not up to standard, once go wrong
It is easy to the consequence of bringing on a disaster property.
One important indicator of cable detection link is the cross-sectional area of conductor, conductor cross-sectional area and cable D.C. resistance
It is related to current-carrying capacity.There are mainly two types of traditional means: weight method and measurement DC resistance method.Weight method needs to intercept several meters long
Power cable, it is contemplated that power cable is at high cost, and the sale and use of power cable are seriously affected after cutting, and this method uses
It is less.Using D.C. resistance it is counter push away conductor cross-sectional area to cable destroy it is smaller, but conductor DC resistance also with the length of cable
Degree is related, some producers play tricks simultaneously on conductor area and length, and this method can missing inspection in this case.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of reasonable in design
The method of nondestructive measurement power cable conductor cross-sectional area.
Technical solution used by the present invention solves the above problems is: a kind of nondestructive measurement power cable conductor cross-sectional area
Method, it is characterised in that: the following steps are included:
One section of cable is cut down perpendicular to cable central axes from whole section of cable to be measured, so that the head of whole section of cable of electricity to be measured
End section is smooth；
The smooth cut cable in head end section of cable is immersed in progress conductor edge burr processing in ferric chloride solution,
For twisted cable after above-mentioned steps processing, the conductor metal in twisted wire gap is removed using fine needle or blade and is considered to be worth doing.
The image of cable cross-section is vertically obtained with the cross-section of cable using apparatus for making a video recording；
It is different from the gray scale of clad according to conductive region in image to the image for obtaining cable cross-section, at image
The number N that software calculates pixel shared by conductor gray scale is managed, the imaging parameters of the image of cable cross-section are obtained according to step (3)
The real area s for calculating the image single pixel point of cable cross-section, to obtain the transversal practical gross area S=of cable conductor
Ns。
The method of nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: described
Interception cable be less than 1cm.
The method of nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: described
Image processing software be Photoshop or ImageJ.
The method of nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: chlorination
Ferrous solution concentration is not less than 3mol/L, and handles the time as 20-30min.
Further, apparatus for making a video recording described in step (3) includes lens barrel, objective lenses, imaging lens and photosensitive CCD, institute
Objective lenses, imaging lens and the photosensitive CCD stated is successively set in lens barrel, the transparent plane of the objective lenses, institute
Light compensating lamp is provided in the lens barrel stated, the light compensating lamp is arranged between objective lenses and imaging lens, and the photosensitive CCD connects
The picture signal that connecing image processing circuit will acquire is converted into image data, and it is transversal that the objective lenses fit in acquisition cable
Face setting.
Further, the cable and apparatus for making a video recording are arranged in detection platform, the detection platform include base station,
Cable fixing part and apparatus for making a video recording fixed frame, the cable fixed mount plate the first limit block and the second limit block are described
The first limit block and the second limit block in opposition be slidably arranged on base station, the board the first limited block and second limit
The medium position of position block is provided with the through-hole for wearing cable, and the apparatus for making a video recording fixed frame includes several slide bars, described
Several upright bars it is perpendicular be fixed on base station upper surface, the sleeve survey of the lens barrel of the apparatus for making a video recording is slidably located in upright bar
On, the sleeve is provided with fixation hole, and fixing bolt is provided with fixation hole and contacts with corresponding upright bar fitting, so that sleeve
Opposite upright bar position is fixed.
Further, the base station is provided with for being slidably arranged in sliding slot, first limited block and the second limit
The bottom of block is provided with the sliding block that cooperation is slidably arranged in sliding slot, and the side of the sliding block is provided with perforation, the base station
Bottom be fixedly installed slide bar, the sliding block of the first limit block and the second limit block passes through perforation sliding respectively and is threaded through
On slide bar, the other side of the sliding block is provided with screw hole, and the bottom corresponding position rotation of the base station is provided with adjusting rod,
The both ends of the adjusting rod are provided with the threaded post with the cooperation of the screw hole of the sliding block of the first limit block and the second limit block, so that
Adjusting rod rotation, the first limit block and the second limit block of two sides synchronize force close or remote from.
Further, the first limit block and the second limit block are provided in symmetrical arc bump, two groups of arcs
Convex block is arranged and is set in distance in side, and the arc bump is contacted with the oversheath wall surface of cable.
Further, the bottom of the pedestal is provided with the first fixed block, first is provided in first fixed block
Bearing, the outer ring of the first bearing are fixed with the first fixed block, and adjusting rod is threaded through first bearing inner ring and wall surface and its
Fixed, the adjusting rod is arranged with the first helical gear, and first helical gear is equipped with the second helical gear, and first tiltedly
Gear and the second helical gear are intermeshed, and second helical gear, which is arranged, to be fixed on the rotating shaft, the bottom of the pedestal
It is provided with the second fixed block, second bearing, the outer ring of the second bearing and second are provided in second fixed block
Fixed block is fixed, and the rotation axis is threaded through its wall surface on the inner ring of second bearing and is secured to, the rotation axis connection
It is provided with rotational handle, the axis of the vertical line and apparatus for making a video recording at line midpoint in the middle part of the first limit block and the second limit block
Line is overlapped.
It keeps a foothold further, the base bottom is provided with support, the support is kept a foothold to be arranged with ground-contacting position
There is rubber antiskid pad
Compared with prior art, the present invention having the following advantages that and effect: the present invention passes through apparatus for making a video recording and shoots section
Image, since cable conductor material is different with its clad imaging gray scale, we calculate imaging region inner conductor portion picture
The number of point just can obtain the area of conductor.This method is easy to operate, and accuracy is high, and can detect traditional means can not be handled not
Qualified product, and cable will not be caused to damage, there is high economic benefit, while providing electric for nondestructive measurement electric power
Image is fixed and shot to the cable of cable conductor cross sectional area step, easy to operate, is conducive to simple flow, guarantees stabilized structure,
Measurement accuracy is effectively ensured.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the method for nondestructive measurement power cable conductor cross-sectional area of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of apparatus for making a video recording of the embodiment of the present invention.
Fig. 3 is the black white image after cable conductor of embodiment of the present invention section has been handled.
Fig. 4 is the structural schematic diagram at the top of detection platform of the embodiment of the present invention.
Fig. 5 is the structural schematic diagram of detection platform of embodiment of the present invention bottom.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to Fig. 1-Fig. 5, non-destructive testing technology can accurately measure 4 conductor cross sectional area of cable in the present embodiment, perpendicular to
Segment is cut in 4 central axes of detection cable, so that section is smooth, is physically cleared up at new section using ferric chloride solution auxiliary
Overlap, principle is: Cu+2FeCl3=2FeCl2+CuCl2, therefore the capillary overlap in 4 section of cable can lead in a short time
Superchlorination ferrous solution is eliminated, to obtain more smooth section, the image in section is shot by apparatus for making a video recording, due to electricity
4 conductor material of cable is different with its clad imaging gray scale, therefore we calculate the number of imaging region inner conductor portion picture point just
It can obtain the area of conductor.This method is easy to operate, and accuracy is high, can detect the rejected product that traditional means can not be handled, and
And cable 4 will not be caused to damage, there is high economic benefit.
In order to facilitate understanding, only show part related to the embodiment of the present invention, specific steps are as follows:
(1) segment cable 4 is cut down perpendicular to 4 central axes of cable；In present example implementation process, detection cable 4 is
10kV extrusion insulating power cable 4 cuts down segment (1-2cm) at one end；
(2) 4 section of cable is handled with 3mol/L ferric chloride solution to remove the overlap of conductor edge, the processing time is 20-
30min.The copper scale at gap is cleaned out with blade again；
(3) image in 4 section of cable is taken using apparatus for making a video recording, Fig. 2 illustrates apparatus for making a video recording used in the present invention and shows
It is intended to, with the such related optical parameter of apparatus for making a video recording in the present embodiment are as follows: image ratio m=1.7, apparatus for making a video recording pixel 10,000,000,
Single pixel size is.
(4) image obtained using ImageJ processing shooting, place different with its clad area grayscale value according to copper product
Reason is artwork master, and copper product is shown in white area in Fig. 3.
(5) statistics black region pixel number is that obtain the sectional area of copper product be S=Ns=160.67, according to GB/
The area of weight method precise measurement as defined in T3048.2-2007 is S '=161.80, is no more than 1% by both verifyings difference.
It can be seen that this method can reach high precision in measurement 4 conductors cross of cable.
Apparatus for making a video recording described in step (3) includes lens barrel 11, objective lenses 12, imaging lens 13 in specific the present embodiment
And photosensitive CCD14, the objective lenses 12, imaging lens 13 and photosensitive CCD14 are successively set in lens barrel 11, described
The transparent plane of objective lenses 12, light compensating lamp is provided in the lens barrel 11, the light compensating lamp is arranged in objective lenses
Between 12 and imaging lens 13, the picture signal that the photosensitive CCD14 connection image processing circuit will acquire is converted into picture number
According to the objective lenses 12, which fit in, obtains the setting of 4 cross section of cable, and the cable 4 and apparatus for making a video recording setting are being examined
It surveys on platform, the detection platform includes base station 2,4 fixing piece of cable and apparatus for making a video recording fixed frame, and the cable 4 is solid
Determine frame plate block the first limited block 31 and the second limited block 32, first limited block 31 and the second limited block 32 are in opposition sliding
It is arranged on base station 2, the board is provided in the medium position of the first limited block 31 and the second limited block 32 for wearing
The through-hole 24 of cable 4, the apparatus for making a video recording fixed frame include several slide bars 33, and several upright bars 41 are perpendicular to be fixed on
The survey of sleeve 42 of 2 upper surface of base station, the lens barrel 11 of the apparatus for making a video recording is slidably located in upright bar 41, and the sleeve 42 is set
It is equipped with fixation hole, fixing bolt 43 is provided with fixation hole and contacts with corresponding upright bar 41 fitting, so that sleeve 42 is with respect to upright bar
41 positions are fixed, and the base station 2 is provided with for being slidably arranged in sliding slot 21, first limited block 31 and the second limit
The bottom of block 32 is provided with the sliding block 32 that cooperation is slidably arranged in sliding slot 21, and the side of the sliding block 32 is provided with perforation, institute
The bottom for the base station 2 stated is fixedly installed slide bar 33, the difference of sliding block 32 of first limited block 31 and the second limited block 32
By perforating, sliding is threaded through on slide bar 33, and the other side of the sliding block 32 is provided with screw hole, the bottom pair of the base station 2
Position rotation is answered to be provided with adjusting rod 34, the both ends of the adjusting rod 34 are provided with and the first limited block 31 and the second limited block
The threaded post of the screw hole cooperation of 32 sliding block 32, so that adjusting rod 34 rotates, the first limited block 31 of two sides and the second limited block
32 synchronize force close or remote from, first limited block 31 and the second limited block 32 are provided in symmetrical arc bump 311,
Two groups of arc bumps 311 are arranged and are set in distance in side, and the oversheath wall surface of the arc bump 311 and cable 4 connects
Touching, the bottom of the pedestal is provided with the first fixed block 341, is provided with first bearing in first fixed block 341
342, the outer ring of the first bearing 342 and the first fixed block 341 are fixed, and adjusting rod 34 is threaded through 342 inner ring of first bearing
And wall surface is secured to, the adjusting rod 34 is arranged with the first helical gear 342, and first helical gear 342 is equipped with
There is the second helical gear 351, the first helical gear 342 and the second helical gear 351 are intermeshed, and second helical gear 351 is arranged
It is fixed in rotation axis 35, the bottom of the pedestal is provided with the second fixed block 352, sets in second fixed block 352
It is equipped with second bearing 353, the outer ring of the second bearing 353 and the second fixed block 352 are fixed, and the rotation axis 35 is worn
Its wall surface is secured on the inner ring of second bearing 353, and the rotation axis 35 is connected with rotational handle 36, described
The vertical line at 32 middle part line midpoint of the first limited block 31 and the second limited block is overlapped with the central axes of apparatus for making a video recording, the pedestal
Bottom is provided with support and keeps a foothold 22, and the support, which is kept a foothold, 22 is provided with rubber antiskid pad 23, this detection with ground-contacting position
The fixation of cable 4 and apparatus for making a video recording that platform is used to intercept, it is easy to operate, as shown in Figure 4,5, by the cable of plane taken
4 are threaded through on through-hole 24 by 2 bottom of base station, are placed on base station 2, and are approached by the first limited block 31 with the second limited block 32
The outside wall surface of cable 4 makes its limit, and section that when limit guarantees cable 4 and base station 2 are in level, further through this embodiment
Adjusting rod 34 rotate may make the first limited block 31 and the second limited block 32 synchronize approach the cable 4 of clamping interception, due to described
The first limited block 31 and the second limited block 32 middle part line midpoint vertical line and apparatus for making a video recording central axes (as lens barrel 11
Central axes) it is overlapped, then make when cable 4 clamps, the central axes of cable 4 are overlapped with the central axes of apparatus for making a video recording, because
This is effectively guaranteed the accuracy of the picture ratio of acquisition, while without extra adjustment, easy to use, is conducive to improve
The precision of measurement, the structure of rotation axis 35 is used in the present embodiment, so that easily facilitating the rotation of adjustment axis, is easy to use.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can make various modifications or additions to the described embodiments or by a similar method
Substitution, content without departing from description of the invention or beyond the scope defined by this claim should belong to this
The protection scope of invention.
Claims (10)
1. a kind of method of nondestructive measurement power cable conductor cross-sectional area, it is characterised in that: the following steps are included:
(1) one section of cable is cut down perpendicular to cable central axes from whole section of cable to be measured, so that the head of whole section of cable of electricity to be measured
End section is smooth；
(2) the smooth cut cable in head end section of cable is immersed in progress conductor edge burr processing in ferric chloride solution,
For twisted cable after above-mentioned steps processing, the conductor metal in twisted wire gap is removed using fine needle or blade and is considered to be worth doing.
(3) image of cable cross-section is vertically obtained with the cross-section of cable using apparatus for making a video recording；
(4) different from the gray scale of clad according to conductive region in image to the image for obtaining cable cross-section, at image
The number N that software calculates pixel shared by conductor gray scale is managed, the imaging parameters of the image of cable cross-section are obtained according to step (3)
The real area s for calculating the image single pixel point of cable cross-section, to obtain the transversal practical gross area S=of cable conductor
Ns。
2. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: described
The cable of interception is less than 1cm.
3. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: described
Image processing software is Photoshop or ImageJ.
4. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: iron chloride
Solution concentration is not less than 3mol/L, and handles the time as 20-30min.
5. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 1, it is characterised in that: step
(3) apparatus for making a video recording described in includes lens barrel, objective lenses, imaging lens and photosensitive CCD, the objective lenses, imaging lens
Head and photosensitive CCD are successively set in lens barrel, the transparent plane of the objective lenses, are provided with light filling in the lens barrel
Lamp, the light compensating lamp are arranged between objective lenses and imaging lens, and the photosensitive CCD connection image processing circuit will acquire
Picture signal be converted into image data, the objective lenses, which fit in, obtains cable cross-section setting.
6. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 5, it is characterised in that: described
Cable and apparatus for making a video recording are arranged in detection platform, and the detection platform includes base station, cable fixing part and image pick-up device
Material fixed frame, the cable fixed mount plate the first limit block and the second limit block, first limited block and the second limit
Position block is slidably arranged on base station in opposition, and the board is provided in the medium position of the first limit block and the second limit block
For wearing the through-hole of cable, the apparatus for making a video recording fixed frame includes several slide bars, the perpendicular fixation of several upright bars
In base station upper surface, the sleeve survey of the lens barrel of the apparatus for making a video recording is slidably located in upright bar, and the sleeve is provided with solid
Determine hole, fixing bolt is provided with fixation hole and contacts with corresponding upright bar fitting, so that sleeve is fixed with respect to upright bar position.
7. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 6, it is characterised in that: described
Base station is provided with for being slidably arranged in sliding slot, and the bottom of the first limit block and the second limit block is provided with cooperation and slides
The dynamic sliding block that sliding slot is arranged in, the side of the sliding block are provided with perforation, and the bottom of the base station is fixedly installed slide bar, institute
The sliding block for the first limit block and the second limit block stated pass through respectively perforation sliding is threaded through on slide bar, the sliding block it is another
Side is provided with screw hole, and the bottom corresponding position rotation of the base station is provided with adjusting rod, the both ends setting of the adjusting rod
There is the threaded post with the cooperation of the screw hole of the sliding block of the first limit block and the second limit block, so that adjusting rod rotates, the first of two sides
Limited block and the second limited block synchronize force close or remote from.
8. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 7, it is characterised in that: described
The first limit block and the second limit block are provided in symmetrical arc bump, and two groups of arc bumps are arranged in side and in interval
Setting, the arc bump are contacted with the oversheath wall surface of cable.
9. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 8, it is characterised in that: described
The bottom of pedestal is provided with the first fixed block, and first bearing is provided in first fixed block, the first bearing
Outer ring is fixed with the first fixed block, and adjusting rod is threaded through first bearing inner ring and wall surface is secured to, and the adjusting rod is arranged
There is the first helical gear, first helical gear is equipped with the second helical gear, and the first helical gear and the second helical gear are mutual
Engagement, second helical gear, which is arranged, to be fixed on the rotating shaft, and the bottom of the pedestal is provided with the second fixed block, described
The second fixed block in be provided with second bearing, the outer ring of the second bearing is fixed with the second fixed block, the rotation
Axis is threaded through its wall surface on the inner ring of second bearing and is secured to, and the rotation axis is connected with rotational handle, described
The vertical line at line midpoint is overlapped with the central axes of apparatus for making a video recording in the middle part of the first limit block and the second limit block.
10. the method for nondestructive measurement power cable conductor cross-sectional area according to claim 7, it is characterised in that: described
Base bottom be provided with support and keep a foothold, the support, which is kept a foothold, is provided with rubber antiskid pad with ground-contacting position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910172878.6A CN109724557A (en) | 2019-03-07 | 2019-03-07 | A kind of method of nondestructive measurement power cable conductor cross-sectional area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910172878.6A CN109724557A (en) | 2019-03-07 | 2019-03-07 | A kind of method of nondestructive measurement power cable conductor cross-sectional area |
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| Publication Number | Publication Date |
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| CN109724557A true CN109724557A (en) | 2019-05-07 |
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ID=66302116
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910172878.6A Withdrawn CN109724557A (en) | 2019-03-07 | 2019-03-07 | A kind of method of nondestructive measurement power cable conductor cross-sectional area |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715622A (en) * | 2019-09-04 | 2020-01-21 | 华中科技大学 | Cable conductor sectional area measuring method |
| CN110779486A (en) * | 2019-11-05 | 2020-02-11 | 中铁十一局集团电务工程有限公司 | Error correction method and system for cable conductor detection |
| CN110827311A (en) * | 2019-11-05 | 2020-02-21 | 中铁十一局集团电务工程有限公司 | Cable conductor sectional area measuring method and system based on imaging method |
| CN110927159A (en) * | 2019-11-12 | 2020-03-27 | 国网天津市电力公司电力科学研究院 | Method for rapidly detecting conductor core compression coefficient of distribution network cable |
| CN115791808A (en) * | 2023-01-09 | 2023-03-14 | 江苏云舟通信科技有限公司 | Cable inspection data wireless communication transmission platform |
-
2019
- 2019-03-07 CN CN201910172878.6A patent/CN109724557A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715622A (en) * | 2019-09-04 | 2020-01-21 | 华中科技大学 | Cable conductor sectional area measuring method |
| CN110779486A (en) * | 2019-11-05 | 2020-02-11 | 中铁十一局集团电务工程有限公司 | Error correction method and system for cable conductor detection |
| CN110827311A (en) * | 2019-11-05 | 2020-02-21 | 中铁十一局集团电务工程有限公司 | Cable conductor sectional area measuring method and system based on imaging method |
| CN110827311B (en) * | 2019-11-05 | 2023-07-21 | 中铁十一局集团电务工程有限公司 | Imaging method-based cable conductor sectional area measurement method and system |
| CN110927159A (en) * | 2019-11-12 | 2020-03-27 | 国网天津市电力公司电力科学研究院 | Method for rapidly detecting conductor core compression coefficient of distribution network cable |
| CN115791808A (en) * | 2023-01-09 | 2023-03-14 | 江苏云舟通信科技有限公司 | Cable inspection data wireless communication transmission platform |
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