CN204142186U - A kind of measuring system of electric wire structure - Google Patents
A kind of measuring system of electric wire structure Download PDFInfo
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- CN204142186U CN204142186U CN201420645138.2U CN201420645138U CN204142186U CN 204142186 U CN204142186 U CN 204142186U CN 201420645138 U CN201420645138 U CN 201420645138U CN 204142186 U CN204142186 U CN 204142186U
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- electric wire
- light source
- cmos camera
- measuring system
- computing machine
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Abstract
The utility model provides a kind of measuring system of electric wire structure, comprises material supporting platform, computing machine, cmos camera, telecentric lens and LED light source; The test piece of electric wire is placed on material supporting platform, and cmos camera and telecentric lens are positioned at the upside of material supporting platform, and LED light source is positioned at the downside of material supporting platform; Telecentric lens is arranged on cmos camera; Cmos camera is connected by 1394 interfaces with computing machine; Telecentric lens and cmos camera are for obtaining the image of test piece; And cmos camera is used for the image transfer of acquisition to computing machine; LED light source is installed, for providing integrated light source for test piece towards cmos camera and telecentric lens; Computing machine is used for processing image and calculating.The utility model adopts computer auto-detection, only needs just can obtain measurement result short a few second, thus realizes the measurement of high precision, high-level efficiency and high stability.
Description
Technical field
The utility model relates to a kind of measuring system, particularly relates to a kind of measuring system of electric wire structure.
Background technology
No matter the detection method of the geometric parameter of the insulation course of electric wire and evaluation result be GB or IEC is (International Electrotechnical Commission, International Electrotechnical Commission) there is clear and definite standard, and give minimum and the highest limit, manufacturer must instruct the suitability for industrialized production of electric wire in strict accordance with this standard, to ensure the safety of product.Whether industrial and commercial and quality testing department often will be measured geometric parameters such as the thickness of insulating layer of some cables and outside dimensions, check cable qualified.Especially current, due to the introduction of high-tension cable production line, domestic many cable factories have all possessed the ability of producing high-tension cable, therefore just become more urgent to the detection of cable insulation geometric parameter.Concerning high-tension cable, the thickness of its insulation course is a very important parameter, and it directly has influence on the safety of electricity consumption.
So far, what the measurement of department to geometric parameters such as wire cable insulating layer thicknesses such as metering and calibrating still adopted is traditional manual measurement method based on mechanical projection instrument.Generally, the enlargement ratio of mechanical projection instrument, more than 10 times, projector is equipped with material supporting platform, the below of material supporting platform is provided with light power device, be fixed with pole perpendicular on material supporting platform, pole is fixed with jacking gear, jacking gear is fixed with the digital vedio recording probe of energy autozoom.Digital camera head can be driven to move up and down by rotating knob, signal of video signal in kind projects on screen in the form of images through the first-class small gourd of digital vedio recording, and in digital camera head moving process from bottom to top, projected image shown on screen also can thereupon from large to small.
For prevailing electric wire type, as measured single core round cable thickness of insulating layer, need to measure three of symmetry to point every 60 degree, record each position cable ectonexine reading, image to be readjusted to visual field central authorities after rotating 60 degree, carry out same operation again, until surveyed 6 groups of data, try to achieve the minimum value in 6 groups of data, arithmetic mean as cable insulation minimum thickness and average thickness.
But traditional projector human factor is larger, need to go to distinguish that edge is measured by human eye, there is certain error in the result value obtained like this, and repeatability is very low.Further, although this traditional measuring method measures cable insulation parameter very large optical measurement advantage, operate too loaded down with trivial details, reading is inconvenient, poor accuracy, and post-processed data have increased the weight of labour intensity especially.
In recent years, along with the develop rapidly of electronic technology, image measurement technology is developed very fast, be widely used in the technical fields such as the dimensional measurement of geometric sense, AEROSAT remote sensing survey, the Micro-dimension detection of precision component and micrometering.Further, along with advancing by leaps and bounds and digital image processing techniques day by day perfect of computer technology, high performance processor; The image pick-up card of digitized low cost; The hard disk of Large Copacity low price; High-resolution display etc., further promotes the development in image measurement field.The development trend becoming the measurement of electric wire structure that computer technology and image measurement technology are combined.
There is a product utilizing computer technology to measure electric wire structure in external KSM company, and it carries out the measurement of electric wire structure by the camera that 3 groups of pixels are up to 2,000,000 pixels.Pixel due to its camera adopted is the highest is just 2,000,000 pixels, so its sharpness is general; Further, what its camera was selected is also not telecentric lens, and therefore, its precision measured is relatively low, and measurement range is less, can only measure the electric wire of diameter at 1 ~ 75mm, and this certainly will cause the scope of application of this product to reduce.
Measure about electric wire in the world and need meet IEC60811 standard, through repeatedly finding the test of the product of KSM, it and completely goes to measure according to IEC60811 standard, and wherein, IEC60811 standard is international electric wire measurement standard.Not in accordance with IEC60811 canonical measure result out and actual be disagree, need qualification and specialty to detect occasion will to cause additional effect a lot.
Nowadays the precise requirements for all kinds of parameter is growing, original optical projection system can not meet present testing requirement, and external product all can not meet present demand on design, hardware and software, therefore to be devoted to develop a set of ratio external more advanced for the utility model, more accurate, utilize computer and technology to measure the system of electric wire structure more easily.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is the measuring system providing a kind of electric wire structure, is that complicated operation, measuring accuracy is low, the problem that measurement range is less for solving in prior art carrying out measurement to epilepsy cable.
For achieving the above object and other relevant objects, the utility model provides a kind of measuring system of electric wire structure, comprises material supporting platform and computing machine, and the measuring system of described electric wire structure also comprises: cmos camera, telecentric lens and LED light source; Wherein, the test piece of described electric wire is placed on described material supporting platform, and described cmos camera and described telecentric lens are positioned at the upside of described material supporting platform, and described LED light source is positioned at the downside of described material supporting platform; Described telecentric lens is arranged on described cmos camera; Described cmos camera is connected by 1394 interfaces with described computing machine; Described telecentric lens and described cmos camera are for obtaining the image of described test piece; And described cmos camera is used for the described image transfer of acquisition to described computing machine; Described LED light source is installed, for providing integrated light source for described test piece towards described cmos camera and described telecentric lens; Described computing machine is used for processing described image and calculating.
Alternatively, be connected by 1394B interface between described cmos camera with described computing machine.
Alternatively, described cmos camera supports hot plug.
Alternatively, described LED light source is connected by com interface with described computing machine.
Alternatively, described computing machine controls the switch of described LED light source.
Alternatively, described LED light source comprises multiple LED chip.
Alternatively, the measuring system of described electric wire structure also comprises multiple secondary light source, and secondary light source generally adopts LED chip.
As mentioned above, whether qualified the measuring system of a kind of electric wire structure of the present utility model, for measuring the geometric parameter such as thickness of insulating layer and outside dimension of electric wire, detect electric wire by these geometric parameters.Compared to traditional measuring method, use the measuring system of electric wire structure of the present utility model, adopt computer auto-detection, only need just can obtain measurement result short a few second, thus realize the measurement of high precision, high-level efficiency and high stability.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of the measuring system of a kind of electric wire structure disclosed in the utility model embodiment.
Fig. 2 is shown as the system calibrating schematic flow sheet of the measuring system of a kind of electric wire structure disclosed in the utility model embodiment.
Fig. 3 is shown as the schematic flow sheet of the concrete measuring process of the measuring system of a kind of electric wire structure disclosed in the utility model embodiment.
Fig. 4 is shown as the structural representation of the measuring system of a kind of electric wire structure disclosed in another preferred embodiment of the utility model.
Element numbers explanation
The measuring system of 100 electric wire structures
110 material supporting platforms
120 cmos cameras
130 telecentric lens
140 LED light sources
150 computing machines
160 secondary light sources
The test piece of 200 electric wires
410 operation cabinets
411 front panels
412 com interfaces
413 camera interface/1394 interface/1394B interfaces
414 light source controllers
415 camera mounts
Embodiment
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present utility model and effect easily.
Refer to Fig. 1 to Fig. 4.Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
Embodiment 1
As shown in Figure 1, present embodiment discloses a kind of measuring system 100 of electric wire structure, it is in conjunction with computer technology and image measurement technology, and utilize knowledge and the algorithm of image measurement, the data-handling capacity in conjunction with computing machine has carried out the measurement to electric wire structure.
Based on the factor of measuring accuracy, operational efficiency and equipment interface, the measuring system 100 of the electric wire structure of the present embodiment comprises material supporting platform 110, CMOS (Complementary Metal-Oxide-Semiconductor, complementary metal oxide semiconductor (CMOS)) video camera 120, telecentric lens 130, LED light source 140, computing machine 150 and multiple secondary light source 160.Wherein, material supporting platform 110 is for the test piece 200 of fixed placement electric wire; LED light source 140 is positioned at the downside of material supporting platform 110; Cmos camera 120 and telecentric lens 130 are positioned at the upside of material supporting platform 110; Telecentric lens 130 and cmos camera 120 support the use, and telecentric lens 130 is arranged on cmos camera 120; Computing machine 150 is connected with cmos camera 120; Multiple secondary light source 160 is arranged between material supporting platform 110 and telecentric lens 130.
Cmos camera 120 and telecentric lens 130 are images of test piece for obtaining electric wire.Wherein, cmos camera 120 is the vision sensors obtaining image, and optical signalling is converted to electric signal.Cmos camera 120 by the image of the test piece 200 of electric wire through lens focus on cmos image sensor, then the CMOS active pixel sensor of CMOS is utilized, each pixel can adjoin an amplifier and analog to digital conversion circuit, by the optical image information of the test piece 200 of electric wire generation current or voltage signal after opto-electronic conversion, and output to computing machine 150 place.
And, in precision optics measuring system, because ordinary optical camera lens can exist certain restraining factors, as the distortion of image, the error that visual angle is selected and caused, the problems such as the uncertainty on border are caused under inappropriate light source interference, especially the test piece 200 of the electric wire of the present embodiment cuts thin slice along the plane of the axis perpendicular with electric wire, and thin slice to be placed on microslide preparation, so test piece 200 is not exclusively in same object plane, this will certainly cause cmos camera 120 to occur parallax, these problems above-mentioned all can have influence on the precision of measurement.So the present embodiment is cmos camera 120 be equipped with telecentric lens 130, is effectively reduced by telecentric lens 130 and even eliminate these problems.Telecentric lens 130 can, in certain object distance range, make the Nonlinear magnify multiplying power obtained can not change with the change of object distance.And no matter wherein, in specific operating distance, telecentric lens 130 all can have identical enlargement ratio after again focusing, therefore telecentric lens 130 can provide superior image quality, its distortion is less than traditional tight shot, and these are all can measure electric wire structure more accurately to provide necessary condition.
In measuring system of picture, good electric light source and lighting scheme is the key of whole measuring system success or failure.Electric light source and lighting scheme cooperatively interacts, and to eliminate unnecessary shade, low contrast and mirror-reflection, enables object form image clearly; Object need the part that detects and those do not need to produce as much as possible between the part that detects significantly to distinguish, to increase contrast, give prominence to the feature of extraction, simultaneously the overall brightness wanted of also guarantee group.So the present embodiment is all equipped with light source in the both sides up and down of material supporting platform 110.The light source be positioned on the downside of material supporting platform 110 selects LED light source 140, and LED light source 140 comprises multiple LED chip.In addition, LED light source 140, in order to complete all automatic measurement, is connected with computing machine 150 by the present embodiment, by the unified on off state controlling LED light source 140 of computing machine 150.The light source being positioned at the upside of material supporting platform 110 has selected multiple secondary light source 160, and secondary light source 160 is the same with LED light source, adopt LED chip, and secondary light source 160 is also unified to control its switch by computing machine 150.And LED light source 140 and secondary light source 160 also can by computing machine 150 to its brightness carry out 0 to 255 grade adjustable.The fundamental purpose of multiple secondary light source 160 is exactly to detect opaque multi-layer cable structure.
The measuring system of the electric wire structure of the present embodiment adopts full-automatic one-key operation to measure, when the test piece 200 of electric wire is placed on material supporting platform 110, system for computer interface is clicked measurement button, cmos camera 120 and telecentric lens 130 just can carry out image acquisition to test piece 200 automatically, image procossing and data operation is carried out through computing machine 150 pairs of images, calculate the thickness of the thinnest point, the average thickness of 6 points, area, major and minor axis internal diameter and the parameter such as external diameter and degree of eccentricity.Test figure will be saved to associative directory automatically for future query.
Measuring system due to the electric wire structure of the present embodiment is a full automatic measuring system, so all need before use to demarcate to the measuring system of the present embodiment.For the demarcation of the measuring system of the electric wire structure of the present embodiment, namely whole measuring system is proofreaded, complete the corresponding relation of the image pixel of object and the physical size of object reality exactly.Wherein, the physical size that the image pixel quantity of object is actual corresponding with object is exactly pixel equivalent.Its concrete calibration process is as shown in Figure 2: on material supporting platform 110, put into scaling board, and open LED light source 140; On the system interface of computing machine 150, password is demarcated in input, enters calibration interface; Cmos camera 130 and telecentric lens 140 carry out the collection of the image of scaling board; Use computing machine 150 to the correct image distortion collected, calculate pixel equivalent, and go out pixel equivalent according to scaling board system-computed, this pixel equivalent is calibration result.
The measuring process of the measuring system of the electric wire structure of the present embodiment is concrete as shown in Figure 3: be placed in by testing sample on microslide and make test piece 200; Test piece 200 is positioned on material supporting platform 110, and test piece 200 is placed on immediately below telecentric lens 130; Hit testing button on the system interface of computing machine 150, cmos camera 120 and LED light source 140 are all opened; Cmos camera 120 gathers the view data of test piece 200, is converted into electric signal and transfers in computing machine 150; Computing machine 150 pairs of view data have obtained all coordinates of image outline through sub-pix contours extract and contour smoothing, the area of computed image, measure the parameter such as thickness, external diameter, degree of eccentricity of electric wire, then load calibrated pixel equivalent, calculate actual measured value; Judging whether also to need to continue to measure, if need the measurement carrying out new electric wire, then making test piece 200, continuing above-mentioned testing procedure; If do not need to measure, then generating report forms exiting.
Embodiment 2
As shown in Figure 4, the measuring system of the electric wire structure of the present embodiment in the same manner as in Example 1, comprises material supporting platform 110, cmos camera 120, telecentric lens 130, LED light source 140 and computing machine 15 (in the diagram, not marking).Further, in order to easy to use, an operation cabinet 410 is also comprised.Material supporting platform 110, cmos camera 120, telecentric lens 130 and LED light source 140 are all positioned at operation cabinet 410.And operate the aluminium alloy post that high strength selected by cabinet 410, be equipped with light source ground glass plate in the bottom of support as material supporting platform 110; Aluminium alloy post is also configured with camera mount 415, for fixation of C MOS video camera 120 and telecentric lens 130 simultaneously.The shell of operation cabinet 410 has a monoblock iron sheet compacting to form, and front panel 411 is openable, for test piece is placed into material supporting platform 110.When not using measuring system, front panel 411 is closed, to reduce entering of dust.In addition, in the side of operation cabinet 410, but be not limited only to side, be configured with the interface (1394 interface) 413 of com interface 412 (cluster communication port, COM port) and video camera.And, a LED light source controller 414 is also equipped with in operation cabinet 410, LED light source controller 414 side is connected with LED light source 140 and multiple secondary light source 160 respectively, opposite side is connected with computing machine 150 by com interface 412, and computing machine 150 controls the opening and closing of LED light source 140 and secondary light source 160 and the light and shade of brightness by com interface 412.Cmos camera 120 is connected with computing machine 150 by 1394 interfaces 413, to carry out the transmission of view data.
Further, in the present embodiment, cmos camera 120 selects the industrial camera of German import, have employed IEEE1394B interface, and transfer rate, up to 800Mbps, meets the demand of fast processing; Support that heat is inserted and extracts, system is very easily integrated; Support instant cut-off or give electricity; Built-in simulation--digital quantizer; For digital type, do not need separately to connect Frame Grabber, distribution is simple; Do not need separately to connect power supply, by 1394 bus-powered line by line scan (image quality is higher); Image pretreatment function is provided, greatly simplifies image computing required time.
In sum, whether qualified the measuring system of a kind of electric wire structure of the present utility model, for measuring the geometric parameter such as thickness of insulating layer and outside dimension of electric wire, detect electric wire by these geometric parameters.Compared to traditional measuring method, use the measuring system of electric wire structure of the present utility model, adopt computer auto-detection, only need just can obtain measurement result short a few second, thus realize the measurement of high precision, high-level efficiency and high stability.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (7)
1. a measuring system for electric wire structure, comprises material supporting platform and computing machine, it is characterized in that, the measuring system of described electric wire structure also comprises: cmos camera, telecentric lens and LED light source; Wherein,
The test piece of described electric wire is placed on described material supporting platform, and described cmos camera and described telecentric lens are positioned at the upside of described material supporting platform, and described LED light source is positioned at the downside of described material supporting platform; Described telecentric lens is arranged on described cmos camera; Described cmos camera is connected by 1394 interfaces with described computing machine;
Described telecentric lens and described cmos camera are for obtaining the image of described test piece; And described cmos camera is used for the described image transfer of acquisition to described computing machine;
Described LED light source is installed, for providing integrated light source for described test piece towards described cmos camera and described telecentric lens;
Described computing machine is used for processing described image and calculating.
2. the measuring system of electric wire structure according to claim 1, is characterized in that, is connected between described cmos camera with described computing machine by 1394B interface.
3. the measuring system of electric wire structure according to claim 1, is characterized in that, described cmos camera supports hot plug.
4. the measuring system of electric wire structure according to claim 1, is characterized in that, described LED light source is connected by com interface with described computing machine.
5. the measuring system of electric wire structure according to claim 1, is characterized in that, described computing machine controls the switch of described LED light source.
6. the measuring system of electric wire structure according to claim 1, is characterized in that, described LED light source comprises multiple LED chip.
7. the measuring system of electric wire structure according to claim 1, is characterized in that, described measuring system also comprises multiple secondary light source, and described secondary light source adopts LED chip.
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| CN201420645138.2U CN204142186U (en) | 2014-10-31 | 2014-10-31 | A kind of measuring system of electric wire structure |
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| CN201420645138.2U CN204142186U (en) | 2014-10-31 | 2014-10-31 | A kind of measuring system of electric wire structure |
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| CN204142186U true CN204142186U (en) | 2015-02-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016169316A1 (en) * | 2015-04-24 | 2016-10-27 | 上海工程技术大学 | Parallel image measurement method for measuring thickness of insulating layer facing radially symmetrical cable section |
| CN107429986A (en) * | 2015-03-31 | 2017-12-01 | 株式会社自动网络技术研究所 | The manufacture method and image processing method of wire harness |
| CN110031187A (en) * | 2019-03-26 | 2019-07-19 | 华中科技大学 | A kind of height scaling method and system based on tight shot |
| RU2783678C1 (en) * | 2021-10-15 | 2022-11-15 | Федеральное государственное бюджетное учреждение науки Институт теплофизики им. С.С. Кутателадзе Сибирского отделения Российской академии наук | Optoelectronic method for measuring the diameter of a cylindrical object |
-
2014
- 2014-10-31 CN CN201420645138.2U patent/CN204142186U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107429986A (en) * | 2015-03-31 | 2017-12-01 | 株式会社自动网络技术研究所 | The manufacture method and image processing method of wire harness |
| WO2016169316A1 (en) * | 2015-04-24 | 2016-10-27 | 上海工程技术大学 | Parallel image measurement method for measuring thickness of insulating layer facing radially symmetrical cable section |
| US10060726B2 (en) | 2015-04-24 | 2018-08-28 | Shanghai University Of Engineering Science | Parallel image measurement method oriented to the insulating layer thickness of a radial symmetrical cable section |
| CN110031187A (en) * | 2019-03-26 | 2019-07-19 | 华中科技大学 | A kind of height scaling method and system based on tight shot |
| RU2783678C1 (en) * | 2021-10-15 | 2022-11-15 | Федеральное государственное бюджетное учреждение науки Институт теплофизики им. С.С. Кутателадзе Сибирского отделения Российской академии наук | Optoelectronic method for measuring the diameter of a cylindrical object |
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