CN103323465A - Laser detection system of carbon fiber reinforced type composite wire core characteristics - Google Patents
Laser detection system of carbon fiber reinforced type composite wire core characteristics Download PDFInfo
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- CN103323465A CN103323465A CN2013102387052A CN201310238705A CN103323465A CN 103323465 A CN103323465 A CN 103323465A CN 2013102387052 A CN2013102387052 A CN 2013102387052A CN 201310238705 A CN201310238705 A CN 201310238705A CN 103323465 A CN103323465 A CN 103323465A
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Abstract
The invention is suitable for the field of automatic detection, and provides a laser detection system of carbon fiber reinforced type composite wire core characteristics. The system comprises a mechanical support device, a template projection collecting device and a computational analysis device, wherein the template projection collecting device is movably arranged on the mechanical support device and is used for projecting a laser ray array template on the surface of a wire core and collecting a laser signal reflected by the surface of the wire core; the template projection collecting device is connected with the computational analysis device through a data cable, and the computational analysis device is used for automatically calculating diffraction range of rays after passing through the surface of the wire core according to the laser signal collected by the template projection collecting device and can instantly judge and recognize the representation condition of the wire core.
Description
Technical field
The invention belongs to the robotization detection field, relate in particular to the laser detection system that a kind of high purity carbon fiberreinforced composite conductor core characterizes.
Background technology
At present, the surface inspecting method of high purity carbon fiberreinforced compound cable core mainly depends on the conventional art workman, relies on the years of work experience to be sampled with naked eyes in the core surface and evaluates and tests and the quality identification.So no matter in the efficient of the accuracy rate of continuous detecting, continuous detecting, Effective product cost control, effectively can't satisfy related needs in the modern enterprise production managements such as abundant utilization of production loss control and human resources.On the other hand; in testing process; often can betide the damage of the lip-deep nonproductive link of core; this is normally because general physical detection methods needs the osculatory wicking surface; and; in order to save the production space, the common rolling of finished product core is stored, and this detects to artificial sampling and causes very large difficulty.So, a kind of based on untouchable detection mode, high-precision, can be integrated in production line and carry out instant continuous detection method and become at present requirement comparatively urgent in modern production technique.
Summary of the invention
The object of the invention is to: the laser detection system that provides a kind of high purity carbon fiberreinforced composite conductor core to characterize, be intended to solve prior art and detect for the surface of high purity carbon fiberreinforced compound cable core and can only rely on manually, cause the problem that detection efficiency is low, accuracy rate is low.
The object of the present invention is achieved like this:
The laser detection system that a kind of high purity carbon fiberreinforced composite conductor core characterizes, described system comprises: mechanical support device, template projection harvester and computational analysis device; Described template projection harvester is movably arranged on the described mechanical support device, is used for projecting laser linear array template in described wire stylet surface and gathers the laser signal of wire stylet surface reflection; Described template projection harvester is connected with described computational analysis device by data cable, described computational analysis device is used for automatically throwing the diffraction amplitude of laser signal compute ray behind process core surface that harvester gathers according to template, and wire stylet sign situation is made instant judgement and identification.
Described mechanical support device comprises two circular structure and four mechanical drive bars, and the two ends of described mechanical drive bar are movably arranged on respectively on described two circular structure by numerical control pincers dynamic model piece.
Described template projection harvester comprises four groups of laser projecting apparatuss and laser signal acquisition camera, one group of laser projecting apparatus and laser signal acquisition camera are installed on every mechanical drive bar, and every group of laser projecting apparatus is all identical in the position that the mechanical drive bar is installed with the laser signal acquisition camera.
Outstanding advantages of the present invention is: the present invention adopts laser rays array template as light source, realize automatic detection for high purity carbon fiberreinforced composite cable core surface by structure optics line sweep method in conjunction with the Laser video camera head, not only can with the slitless connection of the full automatic production line of modernization, and can realize that for the breakage of product surface automatic immediate location, accuracy of detection are accurately controlled, and realize with low cost.
Description of drawings
Fig. 1 is the applied ultimate principle geometric graph that the embodiment of the invention provides;
Fig. 2 is the organigram of mechanical support and projection collecting part in the laser detection system that provides of the embodiment of the invention;
Fig. 3 is the cross sectional representation of the central portion of mechanical support part among Fig. 2;
Fig. 4 is the top plan view of central portion among Fig. 3;
Fig. 5 is the front structural map of the support bar of mechanical support part among Fig. 2;
Fig. 6 is the cross sectional representation of support bar among Fig. 5.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The present invention is based on optical reflection space geometry principle, adopt laser rays array template as light source, realize automatic detection for high purity carbon fiberreinforced composite cable core surface by structure optics line sweep method in conjunction with the Laser video camera head.
Fig. 1 shows the applied ultimate principle of laser detection system that the embodiment of the invention provides.
Laser rays array template (A5) is projeced on object under test (A3) surface that (object to be measured (A3) is only used for signal herein, different from the geometric shape of following composite conductor core (A4)), then immediately observed and gather laser signal after the core surface refraction by camera (A1), by computing machine the image after gathering is made intellectual analysis to draw the final conclusion about detected surface again.
Laser is applied to medium comparatively common in the precise detection technology as a kind of, it causes laser to become preferred light source of the present invention for core surface nonabsorbable, high-precision propagation directionality, for the high sensitivity of tiny core surface abnormalities and the high synchronism of scanning lattice etc.It has for automatic detection object to be detected surface damage, solidify situation inhomogeneous or that outward appearance can't reach quality standards has the advantages such as the controllability that detects accurately quality, higher and continuous detection speed, continuous detecting precision and full automation.
The camera that adopts in the embodiment of the invention adopts object space heart mensuration far away, being about to aperture diaphragm is placed on the focal plane, picture side of optical system, when aperture diaphragm side is on focal plane, picture side, even object distance changes, image distance also changes, but image height does not change, and the dimension of object that namely records can not change.This camera is in conjunction with the high-accuracy characteristic of laser self, can reach high sensitivity for the trickle surface damage of compound wire wicking surface, can have larger range of adjustment by the fault freedom parameter.
In described structure optics line sweep method, the irradiation of structured light that target to be measured is encoded, camera collection be by the object of structure light coding, then the image that obtains is input to that computing machine is processed and reconstruct, obtain the surface profile map of target, in order to further analyze and measure.Object, subpoint, observation station become triangle relation in the space.When reference stripe projected target surface, because body surface is uneven, distortion had occured in the line structure striped, and this distortion is because the regular streaks of projection is subjected to due to the object surface shape modulation, so it has comprised the three-dimensional information of object surface shape.By setting up the mathematical model of corresponding relation between reflection distortion striped and the object surface shape, just can infer the three-dimensional information of object surface shape from the shape of stripes information after distorting, thereby draw line drawing.
Based on above-mentioned principle and method, the automatic checkout system that the high purity carbon fiberreinforced composite conductor core that the embodiment of the invention provides characterizes comprises mechanical support device, template projection harvester and computational analysis device, wherein, the formation of mechanical support device and template projection harvester as shown in Figure 2.
According to the geometry appearance of detected composite conductor core, described mechanical support device overall shape is cylindrical, comprises that mainly two circular support devices (B1) connect via four mechanical support bars (B2).Shown in circular support device cross-sectional view among Fig. 3, circular support device (B1) external diameter is that R, internal diameter are r, core to be measured (A4) passes through surveyed area via center of circle O, the mechanical support bar will be in tie point (B3) welding that fixes, distance from tie point (B3) outer to center of circle O is da, tie point for length b width w and be respectively dRr apart from external diameter and internal diameter.Shown in the aerial view of these parts of Fig. 4, circular support member thickness is t, and tie point (B3) also is dRr apart from edge and the distance on lower edge and the distance of aerial view middle distance external diameter and internal diameter on the thickness.Core to be measured (A4) is consistent with situation among Fig. 3, and O passes through by the center of circle, and the size of tie point should be complementary with width w and the height b of the contiguous block (B6) of mechanical support bar (B2).As shown in Figure 5 in the structural map, the geometric shape of mechanical support bar (B2) is (long l * wide w * high b) rectangular steel body, both sides are provided with the contiguous block (B6) that the tie point (B3) with circular support structure (B1) is fixedly linked, the mechanical support bar (B2) of central authorities is rotated take length direction as axle, and help arranging of laser module geometrical orientation.Mechanical support bar (B2) inboard is provided with groove (B5), convenient fixing heart laser signal acquisition camera far away (A1) and laser projecting apparatus (A2).In debug process in advance, must make detected composite conductor core surface distance camera distance is the parameter focal length of this camera for f(f); Secondly, the distance of the stiff end of laser projecting apparatus and the stiff end of camera is ds; Again, be θ by the angle that contrasts laser beam and camera collection direction, to guarantee the correct of other tuning parameter.The cross-sectional configuration figure of mechanical support bar (B4) as shown in Figure 6, the design proposal of groove (B5) comprises that inboard A/F is that db, outer openings width are dx and highly are dw.Because the major technique of image acquisition is the telecentric imaging method, it is had relatively high expectations for focusing on adjustment accuracy, so be ± 3mm that the error range of angle is ± 1.5 ° about the error range of length wherein.For avoiding core to be measured to shake in transmission course, its both sides should load the balanced tension force of equity.
Described template projection harvester comprises four groups of laser projecting apparatuss (A2) and laser signal acquisition camera (A1), every group of laser projecting apparatus (A2) and camera (A1) mode are as shown in Figure 5 located at mechanical support bar (B2), composite conductor core to be measured (A3) at the uniform velocity passes through surveyed area by the home position of circular support structure (B1), corresponding four laser signal acquisition camera (A1) are done accurately to focus on after via the core surface refraction to the laser rays array template (A5) of emission, and the distance that namely arrives the core surface from the acquisition chip of camera is the focal length parameter of camera.In this process, it is static that all detection components keep, and the embodiment of the invention does not need further to adjust in operation process, accurately calculates when namely all debug in the early stage the instant locus of all component and learn.
Utilize laser reflection characteristic and the intrinsic high direction propagation characteristic of laser itself on core surface, use camera collection with the refraction laser signal of composite conductor core surface information, and make accurate prediction for the signal behind the core surface characteristics utilization spatial data birefringence as can be known.Intact such as the compound wire wicking surface, the laser signal that collects is consistent with the linear array template (A5) of launching, so this laser linear array template (A5) is anticipated signal herein; As meet surface damage, curing is inhomogeneous or outward appearance can't reach quality standards product section situation, the refraction laser dot-matrix signal that focuses on this place that collects creates a difference with respect to anticipated signal, can make precisely, locate fast and judge for the core surface characteristics by this signal difference.The core end can be by the wind traction at the uniform velocity by surveyed area (speed herein should be complementary with the speed of production of core extruding equipment, with the slitless connection of realization with production equipment).Four groups of laser detection devices can be guaranteed wire stylet surface test-accepting fully continuously in the space.Laser projecting apparatus, gearing are partly and the laser signal acquisition camera all is connected with the computational analysis device by data cable and controlled by it.
The computational analysis device uses lattice array template Processing Algorithm that the laser intelligence video flowing of camera collection is done continuous processing, distortion by the laser array template, can draw the diffraction amplitude of light behind process testee surface, i.e. the reverse feature that calculates the testee surface.Wherein the distortion of template can draw fast by related function, for the line structure template, is calculated as the highest complexity of linearity, can satisfy the instant testing requirement to the compound wire wicking surface fully.Simultaneously, can also in conjunction with the transmission speed of video flowing frequency acquisition, time and core, by known space geometry position, draw the accurate location of abnormal according to resulting abnormal signal in the specific frame of video flowing.In this place's decision algorithm, can set the controllable characteristics that a threshold values improves the fault freedom of this detection method and realizes accuracy of detection.
The laser detection system that the high purity carbon fiberreinforced composite conductor core that the embodiment of the invention provides characterizes can with the slitless connection of the full automatic production line of modernization; breakage for product surface can realize that automatic immediate is located, accuracy of detection is accurately controlled; and realize with low costly, this system is of great significance for modernization, industrialization, robotization, large-scale and scientific production tool.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the laser detection system that high purity carbon fiberreinforced composite conductor core characterizes is characterized in that, described system comprises: mechanical support device, template projection harvester and computational analysis device; Described template projection harvester is movably arranged on the described mechanical support device, is used for projecting laser linear array template in described wire stylet surface and gathers the laser signal of wire stylet surface reflection; Described template projection harvester is connected with described computational analysis device by data cable, described computational analysis device is used for automatically throwing the diffraction amplitude of laser signal compute ray behind process core surface that harvester gathers according to template, and wire stylet sign situation is made instant judgement and identification.
2. the laser detection system that characterizes of high purity carbon fiberreinforced composite conductor core as claimed in claim 1, it is characterized in that, described mechanical support device comprises two circular structure and four mechanical drive bars, and the two ends of described mechanical drive bar are movably arranged on respectively on described two circular structure by numerical control pincers dynamic model piece.
3. the laser detection system that characterizes of high purity carbon fiberreinforced composite conductor core as claimed in claim 2, it is characterized in that, described template projection harvester comprises four groups of laser projecting apparatuss and laser signal acquisition camera, one group of laser projecting apparatus and laser signal acquisition camera are installed on every mechanical drive bar, and every group of laser projecting apparatus is all identical in the position that the mechanical drive bar is installed with the laser signal acquisition camera.
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| CN2013102387052A CN103323465A (en) | 2012-06-18 | 2013-06-17 | Laser detection system of carbon fiber reinforced type composite wire core characteristics |
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| CN201210200203.6 | 2012-06-18 | ||
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| CN2013102387052A CN103323465A (en) | 2012-06-18 | 2013-06-17 | Laser detection system of carbon fiber reinforced type composite wire core characteristics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238605A (en) * | 2017-06-08 | 2017-10-10 | 广东嘉铭智能科技有限公司 | A kind of cylindric outer surface of workpiece defect inspection method and device |
| CN107389562A (en) * | 2017-07-24 | 2017-11-24 | 重庆赛能软件技术有限公司 | Glass fiber quality detecting system |
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| US3777171A (en) * | 1971-07-26 | 1973-12-04 | Westinghouse Electric Corp | Method and apparatus for detecting flaws in continuous length tubular glass |
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Cited By (3)
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| CN107238605A (en) * | 2017-06-08 | 2017-10-10 | 广东嘉铭智能科技有限公司 | A kind of cylindric outer surface of workpiece defect inspection method and device |
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| CN107389562A (en) * | 2017-07-24 | 2017-11-24 | 重庆赛能软件技术有限公司 | Glass fiber quality detecting system |
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Application publication date: 20130925 |