CN100538346C - Laser speckle tire nondestructive testing instrument and utilize it to carry out the method for Non-Destructive Testing - Google Patents
Laser speckle tire nondestructive testing instrument and utilize it to carry out the method for Non-Destructive Testing Download PDFInfo
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- CN100538346C CN100538346C CNB2004100775228A CN200410077522A CN100538346C CN 100538346 C CN100538346 C CN 100538346C CN B2004100775228 A CNB2004100775228 A CN B2004100775228A CN 200410077522 A CN200410077522 A CN 200410077522A CN 100538346 C CN100538346 C CN 100538346C
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- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title description 10
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- 230000007547 defect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000012372 quality testing Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
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- 230000032798 delamination Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
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Abstract
The invention discloses a kind of laser speckle tire nondestructive testing instrument, this detector is in being provided with the sensing chamber of vacuum plant, by the detection head motion be connected with one can be vertically, level and the laser speckle detection head that rotatablely moves; Below detection head, be the tire automatic positioning equipment that is used to carry and locate tire; On sensing chamber's sidewall, door to be opened/closed is arranged.The present invention also provides a kind of this detector that utilizes to carry out lossless detection method, and this laser speckle tire nondestructive testing instrument can detect the tire product inherent vice, also can be applicable in the quality testing of space flight industry.This detector is simple in structure, need not vibration abatement, need not a large amount of consumptive materials, and it is low to detect cost.This lossless detection method automaticity height, testing result show in real time, and whole audience noncontact is harmless, can detect any position of tire, the position and the size of defect recognition automatically, detects tire efficient height, can be applicable to production line and work continuously.
Description
Technical field
The invention belongs to the tire Dynamic Non-Destruction Measurement, particularly a kind of laser speckle tire nondestructive testing instrument and utilize it to carry out the method for Non-Destructive Testing.
Background technology
Adopting laser technology that tire is carried out Non-Destructive Testing has two kinds of methods usually, and a kind of is laser hologram tire Dynamic Non-Destruction Measurement, and another kind is the laser speckle tire Dynamic Non-Destruction Measurement.Laser hologram tire Dynamic Non-Destruction Measurement is the technological means that is applied to detect the tire internal soundness nineties.It adopts a relevant laser instrument, uses the holographic interference principle, by vacuum load double-exposure means, tire inner surface is detected, and inside tires defective such as delamination, bubble etc. are detected.Because the characteristic of holographic interference technique at first, requires the lasing light emitter coherence fabulous, generally uses He-Ne laser instrument to make coherent source, its coherent length can reach more than more than 10 meter; Secondly, requirement will have strict shockproof platform, and shockproof platform is set up huge, and ambient vibration is very big to the holographic imaging influence simultaneously, and this has just limited this technology and can not be applied to can only independently set up holographic interference sensing chamber among the production line detection; The 3rd, owing to adopt the holographic dry plate medium of noting down, make the exposure load, get sheet, handle dry plate, reproduce interferogram and all require under the environment of darkroom, to carry out, and testing result lags behind, can not judge the result at once, influence detection efficiency.More than all factors make laser hologram tire Dynamic Non-Destruction Measurement slower development, be applied in the production testing few.Another patent application of the applicant (Chinese patent application numbers 200410052185.7, denomination of invention is laser speckle detection head and application thereof) in a kind of laser speckle detection head is disclosed, but also do not utilize this detection head tire to be carried out the detector of Non-Destructive Testing at present.At present, the industrial laser speckle tire nondestructive testing instrument that does not also have integral body.
Summary of the invention
First purpose of the present invention is to overcome the deficiencies in the prior art, and a kind of laser speckle tire nondestructive testing instrument is provided.This detector can solve and detect the technical matters that tire efficient is low, can not be applied to production line, testing result hysteresis; Also can detect any position of whole piece tire, automatically the position and the size of defect recognition; Need not anti-shock system.
Another object of the present invention is to provide a kind of uses above-mentioned laser speckle tire nondestructive testing instrument to carry out the method for Non-Destructive Testing.
First purpose of the present invention realizes by following proposal: the laser speckle tire nondestructive testing instrument, it is characterized in that: in being provided with the sensing chamber of vacuum plant, by the detection head motion be connected with one can be vertically, level and the laser speckle detection head that rotatablely moves; Below detection head, be the tire automatic positioning equipment that is used to carry and locate tire; On sensing chamber's sidewall, door to be opened/closed is arranged.
In order to realize into tire, to go out the tire robotization, on the two lateral walls of described sensing chamber, can have one to be opened/closedly to advance that tire door and one are to be opened/closed to go out the tire door respectively, two respectively with advance the tire conveying belt and go out the tire conveying belt mutually opposed.
Described detection head motion comprises the detection head connecting link and the horizontal mobile mechanism that is connected with connecting link, vertical movement mechanism, rotational motion mechanism that is connected with detection head; The detection head motion is fixed on the sensing chamber top by main beam.
Described rotational motion mechanism comprises rotary drive motor, swing pinion, rotary connector; Horizontal mobile mechanism comprises and moves horizontally the linear bearing pair, moves horizontally crossbeam, moves horizontally drive motor; Vertical movement mechanism comprises vertical moving linear bearing pair, vertical moving drive motor, vertical moving slideway; Main beam is fixed on the sensing chamber top, rotary connector links to each other with main beam, rotary drive motor and swing pinion respectively, the vertical moving drive motor links to each other with rotary connector with worm reduction gear, the detection head connecting link respectively with the laser speckle detection head, move horizontally crossbeam and link to each other, move horizontally the linear bearing pair and move horizontally crossbeam and link to each other, vertical moving linear bearing pair with move horizontally crossbeam and link to each other.
Described tire automatic positioning equipment can comprise the detecting head that is used to measure diameter of tyres and be used to carry and the indoor conveying belt of mobile tyre, detecting head moves by the indoor conveying belt of computer program-driven after recording diameter of tyres, thereby makes tire be positioned central authorities of sensing chamber.
Described laser speckle detection head can be selected disclosed laser speckle detection head in the patent application of application number 200410052185.7 for use, it comprises detection head casing, semiconductor laser, photoelectric commutator, optical lens and shear mirror, it is characterized in that semiconductor laser and photoelectric commutator are fixed on the detection head chassis base; One beam expanding lens is arranged before the semiconductor laser, and beam expanding lens and semiconductor laser are linked to be and are one; Semiconductor laser and beam expanding lens are positioned on the same optical axis, and photoelectric commutator, optical lens, shear mirror are linked to be an integral body, and photoelectric commutator and optical lens and shear mirror are positioned on the same optical axis; Angle between semiconductor laser and photoelectric commutator two optical axises is 2～20 °.
Describedly advance the tire door or go out the tire door can comprise fixed head, cylinder, door-plate, caulking gum, connector, be connected and fixed piece and rotating shaft, cylinder is connected with fixed head, door-plate respectively by connector, there is a caulking gum at the door-plate edge, door-plate by be connected and fixed piece, rotating shaft is connected with sensing chamber.
Describedly advance tire conveying belt, indoor conveying belt and go out the tire conveying belt on same surface level.
Laser speckle tire nondestructive testing instrument of the present invention carries out the method for Non-Destructive Testing tire, and its operation steps is:
(1) tire is sent in the sensing chamber, tire is positioned central authorities of sensing chamber by the tire automatic positioning equipment;
(2) the detection head motion drives laser speckle detection head level, vertical direction moves and moves to the tire middle part, tire is positioned at the center of laser speckle detection head, the center of tire is overlapped with the center of laser speckle detection head, wheel tyre bead 360 degree are separated into a plurality of sectors, and the laser speckle detection head detects respectively each sector of tire successively;
(3) vacuum plant begins to vacuumize, after exhausting vacuum, the laser speckle detection head detects shooting to the tire inner surface first sector part, after image pickup after the deformation of acquisition tire vacuum was finished, vacuum plant was put into atmosphere and is entered sensing chamber, makes sensing chamber's internal gas pressure reach normal pressure, at this moment, the laser speckle detection head carries out detecting shooting the second time to the tire inner surface first sector part, and shooting obtains the normal image of tire, and computing machine carries out Treatment Analysis to twice image;
(4) the detection head motion drives the laser speckle detection head and rotatablely moves to the second sector part of tire inner surface, and the second sector part of tire inner surface is detected, and repeats above-mentioned detection step; The laser speckle detection head revolves three-sixth turn the inside surface of whole tire is detected, after all having detected, the laser speckle detection head rises to the top of tire, opens out the tire door, tire conveying belt in the sensing chamber is transported to out on the tire conveying belt, finishes the detection of a tires.
The action principle of laser speckle tire lossless detection method of the present invention is: adopt laser speckle technique, phase change between after the relevant striped that utilizes tire to produce the interference speckle field after Stimulated Light is shone detects the twin-beam wavefront, application phase is moved technology, measure tire surface deformation amount, testing result is not influenced by the tire rigid motion, reliable and stable, use photoelectrical coupler CCD as recording medium, make the speckle field image recording on photoelectrical coupler, use photoelectric conversion technique light signal is converted to electric signal, carry out image processing and analyzing by image pick-up card, the testing result of inside tires defective is presented on the computer screen.
The laser speckle tire nondestructive testing instrument can detect tire product (as doughnut, aero tyre) inherent vice (defective is mainly bubble, delamination etc.), also can be applicable in the quality testing of other field such as space flight industry.
The relative prior art of the present invention has following advantage and effect: the laser speckle tire nondestructive testing instrument is simple in structure, need not vibration abatement, need not a large amount of consumptive materials, and it is low to detect cost.This lossless detection method automaticity height, testing result show in real time, and whole audience noncontact is harmless, can detect any position of tire, the position and the size of defect recognition automatically, detects tire efficient height, can be applicable to production line and work continuously.
Description of drawings
Fig. 1 is the structural representation of laser speckle tire nondestructive testing instrument.
Fig. 2 is the structural representation of detection head motion.
Fig. 3 is the side-looking structural representation of detection head motion.
Fig. 4 is the structural representation of tire door (or going out the tire door) into.
Fig. 5 is the structural representation of tire conveying belt (or going out the tire conveying belt) into.
Fig. 6 is the structural representation of laser speckle detection head.
Fig. 7 is the structural representation of the detection head casing of laser speckle detection head.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment 1
As Fig. 1, Fig. 2, shown in Figure 3, laser speckle tire nondestructive testing instrument of the present invention comprises sensing chamber 14, vacuum plant 15, and main beam 7, detection head motion 23, tire automatic positioning equipment B advances tire door 11 and goes out tire door 17; Detection head motion structure 23 comprises laser speckle detection head A, detection head connecting link 24, and rotational motion mechanism, vertical movement mechanism, horizontal mobile mechanism, rotational motion mechanism comprise rotary drive motor 8, swing pinion 9, rotary connector 27; Horizontal mobile mechanism comprises and moves horizontally linear bearing pair 2, moves horizontally crossbeam 3, moves horizontally drive motor 4; Vertical movement mechanism comprises vertical moving linear bearing pair 5, vertical moving drive motor 6, vertical moving slideway 26; Detection head motion 23 is fixed on sensing chamber's 14 crown centers by main beam 7, rotary connector 27 respectively with main beam 7, rotary drive motor 8 links to each other with swing pinion 9, vertical moving drive motor 6 links to each other with rotary connector 27 with worm reduction gear 20, detection head connecting link 24 respectively with laser speckle detection head A, moving horizontally crossbeam 3 links to each other, move horizontally the linear bearing pair and move horizontally crossbeam and link to each other, laser speckle detection head A is connected with detection head connecting link 24 with screw and is fixing, detection head connecting link 24 is moving horizontally crossbeam 3 times, drive by horizontal synchronization band 25 can move horizontally, and horizontal synchronization band 25 drives by moving horizontally drive motor 4.Moving horizontally crossbeam 3 is connected and fixed with vertical moving linear bearing pair 5 usefulness screws, vertical moving linear bearing pair 5 is slided on vertical moving slideway 26, vertical moving linear bearing secondary 5 is fixedlyed connected with roller screw 21, roller screw 21 is enclosed within on the roller screw mandrel 22, roller screw mandrel 22 rotates drive vertical moving linear bearing pair 5 and moves up and down, and the power of roller screw mandrel 22 passes through worm reduction gear 20 transmissions from vertical moving drive motor 6.Rotary drive motor 8 driven in rotation gears 9 driven rotary connectors 27 can be done 360 degree rotations, drive this detection head motion 23 and rotatablely move; Vertical drive motor 6 drives worm reduction gear 20 and drives vertical moving linear bearing pair 5 drive horizontal mobile mechanism and laser speckle detection head A vertical movement up and down on vertical moving slideway 26; Moving horizontally drive motor 4 drives and moves horizontally linear bearing pair 2 and drive laser speckle detection head A on the crossbeam 3 and move horizontally moving horizontally.Vacuum plant 15 is arranged at sensing chamber 14 tops, and vacuum plant is the steelframe mount structure; There is into tire door 11 sensing chamber 14 both sides and goes out tire door 17, advance tire door 11 and go out tire automatic positioning equipment B is arranged between the tire door 17 in sensing chamber 14 both sides, tire automatic positioning equipment B comprises the detecting head B1 that is used to measure diameter of tyres and is used to carry and the indoor conveying belt B2 of mobile tyre, detecting head B1 moves by the indoor conveying belt B2 of computer program-driven after recording diameter of tyres, thereby makes tire 13 be positioned 14 central authorities of sensing chamber.Advancing tire door 11 sides has into tire conveying belt 10, and going out tire door 17 sides has the tire of going out conveying belt 18.Advance tire conveying belt 10, go out in tire conveying belt 18 and the sensing chamber conveying belt B2 on same surface level, advance tire conveying belt 10 with sensing chamber 14, go out tire conveying belt 18 and the 14 spacing 20mm of sensing chamber.
This embodiment explanation is into and out of the structure of tire door.The concrete structure that advances tire door 11 and go out tire door 17 of the present invention as shown in Figure 4, advance tire door 11 and to go out tire door 17 structures identical, comprise fixed head 42, cylinder 36, door-plate 40, caulking gum 41, connector 35, connector 39, be connected and fixed piece 37 and rotating shaft 38, cylinder 36 is connected with fixed head 42, door-plate 40 by connector 35, connector 39, one caulking gum is arranged on the door-plate edge, door-plate 40 by be connected and fixed piece 37, rotating shaft 38 is connected with sensing chamber 14.
When tire 13 entered sensing chamber 14, computer control cylinder 36 shrank, and door-plate 40 is opened, and advances tire door 11 and opens; Tire 13 enters sensing chamber 14, and after computer control cylinder 36 was upheld, door-plate 40 overlapped sealing with sensing chamber, advance tire door 11 and shut.
This embodiment explanation is into and out of the structure of tire conveying belt mechanism.Of the present inventionly advance tire conveying belt 10 and go out tire conveying belt 18 concrete structures as shown in Figure 5, advance tire conveying belt 10 and to go out tire conveying belt 18 structures identical, comprise roller 28, motor 29 and speed reduction unit 30, conveying belt 31, support 32, motor 29 links to each other with speed reduction unit 30, roller 28 links to each other with conveying belt 31, and motor 29 drives speed reduction unit 30, and speed reduction unit 30 drives roller 28 and drives conveying belt 31, this speed reduction unit 30 drives roller 28 power transmission and can adopt sprocket wheel and chain, also can adopt synchronous band.
Tire 13 is positioned on the conveying belt 31 of tire conveying belt 10 into, motor 29 drives speed reduction units 30, and speed reduction unit 30 drives rollers 28 and drives conveying belt 31, tire 13 is transported to into tire door 11 is other, and automatic transport is gone into sensing chamber 14.
This embodiment illustrates the structure of detection head A.As Fig. 6, shown in Figure 7, laser speckle detection head A is by the detection head casing, semiconductor laser A1, photoelectric commutator A7, optical lens A6 and shear mirror A4, beam expanding lens A3 forms, the detection head casing is by detection head side plate A2, detection head front window A5, detection head upper plate A8, detection head base A9 forms, on detection head front window A5, two holes are arranged, hole A11 is the laser radiation hole, hole A12 is an imaging hole, semiconductor laser A1 and photoelectric commutator A7 are fixed on the detection head chassis base A9 with screw rod and the fixed orifice that is arranged on chassis base, beam expanding lens A3 and semiconductor laser A1 are in aggregates, and semiconductor laser A1 and beam expanding lens A3 are positioned on the same optical axis.Photoelectric commutator A7, optical lens A6, shear mirror A4 are linked to be an integral body, shear mirror A4 is fixed on threaded outer putting and is enclosed within on the optical lens A6, optical lens A6 is connected with shear mirror A4 with adapter ring, photoelectric commutator A7 and optical lens A6 and shear mirror A4 are positioned on the same optical axis, and the angle between semiconductor laser A1 and photoelectric commutator A7 two optical axises is 10 °.
The concrete processing step that utilizes this laser speckle tire nondestructive testing instrument to carry out Non-Destructive Testing is:
Tire 13 is positioned on the conveying belt 31 of tire conveying belt 10 into, that opens sensing chamber 14 advances tire door 11, tire 13 is delivered in the sensing chamber in the sensing chamber 14 on the conveying belt B2 by the conveying belt 31 that advances the tire conveying belt, the detecting head B1 of tire automatic positioning equipment B moves by the indoor conveying belt B2 of computer program-driven after recording diameter of tyres, thereby makes tire 13 be positioned 14 central authorities of sensing chamber.According to the tire specification size, detection head motion 23 levels, vertical direction move drive laser speckle detection head A and move to tire 13 middle parts, tire 13 is positioned at the center of laser speckle detection head A, tire 13 centers are overlapped with the center of laser speckle detection head A.To take turns tyre bead 360 degree and be separated into 12 sectors, laser speckle detection head A detects respectively tire 13 each sector.Vacuum plant 15 in the sensing chamber 14 begins to vacuumize, after exhausting vacuum, laser speckle detection head A detects shooting to the tire 13 inside surfaces first sector part, after image pickup after the 13 vacuum deformation of acquisition tire is finished, vacuum plant 15 is put into atmosphere and is entered sensing chamber 14, make sensing chamber's 14 internal gas pressures reach normal pressure, at this moment, laser speckle detection head A carries out detecting the second time shooting to the tire 13 inside surfaces first sector part, shooting obtains the normal image of tire, and computing machine carries out Treatment Analysis with twice image.If handling the back image is normal speckle pattern, illustrate that this tire is normal, unusual interference fringe appears if handle the speckle pattern of rear tyre, this inside tires defectiveness is described.Tire to clapping in can not carrying out can move to laser speckle detection head A tire 13 outsides and detect.The bat mode detects tire in general the employing, because of tire inner surface comparatively smooth and have can light harvesting radian, the mode of bat outside the employing just under the situation of during can't carrying out, clapping only.
Drive laser speckle detection head A rotation by rotatablely moving of detection head motion 23, the second sector part of tire 13 inside surfaces is detected, repeat above-mentioned detection step.Laser speckle detection head A rotates successively, inside surface to whole tire 13 detects, after all having detected, laser speckle detection head A rises to the top of tire 13, open out tire door 17, tire 13 conveying belt B2 in the sensing chamber is transported to out on the tire conveying belt 18, so far finishes the detection of a tires.Simultaneously, another tires is placed on on the tire conveying belt 10, carries out new one and take turns detection.
Because adopt phase-shifting technique, testing result is not subjected to the influence of tire rigid motion, so detector need not vibration abatement, detector can be installed on the tire production line, finished tire is detected, and testing result shows in real time, can judge the quality of tire.
Claims (1)
1, a kind of laser speckle tire nondestructive testing instrument is characterized in that: in being provided with the sensing chamber of vacuum plant, by the detection head motion be connected with one can be vertically, level and the laser speckle detection head that rotatablely moves; Below detection head, be the tire automatic positioning equipment that is used to carry and locate tire;
On the two lateral walls of described sensing chamber, have one to be opened/closedly to advance that tire door and one are to be opened/closed to go out the tire door respectively, two respectively with advance the tire conveying belt and go out the tire conveying belt mutually opposed;
Described detection head motion comprises the detection head connecting link and the horizontal mobile mechanism that is connected with connecting link, vertical movement mechanism, rotational motion mechanism that is connected with detection head; The detection head motion is fixed on the sensing chamber top by main beam;
Described rotational motion mechanism comprises rotary drive motor, swing pinion and rotary connector, described horizontal mobile mechanism comprises and moves horizontally the linear bearing pair, moves horizontally crossbeam and move horizontally drive motor that described vertical movement mechanism comprises vertical moving linear bearing pair, vertical moving drive motor and vertical moving slideway; Described main beam is fixed on the sensing chamber top, rotary connector links to each other with main beam, rotary drive motor and swing pinion respectively, the vertical moving drive motor links to each other with rotary connector by worm reduction gear, the detection head connecting link respectively with the laser speckle detection head, move horizontally crossbeam and link to each other, move horizontally the linear bearing pair and move horizontally crossbeam and link to each other, vertical moving linear bearing pair with move horizontally crossbeam and link to each other;
Described laser speckle detection head comprises detection head casing, semiconductor laser, photoelectric commutator, optical lens and shear mirror, and semiconductor laser and photoelectric commutator are fixed on the detection head chassis base; One beam expanding lens is arranged before the semiconductor laser, and beam expanding lens and semiconductor laser are linked to be and are one; Semiconductor laser and beam expanding lens are positioned on the same optical axis, and photoelectric commutator, optical lens, shear mirror are linked to be an integral body, and photoelectric commutator and optical lens and shear mirror are positioned on the same optical axis; Angle between semiconductor laser and photoelectric commutator two optical axises is 2～20 °;
Describedly advance the tire door or go out the tire door to comprise fixed head, cylinder, door-plate, caulking gum, connector, be connected and fixed piece and rotating shaft, cylinder is connected with fixed head, door-plate respectively by connector, there is a caulking gum at the door-plate edge, door-plate by be connected and fixed piece, rotating shaft is connected with sensing chamber;
Described tire automatic positioning equipment comprises the detecting head that is used to measure diameter of tyres and is used to carry and the indoor conveying belt of mobile tyre, detecting head moves by the indoor conveying belt of computer program-driven after recording diameter of tyres, thereby makes tire be positioned central authorities of sensing chamber;
Describedly advance tire output band, indoor conveying belt and go out the tire conveying belt on same surface level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100775228A CN100538346C (en) | 2004-12-22 | 2004-12-22 | Laser speckle tire nondestructive testing instrument and utilize it to carry out the method for Non-Destructive Testing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100775228A CN100538346C (en) | 2004-12-22 | 2004-12-22 | Laser speckle tire nondestructive testing instrument and utilize it to carry out the method for Non-Destructive Testing |
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| CN1632543A CN1632543A (en) | 2005-06-29 |
| CN100538346C true CN100538346C (en) | 2009-09-09 |
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| CNB2004100775228A Expired - Fee Related CN100538346C (en) | 2004-12-22 | 2004-12-22 | Laser speckle tire nondestructive testing instrument and utilize it to carry out the method for Non-Destructive Testing |
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