CN2837838Y - Apparatus for microwave focusing imaging detection of radial tire defect - Google Patents
Apparatus for microwave focusing imaging detection of radial tire defect Download PDFInfo
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- CN2837838Y CN2837838Y CN 200520021958 CN200520021958U CN2837838Y CN 2837838 Y CN2837838 Y CN 2837838Y CN 200520021958 CN200520021958 CN 200520021958 CN 200520021958 U CN200520021958 U CN 200520021958U CN 2837838 Y CN2837838 Y CN 2837838Y
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Abstract
The utility model relates to an apparatus for detection of radial tire defects by the method of microwave focusing imaging, which relates to an apparatus for nondestructive flaw detection of tires. The utility model overcomes the defects of high cost, high facility maintenance expense and serious harmfulness to human body of the present apparatus for detection of tire defects. The utility model is composed of a computer 1, a signal transformation circuit 2, a signal amplifying circuit 3, an address decoding circuitry 4, a microwave generator 5, switches 6, a microwave emitting antenna array 7, a microwave receiving antenna array 8 and a display device 9, wherein the 7 and the 8 are contiguously arranged and form an included angle; the input end of the 7 is connected with the output end of the 5 through the 6; the output end of the 8 is connected with the input end of the 3 through the 6; the output ends of the 5 and the 3 are connected with the input end of the 2; the output end of the 2 is connected with the input end of the 1; the display output end of the 1 is connected with the input end of the 9; the control output end of the 1 is connected with the input end of the 4; the output end of the 4 is connected with the control end of each 6; the utility model has the advantages of low cost, slight harmfulness and high detection clearness.
Description
Technical field
The utility model is related to the detection means of defect in a meridian line tyre, the equipment for belonging to nondestructive inspection.
Background technology
Security of the detection for raising running car, stationarity and conevying efficiency of tyre defect (having bubble or metallic inclusion and cords break, skewed etc. in rubber layer) etc. is taken turns to have great importance, current rotating radial tyre defect is typically checked with the method for radioscopy, equipment cost used by the method is high, the maintenance cost of equipment is high, and X-ray is larger to the harmfulness of human body in inspection.The scholar Kim Y.J. of foreign countries propose a kind of microwave focal imaging method within 2002, the method is based on electromagnetic compensation and Fourier scattering principle, various defects that can be inside detecting object using microwave, have the advantages that low cost, long lifespan, high resolution, imaging clearly, accuracy of detection are high, but there is presently no microwave focal imaging method be used for radial defects detection report.
Utility model content
The purpose of this utility model is to provide the microwave focal imaging method detection means of a meridian line tyre defect, with the shortcoming for overcoming the maintenance cost of the current detection means high cost for taking turns tyre defect, equipment high and larger to harm.It is by computer,Signal conversion circuit,Signal amplification circuit,Address decoding circuitry,Microwave generator,Several switches,Microwave transmitting antenna array microwave antenna array and display are constituted,Each microwave transmitting antenna array is made up of several microwave transmitting antennas for being arranged in matrix,Each microwave antenna array is made up of several microwave antennas for being arranged in matrix,Microwave transmitting antenna array is disposed adjacent with microwave antenna array and is mutually angle,The input of each microwave transmitting antenna is connected in the output end of microwave generator by a switch respectively,The output end of each microwave antenna is connected on the input of signal amplification circuit by a switch respectively,The output end of microwave generator and the output end of signal amplification circuit connect the input of signal conversion circuit respectively,The output end of signal conversion circuit connects the input of computer,The display output end of computer connects the input of display,The input of the control output end link address decoding circuit of computer,The output end of address decoding circuitry is connected on the controlled end of each switch.
During utility model works, the examined tire of rotation is pressed close to microwave transmitting antenna array and microwave antenna array simultaneously, the microwave signal that microwave generator sends 6.5~50GHz is launched by microwave transmitting antenna to tire, if defective in tire, microwave is scattered in fault location, and this scattering can be received by each microwave antenna.The microwave transmitting antenna that computer allows in microwave transmitting antenna array in order launches microwave in turn, microwave antenna array received microwave signal forms one group of vector signal, each vector signal one microwave antenna of correspondence, one microwave of microwave transmitting antenna transmitting of each column vector signal correspondence, the vector signal of all groups is after signal amplifies and signal is converted, calculated by computer and synthesize picture point, so that it is determined that in tire defect three-dimensional position, the various defect images for carrying out inside tires are reconfigured, and are shown in the display.Because the cost of microwave device is less than X-ray apparatus, harmfulness for human body is small, it is easy to protection, the reliability of device is high, fault rate is low, long lifespan, therefore the shortcoming of radial-ply tyre X-ray detecting equipment is overcome, and, good combination property high to defects detection definition, can effectively realize the nondestructive inspection of this kind of object with labyrinth of steel cord radial-ply tyre, it is also possible to which expansion is applied to non-all-steel cord radial-ply tyre --- in the nondestructive inspection of aromatic polyamide cord radial-ply tyre.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model, and Fig. 2, Fig. 3 and Fig. 4 are the principle schematics of microwave focal imaging method, and Fig. 5 is the structural representation of microwave transmitting antenna array 7 and microwave antenna array 8 in implementation method two, and Fig. 6 is the A-A sectional views of Fig. 5.
Specific embodiment
Specific embodiment one：Present embodiment is illustrated with reference to Fig. 1.Present embodiment is by computer 1,Signal conversion circuit 2,Signal amplification circuit 3,Address decoding circuitry 4,Microwave generator 5,Several switches 6,Microwave transmitting antenna array 7,Microwave antenna array 8 and display 9 are constituted,Each microwave transmitting antenna array 7 is made up of several microwave transmitting antenna 7-1 for being arranged in matrix,Each microwave antenna array 8 is made up of several microwave antenna 8-1 for being arranged in matrix,Microwave transmitting antenna array 7 is disposed adjacent with microwave antenna array 8 and is mutually angle,The input of each microwave transmitting antenna 7-1 is connected in the output end of microwave generator 5 by a switch 6 respectively,The output end of each microwave antenna 8-1 is connected on the input of signal amplification circuit 3 by a switch 6 respectively,The output end of microwave generator 5 and the output end of signal amplification circuit 3 are connected respectively to the input of signal conversion circuit 2,The output end of signal conversion circuit 2 connects the input of computer 1,The display output end of computer 1 connects the input of display 9,The input of the control output end link address decoding circuit 4 of computer 1,The output end of address decoding circuitry 4 is connected on the controlled end of each switch 6.The switch 6 is controllable electronic switch.The microwave signal of 45MHZ~50GHZ can be transformed into data signal, be used for computer by the Network Analyzer of the HP8510C models that the signal conversion circuit 2 is produced from Hewlett-Packard, the instrument.
The theory and its algorithm of the utility model foundation microwave focal imaging method, the microwave that the microwave transmitting antenna array 7 received by processing microwave antenna array 8 is launched is through the scattering field signal after tire defect scattering, to carry out the restructuring of the various defect images of inside tires, realize carrying out on-line monitoring to the quality of production for producing radial process in batches, defective work is separated from production line.The characteristics of microwave focal imaging method is：1) focal imaging is not really to gather some microwave, but by software (digital focus operator), by the microwave conversion of the transmitting of each antenna to a bit；2) transmission signal and reception signal focus are in same point；3) focal imaging method can be used for two and three dimensions imaging, and during three-dimensional imaging, aerial array will be flat shape.4) focal imaging method need not be with detection signal during zero defect as reference quantity, the scattering field signal that it is directly received according to reception antenna, synthesis defect point immediately arrives at position and the form of defect, without other identification unit in the field intensity value of the picture of focus point.5) it can all show any defect in effective imaging region.6) the antenna element number of receiving antenna array and transmitting antenna array can be with different, and as the two number increases, imaging will be more and more clear.
The process of microwave focal imaging is simply introduced with reference to Fig. 2：If as shown in Fig. 2 dry aerial constitutes two group pattern antennas to be respectively used to transmission signal and receive signal, by software (digital focus operator) rather than with hardware, a point of the signal focus inside testee.This enables a system to quickly scan the focus point and the inswept tested region including including a large amount of measurement points.Using this double-focusing method, the focusing to both transmitting and receiving array signal is realized, the resolution ratio for reconstructing image can be improved.
As shown in figure 3, using N when microwave transmitting antenna array 7 and the use two-dimensional structure of microwave antenna array 8n×NmIndividual antenna, NnIndividual composition emission array, NmIndividual composition receiving array.For a transmitting antenna specified, receiving array will be scanned, and have N to obtain onemThe column vector that individual element is constituted, therefore for NnIndividual transmitting antenna, will form a Nn×NmCalculation matrix.Electromagnetic compensation principle is followed, by the object of microwave irradiation such as fracture of wire or bubble equivalent current density will be caused to redistribute, using the current density, object can be imaged.Reassembly algorithm is to form each picture point using the synthesis of two focusing arrays, and each array all elements focuses on unique focus using focusing operator.Focusing operator can be obtained by the inverse operation of the field to being produced by electric current line, i.e., by field to electric current.
As shown in figure 4, it is the object of three-dimensional (including defect) imaging system when microwave transmitting antenna array 7 and microwave antenna array 8 are using three-dimensional structure.Many flat plane antennas form array, for launching and receiving signal.They focus on a bit inside testee by digital focus operator.Restructing algorithm forms each picture point by comprehensive two groups of focusing arrays (transmitting and reception).All of antenna element is all adjusted by focusing operator and focuses on unique focus.The picture of object passes through a Nt×NrCalculation matrix is obtained.Here NtRefer to the sum of all emission arrays, NrIt refer to the sum of all receiving arrays.This Nt×NrCalculation matrix is obtained by the following method：For each selected antenna element, receiving array is scanned, so as to obtain by NrOne column vector of individual element composition.Repeat NtIt is secondary, you can to form calculation matrix.Focusing operator is obtained by carrying out inverse operation to the field produced by point electric current source.
Specific embodiment two：Present embodiment is illustrated with reference to Fig. 5 and Fig. 6.Present embodiment is with the difference of implementation method one：Microwave transmitting antenna array 7 arranges totally six ten four microwave transmitting antenna 7-1 and constitutes by eight rows eight, microwave antenna array 8 arranges totally six ten four microwave antenna 8-1 and constitutes by eight rows eight, each microwave transmitting antenna 7-1 and microwave antenna 8-1 is by the earth plate 21 that is stacked each other, insulating barrier 22, microstrip line 23 and metallic reflection plate 24 are constituted, gap 21-1 is provided with the upper surface of earth plate 21 along its length, microstrip line 23 is perpendicular to gap 21-1 and is arranged between earth plate 21 and insulating barrier 22, metallic reflection plate 24 is arranged at the lower surface of insulating barrier 22.When present embodiment works, microstrip line 23 connects microwave transmission feeder line, transmitting the signal for coming transmitting by microwave transmission feeder line or the microwave signal for receiving be conveyed to computer 1 by microwave transmission feeder line, gap 21-1 is provided with earth plate 21, gap 21-1 ensure that the direction of the launch of microwave by the energy-activation in microstrip line, metallic reflection plate 24.The microwave transmitting antenna 7-1 and microwave antenna 8-1 of present embodiment belong to microstrip antenna, and it has the following advantages compared with conventional microwave antenna：1) thin profile, easily the outer round surface with detected tyre is conformal；2) small volume, lightweight, low cost, it is easy to a large amount of productions., using the gap 21-1 being opened on earth plate, microstrip line feeds to it and to external radiation, has the advantages that low-cross polarization for it, and by feeding network and radiating element relative separation, so as to the influence feeder line to antenna pattern is minimized.Insulating barrier 22 is it can also be provided that cavity.
Claims (2)
1st, the microwave focal imaging method detection means of rotating radial tyre defect, it is characterised in that it is by computer（1）, signal conversion circuit（2）, signal amplification circuit（3）, address decoding circuitry（4）, microwave generator（5）, several switch（6）, microwave transmitting antenna array（7）, microwave antenna array（8）And display（9）Composition, each microwave transmitting antenna array（7）By the rectangular microwave transmitting antenna of several arrangements（7-1）Composition, each microwave antenna array（8）By the rectangular microwave antenna of several arrangements（8-1）Composition, microwave transmitting antenna array（7）With microwave antenna array（8）Angle is disposed adjacent and is mutually, each microwave transmitting antenna（7-1）Input respectively by one switch（6）It is connected to microwave generator（5）Output end on, each microwave antenna（8-1）Output end respectively by one switch（6）It is connected to signal amplification circuit（3）Input on, microwave generator（50 output end and signal amplification circuit（3）Output end be connected respectively to signal conversion circuit（2）Input, signal conversion circuit（2）Output end connection computer（1）Input, computer（1）Display output end connection display（9）Input, computer（1）Control output end link address decoding circuit（4）Input, address decoding circuitry（4）Output end be connected to each switch（6）Controlled end on.
2nd, the microwave focal imaging method detection means of rotating radial tyre defect according to claim 1, it is characterised in that each microwave transmitting antenna（7-1）And microwave antenna（8-1）Earth plate all by being stacked each other（21）, insulating barrier（22）, microstrip line（23）And metallic reflection plate（24）Composition, earth plate（21）Upper surface on be provided with gap along its length（21-1）, microstrip line（23）Perpendicular to gap（21-1）And it is arranged on earth plate（21）With insulating barrier（22）Between, metallic reflection plate（24）It is arranged on insulating barrier（22）Lower surface at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520021958 CN2837838Y (en) | 2005-11-16 | 2005-11-16 | Apparatus for microwave focusing imaging detection of radial tire defect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200520021958 CN2837838Y (en) | 2005-11-16 | 2005-11-16 | Apparatus for microwave focusing imaging detection of radial tire defect |
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| CN2837838Y true CN2837838Y (en) | 2006-11-15 |
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| CN 200520021958 Expired - Fee Related CN2837838Y (en) | 2005-11-16 | 2005-11-16 | Apparatus for microwave focusing imaging detection of radial tire defect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101896865B (en) * | 2007-12-19 | 2011-12-14 | 米其林技术公司 | Device for evaluating the surface of a tyre |
| JP2018077192A (en) * | 2016-11-11 | 2018-05-17 | 東洋ゴム工業株式会社 | Tire inspection device and inspection method |
| CN110044933A (en) * | 2019-03-27 | 2019-07-23 | 上海航天精密机械研究所 | Phased array microwave imaging non-destructive detection device and method |
| CN111380705A (en) * | 2018-12-26 | 2020-07-07 | 通伊欧轮胎株式会社 | Tire inspection device |
-
2005
- 2005-11-16 CN CN 200520021958 patent/CN2837838Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101896865B (en) * | 2007-12-19 | 2011-12-14 | 米其林技术公司 | Device for evaluating the surface of a tyre |
| JP2018077192A (en) * | 2016-11-11 | 2018-05-17 | 東洋ゴム工業株式会社 | Tire inspection device and inspection method |
| CN111380705A (en) * | 2018-12-26 | 2020-07-07 | 通伊欧轮胎株式会社 | Tire inspection device |
| CN110044933A (en) * | 2019-03-27 | 2019-07-23 | 上海航天精密机械研究所 | Phased array microwave imaging non-destructive detection device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061115 Termination date: 20101116 |