CN105519263B - Based on method and the system thereof of coding structure photo measure Planar Slot Antenna three-dimensional surface shape - Google Patents
Based on method and the system thereof of coding structure photo measure Planar Slot Antenna three-dimensional surface shapeInfo
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- CN105519263B CN105519263B CN2007100829734A CN200710082973A CN105519263B CN 105519263 B CN105519263 B CN 105519263B CN 2007100829734 A CN2007100829734 A CN 2007100829734A CN 200710082973 A CN200710082973 A CN 200710082973A CN 105519263 B CN105519263 B CN 105519263B
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Abstract
The present invention relates to a kind of method and system based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape.Planar Slot Antenna is fixed on test board by this system, adjustment CCD and LCD position, makes image large as far as possible, takes static Planar Slot Antenna image, calibration measurements system, certainty annuity parameter; Characteristics of image according to quiescent conditions shooting is encoded, and opens LCD, carries out coded structured light projection to tested antenna; Carry out image taking, according to the structure light image after antenna surface modulation projected to photographed and the deflection with original image, calculate the three-dimensional coordinate of each grid search-engine point of antenna surface, and complete data processing and data storing work, utilize the D coordinates value of antenna surface each point, matching obtains the three-dimensional appearance figure of whole antenna surface.The present invention can judge defect characteristic information easily and fast by corresponding feature identification and defect inspection program; Can measure the workpiece of 1m × 1m scope, its topography measurement precision reaches 3 × 10
-5m.<pb pnum="1" />
Description
One technical field
The invention belongs to measuring three-dimensional morphology technology, particularly a kind ofly measure large flat leaky antenna three-dimensional surface shape, flatness and carry out method and the system thereof of defect diagonsis.
Two background technologies
Large flat leaky antenna is most widely used airborne radar antenna, this antenna to design and requirement on machining accuracy very high, wherein the surface appearance feature of antenna is the factor of the most critical determining antenna telecommunication index, and the feature around aerial radiation gap is even more important.So the accurate measurement of Planar Slot Antenna three-dimensional surface shape has very important directive significance for the high performance Planar Slot Antenna of design and researching antenna actual emanations characteristic.Be limited to the limitation of testing apparatus and measuring technology, be all measured by three-coordinate instrument to the test of antenna surface pattern at present, slowly, efficiency is extremely low for its measuring speed.
Existing non-contact measurement means mainly contain: double electronic optical theodolite measurement, laser scanning measurement and digital photogrammetry etc.Electronic theodolite measuring system with two or multiple stage high-precision electronic transit for main sensors, in conjunction with other annex and system software, with angle forward intersection for ultimate principle, the three-dimensional coordinate measurement of implementation space point.Can reach 0.01-0.02mm to its measuring accuracy of workpiece of 1m size, but its weak point is the same with three-coordinates measuring machine, measuring speed is slow, and Measuring Time is long.The range measurement principle of laser scanner is divided into three kinds: one to be impulse method laser ranging, and two is the range findings of laser phase method, and three is laser triangulation range findings.Laser scanner can obtain the cloud data of magnanimity, is particularly useful for the three-dimensional modeling of entity, and its weak point is to measure (bad fine sight unique point) a certain specific point.And precision generally (all lower than 0.1mm) on the low side.Industrial digital photographic measuring is the digital picture of more than 2 width by obtaining same object in different positions and direction, obtains the accurate three-dimensional coordinate of tested point as calculated after the process such as machine images match and relevant mathematical computations.Its measuring principle is the same with electronic theodolite measuring system, is all triangle intersections, but the photogrammetric quality requirements to image is very high, and Surveying Actual Precision often cannot improve by the restriction of picture quality.
Three summary of the invention
The object of the present invention is to provide a kind of method based on coded structured light commercial measurement large flat leaky antenna surface topography and system.
The technical scheme realizing the object of the invention is: a kind of method based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape:
(1) be fixed on test board by Planar Slot Antenna to be measured, place CCD and LCD, ensure that CCD can photograph all antennas, LCD projects whole cover antenna region;
(2) by data line, CCD with LCD is connected computing machine, antenna diagram picture when taking static, demarcates CCD and LCD position according to gap size in image;
(3) structure light coding carried out to LCD and project to Planar Slot Antenna to be measured, utilizing the antenna rest image of shooting, around antenna crack, adopt fine works code, grid size 1mm, adopting thick coding in other region, grid size 2mm;
(4) CCD is connected by the guide rail be fixed on platform, and moving guide rail is the structured light topography of shooting after antenna surface modulation also, Computer Storage guide rail position and topography;
(5) repeat step (4), ensure that whole antenna is all photographed;
(6) in conjunction with guide rail position value, the image of shooting is spliced, and calculates the coordinate figure of each lattice point, and generating report forms;
(7) fit to three-dimensional appearance figure according to the coordinate figure of each lattice point, and in conjunction with design load, judge defective locations and defect level.
A kind of system realizing the above-mentioned method based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape, comprise guide rail, test board, LCD, CCD and the computing machine with square structure photodissociation code function software, Planar Slot Antenna to be measured is fixed on test board, place CCD and LCD, ensure that CCD can photograph all antennas, LCD projects whole cover antenna region, by data line, CCD with LCD is connected computing machine, CCD is connected by the guide rail be fixed on platform, first, Planar Slot Antenna is fixed on test board, if place CCD, and adjust CCD and LCD position, make image large as far as possible, take static Planar Slot Antenna image, according to the size in antenna gap in a stationary situation, calibration measurements system, certainty annuity parameter, characteristics of image according to quiescent conditions shooting is encoded, and adopts smart local code and the overall situation slightly to encode and combines, open LCD, coded structured light projection is carried out to tested antenna, carry out image taking, project to the structure light image on antenna and the deflection with original image according to what photograph, calculate the three-dimensional coordinate of each grid search-engine point of antenna surface, and complete data processing and data storing work, after being completed, utilize the D coordinates value of antenna surface each point, matching obtains the three-dimensional appearance figure of whole antenna surface.
The present invention compared with prior art, its remarkable advantage is: adopt encoded special structured light on Planar Slot Antenna surface, adopt high-resolution digital camera to obtain the structure light image after antenna surface modulation, obtained the accurate three-dimensional pattern of antenna surface by image processing method.Because the telecommunication Index Influence of the pattern around antenna surface radiating slot to antenna is most important, require especially high to the measuring accuracy around it, so the method adopting local fine works code (radiating slot district) to combine with slightly encode (other region) in actual coding process, defect characteristic information can also be judged easily and fast by corresponding feature identification and defect inspection program.Can be measured the workpiece of 1m × 1m scope by said method, its topography measurement precision reaches 3 × 10
-5m.This system realizes simple, and cost is very low; Simple to operate, the method has very strong versatility.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Four accompanying drawing explanations
Fig. 1 is the pie graph of the system based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape of the present invention.
Fig. 2 is the method flow diagram based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape of the present invention.
Fig. 3 (a) be the method based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape of the present invention grid coding schematic diagram, (b) be the present invention is based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape and square law device gap around fine works code plan schematic diagram.
Fig. 4 is certain antenna partial 3 d pattern design sketch of the method based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape of the present invention.
Five embodiments
Composition graphs 2, the present invention is based on the method for coding structure photo measure Planar Slot Antenna three-dimensional surface shape, step is as follows:
(1) Planar Slot Antenna 6 to be measured is fixed on test board 2, places CCD4 and LCD3, ensure that CCD4 can photograph all antennas 6, LCD3 and to project whole cover antenna region;
(2) by data line, CCD4 with LCD3 is connected computing machine 5, antenna diagram picture when taking static, demarcates CCD4 and LCD3 position according to gap size in image;
(3) structure light coding projection is carried out to LCD3, utilize the antenna rest image of shooting, around antenna crack 7, adopt fine works code, grid size 1mm, adopt thick coding in other region, grid size 2mm;
(4) the moving guide rail 1 also structured light topography of shooting after antenna surface modulation, computing machine 5 stores guide rail 1 position and topography;
(5) repeat step (4), ensure that whole antenna is all photographed;
(6) in conjunction with guide rail 1 positional value, the image of shooting is spliced, and calculates the coordinate figure of each lattice point, and generating report forms;
(7) fit to three-dimensional appearance figure according to the coordinate figure of each lattice point, and in conjunction with design load, judge defective locations and defect level.
Said method adopts the structured light after LCD transmitting classical prescription trellis coding in Planar Slot Antenna, adopt high-resolution digital camera to obtain the structure light image after antenna surface modulation simultaneously, by the deformation values of calculation code structure after antenna surface modulation, obtain the accurate three-dimensional pattern of antenna surface.Consider that the telecommunication Index Influence of the pattern around antenna surface radiating slot to antenna is extremely important, measuring accuracy around it requires higher, so when structure light coding, according to original design drawing of Planar Slot Antenna, adopt the method for fine works code around gap within the scope of 5mm, size of namely encoding is less, as shown in Fig. 3 (b), improve the measuring accuracy in this region, other flat area adopts the method for thick coding, improves software treatment effeciency.In addition, this invention can also according to the three dimensional topography of test, and contrast design value, directly judges defective locations and the defect characteristic of antenna surface.
Composition graphs 1, the platform that the system that the present invention is based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape comprises guide rail 1 and is arranged on guide rail 1, platform is provided with LCD optical projection system and CCD, and computing machine is connected, optical projection system comprises illuminator and the spatial light modulator be arranged in illumination path and projection lens, and spatial light modulator is connected with computing machine with image card by video distributor; Image card is Channel Image card, and monitor is connected with computing machine by this Channel Image card; CCD is connected by the guide rail be fixed on platform, and can with guide rail translation; Support is liftable support.Namely mainly comprise guide rail 1, test board 2, LCD3, a high-resolution digital camera CCD4, there is the composition such as computing machine 5 grade of square structure photodissociation code function software.First, Planar Slot Antenna 6 is fixed on test board 2, places camera CCD4, and adjust CCD4 and LCD3 position, make image large as far as possible, take static Planar Slot Antenna 6 image, according to the size in antenna gap 7 in a stationary situation, calibration measurements system, certainty annuity parameter; Characteristics of image according to quiescent conditions shooting is encoded, and adopts smart local code and the overall situation slightly to encode the coding method combined; Open LCD projector 3, coded structured light projection is carried out to tested antenna; Carry out image taking, according to the structure light image after antenna surface modulation projected to photographed and the deflection with original image, calculate the three-dimensional coordinate of each grid search-engine point of antenna surface, and complete data processing and data storing work.After being completed, utilize the D coordinates value of antenna surface each point, matching obtains the three-dimensional appearance figure of whole antenna surface.
Be explained as follows below in conjunction with certain radar Planar Slot Antenna exemplar:
1, tested antenna exemplar is fixed on test board, the normal direction level of antenna plane, ensures shooting effect;
2, place camera support and fixing high speed camera this case employing measurement type digital camera INCA3 at tested antenna surface annex (about 2 meters of distant places), guarantee that tested antenna surface all enters coverage, connect camera and computer control system;
3, first take antenna diagram as several, the test data according to subject picture and antenna gap in a stationary situation calculates CCD coordinate parameters;
4, utilize the antenna profile figure photographed, carry out structure light coding to antenna surface, this case adopts square coding as Fig. 3
5, open LCD and structured light projection is carried out to test antenna;
6, the structure light image after antenna surface modulation is gathered;
7, according to the deformation information of square structure light, the three-dimensional coordinate of each square central is calculated, and the flatness analysis carried out and three-dimensional appearance matching;
8, utilize measurement result and designing requirement, defects detection is carried out to antenna.
Claims (2)
1., based on a method for coding structure photo measure Planar Slot Antenna three-dimensional surface shape, it is characterized in that:
(1) be fixed on test board [2] by Planar Slot Antenna to be measured [6], place CCD [4] and LCD [3], guarantee CCD [4] can photograph all antennas [6], and LCD [3] projects whole cover antenna region;
(2) by data line, CCD [4] is connected computing machine [5] with LCD [3], antenna diagram picture when taking static, demarcates CCD [4] and LCD [3] position according to gap size in image;
(3) structure light coding carried out to LCD [3] and project to Planar Slot Antenna to be measured [6], utilize the antenna rest image of shooting, around antenna crack [7], adopt fine works code, grid size 1mm, thick coding is adopted, grid size 2mm in other region;
(4) CCD [4] connects by being fixed on guide rail [1] on platform, moving guide rail [1] the structured light topography of shooting after antenna surface modulation, and computing machine [5] stores guide rail [1] position and topography;
(5) repeat step (4), ensure that whole antenna is all photographed;
(6) in conjunction with guide rail [1] positional value, the image of shooting is spliced, and calculates the coordinate figure of each lattice point, and generating report forms;
(7) fit to three-dimensional appearance figure according to the coordinate figure of each lattice point, and in conjunction with design load, judge defective locations and defect level.
2. one kind realizes the system of the method based on coding structure photo measure Planar Slot Antenna three-dimensional surface shape according to claim 1, it is characterized in that: comprise guide rail [1], test board [2], LCD [3], CCD [4] and there is the computing machine [5] of square structure photodissociation code function software, Planar Slot Antenna to be measured [6] is fixed on test board [2], place CCD [4] and LCD [3], ensure that CCD [4] can photograph all antennas [6], LCD [3] projects whole cover antenna region, by data line, CCD [4] is connected computing machine [5] with LCD [3], CCD [4] is connected by the guide rail [1] be fixed on platform, first, Planar Slot Antenna [6] is fixed on test board [2], place CCD [4], and adjust CCD [4] and LCD [3] position, make image large as far as possible, take static Planar Slot Antenna [6] image, according to the size of antenna gap [7] in a stationary situation, calibration measurements system, certainty annuity parameter, characteristics of image according to quiescent conditions shooting is encoded, and adopts smart local code and the overall situation slightly to encode and combines, open LCD [3], coded structured light projection is carried out to tested antenna [6], carry out image taking, project to the structure light image on antenna and the deflection with original image according to what photograph, calculate the three-dimensional coordinate of each grid search-engine point of antenna surface, and complete data processing and data storing work, after being completed, utilize the D coordinates value of antenna surface each point, matching obtains the three-dimensional appearance figure of whole antenna surface.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106933006A (en) * | 2017-05-03 | 2017-07-07 | 苏州和氏设计营造股份有限公司 | The old captions expanding unit of numeral exhibition |
| CN114019485A (en) * | 2021-10-09 | 2022-02-08 | 北京控制工程研究所 | MEMS scanning mirror on-line training and calibrating method for laser radar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106933006A (en) * | 2017-05-03 | 2017-07-07 | 苏州和氏设计营造股份有限公司 | The old captions expanding unit of numeral exhibition |
| CN106933006B (en) * | 2017-05-03 | 2019-08-23 | 苏州和氏设计营造股份有限公司 | Number opens up old subtitle expanding unit |
| CN114019485A (en) * | 2021-10-09 | 2022-02-08 | 北京控制工程研究所 | MEMS scanning mirror on-line training and calibrating method for laser radar |
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