CN105302961A - Three-dimensional photography technology based folded pipe field measurement method - Google Patents
Three-dimensional photography technology based folded pipe field measurement method Download PDFInfo
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- CN105302961A CN105302961A CN201510719563.0A CN201510719563A CN105302961A CN 105302961 A CN105302961 A CN 105302961A CN 201510719563 A CN201510719563 A CN 201510719563A CN 105302961 A CN105302961 A CN 105302961A
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Abstract
The invention discloses a three-dimensional photography technology based folded pipe field measurement method. The method comprises the following steps: (1) arranging a plurality of mark points on a flange and a pipe, and placing encoded points in a spatial position near to-be-measured flange and pipe; (2) performing multi-angle shooting around the pipe and the flange by using a camera or a video camera; (3) copying and storing all shot photos in a computer, and automatically and quickly calculating contour data and spatial relative position data of the pipe and the flange by utilizing three-dimensional photography software; (4) importing the obtained data into Geomagic software, and performing fitting modeling by utilizing the software to form required pipe and flange; and (5) performing analytic processing on 3D data by utilizing related three-dimensional drawing software, drawing a required folded pipe processing drawing, and outputting the drawing in a PDF format. The measurement method is simple, convenient and high in measurement precision, is slightly influenced by factors such as environment and the like, is not influenced by factors of space and light, and is relatively high in anti-jamming capability.
Description
Technical field
The present invention relates to a kind of gathering pipe on-site measurement method based on three-dimensional photographic technology, be applied to the manufacture processing of gathering pipe.
Background technology
Be paved with pipeline everywhere inside boats and ships, a series of operations such as the design of these pipe fittings, manufacture and the inspection after in board installing are referred to as " pipeline laying ".Usual boats and ships are sectional constructions, and the pipeline intersegmental in the segment folding time-division just needs gathering pipe to connect, but rely on pipeline design drawing to produce gathering pipe miscellaneous, and the making of gathering pipe adopts usually gets type method and site welding connection.
The most difficult in pipeline makes is " ensureing the precision that finished product is good ".But it is incorrect to adopt two kinds of methods above often to there will be the gathering pipe flange bolt empty position produced, situation about cannot install is caused to occur.There is the shortcomings that efficiency is low, waste of material serious and machining precision is not high in these two kinds of methods.At present, the states such as Japan and Korea S develop closed tube reproduction system for the problems referred to above, the locus feature of the flange of gathering pipe is treated by tactful machine in-site measurement two, then this locus feature is simulated by special fitting software, and export controling parameters, coordinate special three-dimensional positioner can reproduce the position feature of two flanges, the gathering pipe manufactured is lifted on reproduction machine and can produces free from error gathering pipe with flange welding.What wherein measuring equipment adopted is single stay cord measuring machine with two angular transducers and a linear transducer, and its cardinal principle uniquely can determine a point in spheric coordinate system two angles specified and a length.Therefore, the position mark of unique point in the coordinate system of specifying on flange can be measured by this measuring machine.But the weak point of this kind of measuring method needs repeatedly to adjust the position of rope outlet when being and measuring, to ensure that stay cord is linear state, this operating process is loaded down with trivial details.For solving this kind of present situation, develop closed tube reproduction system 201110309478.9, the locus feature of the flange of gathering pipe is treated by measuring machine in-site measurement two, then this locus feature is simulated by special fitting software, and export controling parameters, coordinate special three-dimensional positioner can reproduce the position feature of two flanges, the gathering pipe manufactured is lifted on reproduction machine and can produces free from error gathering pipe with flange welding.For obtaining the characteristic parameter treating the flange of gathering pipe, Three-Coordinate Measuring Arm is adopted also to be feasible scheme, this gage beam is connected in series by 6 rotary joints by 6 arms rotated and 1 measuring head, in each joint, angled scrambler is installed, one section of gage beam is fixed on pedestal, irremovable in measuring process, and measuring head can move at space free, form one and close spherical measurement space, each joint rotation angle and component corner is obtained by the optoelectronic angle scrambler being arranged on each joint and rod member inside, at the brachium in conjunction with each joint arm, interarticular angle etc., apply coordinate model thus the three-dimensional coordinate position of acquisition measured point.Use the characteristic parameter of gage beam measurement flange very convenient, only need to get a little at feature locations, then namely required characteristic parameter is calculated by software, and these characteristic parameters need not be known in advance, but the limited length of this gage beam and the expensive of gage beam, each joint of external pelivimetry arm is all weak link, if in use collide, very easily damages.The ultimate principle of the gathering pipe measuring machine in 201110323558.X adopts three pulling rope length sensors in triangle distribution as measuring original paper, under Descartes's rectangular coordinate system, go out fag end as spherical equation using three pulling rope length sensors, treated the spherical co-ordinate of the locus of gathering pipe flange by high-precision measuring equipment subsidiary.Owing to there is certain gap between stay cord and stay cord head, ensure that stay cord can pull out smoothly, thus cause stay cord head to produce small deviation as the axial centerline of the centre of sphere, make the locus of gathering pipe to be measured produce deviation; And due to the permanent stay cord effect of stay cord, the elastic telescopic of stay cord causes the precision of closing up greatly to reduce, and stay cord generation wearing and tearing cause the damage of stay cord, the performance that impact is measured and work efficiency and increase the input of cost, for this reason a kind of more simple, measuring accuracy is higher and the portable gathering pipe measuring method that is not easily disturbed is that device fabrication business equipment uses enterprise to be happy to expectation.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of gathering pipe on-site measurement method based on three-dimensional photographic technology, measuring method is simple and convenient, measuring accuracy is high, measuring method is less by the impact of the factors such as environment, not by the impact of the factors such as space, light, position, antijamming capability is stronger.
Technical scheme: for solving the problems of the technologies described above, a kind of gathering pipe on-site measurement method based on three-dimensional photographic technology of the present invention, comprises the following steps:
(1) stick a circle apart from first flange 30 ~ 50cm end around the first pipe be no less than the monumented point of three and stick at the outer surface of the first flange the monumented point that a circle is no less than three, stick at least three monumented points at one of them bolt hole edge, the sealing surface side of the first flange, the first flange sealing surface sticks along the first flange Internal periphery the monumented point being no less than three; Distance second flange 30 ~ 50cm end is sticked a circle around the second pipe and is no less than the monumented point of three and sticks at the outer surface of the second flange the monumented point that a circle is no less than three, sticks at one of them bolt hole edge, the sealing surface side of the second flange the monumented point being no less than three; Second flange sealing surface sticks along the second flange Internal periphery the monumented point being no less than three, be positioned at the placement of the locus near flange to be measured and pipe at least 40 encoded points, encoded point is placed on the locus of Different Plane, and around the measurement being positioned at pipe to be measured and flange, and the distance of pipe to be measured and flange is between 30 ~ 50cm, the distance of adjacent encoder point is 30 ~ 50cm, ensures the locus that can be highlighted pipe to be measured and flange in different shooting process by the locus of encoded point;
(2) multi-angled shooting is carried out with camera or video camera around the first pipe, the first flange, the second pipe and the second flange;
(3) all photo copies of shooting are stored in computer, utilize 3-D photography software automatically to calculate the first pipe, the first flange, the second pipe and the second flange outline data fast, and its relative space position data;
(4) to the data importing Geomagic software obtained, utilize this software to carry out matching modeling and form required pipe and flange;
(5) utilize relevant three-dimensional drawing software to the process of 3D data analysis, the gathering pipe processing drawing needed for drafting, this drawing exports with PDF, directly prints.
As preferably, in described step (1), monumented point center is circular white point, is around square black matrix.
As preferably, in described step (2), monumented point and specific encoded point is comprised in the photo of shooting, different angles shooting photo 10 ~ 20 for demarcate, camera or video camera are under AUTO gear, and shooting focal length remains unchanged, and offers flashlamp, screening-mode is white-black pattern, and light sensitivity is 100 ~ 200.
As preferably, in described step (3), 3-D photography software is first utilized automatically to extract the contour point data of pipe and flange, the more blue sealing surface outline data of Automatic extraction, the last three-dimensional data automatically generating pipe and flange.
As preferably, Geomagic software utilizes the three-dimensional model of outline data matching first pipe of three-dimensional point cloud editor first pipe, the first flange, the second pipe and the second flange, the first flange, the second pipe and the second flange in described step (4), and determines locus.
As preferably, step 5 described) in, utilize Pro/E or solidworks software to carry out analyzing and processing to three-dimensional model, have pipe and flange three-dimensional plot intuitively, and the center of circle and center line, and utilize center line and the gathering pipe manuscript needed for the accurate Drawing of the center of circle.
Beneficial effect: compared with prior art, the present invention has the following advantages:
(1) this measuring method is simple and convenient, the measuring accuracy avoiding the existence of Mechanical measurement method is difficult to ensure, length consuming time, the shortcomings such as efficiency is low, only need simply pipe and flange surface profile labelling point with place specific scrambler, and photograph, utilize specific software Measurement and analysis process data, finally draw gathering pipe processing drawing and be directly used in the manufacturing, save a large amount of labour cost and labour intensity, adopt and in this way gathering pipe is measured, save a large amount of time and raise the efficiency;
(2) this gathering pipe on-site measurement method measuring accuracy based on three-dimensional photographic technology is high, and measuring method is less by the impact of the factors such as environment, and not by the impact of the factors such as space, light, position, antijamming capability is stronger;
(4) the method is adopted to measure safe and reliable measurement accurately very high, whole measuring process is convenient, measurable gathering pipe length range is large, the engine request of gathering pipe can be met completely and measure requirement, provide great convenience for manufacturing gathering pipe simultaneously, there is great economic benefit and marketable value;
(5) this measuring method is simple to operation, can continuous repetition, is convenient to gathering pipe and is assemblied in manufacture, be applicable to large-scale promotion and application.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the embodiment of the present invention.
Fig. 2 is the structural representation of monumented point of the present invention;
Fig. 3 is the schematic diagram of the first flange in the present invention;
Fig. 4 is the schematic diagram of the first pipe of the present invention.
Embodiment
As shown in Figure 1, a kind of gathering pipe on-site measurement method based on three-dimensional photographic technology, comprises the following steps:
(1) a circle monumented point 1 is sticked around the first pipe 4 in distance the first flange 240cm end, and as shown in Figure 2, monumented point 1 center is circular white point to monumented point 1, is around square black matrix, sticks a circle monumented point 1 at the outer surface of the first flange 2; In the sealing surface side of the first flange 2, a bolt hole 3 edge labelling point 1 wherein, the circular edge pasting 10 monumented points 1 keeps aliging with bolt hole 3 edge, 20 monumented points 1 are sticked along the first flange 2 Internal periphery equally on the first flange 2 sealing surface, its circular edge keeps aliging with blue Internal periphery edge, as shown in Figure 3 and Figure 4; In the same way with mode at the second pipe and the enterprising line operate of the second flange, place the encoded point of at least 40 being positioned at the locus near flange to be measured and pipe, the plan positional relationship of encoded point and encoded point is 40cm;
(2) three-dimensional photographic technology is utilized at least to carry out 4 different angles shootings to pipe and flange, monumented point 1 and specific encoded point is comprised in the photo of shooting, the photo of different angles shooting is at 16, photo at least has 5 specific encoded points for demarcating, and the camera of three-dimensional photographic technology is under AUTO gear, and shooting focal length remains unchanged, keep stable not rock, offer flashlamp, screening-mode is white-black pattern, and light sensitivity is 150;
(3) all photo copies of shooting are stored in computer, utilize 3-D photography software automatically to calculate the first pipe 4, first flange 2, second pipe and the second flange outline data fast, and its relative space position data;
(4) to the data importing Geomagic software obtained, this software is utilized first automatically to extract the contour point data of pipe and flange, the blue sealing surface outline data of Automatic extraction again, the last three-dimensional data automatically generating pipe and flange, matching modeling forms required pipe and flange;
(5) utilize relevant three-dimensional drawing software to the process of 3D data analysis, thus have pipe and flange three-dimensional plot intuitively, and the center of circle, center line and spatial relation, and utilize center line and the gathering pipe processing drawing needed for the drafting of the gathering pipe manuscript needed for the accurate Drawing of the center of circle, this drawing exports with PDF, directly prints.
In step (3), the first pipe 4 sticks a circle monumented point 1, by the diameter to the first pipe 4 of image procossing.The outer surface of the first flange 2 sticks a circle monumented point 1, is obtained by image procossing, can determine the external diameter size of the first flange 2.Paste 10 monumented points 1 at bolt hole 3 edge, the circular edge of monumented point 1 keeps aliging with bolt hole 3 edge, obtains the size of bolt hole 3 and can reach the position of bolt hole 3 center of circle relative known coded point in space by image procossing.First flange 2 sealing surface sticks 20 monumented points 1 along the first flange 2 Internal periphery, by image procossing, can the size of known first flange 2 internal diameter and the position of the first flange 2 internal diameter relative known coded point in space.In like manner, the related data of the second flange and the second pipe can be obtained.Utilize given data, by data importing in Geomagic software, this software is utilized first automatically to extract the contour point data of pipe and flange, the more blue sealing surface outline data of Automatic extraction, the last three-dimensional data automatically generating pipe and flange, matching modeling forms required pipe and flange.Modeling is formed in the first required pipe 4, first flange 2, second pipe and the second flange importing three-dimensional drawing software, the gathering pipe processing drawing needed for drafting.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1., based on a gathering pipe on-site measurement method for three-dimensional photographic technology, it is characterized in that, comprise the following steps:
(1) stick a circle apart from first flange 30 ~ 50cm end around the first pipe be no less than the monumented point of three and stick at the outer surface of the first flange the monumented point that a circle is no less than three, stick at least three monumented points at one of them bolt hole edge, the sealing surface side of the first flange, the first flange sealing surface sticks along the first flange Internal periphery the monumented point being no less than three, distance second flange 30 ~ 50cm end is sticked a circle around the second pipe and is no less than the monumented point of three and sticks at the outer surface of the second flange the monumented point that a circle is no less than three, the monumented point being no less than three is sticked at one of them bolt hole edge, the sealing surface side of the second flange, second flange sealing surface sticks along the second flange Internal periphery the monumented point being no less than three, be positioned at the placement of the locus near flange to be measured and pipe at least 40 encoded points, encoded point is placed on the locus of Different Plane, the distance of adjacent encoder point is 30 ~ 50cm, and around the measurement being positioned at pipe to be measured and flange, and the distance of pipe to be measured and flange is between 30 ~ 50cm,
(2) multi-angled shooting is carried out with camera or video camera around the first pipe, the first flange, the second pipe and the second flange;
(3) all photo copies of shooting are stored in computer, utilize 3-D photography software automatically to calculate the first pipe, the first flange, the second pipe and the second flange outline data fast, and its relative space position data;
(4) to the data importing Geomagic software obtained, utilize this software to carry out matching modeling and form required pipe and flange;
(5) utilize relevant three-dimensional drawing software to the process of 3D data analysis, the gathering pipe processing drawing needed for drafting, this drawing exports with PDF, directly prints.
2. the gathering pipe on-site measurement method based on three-dimensional photographic technology according to claim 1, it is characterized in that: in described step (1), monumented point center is circular white point, surrounding is square black matrix, the circular edge of monumented point keeps aliging with the bolt hole edge of the first flange and the second flange, and the circular edge of monumented point all keeps aliging with the Internal periphery edge of the first flange and the second flange.
3. the gathering pipe on-site measurement method based on three-dimensional photographic technology according to claim 1, it is characterized in that: in described step (2), monumented point and specific encoded point is comprised in the photo of shooting, different angles shooting photo 10 ~ 20 for demarcate, camera or video camera are under AUTO gear, and shooting focal length remains unchanged, and offers flashlamp, screening-mode is white-black pattern, and light sensitivity is 100 ~ 200.
4. the gathering pipe on-site measurement method based on three-dimensional photographic technology according to claim 1, it is characterized in that: in described step (3), first utilize 3-D photography software automatically to extract the contour point data of pipe and flange, the blue sealing surface outline data of Automatic extraction again, the last three-dimensional data automatically generating pipe and flange.
5. the gathering pipe on-site measurement method based on three-dimensional photographic technology according to claim 1, it is characterized in that: Geomagic software utilizes the three-dimensional model of outline data matching first pipe of three-dimensional point cloud editor first pipe, the first flange, the second pipe and the second flange, the first flange, the second pipe and the second flange in described step (4), and determines locus.
6. the gathering pipe on-site measurement method based on three-dimensional photographic technology according to claim 5, it is characterized in that: the step 5 described) in, Pro/E or solidworks software is utilized to carry out analyzing and processing to three-dimensional model, have pipe and flange three-dimensional plot intuitively, and the center of circle and center line, and utilize center line and the gathering pipe manuscript needed for the accurate Drawing of the center of circle.
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Cited By (9)
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| CN105674904A (en) * | 2016-04-21 | 2016-06-15 | 哈尔滨工业大学 | Novel steam turbine flow passage clearance detection method with intelligent assembling characteristic |
| CN106524946A (en) * | 2016-10-27 | 2017-03-22 | 西南科技大学 | Marine riser automatic connection detection device |
| CN107449378A (en) * | 2017-07-21 | 2017-12-08 | 辽宁科技大学 | A kind of test of rock surface degree of roughness and computational methods based on 3-D view |
| CN109458927A (en) * | 2018-10-18 | 2019-03-12 | 上海船舶工艺研究所(中国船舶工业集团公司第十研究所) | A method of showing the measurement of school pipe for ship |
| CN109737885A (en) * | 2019-02-28 | 2019-05-10 | 沈阳航空航天大学 | A kind of deformation quantity measuring method of composite material parts |
| CN110044259A (en) * | 2019-04-04 | 2019-07-23 | 上海交通大学 | A kind of gathering pipe flexible measurement system and measurement method |
| CN110455183A (en) * | 2019-07-26 | 2019-11-15 | 国营芜湖机械厂 | A kind of BDAR both aviation conduit mapping system and method |
| CN110514180A (en) * | 2019-07-18 | 2019-11-29 | 舟山中远海运重工有限公司 | The method restored based on photogrammetric pipe fitting and flange pose |
| CN112129221A (en) * | 2020-09-04 | 2020-12-25 | 中船黄埔文冲船舶有限公司 | Prefabricated measuring method for segmented folding pipe |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674904A (en) * | 2016-04-21 | 2016-06-15 | 哈尔滨工业大学 | Novel steam turbine flow passage clearance detection method with intelligent assembling characteristic |
| CN106524946A (en) * | 2016-10-27 | 2017-03-22 | 西南科技大学 | Marine riser automatic connection detection device |
| CN107449378A (en) * | 2017-07-21 | 2017-12-08 | 辽宁科技大学 | A kind of test of rock surface degree of roughness and computational methods based on 3-D view |
| CN107449378B (en) * | 2017-07-21 | 2019-08-20 | 辽宁科技大学 | A kind of test of rock surface degree of roughness and calculation method based on 3-D image |
| CN109458927A (en) * | 2018-10-18 | 2019-03-12 | 上海船舶工艺研究所(中国船舶工业集团公司第十研究所) | A method of showing the measurement of school pipe for ship |
| CN109737885A (en) * | 2019-02-28 | 2019-05-10 | 沈阳航空航天大学 | A kind of deformation quantity measuring method of composite material parts |
| CN110044259A (en) * | 2019-04-04 | 2019-07-23 | 上海交通大学 | A kind of gathering pipe flexible measurement system and measurement method |
| CN110044259B (en) * | 2019-04-04 | 2022-08-02 | 上海交通大学 | Folding pipe flexibility measuring system and measuring method |
| CN110514180A (en) * | 2019-07-18 | 2019-11-29 | 舟山中远海运重工有限公司 | The method restored based on photogrammetric pipe fitting and flange pose |
| CN110455183A (en) * | 2019-07-26 | 2019-11-15 | 国营芜湖机械厂 | A kind of BDAR both aviation conduit mapping system and method |
| CN112129221A (en) * | 2020-09-04 | 2020-12-25 | 中船黄埔文冲船舶有限公司 | Prefabricated measuring method for segmented folding pipe |
| CN112129221B (en) * | 2020-09-04 | 2022-03-15 | 中船黄埔文冲船舶有限公司 | Prefabricated measuring method for segmented folding pipe |
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