CN107560559B  A kind of prismshaped pipeline axial direction bending distortion measurement calculation method  Google Patents
A kind of prismshaped pipeline axial direction bending distortion measurement calculation method Download PDFInfo
 Publication number
 CN107560559B CN107560559B CN201710609129.6A CN201710609129A CN107560559B CN 107560559 B CN107560559 B CN 107560559B CN 201710609129 A CN201710609129 A CN 201710609129A CN 107560559 B CN107560559 B CN 107560559B
 Authority
 CN
 China
 Prior art keywords
 pipeline
 calculating
 bending
 pipeline axial
 calculation
 Prior art date
 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
 Active
Links
 238000004364 calculation method Methods 0.000 title claims abstract description 30
 238000005452 bending Methods 0.000 title claims abstract description 29
 238000005259 measurement Methods 0.000 title claims abstract description 23
 238000001514 detection method Methods 0.000 claims abstract description 12
 230000000875 corresponding Effects 0.000 claims description 9
 238000007689 inspection Methods 0.000 claims description 2
 238000010586 diagram Methods 0.000 description 6
 238000000034 method Methods 0.000 description 2
 230000001186 cumulative Effects 0.000 description 1
 238000009826 distribution Methods 0.000 description 1
 230000000694 effects Effects 0.000 description 1
 238000009776 industrial production Methods 0.000 description 1
Abstract
The invention discloses a kind of prismshaped pipeline axial direction bending distortion measurement calculation methods.The survey calculation method includes the survey calculation of three curvature calculating parameters and two twist calculating parameters, specific survey calculation method comprises the following steps: detection obtains the coordinates measurements of pipeline each measuring point along the outer profile in each section of axis, and calculates each section centerofmass coordinate；Utilize each section centroid calculation pipeline axial bending the first calculating parameter of degree；The second calculating parameter of pipeline axial bending degree and third calculating parameter are calculated in datum plane subpoint using each section mass center；It is projected on datum plane using the equation and apex coordinate on each section side of calculating, the first calculating parameter of pipeline axial torsion degree and the second calculating parameter are established in calculating.The present invention establishes multiple prismatic channel axial bending degree calculating parameters by detecting each section mass center of pipeline, and the twist calculating parameter of multiple prismatic channel axial directions is established with the projection of section the Fitting Calculation side and vertex on datum plane；Each section whole test point information is taken full advantage of, while multiple calculating parameters can reflect pipeline bending deformed state more comprehensively, improves the accuracy that prismatic channel axial direction bending distortion measurement determines.
Description
Technical field
The invention belongs to detection technique field, in particular to a kind of prismshaped pipeline axial direction bending distortion measurement calculating side
Method.
Background technique
Prismshaped pipeline and correlative tubular class part are widely used in the industrial production, in complicated work condition environment, by
Making pipeline under the action of the factors such as high temperature, high pressure and mechanical presses, deformation occurs, causes its ability of losing the job.Cause
This, needs accurately to detect pipeline and tubulose class part and make calculating and determines.It is detected by sensor and obtains pipeline
The coordinate value of each test point on outer profile handles each test point coordinate value by certain survey calculation method, obtains
Reflect every calculating parameter of pipeline axial direction bending deformation.
In existing survey calculation method, pipeline axial direction bending distortion measurement calculating parameter is not perfect, not can accurately reflect
The practical deformation situation of pipeline.For the survey calculation of axial bending degree, is established and calculated using the relationship of the adjacent test point in each section
Parameter does not consider section overall condition, and calculating parameter is insufficient, not accurate enough to the survey calculation of axial bending degree；For axis
The survey calculation of twist there are no more targetedly survey calculation method.Therefore, in order to be made accurately to pipeline bending deformation
Assessment, need to establish perfect measurement survey calculation method.
Summary of the invention
In view of abovementioned deficiencies of the prior art, the invention proposes a kind of measurements of prismshaped pipeline axial direction bending distortion measurement
Calculation method improves the accuracy of pipeline deformation assessment for improving pipeline bending distortion measurement survey calculation method.
The present invention to achieve the goals above, proposes a kind of prismshaped pipeline axial direction bending distortion measurement calculation method, institute
Stating survey calculation method includes three curvature calculating parameters and two twist calculating parameters, and the survey calculation method is specific
It comprises the following steps:
(1) detection obtains the coordinates measurements of pipeline each measuring point along the outer profile in each section of axisWherein j
For each section serial number, i is measuring point serial number on section；
(2) pass through the coordinates measurements of each measuring point on the outer profile in each sectionCalculate each section mass center
Coordinate
(3) it calculates in pipeline axial direction and contains each section mass centerSmallest circle cylinder diameter value,
As pipeline axial bending the first calculating parameter of degree
(4) along pipeline theory axis direction, by each section mass centerIt projects on datum plane,
The minimum envelop radius of circle value for calculating each mass center subpoint, as pipeline axial bending the second calculating parameter of degree r_{m}；
(5) the round heart O of minimum envelop of each mass center subpoint is calculated_{2}(x_{e},y_{e}), with the mass center in theoretical sectionWith the round heart O of the minimum envelop_{2}(x_{e},y_{e}) distance value, as pipeline axial bending degree third calculate
Parameter h,
(6) pass through the coordinates measurements of each measuring point on the outer profile in each sectionThe Fitting Calculation obtains each section
Detect side equation in faceWherein k is section side serial number；Each side in section is projected on datum plane again,
The maximum value of the corresponding projection side angle in each section is the first calculating parameter of pipeline axial torsion degree on datum plane
Wherein, m and n be section serial number, m=1,2,3 ..., n=1,2,3 ...
(7) pass through the coordinates measurements of each measuring point on the outer profile in each sectionEach section inspection is calculated
Survey apex coordinateWherein l is section vertex serial number；Vertex is detected into each sectionIt is flat to project to benchmark
Face, each section corresponding vertex is on datum plane with theoretical mass center line institute at maximum central angle
Section corresponding vertex is on datum plane with theoretical mass center line institute at minimum central angle
The maximum central angleWith the minimum central angleDifference is as pipeline axial torsion degree second
Calculating parameter ω_{l},
Detect apex coordinate in section described in abovementioned steps (7)For the intersection point on section side, by section side side
JourneyIt is calculated.
Said reference plane is the specified plane perpendicular to theoretical axis.
The beneficial effects of the present invention are: the present invention establishes multiple pipeline axial bending degree by detecting each section mass center of pipeline
Calculating parameter takes full advantage of each section whole test point information, while multiple calculating parameters can reflect that more comprehensively pipeline is curved
Bent deformed state；It is projected using section the Fitting Calculation side and vertex in datum plane, respectively obtains the corresponding projection side institute in each section
At maximum angle value and each section correspond to projected vertex distribution central angle value range, for calculating the torsion of pipeline axial direction
Degree, can accurately reflect pipeline torsional deflection, the perfect survey calculation method of pipeline axial direction bending shape changing detection.
Detailed description of the invention
Fig. 1 is prismshaped pipeline axial direction detection sectional plane schematic diagram.
Fig. 2 is the first calculating parameter of curvature schematic diagram.
Fig. 3 is curvature second and third calculating parameter schematic diagram.
Fig. 4 is the first calculating parameter of twist schematic diagram.
Fig. 5 is the second calculating parameter of twist schematic diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, being each detection sectional plane F of hexagonal crosssection prismshaped pipeline_{i}Schematic diagram is obtained each by detection
A section measuring point coordinateWherein j is each section serial number, and i is measuring point serial number on section.
As shown in Fig. 2, being each section mass centerMinimum envelop cylindrical surface, make the least square of each mass center
Middle line contains each center of mass point with the cylindrical surface of the parallel least squares of axis, seeks the minimum diameter that contains as pipeline axial direction
The first calculating parameter of curvatureApproximate calculation can be carried out such as with the maximum value d_max of each center of mass point to least squares
Under:
Wherein each section mass centerIt can be calculated with the methods of cumulative summation or triangle split plot design.
As shown in figure 3, each section mass center is projected on datum plane, pipeline axis along pipeline theory axis direction
It is the minimum envelop radius of circle value r of each mass center subpoint to the second calculating parameter of curvature_{m}, can be preferentially asymptotic using farthest point
Method solves radius value r_{m}With envelope circle central coordinate of circle O_{2}(x_{e},y_{e})。
Pipeline axial bending degree third calculating parameter is the mass center in theoretical sectionWith the most parcel
The round heart O of network_{2}(x_{e},y_{e}) distance value h:
As shown in figure 4, passing through the coordinate value of each measuring point on the outer profile in each sectionPass through least square
Fitting obtains each section detection side equationEach side in section is projected on datum plane, in datum plane
The maximum value of the upper corresponding projection side angle in each section is the first calculating parameter of pipeline axial torsion degree
Wherein, m and n is section serial number, and m=1,2,3 ..., n=1,2,3 ..., k is section side serial number.
As shown in figure 5, passing through section side equationEach section detection apex coordinate is calculatedWherein l is section vertex serial number.By the detection sectional plane vertex P_{l} ^{j}Project to datum plane, each section pair
Answer vertex on datum plane with theoretical mass center line institute at maximum central angle
Section corresponding vertex is on datum plane with theoretical mass center line institute at minimum central angle
The maximum central angleWith the minimum central angleDifference is as pipeline axial torsion degree second
Calculating parameter ω_{l},
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, it is clear that those skilled in the art
Member can carry out various changes and deformation to the present invention without departing from the spirit and scope of the present invention.If these of the invention are repaired
Change and deform and belong within the scope of claim and its equivalent technologies of the invention, then the present invention also comprising these changes and becomes
Including shape.
Claims (3)
1. a kind of prismshaped pipeline axial direction bending distortion measurement calculation method, the survey calculation method includes three curvature meters
It calculates parameter and two twist calculating parameters, the survey calculation method specifically includes the following steps:
(1) detection obtains the coordinates measurements of pipeline each measuring point along the outer profile in each section of axisWherein j is each
Section serial number, i are measuring point serial number on section；
(2) pass through the coordinates measurements of each measuring point on the outer profile in each sectionCalculate each section centerofmass coordinate
(3) it calculates in pipeline axial direction and contains each section mass centerSmallest circle cylinder diameter value, as
Pipeline axial bending the first calculating parameter of degree
(4) along pipeline theory axis direction, by each section mass centerIt projects on datum plane, calculates each
The minimum envelop radius of circle value of mass center subpoint, as pipeline axial bending the second calculating parameter of degree r_{m}；
(5) the round heart O of minimum envelop of each mass center subpoint is calculated_{2}(x_{e},y_{e}), with the mass center in theoretical sectionWith the round heart O of the minimum envelop_{2}(x_{e},y_{e}) distance value, as pipeline axial bending degree third calculate
Parameter h,
(6) pass through the coordinates measurements of each measuring point on the outer profile in each sectionThe Fitting Calculation obtains each section inspection
Survey side equationWherein k is section side serial number；Each side in section is projected on datum plane again, in benchmark
The maximum value of the corresponding projection side angle in each section is the first calculating parameter of pipeline axial torsion degree in plane
Wherein, m and n be section serial number, m=1,2,3 ..., n=1,2,3 ...；
(7) pass through the coordinates measurements of each measuring point on the outer profile in each sectionEach section detection top is calculated
Point coordinateWherein l is section vertex serial number；Vertex is detected into each sectionDatum plane is projected to,
Each section corresponding vertex is on datum plane with theoretical mass center line institute at maximum central angle
Section corresponding vertex is on datum plane with theoretical mass center line institute at minimum central angle
The maximum central angleWith the minimum central angleDifference is calculated as pipeline axial torsion degree second
Parameter ω_{l},
2. a kind of prismshaped pipeline axial direction bending distortion measurement calculation method according to claim 1, it is characterised in that:
Detect apex coordinate in section described in step (7)For the intersection point on section side, by section side equationIt is calculated.
3. a kind of prismshaped pipeline axial direction bending distortion measurement calculation method according to claim 1, it is characterised in that:
The datum plane is the specified plane perpendicular to theoretical axis.
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN201710609129.6A CN107560559B (en)  20170724  20170724  A kind of prismshaped pipeline axial direction bending distortion measurement calculation method 
Applications Claiming Priority (1)
Application Number  Priority Date  Filing Date  Title 

CN201710609129.6A CN107560559B (en)  20170724  20170724  A kind of prismshaped pipeline axial direction bending distortion measurement calculation method 
Publications (2)
Publication Number  Publication Date 

CN107560559A CN107560559A (en)  20180109 
CN107560559B true CN107560559B (en)  20190524 
Family
ID=60973728
Family Applications (1)
Application Number  Title  Priority Date  Filing Date 

CN201710609129.6A Active CN107560559B (en)  20170724  20170724  A kind of prismshaped pipeline axial direction bending distortion measurement calculation method 
Country Status (1)
Country  Link 

CN (1)  CN107560559B (en) 
Citations (7)
Publication number  Priority date  Publication date  Assignee  Title 

JPH08285572A (en) *  19950414  19961101  Nippon Steel Corp  Method for evaluating shape of sheet 
JP2000002527A (en) *  19980617  20000107  Daiwa Seiko Inc  Measuring means of displaying index of deflection characteristics of pipeshaped body and pipeshaped body with measuring means thereof as index, and measuring device measuring deflection characteristics 
WO2009042997A2 (en) *  20070928  20090402  Lam Research Corporation  Wafer bow metrology arrangements and methods thereof 
CN101536016A (en) *  20060918  20090916  华盛顿大学  Focal plane tracking for optical microtomography 
CN103018024A (en) *  20121203  20130403  奇瑞汽车股份有限公司  Method for evaluating torsional rigidity 
CN204495559U (en) *  20150407  20150722  中国直升机设计研究所  A kind of resilient bearing torsional rigidity proving installation 
CN106840022A (en) *  20160725  20170613  中国科学院长春光学精密机械与物理研究所  A kind of complexcurved face shape error evaluation method 

2017
 20170724 CN CN201710609129.6A patent/CN107560559B/en active Active
Patent Citations (7)
Publication number  Priority date  Publication date  Assignee  Title 

JPH08285572A (en) *  19950414  19961101  Nippon Steel Corp  Method for evaluating shape of sheet 
JP2000002527A (en) *  19980617  20000107  Daiwa Seiko Inc  Measuring means of displaying index of deflection characteristics of pipeshaped body and pipeshaped body with measuring means thereof as index, and measuring device measuring deflection characteristics 
CN101536016A (en) *  20060918  20090916  华盛顿大学  Focal plane tracking for optical microtomography 
WO2009042997A2 (en) *  20070928  20090402  Lam Research Corporation  Wafer bow metrology arrangements and methods thereof 
CN103018024A (en) *  20121203  20130403  奇瑞汽车股份有限公司  Method for evaluating torsional rigidity 
CN204495559U (en) *  20150407  20150722  中国直升机设计研究所  A kind of resilient bearing torsional rigidity proving installation 
CN106840022A (en) *  20160725  20170613  中国科学院长春光学精密机械与物理研究所  A kind of complexcurved face shape error evaluation method 
NonPatent Citations (3)
Title 

Assessment of the integrity of pipes containing circumferential defects using the method of real elements;Markotchev, VM et al;《INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING》;19991130;第76卷(第1415期);第935943页 
管道弯曲塑性屈曲应变的评价;郑茂盛等;《焊管》;20151031;第38卷(第10期);第1927、31页 
高速卧式加工中心床身结构模态优化设计研究;周军等;《机械制造》;20110331;第49卷(第559期);第3741页 
Also Published As
Publication number  Publication date 

CN107560559A (en)  20180109 
Similar Documents
Publication  Publication Date  Title 

CN107607080B (en)  A kind of prismshaped crosssection of pipeline distortion measurement calculation method  
CN103954245A (en)  Precision calibration plate for articulated coordinate measuring machine  
CN104458124A (en)  Barycenter measuring method  
CN103542820B (en)  A kind of method detecting windtunnel inside surface flatness  
CN106568365B (en)  A kind of detection of sphere hole system complex position degree error and assessment method  
CN101196394A (en)  Optimized least square appraisement method for roundness of minor segment circular arc  
CN104050372A (en)  Method for automatically evaluating errors of threedimensional geometrical shapes  
CN106217455A (en)  A kind of method determining diamond wedge cutter mechanical scratching setting angle parameter  
CN107560559B (en)  A kind of prismshaped pipeline axial direction bending distortion measurement calculation method  
Lukasiewicz et al.  Calculation of strains in dents based on high resolution inline caliper survey  
CN107449368B (en)  A kind of buried pipeline deformation pattern detection method  
CN103292769A (en)  Plane inclination error evaluation method based on minimum zone  
CN104056881B (en)  Sheet metal bending apparatus  
CN108332784B (en)  Distance measurement verification method  
CN106323587B (en)  The monocular video highprecision measuring method of wing model in wind tunnel flexible deformation  
CN105627935A (en)  Product material thickness threedimensional analysis system and method  
CN103310106B (en)  The computing method of a kind of hole in piece part system acts  
CN103175487B (en)  Total powerstation expands application process  
CN206459587U (en)  A kind of survey tool  
CN104391272A (en)  Method and system for target positioning by using direction finding data  
CN202255220U (en)  Snap gauge for pipe end of steel pipe  
CN108637037A (en)  A kind of method of steel cold straightener verification straightening roll levelness  
CN103292655B (en)  A kind of computing method of the cylindrical acts having benchmark to retrain  
CN106321148A (en)  Method for analyzing expansion and deformation of shield tunnel connector  
CN108020176A (en)  A kind of biplane angle measurement method and its application 
Legal Events
Date  Code  Title  Description 

PB01  Publication  
PB01  Publication  
SE01  Entry into force of request for substantive examination  
SE01  Entry into force of request for substantive examination  
GR01  Patent grant  
GR01  Patent grant 