CN106643629A - Tubular structure inner surface roughness measurement calculating method - Google Patents
Tubular structure inner surface roughness measurement calculating method Download PDFInfo
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- CN106643629A CN106643629A CN201710153989.3A CN201710153989A CN106643629A CN 106643629 A CN106643629 A CN 106643629A CN 201710153989 A CN201710153989 A CN 201710153989A CN 106643629 A CN106643629 A CN 106643629A
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- surface roughness
- measurement
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- line
- roughness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces
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- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The present invention provides a tubular structure inner surface roughness measurement calculating method. The method concretely expresses how to use a current measurement tool to perform multiple measurements, and combines final measurement data to calculate and obtain tubular structure inner surface roughness value. The tubular structure inner surface roughness measurement calculating method is simple in principle and clear in thinking, and the economic efficiency of the measurement cost is good.
Description
Technical field
The present invention relates to tubular inner surface roughness concentration problem, and in particular to a kind of tubular structure interior surface roughness is surveyed
Amount computational methods.
Background technology
It is well known that the determination of roughness value is requisite link in engineer applied, more particularly to pipeline transport
Petrochemical industry class industry, for the determination of the inside surface roughness of pipeline is even more extremely paid close attention to., roughness larger for size
The tubular structure that instrument can be stretched into, can adopt surface roughometer mode measured directly, but this mode has significant limitation,
As being difficult to measure at structural bending, the size of particularly tubular structure is smaller, it is impossible to stretches into measurement, or works as what is measured
When physical dimension is long, roughmeter also cannot play a role well.To this processing mode it is using existing in engineering
Data, it is directly theoretical using total roughness value, qualitatively analyze, can not accurately measure the roughness at a certain sectional position
How value, quantitatively determine the rough inner surface angle value of a certain position, is good problem to study.
Xie Yonggang of Harbin University of Science and Technology et al. is proposed for the surface finish measurement with surface deep valley signal
Gaussian filtering method (application number:201610907699.9) it is, theoretical by introducing regression theory and robust iterative, it is used for
The open loop gaussian filtering model of open contours；Determine that the above-mentioned open loop gaussian filtering model for open contours is used sane
Estimate weight function；Using the current open loop gaussian filtering model for open contours for obtaining, to surface deep valley signal
Surface finish measurement data carry out gaussian filtering.
It is brilliant that handsome cyclopentadienyl soldier of Inst. of Materials, Chinese Academy of Engineering Physics et al. proposes a kind of sign ultra precision cutting surface
New method (the application number of boundary's relief:201610859259.0), using bandreject filtering can effectively reduce cutter mark signal interference,
Prominent crystal boundary relief information, and size method can effectively represent the tortuous of surface profile in fractal dimension concept, the present invention
Solve when ultra precision cutting oxygen-free copper surface while when there is machining spur and crystal boundary relief information, traditional roughness concentration
The problem of its difference is cannot be distinguished by, crystal boundary relief feature can be effectively recognized, quantitatively reflects microstoning table under micro-scale
The shape characteristic information in face.
It is thick that Changchun Institute of Optics, Fine Mechanics and Physics, CAS's Zhang Chunlei et al. proposes a kind of optical element
Rugosity on-line detecting system (application number:201610957048.0), its scheme realizes the online roughness to optical element
Detection work, effectively increases working (machining) efficiency.
Although various surface roughness value measurement method set forth above, seldom relates to tubular structure interior surface roughness
The measuring method of value, it is still desirable to for tubular structure interior surface roughness value measuring method is probed into.
The content of the invention
It is an object of the invention to measure and calculate tubular structure interior surface by a kind of metering system of simple possible
Roughness value, there is provided can be used to solve the concrete operation method of engineering problem.
The technical problem to be solved employs the following technical solutions to realize：
1st, a kind of tubular structure interior surface roughness concentration calculates method, it is characterised in that using existing surface roughness
E measurement technology and thickness measurement technique, measure to tubular structure interior surface roughness, and by measurement result rough inner surface is sought
Angle value, comprises the following steps that：
(1) position model is set up
A, along s directions, with the tubular structure outer surface roughness value that surface roughometer measurement distance length is w, by institute
Measure numerical value and be depicted as plane coordinates curve in a computer, the outline line a of outer surface is generated, if along tubular structure extending direction
For X-axis, it is Y direction perpendicular to X-axis and to point to outer surface by inner surface.
B, defined by roughness, when setting up coordinate system, make the arithmetic average of X-axis and the outer surface roughness profile drawn
Center line overlaps, and origin is the intersection point of center line and end face.
C is identical with step A, is also the interior table of w with the surface roughometer measurement distance length with probe along s directions
Face, and measurement position and outer surface measuring aligned in position, while result is also drawn in plane coordinates, obtain the interior table of this section
Surface roughness contour curve b, the X-direction of curve is consistent with described in step A, Y direction and direction phase described in step A
Instead.
D, the thickness that tubular structure is measured with thickness gauge, along s directions, measurement distance length is w, by the numeric renderings of measurement
In the coordinate system that D steps are drawn, thickness distribution line c is obtained.
E, the profile diagram of Two coordinate system is plotted in the same coordinate system, two profile source of graph relative positions are by end
The thickness of tubular structure determines that two outline line starting points are connected with the end points at end and region p is obtained.
F, by corresponding thickness value at each position on outer surface roughness profile line out, connect each point, obtain
Inside surface roughness outline line b1, connects outline line a and b1 two-end-point, obtains region q.
The relative position of G, contrast q and p, calculates two area coincidence degree t, when t does not meet required precision, readjusts survey
Amount position, repeats C, D, E, F, till required precision is met；When precision meets the requirements, then can determine whether obtained by final F
Position model is correct, into next step：
(2) survey calculation：
H, as determined by F correct position model, the thickness of tubular structure outer surface roughness and structure is measured simultaneously,
Surveyed roughness result is drawn in a coordinate system, while at each point on outline line, line segment is made downwards, line segment length is institute
At tubular structure thickness value, finally the end points of all line segments is coupled together, draw inner surface profile line.
I, by H steps gained inner surface profile line, calculate inside surface roughness.
On J, a cross section, rotatable different angles, repeatedly measurement, averages, and draws the coarse of a certain cross-section
Angle value.
2nd, required precision described in step F is specially registration t scopes more than 95%.
The embodiment of the inventive method is elaborated by illustrating accompanying drawing and brief description, the invention will be had more
Deep understanding.
Description of the drawings
Fig. 1 is implementation steps flow chart of the present invention for survey calculation tubular structure interior surface roughness value；
Fig. 2 is roughmeter measurement outer surface roughness schematic diagram；
Fig. 3 is the outer surface roughness outline line drawn out；
Fig. 4 is roughmeter measurement inside surface roughness schematic diagram；
Fig. 5 is the inside surface roughness outline line drawn out；
Fig. 6 is thickness gauge measurement thickness schematic diagram；
Fig. 7 is thickness distribution line；
Fig. 8 is the region of outer surface roughness outline line and inside surface roughness outline line composition；
Fig. 9 is the region of outer surface roughness outline line and relative contour composition.
Label in figure：1. tubular structure；2. roughmeter；3. computer；4. with the roughmeter of probe；5. thickness gauge.
Specific embodiment
In order that the technological means of the present invention, the objects and advantages reached more clearly are expressed, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the present invention.It should be appreciated that specific embodiment described herein is only to explain
The present invention, is not intended to limit the present invention.
Refer to the attached drawing 1, is the operational flowchart of the inventive method.Position model is initially set up, by the measurement of such as accompanying drawing 2
Mode measures outer surface roughness, and roughmeter 2, along the direction represented by s, measures a bit of w on the outer surface of tubular structure 1
Length, the data for measuring are drawn out in computer 3, obtain outer surface roughness outline line a as shown in Figure 3.Its
Secondary, as shown in accompanying drawing 4 the measuring method measurement inside surface roughness of tubular structure 1, the roughmeter 4 with probe is tied in tubulose
Along the direction shown in s on the inner surface of structure 1, it is also the length of w to measure length, while the data of gained are painted in computer 3
Make and, obtain inside surface roughness outline line as shown in Figure 5.Then by metering system measurement pipe as shown in Figure 6
The thickness of shape structure 1, with thickness gauge 5 along s directions, measures thickness of the length for the tubular structure 1 of w, and by the result for measuring
Draw out in computer 3, obtain thickness distribution line c as shown in Figure 7.It should be noted that roughmeter 2 and thickness
In same point, the roughmeter 4 with probe measures starting point with the measurement starting point of roughmeter 2 same to the starting point of the measurement of instrument 5
In radius.
Outer surface roughness outline line a and inside surface roughness outline line b are plotted in the same coordinate system, region is obtained
P, outer surface roughness outline line a is merged with thickness distribution line c, is obtained region q and is calculated inside surface roughness outline line b1,
The registration t of p and q is calculated, if t ＜ 95%, needs to adjust measurement position, re-started and be accurately positioned, measured again, it is such as attached
Shown in Fig. 1 flow charts；When t >=95%, it is believed that the calculating inside surface roughness outline line b1 of gained can be used as actual inner surface
Roughness profile line b, directly calculates rough inner surface angle value by b1.Credibility to improve measurement result, can be by tubulose
Structure 1 rotates to an angle, and takes the other positions in same section, and repeatedly measurement is averaged, and is finally determined at a certain section
Rough inner surface angle value.
It should be understood that refer to above-mentioned embodiment by way of example, and the invention is not restricted to be particularly shown
And content described above.Conversely, the scope of the present invention includes the combination and deformation of above-mentioned various features, and it is familiar with ability
The technical staff in domain in modification that above description is carried out to the present invention and deformation and prior art is seen undocumented modification and
Deformation.
Claims (2)
1. a kind of tubular structure interior surface roughness concentration calculates method, it is characterised in that using existing surface finish measurement
Technology and thickness measurement technique, measure to tubular structure interior surface roughness, and by measurement result rough inner surface angle value is sought,
Comprise the following steps that：
(1) position model is set up
A, along s directions, with the tubular structure outer surface roughness value that surface roughometer measurement distance length is w, will be measured
Numerical value is depicted as in a computer plane coordinates curve, generates the outline line a of outer surface, if being X along tubular structure extending direction
Axle, it is Y direction perpendicular to X-axis and to point to outer surface by inner surface.
B, defined by roughness, when setting up coordinate system, make the arithmetic average center line of X-axis and the outer surface roughness profile drawn
Overlap, origin is the intersection point of center line and end face.
C is identical with step A, is also the inner surface of w with the surface roughometer measurement distance length with probe along s directions,
And measurement position and outer surface measuring aligned in position, while result is also drawn in plane coordinates, obtain the inner surface of this section
Roughness profile curve b, the X-direction of curve is consistent with described in step A, and Y direction is in opposite direction with described in step A.
D, the thickness that tubular structure is measured with thickness gauge, along s directions, measurement distance length is w, by the numeric renderings of measurement in D
In the coordinate system that step is drawn, thickness distribution line c is obtained.
E, the profile diagram of Two coordinate system is plotted in the same coordinate system, two profile source of graph relative positions are by end tubulose
The thickness of structure determines that two outline line starting points are connected with the end points at end and region p is obtained.
F, by corresponding thickness value at each position on outer surface roughness profile line out, connect each point, obtain interior table
Surface roughness outline line b1, connects outline line a and b1 two-end-point, obtains region q.
The relative position of G, contrast q and p, calculates two area coincidence degree t, when t does not meet required precision, readjusts measurement position
Put, repeat C, D, E, F, till required precision is met；When precision meets the requirements, then the position obtained by final F is can determine whether
Model is correct, into next step：
(2) survey calculation：
H, correct position model, the thickness measurement simultaneously to tubular structure outer surface roughness and structure, by institute as determined by F
Survey roughness result to draw in a coordinate system, while at each point on outline line, line segment is made downwards, line segment length is point
The tubular structure thickness value at place, finally couples together the end points of all line segments, draws inner surface profile line.
I, by H steps gained inner surface profile line, calculate inside surface roughness.
On J, same cross section, rotatable different angles, repeatedly measurement, averages, and draws the roughness of a certain cross-section
Value.
2. a kind of tubular structure interior surface roughness concentration according to claim 1 calculates method, it is characterised in that step
Required precision described in F be specially registration t scopes 95% and its more than.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710153989.3A CN106643629A (en) | 2017-03-15 | 2017-03-15 | Tubular structure inner surface roughness measurement calculating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063044A (en) * | 2017-06-29 | 2017-08-18 | 西安欧中材料科技有限公司 | A kind of detection method of plasma rotating electrode powder manufacturing apparatus bar |
| CN108680126A (en) * | 2018-04-27 | 2018-10-19 | 上海集成电路研发中心有限公司 | A kind of device and method of detection pipeline inner wall roughness |
| CN110542400A (en) * | 2019-09-10 | 2019-12-06 | 广东职业技术学院 | long pipe inner wall roughness measuring device based on test metering technology and measuring method thereof |
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| JPH0372211A (en) * | 1989-08-11 | 1991-03-27 | Hitachi Ltd | Analyzing apparatus of shape of inner wall of minute hole |
| KR20100137698A (en) * | 2009-06-23 | 2010-12-31 | 한국과학기술원 | Surface roughness measurement method for mold inside surface |
| CN103615992A (en) * | 2013-11-15 | 2014-03-05 | 南京航空航天大学 | Method and device for detecting roughness of inner surface of micro-pore |
| WO2014122107A1 (en) * | 2013-02-07 | 2014-08-14 | Commissariat à l'énergie atomique et aux énergies alternatives | Device for measuring the surface roughness of a surface |
| CN105444725A (en) * | 2016-01-15 | 2016-03-30 | 晋西车轴股份有限公司 | A hollow shaft deep-small bore surface quality automatic detection apparatus |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0372211A (en) * | 1989-08-11 | 1991-03-27 | Hitachi Ltd | Analyzing apparatus of shape of inner wall of minute hole |
| KR20100137698A (en) * | 2009-06-23 | 2010-12-31 | 한국과학기술원 | Surface roughness measurement method for mold inside surface |
| WO2014122107A1 (en) * | 2013-02-07 | 2014-08-14 | Commissariat à l'énergie atomique et aux énergies alternatives | Device for measuring the surface roughness of a surface |
| CN103615992A (en) * | 2013-11-15 | 2014-03-05 | 南京航空航天大学 | Method and device for detecting roughness of inner surface of micro-pore |
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Non-Patent Citations (1)
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| 徐晓梅: "反射式强度调制型光纤传感孔内表面粗糙度检测技术研究", 《中国博士学位论文全文数据库 工程科技I辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063044A (en) * | 2017-06-29 | 2017-08-18 | 西安欧中材料科技有限公司 | A kind of detection method of plasma rotating electrode powder manufacturing apparatus bar |
| CN108680126A (en) * | 2018-04-27 | 2018-10-19 | 上海集成电路研发中心有限公司 | A kind of device and method of detection pipeline inner wall roughness |
| CN110542400A (en) * | 2019-09-10 | 2019-12-06 | 广东职业技术学院 | long pipe inner wall roughness measuring device based on test metering technology and measuring method thereof |
| CN110542400B (en) * | 2019-09-10 | 2021-03-16 | 广东职业技术学院 | Long pipe inner wall roughness measuring device based on test metering technology and measuring method thereof |
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