CN107084675A - A kind of on-line automatic measurement apparatus of spiral welded pipe caliber and method - Google Patents
A kind of on-line automatic measurement apparatus of spiral welded pipe caliber and method Download PDFInfo
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- CN107084675A CN107084675A CN201710333910.5A CN201710333910A CN107084675A CN 107084675 A CN107084675 A CN 107084675A CN 201710333910 A CN201710333910 A CN 201710333910A CN 107084675 A CN107084675 A CN 107084675A
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- welded pipe
- spiral welded
- laser sensor
- dot laser
- rotary shaft
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
Abstract
The invention discloses a kind of on-line automatic measurement apparatus of spiral welded pipe caliber and method, including：Dot laser sensor (1), sensor installation seat (2), rotary shaft (3), electric slip ring (4), load bearing (5), shaft coupling (6), direct current generator (7), electricity driving displacement platform (8), displacement platform sliding block (9), displacement platform motor (10), cantilever (11).During measurement, dot laser sensor (1) is stretched into spiral welded pipe, drive rotary shaft (3) to rotate by direct current generator (7), drive dot laser sensor (1) continuously to rotate, complete the on-line automatic measurement to spiral welded pipe caliber internal diameter.Pass through the processing to dot laser sensor (1) gathered data, obtain the internal diameter and ovality of spiral welded pipe, that is, by coordinate transformation, the measurement data of dot laser sensor is transformed under rectangular co-ordinate, and equation of a circle is fitted using least-squares algorithm, so as to obtain diameter of a circle, meanwhile, the intersection point of line and circle by asking for data point and the center of circle, and the distance between two intersection points are sought, obtain the ovality of spiral welded pipe.
Description
Technical field
The invention belongs to spiral welded pipe Calibration technical field, it is related to a kind of on-line automatic measurement dress of spiral welded pipe caliber
Put and method.
Background technology
In the production of spiral welded pipe, the caliber of steel pipe needs to be measured in real time, to ensure product quality.At present, commonly use
Metering system be by manually using steel tape, to be measured using Zhou Changfa.Though such a metering system meets standard requirement, one
Aspect, manual measurement is influenceed by survey crew's individual factor, and measurement error is larger；On the other hand, because manual measurement has one
Fixed hysteresis quality, can not be grasped in time to the trend that caliber develops, generally could be by measurement after significant change occurs for caliber
It was found that, cause adjustment delayed, easily cause steel pipe because caliber is exceeded and discarded or degrades, and above all caliber can not be online
Measurement, it is impossible to monitor the quality condition of welded tube in real time.
With the development of pipeline construction, more and more stricter, the traditional measurement side of requirement in actual job to steel pipe caliber
Formula can not gradually meet the requirement of actual control because measuring the reasons such as the frequency is few, human error is big.Therefore, it is badly in need of exploitation a set of
Automatic on-line Calibration system, realizes high-precision stably measured.
The content of the invention
Present invention aims at provide a kind of on-line automatic measurement apparatus of spiral welded pipe caliber.During measurement, dot laser sensing
Device (1) is stretched into spiral welded pipe, by controlling direct current generator (7) to drive rotary shaft (3) to rotate, drives dot laser sensor (1)
Continuous rotation, completes the on-line automatic measurement to spiral welded pipe caliber internal diameter.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of described on-line automatic measurement apparatus of spiral welded pipe caliber, including：Dot laser sensor (1), sensor peace
Dress seat (2), rotary shaft (3), electric slip ring (4), load bearing (5), shaft coupling (6), direct current generator (7), electricity driving displacement platform (8),
Displacement platform sliding block (9), displacement platform motor (10), cantilever (11).Wherein, dot laser sensor (1) is pacified installed in sensor
Fill on seat (2), sensor installation seat (2) is connected with rotary shaft (3), rotary shaft (3) passes through the bearing and connection in load bearing (5)
Axle device (6) is connected, and the other end of shaft coupling (6) is connected with direct current generator (7) output shaft；Load bearing (5) connects with cantilever (11)
Connect, cantilever (11) is connected with displacement platform sliding block (9), displacement platform sliding block (9) is arranged on electricity driving displacement platform (8).
Further, electric slip ring (4) is hollow annular construction, is enclosed in rotary shaft (3), subpart and rotary shaft (3)
Connection, stationary part is connected with load bearing (5).The signal wire and supply lines of dot laser sensor (1) are connected on electric slip ring respectively
(2) on the connection jaws of subpart, output line is connected on the connection jaws of electric slip ring (2) stationary part with externally fed line respectively
On.Signal output and the electric power input of dot laser sensor (1) are transferred by slip ring (2), not made in continuous rotation
Into cable winds.
Further, shaft coupling (6) directly connects the output shaft and rotary shaft (3) of direct current generator (7), realizes direct current
Motor (7) direct drive rotary shaft (3) and the dot laser sensor (1) in rotary shaft (3), it is ensured that actuating unit
Compactedness and lightweight, reduce the load of cantilever (11).
Further, displacement platform sliding block (9) can be moved up and down in the presence of displacement platform motor (10), drive cantilever
(11) miscellaneous part and with (11) being connected is moved up and down, so as to adjust the upper-lower position of dot laser sensor (1) so that
For different size of spiral welded pipe, dot laser sensor (1) can be located substantially at the home position of welded tube all the time.
Preferably, displacement platform sliding block (9) is driven by leading screw, and leading screw is directly driven by displacement platform motor (10).
The object of the invention also resides in a kind of on-line automatic measuring method of spiral welded pipe caliber of offer.Step includes：
(1) control electricity driving displacement platform (8), the upper-lower position of adjustment dot laser sensor (1), and by human eye observation, make manually
Dot laser sensor (1) is located substantially at spiral welded pipe center, to ensure spiral welded pipe to be measured having in dot laser sensor (1)
Imitate in measurement range；
(2) automatic measurement program is opened, direct current generator (7) driving rotary shaft (3) rotation drives dot laser sensor (1) rotation
360 degree；
(3) measurement data of process points laser sensor (1), obtains the diameter and ovality of spiral welded pipe.
Further, the concrete operation step of step (3) the processing measurement data is：
1. the measuring center using dot laser sensor (1) is origin, sets up polar coordinate system, and by the survey of dot laser sensor (1)
Data are measured to (ui,vi,wi) it is expressed as polar form (ρi,θi), whereinθi=i [2 π/(t
F)], f is the measurement frequency of dot laser sensor (1), and t is time of measuring, and i spans are 1 to tf；
2. using polar standard shaft as X-axis, polar origin is origin, plane right-angle coordinate is set up, by data to (ρi,
θi) it is projected in X, in Y-coordinate axle, rectangular co-ordinate data are obtained to (xi,yi), wherein xi=ρi·cosθi,yi=ρi·sinθi；
3. the equation (x-a) of measurement circle is set up2+(y-b)2=c2, by rectangular co-ordinate data to (xi,yi) measurement equation of a circle is substituted into,
Using least square method, optimal parameter a, b, c is obtained, that is, obtains diameter of a circle c and central coordinate of circle (a, b), resulting is straight
Footpath c is the diameter of spiral welded pipe；
4. the ovality γ of spiral welded pipe is calculated, point (x is sought firsti,yi) and the line of the center of circle (a, b) and two round friendships of measurement
The distance between two intersection points are designated as d by pointi, then max (di) it is maximum gauge, min (di) it is minimum diameter, according to ellipse
Circularity is defined, ovality γ=max (di)-min(di)。
Further, the present apparatus can when spiral welded pipe is welded normal work, you can to carry out on-line measurement, at the same by
Without human users in measurement process, therefore automatic measurement can be realized.
The beneficial effects of the present invention are：
Compared to original manual measurement, apparatus and method of the present invention can realize automatic measurement, improve measurement effect
Rate, it is ensured that the accuracy and uniformity of measurement；Meanwhile, apparatus and method of the present invention can not change spiral welded pipe original
On the premise of first production line, on-line measurement is carried out, the diameter change situation of real-time control spiral welded pipe is realized, ensured indirectly
The quality of production.
The measurement data of dot laser sensor is transformed under rectangular co-ordinate by the method for the invention by coordinate transformation,
And equation of a circle is fitted using least-squares algorithm, precision high the characteristics of fast with speed；Propose ovality simultaneously
Computational methods, provide another evaluation criterion for the quality of spiral welded pipe.
Device of the present invention realizes the complete cycle continuous acquisition data of sensor, you can with continuous by using slip ring
Measure the diameter of spiral welded pipe.
Device of the present invention can realize the upper-lower position movement of point displacement transducer by controlling electricity driving displacement platform,
So as to realize internal diameter and the measurement of ovality of the spiral welded pipe of different tube diameters.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings, and the explanation is according to the current preferred reality of massager of the present invention
The description of example is applied, the only form that the present invention may be constructed or use is not represented.
A kind of on-line automatic measurement apparatus of spiral welded pipe caliber and method, Fig. 1 is the structure chart of apparatus of the present invention, main bag
Include：Dot laser sensor (1), sensor installation seat (2), rotary shaft (3), electric slip ring (4), load bearing (5), shaft coupling (6),
Direct current generator (7), electricity driving displacement platform (8), displacement platform sliding block (9), displacement platform motor (10), cantilever (11).
With reference to shown in Fig. 1, dot laser sensor (1) is stretched into spiral welded pipe, and rotary shaft is driven by direct current generator (7)
(3) rotate, drive dot laser sensor (1) continuously to rotate, complete the on-line automatic measurement to spiral welded pipe caliber internal diameter.
With reference to shown in Fig. 1, dot laser sensor (1) be arranged on sensor installation seat (2) on, sensor installation seat (2) with
Rotary shaft (3) is connected, and rotary shaft (3) is connected through the bearing in load bearing (5) with shaft coupling (6), shaft coupling (6) it is another
End is connected with direct current generator (7) output shaft；Electric slip ring (4) be hollow annular construction, be enclosed in rotary shaft (3), subpart with
Rotary shaft (3) is connected, and stationary part is connected with load bearing (5)；Load bearing (5) is connected with cantilever (11), cantilever (11) with
Displacement platform sliding block (9) is connected, and displacement platform sliding block (9) is arranged on electricity driving displacement platform (8).
The signal wire and supply lines of dot laser sensor (1) are transferred by electric slip ring (4), namely dot laser sensor
(1) signal wire and supply lines is connected on the connection jaws of electric slip ring (2) subpart respectively, output line and externally fed line
On the connection jaws for being connected on electric slip ring (2) stationary part respectively.
With reference to shown in Fig. 1, direct current generator (7) output shaft is directly connected by shaft coupling (6) with rotary shaft (3), Ye Jizhi
Flow motor (7) direct drive rotary shaft (3) and the dot laser sensor (1) in rotary shaft (3).Displacement platform sliding block
(9) it can be moved up and down in the presence of displacement platform motor (10), and then the upper-lower position of adjustment dot laser sensor (1),
To adapt to the measurement of different tube diameters.
The step of measuring method of the present invention, includes：
(1) control electricity driving displacement platform (8), the upper-lower position of adjustment dot laser sensor (1), and observed by people manually
Survey, dot laser sensor (1) is located substantially at spiral welded pipe center, to ensure spiral welded pipe to be measured in dot laser sensor
(1) in effective range；
(2) automatic measurement program is opened, direct current generator (7) driving rotary shaft (3) rotation drives dot laser sensor (1) rotation
360 degree；
(3) measurement data of process points laser sensor (1), obtains the diameter and ovality of spiral welded pipe.
Further, the concrete operation step of step (3) the processing measurement data is：
1. the measuring center using dot laser sensor (1) is origin, sets up polar coordinate system, and by the survey of dot laser sensor (1)
Data are measured to (ui,vi,wi) it is expressed as polar form (ρi,θi), whereinθi=i [2 π/(t
F)], f is the measurement frequency of dot laser sensor (1), and t is time of measuring, and i spans are 1 to tf；
2. using polar standard shaft as X-axis, polar origin is origin, plane right-angle coordinate is set up, by data to (ρi,
θi) it is projected in X, in Y-coordinate axle, rectangular co-ordinate data are obtained to (xi,yi), wherein xi=ρi·cosθi,yi=ρi·sinθi；
3. the equation (x-a) of measurement circle is set up2+(y-b)2=c2, by rectangular co-ordinate data to (xi,yi) measurement equation of a circle is substituted into,
Using least square method, optimal parameter a, b, c is obtained, that is, obtains diameter of a circle c and central coordinate of circle (a, b), resulting is straight
Footpath c is the diameter of spiral welded pipe；
4. the ovality γ of spiral welded pipe is calculated, point (x is set up first with two point formi,yi) and the center of circle (a, b) line it is straight
Line equation (x-xi)/(y-yi)=(a-xi)/(b-yi), then ask itself and measurement equation of a circle (x-a)2+(y-b)2=c2Two
Solution, d is designated as by the absolute distance between two solutionsi, then defined according to ovality, ovality γ=max (di)-min(di)。
The invention is not restricted to the details of above-mentioned exemplary embodiment, and in the case of without departing substantially from essential characteristic of the present invention,
The present invention can be realized in other specific forms, all should regard the present invention as exemplary.The scope of the invention is by appended power
Profit requires to limit, it is intended that all changes fallen in the implication and scope of the condition of equivalent of claim are covered in this hair
In bright, any reference in claim should not be considered as to the claim involved by limitation.Meanwhile, above-mentioned specific embodiment party
Only for clarity, the step that specification should be considered as in entirety, above-mentioned implementation by those skilled in the art can be appropriate for formula
Combination changes, but without departing from its general principles and feature, is formed the skilled addressee will appreciate that other embodiment.
Claims (7)
1. a kind of on-line automatic measurement apparatus of spiral welded pipe caliber, including：Dot laser sensor (1), sensor installation seat (2),
Rotary shaft (3), electric slip ring (4), load bearing (5), shaft coupling (6), direct current generator (7), electricity driving displacement platform (8), displacement platform is slided
Block (9), displacement platform motor (10), cantilever (11).During measurement, dot laser sensor (1) is stretched into spiral welded pipe, by straight
Motor (7) driving rotary shaft (3) rotation is flowed, drives dot laser sensor (1) continuously to rotate, is completed to spiral welded pipe caliber internal diameter
On-line automatic measurement.
2. a kind of on-line automatic measurement apparatus of spiral welded pipe caliber according to claim 1, it is characterised in that：Dot laser is passed
Sensor (1) is arranged on sensor installation seat (2), and sensor installation seat (2) is connected with rotary shaft (3), and rotary shaft (3) is passed through and held
Bearing in power bearing (5) is connected with shaft coupling (6), and the other end of shaft coupling (6) is connected with direct current generator (7) output shaft；Electricity
Slip ring (4) is hollow annular construction, is enclosed in rotary shaft (3), subpart is connected with rotary shaft (3), stationary part and load
Bearing (5) is connected；Load bearing (5) is connected with cantilever (11), and cantilever (11) is connected with displacement platform sliding block (9), displacement platform sliding block
(9) it is arranged on electricity driving displacement platform (8).
3. a kind of on-line automatic measurement apparatus of spiral welded pipe caliber according to claim 1, it is characterised in that：Dot laser is passed
The signal wire and supply lines of sensor (1) are transferred by electric slip ring (4), not cause cable winds in continuous rotation.
4. a kind of on-line automatic measurement apparatus of spiral welded pipe caliber according to claim 1, it is characterised in that：Direct current generator
(7) output shaft is connected by shaft coupling (6) with rotary shaft (3), namely direct current generator (7) direct drive rotary shaft (3) and peace
Dot laser sensor (1) in rotary shaft (3).
5. a kind of on-line automatic measurement apparatus of spiral welded pipe caliber according to claim 1, it is characterised in that：Displacement platform is slided
Block (9) can be moved up and down in the presence of displacement platform motor (10), and then adjust the upper bottom of dot laser sensor (1)
Put, to adapt to the measurement of different tube diameters.
6. a kind of on-line automatic measuring method of spiral welded pipe caliber, step includes：
(1) upper-lower position of control electricity driving displacement platform (8) adjustment dot laser sensor (1), by human eye observation, passes dot laser
Sensor (1) is located substantially at spiral welded pipe center；
(2) control direct current generator (7) driving rotary shaft (3) rotation, drives dot laser sensor (1) to be rotated by 360 °；
(3) measurement data of process points laser sensor (1), obtains the diameter and ovality of spiral welded pipe.
7. a kind of on-line automatic measuring method of spiral welded pipe caliber according to claim 6, it is characterised in that：The step
(3) concrete operation step is：
1. by the measurement data of dot laser sensor (1) to (ui,vi,wi) it is expressed as polar form (ρi,θi), whereinθi=i [2 π/(tf)], f are the measurement frequency of dot laser sensor (1), and t is time of measuring, i
Span is 1 to tf；
2. by data to (ρi,θi) be projected on rectangular co-ordinate, rectangular co-ordinate data are obtained to (xi,yi), wherein xi=ρi·cos
θi,yi=ρi·sinθi；
3. the equation (x-a) of measurement circle is set up2+(y-b)2=c2, by rectangular co-ordinate data to (xi,yi) measurement equation of a circle is substituted into,
Using least square method, optimal parameter a, b, c is obtained, that is, obtains diameter of a circle c and central coordinate of circle (a, b), resulting is straight
Footpath c is the diameter of spiral welded pipe；
4. point (x is soughti,yi) and the center of circle (a, b) line with measurement circle two intersection points, the distance between two intersection points are designated as
di, then ovality γ=max (di)-min(di)。
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Application publication date: 20170822 |