CN109059823A - A kind of detection system measuring line size parameter - Google Patents
A kind of detection system measuring line size parameter Download PDFInfo
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- CN109059823A CN109059823A CN201811094493.4A CN201811094493A CN109059823A CN 109059823 A CN109059823 A CN 109059823A CN 201811094493 A CN201811094493 A CN 201811094493A CN 109059823 A CN109059823 A CN 109059823A
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- outer diameter
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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
Abstract
A kind of detection system measuring line size parameter, it include: detection device, detection platform and computer, detection device is at least 1, and it is installed on detection platform, the collected data of detection device are transmitted to computer, computer obtains line size parameter by analytical calculation, and shows result.The beneficial effects of the present invention are: 1, detection system of the present invention simplifies artificial detection process, reduce detection operation intensity, reduces human error, improve detection accuracy and efficiency;2, detection range of the present invention is wide, can examine straight tube, S type bend pipe, U-shaped bend pipe, Y-type three way type pipeline;3, detection system of the present invention uses automatic detection, greatly improves detection efficiency;4, the technical parameter of the detected pipeline of detection system of the present invention is more, contains all Pipe installing associated technical parameters.
Description
Technical field
The present invention relates to a kind of detection system, especially a kind of detection system for measuring line size parameter.
Background technique
Pipeline is widely used in mechanical equipment and pipe-line system, when pipeline is for the neck such as oil transportation, gas transmission, infusion, defeated sample
In the pipeline engineering of domain, site operation requires the size that Tube formation is related to very strict.Therefore inside and outside pipeline wall thickness, pipeline
Circularity, the angle of pipeline end face and central axis, the spacing in the pipeline front and back installation end end face center of circle inside and outside roughness, pipeline
From and installation end axis between the technical parameters such as angle seem particularly significant, so must examine whether pipeline installation dimension meets
It is required that.
Line size is examined in measurement at present, and artificial detection method can be used: utilizing vernier caliper, ellipsograph, roughness concentration
The simple detection instrument such as instrument measures line size.This method relatively takes time and effort, and is not suitable for high-volume pipeline
Detection, while detection accuracy not can guarantee.In addition the method that three-dimensional imaging can also be used in detection pipeline sweeps pipeline
Imaging is retouched, although can detecte pipeline outer dimension, still needs artificially to find the benchmark progress later period in 3-D image
Analysis, inefficiency;It and can not scanning imagery for the inside of small-bore pipeline installation end, it is desired nonetheless to by artificial
Detection, not can guarantee and detect under same benchmark, measurement error is big.
Summary of the invention
The shortcomings that in order to overcome existing detection device, present invention offer detection range is wide, detection efficiency is high, detection accuracy is quasi-
Measurement line size parameter detection system.
The technical solution adopted by the present invention to solve the technical problems is a kind of detection system for measuring line size parameter, packet
Include: detection device, detection platform and computer, detection device is at least 1, and is installed on detection platform, detection dress
It sets collected data and is transmitted to computer, computer obtains line size parameter by analytical calculation, and shows result;
Detection device is made of detection module and three axle modules, and three axle modules are rolled by X-axis ball screw, Y-axis ball screw, Z axis
Ballscrew assembles, for adjusting detection module along the movement of X-axis, Y-axis, Z axis;
Detection module is by outer diameter detection probe, inner diameter measurement probe, annular retractable set, cylinder telescopic rod, horizontal rotary mechanism, perpendicular
Direct rotary rotation mechanism, axial-rotation mechanism and fixed mechanism composition;Fixed mechanism is fixedly connected with Z axis ball screw, is rotated horizontally
Rotated in the horizontal direction after mechanism and fixed mechanism are hinged, vertical rotating mechanism and horizontal rotary mechanism it is hinged after in vertical direction
Rotation, axial-rotation mechanism and vertical rotating mechanism hingedly carry out axial-rotation afterwards;Annular retractable set for ring-type, and with axial rotation
Rotation mechanism is fixedly connected, and cylinder telescopic rod is located at the center of annular retractable set and is fixedly connected with axial-rotation mechanism;Annular is stretched
The end of contracting set is fixedly connected with outer diameter detection probe, outer diameter detection probe at least two and be even number, and circumferencial direction pair
Claim distribution;Cylinder telescopic rod end is fixedly connected with inner diameter measurement probe;Outer diameter detection probe and inner diameter measurement probe be located at
On one sagittal plane, outer diameter detection probe and inner diameter measurement probe use high-precision laser range-finding sensor, and realization is adjusted the distance
Detection;
Outer diameter detection probe and synchronous with horizontal rotary mechanism, vertical rotating mechanism, axial-rotation mechanism turn of inner diameter measurement probe
It is dynamic, and follow the X-axis ball screw, Y-axis ball screw, Z axis ball screw synchronizing moving of three axle modules;
Annular retractable set and cylinder telescopic rod axial stretching drive outer diameter detection probe and inner diameter measurement probe axial displacement;
Detection platform be equipped with position reference point O(0,0,0), detection device is in using the coordinate system of the position reference point as zero point
Positional relationship is established, the central point of detection module is the center A of vertical rotating mechanism, and the coordinate of the center A of detection module is
(Lx, Ly, Lz).
The beneficial effects of the present invention are:
1, detection system of the present invention simplifies artificial detection process, reduces detection operation intensity, reduces human error, improves
Detection accuracy and efficiency.
2, detection range of the present invention is wide, can examine straight tube, S type bend pipe, U-shaped bend pipe, Y-type three way type pipeline.
3, detection system of the present invention uses automatic detection, greatly improves detection efficiency.
4, the technical parameter of the detected pipeline of detection system of the present invention is more, contains all Pipe installing the relevant technologies ginsengs
Number.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment;
The structure chart of detection device 111 in Fig. 2 book Fig. 1;
Fig. 3 is the structure chart of detection module 100 in Fig. 2;
Fig. 4 is the cross-sectional view of the A-A of Fig. 3;
Fig. 5 is each freedom degree kinematic parameter schematic diagram of detection device 111 in Fig. 1;
Fig. 6 is conduit axis schematic diagram in the three-dimensional system of coordinate of computer simulation.
In figure: 001. tested pipeline;002. detection end face;003. pipeline end face;111. detection device;222. detections are flat
Platform;333. computer;100. detection module;200. 3 axle modules;201. X-axis ball screw;202. Y-axis ball screw;
203. Z axis ball screws;101. outer diameter detection probe;102. inner diameter measurement is popped one's head in;103. annular retractable set;104. circle
Column telescopic rod;105. axial-rotation mechanism;106. vertical rotating mechanism;107. horizontal rotary mechanism;108. fixed mechanism.
Specific embodiment
As shown in Figure 1, a kind of detection system for measuring line size parameter, comprising: detection device 111, detection platform 222
And computer 333, detection device 111 are at least 1, are 2 in the embodiment of Fig. 1, are separately positioned on tested pipeline 001
Both ends, detection device 111 are installed on detection platform 222, and the collected data of detection device 111 are transmitted to computer 333,
Computer 333 obtains line size parameter by analytical calculation, and shows result;
As shown in Fig. 2, detection device 111 is made of detection module 100 and three axle modules 200, three axle modules 200 are by X-axis ball
Screw rod 201, Y-axis ball screw 202, Z axis ball screw 203 assemble, for adjust detection module 100 along X-axis, Y-axis,
The movement of Z axis;
As shown in Figure 3,4, detection module covers 103, cylinder by outer diameter detection probe 101, inner diameter measurement probe 102, annular retractable
Telescopic rod 104, horizontal rotary mechanism 107, vertical rotating mechanism 106, axial-rotation mechanism 105 and fixed mechanism 108 form;Gu
Determine mechanism 108 to be fixedly connected with Z axis ball screw 203, in level side after horizontal rotary mechanism 107 and fixed mechanism 108 are hinged
To rotation, rotated in vertical direction after vertical rotating mechanism 106 and horizontal rotary mechanism 107 are hinged, axial-rotation mechanism 105 with
Axial-rotation is carried out after vertical rotating mechanism 106 is hinged;Annular retractable set 103 is ring-type, and fixed with axial-rotation mechanism 105
Connection, cylinder telescopic rod 104 are located at the center of annular retractable set 103 and are fixedly connected with axial-rotation mechanism 105;Annular retractable
The end of set 103 is fixedly connected with outer diameter detection probe 101, outer diameter detection probe 101 at least two and be even number, and circumference
Direction is symmetrical;104 end of cylinder telescopic rod is fixedly connected with inner diameter measurement probe 102;Outer diameter detection probe 101 and internal diameter inspection
Probing head 102 is located at on a sagittal plane, and outer diameter detection probe 101 and inner diameter measurement probe 102 are swashed using high-precision
Ligh-ranging sensor realizes the detection adjusted the distance;
Outer diameter detection probe 101 and inner diameter measurement probe 102 and horizontal rotary mechanism 107, vertical rotating mechanism 106, axial rotation
Rotation mechanism 105 rotates synchronously, and follows the X-axis ball screw 201, Y-axis ball screw 202, Z axis ball wire of three axle modules 200
203 synchronizing moving of bar;
Annular retractable set 103 and 104 axial stretching of cylinder telescopic rod drive outer diameter detection probe and inner diameter measurement probe axial
Displacement;
As shown in Figure 1, detection platform 222 be equipped with position reference point O(0,0,0), detection device 111 is with the position reference point
To establish positional relationship in the coordinate system of zero point, as shown in figure 5, the central point of detection module 100 is vertical rotating mechanism 106
The coordinate of center A, the center A of detection module 100 are (Lx, Ly, Lz).
Detecting step is as follows:
Tested pipeline 001 is fixed in detection platform 222 by the first step, and there are two Pipe installing ends for tested pipeline 001, is being examined
It surveys the installation end position on platform 222 close to tested pipeline 001 and a set of detection device 111 is respectively installed, detection device 111 includes
Detection module 100 and three axle modules 200, two detection modules 100 are all using 222 datum mark O of detection platform as the seat of zero point
Positional relationship is established in mark system.
Pipeline wall thickness, pipeline circularity, pipe are arranged according to the technical parameter of tested pipeline 001 in computer 333 for second step
The installation end end face center of circle before and after roughness, pipeline inside and outside the angle of road installation end end face and central axis, Pipe installing end
Between the parameters such as angle and corresponding acceptable deviation between distance and installation end axis.
Third step, according to each freedom degree of position coarse adjustment detection device 111 of the pipeline end face 003 of tested pipeline 001
Movement makes the detection end face 002 of detection module 100 be directed at the pipeline end face 003 of tested pipeline 001.
Coordinate (Lx, Ly, Lz) of the 100 module centers point A of Inventory Detection Module relative to 222 datum mark of detection platform;Together
When computer 333 Inventory Detection Module 100 relative datum coordinate position O horizontal deflection angle δ, vertical deflection angle θ, conversion obtains
Telescopic moving distance L of the detection sectional plane center of circle A1 of detection module 100 apart from 100 module centers point of detection module;Detect mould
Coordinate position (X, Y, Z)=(Lx+ of 100 detection sectional plane center of circle A1 of block、Ly+, Lz+),
Simultaneously can convert the unit vector [m1, m2, m3] obtained 100 axis direction of detection module in three-dimensional system of coordinate=[] 。
4th step, Reference detection positions positioning: detection module 100 carries out axial-rotation detection around tested pipeline 001, together
When slowly protrude into tested pipeline 001 expand detection range, when all probes of detection module 100 can collect data, calculate
Data (A1, A2, A3 ... .An) of the collected outer diameter detection probe 101 of 333 Inventory Detection Module of machine 100 apart from pipeline outer wall,
Data (B1, B2, B3 ... .Bn) of the inner diameter measurement probe 102 apart from inner wall of the pipe.Computer 333 analyzes two groups of data
It is [m4, m5, m6] that 001 pipeline one end axis unit vector of tested pipeline, which is calculated,.Control axial-rotation in detection module 100
Mechanism 105, vertical rotating mechanism 106, horizontal rotary mechanism 107 move so that 100 axis direction unit vector of detection module with
001 pipeline one end axis unit vector of tested pipeline is consistent, i.e., is also [m4, m5, m6], at this time 100 axis of detection module
It is overlapped with two axis of 001 pipeline one end of tested pipeline.Outer diameter detection probe 101 in detection module 100 at this time is calculated simultaneously
100 benchmark of detection module can be completed with the coordinate position (X1, Y1, Z1) of the detection sectional plane center of circle A1 of inner diameter measurement probe 102
Detect position positioning, that is, detection module 100 detection sectional plane center of circle A1 coordinate position (X1, Y1, Z1), detection module
100 axis direction unit vectors are [m4, m5, m6].
5th step, the calculating of 001 outer diameter of tested pipeline and internal diameter: after the completion of Reference detection positions positioning, detection module 100
001 pipe end of tested pipeline is retracted, detection module 100 is rotationally advancing acquisition number according to the direction of unit vector [m4, m5, m6]
According to.The outer diameter detection probe 101 of detection module 100 acquires data as (a1, a2, a3 ... .an), 102 acquisition of inner diameter measurement probe
Data are b1, b2, b3 ... .bn), outer diameter detection probe 101 is a, inner diameter measurement probe 102 apart from detection sectional plane center of circle A1 distance
It is b apart from detection sectional plane center of circle A1 distance;Outer diameter detection probe 101, which is subtracted, using data a acquires data (a1, a2, a3 ...
.an), 001 outer diameter parameters of tested pipeline (Q1, Q2, Q3 ... Qn) is obtained;Number is acquired plus outer diameter detection probe 102 using data b
According to (b1, b2, b3 ... .bn), 001 internal diameter parameter of tested pipeline (P1, P2, P3 ... Pn) is obtained.
6th step, 001 wall thickness of tested pipeline calculate: since 100 outer diameter detection probe 101 of detection module and inner diameter measurement are popped one's head in
102 on a sagittal plane, thus according to 001 outer diameter parameters of tested pipeline (Q1, Q2, Q3 ... .Qn), internal diameter (P1,
P2, P3 ... .Pn), two groups of data subtract each other to obtain 001 wall thickness data of tested pipeline (D1, D2, D3 ... Dn), pass through calculated wall thickness number
001 wall thickness D of tested pipeline is then obtained according to arithmetic mean of instantaneous value, that is, is had。
7th step, roughness calculates inside and outside tested pipeline 001: according to 001 outer diameter of tested pipeline (Q1, Q2, Q3 ... .Qn),
Two groups of data of internal diameter (P1, P2, P3 ... .Pn) are calculated 001 outer diameter of tested pipeline (Q1, Q2, Q3 ... .Qn) data and are averaged
The average value P of value Q, 001 internal diameter of measured tube deferent (P1, P2, P3 ... .Pn) data;Calculating 001 outer diameter of tested pipeline (Q1, Q2,
Q3 ... .Qn) difference between data and outer diameter tube average value Q obtains data (Q1, Q2, Q3 ... Qn), calculate quilt
The difference of 001 internal diameter of test tube road (P1, P2, P3 ... .Pn) between data and internal diameter of the pipeline average value P obtain data (P1,
P2, P3 ... Pn);(Q1, Q2, Q3 ... Qn), (P1, P2, P3 ... Pn) two groups of data are sought respectively
The arithmetic mean of instantaneous value of absolute value is 001 inside surface roughness Ra2 of 001 outer surface roughness Ra1 of tested pipeline and tested pipeline,
Have。
8th step, roundness calculation inside and outside tested pipeline 001: according to 001 outer diameter of tested pipeline (Q1, Q2, Q3 ... .Qn), quilt
001 internal diameter of test tube road (P1, P2, P3 ... .Pn), two groups of data;001 outer diameter average value Q of tested pipeline, tested pipeline is calculated
001 internal diameter average value P.Choose 001 outer diameter of tested pipeline (Q1, Q2, Q3 ... .Qn), internal diameter (P1, P2, P3 ... .Pn) data China and foreign countries
Diameter maximum value Qx, minimum outer diameter value Qy, maximum inner diameter Px, minimum diameter Py.001 maximum outside diameter Qx of tested pipeline is subtracted outside minimum
The difference of diameter Qy is the outer circularity O1 of tested pipeline 001 divided by the operation result of 001 outer diameter average value Q of tested pipeline;Measured tube
It is quilt that 001 maximum inner diameter Px of road, which subtracts the difference of minimum diameter Py divided by the operation result of 001 internal diameter average value P of tested pipeline,
Circularity O2, that is, have in test tube road 001、。
9th step, the angle calculation of pipeline end face 003 and 001 central axis of tested pipeline and pipeline end face center of circle A2's
Establish: detection module 100 is rotationally advancing acquisition data according to the direction of the unit vector [m4, m5, m6] of Reference detection positions, when
First outer diameter detection probe 101 enters tested pipeline 001, and when collecting first data, the distance inspection of record current location
Survey the telescopic moving distance L1 of 100 module centers point A of module;When the last one outer diameter detection probe 101 enters tested pipeline
001, and when collecting first data, record telescopic moving distance of the current location apart from 100 module centers point A of detection module
L2;Pipeline end face 003 is to have with 001 axis angulation of tested pipeline, Q is tested pipeline
001 outer diameter average value;Telescopic moving distance L at 003 center of circle A2 of pipeline end face is the distance of telescopic moving twice above-mentioned twice
Average value has。
Tenth step, tested pipeline 001 has left and right two pipeline end faces, the distance in two pipeline end face centers of circle in this implementation
And angle calculation between two pipe end axis: as shown in fig. 6, in order to distinguish the center of circle of left and right two pipeline end faces, will more than
003 center of circle A2 of pipeline end face in step is divided into left side center of circle N, right side center of circle V, in order to distinguish left and right two detection modules
Module centers point module centers point A in above step is divided into left module centers point M, right mould block central point W;
Tested pipeline 001 has two pipeline end faces in left and right, and the detection module 100 of 001 left end of tested pipeline is in Reference detection positions
When, the deflection angle theta 1 of the deflection angle δ 1 of relative horizontal position, relative vertical position, 001 left side centre point N of tested pipeline away from
It is Ln with a distance from detection telescopic moving from 100 module centers point M of detection module, that is, has the coordinate position of left module centers point M
(Lx1, Ly1, Lz1), N point coordinate (Lx1+, Ly1+, Lz1+), MN axis
Direction unit vector is。
The detection module 100 of 001 right end of tested pipeline is in Reference detection positions, the deflection angle of opposite script horizontal position
The deflection angle theta 2 of δ 2, opposite script vertical position, detection of the 001 left side center of circle V of tested pipeline apart from right mould block central point W are stretched
Contracting moving distance is Lv, that is, has coordinate bit (Lx2, Ly2, Lz2), the V point coordinate (Lx2+ of right mould block central point W2, Ly2+, Lz2+), WV axis direction unit vector be。
The coordinate relationship of two groups of vectors, the left and right end face of tested pipeline 001 circle are established after operational data in computer 333
Heart distance LMWThe distance between as M point, W point, if Lx=、Ly
=、Lz=Then
LMW .Show that tested pipeline 001 or so holds the angle between axis using unit vector method
Φ then has。
11st step, computer 333 to roughness Ra 1 outside the pipeline wall thickness D of the tested pipeline 001 being calculated, pipeline,
The outer circularity O1 of roughness Ra 2, pipeline in pipeline, circularity O2, the angle of pipeline end face and central axis, pipeline in pipeline
Front and back installation end end face circle center distance LMWAnd the technical parameters such as installation end axis angle Φ are recorded, and with the conjunction that inputs in advance
Data are compared in lattice parameter, are judged whether in deviation range, if the matching requirements for meeting engineering site are shown simultaneously
Testing result.
Claims (1)
1. a kind of detection system for measuring line size parameter characterized by comprising detection device, detection platform and meter
Calculation machine, the detection device is at least 1, and is installed on detection platform, the collected data transmission of detection device
To computer, the computer obtains line size parameter by analytical calculation, and shows result;
The detection device is made of detection module and three axle modules, and three axle modules are by X-axis ball screw, Y-axis ball screw, Z
Shaft ball screw assembles, for adjusting detection module along the movement of X-axis, Y-axis, Z axis;
Detection module is by outer diameter detection probe, inner diameter measurement probe, annular retractable set, cylinder telescopic rod, horizontal rotary mechanism, perpendicular
Direct rotary rotation mechanism, axial-rotation mechanism and fixed mechanism composition;The fixed mechanism is fixedly connected with Z axis ball screw, described
It is rotated in the horizontal direction after horizontal rotary mechanism and the fixed mechanism are hinged, the vertical rotating mechanism and the horizontal rotation
It is rotated in vertical direction after mechanism is hinged, the axial-rotation mechanism and the vertical rotating mechanism hingedly carry out axial rotation afterwards
Turn;The annular retractable set is ring-type, and is fixedly connected with the axial-rotation mechanism, and the cylinder telescopic rod is located at the ring
The center of shape telescopic is simultaneously fixedly connected with the axial-rotation mechanism;The end of the annular retractable set is fixedly connected with outer diameter inspection
Probing head, the outer diameter detection probe at least two and be even number, and circumferencial direction is symmetrical;The cylinder telescopic rod
End is fixedly connected with inner diameter measurement probe;The outer diameter detection probe and inner diameter measurement probe are located at a sagittal plane
On, the outer diameter detection probe and inner diameter measurement probe use high-precision laser range-finding sensor, realize the detection adjusted the distance;
The outer diameter detection probe and inner diameter measurement probe and the horizontal rotary mechanism, vertical rotating mechanism, axial-rotation machine
Structure rotates synchronously, and follows the X-axis ball screw, Y-axis ball screw, Z axis ball screw synchronizing moving of three axle module;
The annular retractable set and the cylinder telescopic rod axial stretching drive the outer diameter detection probe and inner diameter measurement to visit
Head axial displacement;
The detection platform be equipped with position reference point O(0,0,0), the detection device is using the position reference point as zero point
Positional relationship is established in coordinate system, the central point of the detection module is the center A of the vertical rotating mechanism, detection module
The coordinate of center A is (Lx, Ly, Lz).
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109211169A (en) * | 2018-09-18 | 2019-01-15 | 江苏神通阀门股份有限公司 | A kind of detection system and its detection method measuring line size parameter |
CN109709157A (en) * | 2019-01-24 | 2019-05-03 | 上海乔治费歇尔亚大塑料管件制品有限公司 | Detection device for plastic pipe |
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 |
CN112781480A (en) * | 2021-01-18 | 2021-05-11 | 广州海狮软件科技有限公司 | Pipe diameter and thickness measuring instrument and measuring method thereof |
CN113029011A (en) * | 2021-03-19 | 2021-06-25 | 广州海狮软件科技有限公司 | Calibration method and calibration device for measuring thickness of pipe wall of pipe |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109211169A (en) * | 2018-09-18 | 2019-01-15 | 江苏神通阀门股份有限公司 | A kind of detection system and its detection method measuring line size parameter |
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- 2018-09-19 CN CN201811094493.4A patent/CN109059823A/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109211169A (en) * | 2018-09-18 | 2019-01-15 | 江苏神通阀门股份有限公司 | A kind of detection system and its detection method measuring line size parameter |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109211169A (en) * | 2018-09-18 | 2019-01-15 | 江苏神通阀门股份有限公司 | A kind of detection system and its detection method measuring line size parameter |
WO2020057101A1 (en) * | 2018-09-18 | 2020-03-26 | 江苏神通阀门股份有限公司 | Detection system for measuring pipeline size parameters and detection method therefor |
CN109709157A (en) * | 2019-01-24 | 2019-05-03 | 上海乔治费歇尔亚大塑料管件制品有限公司 | Detection device for plastic pipe |
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 |
CN112781480A (en) * | 2021-01-18 | 2021-05-11 | 广州海狮软件科技有限公司 | Pipe diameter and thickness measuring instrument and measuring method thereof |
CN113029011A (en) * | 2021-03-19 | 2021-06-25 | 广州海狮软件科技有限公司 | Calibration method and calibration device for measuring thickness of pipe wall of pipe |
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