CN106767557A - Material long aligns operation cathetus degree on-line measuring device and method - Google Patents
Material long aligns operation cathetus degree on-line measuring device and method Download PDFInfo
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- CN106767557A CN106767557A CN201611250105.8A CN201611250105A CN106767557A CN 106767557 A CN106767557 A CN 106767557A CN 201611250105 A CN201611250105 A CN 201611250105A CN 106767557 A CN106767557 A CN 106767557A
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- 239000000463 material Substances 0.000 title claims abstract description 85
- 241001212149 Cathetus Species 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 93
- 238000004891 communication Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 241000124892 Barbus Species 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000205 computational method Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000012797 qualification Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 description 4
- 238000005272 metallurgy Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001095 motoneuron effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- Length Measuring Devices By Optical Means (AREA)
Abstract
A kind of material aligning operation cathetus degree on-line measuring device and method long, belong to metallurgical industry detection technique field.Device includes laser measurement sensor, sensor stand, sensor data cable, data converter, serial port data line, straight line degree measurement computer, Control line, relay-operated controller, alarm lamp pilot, alarm lamp independent switch, audible-visual alarm lamp, 220V supply lines.Method is：Attachment means are simultaneously adjusted, and start Survey Software, set software parameters, start automatic measurement, and measurement apparatus are closed after being measured.For on-line checking rod product diameter long, ovality and linearity, advantage is that certainty of measurement is high, and easy to use, cost is reasonable.
Description
Technical field
The invention belongs to industrial detection technical field, a kind of material aligning operation cathetus degree on-line checking long is specifically provided
Device and method.
Background technology
Material (the high-speed tool steel pole material of such as 10~95mm of diameter, 3~6m of length and the above) long is a class extensive use
In the material of the industries such as machine-building, architectural engineering, kitchen tools processing, its linearity is important quality parameter, and it is long with every meter
Material profile long is weighed relative to the maximum deviation size of ideal line profile on degree, such as 1~3mm/m (general to require),
0.5mm/m (high requirement).During material long is produced, in order to ensure that its linearity meets the requirements, aligning is typically used
Machine is aligned to material long.
Typical material aligning operation long is made up of below step：1st step, will wait that aligning material long is placed on feeding by overhead traveling crane
On stand；2nd step, drives straightener to be carried out continuously following operation：1) each branch material long is transported to aligning by feed mechanism successively
In the approach table of machine；2) along its length be transported in straightener material long with certain speed by roller-way；3) material long is while receive
Straightener is aligned, while being exported by runout table or slideway, output speed 6~13m/min or higher；4) cutting agency will be long
Material is transported on blanking rack；3rd step, sorting office is transported to by overhead traveling crane by the material long on blanking rack, by artificial or
Automatic equipment carries out linearity inspection：If unqualified, return it into straightener and align again；Otherwise, into next step operation.
Existing aligning operation is can be seen that from top-operation process to have the following disadvantages：(1) off-line measurement have impact on life
The continuity of product, reduces production efficiency；(2) due to can not in time reflect quality problems to a upper operation, percent defective is caused to increase
It is high.
Therefore, in the urgent need to a kind of technology that online straight line degree measurement is carried out in straightener near exit.
The 5.1 of GB/T 11336-2004 give the various methods of straight line degree measurement, including indicator method, light method of principal axes etc.
Method.
Researcher has carried out 7 kinds of online straight line degree measurement systems for industry spot on this basis.First 4 kinds see
Below in document：Korea Spro Zhao Xi, Ma Qiang, Xu Chi, the analysis of the online Linearity surveying systems of the super of thunder uses the metering of contrast [A] China
Metallurgy branch of metering association of association metallurgy branch China 2014 can and energy measurement and green metallurgical forum collection of thesis [C] in
Metallurgy branch of metering association of state:,2014:5, mechanical dial gauge/amesdial straight line degree measurement system is which described (based on instruction
Device method), the linear detection of straight lines degree measuring system of laser (be based on light method of principal axes), Linear displacement transducer detection of straight lines degree measuring system
(being based on indicator method), laser vision detection of straight lines degree measuring system (being based on indicator method).3 kinds of systems are band image procossings afterwards
The linear detection of straight lines degree measuring system of laser (Yu Li Nas be based on image procossing gun barrel straight line degree measurement system design [D]
University Of Science and Technology of the Inner Mongol, 2014), scanning probe straight line degree measurement system (survey by the linearity that the tender of Yang Jiao are based on Multi probe scanning method
Amount technique study [D] Shanghai Communications Universitys, 2013), and Machine Vision Detection straight line degree measurement system (Li little Tao, Du Xiaoqing,
The small loud, high-pitched sound of Lee, machine vision measuring system design [J] optical technologies of the strong steel pipe linearitys in field, 2011,03:317-321), this 3
Plant all based on indicator method.
In above-mentioned 7 kinds typical linearity on-line measurement systems, mechanical dial gauge/amesdial detection, laser linearity test,
Linear displacement transducer detection, the laser linearity test with image procossing, scanning probe detect this 5 kinds of straight line degree measurement systems all
In the presence of and material long contact part, because of the material linearity on-line measurement long after the unsuitable straightener of reason such as abrasion.
Laser vision detects that this straight line degree measurement system belongs to non-contact method, wherein each camera measurement laser irradiation
The two dimensional image of the workpiece profile line formed on workpiece.The precision of existing laser vision detection of straight lines degree measuring system is 1mm/
(Zhao Xihan, Ma Qiang, Xu Chi, the analysis of the online Linearity surveying systems of the super of thunder are metallurgical using metering association of contrast [A] China for m
Metallurgy branch 2014 of metering association of branch China can and energy measurement and metering association of green metallurgical forum collection of thesis [C] China
Can metallurgical branch:,2014:5), this for straight line degree measurement scope be 0.5mm/m or following, and 1~3mm/m material long without
Method is competent at.
This straight line degree measurement system of Machine Vision Detection falls within non-contact method, and wherein each camera measures one section
The two dimensional image of length, thus need addition rotating mechanism make measurand around its longitudinal axis rotate, so just be capable of achieving to whole
The measurement of individual profile.But this by roller-way after straightener for being driven the material long of quick rectilinear movement, it is difficult to is realized.
The content of the invention
It is an object of the invention to provide a kind of material aligning operation cathetus degree on-line measuring device and method long, simply have
Effect, easy to use, cost are reasonable.
Device of the present invention includes sensor stand 4, profile point position measurement sensor array 5, sensor array
Data wire 6, data converter 7, data communication line 8, straight line degree measurement computer 9, Control line 10, relay-operated controller
11st, alarm lamp pilot 12, alarm lamp independent switch 13, audible-visual alarm lamp 14,220V supply lines 15.
Roller-way 1 is connected by bearing with disk roller 2 with bolt；Material long 3 and disk roller 2 are contacted, and disk roller 2 is determined under motor effect
To rotation, drawn by the friction of disk roller 2, material long 3 is moved relative to roller-way 1 on the surface of disk roller 2 towards fixed-direction；Laser Measuring
Quantity sensor 5 is fixed by screws on sensor stand 4；Sensor stand 4 is bolted on roller-way 1；Linearity
Metering computer 9 is stably placed on operating desk 16；Data converter 7, relay-operated controller 11, audible-visual alarm lamp 14 pass through spiral shell
Nail is fixed on operating desk 16；Laser measurement sensor array 5 is connected with data converter 7 by sensor array data line 6；
Data converter 7 is connected with straight line degree measurement computer 9 by data communication line 8；Straight line degree measurement computer 9 and relay control
Device processed 11 is connected by Control line 10；Relay-operated controller 11 and alarm lamp power switch pass through alarm lamp pilot
12 are connected；Alarm lamp power switch 13 is connected with audible-visual alarm lamp 14 by wire；220V supply lines 15 from 220V civil powers
It is divided into two parallel branches, is connected with straight line degree measurement computer 9 all the way, another road is connected with audible-visual alarm lamp 12.
Online test method of the invention comprises the following steps：
1. the measurement range and precision of the parameter of material 3 clearly long, including linearity, the section shape and size of material long 3 are long
The parameters such as the material speed of service.
2. apolegamy profile measurement sensor array 5 is arranged on sensor stand 4, then sensor stand 4 is arranged on into strong
Appropriate location after straight machine, it is specific as follows：
Ensure that sensor stand 4 is arranged on away from straightener delivery outlet certain distance D, the both sides of sensor stand 4 are all useful
In the roller-way or slideway that transmit material 3 long；
Profile point position sensor array 5 on sensor stand 4 is by the individual profile point position measurements of N × (2 × M)
Sensor group is into M is not less than 3 not less than 1, N here.The principle of profile point position measurement sensor is as shown in Figure 1.Each profile
Point position measurement sensor can measure 2 positions of profile point.The diversing lens of each sensor are centrally located at length for L, diameter
For on the face of cylinder of K, and by latticed evenly distributed.From in terms of the radial direction on the face of cylinder, the diversing lens of all the sensors
Central point connects into N number of circle parallel to each other, has 2*M point on each circle；From in terms of the longitudinal axis of the face of cylinder, all the sensors
Laser emission starting point connect into 2*M bar cylinder buses, have N number of point on every bus；The laser output optical axis of each sensor
The direction of material long is all transmitted perpendicular to disk roller, and is intersected with the longitudinal axis on the face of cylinder；
Ensure that material long and profile point position measurement sensor array 5 are not contacted.
Ensure to make the surface of material long 3 there is no the materials such as coolant to cover by purging.Mirror cloth wiping wheel is used before ensuring to measure
The optical window of wide position measurement sensor, makes it clean.
3. power-up starts measurement apparatus, at the interface of the software of straight line degree measurement computer 9, sets measurement parameter, presses
" starting measurement " button starts the measurement of a collection of material long 3.
4. start straightener to align each material long 3, material long 3 runs from straightener outlet along roller-way successively, by this
The profile point position measurement sensor array 5 of invention device.Straight line degree measurement computer 9 presses setting time gap periods ground simultaneously
All profile point coordinates of the interval material long 3 of measurement given length.
5. straight line degree measurement computer 9 calculates the linearity of material long 3 automatically.Computational methods are：For each length of interval
Qi (i=1,2...n), these profile points formation 2*M bar buses Mij (j=1,2 ... 2*M).For every bus Mij, by it
On first point and tail point draw a straight line, calculate other deviations relative to this straight line, if point above this straight line, be
Positively biased difference；It is negative bias difference if point is below this straight line.If maximum positively biased difference is pij, minimal negative deviation is nij, such as
Shown in Fig. 3, then the linearity S of the busij=pij-nij.The linearity of material long
6. linearity show, data storage and alarm.It is automatic with numerical value and song on the interface of straight line degree measurement computer 9
Line shows that current material long 3 is giving quantity and the conjunction of interval linearity, the linearity of a upper material long 3, and machined material long 3
Lattice rate, and by these data, the initial data measured together with sensor and storage are in straight line degree measurement computer 9.If
It was found that the linearity of material long 3 is unqualified, carry out sound and light alarm, and inform locate where it is unqualified.
7. after being measured, measurement apparatus are closed.
Brief description of the drawings
Fig. 1 is apparatus of the present invention structure chart.Wherein：Roller-way 1, disk roller 2, material long 3, sensor stand 4, profile point position are surveyed
Quantity sensor array 5, sensor array data line 6, data converter 7, data communication line 8, straight line degree measurement computer 9, after
Electrical equipment control line 10, relay-operated controller 11, alarm lamp pilot 12, alarm lamp power switch 13, audible-visual alarm lamp 14,
220V supply lines 15, operating desk 16.
Fig. 2 is profile point position measurement sensor measuring principle figure.It is made up of transmitter and receiver.In transmitter
After the laser rays that laser sends is expanded by rotation octahedral mirror, form directional light by diversing lens and be irradiated to material long 3
On.Due to the effect of blocking of 3 pairs of light of material long, light is by forming part shade after receiving lens, so that the shape on photoelectric cell
Into shadow image, the lower edges of shadow image correspond respectively to the Ui of profile point up and down and Vi of material long 3.Carried out by image
Analysis, using the corresponding relation between image pixel and the size of material long 3, it may be determined that go out the accurate location of Ui and Vi.Wherein O is
The midpoint of diversing lens and the receiving lens line of centres.OY is defined as being pointed to by diversing lens center the number at receiving lens center
Axle.OZ was number axis of the O perpendicular to OY and in laser emitting surface, and OX is that the number axis outside paper is pointed to perpendicular to YOZ planes.U and V
Position be coordinate zu and zv on Z.
Fig. 3 is the schematic diagram calculation of the linearity that bus is given on any one given length interval.
Implementation result figure of Fig. 4 present invention for similar round material long.
Specific embodiment：
Device of the present invention includes sensor stand 4, profile point position measurement sensor array 5, sensor array
Data wire 6, data converter 7, data communication line 8, straight line degree measurement computer 9, Control line 10, relay-operated controller
11st, alarm lamp pilot 12, alarm lamp independent switch 13, audible-visual alarm lamp 14,220V supply lines 15.
Roller-way 1 is connected by bearing with disk roller 2 with bolt；Material long 3 and disk roller 2 are contacted, and disk roller 2 is determined under motor effect
To rotation, drawn by the friction of disk roller 2, material long 3 is moved relative to roller-way 1 on the surface of disk roller 2 towards fixed-direction；Laser Measuring
Quantity sensor 5 is fixed by screws on sensor stand 4；Sensor stand 4 is bolted on roller-way 1；Linearity
Metering computer 9 is stably placed on operating desk 16；Data converter 7, relay-operated controller 11, audible-visual alarm lamp 14 pass through spiral shell
Nail is fixed on operating desk 16；Laser measurement sensor array 5 is connected with data converter 7 by sensor array data line 6；
Data converter 7 is connected with straight line degree measurement computer 9 by data communication line 8；Straight line degree measurement computer 9 and relay control
Device processed 11 is connected by Control line 10；Relay-operated controller 11 and alarm lamp power switch pass through alarm lamp pilot
12 are connected；Alarm lamp power switch 13 is connected with audible-visual alarm lamp 14 by wire；220V supply lines 15 from 220V civil powers
It is divided into two parallel branches, is connected with straight line degree measurement computer 9 all the way, another road is connected with audible-visual alarm lamp 12.
Below specific implementation method of the invention is illustrated by taking a kind of oval bar as an example.
1. determine it is a collection of need by aligning and on-line measurement linearity material long, it is desirable to straight line degree measurement scope be 0~
2mm, precision is ± 0.05mm.Material section long for circle, diameter in 60mm, a length of 4m.Straightener is two-roll straightening machine, material long from
Straightener export out after along roller-way with 9m/s speed.
2. 2m positions install device of the invention after aligning, and profile point position measurement sensor selects laser diameter measuring instrument
ODAC 151 (1~150mm of measurement range, precision ± 10um, measurement interval 5ms), quantity is 12 (N=3, M=4), in 1m
It is evenly arranged on the face of cylinder of length；From in terms of the radial direction on the face of cylinder, every 4 sensors carry out a disc, altogether formed 3 this
The disc of sample, the distance of two neighboring disc is 1m；A diameter of 500mm on the face of cylinder.Adjusting apparatus, make the longitudinal axis on the face of cylinder
It is parallel with roller-way traffic direction, and material long 3 on disk roller when running, the axis of material long 3 and the longitudinal axis on the face of cylinder it is maximum away from
From no more than 5mm.When passing through profile point position sensor array 5 which ensures that material long, and it is not contacted.
Ensure to make the surface of material long 3 there is no the materials such as coolant to cover by purging.Mirror cloth wiping wheel is used before ensuring to measure
The optical window of wide position measurement sensor, makes it clean.
3. power-up starts measurement apparatus, at the interface of the software of straight line degree measurement computer 9, sets measurement parameter, presses
" starting measurement " button starts the measurement of a collection of material long 3.
4. start straightener to align each material long 3, material long 3 runs from straightener outlet along roller-way successively, by this
The profile point position measurement sensor array 5 of invention device.Straight line degree measurement computer 9 is spaced (5ms) cycle by setting time
Ground measures all profile point coordinates of the interval material long of given length simultaneously.
5. straight line degree measurement computer 9 calculates the linearity of material long automatically, 5 the step of see by the method for the invention.
6. linearity show, data storage and alarm.The step of by the method for the invention 6, is carried out.
7. after being measured, measurement apparatus are closed.
The effect that the present invention is implemented is as shown in Figure 4.
Claims (2)
1. material long aligns operation cathetus degree on-line measuring device, it is characterised in that including sensor stand (4), profile point position
Measurement sensor array (5), sensor array data line (6), data converter (7), data communication line (8), linearity is put to survey
Amount computer (9), Control line (10), relay-operated controller (11), alarm lamp pilot (12), alarm lamp are independently opened
Close (13), audible-visual alarm lamp (14), 220V supply lines (15)；
Roller-way (1) is connected by bearing with disk roller (2) with bolt；Material (3) long and disk roller (2) are contacted, and profile point position measurement is passed
Sensor array (5) is fixed by screws on sensor stand (4)；Sensor stand (4) is bolted on roller-way (1)
On；
Roller-way (1) is connected by bearing with disk roller (2) with bolt；Material (3) long and disk roller (2) are contacted, and disk roller (2) is acted in motor
Under do directional rotating；Drawn by the friction of disk roller (2), material (3) long is on disk roller (2) surface relative to roller-way (1) towards fixation
Move in direction；Profile point position measurement sensor array (5) is fixed by screws on sensor stand (4)；Sensor stand
(4) it is bolted on roller-way (1)；Straight line degree measurement computer (9) is stably placed on operating desk (16)；Data conversion
Device (7), relay-operated controller (11), audible-visual alarm lamp (14) are fixed by screws on operating desk (16)；Profile point position is surveyed
Quantity sensor array (5) is connected with data converter (7) by sensor array data line (6)；Data converter (7) and straight line
Degree metering computer (9) is connected by data communication line (8)；Straight line degree measurement computer (9) and relay-operated controller (11) are logical
Control line (10) is crossed to be connected；Relay-operated controller (11) and alarm lamp power switch pass through alarm lamp pilot (12)
It is connected；Alarm lamp power switch (13) is connected with audible-visual alarm lamp (14) by wire；220V supply lines from 220V civil powers
(15) it is divided into two parallel branches, is connected with straight line degree measurement computer (9) all the way, another road and audible-visual alarm lamp (12) phase
Even.
2. a kind of online test method of use claim 1 described device, it is characterised in that comprise the following steps：
(1) measurement range and precision of the parameter of material (3) clearly long, including linearity, the section shape and size of material (3) long,
The material speed of service long；
(2) apolegamy profile measurement sensor array (5) is arranged on sensor stand (4), then by sensor stand (4)
Appropriate location after straightener, it is specific as follows：
Sensor stand (4) is ensured installed in away from straightener delivery outlet certain distance D, and the both sides of sensor stand (4) are all useful
In the roller-way or slideway that transmit material (3) long；
Profile point position sensor array (5) on sensor stand (4) is by the individual profile point position measurements of N × (2 × M)
Sensor group is into M is not less than 3 not less than 1, N here；Each profile point position measurement sensor can measure 2 positions of profile point
Put；The diversing lens of each sensor are centrally located at length for L, on the face of cylinder of a diameter of K, and by latticed evenly distributed；
From in terms of the radial direction on the face of cylinder, the diversing lens central point of all the sensors connects into N number of circle parallel to each other, on each circle
There is 2*M point；From in terms of the longitudinal axis of the face of cylinder, the Laser emission starting point of all the sensors connects into 2*M bar cylinder buses,
There is N number of point on every bus；The laser output optical axis of each sensor all transmit the direction of material long, and and the face of cylinder perpendicular to disk roller
Longitudinal axis intersect；
Ensure that material long (3) and profile point position measurement sensor array (5) are not contacted.
Ensure to make material long (3) surface there is no the materials such as coolant to cover by purging；Before ensuring to measure profile is wiped using mirror cloth
The optical window of position measurement sensor array (5), makes it clean.
(3) power-up starts measurement apparatus, at the interface of the software of straight line degree measurement computer (9), sets measurement parameter, presses
" starting measurement " button starts the measurement of a collection of material long (3)；
(4) start straightener to align each material (3) long, material (3) long is run from straightener outlet along roller-way successively, by this
Profile point position measurement sensor array (5) of invention device；Straight line degree measurement computer (9) is by setting time gap periods ground
All profile point coordinates of the interval material (3) long of given length are measured simultaneously；
(5) straight line degree measurement computer (9) calculates the linearity of material long automatically；Computational methods are：For each length of interval Qi
(i=1,2...n), these profile points formation 2*M bar buses Mij (j=1,2 ... 2*M)；For every bus Mij, will thereon
First point and tail point draw a straight line, calculate other deviations relative to this straight line, when point above this straight line, be just
Deviation；It is negative bias difference when point is below this straight line；If maximum positively biased difference is pij, minimal negative deviation is nij, then should
The linearity S of busij=pij-nij；The linearity of material long
(6) it is automatic on the interface of straight line degree measurement computer (9) to show current material (3) long in given interval with numerical value and curve
Linearity, the linearity of a upper material (3) long, and machined material long (3) quantity and qualification rate, and by these data, even
The initial data measured with sensor and storage are in straight line degree measurement computer (9)；When the linearity for finding material (3) long not
When qualified, carry out sound and light alarm, and inform locate where it is unqualified.
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Cited By (8)
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| CN109186478A (en) * | 2018-08-27 | 2019-01-11 | 安徽天裕电力器材有限公司 | A kind of regeneration concrete electric pole vertical height online test method |
| CN109677921A (en) * | 2019-01-28 | 2019-04-26 | 广东金弘达自动化科技股份有限公司 | A kind of long round bar splicing, feeder |
| CN109974631A (en) * | 2019-04-26 | 2019-07-05 | 太原科技大学 | A kind of bar Linearity surveying system and detection method |
| WO2021189734A1 (en) * | 2020-03-26 | 2021-09-30 | 宝山钢铁股份有限公司 | Method and device for measuring straightness of pipe end of steel pipe |
| CN114608487A (en) * | 2022-04-12 | 2022-06-10 | 中国重型机械研究院股份公司 | Bar straightness measuring system and measuring method |
| CN115235385A (en) * | 2022-08-03 | 2022-10-25 | 江苏精益智控科技有限公司 | Steel pipe flatness full-length detection device and method |
| CN116147538A (en) * | 2023-03-31 | 2023-05-23 | 山东曦伴机电技术服务有限公司 | Device and method for measuring straightness of gas cylinder based on light-shadow relation |
| CN114608487B (en) * | 2022-04-12 | 2024-05-31 | 中国重型机械研究院股份公司 | Bar straightness measuring system and measuring method |
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