CN107505197A - A kind of microfilament stretching device and microfilament drawing process based on binocular vision - Google Patents
A kind of microfilament stretching device and microfilament drawing process based on binocular vision Download PDFInfo
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- CN107505197A CN107505197A CN201710685696.XA CN201710685696A CN107505197A CN 107505197 A CN107505197 A CN 107505197A CN 201710685696 A CN201710685696 A CN 201710685696A CN 107505197 A CN107505197 A CN 107505197A
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- microfilament
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
A kind of microfilament stretching device and microfilament drawing process based on binocular vision, the device are made up of microfilament tensioning system, binocular vision image capturing system, signal transacting control system；Wherein, microfilament tensioning system carries out uniaxial tension to microfilament sample, and obtains real-time value of thrust；Microfilament sample when binocular vision image capturing system is to clamping carries out IMAQ, and carries out IMAQ to drawing process each moment；The clamping offset of microfilament sample when control obtains clamping to collection image with processing system by image procossing, sample position is adjusted by XY fine adjustment stages in microfilament tensioning system, and sample elongation is calculated by the IMAQ in drawing process.The device can not only realize the stretch function of microfilament, moreover it is possible to realize the deviation-correcting function of clamping process, be an important breakthrough to those skilled in the art.
Description
Technical field
The present invention relates to a kind of microfilament stretching device and microfilament drawing process based on binocular vision.
Background technology
Microfilament material is widely used to the fields such as weaving, composite, biologic medical and microelectronics Packaging.Single microfilament
Diameter be generally different from block materials in micron order, its preparation technology mostly, therefore, its mechanical property also has with block materials
Very big difference.Simultaneously as its microsize, clamping error will also result in resultant error during stretched fixation.Therefore, how
The tensile mechanical properties of accurate measurement microfilament, are increasingly valued by people, and detection means is also continued to develop.
In recent years, many technical staff and group are explored and studied to microfilament stretching device, but these are filled
Put and be only capable of the stretch function for realizing microfilament, it is impossible to realize the deviation-correcting function of clamping process.
The content of the invention
The invention provides a kind of microfilament stretching device and microfilament drawing process based on binocular vision, background is which overcomed
Deficiency present in technology.
One of the technical solution adopted for the present invention to solve the technical problems is：
A kind of microfilament stretching device based on binocular vision, including microfilament tensioning system, the microfilament tensioning system include
For clamping upper fixture, the lower clamp of sample, it is characterised in that also including binocular vision image capturing system, signal transacting control
System processed；
The binocular vision image capturing system includes four cameras, for gathering the image information of sample in real time；Wherein
Two camera optical axis are directed at stretching device upper fixture, carry out IMAQ more than 1/2 length to upper fixture and sample top, in addition
Two cameras are directed at stretching device lower clamp, and IMAQ is carried out more than 1/2 length to lower clamp and sample bottom；Described four
The Sample Image information that camera collects, which exists, to partly overlap；
The signal transacting control system includes signal acquisition module, processor, motion-control module：
Wherein signal acquisition module is used to receive four camera acquired image information, and sends processor processing to；
Processor be used for receive through signal acquisition module gather data, and calculate sample vector L and sample preceding
Elongation S in image twice afterwards；
Motion-control module is used for the data for receiving reception processing device, and microfilament is stretched according to vector L, elongation S and is
System carries out motion control.
Among one preferred embodiment, the microfilament tensioning system also includes bottom plate, automatically controlled XY fine adjustment stages, micro- power sensing
Device, Z-direction sports platform, Z-direction motion guide rail, automatically controlled XY fine adjustment stages are located on bottom plate, and Micro-force sensor is finely tuned installed in automatically controlled XY
On platform, lower clamp is arranged on Micro-force sensor, and upper fixture is arranged on Z-direction sports platform, and Z-direction sports platform is transported installed in Z-direction
On dynamic guide rail.
Among one preferred embodiment, the automatically controlled XY fine adjustment stages signal input part of the microfilament tensioning system and motion control
Module by signal output end is connected, and Z-direction motion guide rail signal input part is connected with motion-control module signal output part, micro- power sensing
Device signal output part is connected with signal acquisition module input, binocular vision image capturing system output end and processor input
Connection.
The two of the technical solution adopted for the present invention to solve the technical problems are：
A kind of microfilament drawing process based on any of the above-described microfilament stretching device, it is characterised in that comprise the following steps：
(a) by specimen clamping to upper fixture and lower clamp, low-speed tensile sample, until Micro-force sensor registration becomes
Change, rectangular coordinate system in space is established by Z axis of sample axis；
(b) IMAQ is carried out to sample by binocular vision image capturing system, tried according to acquired image
The edge contour of sample；
(c) by edge contour, the vector L of sample is fitted by processor；
(d) offset correction in the Z-axis direction of lower clamp is calculated according to the vector L of sample, according to resulting
Offset correction is modified by automatically controlled XY fine adjustment stages with adjusting position of the lower clamp in X/Y plane；
(e) after the completion of correcting, low-speed tensile sample, until sensor registration changes, by value of thrust T and elongation S
Reset, as stretching original state；
(f) apply the displacement of Z-direction to sample, sample is stretched；
(g) in drawing process, upper fixture is carried out continuously by binocular vision image capturing system with Fixed Time Interval
IMAQ, according to front and rear acquired image twice, the real-time displacement amount of upper fixture is obtained by feature recognition algorithms；
(h) the value of thrust T in drawing process is gathered in real time, and obtaining stress with pulling force according to the real-time displacement amount gathered should
Varied curve.
It is 0.3um/s to the draw speed of sample in step (a), (e) among one preferred embodiment.
Among one preferred embodiment, the edge contour in step (b) obtains according to canny algorithms.
It is 1um/s to the draw speed of sample in step (f) among one preferred embodiment.
Among one preferred embodiment, step (g) Fixed Time Interval is 1s.
Among one preferred embodiment, the pulling force in step (h) is acquired by Micro-force sensor.
From the above-mentioned description of this invention, compared with prior art, the present invention has the advantages that：
1st, microfilament tensioning system carries out uniaxial tension to microfilament sample, and obtains real-time value of thrust；Binocular vision image is adopted
Microfilament sample when collecting system is to clamping carries out IMAQ, and carries out IMAQ to drawing process each moment；Control and place
The clamping offset of microfilament sample when reason system obtains clamping to collection image by image procossing, by microfilament tensioning system
XY fine adjustment stages adjust sample position, and calculate sample elongation by the IMAQ in drawing process.The device is not only
The stretch function of microfilament can be realized, moreover it is possible to realize the deviation-correcting function of clamping process, be one to those skilled in the art
Important breakthrough.And gather the image information of sample in real time by four cameras of binocular vision image capturing system so that device
Infrastructure cost is low and easy realization, be adapted to popularize in an all-round way and use.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the microfilament stretching device based on binocular vision.
Mark and corresponding parts title in accompanying drawing：
1- bottom plates, the automatically controlled XY fine adjustment stages of 2-, 3- Micro-force sensors, 4- lower clamps, 5- samples, 6- upper fixtures, 7-Z is to fortune
Dynamic platform, 8-Z is to motion guide rail, 9- cameras
Embodiment
Below by way of embodiment, the invention will be further described.
Reference picture 1, a kind of microfilament stretching device based on binocular vision, including microfilament tensioning system, binocular vision image
Acquisition system, signal transacting control system.
The microfilament tensioning system includes being used for upper fixture 6, the lower clamp 4 for clamping sample 5.
In the present embodiment, the microfilament tensioning system also includes bottom plate 1, automatically controlled XY fine adjustment stages 2, Micro-force sensor 3, Z
To sports platform 7, Z-direction motion guide rail 8, automatically controlled XY fine adjustment stages 2 are located on bottom plate 1, and Micro-force sensor 3 is finely tuned installed in automatically controlled XY
On platform 2, lower clamp 4 is arranged on Micro-force sensor 3, and upper fixture 6 is arranged on Z-direction sports platform 7, and Z-direction sports platform 7 is arranged on
On Z-direction motion guide rail 8.
The binocular vision image capturing system includes four cameras 9, for gathering the image information of sample in real time；Wherein
Two optical axis of camera 9 alignment stretching device upper fixtures 6, IMAQ is carried out to upper fixture 6 and the top of sample 5 more than 1/2 length,
Two other camera 9 alignment stretching device lower clamp 4, IMAQ is carried out to lower clamp 4 and the bottom of sample 5 more than 1/2 length；
The Sample Image information that four cameras 9 collect, which exists, to partly overlap；
The signal transacting control system includes signal acquisition module, processor, motion-control module：
Wherein signal acquisition module is used to receive four acquired image information of camera 9, and sends processor processing to；
Processor be used for receive through signal acquisition module gather data, and calculate sample vector L and sample preceding
Elongation S in image twice afterwards；
Motion-control module is used for the data for receiving reception processing device, and microfilament is stretched according to vector L, elongation S and is
System carries out motion control.
The automatically controlled signal input part of XY fine adjustment stages 2 of the microfilament tensioning system connects with motion-control module signal output part
Connect, the signal input part of Z-direction motion guide rail 8 is connected with motion-control module signal output part, the signal output part of Micro-force sensor 3 with
Signal acquisition module input is connected, and binocular vision image capturing system output end is connected with processor input.
The device can not only realize the stretch function of microfilament, moreover it is possible to the deviation-correcting function of clamping process be realized, for this area
It is an important breakthrough for technical staff.And sample is gathered in real time by four cameras of binocular vision image capturing system
Image information so that the infrastructure cost of device is low and easy realization, is adapted to popularize in an all-round way and uses.
A kind of microfilament drawing process based on microfilament stretching device, comprises the following steps：
(a) by the clamping of sample 5 to upper fixture 6 and lower clamp 4, low-speed tensile sample 5, until the registration of Micro-force sensor 3
Change, rectangular coordinate system in space is established by Z axis of sample axis；In the present embodiment, the step (a), in drawing to sample 5
It is 0.3um/s to stretch speed.
(b) IMAQ is carried out to sample by binocular vision image capturing system, tried according to acquired image
The edge contour of sample 5；In the present embodiment, the edge contour in the step (b) obtains according to canny algorithms.
(c) by edge contour, the vector L of sample 5 is fitted by processor；
(d) offset correction in the Z-axis direction of lower clamp 4 is calculated according to the vector L of sample 5, according to resulting
Offset correction be modified by automatically controlled XY fine adjustment stages 2 with adjusting position of the lower clamp 4 in X/Y plane；
(e) after the completion of correcting, low-speed tensile sample 5, until the registration of sensor 3 changes, by value of thrust T and elongation
S is reset, as stretching original state；It is 0.3um/s to the draw speed of sample in the step (e) in the present embodiment.
(f) apply the displacement of Z-direction to sample 5, sample 5 is stretched；It is right in the step (f) in the present embodiment
The draw speed of sample 5 is 1um/s.
(g) in drawing process, upper fixture 6 is carried out continuously by binocular vision image capturing system with Fixed Time Interval
IMAQ, according to front and rear acquired image twice, the real-time displacement amount of upper fixture 6 is obtained by feature recognition algorithms；This reality
Apply in example, the step (g) Fixed Time Interval is 1s.
(h) the value of thrust T in drawing process is gathered in real time, and obtaining stress with pulling force according to the real-time displacement amount gathered should
Varied curve.In the present embodiment, the pulling force in the step (h) is acquired by Micro-force sensor 3.
Embodiment 1：
(a) by the clamping of sample 5 to upper fixture 6 and lower clamp 4, stretched and tried with speed 0.3um/s driving Z-directions sports platform 7
Sample 5, until the registration of sensor 3 changes, the original state as offset detection state；
(b) IMAQ is carried out to sample 5 by binocular vision image capturing system, sample 5 entered by Canny algorithms
Row edge contour detects, then obtains the vector L of sample by least square method；
(c) offset correction in the Z-axis direction of lower clamp 4 is calculated according to the vector L of sample 5, according to resulting
Offset correction, be modified by automatically controlled XY fine adjustment stages 2 with adjusting position of the lower clamp 4 in X/Y plane；
(d) with speed 0.3um/s driving Z-direction sports platforms tensile sample 5, until the registration of sensor 3 changes, by pulling force
Indicating value T and elongation S is reset, the original state as extended state；
(e) with speed 1um/s drivings Z-direction sports platform tensile sample 5, in drawing process, binocular vision figure is passed through every 1s
As acquisition system is carried out continuously IMAQ to upper fixture 6, according to front and rear acquired image twice, obtained by feature recognition algorithms
To the real-time displacement amount of upper fixture 6；
(f) the pulling force T in drawing process is gathered in real time, and ess-strain is obtained according to the real-time displacement amount and pulling force that are gathered
Curve.
The embodiment of the present invention is above are only, but the design concept of the present invention is not limited thereto, it is all to utilize this
Conceive the change that unsubstantiality is carried out to the present invention, the behavior for invading the scope of the present invention all should be belonged to.
Claims (9)
1. a kind of microfilament stretching device based on binocular vision, including microfilament tensioning system, the microfilament tensioning system includes using
In the upper fixture, the lower clamp that clamp sample, it is characterised in that also controlled including binocular vision image capturing system, signal transacting
System；
The binocular vision image capturing system includes four cameras, for gathering the image information of sample in real time；Two of which
Camera optical axis is directed at stretching device upper fixture, and IMAQ is carried out more than 1/2 length to upper fixture and sample top, two other
Camera is directed at stretching device lower clamp, and IMAQ is carried out more than 1/2 length to lower clamp and sample bottom；Four cameras
The Sample Image information collected, which exists, to partly overlap；
The signal transacting control system includes signal acquisition module, processor, motion-control module：
Wherein signal acquisition module is used to receive four camera acquired image information, and sends processor processing to；
Processor be used for receive through signal acquisition module gather data, and calculate sample vector L and sample front and rear two
Elongation S in secondary image；
Motion-control module is used for the data for receiving reception processing device, and microfilament tensioning system is entered according to vector L, elongation S
Row motion control.
A kind of 2. microfilament stretching device based on binocular vision as claimed in claim 1, it is characterised in that：The microfilament stretching
System also includes bottom plate, automatically controlled XY fine adjustment stages, Micro-force sensor, Z-direction sports platform, Z-direction motion guide rail, automatically controlled XY fine adjustment stages
On bottom plate, Micro-force sensor is arranged in automatically controlled XY fine adjustment stages, and lower clamp is arranged on Micro-force sensor, upper fixture peace
On Z-direction sports platform, Z-direction sports platform is arranged on Z-direction motion guide rail.
A kind of 3. microfilament stretching device based on binocular vision as claimed in claim 2, it is characterised in that：The microfilament stretching
The automatically controlled XY fine adjustment stages signal input part of system is connected with motion-control module signal output part, and Z-direction motion guide rail signal is defeated
Enter end to be connected with motion-control module signal output part, Micro-force sensor signal output part connects with signal acquisition module input
Connect, binocular vision image capturing system output end is connected with processor input.
4. the microfilament drawing process based on any one of claims 1 to 3 microfilament stretching device, it is characterised in that including following
Step：
(a) by specimen clamping to upper fixture and lower clamp, low-speed tensile sample, until Micro-force sensor registration changes,
Rectangular coordinate system in space is established by Z axis of sample axis；
(b) IMAQ is carried out to sample by binocular vision image capturing system, sample is obtained according to acquired image
Edge contour；
(c) by edge contour, the vector L of sample is fitted by processor；
(d) offset correction in the Z-axis direction of lower clamp is calculated according to the vector L of sample, according to resulting skew
Correction is modified by automatically controlled XY fine adjustment stages with adjusting position of the lower clamp in X/Y plane；
(e) after the completion of correcting, low-speed tensile sample, until sensor registration changes, value of thrust T and elongation S is reset,
As stretching original state；
(f) apply the displacement of Z-direction to sample, sample is stretched；
(g) in drawing process, image is carried out continuously to upper fixture by binocular vision image capturing system with Fixed Time Interval
Collection, according to front and rear acquired image twice, the real-time displacement amount of upper fixture is obtained by feature recognition algorithms；
(h) the value of thrust T in drawing process is gathered in real time, and ess-strain song is obtained according to the real-time displacement amount gathered and pulling force
Line.
5. microfilament drawing process as claimed in claim 4, it is characterised in that：To the draw speed of sample in step (a), (e)
For 0.3um/s.
6. microfilament drawing process as claimed in claim 4, it is characterised in that：Edge contour in step (b) is calculated according to canny
Method obtains.
7. microfilament drawing process as claimed in claim 4, it is characterised in that：It is to the draw speed of sample in step (f)
1um/s。
8. microfilament drawing process as claimed in claim 6, it is characterised in that：Step (g) Fixed Time Interval is 1s.
9. microfilament drawing process as claimed in claim 4, it is characterised in that：Pulling force in step (h) passes through Micro-force sensor
It is acquired.
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| CN109870354A (en) * | 2019-01-21 | 2019-06-11 | 吉林大学 | Round metal bars sample is uniaxially stretched elongation after fracture method for automatic measurement |
| CN114115126A (en) * | 2021-11-26 | 2022-03-01 | 苏州航宇九天动力技术有限公司 | In-situ stretching table control system and method |
| CN114383938A (en) * | 2020-10-20 | 2022-04-22 | 衡阳功整钢纤维有限公司 | Steel fiber tensile property testing device |
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Application publication date: 20171222 |