CN107367238A - Novel portable strain test system and test method - Google Patents
Novel portable strain test system and test method Download PDFInfo
- Publication number
- CN107367238A CN107367238A CN201610315654.2A CN201610315654A CN107367238A CN 107367238 A CN107367238 A CN 107367238A CN 201610315654 A CN201610315654 A CN 201610315654A CN 107367238 A CN107367238 A CN 107367238A
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- China
- Prior art keywords
- displacement
- strain
- camera
- image
- amplifying mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000010998 test method Methods 0.000 title abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 241000282461 Canis lupus Species 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000007796 conventional method Methods 0.000 claims 1
- SEUDSDUUJXTXSV-UHFFFAOYSA-N dimethyl(oxo)silane Chemical compound C[Si](C)=O SEUDSDUUJXTXSV-UHFFFAOYSA-N 0.000 claims 1
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Polymers C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 claims 1
- 238000000879 optical micrograph Methods 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000010146 3D printing Methods 0.000 description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 description 5
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 5
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 5
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 5
- 241000219739 Lens Species 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- UAJUXJSXCLUTNU-UHFFFAOYSA-N pranlukast Chemical compound C=1C=C(OCCCCC=2C=CC=CC=2)C=CC=1C(=O)NC(C=1)=CC=C(C(C=2)=O)C=1OC=2C=1N=NNN=1 UAJUXJSXCLUTNU-UHFFFAOYSA-N 0.000 description 1
- 229960004583 pranlukast Drugs 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
Classifications
-
- 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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a novel portable strain test system and a test method. The system comprises a strain amplifying mechanism, a movable device, a soft microscope and a picture acquisition, processing, data processing and display method. The strain amplification mechanism is provided with two fixed surfaces for being fixed on a strain test part, and the mobile equipment can be equipment with image processing capability, such as a personal digital camera, a smart phone, a notebook computer, a tablet computer and the like; the microscope is a magnifying glass for enhancing the image resolution function of the mobile equipment; the testing method is that a displacement amplifying mechanism is adopted to convert strain into mechanism output displacement, the mechanism output displacement is amplified, and then strain amplifying images are collected by using image equipment, a magnifier/microscope and the like. Then analyzing the image, determining the output displacement of the amplifying mechanism, obtaining the actual value of the strain through the relation between the output displacement and the strain, and then displaying the test result in a graph and icon mode.
Description
Technical field
The invention discloses a kind of novel portable strain measurement system and method for testing.It is directed to miniature displacement equations
Mechanism, the making and use of miniature magnifying glass, and using image processing come measuring strain method.
Background technology
It is engineering design and analysis to the strain analysis of material or structure under different load conditions, and structural load,
Safety monitoring etc. provides valuable information.The detection of strain is being produced and widely used in engineering construction.Measuring strain is most
Common method is to use resistance strain plate and electronics strain testing instrument, is reflected by the change of the resistance of electronics foil gauge
The value of strain.This electronics deformeter is typically read in response to increased resistance value caused by change using special bridge amplifier.
This professional electronics deformeter price is somewhat expensive, and it is inconvenient to carry.Because power consumption height is, it is necessary to power, scene makes in the wild
With unusual inconvenience.And the needs of pasting of foil gauge particularly cohere glue and paste step, are the use band of engineering staff
Carry out inconvenience.
The content of the invention
The present invention provides a kind of novel portable strain measurement system and method for testing regarding to the issue above.
Novel portable strain measurement system in the present invention：It includes miniature displacement amplifying mechanism, software optical loupes,
For in portable personal platform（Such as digital camera, smart mobile phone, tablet personal computer and notebook computer）IMAQ at
Reason and presentation of information application program etc..Described miniature displacement amplifying mechanism, including two fixing ends are cemented at the table of part to be measured
Be used to displacement on face input, displacement pointer indicate output displacement, a two-stage displacement amplifying mechanism, and a displacement and
Length reference part.Described miniature displacement amplifying mechanism can use 3D printing, injection, the processing method processing such as pressing mold.
Described software optical loupes are the single side magnifying glasses formed using the plastic materials hot working of PDMS or other softwares, can
To be directly attached on the camera lens of the camera of personal portable platform.Affiliated image acquisition and processing and result show that program provides
Image collecting function, image model function of search, picture size calibrating function, digital figure display function.
New strain method of testing of the present invention is：Using one, one or more levels miniature displacement amplifying mechanism will treat geodesic structure
The strain on surface is converted to displacement and is amplified output, the software lens being then process using thermoforming process with
Personal portable（Such as digital camera, smart mobile phone, tablet personal computer and notebook computer）Composition possesses the figure of microscopic function
As capture apparatus, and it is defeated by the output indicator image of application program acquisition displacement amplifying mechanism, analysis displacement amplifying mechanism
Go out the output displacement of indicator, with reference to the displacement-strain stress relation demarcated in advance, corresponding strain value to be measured can be drawn, and
User is shown to by the display screen of personal portable.
It is an advantage of the invention that：It is easy to use, without reading strain using special bridge-type resistance signal amplifier,
Only need to be combined can with the personal portable device generally used, do not limited by many situations such as scene power supplies；Property
For valency than high, the method using the present invention is substantially suitable with the resolution ratio measured by the foil gauge generally used in the market, but
Price but considerably cheaper；The fixation of miniature displacement amplifier in the present invention pastes fixed simple appearance than common foil gauge
It is easy to get more, using common seccotine.Using simply, non-plumber can also grasp system and method in the present invention
Make.
Brief description of the drawings
The method basic function that Fig. 1 is the present invention forms schematic diagram.
Fig. 2 is 4 kinds of miniature displacement amplifying mechanism principle schematics in the present invention.
Fig. 3 is the software lens in the present invention and preparation method thereof schematic diagram and lens specimen.
Fig. 4 is the miniature displacement amplifying mechanism example figure of two using 3D printing in the present invention.
Fig. 5 is that the miniature displacement amplifying mechanism of two using 3D printing in the present invention carries out strain testing result.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, new strain measuring method is fixed on object under test using miniature displacement amplifying mechanism in the present invention
Surface, then using personal images/information platform, such as digital camera, smart mobile phone, tablet personal computer and notebook computer, match somebody with somebody
Conjunction uses image amplification equipment, such as magnifying glass, microscope etc., shoots the displacement output indicator of miniature displacement amplifying mechanism not
With the indicating positions that strain is lower, then by graphical analysis and the input and output displacement to displacement amplifying mechanism in advance demarcation pass
System draws the measured value of strain.
It is 4 kinds of miniature displacement amplifying mechanisms in the present invention, i.e. sensor shown in Fig. 2.It is not both with common sensor,
Strain is converted into mechanical displacement signal output, rather than electric signal output by the sensor in the present invention.Shown in figureFor position
Input fixture is moved,For straight amplifying device,' it is inclined amplifying device,To amplify middleware,It is defeated for displacement
Go out indicator,Fixture is inputted for non-displacement.RemoveOutside, all component thickness are all identical, and both less than described
Thickness.The surface of strain object to be measured is fixed on, miscellaneous part does not all contact with surface to be measured.When surface to be measured produces
Strain, two fixturesBetween will produce input displacement QUOTE , wherein QUOTE For the span between two fixtures.Sensor -1 is one-level enlarger, and input displacement acts onOn so that
Produce a small anglec of rotation QUOTE , QUOTE is enlarged into by output displacement indicator Carry-out bit
Move, wherein QUOTE ForCenter to the end A of displacement indicator distance.Sensor -2, -3, -4 be two level
Displacement amplifying mechanism.Wherein sensor -2 is identical with 3 operation principle, and the layout of structure is different.The first order is amplified for inclined
Device, be made up of two symmetrical rod members, each in symmetry axis vertical line into QUOTE Angle.Input displacement QUOTE It is enlarged into QUOTE Exported at C.Output displacement at C is second level enlarger
（It is similar with the structure of sensor -1）Input displacement, and amplified again and at the end A of displacement output indicator export.
The first order inclined displacement amplifier of sensor -4 is by the displacement input displacement QUOTE of input It is enlarged into QUOTE Exported at C（It is identical with sensor -2 and 3）.Second level amplifier is by the close bar of two spacing
Part is formed；One end of two of which rod member is connected together as the output point A of displacement follower indicator, and in addition one
Individual end is individually fixed at pedestal B（It is connected with fixture）It is connected with first order displacement output point C.The two of two level enlarger
The distance BC of individual rod member is shorter, and its multiplication factor is higher.
Fig. 3 is its preparation method schematic diagram of software lens and lens specimen in the present invention.Pass through the preparation method in invention
The software lens being process can be pasted directly built in the platforms such as smart mobile phone, tablet personal computer, notebook computer, iPAD
On the camera lens of camera so that these cameras have image amplification/microscopic function, can differentiate the tiny position of displacement indicator
Put change.Procedure of processing one shares four steps as shown in the figure：(a) by PDMS（Or the plastic material of other softwares）Base and
Curing agent is according to 10：1 ratio is well mixed in small container；（b）By well mixed PDMS colloids be placed on low pressure or
Remove bubble therein within 30 minutes in vacuum utensil；(c) PDMS is loaded into syringe, is disposed vertically and its end is let slip a remark
From apart 20 millimeters of the surface of the heating plate (hotplate) of lower section；（d）Clean thin glass sheet is placed in heater plate surface, will
The surface of heating plate is heated to the temperature specified, and PDMS is dripped on sheet glass.The surface temperature of heating plate is different, shaping
The curvature of software magnifying glass is just different, and multiplication factor is also corresponding different.
Shown in Fig. 4 is the miniature displacement amplifier formed using ABS material 3D printing（Sensor as shown in Figure 3-
1）.It is the corresponding size of 5 samples in table.Heretofore described sensor（Displacement amplifier）Can by injection molding,
The cheap method processing such as pressing mold shaping, 3D printing.
It is to measure strain case result of the cantilever beam when end loads using method of the present invention shown in Fig. 5.
Using 5 displacement amplifiers, iPhone6 shown in Fig. 4 and 215.6oThe software lens being molded during C are combined and measured
Strain and the output displacement relation of indicator.
Claims (10)
1. a kind of portable strain measurement system, it is characterised in that described test system includes displacement amplifying mechanism, and optics is put
Big mirror, for portable personal platform（Including camera, smart mobile phone, tablet personal computer, notebook computer etc.）IMAQ at
The application program that reason and result are shown.
2. displacement amplifying mechanism according to claim 1, it is characterised in that described displacement amplifying mechanism has two positions
Move input and displacement output indication end；Two displacement inputs can be fixed on the test table of strain testing part with seccotine
Face；The small strain of test surfaces is converted into input displacement through two inputs, and shifter output terminal in place shows after being amplified by mechanism
Show the displacement of amplification.
3. optical loupes according to claim 1, it is characterised in that described magnifying glass uses poly dimethyl oxosilane
（Polydimethylsiloxane, PDMS）The one side convex lens that hot-working forms, can be attached on vision facilities naturally（Such as
Camera, smart mobile phone, tablet personal computer, notebook computer etc.）Before the camera lens of built-in camera so that the camera have it is micro-
The function of mirror.
4. optical loupes according to claim 1, it is characterised in that described magnifying glass can be set with image is placed on
It is standby（Such as camera, smart mobile phone, tablet personal computer, notebook computer）Before the camera lens of built-in camera, so that the photograph equipment
There is microscopical function.
5. the application journey that the image acquisition and processing and result according to claim 1 for portable personal platform is shown
Sequence, it is characterised in that described platform has IMAQ and processing function, has image or digital displaying function.
6. displacement amplifying mechanism according to claim 2, it is characterised in that described displacement amplifying mechanism has built-in
Shift length demarcates symbol.
7. a kind of strain testing method, it is characterised in that described method is amplified using mechanical displacement, optical microphotograph amplification, and figure
As the technologies such as acquisition process and numerical monitor are combined into, without using the special of strain reading/amplification and display in conventional method
Use electronic equipment.
8. strain testing method according to claim 7, it is characterised in that using micromachine mechanism by strain to be measured
The input displacement of mechanism is converted into, and input displacement is amplified by this mechanism and is output in displacement indicate indicator.
9. strain testing method according to claim 7, it is characterised in that using optical amplifier device by displacement equations machine
The displacement of output displacement indicate indicator in structure is further amplified, and enables image capture device to capture displacement equations machine
Structure displacement output indication part and the corresponding displacement of strain.
10. strain testing method according to claim 7, it is characterised in that it passes through personal camera, smart mobile phone, flat
Portable stages such as plate computer, notebook computer etc. obtain the defeated of displacement amplifier come the image for gathering and handling displacement amplifier
Go out the measurement of displacement, so as to obtain the strain with measurement, and strain result will be measured by personal portable platform and be shown to user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610315654.2A CN107367238A (en) | 2016-05-13 | 2016-05-13 | Novel portable strain test system and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610315654.2A CN107367238A (en) | 2016-05-13 | 2016-05-13 | Novel portable strain test system and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107367238A true CN107367238A (en) | 2017-11-21 |
Family
ID=60303612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610315654.2A Pending CN107367238A (en) | 2016-05-13 | 2016-05-13 | Novel portable strain test system and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107367238A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547129A (en) * | 2014-10-13 | 2016-05-04 | 斯凯孚公司 | Method and data processing device for determining a spacing of rolling elements |
| US10788382B2 (en) | 2014-10-13 | 2020-09-29 | Aktiebolaget Skf | Method and data processing device for detecting a load distribution in a roller bearing |
| CN113227705A (en) * | 2018-10-02 | 2021-08-06 | 沙特阿拉伯石油公司 | Optical hand-held strain measurement device enclosed in a housing containing a light source |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520387A (en) * | 2009-03-27 | 2009-09-02 | 清华大学 | Low-dimension material dynamic tensile loading measurement system |
| CN103988109A (en) * | 2011-10-07 | 2014-08-13 | 新加坡国立大学 | Mems-based zoom lens system |
| WO2016018541A1 (en) * | 2014-07-28 | 2016-02-04 | Illinois Tool Works Inc. | Real-time video extensometer |
| CN107041152A (en) * | 2014-06-27 | 2017-08-11 | 伊利诺斯工具制品有限公司 | Optical extensometer |
-
2016
- 2016-05-13 CN CN201610315654.2A patent/CN107367238A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520387A (en) * | 2009-03-27 | 2009-09-02 | 清华大学 | Low-dimension material dynamic tensile loading measurement system |
| CN103988109A (en) * | 2011-10-07 | 2014-08-13 | 新加坡国立大学 | Mems-based zoom lens system |
| CN107041152A (en) * | 2014-06-27 | 2017-08-11 | 伊利诺斯工具制品有限公司 | Optical extensometer |
| WO2016018541A1 (en) * | 2014-07-28 | 2016-02-04 | Illinois Tool Works Inc. | Real-time video extensometer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547129A (en) * | 2014-10-13 | 2016-05-04 | 斯凯孚公司 | Method and data processing device for determining a spacing of rolling elements |
| US10788382B2 (en) | 2014-10-13 | 2020-09-29 | Aktiebolaget Skf | Method and data processing device for detecting a load distribution in a roller bearing |
| CN113227705A (en) * | 2018-10-02 | 2021-08-06 | 沙特阿拉伯石油公司 | Optical hand-held strain measurement device enclosed in a housing containing a light source |
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| PB01 | Publication | ||
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Application publication date: 20171121 |