CN104792297A - Calibration device for extensometer - Google Patents
Calibration device for extensometer Download PDFInfo
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- CN104792297A CN104792297A CN201510192270.1A CN201510192270A CN104792297A CN 104792297 A CN104792297 A CN 104792297A CN 201510192270 A CN201510192270 A CN 201510192270A CN 104792297 A CN104792297 A CN 104792297A
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- extensometer
- camera
- boss
- calibrating installation
- lifting unit
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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
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides a calibration device for an extensometer. The calibration device comprises a fixing adjusting part, an acquiring adjusting part, a control part and a calibrating acquiring part; the fixing adjusting part comprises a body, a fixed boss, a moving boss, an adjusting unit and a calibrating plate; the adjusting unit connected with the moving boss is used for moving the moving boss; the calibrating plate fixed to the moving boss is provided with a marker; the acquiring adjusting part comprises a camera, a lifting unit and a displacement sensor; the camera is used for acquiring image information of the marker in the horizontal direction; the lifting unit is used for adjusting the position of the camera; the displacement sensor is used for acquiring displacement of the camera; the control part is used for controlling the lifting unit to move; the calibrating acquiring part acquires calibration results according to measurement information and displacement information output by the extensometer; after the adjusting unit adjusts the moving boss to move by a certain distance, the control part controls the lifting unit to move to the corresponding position, and thus the camera is moved to overlap the marker in the currently acquired image information and initially acquired image information.
Description
Technical field
The present invention relates to a kind of extensometer calibrating installation can calibrated extensometer.
Background technology
In material science research field, material deformation amount is the important parameter of investigation of materials, and extensometer is the most frequently used deformation measurement sensing device, can measure the deflection between 2 on material direction.The material deformation amount that extensometer records has significant impact to investigation of materials, calibrates like this with regard to needing to the reliability of extensometer, thus ensures the precision that extensometer is measured.At present, the measurement range of traditional extensometer is less than 25mm, market there is a kind of conventional extensometer calibrating installation be the GWB-200JA extensometer marking apparatus of iron and steel research institute, this marking apparatus is the survey instrument of Purely mechanical, utilize coordinating of screw mandrel and nut, the rotary motion of screw mandrel is become rectilinear motion, and utilizes the proportional relation between rectilinear movement amount and rotation angle to carry out reading, thus realize demarcating extensometer.
But, along with the development of industrial technology, because traditional extensometer measuring accuracy is not high and efficiency is low, and be not suitable in the large investigation of materials of deflection, so wide range extensometer arises, and application more and more extensively starts to replace traditional extensometer even gradually.But this GWB-200JA extensometer marking apparatus extensometer marking apparatus directly contacts with extensometer, can affect stated accuracy, and thisly can only be applicable to traditional small-range extensometer, cannot calibrate wide range extensometer at all.
Summary of the invention
The present invention carries out to solve above-mentioned problem, and object is that providing a kind of carries out accurate calibration to extensometer, the extensometer calibrating installation especially can calibrated the extensometer of wide range.
The invention provides a kind of extensometer calibrating installation, for calibrating extensometer, it is characterized in that, comprise: secured adjusted portion, comprises: body, be fixedly located at body bottom and the fixing lug boss fixed with the bar of fixedly extending of extensometer, packaged type be fixed on body upper end and with the activity of extensometer extend mobile boss that bar fixes, to be connected with mobile boss for mobile this move boss regulon, fix with mobile boss and be provided with the scaling board of mark; Gather adjusting portion, comprise: in the horizontal direction to mark image information gather camera, for regulating the lifting unit of camera position, the displacement transducer for the displacement information of acquisition camera; Control part, moves for controlling lifting unit; And calibration obtaining portion, the metrical information exported according to extensometer and displacement information obtain calibration result, wherein, after regulon regulates mobile boss to move a certain distance, control part controls lifting unit and moves opposite position, thus make camera move to current collection image information and initial time the image information that gathers in mark coincide.
In extensometer calibrating installation provided by the invention, such feature can also be had: wherein, lifting unit comprises: vertical place lifting table, be located at lifting table towards the guide rail on a sidewall of scaling board, for fixedly mounting camera and being entrenched in mobile platform on guide rail, for driving mobile platform along the motor of movement on guide rail, control part is connected with motor, for controlling the running of motor thus controlling camera in the position of guide rail.
In extensometer calibrating installation provided by the invention, also there is such feature, also comprise: installation portion, comprise: for fixedly mount lifting unit mounting seat, be located at mounting seat lower end for regulating the adjustment screw of the levelness of this mounting seat.
In extensometer calibrating installation provided by the invention, can also have such feature: wherein, installation portion also comprises the level meter whether being in surface level for detecting mounting seat.
In extensometer calibrating installation provided by the invention, can also have such feature: wherein, calibration obtaining portion comprises: to be connected with displacement transducer for comparing and measuring information and displacement information and obtaining the alignment unit of calibration result and the display unit for showing calibration result with extensometer.
In extensometer calibrating installation provided by the invention, can also have such feature: wherein, camera is CCD camera.
In extensometer calibrating installation provided by the invention, such feature can also be had: wherein, the shape of mark be in circular, square, rectangle and rhombus any one.
In extensometer calibrating installation provided by the invention, can also have such feature: wherein, displacement transducer adopts grating scale or magnetic railings ruler.
The effect of invention and effect
According to extensometer calibrating installation involved in the present invention, because fixing lug boss and mobile boss clamp tested extensometer respectively, fixedly extend bar and activity is extended bar, and, mobile boss is fixed with scaling board, scaling board and the activity of extensometer are extended together with bar and are moved, the image information of camera collection scaling board, and the position being identified at image information of initial timestamp being determined plate is as initial position, lifting unit regulates the position of camera, driver element makes mobile boss move a certain distance, control module control lifting unit lifting thus make camera collection to image information in the position that identifies corresponding with initial position, the displacement information of displacement transducer acquisition camera movement, then, the metrical information that extensometer exports by comparing unit and displacement information compare, thus obtain comparative result, therefore, extensometer calibrating installation of the present invention can carry out accurate calibration to traditional extensometer, especially also can also to calibrate wide range extensometer and to have structure simple, reproducible advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of extensometer calibrating installation in embodiments of the invention;
Fig. 2 is the structural representation of lifting unit in embodiments of the invention;
Fig. 3 is the structural representation of installation portion in embodiments of the invention;
Fig. 4 is the image information schematic diagram of camera in embodiments of the invention; And
Fig. 5 is the test unit schematic diagram of embodiments of the invention.
Concrete case study on implementation
The technological means realized to make the present invention, creation characteristic, reach object and effect is easy to understand, following examples are specifically addressed extensometer calibrating installation of the present invention by reference to the accompanying drawings.
Fig. 1 is the structural representation of extensometer calibrating installation in embodiments of the invention.
As shown in Figure 1, in the present embodiment, extensometer calibrating installation 100 is for carrying out accurate calibration to extensometer 200 to be measured, and extensometer calibrating installation 100 comprises: secured adjusted portion 10, collection adjusting portion 20, control part 30, installation portion 40 and calibration obtaining portion 50.Secured adjusted portion 10, for clamping and driving extensometer 200, gathers adjusting portion 20 and is arranged on above installation portion 40, and setting corresponding with the position of extensometer 200.
Secured adjusted portion 10 clamps extensometer 200, comprises: body 11, fixing lug boss 12, mobile boss 13, regulon 14 and scaling board 15.Extensometer 200 is placed on body 11.
Fixing lug boss 12 is fixedly located at the position, bottom of body 11, and fixing lug boss 12 comprises: lower end fixture 12a and lower end round bar 12b.Lower end fixture 12a and body 11 are integrated, and lower end round bar 12b is by lower end fixture 12a fixed clamp.Extensometer 200 fixedly extend bar 201 fixed clamp on the round bar 12b of lower end.
Mobile boss 13 packaged type is located at the position, upper end of body 11, and mobile boss 13 comprises: upper end-fixture 13a and upper end round bar 13b.Upper end round bar 13b is by upper end-fixture 13a fixed clamp, and the activity of extensometer 200 extends bar 202 fixed clamp on the round bar 13b of upper end.
Regulon 14 is connected with upper end-fixture 13a, moves a certain distance for driving upper end-fixture 13a in the vertical direction.In the present embodiment, cupping machine is adopted to realize each function of body 11, lower end fixture 12a, upper end-fixture 13a and regulon 14.
Scaling board 15 is for carrying out location position, and scaling board 15 is rectangular plate-like, is marked with circular indicia A in the center of scaling board 15.
Gather adjusting portion 20 just to arrange circular indicia A, gather the image information of circular indicia A for correspondence.Gather adjusting portion 20 to comprise: camera 21, lifting unit 22 and displacement transducer 23.
Camera 21 is just installed on lifting unit 22 to scaling board 15, and camera 21 is for gathering the image information of corresponding region, in the present embodiment, camera 21 adopts CCD camera.
Fig. 2 is the structural representation of lifting unit in embodiments of the invention.
As shown in Figure 2, lifting unit 22 is for regulating the position of camera 21, and lifting unit 22 comprises: lifting table 22a, guide rail 22b, mobile platform 22c, motor 22d and screw mandrel 22e.
Lifting table 22a vertical ground is placed, and guide rail 22b is laid on lifting table 22a towards on a side of scaling board 15.Mobile platform 22c is entrenched on guide rail 22b, and moves along guide rail 22b in the vertical direction, and in addition, mobile platform 22c is provided with mounting hole, for installing camera 21.Motor 22d is connected with mobile platform 22c by screw mandrel 22e, and motor 22d is for driving screw mandrel 22e thus driving mobile platform 22c to move along guide rail 22b.
Displacement transducer 23 is connected with camera 21, for the displacement information of acquisition camera 21.In the present embodiment, displacement transducer 23 adopts grating scale.
Control part 30 is connected with displacement transducer 23 with camera 21, for controlling the rotation of the motor 22d in lifting unit 22, mobile mobile platform 22c thus drive camera 21 move.
Calibration obtaining portion 50 is connected with displacement transducer 23 with extensometer 200, comprises: alignment unit 51 and display unit 52.The displacement information that alignment unit 51 gathers for the metrical information that exported by extensometer 200 and displacement transducer 23 compares, and finally obtains calibration result.Display unit 52 is for showing calibration result.In addition, calibrating obtaining portion 50 also can be that operating personnel carry out manual calibration.
Fig. 3 is the structural representation of installation portion in embodiments of the invention.
As shown in Figure 3, installation portion 40 is for installing lifting unit 22, and installation portion 40 comprises mounting seat 41, adjustment screw 42 and two level meters 43.
Mounting seat 41 comprises: four seat leg 41a, through hole 41b and four mounting hole 41c.Lifting unit 22 is arranged in mounting seat 41 by four mounting hole 41c, gets out of the way motor 22d by through hole 41b.Adjustment screw 42 is for adjusting the levelness of mounting seat 41, and four adjustment screws 42 are arranged on the bottom of four seat leg 41a respectively.Two level meters 43 are located on the side of mounting seat 41 respectively, whether are in surface level for detecting mounting seat 41.
Fig. 4 is the workflow diagram of extensometer calibrating installation in embodiments of the invention.
As shown in Figure 4, in the present embodiment, the concrete calibration steps of extensometer calibrating installation 100 is as follows:
Step S1, first, according to the position adjustments adjustment screw 42 of spirit bubble in level meter 43, makes mounting seat 41 be on surface level, then enters step S2.
Step S2, the position now setting scaling board place is initial position, initial position camera 21 gather in the horizontal direction the image information of scaling board 15 namely, initial pictures, in initial pictures the position coordinates of circular indicia A be (a, b) as shown in Figure 5; Then step S3 is entered.
Step S3, operating personnel regulate regulon 14 to make mobile boss 13 move preset distance, then enter step S4.
Step S4, control part 30 controls motor 22d and rotates, thus makes mobile platform 22c drive camera 21 to move towards scaling board 15, then enters step S5.
Step S5, according to the current image information collected of camera 21 namely, present image, control part 30 judges whether present image overlaps with initial pictures, the i.e. circular indicia A that collects of camera 21 whether same position in the picture, thus make the displacement of camera 21 movement consistent with the displacement of scaling board 15 movement, when judging that present image does not overlap with initial pictures, enter step S4; When judging that present image overlaps with initial pictures, enter step S6.
Step S6, control part 30 controls motor 22d and stops operating, and then enters step S7.
Step S7, the displacement information of displacement transducer 23 acquisition camera 21 movement on guide rail 22b, then enters step S8.
Step S8, the metrical information that alignment unit 51 exports according to extensometer 200 and the displacement information that displacement transducer 23 gathers compare, and obtain, about the calibration result of extensometer 200, then entering done state.
Fig. 5 is the test unit schematic diagram of embodiments of the invention.
As shown in Figure 5, adopt the extensometer calibrating installation 100 of laser displacement sensor 300 pairs of the present embodiment to test, lower end round bar 12b sets up a platform 301.Because extensometer calibrating installation 100 can measurement range be 25mm ~ 500mm, and laser displacement sensor 300 cannot keep high-precision measurement within the scope of this, so in contrast uses, by adopting three, laser displacement sensor (is respectively a 20mm ~ 100mm for twice, No. two 100mm ~ 300mm, No. three 300mm ~ 500mm), the limits of error ± 0.02% of three laser displacement sensors.During test, laser displacement sensor 300 is placed on platform 301, and be tested plane with the bottom of scaling board 15, first, mobile boss 13 is regulated to move preset distance by regulon 14, then control part 30 controls camera 21 and moves to correspondence position, finally, using the displacement information of laser displacement sensor 300 collection as standard, the displacement information that the displacement information obtain displacement transducer 23 and laser displacement sensor 300 gather compares, show through test findings, the maximum error of extensometer calibrating installation 100 is 0.09%, so the extensometer calibrating installation 100 of the present embodiment has higher precision.
The effect of embodiment and effect
Extensometer calibrating installation involved by the present embodiment, because fixing lug boss and mobile boss clamp tested extensometer respectively, fixedly extend bar and activity is extended bar, and, mobile boss is fixed with scaling board, scaling board and the activity of extensometer are extended together with bar and are moved, the image information of camera collection scaling board, and the position being identified at image information of initial timestamp being determined plate is as initial position, lifting unit regulates the position of camera, driver element makes mobile boss move a certain distance, control module control lifting unit lifting thus make camera collection to image information in the position that identifies corresponding with initial position, the displacement information of displacement transducer acquisition camera movement, then, the metrical information that extensometer exports by comparing unit and displacement information compare, thus obtain comparative result, therefore, the extensometer calibrating installation of the present embodiment not only can carry out accurate calibration to traditional extensometer, especially accurate calibration can be carried out to wide range extensometer, and it is simple to have structure, reproducible advantage.
In the present embodiment, because installation portion has level meter and set screw, therefore, the present embodiment can ensure that lifting unit moves in vertical direction, thus guarantees that testing result is accurate.
In the present embodiment, due to mobile platform fixed installation camera and moving on guide rail, therefore camera can steadily movement, thus makes the image of camera collection more clear.
Above-mentioned embodiment is preferred case of the present invention, is not used for limiting the scope of the invention.
Claims (8)
1. an extensometer calibrating installation, for calibrating extensometer, is characterized in that, comprising:
Secured adjusted portion, comprises: body, be fixedly located at described body bottom and the fixing lug boss fixed with the bar of fixedly extending of described extensometer, packaged type be fixed on described body upper end and with the activity of described extensometer extend mobile boss that bar fixes, to be connected with described mobile boss for mobile this move boss regulon, fix with described mobile boss and be provided with the scaling board of mark;
Gather adjusting portion, comprise: the camera in the horizontal direction image information of described mark gathered, for regulating the lifting unit of described camera position, for gathering the displacement transducer of the displacement information of described camera;
Control part, moves for controlling described lifting unit; And
Calibration obtaining portion, the metrical information exported according to described extensometer and institute's displacement information obtain calibration result,
Wherein, after described regulon regulates described mobile boss to move a certain distance, described control part controls described lifting unit and moves opposite position, thus make described camera move to current collection image information and initial time the image information that gathers in described mark coincide.
2. extensometer calibrating installation according to claim 1, is characterized in that:
Wherein, described lifting unit comprises: vertical place lifting table, be located at described lifting table towards the guide rail on a sidewall of described scaling board, for fixedly mounting described camera and being entrenched in mobile platform on described guide rail, for driving described mobile platform along the motor of movement on described guide rail
Described control part is connected with described motor, for controlling the running of described motor thus controlling the position of described camera at described guide rail.
3. extensometer calibrating installation according to claim 1, is characterized in that, also comprise:
Installation portion, comprises: for fixedly mount described lifting unit mounting seat, be located at described mounting seat lower end for regulating the adjustment screw of the levelness of this mounting seat.
4. extensometer calibrating installation according to claim 3, is characterized in that:
Wherein, described installation portion also comprises the level meter whether being in surface level for detecting described mounting seat.
5. extensometer calibrating installation according to claim 1, is characterized in that:
Wherein, described calibration obtaining portion comprises: be connected for more described metrical information and institute's displacement information with described extensometer with institute displacement sensors and obtain the alignment unit of described calibration result and the display unit for showing described calibration result.
6. extensometer calibrating installation according to claim 1, is characterized in that:
Wherein, described camera is CCD camera.
7. extensometer calibrating installation according to claim 1, is characterized in that:
Wherein, the shape of described mark be in circular, square, rectangle and rhombus any one.
8. extensometer calibrating installation according to claim 1, is characterized in that:
Wherein, institute's displacement sensors adopts grating scale or magnetic railings ruler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510192270.1A CN104792297A (en) | 2015-04-20 | 2015-04-20 | Calibration device for extensometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510192270.1A CN104792297A (en) | 2015-04-20 | 2015-04-20 | Calibration device for extensometer |
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| CN104792297A true CN104792297A (en) | 2015-07-22 |
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| CN201510192270.1A Pending CN104792297A (en) | 2015-04-20 | 2015-04-20 | Calibration device for extensometer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106558077A (en) * | 2015-09-18 | 2017-04-05 | 中兴通讯股份有限公司 | The antidote and device of site error |
| JP2019517002A (en) * | 2016-05-24 | 2019-06-20 | イリノイ トゥール ワークス インコーポレイティド | Three-dimensional calibration tool and method |
| CN110319760A (en) * | 2018-03-30 | 2019-10-11 | 中国石油天然气股份有限公司 | Rock deformation extensometer caliberating device and scaling method |
| CN111678667A (en) * | 2020-06-17 | 2020-09-18 | 哈尔滨工业大学 | High-frequency testing machine, compact tensile test fixture switching device and using method |
| CN111879648A (en) * | 2020-07-24 | 2020-11-03 | 三峡大学 | Elastic modulus calibration method |
| CN112254744A (en) * | 2020-10-23 | 2021-01-22 | 广州计量检测技术研究院 | Bubble level meter calibration method, system, device and storage medium |
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| CN111879648A (en) * | 2020-07-24 | 2020-11-03 | 三峡大学 | Elastic modulus calibration method |
| CN112254744A (en) * | 2020-10-23 | 2021-01-22 | 广州计量检测技术研究院 | Bubble level meter calibration method, system, device and storage medium |
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Application publication date: 20150722 |