CN203629779U - Device for testing flexural stiffness of structural component in high and low-temperature environments - Google Patents
Device for testing flexural stiffness of structural component in high and low-temperature environments Download PDFInfo
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- CN203629779U CN203629779U CN201320582601.9U CN201320582601U CN203629779U CN 203629779 U CN203629779 U CN 203629779U CN 201320582601 U CN201320582601 U CN 201320582601U CN 203629779 U CN203629779 U CN 203629779U
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- 238000012360 testing method Methods 0.000 title abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000007667 floating Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 11
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 238000005188 flotation Methods 0.000 abstract 11
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
A device for testing the flexural stiffness of a structural component in high and low-temperature environments is provided. The device includes a laser measurement assembly , air flotation devices, a lifting device, a movable crossbeam, pull ropes and a high and low temperature box; each air flotation device comprises an air flotation shaft and an air flotation sleeve; the movable crossbeam is arranged on the lifting device in a sheathed manner; two sets of air flotation devices exist; the air flotation shafts are fixed on the movable crossbeam through air flotation bearing seats; the air flotation sleeves sleeve the air flotation shafts; a tested object is mounted on a tested object mounting seat in the high and low temperature box; the pull ropes vertically pass through through holes at the top of the high and low temperature box so as to be connected with the air flotation sleeves and the tested object; and the laser measurement assembly is fixed outside the high and low temperature box and is opposite to an observation window at a side surface of the high and low temperature box. According to the device of the utility model, the high temperature-resistant pull ropes are adopted to load a force, and the air flotation devices are utilized to obtain the magnitude of the arm of the force, and therefore, the direction of the force can be ensured; and a sensor is utilized to measure pull forces on the ropes; and the laser measurement assembly is utilized to obtain rotation angle deformation; all data are transmitted by a wireless data transmission module; and the bending moment-angular deformation curve of the flexural stiffness of the tested object can be accurately obtained.
Description
Technical field
The utility model relates to the bendind rigidity field tests under member high and low temperature environment condition.
Background technology
When structural member is carried out to rigidity test as being all to carry out at normal temperatures conventionally without specific (special) requirements, existing rigidity test is according to different test requests and application, there are several different methods and structure, but for the stiffness of structural member test in high and low temperature environment, because test fixture fixture, load maintainer etc. can produce distortion under high and low temperature environment, thereby the measurement of the loading of influence power, moment and angle, moreover because of the mistake of environment cold overheated, great majority test cannot normally be used with exact instrument or equipment, affect the carrying out of test job.
Bendind rigidity test under present stage high low temperature is carried out in high-low temperature chamber, and described mechanism part is placed in high-low temperature chamber, and described measured piece is semi-girder.To be that CN200810124707.8's mentioned in " laser amplifying measurement method of bending structure deformation " a kind of that generating laser is fixed on member rotation angle position to be measured for number of patent application, a kind of stiffness of structural member method of testing of utilizing optical lever principle that microdeformation is amplified, can realize non-contact measurement.But for the rigidity test under high low temperature, generating laser can not be positioned on member, and in test process, must consider the deformation quantity of support.Number of patent application is the measuring method that " high precision measuring system of the three-dimensional microdeformation of mechanical hook-up in high-low temperature chamber " that 201110370253.4 the 3 D deformation measurement mechanism of measured piece " high-low temperature chamber in " and number of patent application are 201110370271.2 provides a kind of high-low temperature chamber inner member 3 D deformation, but these class methods can only be followed certain any three-D displacement, and rigidity test need obtain the size of accurate loading force and the arm of force.
Summary of the invention
In order to overcome the impact under high and low temperature environment, improve reliability and the measuring accuracy requirement of bendind rigidity test, the utility model provide a kind of high precision to load and the high and low temperature environment measured under device for testing stiffness.
The utility model solves the technical scheme that its technical matters adopts:
A bendind rigidity proving installation to structural member under high and low temperature environment, its proving installation comprises laser measurement group, air-floating apparatus, jacking gear, moving beam, stay cord, high-low temperature chamber.Described air-floating apparatus comprises air-bearing shafts, air supporting cover.
Described jacking gear is positioned at outside high-low temperature chamber, and described moving beam is sleeved on jacking gear and can moves up and down.
Described air-floating apparatus has two covers, and the air-bearing shafts of described air-floating apparatus is fixed on moving beam by air-bearing shafts bearing, and described air supporting cover is sleeved on described air-bearing shafts, and grating displacement sensor and wireless data transfer module are all installed on described air-bearing shafts.
Through hole is arranged at described high-low temperature chamber top, and side is provided with view window.In described high-low temperature chamber, place measured piece mount pad, on described measured piece mount pad, measured piece is installed.Described stay cord vertically connects air supporting cover and measured piece through the through hole at high-low temperature chamber top, and described the first stay cord intermediate sleeve has spring, and lower end is sleeved on one end that measured piece connects measured piece mount pad, and described the second stay cord upper end is connected with air supporting cover by power sensor.
Described laser measurement group comprises pyramid reflective mirror, laser head and computing module, it is outer and relative with the observation window position of high-low temperature chamber side that described laser head is fixed on high-low temperature chamber, described pyramid reflective mirror is separately fixed on measured piece end and measured piece mount pad by pyramid reflective mirror mount pad, it is definite value that pyramid reflective mirror on described pyramid reflective mirror mount pad has two and spacing, the corresponding pyramid reflective mirror of described each laser head.
Further, described grating displacement sensor, power sensor and wireless data transfer module are battery-powered.
Further, described stay cord is aramid fiber rope.
Further again, described jacking gear can be as the device of the moving beam the controlled lifting of line slideway and ball-screw formation.
Measuring method of the present utility model is:
1, adjust laser head, make the laser beam of laser head transmitting through the reflection of pyramid reflective mirror, between two pyramid reflective mirrors on same pyramid reflective mirror mount pad, optical path difference is zero.
2, sealing high-low temperature chamber, makes it reach test temperature required, after temperature is steady, measures the vertical range L between the first stay cord and the second stay cord
0, grating displacement sensor makes zero.
3, control moving beam and move up and down, apply pulling force by the second stay cord, read the size of real-time tensile force f by power sensor.
4, the offset displacement that utilizes grating displacement sensor on air-bearing shafts to obtain air supporting cover is X
1, X
2, set a positive dirction, any time arm of force L=L
0+ X
2-X
1.
5, survey the distortion of measured piece corner by laser measurement group: apply after moment of flexure, measured piece distortion, laser beam reflection light path changes, and two pyramid reflective mirror spacing on same pyramid reflective mirror mount pad are d, both are designated as s at optical path difference, corner distortion θ=arcsin (s/2d).On measured piece and measured piece mount pad, catoptron is all installed, obtaining corner deformation measurement value on measured piece by computing module is θ 1, and on measured piece mount pad, corner deformation measurement value is θ
2, the distortion of measured piece actual rotational angle is θ '=θ 1-θ
2.
6, by measured tensile force f, arm of force L, corner distortion θ ', drafting can reflect moment of flexure-angular deformation curve of measured piece bendind rigidity.
Mentality of designing of the present utility model is:
Under high and low temperature environment, great majority tests cannot normally be used with exact instrument or equipment, and measured piece base and measured piece can produce distortion because expanding with heat and contract with cold, and test and will have increased very large difficulty to bendind rigidity.The utility model adopts high temperature resistant stay cord to carry out the loading of power, utilize air-floating apparatus to obtain the size of the arm of force and the direction of guarantee effect power, the power sensor of utilization records the pulling force on rope, utilize laser measurement group to obtain corner distortion, all data send through wireless data transfer module, thereby accurately obtain moment of flexure-angular deformation curve of surveying part bendind rigidity.
High temperature resistant stay cord has superhigh intensity, high-modulus and high temperature resistant, acid-fast alkali-proof, the performance such as lightweight, can under hot vacuum environment, use.Stay cord and air supporting cover are fixing, and air supporting cover can be without friction slip on air-bearing shafts, therefore in measured piece deformation process, can guarantee all the time the vertical of stay cord.The first stay cord intermediate sleeve has spring, can guarantee that stay cord has certain flexible remaining and remains vertical state, does not produce additional force, and moving beam moves and drives the second stay cord to load.The arm of force is the vertical range between the first stay cord and the second stay cord, can measure in real time by grating displacement sensor.
The corresponding corner distortion of measured piece can be carried out non-contact measurement by laser measurement group.Wherein laser measurement group has been applied Principles of Radar, Doppler frequency difference effect and optical heterodyne principle, and while utilizing catoptron to move, laser beam reflects the frequency displacement producing and carries out displacement measurement.Also arranging one group of laser head and pyramid reflective mirror at measured piece mount pad, measure its angular deformation amount, is for avoiding the stressed generation additional deformations such as frock clamp to mix in stiffness of structural member test.Finally, by calculating the distortion angle at member two ends, its difference is member actual flexure angle, and measuring accuracy is high.
Described grating displacement sensor, power sensor and wireless data transfer module are battery-powered, have eliminated the additional force impact that signal wire produces measured piece deformation measurement.Meanwhile, all outsides of sweat box of laser head, sensor electron device, have eliminated the impact of high low temperature on its normal work.
The beneficial effects of the utility model are mainly manifested in: can under high and low temperature environment, carry out bendind rigidity test to structural member, easy to use, reliability is strong, has that measuring accuracy is high, real-time good, can export the feature such as moment of flexure-rotation curve of reflection flexural stiffness of member characteristic.
Accompanying drawing explanation
Fig. 1 be a kind of to structural member the bendind rigidity proving installation schematic diagram under high and low temperature environment.
Fig. 2 is that outer corner measurement calculates schematic diagram.
Embodiment:
By reference to the accompanying drawings, a kind of to structural member the bendind rigidity proving installation under high and low temperature environment, its proving installation comprises laser measurement group, air-floating apparatus, jacking gear 1, moving beam 2, stay cord 7, high-low temperature chamber etc.Described air-floating apparatus comprises air-bearing shafts 16, air supporting cover 5.
Described jacking gear 1 is positioned at outside high-low temperature chamber, and described moving beam 2 is sleeved on jacking gear 1 and can moves up and down.
Described air-floating apparatus has two covers, the air-bearing shafts 16 of described air-floating apparatus is fixed on moving beam 2 by air-bearing shafts bearing 3, described air supporting cover 5 is sleeved on described air-bearing shafts 16, and grating displacement sensor 4 and wireless data transfer module 15 are all installed on described air-bearing shafts 16.
Through hole is arranged at described high-low temperature chamber 12 tops, and side is provided with view window.The interior placement measured piece of described high-low temperature chamber 12 mount pad 13, installs measured piece 11 on described measured piece mount pad 13.Described stay cord 7 vertically connects air supporting cover 5 and measured piece 11 through the through hole at high-low temperature chamber 12 tops, described the first stay cord intermediate sleeve has spring 14, lower end is sleeved on one end that measured piece 11 connects measured piece mount pad 13, and described the second stay cord upper end is connected with air supporting cover 5 by power sensor 6.Parallel described the second stay cord of described the first stay cord and remain vertical state.
Described laser measurement group comprises pyramid reflective mirror 10, laser head 8 and computing module, it is outer and relative with the observation window position of high-low temperature chamber side that described laser head 8 is fixed on high-low temperature chamber 12, described pyramid reflective mirror 10 is separately fixed on measured piece 11 and measured piece mount pad 13 by pyramid reflective mirror mount pad 9, the vertical measured piece 11 of described pyramid reflective mirror mount pad 9, described pyramid reflective mirror is installed pyramid reflective mirror on 9, and to have two and spacing be d, the corresponding pyramid reflective mirror 10 of described each laser head 8.
On a pyramid reflective mirror mount pad, have two pyramid reflective mirrors, known its spacing is d.As shown in Figure 2, when original state (two reflective mirror vertical with light be the vertical light of AB), laser head H1, H2 are to two reflective mirrors at A, B place Emission Lasers receiving respectively, and now the difference of light path is zero; Apply after moment of flexure, two reflective mirrors of measured piece distortion move to respectively C, D two places.Thereby can obtain respectively AC, the BD distance at radiation direction from two laser heads, both optical path differences are s, delt1=s/2, so corner distortion θ
1=arcsin (delt1/d)=arcsin (s/2d).In like manner can obtain the corner distortion θ of the measured piece other end
2=arcsin (delt2/d), is θ '=θ 1-θ so can obtain the distortion of measured piece actual rotational angle
2.
Further, described grating displacement sensor 4, power sensor 6 and wireless data transfer module 15 are battery-powered.
Further, described stay cord 7 is aramid fiber rope.
Further again, described jacking gear 1 can be the device that line slideway, ball-screw etc. can be controlled moving beam 2 liftings.
In the present embodiment, measured piece 11 and reflective mirror mount pad 9 are in high-low temperature chamber 12, then hang on air-bearing shafts 16 with high temperature resistant stay cord 7, utilize power sensor 6 to record the pulling force on rope, record again the arm of force of pulling force by grating displacement sensor 4, the data obtained is sent to host computer through wireless data transfer module 15, and result obtains accurate moment; Utilize laser measurement group to obtain the angular distortion of measured piece 11, last, utilize gained moment and angular distortion amount can calculate the rigidity of measured piece.
Claims (4)
1. the bendind rigidity proving installation under high and low temperature environment to structural member, its proving installation comprises laser measurement group, air-floating apparatus, jacking gear, moving beam, stay cord, high-low temperature chamber; Described air-floating apparatus comprises air-bearing shafts, air supporting cover;
Described jacking gear is positioned at outside high-low temperature chamber, and described moving beam is sleeved on jacking gear and can moves up and down;
Described air-floating apparatus has two covers, and the air-bearing shafts of described air-floating apparatus is fixed on moving beam by air-bearing shafts bearing, and described air supporting cover is sleeved on described air-bearing shafts, and grating displacement sensor and wireless data transfer module are all installed on described air-bearing shafts;
Through hole is arranged at described high-low temperature chamber top, and side is provided with view window; In described high-low temperature chamber, place measured piece mount pad, on described measured piece mount pad, measured piece is installed; Described stay cord vertically connects air supporting cover and measured piece through the through hole at high-low temperature chamber top, and described the first stay cord intermediate sleeve has spring, and lower end is sleeved on one end that measured piece connects measured piece mount pad, and described the second stay cord upper end is connected with air supporting cover by power sensor;
Described laser measurement group comprises pyramid reflective mirror, laser head and computing module; It is outer and relative with the observation window position of high-low temperature chamber side that described laser head is fixed on high-low temperature chamber, described pyramid reflective mirror is separately fixed on measured piece end and measured piece mount pad by pyramid reflective mirror mount pad, it is definite value that pyramid reflective mirror on described pyramid reflective mirror mount pad has two and spacing, the corresponding pyramid reflective mirror of described each laser head.
As claimed in claim 1 a kind of to structural member the bendind rigidity proving installation under high and low temperature environment, it is characterized in that: described grating displacement sensor, power sensor and wireless data transfer module are battery-powered.
As claimed in claim 1 a kind of to structural member the bendind rigidity proving installation under high and low temperature environment, it is characterized in that: described stay cord is aramid fiber rope.
As claimed in claim 1 a kind of to structural member the bendind rigidity proving installation under high and low temperature environment, it is characterized in that: described jacking gear can be the device of the moving beam the controlled lifting that forms as line slideway and ball-screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582601.9U CN203629779U (en) | 2013-09-18 | 2013-09-18 | Device for testing flexural stiffness of structural component in high and low-temperature environments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582601.9U CN203629779U (en) | 2013-09-18 | 2013-09-18 | Device for testing flexural stiffness of structural component in high and low-temperature environments |
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| Publication Number | Publication Date |
|---|---|
| CN203629779U true CN203629779U (en) | 2014-06-04 |
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|---|---|---|---|
| CN201320582601.9U Expired - Lifetime CN203629779U (en) | 2013-09-18 | 2013-09-18 | Device for testing flexural stiffness of structural component in high and low-temperature environments |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487223A (en) * | 2013-09-18 | 2014-01-01 | 浙江工业大学 | Device for measuring flexural rigidity of structural member in high-low temperature environments |
| CN104502086A (en) * | 2014-12-18 | 2015-04-08 | 孙海滨 | High-temperature relaxation measurement device for helical compression springs |
| CN110005821A (en) * | 2019-04-13 | 2019-07-12 | 江西理工大学南昌校区 | A kind of horizontal four-degree-of-freedom of high-low temperature chamber wears case axis gas-tight sealing |
| CN112254905A (en) * | 2020-10-15 | 2021-01-22 | 哈尔滨工业大学 | High-low temperature testing device for moment rotary rigidity |
-
2013
- 2013-09-18 CN CN201320582601.9U patent/CN203629779U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487223A (en) * | 2013-09-18 | 2014-01-01 | 浙江工业大学 | Device for measuring flexural rigidity of structural member in high-low temperature environments |
| CN104502086A (en) * | 2014-12-18 | 2015-04-08 | 孙海滨 | High-temperature relaxation measurement device for helical compression springs |
| CN110005821A (en) * | 2019-04-13 | 2019-07-12 | 江西理工大学南昌校区 | A kind of horizontal four-degree-of-freedom of high-low temperature chamber wears case axis gas-tight sealing |
| CN112254905A (en) * | 2020-10-15 | 2021-01-22 | 哈尔滨工业大学 | High-low temperature testing device for moment rotary rigidity |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20150819 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20150819 |
|
| RGAV | Abandon patent right to avoid regrant |