CN103487223A - Device for measuring flexural rigidity of structural member in high-low temperature environments - Google Patents
Device for measuring flexural rigidity of structural member in high-low temperature environments Download PDFInfo
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- CN103487223A CN103487223A CN201310430364.9A CN201310430364A CN103487223A CN 103487223 A CN103487223 A CN 103487223A CN 201310430364 A CN201310430364 A CN 201310430364A CN 103487223 A CN103487223 A CN 103487223A
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- 238000007667 floating Methods 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 19
- 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
- 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
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Abstract
A device for measuring the flexural rigidity of a structural member in the high-low temperature environments comprises a laser measuring set, air floating devices, a lifting device, a moving beam, high-low temperature resistant pulling ropes and the like. The moving beam is arranged on the lifting device in a sleeved mode. The two sets of air floating devices are arranged. Each air floating shaft is fixed to the moving beam through an air floating bearing seat. Each air floating shaft is sleeved with an air floating sleeve. The member to be measured is installed on an installation base of the member to be measured in a high-low temperature box. Each high-low temperature resistant pulling rope vertically penetrates through a through hole in the top of the high-low temperature box and is connected with one air floating sleeve and the member to be measured. The laser measuring set is fixed to the outer side of the high-low temperature box and opposite to an observation window in the side face of the high-low temperature box in position. According to the device for measuring the flexural rigidity of the structural member in the high-low temperature environments, force is exerted through the high-low temperature resistant pulling ropes, the arm of force is obtained through the air floating devices, the direction of the acting force is guaranteed through the air floating devices, the tension of each rope is measured through a force sensor, angular deformation is obtained through the laser measuring set, all data are transmitted through a wireless data transmission module, and therefore a bending moment-angular deformation curve of the flexural rigidity of the member to be measured is accurately obtained.
Description
Technical field
The present invention 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 be all to carry out at normal temperatures usually without specific (special) requirements, existing rigidity test is according to different test requests and application, several different methods and structure are arranged, but test for the stiffness of structural member 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, the great majority test can't 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 the 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." high precision measuring system of the three-dimensional microdeformation of mechanical hook-up in high-low temperature chamber " that " the 3 D deformation measurement mechanism of measured piece in high-low temperature chamber " that number of patent application is 201110370253.4 and number of patent application are 201110370271.2 provides a kind of measuring method 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 invention provides device for testing stiffness under the high and low temperature environment that a kind of high precision loads and measure.
The technical solution adopted for the present invention to solve the technical problems is:
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, moving beam, high-low temperature resistant stay cord, high low temperature etc.Described air supporting assembling device 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 the 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 all are installed on described air-bearing shafts.
Through hole is arranged at described high-low temperature chamber top, and side is provided with view window.Place the measured piece mount pad in described high-low temperature chamber, on described measured piece mount pad, measured piece is installed.Described high-low temperature resistant stay cord vertically connects air supporting cover and measured piece through the through hole at high-low temperature chamber top, described the first high-low temperature resistant stay cord intermediate sleeve has low rigid spring, lower end is sleeved on the end that measured piece connects the measured piece mount pad, and described the second high-low temperature resistant stay cord upper end is connected with the air supporting cover by the 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, the described high-low temperature resistant stay cord of stating is the aramid fiber rope.
Further again, described jacking gear can be the device that line slideway, ball-screw etc. can be controlled the moving beam lifting.
Measuring method of the present invention is:
1, adjust laser head, make the laser beam of laser head emission 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, the sealing high-low temperature chamber, make it reach test temperature required, after temperature is steady, measures the vertical range L between the first high-low temperature resistant stay cord and the second high-low temperature resistant stay cord
0, grating displacement sensor makes zero.
3, control moving beam and move up and down, by the second high-low temperature resistant stay cord, apply pulling force, read the size of real-time tensile force f by the power sensor.
4, the offset displacement that utilizes grating displacement sensor on air-bearing shafts to obtain the 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 the laser measurement group: after applying moment of flexure, the measured piece distortion, laser beam reflection light path changes, and two pyramid reflective mirror spacings 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 all is installed, obtaining corner deformation measurement value on measured piece by computing module is θ
1, on the measured piece mount pad, corner deformation measurement value is θ
2,the distortion of measured piece actual rotational angle is
6, draw the moment of flexure that can reflect the measured piece bendind rigidity-angular deformation curve by measured tensile force f, arm of force L, corner distortion θ '.
Mentality of designing of the present invention is:
Under high and low temperature environment, great majority tests can't 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 to bendind rigidity, test and will have increased very large difficulty.The present invention 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 the laser measurement group to obtain the corner distortion, all data send through wireless data transfer module, thus the moment of flexure of accurate acquisition survey part bendind rigidity-angular deformation curve.
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 the air supporting cover can, without friction slip on air-bearing shafts, therefore can guarantee all the time the vertical of stay cord in the measured piece deformation process.The first high-low temperature resistant stay cord intermediate sleeve has low rigid spring, can guarantee that stay cord has certain flexible remaining and remains vertical state, does not produce additional force, and moving beam moves drive the second high-low temperature resistant stay cord and loaded.The arm of force is the vertical range between the first high-low temperature resistant stay cord and the second high-low temperature resistant 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 the laser measurement group.Wherein the laser measurement group has been applied Principles of Radar, Doppler frequency difference effect and optical heterodyne principle, and displacement measurement is carried out in the frequency displacement that while utilizing catoptron to move, the laser beam reflection produces.Also arranging one group of laser head and pyramid reflective mirror at the measured piece mount pad, measure its angular deformation amount, is for avoiding the stressed generation additional deformations such as frock clamp to mix in the 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 the measured piece deformation measurement.Simultaneously, laser head, sensor electron device be the outside of sweat box all, has eliminated the impact of high low temperature on its normal operation.
Beneficial effect of the present invention is mainly manifested in: can under high and low temperature environment, to structural member, carry out the bendind rigidity test, easy to use, reliability is strong, has the characteristics such as moment of flexure-rotation curve that measuring accuracy is high, real-time good, can export reflection flexural stiffness of member characteristic.
The 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, high-low temperature resistant stay cord 7, high-low temperature chamber etc.Described air supporting assembling device 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 all are 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, install measured piece 11 on described measured piece mount pad 13.Described high-low temperature resistant 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 high-low temperature resistant stay cord intermediate sleeve has low rigid spring 14, lower end is sleeved on the end that measured piece 11 connects measured piece mount pad 13, and described the second high-low temperature resistant stay cord upper end is connected with air supporting cover 5 by power sensor 6.Parallel described the second high-low temperature resistant stay cord of described the first high-low temperature resistant 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 two and spacing are arranged is d, the corresponding pyramid reflective mirror 10 of described each laser head 8.
On a pyramid reflective mirror mount pad, two pyramid reflective mirrors are arranged, known its spacing is d.As shown in Figure 2, during 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 being received respectively, and now the difference of light path is zero; After applying 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), be θ '=θ so can obtain the distortion of measured piece actual rotational angle
1-θ
2.
Further, described grating displacement sensor 4, power sensor 6 and wireless data transfer module 15 are battery-powered.
Further, the described high-low temperature resistant stay cord 7 of stating is for the 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 with high temperature resistant stay cord 7, hang on air-bearing shafts 16, 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 the 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)
- One kind 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, moving beam, high-low temperature resistant stay cord, high low temperature etc.; Described air supporting assembling device 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 the 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 all are installed on described air-bearing shafts;Through hole is arranged at described high-low temperature chamber top, and side is provided with view window; Place the measured piece mount pad in described high-low temperature chamber, on described measured piece mount pad, measured piece is installed; Described high-low temperature resistant stay cord vertically connects air supporting cover and measured piece through the through hole at high-low temperature chamber top, described the first high-low temperature resistant stay cord intermediate sleeve has low rigid spring, lower end is sleeved on the end that measured piece connects the measured piece mount pad, and described the second high-low temperature resistant stay cord upper end is connected with the air supporting cover by the 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: the described high-low temperature resistant stay cord of stating is the 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 that line slideway, ball-screw etc. can be controlled the moving beam lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310430364.9A CN103487223B (en) | 2013-09-18 | 2013-09-18 | A kind of to the bendind rigidity proving installation of structural member under high and low temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310430364.9A CN103487223B (en) | 2013-09-18 | 2013-09-18 | A kind of to the bendind rigidity proving installation of structural member under high and low temperature environment |
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| CN103487223B CN103487223B (en) | 2015-08-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697863A (en) * | 2015-01-05 | 2015-06-10 | 武汉华威专用汽车检测有限责任公司 | Rigidity test device and method of vehicle interior ornament |
| CN107830808A (en) * | 2017-12-01 | 2018-03-23 | 中国计量大学 | A kind of calibration method and device of high and low temperature environment grating displacement sensor |
| CN108759703A (en) * | 2018-06-12 | 2018-11-06 | 合肥工业大学 | The device of heat insulation structural deformation in a kind of detection thermal field |
| 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 |
| CN110057572A (en) * | 2019-04-26 | 2019-07-26 | 安徽万荣航天设备有限公司 | A kind of servo valve armature component integral stiffness test device |
| CN111428413A (en) * | 2020-03-31 | 2020-07-17 | 广西交科集团有限公司 | Method for identifying bending rigidity of continuous beam sections |
| CN114509226A (en) * | 2022-04-06 | 2022-05-17 | 天津航天瑞莱科技有限公司 | Metal rubber bearing bending rigidity test device under high and low temperature environment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697863A (en) * | 2015-01-05 | 2015-06-10 | 武汉华威专用汽车检测有限责任公司 | Rigidity test device and method of vehicle interior ornament |
| CN107830808A (en) * | 2017-12-01 | 2018-03-23 | 中国计量大学 | A kind of calibration method and device of high and low temperature environment grating displacement sensor |
| CN107830808B (en) * | 2017-12-01 | 2023-10-10 | 中国计量大学 | Calibration method and device for grating displacement sensor in high-low temperature environment |
| CN108759703A (en) * | 2018-06-12 | 2018-11-06 | 合肥工业大学 | The device of heat insulation structural deformation in a kind of detection thermal field |
| CN108759703B (en) * | 2018-06-12 | 2020-05-05 | 合肥工业大学 | Device for detecting deformation of thermal insulation structure in thermal field |
| 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 |
| CN110057572A (en) * | 2019-04-26 | 2019-07-26 | 安徽万荣航天设备有限公司 | A kind of servo valve armature component integral stiffness test device |
| CN111428413A (en) * | 2020-03-31 | 2020-07-17 | 广西交科集团有限公司 | Method for identifying bending rigidity of continuous beam sections |
| CN111428413B (en) * | 2020-03-31 | 2022-05-31 | 广西交科集团有限公司 | Method for identifying bending rigidity of continuous beam sections |
| CN114509226A (en) * | 2022-04-06 | 2022-05-17 | 天津航天瑞莱科技有限公司 | Metal rubber bearing bending rigidity test device under high and low temperature environment |
| CN114509226B (en) * | 2022-04-06 | 2022-07-22 | 天津航天瑞莱科技有限公司 | Metal rubber bearing bending rigidity test device under high and low temperature environment |
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