CN203606113U - Device accurately measuring flexural rigidity in high- and low-temperature environment - Google Patents
Device accurately measuring flexural rigidity in high- and low-temperature environment Download PDFInfo
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- CN203606113U CN203606113U CN201320582845.7U CN201320582845U CN203606113U CN 203606113 U CN203606113 U CN 203606113U CN 201320582845 U CN201320582845 U CN 201320582845U CN 203606113 U CN203606113 U CN 203606113U
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Abstract
A device accurately measuring flexural rigidity in high- and low-temperature environment comprises an optical lens, a high-rigidity rod, a three-dimension mobile platform, a laser measuring group, a high- and low-temperature box, etc. A measured piece is fixed in the high- and low-temperature box through a measured piece installation seat, the high-rigidity rod vertically passes through the high- and low-temperature box and then acts on the measured piece, the upper end of the high-rigidity rod is fixedly connected to the three-dimension mobile platform through a force sensor, the optical lens is vertically fixed to the high-rigidity rod through an installation seat, the laser measuring group is fixed outside the high- and low-temperature box, and a position of the laser measuring group is relative to a position of an observation window on a side face of the high- and low-temperature box. The movable high-rigidity rod is adopted to perform loading, a force arm is guaranteed to be invariant through the optical lens, and a rotating angle deformation is obtained by utilizing the laser measuring group, so a bending movement-angle deformation curve of the measured piece flexural rigidity can be obtained accurately. The device has the advantages of usage convenience, strong reliability, good real-time capability and high measuring precision.
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 can expanding with heat and contract with cold under high and low temperature environment, test fixture fixture, load maintainer etc. produce distortion, 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 of temperature, improve reliability and the measuring accuracy requirement of bendind rigidity test, the utility model provides a kind of can carry out the stiffness test method under high and low temperature environment condition to structural member.
The utility model solves the technical scheme that its technical matters adopts: under high and low temperature environment, accurately measure the device of bendind rigidity, comprise optical lens, support bar, three-dimensional mobile platform, laser measurement group, high-low temperature chamber.
In described high-low temperature chamber, fix measured piece by measured piece mount pad.
Described support bar lower end is smooth sphere, described high-low temperature chamber top is provided with through hole, described support bar vertically acts on measured piece through the through hole at high-low temperature chamber top, described three-dimensional mobile platform is positioned at the top of high-low temperature chamber, and described post upper is affixed by power sensor and three-dimensional mobile platform.
Described high-low temperature chamber top and side are provided with view window, and described optical lens is vertically fixed on support bar by mount pad, and described optical lens, just to high-low temperature chamber top view window, has the graticule with the accurate heart of cross in described optical lens.
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 and measured piece mount pad by pyramid reflective mirror mount pad, pyramid reflective mirror on described pyramid reflective mirror mount pad has two and spacing to keep certain, the corresponding pyramid reflective mirror of described each laser head.
Method of testing of the present utility model is:
1,, under normal temperature, establish a calibration point at the root center of measured piece and measured piece mount pad.
2, adjust the focal length of optical lens, calibration point is appeared in the eyepiece of optical lens, by the position of three-dimensional mobile platform fine setting support bar, make the accurate heart center superposition of cross of calibration point and graticule, the vertical range value L between note optical lens center and support bar again.
3, sealing high-low temperature chamber, make it reach test temperature required, after temperature is steady, move and load by three-dimensional mobile platform control support bar, adjust support bar makes calibration point be positioned at the cross standard heart in the heart of graticule simultaneously, the power value size F that directly measures loading by sensor, arm of force value is L.
4, 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, the difference of both light paths is designated as s, 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.
5, by measured directed 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 and advantage show:
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 movably support bar to load, and guarantees that by optical lens the arm of force is constant, utilizes laser measurement group to obtain corner distortion, thereby accurately obtains moment of flexure-angular deformation curve of surveying part bendind rigidity.
Support bar is subject to the impact of high and low temperature environment minimum, therefore utilizes support bar to load, and can not consider the deformation effect of loaded members under high and low temperature environment; Support bar lower end is smooth sphere, contacts with measured piece surface sliding, and direction that can guarantee effect power is vertical all the time, between support bar and three-dimensional mobile platform, strong sensor is installed, and can measure very easily the size that acts on power value on measured piece.
Calibrate the position at measured piece and measured piece root center, can be reduced to the rotation angle position of bendind rigidity test.Adjust the cross Zhun Xin center that calibration point is positioned at high-low temperature chamber top optical lens graticule.Because optical lens and support bar are positioned at same plane, force direction is constant, therefore while test, only need to readjust the position of support bar under high and low temperature environment, make calibration point be positioned at the cross Zhun Xin center of graticule, eyepiece center line to the distance at support bar center is arm of force size, and the distortion of measured piece vertical direction does not affect the measurement of the arm of force and the test of bendind rigidity.Optical lens is solidly connected by holder and support bar, can not rotate around support bar, support bar through insulation can and and insulation can have certain gap, can meet the requirement while adjusting, do not affect again the sealing effectiveness of high-low temperature chamber.
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.
The beneficial effects of the utility model are mainly manifested in: can accurately apply moment of flexure and measure bending angle deflection measured piece, and 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 is the device schematic diagram of accurately measuring bendind rigidity under high and low temperature environment
Fig. 2 is eyepiece image schematic diagram
Fig. 3 is that outer corner measurement calculates schematic diagram
Embodiment
In conjunction with Fig. 1 to Fig. 3, under high and low temperature environment, accurately measure the device of bendind rigidity, comprise optical lens 12, support bar 8, power sensor 9, three-dimensional mobile platform 10, pyramid reflective mirror 5, laser doppler instrument etc.
Described measured piece 3 and measured piece mount pad 2 thereof are placed in high-low temperature chamber 1, described support bar 8 one end are fixedly connected with three-dimensional mobile platform 10, described support bar 8 other end ends are smooth sphere and vertically act on measured piece 3 installing force sensor 9 between described support bar 8 and three-dimensional mobile platform 10.
Described optical lens 12 is vertically fixed on support bar 8 by mount pad 11 and is positioned at outside high-low temperature chamber 1, in described optical lens 12, there is the graticule with the accurate heart 14 of cross, described optical lens 12 is just to high-low temperature chamber 1 top view window 7, and described optical lens 12 centers and support bar 8 centers are in same plane.
A calibration point 13 is established at the root center of described measured piece 3 and measured piece mount pad 2.
Described laser measurement group comprises pyramid reflective mirror 5, laser head 6 and computing module; Described measured piece 3 and a pyramid reflective mirror mount pad 4 of measured piece mount pad 2 each installations, described pyramid reflective mirror mount pad vertical support bar, on a described pyramid reflective mirror mount pad 4, two pyramid reflective mirrors 5 are installed, distance between described two pyramid reflective mirrors 5 is d, it is outer and relative with the view window position of high low temperature side that described laser head is arranged on high-low temperature chamber 1, described laser head 6 Emission Lasers reflect through pyramid reflective mirror 5 through view window 7, the corresponding pyramid reflective mirror 5 of described each laser head 6.
Corner cube reflector 5 on described measured piece mount pad 2 and with respect to laser head 6 be not subject to the impact of support bar.
On a pyramid reflective mirror mount pad, have two pyramid reflective mirrors, known its spacing is d.As shown in Figure 3, when original state (two reflective mirror vertical with light be AB ⊥ light), 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.
Claims (1)
1. the device of accurately measuring bendind rigidity under high and low temperature environment, is characterized in that: comprise optical lens, support bar, three-dimensional mobile platform, laser measurement group, high-low temperature chamber; In described high-low temperature chamber, fix measured piece by measured piece mount pad;
Described support bar lower end is smooth sphere, described high-low temperature chamber top is provided with through hole, described support bar vertically acts on measured piece through the through hole at high-low temperature chamber top, described three-dimensional mobile platform is positioned at the top of high-low temperature chamber, and described post upper is affixed by power sensor and three-dimensional mobile platform;
Described high-low temperature chamber top and side are provided with view window, and described optical lens is vertically fixed on support bar by mount pad, and described optical lens, just to high-low temperature chamber top view window, has the graticule with the accurate heart of cross in described optical lens;
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 and measured piece mount pad by pyramid reflective mirror mount pad, pyramid reflective mirror on described pyramid reflective mirror mount pad has two and spacing to keep certain, the corresponding pyramid reflective mirror of described each laser head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582845.7U CN203606113U (en) | 2013-09-18 | 2013-09-18 | Device accurately measuring flexural rigidity in high- and low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582845.7U CN203606113U (en) | 2013-09-18 | 2013-09-18 | Device accurately measuring flexural rigidity in high- and low-temperature environment |
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| Publication Number | Publication Date |
|---|---|
| CN203606113U true CN203606113U (en) | 2014-05-21 |
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| CN201320582845.7U Withdrawn - After Issue CN203606113U (en) | 2013-09-18 | 2013-09-18 | Device accurately measuring flexural rigidity in high- and low-temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471834A (en) * | 2013-09-18 | 2013-12-25 | 浙江工商大学 | Device for accurately measuring bending rigidity in high-and-low temperature environment |
| 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 |
-
2013
- 2013-09-18 CN CN201320582845.7U patent/CN203606113U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471834A (en) * | 2013-09-18 | 2013-12-25 | 浙江工商大学 | Device for accurately measuring bending rigidity in high-and-low temperature environment |
| CN103471834B (en) * | 2013-09-18 | 2016-04-06 | 浙江工商大学 | The device of curved rigidity is accurately measured under high and low temperature environment |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140521 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |