CN109374241A - A kind of measuring device of flexible hinge Static stiffness - Google Patents
A kind of measuring device of flexible hinge Static stiffness Download PDFInfo
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- CN109374241A CN109374241A CN201811269354.0A CN201811269354A CN109374241A CN 109374241 A CN109374241 A CN 109374241A CN 201811269354 A CN201811269354 A CN 201811269354A CN 109374241 A CN109374241 A CN 109374241A
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- flexible hinge
- measuring device
- pedestal
- component
- support plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
- G01M5/0058—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems of elongated objects, e.g. pipes, masts, towers or railways
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of measuring devices of flexible hinge Static stiffness, including flexible hinge to be measured, measuring device is installed on optical platform, measuring device includes fixation kit, power component, carrier bar, deformation measurement component, data acquisition device, support plate and pad component, fixation kit includes pedestal and a pair of of pressing plate, pedestal is set to the middle part of optical platform, is made of rectangular boss and rectangular blade；In the rectangular straight slot of the fixing end insertion rectangular boss of flexible hinge to be measured；A pair of of pressing plate is pressed on pedestal supporting plate；In the rectangular straight slot of the free end insertion carrier bar of flexible hinge to be measured；Support plate and pad component are located at the two sides of pedestal, and support plate is L-shaped, and the transverse slat of support plate is connect with optical platform, and the vertical plate and pad component of support plate are used to attachment force component；Power component includes L-type fixator, differential head, pressure sensor and pressure sensor tooling；Deformation measurement component includes laser displacement sensor and fine tuning universal magnetic gauge stand.
Description
Technical field
The invention belongs to spring rates of flexure hinges measuring device technical fields, and in particular to a kind of survey of flexible hinge Static stiffness
Measure device.
Background technique
Flexible hinge as special compliant mechanism a kind of in mechanical engineering technical field, have it is small in size, rub without machinery
It wipes, be not necessarily to the advantages that lubrication, gapless, low temperature sensibility, long-life and high sensitivity, in micromotion platform, fast anti-mirror, microcomputer
Electric system (MEMS), the fields such as the high-precision such as sensor, high-resolution are widely used.
Flexible hinge follows small deformation hypothesis, it is assumed that and flexible hinge one end is relatively fixed end, and the other end is free end,
The measuring principle of Static stiffness is Hooke's law.The Static stiffness K of flexible hinge is equal to the load L that its free end carries, and (power turns
Square) ratio with deflection δ (line deformation or angular deformation).
The problem of flexible hinge Static stiffness is tested can be converted into the application of flexible hinge load and measurement and free end become
The problem of shape measurement.At present it is relatively conventional measurement flexible hinge Static stiffness method be using counterweight as force application mechanism, but
The power that this kind of mode obtains is discontinuous, the Static stiffness poor accuracy acquired.Although there are also high-precision measurement methods, such as
Linear motor pushes, but such device has the problems such as excessively cumbersome, higher cost.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of measurement dress of flexible hinge Static stiffness
It sets, is the biography of flexible hinge for verifying the accuracy of flexible hinge Static stiffness economics analysis model and FEM Numerical Simulation
Dynamic performance provides quantitative basis.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of measuring device of flexible hinge Static stiffness, including flexible hinge to be measured, the measuring device are installed on optics
On platform, measuring device include fixation kit, power component, carrier bar, deformation measurement component, data acquisition device, support plate and
Pad component, the fixation kit include pedestal and a pair of of pressing plate, and the pedestal, which is connected through a screw thread, is set to optical platform
Middle part, the pedestal are made of rectangular boss and rectangular blade；Rectangular straight slot, flexibility to be measured are provided at the rectangular boss center
The fixing end of hinge is embedded in the rectangular straight slot of the rectangular boss；The pair of pressing plate is pressed on the pedestal supporting plate and passes through
Bolt is fixed；Rectangular straight slot is provided at the center of the carrier bar lower surface, the free end of flexible hinge to be measured is embedded in the carrying
In the rectangular straight slot of bar；The support plate and pad component are located at the two sides of pedestal, and the support plate is L-shaped, support plate
Transverse slat connect with optical platform, the vertical plate and pad component of support plate are used to attachment force component；
The power component includes L-type fixator, differential head, pressure sensor and pressure sensor tooling, and the L-type is fixed
The transverse arm of device and the vertical plate of support plate or pad component connect, and the armstand of L-type fixator is connected with the differential head, the pressure
The shape of sensor is L-shaped, connect at the top of the transverse arm of pressure sensor tooling and the armstand of L-type fixator, the pressure sensing
Stepped hole is provided in the armstand of device tooling, the pressure sensor is embedded in the stepped hole；
The deformation measurement component includes laser displacement sensor and fine tuning universal magnetic gauge stand；The fine tuning universal magnetic
Gauge stand is made of magnetic stand and gimbals, and the magnetic stand is by magnetic-adsorption on optical platform；The laser position
Displacement sensor is connect by bolt with the gimbals, and the data acquisition device is set on optical platform and swashs with described
Optical displacement sensor electrical connection.
Further, it is clearance fit between flexible hinge to be measured and rectangular straight slot, and is glued by epoxide-resin glue
It is fixed.
It further, is clearance fit between the pressure sensor and the stepped hole.
Further, the carrier bar is rectangular section stock.
Further, the pad component is made of the I-shaped cushion block of different-thickness, the upper end of the I-shaped cushion block
It is provided with threaded hole, the lower end of the I-shaped cushion block is provided with U-shaped hole；It is connected through a screw thread between adjacent I-shaped cushion block.
Further, the upper end of the I-shaped cushion block of the top and the L-type fixator transverse arm spiral shell in the pad component
Line connection；The lower end of the I-shaped cushion block of the lowermost is threadedly coupled with the optical platform in the pad component.
Further, threaded hole, single test are had at the rectangular straight slot center of the carrier bar and the pedestal
Flexible hinge can be resisted by being screwed into screw after the completion, make to separate between flexible hinge, pedestal and carrier bar, realized and repeat benefit
With.
Further, the differential head is made of measuring staff, thread segment, gentle breeze cylinder and the fine tuning button set gradually.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) present invention mainly cooperates carrier bar as force application mechanism by differential head, and is passed by pressure sensor and pressure
Loading force suffered by the force measuring machine real-time measurement flexible hinge free end to be measured that sensor tooling is constituted, while being passed based on laser displacement
The deflection of the deformation measurement component real-time measurement flexible hinge free end to be measured of sensor, it is contemplated that flexible hinge follows small deformation
It is assumed that can use the Static stiffness that Hooke's law acquires the flexible hinge.
(2) present apparatus structure is simple, by the cooperation of high-precision pressure sensor and high precision laser displacement sensor, takes
Build low cost, high-precision flexible hinge Static stiffness parameter test device；
(3) present apparatus is capable of providing the power load of consecutive variations using differential head as force component；
(4) it can adapt to the measurement of different size flexible hinge Static stiffness.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flexible hinge Static stiffness measuring device of the present invention.
Fig. 2 is differential header structure schematic diagram in the present invention.
Appended drawing reference: 1- support plate；2-L type fixator；3- differential head；4- pressure sensor tooling；5- pressure sensor；
6- laser displacement sensor；7- finely tunes universal magnetic gauge stand；8- carrier bar；9- flexible hinge to be measured；10- a pair of pressing plate；The bottom 11-
Seat；12- pad component；13- power component；14- optical platform；301- measuring staff；302- thread segment；303- gentle breeze cylinder；304- fine tuning
Button
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
As depicted in figs. 1 and 2, the present invention relates to a kind of measuring device of flexible hinge Static stiffness, measuring device is mounted on
On optical platform 14, measuring device includes fixation kit, power component 13, carrier bar 8, deformation measurement component, support plate 1 and cushion block
Component 12, wherein fixing end of the fixation kit to fixation flexible hinge 9 to be measured, support and fixation of the support plate 1 to part,
Power component 13 is made of force component and dynamometry component, and exert a force power load of the component to apply consecutive variations, and dynamometry component is used
To measure the power load that force component is applied to flexible hinge to be measured, power output of the carrier bar 8 to bear force application mechanism, and incite somebody to action
The power passes to the free end of flexible hinge to be measured, and deformation measurement component is to measure change of the hinge to be measured under specific load
Shape, to make measuring device can adapt to various sizes of flexible hinge, each component is specifically described as follows pad component 12:
Fixation kit includes pedestal 11 and a pair of of pressing plate 10.Pedestal 11 is threadedly coupled with optical platform 14；Pedestal 11 is by square
Shape boss and rectangular blade are constituted；Rectangular boss is provided with rectangular straight slot at center；A pair of of pressing plate is pressed on pedestal supporting plate, and with bottom
Seat is threadedly coupled；The relatively fixed end of flexible hinge to be measured is embedded in the rectangular straight slot of rectangular boss, between the two clearance fit, and passes through
Epoxide-resin glue, which is glued, to be fixed.
1 shape of support plate is L-shaped.1 transverse slat of support plate is threadedly coupled with optical platform 14, is provided with spiral shell on 1 vertical plate of support plate
Pit.
The component that exerts a force includes L-type fixator 2 and differential head 3, the form and branch that 2 transverse arm of L-type fixator is connected through a screw thread
1 vertical plate of fagging is affixed；Threaded hole is provided in 2 armstand of L-type fixator；Differential head 3 is threaded into hole, and uses nut check；L-type is solid
Determine to be provided with threaded hole at the top of device 2.
Dynamometry component includes pressure sensor 5 and pressure sensor tooling 4.5 tooling shape of pressure sensor is L-shaped, pressure
4 transverse arm of force snesor tooling is provided with through-hole in 2 screw top hole corresponding position of L-type fixator, is threadedly coupled between the two；Pressure
Stepped hole is provided in 4 armstand of sensor tooling；Pressure sensor 5 is embedded in stepped hole, between the two clearance fit.
Carrier bar 8 is rectangular section stock；Carrier bar is provided with rectangular straight slot at 8 lower surface center；Flexible hinge 9 to be measured is certainly
It is embedded in the rectangular straight slot of carrier bar 8 by end, between the two clearance fit, and passes through epoxide-resin glue and be glued fixation.Carrier bar 8 and bottom
Threaded hole is had at the rectangular straight slot center of seat 11.The advantage of threaded hole is: can use spiral shell after the completion of single test
Nail separation flexible hinge, pedestal and carrier bar, convenient for the reuse of workpiece.
Deformation measurement component is made of laser displacement sensor 6 and fine tuning universal magnetic gauge stand 7.Finely tune universal magnetic gauge stand
7 magnetic stand is by magnetic-adsorption on optical platform 14.Laser displacement sensor 6, which is bolted, is fixed on fine tuning ten thousand
To on the gimbals of magnetic stand 7, high-precision, non-contact survey are carried out to the deflection to 9 free end of flexible hinge to be measured
Amount.
Pad component 12 is made of the I-shaped cushion block of muti-piece different-thickness.I-shaped cushion block upper end is provided with threaded hole, work
Font cushion block lower end is provided with U-shaped hole；The form being connected through a screw thread between adjacent I-shaped cushion block is fixedly connected.This kind setting
Benefit is the case where avoiding screw from falling short of when pad thickness is larger.The I-shaped pad of the top in pad component 12
The upper end of block is threadedly coupled with 2 transverse arm of L-type fixator；The lower end of the I-shaped cushion block of the lowermost and optics are flat in pad component 12
Platform 14 is threadedly coupled.
Under acting below in conjunction with attached drawing 1 bending moment load, tangential force load, the survey of flexible hinge Static stiffness of the present invention
Amount process is described in detail.Note: the relationship between the power F applied and moment M can be described with M=F × L, and wherein L is differential
First 3 301 outer end face of measuring staff and carrier bar 8 contact the horizontal distance of central point and 8 center of carrier bar；Flexible hinge 9 to be measured exists
Relationship between the deformation Δ that rotational angle theta under loading force or moment loading and laser displacement sensor 6 measure can be retouched with θ=Δ/l
It states, wherein l is the horizontal distance of 6 center probe of laser displacement sensor and 8 center of carrier bar.
Before installation, the microdrum 303 or fine tuning button 304 of differential head 3 should be adjusted, the measuring staff 301 of differential head 3 is made to be in most short
Length.Measuring device is installed according to summary of the invention later, specifically: firstly, with epoxide-resin glue complete carrier bar 8,
Splicing between pedestal 11 and flexible hinge to be measured 9 is fixed；Then, pedestal 11 is threadedly coupled with optical platform 14, then will be a pair of
Pressing plate 10 is pressed on the supporting plate of pedestal 11, completes the fixation and limit of flexible hinge 9 to be measured.The thread segment 302 of differential head 3 is screwed into
In threaded hole in 2 armstand of L-type fixator.In the stepped hole of 5 embedment pressure sensor tooling 4 of pressure sensor.Pressure sensing
There are certain free gaps between device 5 and the stepped hole of pressure sensor tooling 4.Pressure sensor tooling 4 and L-type fixator 2
It is threadedly coupled.Fine tuning universal magnetic gauge stand 7 is adjusted, laser displacement sensor 6 is made to be vertically installed at the other end of carrier bar 8, it is real
When measure 8 other end of carrier bar deformation.Pressure sensor 5 and laser displacement sensor 6 by the loading force measured and deform number
Data acquisition device is transmitted to according to by data line.
After completing installation process, the microdrum 303 of differential head 3 is adjusted, the outer end face and pressure of the measuring staff 301 of differential head 3 are made
Force snesor 5 is in contact, but does not apply pressure.At this point, enabled pressure sensor 5, laser displacement sensor 6 and data acquisition dress
It sets.Continue the fine tuning button 304 of rotation differential head 3,8 one end of carrier bar rotates after bearing pressure, 6 He of laser displacement sensor
Pressure sensor 5 passes through data line (solid line in Fig. 1) for the load of the deflection Δ of 8 other end of carrier bar measured and application
Power F data are transmitted to data acquisition device, record the data of data acquisition device at this time.Then, continue to rotate the micro- of differential head 3
Tuning knob 304 records the output data of data acquisition device after adjusting fine tuning button 304 every time.The data measured are subjected to minimum two
Multiply straight line fitting, the slope of the straight line of fitting is flexible hinge 9 to be measured in bending moment load MzStatic stiffness under effect.
L-type fixator 2 is separated with support plate 1, then by the upper of L-type fixator 2 and 12 the top cushion block of pad component
End is threadedly coupled, and power component 13 is moved to position shown in Fig. 1 dotted line.The lower end of 12 bottom cushion block of pad component and optical platform
14 are threadedly coupled.Later, dotted line position of the mobile fine tuning universal magnetic gauge stand 7 into Fig. 1 where it, while it is universal to adjust fine tuning
Laser displacement sensor 6 is mounted horizontally to the other end of carrier bar 8 by the gimbals of magnetic stand 7.It repeats to test in upper section
Process, the slope for the straight line that least square fitting obtains at this time are flexible hinges 9 to be measured in tangential force load FyIt is quiet under effect
Rigidity.Pedestal 11 is separated with optical platform 14, is threadedly coupled again with optical platform 14 after pedestal 11 is rotated by 90 °.It repeats
Upper section test process, the slope for the straight line that least square fitting obtains at this time are flexible hinges 9 to be measured in tangential force load FzMake
Static stiffness under.
It repeats to install in upper section and test process, the slope for the straight line that least square fitting obtains at this time is flexible hinge to be measured
Chain 9 is in bending moment load MyStatic stiffness under effect.
The present invention is not limited to embodiments described above.Above the description of specific embodiment is intended to describe and say
Bright technical solution of the present invention, the above mentioned embodiment is only schematical, is not restrictive.This is not being departed from
In the case of invention objective and scope of the claimed protection, those skilled in the art may be used also under the inspiration of the present invention
The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.
Claims (8)
1. a kind of measuring device of flexible hinge Static stiffness, including flexible hinge to be measured, which is characterized in that the measuring device peace
Loaded on optical platform, measuring device include fixation kit, power component, carrier bar, deformation measurement component, data acquisition device,
Support plate and pad component, the fixation kit include pedestal and a pair of of pressing plate, and the pedestal, which is connected through a screw thread, is set to light
The middle part of platform is learned, the pedestal is made of rectangular boss and rectangular blade；It is provided with rectangular straight slot at the rectangular boss center,
The fixing end of flexible hinge to be measured is embedded in the rectangular straight slot of the rectangular boss；The pair of pressing plate is pressed in the pedestal supporting plate
It goes up and is bolted；Rectangular straight slot, the free end insertion of flexible hinge to be measured are provided at the center of the carrier bar lower surface
In the rectangular straight slot of the carrier bar；The support plate and pad component are located at the two sides of pedestal, and the support plate is in L
The transverse slat of type, support plate is connect with optical platform, and the vertical plate and pad component of support plate are used to attachment force component；
The power component includes L-type fixator, differential head, pressure sensor and pressure sensor tooling, the L-type fixator
Transverse arm and the vertical plate or pad component of support plate connect, and the armstand of L-type fixator is connected with the differential head, the pressure sensing
The shape of device is L-shaped, connect at the top of the transverse arm of pressure sensor tooling and the armstand of L-type fixator, the pressure sensor work
Stepped hole is provided in the armstand of dress, the pressure sensor is embedded in the stepped hole；
The deformation measurement component includes laser displacement sensor and fine tuning universal magnetic gauge stand；The fine tuning universal magnetic gauge stand
It is made of magnetic stand and gimbals, the magnetic stand is by magnetic-adsorption on optical platform；The laser displacement passes
Sensor is connect by bolt with the gimbals, the data acquisition device be set on optical platform and with the laser position
Displacement sensor electrical connection.
2. a kind of measuring device of flexible hinge Static stiffness according to claim 1, which is characterized in that flexible hinge to be measured with
It is clearance fit between rectangular straight slot, and is glued by epoxide-resin glue and is fixed.
3. a kind of measuring device of flexible hinge Static stiffness according to claim 1, which is characterized in that the pressure sensor
It is clearance fit between the stepped hole.
4. a kind of measuring device of flexible hinge Static stiffness according to claim 1, which is characterized in that the carrier bar is square
Tee section stock.
5. a kind of measuring device of flexible hinge Static stiffness according to claim 1, which is characterized in that the pad component by
The I-shaped cushion block of different-thickness forms, and the upper end of the I-shaped cushion block is provided with threaded hole, the lower end of the I-shaped cushion block
It is provided with U-shaped hole；It is connected through a screw thread between adjacent I-shaped cushion block.
6. a kind of measuring device of flexible hinge Static stiffness according to claim 5, which is characterized in that in the pad component
The upper end of the I-shaped cushion block of the top is threadedly coupled with the L-type fixator transverse arm；The lowermost work in the pad component
The lower end of font cushion block is threadedly coupled with the optical platform.
7. a kind of measuring device of flexible hinge Static stiffness according to claim 1, which is characterized in that the carrier bar and institute
It states and has threaded hole at the rectangular straight slot center of pedestal, flexible hinge can be resisted by being screwed into screw after the completion of single test
Chain makes to separate between flexible hinge, pedestal and carrier bar, realizes recycling.
8. a kind of measuring device of flexible hinge Static stiffness according to claim 1, which is characterized in that the differential head by according to
Measuring staff, thread segment, gentle breeze cylinder and the fine tuning button composition of secondary setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269354.0A CN109374241A (en) | 2018-10-29 | 2018-10-29 | A kind of measuring device of flexible hinge Static stiffness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269354.0A CN109374241A (en) | 2018-10-29 | 2018-10-29 | A kind of measuring device of flexible hinge Static stiffness |
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| Publication Number | Publication Date |
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| CN109374241A true CN109374241A (en) | 2019-02-22 |
Family
ID=65390261
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811269354.0A Pending CN109374241A (en) | 2018-10-29 | 2018-10-29 | A kind of measuring device of flexible hinge Static stiffness |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095215A (en) * | 2019-05-31 | 2019-08-06 | 华南理工大学 | A kind of submissive hinge stress measurement device |
| CN110108424A (en) * | 2019-05-08 | 2019-08-09 | 中国舰船研究设计中心 | A kind of marine system pipeline support Static stiffness test device and test method |
| CN112051043A (en) * | 2020-08-28 | 2020-12-08 | 江西理工大学 | Fatigue test system for compliant mechanism |
| CN112683517A (en) * | 2021-01-13 | 2021-04-20 | 中南大学 | Testing system for static rigidity of photoelectron packaging flexible parallel platform |
| CN114544167A (en) * | 2021-12-29 | 2022-05-27 | 哈尔滨工业大学 | Flexible hinge bending fatigue life testing device |
| CN117804766A (en) * | 2024-02-28 | 2024-04-02 | 安徽瑞控信光电技术股份有限公司 | Testing device and testing method for flexible supporting structure for quick reflection mirror |
| CN117949155A (en) * | 2024-03-26 | 2024-04-30 | 中国科学院苏州生物医学工程技术研究所 | Flexible hinge rigidity detection method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108424A (en) * | 2019-05-08 | 2019-08-09 | 中国舰船研究设计中心 | A kind of marine system pipeline support Static stiffness test device and test method |
| CN110108424B (en) * | 2019-05-08 | 2021-11-09 | 中国舰船研究设计中心 | Ship system pipeline support static rigidity testing device and testing method |
| CN110095215A (en) * | 2019-05-31 | 2019-08-06 | 华南理工大学 | A kind of submissive hinge stress measurement device |
| CN110095215B (en) * | 2019-05-31 | 2024-05-28 | 华南理工大学 | Flexible hinge stress measuring device |
| CN112051043A (en) * | 2020-08-28 | 2020-12-08 | 江西理工大学 | Fatigue test system for compliant mechanism |
| CN112683517A (en) * | 2021-01-13 | 2021-04-20 | 中南大学 | Testing system for static rigidity of photoelectron packaging flexible parallel platform |
| CN114544167A (en) * | 2021-12-29 | 2022-05-27 | 哈尔滨工业大学 | Flexible hinge bending fatigue life testing device |
| CN114544167B (en) * | 2021-12-29 | 2022-08-05 | 哈尔滨工业大学 | Flexible hinge bending fatigue life testing device |
| CN117804766A (en) * | 2024-02-28 | 2024-04-02 | 安徽瑞控信光电技术股份有限公司 | Testing device and testing method for flexible supporting structure for quick reflection mirror |
| CN117804766B (en) * | 2024-02-28 | 2024-06-04 | 安徽瑞控信光电技术股份有限公司 | Testing device and testing method for flexible supporting structure for quick reflection mirror |
| CN117949155A (en) * | 2024-03-26 | 2024-04-30 | 中国科学院苏州生物医学工程技术研究所 | Flexible hinge rigidity detection method |
| CN117949155B (en) * | 2024-03-26 | 2024-06-07 | 中国科学院苏州生物医学工程技术研究所 | Flexible hinge rigidity detection method |
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Application publication date: 20190222 |
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