CN104930974B - A kind of displacement meter moving displacement without fixed directly measurement measuring point - Google Patents
A kind of displacement meter moving displacement without fixed directly measurement measuring point Download PDFInfo
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- CN104930974B CN104930974B CN201510328461.6A CN201510328461A CN104930974B CN 104930974 B CN104930974 B CN 104930974B CN 201510328461 A CN201510328461 A CN 201510328461A CN 104930974 B CN104930974 B CN 104930974B
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- displacement meter
- displacement
- guide rod
- sleeve
- pedestal
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of without the fixed displacement meter for directly measuring measuring point and moving displacement, including：Mass block, spring, damper, displacement meter shell, sleeve, torsionspring, guide rod, laser probe, displacement meter pedestal and testee；Displacement meter pedestal is fixed below displacement meter shell；Guide rod or so is opposite to be respectively provided with one, and is pierced by displacement meter shell；Mass block is connected by spring and damper with displacement meter shell upper end；Guide rod is connected by torsionspring with sleeve, sleeve is equipped at displacement meter cage connection with displacement meter housing hinge simultaneously；Laser probe face mass block is simultaneously fixed on displacement meter pedestal.Displacement meter provided by the invention does not need permanent datum；It can be directly mounted on testee；It is small by external interference factor.
Description
Technical field
The invention belongs to displacement meter fields, and in particular to a kind of without the fixed displacement meter for directly measuring measuring point and moving displacement.
Background technology
Vibration displacement test is that the Engineering Vibrations problems such as building, machinery, aviation boat need the key content solved.Sensor
Design be that there are many current displacement meter product, have laser displacement gauge, electromagnetic eddy displacement meter, Optical Fiber Grating Displacement Meter etc., but
The displacement of all engineer applications must be there are one fixed reference point when measuring displacement.In Practical Project, provide
These fixed points are very difficult.Many researchers are dedicated to designing a kind of can be placed on testee as accelerometer
The sensor of upper energy output displacement, the prior art have laser displacement gauge, current vortex displacement meter, Optical Fiber Grating Displacement Meter.But
When displacement meter measures testee vibration displacement in current all engineerings, be both needed to there are one with the completely self-contained fixation of testee
Point；Output data is larger by displacement meter installation point and reference point locations disturbing factor；The used displacement meter volume of seismological bureau is huge
Greatly, it cannot promote and apply.
Invention content
An object of the present invention is above-mentioned to solve the problems, such as, provides one kind and not needing permanent datum, can directly be pacified
The displacement meter that displacement is moved without fixed directly measurement measuring point loaded on testee.
The present invention provides a kind of displacement meter moving displacement without fixed directly measurement measuring point, including：Mass block, spring, resistance
Buddhist nun's device, displacement meter shell, sleeve, torsionspring, guide rod, laser probe and displacement meter pedestal；The displacement meter pedestal is fixed on
Below the displacement meter shell；Described guide rod or so is opposite to be respectively provided with one, and is pierced by the displacement meter shell；The mass block
It is connected with displacement meter shell upper end by spring and damper；Sleeve is equipped at the guide rod and displacement meter cage connection,
The sleeve is connected by the torsionspring simultaneously with displacement meter housing hinge；Mass block described in the laser probe face is simultaneously solid
It is scheduled on the displacement meter pedestal.
The beneficial effects of the present invention are provided by the invention a kind of without the fixed displacement for directly measuring measuring point and moving displacement
Meter mainly designs a kind of quasi- spring mass system of the low intrinsic frequency of low additional mass using constant variable system building method, with this
Based on design directly output measuring point displacement displacement meter, do not need permanent datum；It can be directly mounted on testee；
It is small by external interference factor.
Description of the drawings
It is a kind of without the fixed structure chart for directly measuring measuring point and moving the displacement meter of displacement that Fig. 1 show the present invention.
Specific implementation mode
The specific embodiment of the invention is described in detail below in conjunction with specific attached drawing.It should be noted that in following embodiments
The combination of the technical characteristic or technical characteristic of description is not construed as isolated, they can be combined with each other to reach
To superior technique effect.
As shown in Figure 1, the present invention provides a kind of displacement meter moving displacement without fixed directly measurement measuring point, including：Quality
Block 1, spring 2, damper 3, displacement meter shell 4, sleeve 5, torsionspring 6, guide rod 7, laser probe 8 and displacement meter pedestal 9；Position
It moves meter pedestal 9 and is fixed on 4 lower section of displacement meter shell；Guide rod 7 or so is opposite to be respectively provided with one, and is pierced by displacement meter shell 4；Quality
Block 1 is connected by spring 2 and damper 3 with 4 upper end of displacement meter shell；Guide rod 7 is equipped with sleeve 5 with 4 junction of displacement meter shell,
Sleeve 5 is hinged with displacement meter shell 4 to be connected by torsionspring 6 simultaneously；8 face mass block 1 of laser probe is simultaneously fixed on displacement meter
On pedestal 9.
This displacement meter is placed on testee 10 when use.
Inventive principle：
1 mass of mass block is set as m, 2 spring rate of spring is set as k, and the damping of damper 3 is set as c, and torsionspring 6 reverses
Rigidity is set as G, and the distance between 5 hinge joint of sleeve and mass block 1 are set as L.
When displacement meter is static, guide rod 7 keeps horizontal horizontal position, spring 2 to be maintained at former long status, the weight of mass block 1
Power provides balance by torsionspring 6, if 6 torsional deflection angle of torsionspring is α at this time0, then
MgL/2=G α0 (1)
When 10 vertical motion of testee, it is assumed that the function that vibration displacement changes over time is Y (t)=A sin ω t,
Mass block 1 is y (t) relative to the vertical displacement of testee 10, then obtains the equation of motion to 1 stress analysis of mass block
Wherein tg α=y/L, it is clear that α maximum occurrences are no more than pi/2, when design torsionspring 6 makes G very littles, α0>>Pi/2,
Then combine (1) formula, (2) formula that can be reduced to
Above formula steady state solution
Y (t)=B sin (ω t- θ)
WhenB ≈ A have laser probe 8 to measure the displacement of the displacement and testee 10 of mass block 1 at this time
It is equal.Theory shows ξ=0.6~0.7, γ>2.5 can reach effect.
Therefore, above-mentioned key point is to need displacement intrinsic frequency very low, i.e., 1 mass of mass block is very big or 2 rigidity of spring
K very littles.But if if not eliminating gravity using torsionspring 6, guide rod 7,5 mechanism of sleeve according to the present invention, either adopt
Still reduce rigidity with quality is tuned up, is required to larger Static Correction space.The key point of the present invention is just a cancellation dead weight production
The influence of raw Static Correction so that k rigidity and m Quality Designs are flexible, can need to design according to range.
A kind of displacement meter moving displacement without fixed directly measurement measuring point provided by the invention mainly utilizes constant variable system structure
The method of making designs a kind of quasi- spring mass system of the low intrinsic frequency of low additional mass, designs direct output based on this
The displacement meter of measuring point displacement, does not need permanent datum；It can be directly mounted on testee；It is small by external interference factor.
Although having been presented for some embodiments of the present invention herein, it will be appreciated by those of skill in the art that
Without departing from the spirit of the invention, the embodiments herein can be changed.Above-described embodiment is only exemplary, no
It should be using the embodiments herein as the restriction of interest field of the present invention.
Claims (1)
1. a kind of directly measuring the displacement meter that measuring point moves displacement without permanent datum, which is characterized in that including：Mass block, bullet
Spring, damper, displacement meter shell, sleeve, torsionspring, guide rod, laser probe and displacement meter pedestal；The displacement meter pedestal is solid
It is connected in below the displacement meter shell；Described guide rod or so is opposite to be respectively provided with one, and is pierced by the displacement meter shell；The matter
Gauge block is connected by spring and damper with displacement meter shell upper end；Set is equipped at the guide rod and displacement meter cage connection
Cylinder, the sleeve are connected by the torsionspring simultaneously with displacement meter housing hinge；The laser probe face mass block is simultaneously solid
It is scheduled on the displacement meter pedestal；When the displacement meter is static, guide rod keeps horizontal position, spring to keep former long status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510328461.6A CN104930974B (en) | 2015-06-15 | 2015-06-15 | A kind of displacement meter moving displacement without fixed directly measurement measuring point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510328461.6A CN104930974B (en) | 2015-06-15 | 2015-06-15 | A kind of displacement meter moving displacement without fixed directly measurement measuring point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104930974A CN104930974A (en) | 2015-09-23 |
| CN104930974B true CN104930974B (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510328461.6A Expired - Fee Related CN104930974B (en) | 2015-06-15 | 2015-06-15 | A kind of displacement meter moving displacement without fixed directly measurement measuring point |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116298A (en) * | 1994-07-30 | 1996-02-07 | 苏立 | Absolute amplitude sensor |
| CN101225865A (en) * | 2007-12-26 | 2008-07-23 | 西安交通大学 | Single-degree-of-freedom ultralow frequency vertical vibration isolation system |
| CN101726382A (en) * | 2009-12-24 | 2010-06-09 | 中国航天科技集团公司第六研究院第十一研究所 | Device for measuring micro-thrust |
| CN102109334A (en) * | 2009-12-25 | 2011-06-29 | 上海微电子装备有限公司 | Absolute displacement measuring device |
| CN203641365U (en) * | 2014-01-07 | 2014-06-11 | 湖南大学 | Quasi zero stiffness vibration isolator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005265132A (en) * | 2004-03-19 | 2005-09-29 | Technology Seed Incubation Co Ltd | Impact vibration absorbing method and vibration damping device |
| JP2011047718A (en) * | 2009-08-25 | 2011-03-10 | Saitama Univ | Mass measuring device |
| CN203615914U (en) * | 2013-12-17 | 2014-05-28 | 湖南科技大学 | Ultra-low frequency displacement meter |
-
2015
- 2015-06-15 CN CN201510328461.6A patent/CN104930974B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116298A (en) * | 1994-07-30 | 1996-02-07 | 苏立 | Absolute amplitude sensor |
| CN101225865A (en) * | 2007-12-26 | 2008-07-23 | 西安交通大学 | Single-degree-of-freedom ultralow frequency vertical vibration isolation system |
| CN101726382A (en) * | 2009-12-24 | 2010-06-09 | 中国航天科技集团公司第六研究院第十一研究所 | Device for measuring micro-thrust |
| CN102109334A (en) * | 2009-12-25 | 2011-06-29 | 上海微电子装备有限公司 | Absolute displacement measuring device |
| CN203641365U (en) * | 2014-01-07 | 2014-06-11 | 湖南大学 | Quasi zero stiffness vibration isolator |
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| Publication number | Publication date |
|---|---|
| CN104930974A (en) | 2015-09-23 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 Termination date: 20190615 |