CN107655821A - Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer - Google Patents
Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer Download PDFInfo
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- CN107655821A CN107655821A CN201711121412.0A CN201711121412A CN107655821A CN 107655821 A CN107655821 A CN 107655821A CN 201711121412 A CN201711121412 A CN 201711121412A CN 107655821 A CN107655821 A CN 107655821A
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- pendulum
- frequency
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- weight
- pendulum bar
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- 238000013016 damping Methods 0.000 title claims abstract description 25
- 229920000742 Cotton Polymers 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
Abstract
The present invention relates to the frequency modulation bascule for changing free damping frequency in a kind of low frequency mechanical spectrometer, includes the vertical pendulum bar and T-shaped support frame that are vertically arranged on the table, the double threaded screw being horizontally set on vertical pendulum bar, the pendulum for being separately positioned on double threaded screw both ends and being connected through a screw thread, the guide roller for being separately positioned on T-shaped support frame upper end both sides, the cotton thread for bypassing two guide rollers successively；One end of the cotton thread is connected with vertical pendulum bar upper end, and the other end is provided with balance weight corresponding with vertical pendulum bar weight；Multiple small balls corresponding with pendulum weight are additionally provided with the balance weight；The present invention is when carrying out the low frequency damping of free damping measurement material, the pendulum to be varied in weight by rotating pendulum change pendulum to vertical pendulum bar distance or replacing can adjust vibration frequency, and can be with vertical pendulum bar and the weight balancing of pendulum by increasing balance weight and small ball, so that sample is not stressed in vertical direction or the effect of stress less, measurement accuracy is improved.
Description
Technical field
The present invention relates to material tests field, the frequency modulation for refering in particular to change in a kind of low frequency mechanical spectrometer free damping frequency is put down
Weigh device.
Background technology
Low frequency mechanoscopy tester is the important instrument of the characteristics such as research material power, electricity, magnetic, can detect the inside of material
Structure, defect and dislocation, study the characteristics of motion of crystal boundary or boundary.
At present, the domestic low frequency mechanoscopy tester used is typically voluntarily developed, as SUZHOU VOCATIONAL UNIVERSITY shows
LMA-1 type low frequency mechanoscopy testers were once have developed in 2004 for Testing Technology Study；The tester is using on vertical pendulum bar
Speculum the vibration of sample is converted into the displacement of parallel hot spot, and pass through the silicon light of two pieces of differential connections on photoelectric transformer
The displacement of hot spot is converted into voltage signal by battery, and data acquisition is carried out by host computer, so as to measure the mechanoscopy of sample.
Material low frequency damping measurement is completed in low frequency mechanical spectrometer, i.e., sample, which is erect, places, and one end is fixed, be another
End applies the very little shearing stress of a circulation, and stress is removed at once, is then decayed by sample free vibration, measures its decay
Amplitude change with time；Because the damping capacity of free damping measurement material is accurate, therefore, free damping measurement material
Damping capacity is widely adopted always, but vibration frequency is in the structure of vertical pendulum bar, material and size and specimen material and size
It cannot be changed after it is determined that, cause free damping method to have significant limitation in use, and sample is when measuring,
It is required that sample is not stressed in vertical direction or the effect of stress less, measurement accuracy otherwise can be influenceed.
The content of the invention
There is provided to change in a kind of low frequency mechanical spectrometer the invention aims to overcome the deficiencies in the prior art and freely decline
Subtract the frequency modulation bascule of frequency, when carrying out the low frequency damping of free damping measurement material, vibration frequency can be adjusted, and can make
Sample is not stressed in vertical direction or the effect of stress less, improves measurement accuracy, and simple in construction, easy to use.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：Change free damping in a kind of low frequency mechanical spectrometer
The frequency modulation bascule of frequency, include the vertical pendulum bar being movably arranged on vertically on workbench, pair being horizontally set on vertical pendulum bar
Head screw rod, the pendulum for being separately positioned on double threaded screw both ends and being connected through a screw thread, set T-shaped support frame on the table,
It is separately positioned on the guide roller of T-shaped support frame upper end both sides, successively around the cotton thread of two guide rollers；One end of the cotton thread with
Vertical pendulum bar upper end connects, and the other end is provided with balance weight corresponding with vertical pendulum bar weight；It is additionally provided with the balance weight multiple
Small ball corresponding with pendulum weight.
Preferably, the vertical pendulum bar include made of aluminium alloy or titanium alloy material epimere, by tungsten-molybdenum alloy material system
Into stage casing and for fix sample epimere upper fixture form；The double threaded screw is arranged on epimere, and is placed in workbench
Top.
Preferably, the pendulum is provided with multigroup, and the weight of multigroup pendulum gradually increases.
Preferably, the both ends of the cotton thread are connected by pressure-pad with vertical pendulum bar and balance weight respectively.
Due to the utilization of above-mentioned technical proposal, the present invention has following advantages compared with prior art：
The frequency modulation bascule for changing free damping frequency in low frequency mechanical spectrometer of the present invention freely decline
When subtracting the low frequency damping of measurement material, by rotating pendulum change pendulum to vertical pendulum bar distance or changing the pendulum to vary in weight
Can adjust vibration frequency, and by increase balance weight and small ball can with vertical pendulum bar and the weight balancing of pendulum so that sample
Do not stressed or the effect of few stress in vertical direction, improve measurement accuracy.
Brief description of the drawings
Technical solution of the present invention is described further below in conjunction with the accompanying drawings：
Accompanying drawing 1 is the structure for the frequency modulation bascule for changing free damping frequency in low frequency mechanical spectrometer of the present invention
Schematic diagram.
Wherein：1st, workbench；2nd, balance weight；3rd, small ball；4th, guide roller；5th, cotton thread；6th, T-shaped support frame；7th, double end spiral shell
Bar；8th, pendulum；9th, epimere；10th, magnet steel；11st, speculum；12nd, stage casing；13rd, upper fixture.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Accompanying drawing 1 is the frequency modulation bascule for changing free damping frequency in low frequency mechanical spectrometer of the present invention, comprising
The vertical vertical pendulum bar being movably arranged on workbench 1, the double threaded screw 7 being horizontally set on vertical pendulum bar, it is separately positioned on double end
The both ends of screw rod 7 and be connected through a screw thread pendulum 8, be arranged on workbench 1 T-shaped support frame 6, be separately positioned on T-shaped support
The guide roller 4 of the upper end both sides of frame 6, the cotton thread 5 for bypassing two guide rollers 4 successively；One end of the cotton thread 5 connects with vertical pendulum bar upper end
Connect, the other end is provided with balance weight 2 corresponding with vertical pendulum bar weight；The multiple and weight of pendulum 8 is additionally provided with the balance weight 2
Corresponding small ball 3；During use：Speculum 11 and generation very little made of amorphous glass material can be also installed on vertical pendulum bar to cut
The magnet steel 10 of stress, the rotary inertia for changing pendulum 8 by rotating pendulum 8 and arriving vertical pendulum bar distance, i.e. change vertical pendulum bar, can small model
Interior regulation vibration frequency is enclosed, when distance is more remote, vibration frequency is smaller, and when distance is nearer, vibration frequency is bigger, and passes through increasing
Add balance weight 2 and small ball 3 with vertical pendulum bar and the weight balancing of pendulum 8 sample can be made not stressed or few stress in vertical direction
Effect.
Further, the vertical pendulum bar include made of aluminium alloy or titanium alloy material epimere 9, by tungsten-molybdenum alloy material system
Into stage casing 12 and the upper fixture 13 for fixing sample epimere 9 form, wherein because aluminium alloy or titanium alloy material are light,
The overall weight of vertical pendulum bar can be reduced, and tungsten-molybdenum alloy material system is more heat-resisting, ensures to deform under 400 degree of high temperature；Institute
State double threaded screw 7 and be arranged on epimere 9, and be placed in the top of workbench 1.
Further, the pendulum 8 is provided with multigroup, and the weight of multigroup pendulum 8 gradually increases, and is varied in weight by changing
Pendulum 8 can adjust vibration frequency on a large scale, such as reduce frequency, using larger pendulum 8, increase frequency, using less pendulum
Hammer 8.
Further, the both ends of the cotton thread 5 are connected by pressure-pad with vertical pendulum bar and balance weight 2 respectively, not only facilitate installation,
And can guarantee that the axis of cotton thread 5 and vertical pendulum bar and balance weight 2 is concentric, improve the degree of balance.
Due to the utilization of above-mentioned technical proposal, the present invention has following advantages compared with prior art：
The frequency modulation bascule for changing free damping frequency in low frequency mechanical spectrometer of the present invention freely decline
When subtracting the low frequency damping of measurement material, by rotating pendulum change pendulum to vertical pendulum bar distance or changing the pendulum to vary in weight
Can adjust vibration frequency, and by increase balance weight and small ball can with vertical pendulum bar and the weight balancing of pendulum so that sample
Do not stressed or the effect of few stress in vertical direction, improve measurement accuracy.
It the above is only the concrete application example of the present invention, protection scope of the present invention be not limited in any way.All uses
Equivalent transformation or equivalent replacement and the technical scheme formed, all fall within rights protection scope of the present invention.
Claims (4)
1. change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer, it is characterised in that：Comprising vertical living
The dynamic vertical pendulum bar set on the table, the double threaded screw being horizontally set on vertical pendulum bar, it is separately positioned on double threaded screw both ends
And be connected through a screw thread pendulum, T-shaped support frame on the table is set, is separately positioned on T-shaped support frame upper end both sides
Guide roller, the cotton thread for bypassing two guide rollers successively；One end of the cotton thread is connected with vertical pendulum bar upper end, the other end be provided with
Balance weight corresponding to vertical pendulum bar weight；Multiple small balls corresponding with pendulum weight are additionally provided with the balance weight.
2. change the frequency modulation bascule of free damping frequency, its feature in low frequency mechanical spectrometer according to claim 1
It is：The vertical pendulum bar include made of aluminium alloy or titanium alloy material epimere, made of tungsten-molybdenum alloy material stage casing, with
And the upper fixture for fixing sample epimere forms；The double threaded screw is arranged on epimere, and is placed in above workbench.
3. changing the frequency modulation bascule of free damping frequency in low frequency mechanical spectrometer according to claim 1 or 2, it is special
Sign is：The pendulum is provided with multigroup, and the weight of multigroup pendulum gradually increases.
4. change the frequency modulation bascule of free damping frequency, its feature in low frequency mechanical spectrometer according to claim 3
It is：The both ends of the cotton thread are connected by pressure-pad with vertical pendulum bar and balance weight respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711121412.0A CN107655821A (en) | 2017-11-14 | 2017-11-14 | Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711121412.0A CN107655821A (en) | 2017-11-14 | 2017-11-14 | Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107655821A true CN107655821A (en) | 2018-02-02 |
Family
ID=61121071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711121412.0A Pending CN107655821A (en) | 2017-11-14 | 2017-11-14 | Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107655821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518563A (en) * | 2018-06-13 | 2018-09-11 | 华东交通大学 | Low frequency mechanical spectrometer sample holder measures adjusting apparatus and method |
| CN116519261A (en) * | 2023-04-25 | 2023-08-01 | 大连理工大学 | Floating type offshore platform free decay test device, method and application |
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| US8168120B1 (en) * | 2007-03-06 | 2012-05-01 | The Research Foundation Of State University Of New York | Reliable switch that is triggered by the detection of a specific gas or substance |
| CN103233952A (en) * | 2013-04-17 | 2013-08-07 | 苏州市职业大学 | Vertical swing-rod holding device applicable to low-frequency internal-friction measurements |
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| CN204556212U (en) * | 2015-04-08 | 2015-08-12 | 东北大学 | A kind of sheet metal tack-weld impact property proving installation |
| CN106461377A (en) * | 2014-04-07 | 2017-02-22 | 诺威量测设备股份有限公司 | Optical phase measurement method and system |
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-
2017
- 2017-11-14 CN CN201711121412.0A patent/CN107655821A/en active Pending
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| CN1788216A (en) * | 2003-05-16 | 2006-06-14 | 波克股份有限公司 | NMR measuring system for weight and humidity of powders |
| WO2005047813A1 (en) * | 2003-10-27 | 2005-05-26 | The General Hospital Corporation | Method and apparatus for performing optical imaging using frequency-domain interferometry |
| US8168120B1 (en) * | 2007-03-06 | 2012-05-01 | The Research Foundation Of State University Of New York | Reliable switch that is triggered by the detection of a specific gas or substance |
| CN103233952A (en) * | 2013-04-17 | 2013-08-07 | 苏州市职业大学 | Vertical swing-rod holding device applicable to low-frequency internal-friction measurements |
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| WO2015108969A1 (en) * | 2014-01-14 | 2015-07-23 | 908 Devices Inc. | Sample collection in compact mass spectrometry systems |
| CN106461377A (en) * | 2014-04-07 | 2017-02-22 | 诺威量测设备股份有限公司 | Optical phase measurement method and system |
| CN104614311A (en) * | 2015-01-13 | 2015-05-13 | 苏州市职业大学 | Torsional mechanism suitable for low-frequency mechanical spectrum meter and used for adjusting position of sample |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518563A (en) * | 2018-06-13 | 2018-09-11 | 华东交通大学 | Low frequency mechanical spectrometer sample holder measures adjusting apparatus and method |
| CN116519261A (en) * | 2023-04-25 | 2023-08-01 | 大连理工大学 | Floating type offshore platform free decay test device, method and application |
| CN116519261B (en) * | 2023-04-25 | 2023-10-20 | 大连理工大学 | Floating type offshore platform free decay test device, method and application |
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