CN207215010U - A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation - Google Patents
A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation Download PDFInfo
- Publication number
- CN207215010U CN207215010U CN201721091442.7U CN201721091442U CN207215010U CN 207215010 U CN207215010 U CN 207215010U CN 201721091442 U CN201721091442 U CN 201721091442U CN 207215010 U CN207215010 U CN 207215010U
- Authority
- CN
- China
- Prior art keywords
- cantilever beam
- flexible
- flexible cantilever
- resistance strain
- control card
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses a kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation, including flexible cantilever beam, one end of the flexible cantilever beam is fixed by pedestal, the other end is free end, the front or back installation multi-disc resistance strain gage of the flexible cantilever beam, in the front installation of the another side of the flexible cantilever beam laser displacement sensors for being served only for measuring vibration lateral displacement at resistance strain gage geometric center point more, also include computer, power amplifier, motion control card, vibrator and dynamic strain indicator, use the Strain Distribution and Displacements Distribution graph of a relation that the utility model device can be vibrated with lower mode.
Description
Technical field
It the utility model is related to flexible structure Vibration Analysis Technology field, and in particular to one kind measurement flexible beam oscillation crosswise
Displacement and the device of strain stress relation.
Background technology
The vibration-mode analysis and vibration control method and device comparative maturity of flexible cantilever beam.Prior art is substantially
Based on strain measurement flexible cantilever vibration of beam, analyzed and feedback control；Or based on the acceleration installed on cantilever beam
Sensor measures vibration and feedback control；Transverse vibrational displacement either based on laser displacement sensor measurement flexible beam
Carry out vibration analysis and feedback control.
Prior art is seldom to transverse vibrational displacement of the flexible cantilever beam when lower mode vibrates and point of strain stress relation
Cloth is analyzed and studied.Because the oscillation crosswise and strain stress relation of flexible beam, except the distribution relation of small magnitude linear oscillator
Outside, in addition to excitation amplitude Non-Linear Vibration when lateral displacement and strain distribution relation.The utility model proposes use
The flexible cantilever beam experimental provision of multi-disc resistance strain gage sensor and the multiple laser displacement sensors of distributing installation is pasted in distribution,
By the method for modal excitation vibration analysis, transverse direction of each rank mode of oscillation of low frequency when amplitude and small magnitude vibrate is studied
Displacement and Strain Distribution relation, apparatus and method are provided for the vibration analysis of flexible beam.
Utility model content
In order to overcome shortcoming and deficiency existing for prior art, the utility model provides a kind of measurement flexible beam oscillation crosswise
Displacement and the device of strain stress relation.
The utility model adopts the following technical scheme that：
A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation, including flexible cantilever beam, it is described flexible outstanding
One end of arm beam is fixed by pedestal, and the other end is free end, and the front or back of the flexible cantilever beam installs more sheet resistances
Foil gauge, it is served only for measuring in the front installation of the another side of flexible cantilever beam more and is vibrated at resistance strain gage geometric center point
The laser displacement sensor of lateral displacement；
Also include computer, power amplifier, motion control card, vibrator and dynamic strain indicator, computer export produces
The signal output of flexible cantilever beam low order vibration drives vibrator excitation flexible outstanding to motion control card after power amplifier
Arm beam, the vibration information of multi-disc resistance strain gage detection flexible cantilever beam are defeated after dynamic strain indicator is output to motion control card
Enter to computer, the transverse vibrational displacement information of more laser displacement sensor detection flexible cantilever beam respective points, then pass through
Motion control card is input in computer.
The resistance strain gage is to correspond with laser displacement sensor, and the measurement point of the laser displacement sensor is
The geometric center point of adhering resistance strain sheets.
The multi-disc resistance strain gage and more laser displacement sensors arrange according to yi word pattern.
A kind of method for measuring flexible beam transverse vibrational displacement and strain stress relation, comprises the following steps：
The first step recognizes to obtain the low order vibration modal frequency of the flexible cantilever beam, including the first rank, second-order and the 3rd
Rank；
Second step computer export produces the low order excited vibration signal output motion control card of respective flexible cantilever beam, warp
The vibration for driving vibrator to encourage flexible cantilever beam lower mode after power amplifier is output to after crossing D/A conversions；
The information of the vibration strains of 3rd step resistance strain gage detection is output to motion control card after dynamic strain indicator
Enter computer after carrying out A/D conversions, while more laser displacement sensors are detected to the oscillation crosswise of flexible cantilever beam respective point
Displacement information enters computer after motion control card carries out A/D conversions；
4th step is according to the linear oscillator of the data analysis strain of measurement and the distribution relation of lateral displacement, including small magnitude
With the distribution relation of amplitude Non-Linear Vibration, Strain Distribution and the displacement of the lower mode vibration of flexible cantilever beam system are provided
Distribution relation figure.
The beneficial effects of the utility model：
(1) the multi-disc resistance strain gage that distribution is pasted, small volume, light weight is few with glue, has substantially no effect on flexibility
Vibration of beam characteristic；Laser displacement sensor measurement lateral displacement belongs to non-contact measurement, will not be special to flexible vibration of beam
Property has an impact；
(2) device can be encouraged flexible outstanding by the size of adjusting vibration exciter drive signal amplitude and the frequency of setting
The modal vibration of arm beam difference amplitude, including small magnitude linear oscillator and amplitude Non-Linear Vibration, pass through measuring strain and horizontal stroke
To displacement, the lateral displacement of linear oscillator and Non-Linear Vibration and the distribution relation of strain can be obtained；
(3) it is consistent with the vibration modal frequency of flexible cantilever by setting the exciting signal frequency of vibrator, it is possible to swash
The vibration of corresponding mode is encouraged, so the oscillation crosswise position of the low frequency multiple modal vibrations of flexible cantilever beam can be analyzed using the device
Shifting and strain stress relation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
With reference to embodiment and accompanying drawing, the utility model is described in further detail, but reality of the present utility model
Apply mode not limited to this.
Embodiment
As shown in figure 1, a kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation, including flexible cantilever beam 1,
One end of the flexible cantilever beam is fixed with pedestal, and other end free vibration is free end, the front of the flexible cantilever beam
Or reverse side installation multi-disc resistance strain gage 2, it is served only for measuring resistance strain gage in the another side installation of adhering resistance strain sheets more
The laser displacement sensor 3 of lateral displacement is vibrated at geometric center point, according to the strain signal of measurement and lateral displacement signal, is used
In flexible beam transverse vibrational displacement and Strain Distribution relationship analysis.
Five laser displacement sensors 3 are installed in the front of the another side of flexible cantilever beam in the present embodiment, and interval is equal to be in
Word order, the one side of flexible cantilever beam 1 paste five resistance strain gages, and resistance strain gage and laser displacement sensor are one by one
Corresponding relation.Adjustment installation laser displacement sensor, ensures its measurement distance and measurement point, is pasted for measuring strain piece several
The vibration lateral displacement of what central spot.
Also include computer 8, power amplifier 5, motion control card 7, vibrator 4 and dynamic strain indicator 6, computer export
The signal output for vibrating cantilever beam low order is produced to motion control card, drives vibrator excitation flexible after power amplifier
Cantilever beam, the vibration information of multi-disc resistance strain gage detection flexible cantilever beam is after dynamic strain indicator is output to motion control card
It is input to computer, the transverse vibrational displacement information of more laser displacement sensor detection flexible cantilever beam respective points, Ran Houjing
Motion control card is crossed to be input in computer.
The output of computer 8 produces the signal of flexible cantilever beam low order (such as the first rank, second-order, the 3rd rank etc.) excited vibration
Motion control card 7 is output to, driving vibrator 4 encourages after power amplifier 5 is output to after the D/A conversions of motion control card
The vibration of the lower mode of flexible cantilever beam 1, the information of the vibration strains detected by multi-disc resistance strain gage 2 pass through dynamic strain
It is output to after instrument 6 after motion control card 7 carries out A/D conversions and enters computer 8, while more laser displacement sensors 3 is detected soft
Property beam respective point transverse vibrational displacement information by motion control card 7 carry out A/D conversions after enter computer 8；According to measurement
Data analysis strain and lateral displacement distribution relation, include small magnitude linear oscillator and amplitude Non-Linear Vibration point
Cloth relation；The Strain Distribution and Displacements Distribution graph of a relation of the lower mode vibration of flexible cantilever beam system are provided, to vibrate and dividing
Analysis provides reference.
A kind of method for measuring flexible beam transverse vibrational displacement and strain stress relation, comprises the following steps：
The first step first recognizes to obtain the low order vibration modal frequency of the flexible cantilever beam, such as the first rank, second-order, and the 3rd
The vibration modal frequency of rank etc.；
Second step computer export produces corresponding cantilever beam low order (such as the first rank, second-order, the 3rd rank etc.) excited vibration
The signal output of frequency drives vibrator excitation flexible to motion control card after being output to power amplifier after D/A is changed
The vibration of cantilever beam lower mode；
The information for the vibration strains that 3rd step is detected by multi-disc resistance strain gage is output to fortune after dynamic strain indicator
Dynamic control card enters computer after carrying out A/D conversions, while more laser displacement sensors are detected to the transverse direction of flexible beam respective point
Vibration displacement information enters computer after space A/D conversions；
4th step is shaken according to the data analysis strain of measurement and the distribution relation of lateral displacement, including the linear of small magnitude
Dynamic and amplitude Non-Linear Vibration distribution relation；Provide Strain Distribution and the position of the lower mode vibration of flexible cantilever beam system
Move distribution relation figure.
Above-described embodiment is the preferable embodiment of the utility model, but embodiment of the present utility model is not by described
The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace
Generation, combination, simplify, should be equivalent substitute mode, be included within the scope of protection of the utility model.
Claims (3)
1. a kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation, it is characterised in that including flexible cantilever beam, institute
The one end for stating flexible cantilever beam is fixed by pedestal, and the other end is free end, the front or back installation of the flexible cantilever beam
Multi-disc resistance strain gage, it is served only for measuring resistance strain gage geometric center in the front installation of the another side of flexible cantilever beam more
The laser displacement sensor of lateral displacement is vibrated at point；
Also include computer, power amplifier, motion control card, vibrator and dynamic strain indicator, computer export produces flexible
The signal output of cantilever beam low order vibration drives vibrator excitation flexible cantilever to motion control card after power amplifier
Beam, the vibration information of multi-disc resistance strain gage detection flexible cantilever beam input after dynamic strain indicator is output to motion control card
To computer, the transverse vibrational displacement information of more laser displacement sensor detection flexible cantilever beam respective points, then by fortune
Dynamic control card is input in computer.
2. device according to claim 1, it is characterised in that the resistance strain gage and laser displacement sensor are one by one
Corresponding, the measurement point of the laser displacement sensor is the geometric center point of adhering resistance strain sheets.
3. device according to claim 1, it is characterised in that the multi-disc resistance strain gage and more laser displacement sensings
Device arranges according to yi word pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091442.7U CN207215010U (en) | 2017-08-29 | 2017-08-29 | A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091442.7U CN207215010U (en) | 2017-08-29 | 2017-08-29 | A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207215010U true CN207215010U (en) | 2018-04-10 |
Family
ID=61825529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721091442.7U Expired - Fee Related CN207215010U (en) | 2017-08-29 | 2017-08-29 | A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207215010U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345786A (en) * | 2017-08-29 | 2017-11-14 | 华南理工大学 | A kind of device and method for measuring flexible beam transverse vibrational displacement and strain stress relation |
| CN110631526A (en) * | 2019-10-17 | 2019-12-31 | 青海民族大学 | Measurement system for ancient building colored drawing roof beam displacement |
| CN111681506A (en) * | 2020-06-30 | 2020-09-18 | 湖南城市学院 | Cantilever steel beam dynamic characteristic student test system and method |
-
2017
- 2017-08-29 CN CN201721091442.7U patent/CN207215010U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345786A (en) * | 2017-08-29 | 2017-11-14 | 华南理工大学 | A kind of device and method for measuring flexible beam transverse vibrational displacement and strain stress relation |
| CN110631526A (en) * | 2019-10-17 | 2019-12-31 | 青海民族大学 | Measurement system for ancient building colored drawing roof beam displacement |
| CN110631526B (en) * | 2019-10-17 | 2021-03-05 | 青海民族大学 | Measurement system for ancient building colored drawing roof beam displacement |
| CN111681506A (en) * | 2020-06-30 | 2020-09-18 | 湖南城市学院 | Cantilever steel beam dynamic characteristic student test system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107345786A (en) | A kind of device and method for measuring flexible beam transverse vibrational displacement and strain stress relation | |
| CN102221401B (en) | Vibration test stand and testing method for vibration sensor | |
| CN207215010U (en) | A kind of device for measuring flexible beam transverse vibrational displacement and strain stress relation | |
| Pistrol et al. | Continuous compaction control (CCC) with oscillating rollers | |
| CN104428733B (en) | Time-reversal tactile stimulation interface | |
| CN104776963A (en) | Acoustic excitation non-contact modal testing system and method | |
| CN103344423A (en) | Micro-vibration vibration isolator damping parameter and rigidity parameter measuring device | |
| CN204031455U (en) | A kind of laser vibrating diaphragm FO tester | |
| Erdmann et al. | Numerical simulation of dynamic soil compaction with vibratory compaction equipment | |
| CN103364160A (en) | Device and method for measuring mechanical impedance of harness frame | |
| CN102680270A (en) | Indirect measurement method for ship excitation load caused by equipment under combined effect of unbalanced excitation force and unbalanced bending moment | |
| CN203069261U (en) | Modal test system based on single-point laser continuous plane scanning vibration measurement | |
| CN110849314B (en) | Dynamic strain calibration method with continuously adjustable frequency | |
| CN105651473A (en) | Method for automatic determination of dynamic stiffness of object | |
| CN102680214B (en) | Vibration isolation performance test device and method for corrugated pipe | |
| CN104155072A (en) | Lifting cutter vibration and bending measuring device | |
| CN202547906U (en) | Vibration isolation performance testing device for corrugated pipe | |
| CN101115980B (en) | Self-supporting and self-aligning vibration exciter | |
| CN104176230B (en) | Tapered airfoil vibration control apparatus and method based on Eddy current displacement sensor | |
| CN204594644U (en) | The contactless modal test system of a kind of acoustically-driven | |
| Li et al. | Precision analysis of forced-oscillation device: numerical modelling and experimental investigations | |
| US3320796A (en) | Vibration generation and measurement | |
| CN105866473A (en) | Motor vibration acceleration measurement method and apparatus thereof | |
| CN206056899U (en) | A kind of straight-line guide rail slide block device for testing dynamic stiffness | |
| CA2985482C (en) | Multiple actuator vibrator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180410 Termination date: 20200829 |