CN110375940A - A kind of low frequency vibration isolation testboard and vibration detecting system - Google Patents
A kind of low frequency vibration isolation testboard and vibration detecting system Download PDFInfo
- Publication number
- CN110375940A CN110375940A CN201910756139.1A CN201910756139A CN110375940A CN 110375940 A CN110375940 A CN 110375940A CN 201910756139 A CN201910756139 A CN 201910756139A CN 110375940 A CN110375940 A CN 110375940A
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- vibration
- speed camera
- isolator
- testboard
- low frequency
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of low frequency vibration isolation testboard and vibration detecting system, vibration isolator is fixed on a vibration table, obtains inputted vibration from shake table, is isolated by internal structure or is weakened and vibrated, and then exports final vibration from the platform at the top of vibration isolator.High-speed camera and tungsten filament lighting lamp are arranged in the front and rear sides of shake table, and the light of tungsten filament lighting lamp enters high-speed camera, and then forms shade by the part that vibration isolator blocks, so as to see vibration isolator in high-speed camera.The present invention is suitable for the detection of the low-frequency vibration of millimeter and scale above, can conveniently and efficiently detect the vibration isolating effect of the vibration isolator worked within the scope of this.The present invention has the advantages that 1, provide a kind of amplitude and the adjustable vibration source platform of frequency, it is simple and practical, take into account function and cost；2, vibration information, strong applicability, to working environment without particular/special requirement are obtained with the method for Computer Image Processing；The non-contact measurement to vibration is realized, human error is not introduced.
Description
Technical field
The invention belongs to vibration experiment and detection field, it is related to a kind of low frequency vibration isolation testboard and vibration detecting system.
Background technique
Vibration is phenomenon relatively conventional in mechanical engineering, under many scenes, vibration be it is harmful, such as the vibration of automobile
Uncomfortable feeling can be caused to driver or passenger, the vibration of rocket, aircraft can cause the loosening of structure even to destroy, warship
Vibration caused by dynamical system can then make carrier itself show apparent noise characteristic, increase exposure in ship and submarine system
Risk.In Ultra-precision Turning and fields of measurement, such as ultraprecise semiconductors manufacture, scanning tunneling microscope and atomic force microscope
Measurement, vibration have been increasingly becoming an important factor for hindering its precision to improve.Therefore, how to be isolated or reduce vibration to greatest extent
It is dynamic, it is mechanical engineering field and Ultra-precision Turning and fields of measurement very concern.In view of this, miscellaneous vibration isolation
Or damper emerges one after another, the Chinese patent CN101709763B as Chen XueDong et al. applies discloses a kind of horizontal two-degree-of-freedom
Vibration isolating mechanism is to utilize a kind of magnet identical charges repel each other system that the characteristic that there is a natural attraction between the sexes constructs positive and negative Stiffness；Zhang Xiaopeng
Et al. the Chinese patent CN109780126A of application disclose a kind of air spring and rail vehicle, provide a kind of built-in vibration damping
Device and the air spring laterally with certain displacement characteristic, can take into account the decaying of low frequency and high-frequency vibration, enhance hanging down for vehicle
To damping property.
For various vibration isolators, the assessment of vibration isolating effect, which needs to test by vibration isolation, goes to complete.Vibration isolation test needs to have
Standby vibration source platform and vibration test system.
A kind of micrometer vibration using femtosecond laser is disclosed by the Chinese patent CN106289499B of military rapid development et al. application
Dynamic system and micrometer method for oscillating, belong to photoelectric precision fields of measurement.The invention includes microwave atomic clock, optical fiber femtosecond laser
Device, servocontrol equipment, data acquisition equipment, host computer and optical measurement components, basic principle are that balance optical cross-correlation is former
Reason.It is to measure that sensitive, data processing is simple the advantages of invention, is mainly used for high-precision, real-time micrometer vibration.The invention
Structure composition and functional characteristics determine that it is expensive, use cost is high, are primarily adapted for use in microvibration measuring field.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes for many device for vibration insutation in mechanical vibration isolation field
A kind of low frequency vibration isolation testboard and vibration detecting system, avoid the problems such as expensive, use condition is harsh.
Technical solution
A kind of low frequency vibration isolation testboard, it is characterised in that including vibration source sewing platform base 1, guide rod 3, vibration source motor 6, swing arm 7, connect
Bar 8, shake table 9 and vibration isolator 12；Vibration source sewing platform base 1 is cube structure, and bottom is equipped on motor mounting base 4 and pedestal
Motor support base 5, vibration source motor 6 are fixed on motor support base 5, and swing arm 7 and 6 axis connection of vibration source motor, the end of swing arm 7 hingedly connects
Bar 8；The upper and lower side frame of opposite two side of vibration source sewing platform base 1 is equipped with guide rod supports seat 2；Shake table 9 is a size
Less than the cube structure of vibration source sewing platform base 1, lower part is equipped with vibration isolator mounting base 11, and vibration isolator 12 is placed in vibration isolator installation bottom
On plate 11；The bottom of shake table 9 is equipped with connecting rod hinged seat 13, and connecting rod 8 and connecting rod hinged seat 13 are hinged；Shake table 9 it is opposite two
A side up and down is equipped with linear bearing sliding block 10, and two guide rods 3 are each passed through after the linear bearing sliding block 10 of side to be fixed on and lead
On bar support base 2.
A kind of vibration detecting system constituted using the low frequency vibration isolation testboard, it is characterised in that surveyed including low frequency vibration isolation
Test stand, high-speed camera 14, image processor 15, calico 16 and tungsten filament lighting lamp 18；Calico 16 and tungsten filament lighting lamp 18 are successively
Set on the side of low frequency vibration isolation testboard, high-speed camera 14 is located at the other side of the low frequency vibration isolation testboard relative to calico 16,
The output signal of high-speed camera 14 connects image processor 15；The light of tungsten filament lighting lamp 18 passes through at the homogenization of calico 16
After reason, into high-speed camera 14, and shade is then formed by the part that vibration isolator 12 blocks, so as in high-speed camera
See vibration isolator 12；Graphics process station 15 extracts the profile of 12 top platform of vibration isolator from high speed camera captured image,
It detects its profile to change with time, to obtain the output vibration information of vibration isolator 12；Will output vibration information with it is known
Inputted vibration information compares, and can be detected out the anti-vibration performance of vibration isolator.
Beneficial effect
A kind of low frequency vibration isolation testboard and vibration detecting system proposed by the present invention, vibration source platform for provide amplitude and
The adjustable vibration source of frequency, the inputted vibration as tested vibration isolator.Vibration source platform mainly includes vibration source sewing platform base, guide rod branch
Support seat, guide rod, motor support base, vibration source motor, swing arm, connecting rod, shake table, vibration isolator mounting base, linear bearing sliding block etc..Institute
The pedestal that vibration source sewing platform base is entire vibration source platform is stated, guide rod is vertically mounted on vibration source sewing platform base by guide rod supports seat.Vibration
Linear bearing sliding block is installed, linear bearing slide block set is on guide rod, and therefore, shake table can be along gliding on guide rod on platform
It is dynamic.The bottom of vibration source platform is equipped with vibration source motor, is equipped with swing arm on vibration source motor output shaft, and the one of the end of swing arm and connecting rod
End is hinged.The bottom of shake table is equipped with connecting rod hinged seat, and the other end of connecting rod hinged seat and connecting rod is hinged.Vibration source motor, pendulum
Arm, connecting rod and connecting rod hinged seat constitute crank link mechanism, to convert shake table along guide rod for the rotation of vibration source motor
Up-down vibration --- namely the inputted vibration of tested vibration isolator.The frequency that shake table vibrates up and down depends on vibration source motor
Revolving speed, the amplitude of vibration depends on the length of swing arm.It, can be by adjusting vibration source motor speed and pendulum arm length in practical operation
To obtain required inputted vibration.
Vibration detecting system is used to detect the output vibration of tested vibration isolator.The vibration isolator is fixed on shake table
On, inputted vibration is obtained from shake table, is isolated by internal structure or is weakened and vibrated, then by final vibration from vibration isolator
The platform at top exports.Vibration detecting system includes high-speed camera, image procossing station, calico, tungsten filament lighting lamp.The high speed
Video camera and tungsten filament lighting lamp are arranged in the front and rear sides of shake table, and the light of tungsten filament lighting lamp enters high-speed camera, and by
The part that vibration isolator blocks then forms shade, so as to see vibration isolator in high-speed camera.Graphics process station is from a high speed
The profile that vibration isolator top platform is extracted in camera captured image detects its profile and changes with time, thus obtain every
The output vibration information of vibration device.Output vibration information is compared with known inputted vibration information, can be detected out vibration isolator
Anti-vibration performance.
The present invention is suitable for the detection of the low-frequency vibration of millimeter and scale above, can conveniently and efficiently detect to work in this
The vibration isolating effect of vibration isolator in range.The present invention has the advantages that 1, provide a kind of amplitude and the adjustable vibration source platform of frequency,
It is simple and practical, take into account function and cost；2, vibration information, strong applicability, to work are obtained with the method for Computer Image Processing
Environment is without particular/special requirement；The non-contact measurement to vibration is realized, human error is not introduced.
Detailed description of the invention
Fig. 1 is overall schematic of the invention
Fig. 2 is the structural schematic diagram of vibration isolation testboard
Fig. 3 is the structural schematic diagram of vibration source platform
Fig. 4 is the structural schematic diagram of shake table
Fig. 5 is the connection schematic diagram of vibration source platform and shake table
Description of symbols: 1-vibration source sewing platform base, 2-guide rod supports seats, 3-guide rods, 4-motor mounting bases, 5-
Motor support base, 6-vibration source motors, 7-swing arms, 8-connecting rods, 9-shake tables, 10-linear bearing sliding blocks, 11-vibration isolators peace
Fill bottom plate, 12-vibration isolators, 13-connecting rod hinged seats, 14-high-speed cameras, 15-image processors, 16-calicos, 17-
Calico frame, 18-tungsten filament lighting lamps
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
Low frequency vibration isolation testboard, as shown in Fig. 2, the vibration source platform include vibration source sewing platform base 1, guide rod supports seat 2, guide rod 3,
Motor mounting base 4, motor support base 5, vibration source motor 6, swing arm 7, connecting rod 8, shake table 9, linear bearing sliding block 10, vibration isolator peace
Fill bottom plate 11, vibration isolator 12 and connecting rod hinged seat 13.The effect of vibration source platform is to provide an amplitude and the adjustable vibration of frequency
Source, the inputted vibration as tested vibration isolator.
As shown in figure 3, being equipped with guide rod supports seat 2 on vibration source sewing platform base 1, the guide rod 3 is vertically fixed on guide rod supports
In seat 2.The bottom of vibration source sewing platform base 1 is equipped with motor mounting base 4, and motor support base 5 is equipped on motor mounting base 4, electricity
Vibration source motor 6 is installed on machine support 5.Swing arm 7, the end articulated linkage of swing arm 7 are installed on 6 output shaft of vibration source motor
8。
As shown in figure 4, being equipped with vibration isolator mounting base 11 on the shake table 9, for fixing vibration isolator to be tested
12；The bottom of shake table is equipped with connecting rod hinged seat 13.Linear bearing sliding block 10 is also equipped on the shake table 9.
As shown in Fig. 2, linear bearing sliding block 10 is sleeved on guide rod 3, therefore shake table 9 can be slided along guide rod 3.Such as
Shown in Fig. 5, connecting rod hinged seat 13 and the other end of connecting rod 8 are hinged, vibration source motor 6,13 structure of swing arm 7, connecting rod 8 and connecting rod hinged seat
At crank link mechanism, to convert shake table 9 along the up-down vibration of guide rod 3 for vibration source motor --- namely by
The inputted vibration of the vibration isolator 12 of test.The frequency that shake table 9 vibrates up and down depends on the revolving speed of vibration source motor 6, the width of vibration
Value depends on the length of swing arm 7.It, can be required defeated to obtain by adjusting vibration source motor speed and pendulum arm length in practical operation
Enter vibration.
Vibration detecting system is used to detect the output vibration of tested vibration isolator.The vibration isolator 12 is fixed on shake table
On 9, inputted vibration is obtained from shake table, is isolated by internal structure or is weakened and vibrated, then by final vibration from vibration isolation
Platform output at the top of device.Vibration detecting system includes high-speed camera 14, image procossing station 15, calico 16, calico frame 17
With tungsten filament lighting lamp 18.The high-speed camera 14 and tungsten filament lighting lamp 18 are arranged in the front and rear sides of shake table 9, tungsten wire illumination
The light of lamp 18 is after the Homogenization Treatments of calico 16, and into high-speed camera 14, and the part blocked by vibration isolator 12 is then
Shade is formed, so as to see vibration isolator 12 in high-speed camera.Graphics process station 15 is from high speed camera captured image
In extract the profile of 12 top platform of vibration isolator, detect its profile and change with time, to obtain the output of vibration isolator 12
Vibration information.Output vibration information is compared with known inputted vibration information, can be detected out the anti-vibration performance of vibration isolator.
Claims (2)
1. a kind of low frequency vibration isolation testboard, it is characterised in that including vibration source sewing platform base (1), guide rod (3), vibration source motor (6), swing arm
(7), connecting rod (8), shake table (9) and vibration isolator (12)；Vibration source sewing platform base (1) is cube structure, and bottom is installed equipped with motor
Motor support base (5) on pedestal (4) and pedestal, vibration source motor (6) are fixed on motor support base (5), swing arm (7) and vibration source motor
(6) axis connection, the end articulated linkage (8) of swing arm (7)；Vibration source sewing platform base 1) opposite two side upper and lower side frame on set
There are guide rod supports seat (2)；Shake table (9) is the cube structure that a size is less than vibration source sewing platform base (1), and lower part is equipped with vibration isolation
Device mounting base (11), vibration isolator (12) are placed on vibration isolator mounting base (11)；It is hinged that the bottom of shake table (9) is equipped with connecting rod
Seat (13), connecting rod (8) and connecting rod hinged seat (13) are hinged；About two opposite sides of shake table (9) are sliding equipped with linear bearing
Block (10), two guide rods (3) are fixed on guide rod supports seat (2) after being each passed through the linear bearing sliding block (10) of side.
2. a kind of vibration detecting system constituted using low frequency vibration isolation testboard described in claim 1, it is characterised in that including low
Frequency vibration isolation testboard, high-speed camera (14), image processor (15), calico (16) and tungsten filament lighting lamp (18)；Calico (16)
The side of low frequency vibration isolation testboard is sequentially arranged in tungsten filament lighting lamp (18), high-speed camera (14) is located at low frequency vibration isolation testboard
Relative to the other side of calico (16), the output signal of high-speed camera (14) connects image processor (15)；Tungsten filament lighting lamp
(18) light is after the Homogenization Treatments of calico (16), into high-speed camera (14), and blocked by vibration isolator (12)
Part then forms shade, so as to see vibration isolator (12) in high-speed camera；Graphics process station (15) is from high speed camera
The profile that vibration isolator (12) top platform is extracted in captured image detects its profile and changes with time, thus obtain every
The output vibration information of vibration device (12)；Output vibration information is compared with known inputted vibration information, can be detected out every
The anti-vibration performance of vibration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910756139.1A CN110375940A (en) | 2019-08-16 | 2019-08-16 | A kind of low frequency vibration isolation testboard and vibration detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910756139.1A CN110375940A (en) | 2019-08-16 | 2019-08-16 | A kind of low frequency vibration isolation testboard and vibration detecting system |
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| CN110375940A true CN110375940A (en) | 2019-10-25 |
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| CN201910756139.1A Pending CN110375940A (en) | 2019-08-16 | 2019-08-16 | A kind of low frequency vibration isolation testboard and vibration detecting system |
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| CN112098027A (en) * | 2020-09-17 | 2020-12-18 | 北京航空航天大学 | Vibration testing device and method special for thermal field emission electron gun |
| CN114964680A (en) * | 2022-08-02 | 2022-08-30 | 中建安装集团有限公司 | Floating floor slab vibration experiment table based on distributed optical fiber monitoring and testing method |
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| CN114964680A (en) * | 2022-08-02 | 2022-08-30 | 中建安装集团有限公司 | Floating floor slab vibration experiment table based on distributed optical fiber monitoring and testing method |
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