CN107796582A - That vibrates occurrence of equipment crosses displacement protection system and method - Google Patents
That vibrates occurrence of equipment crosses displacement protection system and method Download PDFInfo
- Publication number
- CN107796582A CN107796582A CN201711307398.3A CN201711307398A CN107796582A CN 107796582 A CN107796582 A CN 107796582A CN 201711307398 A CN201711307398 A CN 201711307398A CN 107796582 A CN107796582 A CN 107796582A
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- CN
- China
- Prior art keywords
- equipment
- occurrence
- displacement
- vibration
- power amplifier
- Prior art date
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Classifications
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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
Abstract
The invention discloses a kind of displacement guard method excessively for vibrating occurrence of equipment, including：When vibrating occurrence of equipment work, the voltage signal of power amplifier output is converted to the displacement signal of the moving component of vibration occurrence of equipment with integrator, wherein the relation between the displacement D of the moving component and the output voltage V of power amplifier meets： Wherein, B is the magnetic flux density in vibration occurrence of equipment magnetic circuit system, and L is the effective length of driving coil in vibration occurrence of equipment, and sin ω t are SIN function；Afterwards with comparator by institute's displacement signal compared with preset value, it is whether abnormal so as to judge to vibrate the displacement of the moving component of occurrence of equipment.The invention also discloses a kind of displacement of crossing for vibrating occurrence of equipment to protect system.The present invention to the structure for vibrating occurrence of equipment without significantly being adjusted, you can is realized the timely monitoring and adjustment of the moving component displacement amplitude to vibrating occurrence of equipment, is prevented its over-travel, controllability is good, and cost is low, and safety coefficient is high.
Description
Technical field
The present invention relates to vibration test technology field, and system is protected more particularly to a kind of displacement of crossing for vibrating occurrence of equipment
And method.
Background technology
With reference to shown in Fig. 1, No. ZL200820199291.1 discloses a kind of electrical vibration table moving coil displacement protection switch,
Mainly it is made up of two stage body metal contacts 4,5 on the moving-coil metal feeler lever 2 and stage body 3 on moving-coil 1, the moving-coil metal touches
Bar 2 is fixedly arranged on the sidepiece of moving-coil 1 with end towards stage body 3, and the two stage bodies metal contact 4,5 sets up separately corresponding to metal feeler lever 2
In moving-coil metal feeler lever 2 along the both sides on moving-coil direction of vibration；4,5 points of the moving-coil metal feeler lever 2 and two stage body metal contacts
Do not coordinate, the two stage bodies metal contact 4,5 is electrically connected to each other and picks out the terminals as switch, and the moving-coil metal touches
Bar 2 picks out another terminals as switch.When the moving-coil of shake table, which exceedes rated displacement, to move, this protection switch is connected,
So as to timely alarm or shut down electric vibration table, avoid occurring the accident of moving-coil damaged in collision, saved electric vibration table
Production and the cost of maintenance, while the use cost of electric vibration table is also reduced, reduce application risk.
But such a moving-coil crosses displacement protected mode and following defect at least be present：
1st, metal feeler lever and metal contact surface easily aoxidize；
2nd, high-frequency collides between metal feeler lever and metal contact, causes metal feeler lever easily to fracture, and metal
Feeler lever is extended in magnetic gap, and easily larger damage is produced to vibration occurrence of equipment after fractureing, meanwhile, after fractureing, displacement protection is lost
Effect, easily causes danger.
The content of the invention
It is an object of the invention to provide a kind of displacement of crossing for vibrating occurrence of equipment to protect system and method, existing to overcome
Deficiency in technology.
To achieve the above object, the present invention provides following technical scheme：
Displacement guard method is crossed the embodiments of the invention provide a kind of vibration occurrence of equipment, it includes：
When vibrating occurrence of equipment work, the voltage signal of power amplifier output is converted to by vibration hair with integrator
The displacement signal of the moving component of generating apparatus；
With comparator by institute's displacement signal compared with preset value, so as to judge vibrate occurrence of equipment moving component
Displacement it is whether abnormal.
Further, when vibrating occurrence of equipment work, the displacement D of the moving component and the output electricity of power amplifier
The relation between V is pressed to meet：
Wherein, B is the magnetic flux density in vibration occurrence of equipment magnetic circuit system, and L is driving coil in vibration occurrence of equipment
Effective length, sin ω t are SIN function.
Further, the signal input part of the integrator is connected to the output end of power amplifier, the integrator
Signal output part is connected with comparator.
Further, the integrator is also connected with power amplifier protection circuit.
Further, the comparator is connected with vibrating the controller numeral input mouth of occurrence of equipment.
Further, the vibration sends equipment and swashed including electric vibration table, electric activator, electromagnetic vibration generator system or electromagnetism
Shake device etc., but not limited to this.
The embodiment of the present invention additionally provides a kind of displacement of crossing for vibrating occurrence of equipment and protects system, the vibration occurrence of equipment
Connected through power amplifier and control, the displacement protection system of crossing includes：
Integrator, its voltage signal of power amplifier output is converted into displacement signal, wherein, vibration send out
When generating apparatus works, the relation between the displacement D of the moving component and the output voltage V of power amplifier meets：
B is the magnetic flux density in vibration occurrence of equipment magnetic circuit system, and L is effective length of driving coil in vibration occurrence of equipment
Degree, sin ω t are SIN function；
Comparator, to by institute's displacement signal compared with preset value, to judge whether the displacement of moving component different
Often.
Further, the signal input part of the integrator is connected to the output end of power amplifier, the integrator
Signal output part is connected with comparator, and the comparator is connected with the controller numeral input mouth.
Further, the vibration sends equipment and swashed including electric vibration table, electric activator, electromagnetic vibration generator system or electromagnetism
Shake device etc., but not limited to this.
Compared with prior art, the present invention sets up integrator and comparator by the output end in power amplifier, without
The structure for vibrating occurrence of equipment is significantly adjusted, you can realize to vibrate occurrence of equipment moving component displacement amplitude and
When monitor and adjustment, prevent its over-travel, controllability is good, and cost is low, and safety coefficient is high.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in invention, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that a kind of electric vibrating occurrence of equipment moving-coil crosses displacement protective switch in the prior art；
Fig. 2 is a kind of operation principle block diagram crossed displacement and protect system in an exemplary embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, detailed retouch is carried out to the technical scheme in the embodiment of the present invention
State, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
It will be illustrated as follows so that the vibration occurrence of equipment is electric vibration table as an example.The control of the electric vibration table
Instrument is connected with power amplifier, and power amplifier and driving coil etc. are connected, and wherein driving coil is fixed on electric vibration table
On moving component-moving-coil.The sine or random signal provided by controller is input to electric vibrating after power amplifier amplifies
Exciting force is produced in platform and moves back and forth moving-coil.
Refer to shown in Fig. 2, include integrator and comparator with the displacement protection system of crossing that the electric vibration table coordinates, its
Signal input part, the signal output part of middle integrator are connected with power amplifier, comparator respectively, and the comparator can also be with
Vibrate the controller numeral input mouth connection of occurrence of equipment.
When electric vibration table works, a counter voltage e can be produced in the drive coil, is met：
E=BLVsine (1)
Wherein, B be electric vibration table magnetic circuit system in magnetic flux density, L be driving coil effective length, VsineIt is
The vibration velocity of circle.
In the vector formulas of formula (2), V is power amplifier voltage, and I is the size of current in driving coil, and R is driving
The resistance of coil, e are foregoing counter voltage.
When electric vibration table is under low frequency operation state, meet：
The voltage V of integrator receiving power amplifier out, and voltage V is integrated, to obtain vibration
The displacement D of device drives coil, meet：
D=∫ Vpsinωt (4)
Substitution formula (1), can be obtained：
Substitution formula (3), can be obtained：
In formula (4)~(6), Vp is crest voltage, and sin ω t are SIN function.In formula (6), BL is constant.
Thus, it is possible to the voltage signal of power amplifier output is converted to the displacement signal of moving-coil.
With comparator by institute's displacement signal compared with preset value, if abnormal, judge that displacement is transfinited.Now can be with
Sine or the random signal that it is exported to power amplifier are adjusted by controller, and then change the motion state of moving-coil, is avoided
Displacement is crossed, realizes the protection to electric vibration table.
Likewise, the displacement protection system and method for crossing of the present invention is also applied to other vibration occurrence of equipment, such as electricity
Dynamic vibrator, electromagnetic vibration generator system, electromagnetic exciter etc., and not limited to this.
Described above is only the embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of vibration occurrence of equipment crosses displacement guard method, it is characterised in that including：
When vibrating occurrence of equipment work, the voltage signal of power amplifier output is converted to by vibration with integrator and set
The displacement signal of standby moving component；
With comparator by institute's displacement signal compared with preset value, so as to judge vibrate occurrence of equipment moving component position
Whether abnormal move.
2. vibration occurrence of equipment according to claim 1 crosses displacement guard method, it is characterised in that is set in vibration
During standby work, the relation between the displacement D of the moving component and the output voltage V of power amplifier meets：
<mrow>
<mi>D</mi>
<mo>&cong;</mo>
<mo>&Integral;</mo>
<mfrac>
<mi>V</mi>
<mrow>
<mi>B</mi>
<mi>L</mi>
</mrow>
</mfrac>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mi>&omega;</mi>
<mi>t</mi>
</mrow>
Wherein, B is the magnetic flux density in vibration occurrence of equipment magnetic circuit system, and L is the effective of driving coil in vibration occurrence of equipment
Length, sin ω t are SIN function.
3. vibration occurrence of equipment according to claim 1 or 2 crosses displacement guard method, it is characterised in that the integration
The signal input part of device is connected to the output end of power amplifier, and the signal output part of the integrator is connected with comparator.
4. vibration occurrence of equipment according to claim 3 crosses displacement guard method, it is characterised in that the integrator is also
It is connected with power amplifier protection circuit.
5. vibration occurrence of equipment according to claim 1 or 2 crosses displacement guard method, it is characterised in that the comparison
Device is connected with vibrating the controller numeral input mouth of occurrence of equipment.
6. vibration occurrence of equipment according to claim 1 or 2 crosses displacement guard method, it is characterised in that the vibration
Sending equipment includes electric vibration table, electric activator, electromagnetic vibration generator system or electromagnetic exciter.
7. system is protected in a kind of displacement of crossing for vibrating occurrence of equipment, the vibration occurrence of equipment connects through power amplifier and control
Connect, it is characterised in that the displacement protection system of crossing includes：
Integrator, its voltage signal of power amplifier output is converted into displacement signal, wherein, vibration set
During standby work, the relation between the displacement D of the moving component and the output voltage V of power amplifier meets：
<mrow>
<mi>D</mi>
<mo>&cong;</mo>
<mo>&Integral;</mo>
<mfrac>
<mi>V</mi>
<mrow>
<mi>B</mi>
<mi>L</mi>
</mrow>
</mfrac>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mi>&omega;</mi>
<mi>t</mi>
</mrow>
B is the magnetic flux density in vibration occurrence of equipment magnetic circuit system, and L is the effective length of driving coil in vibration occurrence of equipment,
Sin ω t are SIN function；
Comparator, to by institute's displacement signal compared with preset value, to judge whether the displacement of moving component abnormal.
8. shake table according to claim 7 crosses displacement protection system, it is characterised in that the signal of the integrator is defeated
Enter end and be connected to the output end of power amplifier, the signal output part of the integrator is connected with comparator, the comparator and
The controller numeral input mouth connection.
9. system is protected in the displacement of crossing of the vibration occurrence of equipment according to claim 7 or 8, it is characterised in that the integration
Device is also connected with power amplifier protection circuit.
10. system is protected in the displacement of crossing of the vibration occurrence of equipment according to claim 7 or 8, it is characterised in that the vibration
Sending equipment includes electric vibration table, electric activator, electromagnetic vibration generator system or electromagnetic exciter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307398.3A CN107796582A (en) | 2017-12-11 | 2017-12-11 | That vibrates occurrence of equipment crosses displacement protection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307398.3A CN107796582A (en) | 2017-12-11 | 2017-12-11 | That vibrates occurrence of equipment crosses displacement protection system and method |
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| Publication Number | Publication Date |
|---|---|
| CN107796582A true CN107796582A (en) | 2018-03-13 |
Family
ID=61537777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711307398.3A Pending CN107796582A (en) | 2017-12-11 | 2017-12-11 | That vibrates occurrence of equipment crosses displacement protection system and method |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280083A (en) * | 1978-07-17 | 1981-07-21 | Hitachi, Ltd. | Apparatus for limiting acceleration in a servosystem |
| CN85104107A (en) * | 1985-05-30 | 1986-06-10 | 国家地震局工程力学研究所 | Multifunctional electromagnetic vibration generator |
| US5182887A (en) * | 1988-10-06 | 1993-02-02 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Vibration damping system |
| CN101281087A (en) * | 2008-05-13 | 2008-10-08 | 苏州试验仪器总厂 | Dynamoelectric oscillating table excitation voltage automatic adjusting method |
| JP2010038872A (en) * | 2008-08-08 | 2010-02-18 | Hitachi Plant Technologies Ltd | Vibration tester |
-
2017
- 2017-12-11 CN CN201711307398.3A patent/CN107796582A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280083A (en) * | 1978-07-17 | 1981-07-21 | Hitachi, Ltd. | Apparatus for limiting acceleration in a servosystem |
| CN85104107A (en) * | 1985-05-30 | 1986-06-10 | 国家地震局工程力学研究所 | Multifunctional electromagnetic vibration generator |
| US5182887A (en) * | 1988-10-06 | 1993-02-02 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Vibration damping system |
| CN101281087A (en) * | 2008-05-13 | 2008-10-08 | 苏州试验仪器总厂 | Dynamoelectric oscillating table excitation voltage automatic adjusting method |
| JP2010038872A (en) * | 2008-08-08 | 2010-02-18 | Hitachi Plant Technologies Ltd | Vibration tester |
Non-Patent Citations (1)
| Title |
|---|
| 陈道铎\N\N\N,郑家龙: "低频标准振动台位移限制电路的探讨" * |
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