CN207585867U - That vibrates occurrence of equipment crosses displacement protection system - Google Patents
That vibrates occurrence of equipment crosses displacement protection system Download PDFInfo
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- CN207585867U CN207585867U CN201721710894.9U CN201721710894U CN207585867U CN 207585867 U CN207585867 U CN 207585867U CN 201721710894 U CN201721710894 U CN 201721710894U CN 207585867 U CN207585867 U CN 207585867U
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Abstract
Displacement protection system is crossed the utility model discloses a kind of vibration occurrence of equipment, the vibration occurrence of equipment is connected through power amplifier with controlling, and the displacement protection system of crossing includes：Integrator, the voltage signal of power amplifier output is converted to displacement signal, wherein, when vibrating occurrence of equipment work, the relationship between the displacement D of the moving component and the output voltage V of power amplifier meets：, B is the magnetic flux density vibrated in occurrence of equipment magnetic circuit system, and L is the effective length for vibrating driving coil in occurrence of equipment, and sin ω t are SIN function；Comparator, institute's displacement signal to be compared with preset value, to judge whether the displacement of moving component is abnormal.The utility model is without substantially adjusting the structure for vibrating occurrence of equipment, you can realizes the timely monitoring and adjustment of the moving component displacement amplitude to vibrating occurrence of equipment, prevents its over-travel, controllability is good, at low cost, and safety coefficient is high.
Description
Technical field
The utility model is related to vibration test technology fields, are protected more particularly to a kind of displacement of crossing for vibrating occurrence of equipment
System.
Background technology
With reference to shown in Fig. 1, No. ZL200820199291.1 discloses a kind of electrical vibration table moving coil displacement protection switch,
It is mainly made of two stage body metal contacts 4,5 on the moving-coil metal feeler lever 2 on moving-coil 1 and stage body 3, the moving-coil metal touches
Bar 2 is fixedly arranged on towards stage body 3 on 1 side of moving-coil with end, 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 is more than that rated displacement moves, 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 repair, while the use cost of electric vibration table is also reduced, reduce application risk.
But such moving-coil crosses displacement protected mode, and at least there are following defects：
1st, metal feeler lever and metal contact surface easily aoxidize；
2nd, high-frequency collides between metal feeler lever and metal contact, and metal feeler lever is caused easily to fracture, and metal
Feeler lever is extended in magnetic gap, and easily larger damage is generated to vibration occurrence of equipment after fractureing, meanwhile, after fractureing, displacement protection is lost
Effect, easily causes danger.
Utility model content
The purpose of this utility model is to provide a kind of displacements of crossing for vibrating occurrence of equipment to protect system, to overcome existing skill
Deficiency in art.
To achieve the above object, the utility model provides following technical solution：
The utility model embodiment provides a kind of displacement of crossing for vibrating occurrence of equipment and protects system, and the vibration is set
Standby to be connected through power amplifier and control, the displacement protection system of crossing includes：
Integrator, the voltage signal of power amplifier output is converted to displacement signal, wherein, it is sent out in vibration
When generating apparatus works, the relationship between the displacement D of the moving component and the output voltage V of power amplifier meets：
B is the magnetic flux density vibrated in occurrence of equipment magnetic circuit system, and L is the effective length for vibrating driving coil in occurrence of equipment
Degree, sin ω t are SIN function；
Comparator, institute's displacement signal to be compared with preset value, to judge whether the displacement of moving component is different
Often.
Further, the signal input part of the integrator is connected to the output terminal of power amplifier, the integrator
Signal output end is connect with comparator, and the comparator is connect with the controller numeral input mouth.
Further, the vibration sending device swashs 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 utility model adds integrator and comparator by the output terminal in power amplifier,
Without substantially being adjusted to the structure for vibrating occurrence of equipment, you can realize the moving component displacement amplitude to vibrating occurrence of equipment
Timely monitoring and adjustment, prevent its over-travel, controllability is good, at low cost, and safety coefficient is high.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments described in the utility model, for those of ordinary skill in the art, is not making the creative labor
Under the premise of, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram 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 one exemplary embodiments of the utility model.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Detailed description, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole implementation
Example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, shall fall within the protection scope of the present invention.
It as follows will be by the vibration occurrence of equipment to be illustrated for electric vibration table.The control of the electric vibration table
Instrument is connect with power amplifier, and power amplifier and driving coil etc. are connect, 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 generated in platform and moves back and forth moving-coil.
It please refers to shown in Fig. 2, includes integrator and comparator with the displacement protection system of crossing of electric vibration table cooperation,
Signal input part, the signal output end of middle integrator are connect respectively with power amplifier, comparator, 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 generated 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 aforementioned counter voltage.
When electric vibration table is under low frequency operation state, meet：
Integrator receives the voltage V of power amplifier output, and voltage V is integrated, to obtain vibration
The displacement D of device drives coil meets：
D=∫ Vpsinωt (4)
Substitution formula (1), can obtain：
Substitution formula (3), can obtain：
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.
Institute's displacement signal with preset value is compared with comparator, if abnormal, judges that displacement is transfinited.It at this time can be with
Sine or the random signal that it is exported to power amplifier are adjusted, and then change the motion state of moving-coil by controller, avoided
Displacement is crossed, realizes the protection to electric vibration table.
Likewise, the displacement protection system and method for crossing of the utility model is also suitable for other vibration occurrence of equipment, example
Such as electric activator, electromagnetic vibration generator system, electromagnetic exciter, and it is without being limited thereto.
The above is only specific embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (4)
1. 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
It connects, which is characterized in that the displacement protection system of crossing includes：
Integrator, the voltage signal of power amplifier output is converted to displacement signal, wherein, it is set in vibration
During standby work, the relationship vibrated between the displacement D of the moving component of occurrence of equipment and the output voltage V of power amplifier meets：
B is the magnetic flux density vibrated in occurrence of equipment magnetic circuit system, and L is the effective length for vibrating driving coil in occurrence of equipment,
Sin ω t are SIN function；
Comparator, institute's displacement signal to be compared with preset value, to judge whether the displacement of moving component is abnormal.
2. vibration occurrence of equipment according to claim 1 crosses displacement protection system, which is characterized in that the integrator
Signal input part is connected to the output terminal of power amplifier, and the signal output end of the integrator is connect with comparator, the ratio
It is connect compared with device with vibrating the controller numeral input mouth of occurrence of equipment.
3. vibration occurrence of equipment according to claim 1 or 2 crosses displacement protection system, which is characterized in that the integration
Device is also connect with power amplifier protection circuit.
4. vibration occurrence of equipment according to claim 1 or 2 crosses displacement protection system, which is characterized in that the vibration
Occurrence of equipment includes electric vibration table, electric activator, electromagnetic vibration generator system or electromagnetic exciter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721710894.9U CN207585867U (en) | 2017-12-11 | 2017-12-11 | That vibrates occurrence of equipment crosses displacement protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721710894.9U CN207585867U (en) | 2017-12-11 | 2017-12-11 | That vibrates occurrence of equipment crosses displacement protection system |
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| Publication Number | Publication Date |
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| CN207585867U true CN207585867U (en) | 2018-07-06 |
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ID=62736671
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| CN201721710894.9U Active CN207585867U (en) | 2017-12-11 | 2017-12-11 | That vibrates occurrence of equipment crosses displacement protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697409A (en) * | 2020-12-08 | 2021-04-23 | 南京航空航天大学 | Test bed and test method for blade disc coupling rotor |
-
2017
- 2017-12-11 CN CN201721710894.9U patent/CN207585867U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697409A (en) * | 2020-12-08 | 2021-04-23 | 南京航空航天大学 | Test bed and test method for blade disc coupling rotor |
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