CN204575293U - The pneumatic exciting device of a kind of noncontact - Google Patents
The pneumatic exciting device of a kind of noncontact Download PDFInfo
- Publication number
- CN204575293U CN204575293U CN201520202656.1U CN201520202656U CN204575293U CN 204575293 U CN204575293 U CN 204575293U CN 201520202656 U CN201520202656 U CN 201520202656U CN 204575293 U CN204575293 U CN 204575293U
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- solenoid valve
- air
- spring pole
- air spring
- model
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Abstract
The utility model discloses the pneumatic exciting device of a kind of noncontact, for carrying out pneumatic exciting to flexible structures such as air spring pole, forming primarily of air pump, pipeline, gas spout and solenoid valve; Be connected with branch air path by gas circuit splitter by the cylinder of air pump air feed; The termination of branch air path is provided with the gas spout controlled by solenoid valve; Described solenoid valve and gas spout are wholely set, and are supported on below air spring pole by tripod; Solenoid valve and control module are electrically connected.Air pump is by branch air path to solenoid valve inlet end input compressed-air, and the opening and closing of pulse signal property performance period that solenoid valve reception control unit sends, exports air pulse and encourage air spring pole.The utility model does not contact with model, and eliminate the additional stiffness of exciting device and displacement measuring device and additional mass to the impact of air spring pole kinematic behavior, simple and convenient, cost are low; Can be used for the mould measurement of the multiple flexible air spring pole such as cable-stayed bridge, suspension bridge.
Description
Technical field
The utility model relates to the pneumatic exciting device of a kind of noncontact, particularly relates to the novel exciting device of the flexible structure mould measurement such as cable-stayed bridge, suspension bridge air spring pole.
Background technology
At present, all wind tunnel test can be carried out when many large-span suspension bridges or cable-stayed bridge design.An important content of wind tunnel test is exactly the mode measuring cable-stayed bridge or suspension bridge air spring pole.Firmly hammer or vibrator need be made to contact with model structure during classic method test mode, load application, obtain the kinematic behavior of model by the method for free vibration or forced vibration.
Cable-stayed bridge, suspension bridge air spring pole mostly are flexible structure, and rigidity is less.Act directly on vibrator that model to test the result precision obtained lower.Because when power hammer or vibrator effect, bring larger additional stiffness and additional mass with the contact of model, make the kinematic behavior of structure change, cause the error of mode test result, the accuracy of the follow-up wind tunnel test of impact further.Traditional excitation method mostly is single-point-excitation in addition, can only inspire lower mode, is difficult to inspire the high order mode important to Wind-induced Vibration Analysis such as Bridge Flutters.
Utility model content
In view of this, the purpose of this utility model is to provide the pneumatic exciting device of a kind of noncontact, and elimination additional stiffness and additional mass are on the impact of air spring pole mode test result.This device can apply excitation to air spring pole, is convenient to test high order mode.
The technical solution of the utility model is: the pneumatic exciting device of a kind of noncontact, for carrying out pneumatic exciting to air spring pole, it is characterized in that: form primarily of air pump, pipeline, gas spout and solenoid valve; Be connected with branch air path by gas circuit splitter by the cylinder of air pump air feed; The termination of branch air path is provided with the gas spout controlled by solenoid valve; Described solenoid valve and gas spout are wholely set, and are supported on below air spring pole by tripod; Solenoid valve and control module are electrically connected.
Described air pump is high-pressure pump, and use 220V AC-powered, can produce high pressure air and be stored in the cylinder carried, output squeezing air pressure can regulate in certain limit; When the pressurized air in cylinder is due to after exporting and causing pressure to decline, air pump can make an immediate response and supplement pressure gas in cylinder, keeps pressure in cylinder to be stabilized in certain limit.Cylinder and threeway junction, threeway and sebific duct junction and sebific duct and solenoid valve junction all employ band and have carried out encapsulation process.
Described solenoid valve is high-frequency electromagnetic valve, and operating frequency is at more than 20Hz, and the signal that reception control unit sends performs opening and closing action, exports air pulse.Described control module adopts programmable logic controller (PLC) (PLC), and exportable high-frequency pulse signal, controls multiple solenoid valve by certain hour order opening and closing.
Described union piece is connected with solenoid valve base and is arranged on tripod, and enable exciting device near air spring pole, implement excitation, the dynamic respond after air spring pole excited target is gathered by laser displacement gauge.Laser displacement gauge is connected with data acquisition and treating apparatus.
The course of work of the present utility model and principle of work are: during work, and air pump provides stable high pressure air, and high pressure air is divided into some roads through threeway, and high pressure air is transported to the inlet end of solenoid valve by sebific duct.The signal that solenoid valve reception control unit sends realizes the opening and closing of solenoid valve, converts stable high pressure air to air pulse, then encourages air spring pole.Control module can send signal makes multiple solenoid valve implement excitation to air spring pole.After air spring pole is subject to air pulse excitation, by the displacement time-histories of each measuring point of laser displacement gauge measurement model.
Before operation, the pressure of adjustable air pump output squeezing air is to realize the excitation to air spring pole varying strength.By changing the frequency of control module output pulse signal, the frequency of solenoid valve opening and closing can be changed, with the air pulse exporting different frequency, air spring pole is encouraged.By changing the mistiming of each solenoid valve action, the air pulse excitation phase that each solenoid valve is exported is adjustable.
Compared with prior art, the beneficial effects of the utility model are:
Due to the air pulse excitation that the utility model is implemented air spring pole, the measurement of air spring pole dynamic respond adopts laser displacement gauge, neither contacts with model, eliminates the impact coming from exciting device and displacement measuring device additional mass and additional stiffness.The utility model can adopt multiplex pulse air-flow to encourage model, achieves excitation easily, easily inspires high order mode.Meanwhile, lay angle by what change tripod solenoid, can realize vertical, laterally and the excitation of longitudinal multiple directions.Therefore pneumatic exciting device of the present utility model is practically applicable in the multiple flexible structure mould measurement such as cable-stayed bridge, suspension bridge air spring pole, and it is applied widely.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is the installation diagram of the utility model embodiment;
Air pump 1; Cylinder 2; Threeway 3; The gas spout 4 that solenoid valve controls; Tripod 5; Laser displacement gauge 6; Air spring pole 7; Control module 8; Direct supply 9; Data acquisition and treating apparatus 10.
Embodiment
Embodiment
Fig. 1 illustrates, a kind of embodiment of the present utility model is, the pneumatic exciting device of a kind of noncontact, and its composition is: be made up of air pump, solenoid valve, control module, direct supply, threeway, sebific duct, tripod and union piece.
Described air pump 1 is to gas spout 4 input compressed-air controlled by solenoid valve, and the opening and closing of pulse signal property performance period that gas spout 4 reception control unit 8 controlled by solenoid valve sends, exports air pulse and encourage air spring pole 7.Pressurized air is divided into multichannel by threeway 3 by air pump 1, is connected with the gas spout 4 controlled by solenoid valve by gas circuit branch road.The gas spout 4 controlled by solenoid valve is arranged on tripod 5 by union piece 6.Control module 8 and the gas spout 4 controlled by solenoid valve are all powered by direct supply 9.After air spring pole 7 is encouraged, its dynamic respond is measured by laser displacement gauge 6.Laser displacement gauge 6 is connected with data acquisition and treating apparatus.
The described gas spout 4 controlled by solenoid valve is arranged on tripod 5 by union piece 6, tripod 5 height and direction adjustable.The gas spout 4 controlled by solenoid valve keeps certain distance with air spring pole 7 after being held up by tripod 5, and distance is not less than the peak swing after model excited target.
Described laser displacement gauge 6 is propped by support, and riding position and air spring pole 7 keep certain distance, and distance is not less than the peak swing after air spring pole 7 excited target, and does not exceed the range of laser displacement gauge 6.Laser displacement gauge 6 measures the displacement of each measuring point of air spring pole 7, is obtained the dynamic respond time-histories of air spring pole 7 by data acquisition and procession device.
This routine air pump 1 is high-pressure pump, and use 220V AC-powered, can produce high pressure air and be stored in the cylinder 2 carried, output squeezing air pressure can regulate in certain limit; When the pressurized air in cylinder 2 is due to after exporting and causing pressure to decline, air pump 1 can make an immediate response and supplement pressure gas in cylinder 2, keeps pressure in cylinder 2 to be stabilized in certain limit.Cylinder 2 and threeway 3 junction, threeway 3 and gas circuit branch road junction and gas circuit branch road and gas spout 4 junction controlled by solenoid valve all employ band and have carried out encapsulation process.
The solenoid valve of the gas spout 4 controlled by solenoid valve of this example adopts high-frequency electromagnetic valve, and operating frequency can reach more than 20Hz.The control module 8 of this example adopts programmable logic controller (PLC) (PLC), and can export high-frequency pulse signal, programmable logic controller (PLC) is by DC power supply.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (4)
1. the pneumatic exciting device of noncontact, for carrying out pneumatic exciting to flexible structures such as air spring pole, is characterized in that: form primarily of air pump, pipeline, gas spout and solenoid valve; Be connected with branch air path by gas circuit splitter by the cylinder of air pump air feed; The termination of branch air path is provided with the gas spout controlled by solenoid valve; Described solenoid valve and gas spout are wholely set, and are supported on below air spring pole by tripod; Solenoid valve and control module are electrically connected.
2. the pneumatic exciting device of noncontact according to claim 1, is characterized in that: described gas circuit splitter is at least threeway splitter.
3. the pneumatic exciting device of noncontact according to claim 1, is characterized in that: the solenoid valve of the control gas spout of employing is high-frequency electromagnetic valve, more than frequency 20Hz; Control module adopts programmable logic controller (PLC) PLC control and can export high-frequency pulse signal.
4. the pneumatic exciting device of noncontact according to claim 1, is characterized in that: described tripod height and direction adjustable; After solenoid valve is held up by tripod, keep certain distance with air spring pole, distance is not less than the peak swing after model excited target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520202656.1U CN204575293U (en) | 2015-04-07 | 2015-04-07 | The pneumatic exciting device of a kind of noncontact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520202656.1U CN204575293U (en) | 2015-04-07 | 2015-04-07 | The pneumatic exciting device of a kind of noncontact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204575293U true CN204575293U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520202656.1U Expired - Fee Related CN204575293U (en) | 2015-04-07 | 2015-04-07 | The pneumatic exciting device of a kind of noncontact |
Country Status (1)
| Country | Link |
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| CN (1) | CN204575293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776974A (en) * | 2015-04-07 | 2015-07-15 | 西南交通大学 | Non-contact pneumatic excitation device |
| CN106768830A (en) * | 2016-11-30 | 2017-05-31 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of gas pulses generator for aircraft scale model test |
| CN110865158A (en) * | 2019-12-10 | 2020-03-06 | 浙江大学 | Nondestructive testing device and method for internal quality of fruit |
-
2015
- 2015-04-07 CN CN201520202656.1U patent/CN204575293U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776974A (en) * | 2015-04-07 | 2015-07-15 | 西南交通大学 | Non-contact pneumatic excitation device |
| CN104776974B (en) * | 2015-04-07 | 2018-07-31 | 西南交通大学 | A kind of non-contact pneumatic exciting device |
| CN106768830A (en) * | 2016-11-30 | 2017-05-31 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of gas pulses generator for aircraft scale model test |
| CN110865158A (en) * | 2019-12-10 | 2020-03-06 | 浙江大学 | Nondestructive testing device and method for internal quality of fruit |
| CN110865158B (en) * | 2019-12-10 | 2023-08-18 | 浙江大学 | Nondestructive testing device and method for internal quality of fruits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150819 Termination date: 20180407 |