CN109412374A - SPA bridge multifrequency electromagnetic energy acquisition-damper - Google Patents
SPA bridge multifrequency electromagnetic energy acquisition-damper Download PDFInfo
- Publication number
- CN109412374A CN109412374A CN201811477736.2A CN201811477736A CN109412374A CN 109412374 A CN109412374 A CN 109412374A CN 201811477736 A CN201811477736 A CN 201811477736A CN 109412374 A CN109412374 A CN 109412374A
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- electromagnetic energy
- shell
- bridge
- mass block
- energy collection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/04—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of SPA bridge multifrequency electromagnetic energy acquisition-dampers, including shell, mutually independent cavity there are four being formed in shell, vibration component is equipped in each cavity, the intrinsic frequency of each intracorporal vibration component of chamber is not identical, vibration component includes the mass block that can freely up and down move, the spring being connected between mass block and the bottom plate of shell, at least one flatwise coil being arranged on mass block lateral wall and the bridge rectifier for being arranged at the top of mass block and being connect with the flatwise coil, the inside of each cavity is equipped with and the one-to-one permanent magnet of flatwise coil.The present invention has multiple working frequencies, and compared to existing single vibration mode, the frequency bandwidth of work increases, stability enhancing, and energy-storage property is more stable.
Description
Technical field
The invention belongs to the confession electro-technical field of bridge health monitoring more particularly to a kind of SPA bridge multifrequency electromagnetic types
Energy acquisition-damper.
Background technique
Precast segment assembly bridge (SPA bridge) is used as a kind of rapid construction bridge, in urban rail transit elevated line
Application it is more and more extensive.Compared with the bridge of the cast-in-place method construction of tradition, SPA bridge has green, energy saving, efficient excellent
Point, but due to the presence of its splicing seams, the section rigidity and useful life longevity of precast segment assembly bridge are always to be concerned
Emphasis.For the normal operation for ensuring bridge, carrying out Long Period Health Monitoring to bridge is very important.Bridge health monitoring needs
To arrange or embedded component how to provide for these pre-buried components and continue to be important with stable energy resource supply on bridge
Goal in research.
Based on background above, having a kind of research tendency both at home and abroad is by collecting bridge environment vibration or structure itself vibration
Dynamic energy will vibrate generated mechanical energy and be converted into workable electric energy, energize to pre-buried component.This power supply mode
It is influenced by collection device, efficiency is irregular.The difference of principle is collected according to device, collector mainly includes two types:
Piezoelectric type energy collector and electromagnetic energy collector.Wherein, piezoelectric type energy collector is for the more demanding of material, and
The impedance of output is big, electric current is small, and current report is about electromagnetic energy collector mostly.Electromagnetic energy collector has
The advantages of structure is simple and output off current HIGH.Electromagnetic vibration energy collector (EM-VEHs) is according to Faraday's electromagnetic induction law
Principle work.When being changed by the magnetic density of loop area, electromagnetic induction energy incudes in closed loop coil
Out.In general, EM-VEHs is made of permanent magnet, coil and spring system etc., due to vibration, magnetic pole in EM-VEHs with
There is relative motion between coil, induces electromotive force in coil.
Patent 2018101722215 discloses a kind of electromagnetic vibration energy for Bridges on Urban Rail Transit health monitoring
Collector is measured, which has high electric energy efficiency of storage, output power height, power output density high
Advantage, but the patent is the linear system of single resonance frequency, when the intrinsic frequency of external drive frequency departure apparatus structure
When rate, the response of system is by significant reduction, so the performance of device is extremely unstable.
Summary of the invention
Technical problem to be solved by the present invention lies in providing one kind to have both collection of energy and the double function of structural damping, and
The stable SPA bridge multifrequency electromagnetic energy acquisition-damper of performance.
In order to solve the above technical problems, the application adopts the following technical scheme that
A kind of electromagnetic energy collection-damper for SPA bridge, including shell, there are four the interior formation of the shell
Mutually independent cavity is equipped with vibration component, the intrinsic frequency of each intracorporal vibration component of chamber in each cavity
Not identical, the vibration component includes the mass block that can freely up and down move, the bottom for being connected to the mass block Yu the shell
Spring between plate, at least one flatwise coil being arranged on the mass block lateral wall and it is arranged on the mass block top
Portion and the bridge rectifier connecting with the flatwise coil, the inside of each cavity are equipped with a pair of with the flatwise coil one
The permanent magnet answered.
Further, more struts, the upper end of the strut and the shell are also vertically arranged in each cavity
The top of body connects, and lower end is welded on the bottom plate of the shell, and the mass block is slidably installed on the strut, the spring
It is set in the lower end of the strut.
Further, the permanent magnet uses residual flux density for the samarium cobalt permanent magnet iron of 1.0-1.2T.
Further, the shell is separated into four mutually independent cavitys by two partitions being arranged in a crisscross manner.
Further, the number of plies of the flatwise coil is 190-210 layers, and every layer the number of turns is 90-100 circle.
Further, the spacing of the corresponding permanent magnet of the flatwise coil is 2.5-3.5mm.
Further, the intrinsic frequency of the vibration component is 3Hz-9Hz.
Further, the intrinsic frequency of four vibration components is respectively 3Hz-4.5Hz, 4.5Hz-6.5Hz, 6.5Hz-
8Hz and 8Hz-9Hz.
1, the present invention has multiple working frequencies, and compared to existing single vibration mode, the frequency bandwidth of work increases, surely
Qualitative enhancing, energy-storage property are more stable.
2, damper can with bridge constitute son-main structure vibration damping system, for bridge structure there are about
The damping effect of 10%-20%, the vibration characteristics of change bridge structure that can be more significant improve the steady of vehicle operation
Property, the purpose of damping noise reduction is played, collection of energy and the double function of structural damping are had both.
3, coil and permanent magnet are using circulating type laying form, and coil is to be attached on the side wall of mass block, permanent magnet cloth
Be located on the side wall of cavity, it is all bigger by the magnetic flux and variation rate of magnetic flux of coil, and winding wire diameter, the number of turns and
The number of plies can design smaller；In addition, compared with patent 2018101722215, in the quality of single vibration component, magnet and line
In the case that circle size reduces, efficiency of energy collection goes up not down.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is schematic top plan view of the invention；
Fig. 3 is the structural schematic diagram that the present invention is mounted on bridge；
Fig. 4 is the output power under four kinds of working frequencies of the invention；
Fig. 5 is damping effect schematic diagram of the present invention to track Board position；
Fig. 6 is damping effect schematic diagram of the present invention to beam body position.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1 and Fig. 2, a kind of SPA bridge multifrequency electromagnetic energy acquisition-damper, for the health on SPA bridge
Monitoring element power supply, including shell 1, shell 1 pass through two partitions 2 being arranged in a crisscross manner and are separated into four mutually independent cavitys
3, vibration component is equipped in each cavity 3, and the intrinsic frequency of each intracorporal vibration component of chamber is not identical, and vibration component includes can
The mass block 4 that freely up and down moves, the spring 5 being connected between mass block 4 and the bottom plate of shell 1, setting are in 4 outside of mass block
At least one flatwise coil 6 on wall and the bridge rectifier 7 that 4 top of mass block is set and is connect with flatwise coil 6, respectively
The inside of cavity 3 be equipped with the one-to-one permanent magnet 8 of flatwise coil 6, shell 1 be equipped with external plug 9, bridge rectifier
7 are electrically connected by flexible disk conducting wire 10 with external plug 9, in use, health monitoring element and external plug 9 are electrically connected,
It is powered by electromagnetic energy collection-damper for it.
The present embodiment course of work is as follows: when receiving external vibration excitation, mass block 4 drives about 6 flatwise coil
Mobile, coil and permanent magnet 8 generate relative motion and cutting magnetic line, induce electromotive force in coil and pass through bridge rectifier
It exports after 7 rectifications to health monitoring element.Electromagnetic energy collection-damper is the micro- electric and magnetic oscillation of multifrequency or broadband in this implementation
Energy harvester can effectively collect energy from different vibration peaks, by the job stability of effective solving device, 4
Vibration component corresponds to 4 kinds of different vibration modes, and each pattern has oneself specific working frequency, then 4 kinds of frequencies can answer
The case where extraneous ambient vibration may be changed, if then have when the external drive frequency departure intrinsic frequency of one mode
It may be close with the intrinsic frequency of another mode, compared to existing single vibration mode, the frequency bandwidth of work increases, and stablizes
Property enhancing, energy-storage property is more stable.In addition, coil and permanent magnet lay form using circulating type, coil is to be attached to mass block 4
Side wall on, permanent magnet 8 is laid on the side wall of cavity 3, all bigger by the magnetic flux and variation rate of magnetic flux of coil, and
Winding wire diameter, the number of turns and the number of plies can design smaller.
More struts 11 are also vertically arranged in each cavity 3, the upper end of strut 11 is connect with the top of shell 1,
Lower end is welded on the bottom plate of shell 1, and mass block 4 is slidably installed on strut 11, and spring 5 is set in the lower end of strut 11, mass block 4
It is oriented to by strut 11.
Preferably, permanent magnet 8 uses residual flux density for the samarium cobalt permanent magnet iron of 1.0-1.2T, compares alnico magnet, magnetic
It is stronger with coercivity, also it is not easy to demagnetize, the vibration of 10g and the impact of 100g can be born without demagnetizing.
More are equipped on the bottom plate of shell 1 for electromagnetic energy collection-damper to be fixed on bridge structure
Bolt 12.
Specifically, shell 1 and partition 2 use PC plastic plate, shell 1 is with a thickness of 1cm, partition thickness 0.5cm；It is every in shell 1
Fix 2 samarium cobalt permanent magnet iron on a inner sidewall, the size of each permanent magnet 8 be length × width x thickness=0.16m × 0.08m ×
0.05m；Enclosure interior is divided into four regions by partition 2, and it is 11343.7kg/m3 lead matter mass block that, which there is a density in each region,
Be spring 5 below mass block, the metal vaulting pole for being 4 radius 3cm across spring 5 and mass block 4, lead top side have one it is single-phase
Bridge rectification device and coiled wires, to export the electric energy of storage；Copper coil, coil are fixed in the outermost two sides of lead
Radius r=0.1mm shares 200 layers, and every layer of 100 circle, the size of innermost layer coil is 0.12m × 0.25m, coil and permanent magnet
The gap width d=3mm on surface.
It is a kind of that shock-dampening method being carried out to SPA bridge using above-mentioned electromagnetic energy collection-damper referring to Fig. 3-Fig. 6, it should
SPA bridge includes box beam 13 and the track plates that are arranged in box beam 13 and are arranged symmetrically using box beam axis longitudinal section as the plane of symmetry
14, include the following steps:
Step 1: by vibration measurement instrument to vehicle by SPA bridge when vibration frequency be acquired, to the number of acquisition
According to spectrum analysis is carried out, the amplitude of spectrum analysis medium wave peak is in the preceding four high corresponding frequencies of four wave crests, as excitation
The contribution frequency in source；
The determination of the frequency of external source needs to carry out spectrum analysis to vibration source, due to Bridges on Urban Rail Transit
It is overpass mostly, pier is high and very thin, and beam body is mostly etc., and height concrete box girder, span are about 40m or so, for above-mentioned bridge
Beam, the principal element for causing it to vibrate is exactly train by causing the vibration of beam body, and vibrating is low frequency (1-40Hz) low acceleration
The vibration of (0.01-3.8g) agrees with the work characteristics of electromagnetic vibration energy collector very much.When a column Type B railcar with
When main track speed of service 120km/h at the uniform velocity passes through bridge, it will cause bridge vibration of beam, the spectrum analysis of vibration source such as Fig. 3 institute
Show.When bridge type variation is little and train running speed is constant, spectrum analysis is substantially unchanged.
Analysis it is found that several main contributions frequencies of driving source vibration be 3.76,5.57,6.45Hz and 8.69Hz, range
Between 3-9Hz, when the groundwork frequency of damper is equal with more than, energy storage efficiency is best, according to device internal vibration
Relationship between the intrinsic frequency three of quality, the global stiffness of spring assembly and energy harvester, adjusts the rigidity of spring, i.e.,
ki=ωni 2·mi=(2 π fi)2mi(i=1,2,3,4)
Wherein, k is spring rate, and m is the quality of vibration module, and f is the working frequency of module.
Step 2: adjustment vibration component in spring rigidity so that the intrinsic frequency of four vibration components respectively with it is above-mentioned
Four contribution frequencies are equal；
Step 3: electromagnetic energy collection-damper is fixedly mounted in bridge span and is close to 14 outside position of track plates
It sets place and is electrically connected by the health monitoring element (not shown) on bridge rectifier and bridge, electromagnetic energy is received
Collection-damper quality/beam body+track plates quality >=1%.
The present embodiment electromagnetic energy collection-damper and existing electromagnetic vibration energy collector frequency acquisition, output
The correlation data of power, power density and volume is as shown in table 1.The present embodiment can guarantee have always as can be drawn from Table 1
One vibration component efficient operation, and the vibration component charge storage ability of efficient operation is eager to excel than the ability of most of existing devices,
While guaranteeing energy storage stability, energy storage efficiency is in turn ensured.
1 energy storage Contrast on effect of table
[1]A hybrid energy harvesting topology for human-powered mobile
electronics[C],34th Annual Conference of IEEE Industrial Electronics,Orlando,
448–453.
[2]An energy harvesting system using the wind-induced vibration of a
stay cable for powering a wireless sensor node[J],Smart Material and
Structures,20:1-9,2011.
[3]Self-powered sensors for monitoring of highway bridges[J],Sensors
Journal,IEEE,9:1422-1429,2009.
[4]Harvesting traffic induced vibrations for structural health
monitoring of bridges[J],Micromechanics and Microengineering,21:1-13,2011.
[5]Micro power generator for harvesting low-frequency and nonperiodic
vibrations[J],Journal of Microelectromechanical Systems,vol.20,no.4,pp.852–
866,2011.
[6]Energy harvesting from wind-induced vibration of suspension
bridges[M.S.thesis],Department of Civil and Environmental,Massachusetts
Institute of Technology,2013.
[7]Analysis of piezoelectric energy harvesting for bridge health
monitoring systems[M.S.thesis],Computational Engineering Centre,School of
Engineering,University of Swansea,Wales,UK,2010.
[8]Energy harvesting on highway bridges,Final ReportFHWA-OK-11-01,
2011.
[9]A dual-function electromagnetic damper for bridge stay cable
vibration mitigation and energy harvesting,in Proceedings of the 13th East
Asia-Pacific Conference on Structural Engineering and Construction(EASEC’13),
Sapporo,Japan,September 2013.
Table 2 shows the damping data using this implementation damping to bridge, from table 2 it can be seen that the present embodiment damper
Son-main structure vibration damping system can be constituted with bridge, there are about the damping of 10%-20% effects for bridge structure
Fruit, the vibration characteristics of change bridge structure that can be more significant, improves vehicle traveling comfort, plays the mesh of damping noise reduction
, have both collection of energy and the double function of structural damping.
The analysis of 2 damping effect of table
Above-described embodiment is only to clearly demonstrate examples made by the present invention, rather than the restriction to embodiment.For
For those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.Here without can not be also exhaustive to all embodiments.And the obvious variation or change thus amplified out
It is dynamic to be still in the protection scope of this invention.
Claims (9)
1. a kind of SPA bridge multifrequency electromagnetic energy acquisition-damper, including shell, it is characterised in that: formed in the shell
There are four mutually independent cavity, it is equipped with vibration component in each cavity, each intracorporal vibration component of chamber is consolidated
Have that frequency is not identical, the vibration component includes the mass block that can freely up and down move, is connected to the mass block and the shell
Spring between the bottom plate of body, at least one flatwise coil being arranged on the mass block lateral wall and it is arranged in the matter
The inside of the bridge rectifier connecting at the top of gauge block and with the flatwise coil, each cavity is equipped with and the flatwise coil
One-to-one permanent magnet.
2. electromagnetic energy collection-damper according to claim 1, it is characterised in that: in each cavity also
More struts are vertically arranged with, the upper end of the strut is connect with the top of the shell, and lower end is welded on the shell
On bottom plate, the mass block is slidably installed on the strut, and the spring is set in the lower end of the strut.
3. electromagnetic energy collection-damper according to claim 1, it is characterised in that: the permanent magnet uses remanent magnetism
Density is the samarium cobalt permanent magnet iron of 1.0-1.2T.
4. electromagnetic energy collection-damper according to claim 1, it is characterised in that: the shell by handing in length and breadth
Two partitions of mistake setting are separated into four mutually independent cavitys.
5. electromagnetic energy collection-damper according to claim 1, it is characterised in that: the number of plies of the flatwise coil
It is 190-210 layers, every layer the number of turns is 90-100 circle.
6. electromagnetic energy collection-damper according to claim 1, it is characterised in that: the flatwise coil is right with it
The spacing for the permanent magnet answered is 2.5-3.5mm.
7. electromagnetic energy collection-damper according to claim 1, it is characterised in that: the vibration component it is intrinsic
Frequency is 3Hz-9Hz.
8. electromagnetic energy collection-damper according to claim 7, it is characterised in that: four vibration components
Intrinsic frequency is respectively 3Hz-4.5Hz, 4.5Hz-6.5Hz, 6.5Hz-8Hz and 8Hz-9Hz.
9. electromagnetic energy collection-damper according to claim 1, it is characterised in that: worn on the bottom plate of the shell
Equipped with more for the electromagnetic energy collection-damper to be fixed on the bolt in bridge structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477736.2A CN109412374B (en) | 2018-12-05 | 2018-12-05 | Method for damping SPA bridge by using electromagnetic energy acquisition-damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477736.2A CN109412374B (en) | 2018-12-05 | 2018-12-05 | Method for damping SPA bridge by using electromagnetic energy acquisition-damper |
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| Publication Number | Publication Date |
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| CN109412374A true CN109412374A (en) | 2019-03-01 |
| CN109412374B CN109412374B (en) | 2020-07-21 |
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| CN201811477736.2A Active CN109412374B (en) | 2018-12-05 | 2018-12-05 | Method for damping SPA bridge by using electromagnetic energy acquisition-damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113676017A (en) * | 2021-08-26 | 2021-11-19 | 中国科学院宁波材料技术与工程研究所 | Permanent magnet double-suspension type magnetic liquid kinetic energy collector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2173478Y (en) * | 1993-08-06 | 1994-08-03 | 田悟同 | Straight line generator |
| CN201018391Y (en) * | 2007-02-13 | 2008-02-06 | 史艳冰 | Returning force generator |
| CN101202491A (en) * | 2006-12-11 | 2008-06-18 | 谭晛 | Vibrator wave power generator |
| CN106329873A (en) * | 2016-09-30 | 2017-01-11 | 吉林大学 | Multi-frequency vibration energy recycling device |
| CN206041775U (en) * | 2016-09-30 | 2017-03-22 | 吉林大学 | Multi -frequency vibration energy recovery unit |
-
2018
- 2018-12-05 CN CN201811477736.2A patent/CN109412374B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2173478Y (en) * | 1993-08-06 | 1994-08-03 | 田悟同 | Straight line generator |
| CN101202491A (en) * | 2006-12-11 | 2008-06-18 | 谭晛 | Vibrator wave power generator |
| CN201018391Y (en) * | 2007-02-13 | 2008-02-06 | 史艳冰 | Returning force generator |
| CN106329873A (en) * | 2016-09-30 | 2017-01-11 | 吉林大学 | Multi-frequency vibration energy recycling device |
| CN206041775U (en) * | 2016-09-30 | 2017-03-22 | 吉林大学 | Multi -frequency vibration energy recovery unit |
Non-Patent Citations (1)
| Title |
|---|
| 曹自平: "环境能量采集技术的研究现状及发展趋势", 《南京邮电大学学报（自然科学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113676017A (en) * | 2021-08-26 | 2021-11-19 | 中国科学院宁波材料技术与工程研究所 | Permanent magnet double-suspension type magnetic liquid kinetic energy collector |
| CN113676017B (en) * | 2021-08-26 | 2022-08-05 | 中国科学院宁波材料技术与工程研究所 | Permanent magnet double-suspension type magnetic liquid kinetic energy collector |
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