CN105735116A - Self-sensing bridge pier supporting base based on electrical impedance tomography technology - Google Patents
Self-sensing bridge pier supporting base based on electrical impedance tomography technology Download PDFInfo
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- CN105735116A CN105735116A CN201610137381.7A CN201610137381A CN105735116A CN 105735116 A CN105735116 A CN 105735116A CN 201610137381 A CN201610137381 A CN 201610137381A CN 105735116 A CN105735116 A CN 105735116A
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- bridge pier
- electrical impedance
- supporting base
- impedance tomography
- electrode
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- 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
- E01D19/04—Bearings; Hinges
- E01D19/041—Elastomeric bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a self-sensing bridge pier supporting base based on the electrical impedance tomography technology and belongs to the technical field of bridges. The self-sensing bridge pier supporting base comprises a supporting base body, a magnetic-sensing elastomer force bearing unit and a variable magnetic field, wherein the magnetic-sensing elastomer force bearing unit and the variable magnetic field are fixed in the supporting base body. The self-sensing bridge pier supporting base further comprises a self-sensing control system. The self-sensing control system comprises electrodes, a measuring device, a processor and a controller which communicate with one another in sequence, and the electrodes are arranged on the magnetic-sensing elastomer force bearing unit. According to the self-sensing bridge pier supporting base based on the electrical impedance tomography technology, by arranging the self-sensing control system connected with the supporting base, a supporting base assembly in vibration reduction buffering work is monitored and adjusted in real time, vibration response of the bridge pier supporting base under the impact load action is reduced, accident risks of the supporting base is effectively decreased, and accordingly the safety of a whole bridge is improved.
Description
Technical field
The invention belongs to bridge technology field, be specifically related to a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad.
Background technology
In the Aseismic Design of structural system, usually rely on increase structure self-strength or adopt passive rubber support to improve the anti-impact anti-vibration performance of system.Although passive rubber support has good anti-impact cushioning ability under general impact loading, but limited by its material when big load impacting, stiffness by itself can not be regulated intelligently and destroy to resist impulsive force, can not be changed self and damp the impact energy that dissipates, lack the compatibility of good anti-impact damping and power consumption generally, protect to the anti-impact of structural system and bring very big potential safety hazard.
Magnetic sensitive elastomer is to be filled in, by micron order ferromagnetic particle, a kind of novel intelligent material that macromolecule matrix is formed, and its modulus and damping loss factor can change with the change of externally-applied magnetic field.The bearing made by magnetic sensitive elastomer has the feature of rigidity, damping controlled, good stability simultaneously compared with passive rubber support, it is possible to be effectively improved the isolation property of system.But the real-time adjustment of magnetic sensitive elastomer bearing parameter, perception need to be realized by various sensors, then input control system, considerably increase the feedback delay of whole system, to some potential safety hazards cannot early warning in time and eliminating, add Bridge Accidents risk.
Electrical impedance tomography technology is a kind of Novel lossless imaging technique, its principle is to have different electrical impedance when different according to the different medium in object and medium, by applying, to the electrode being affixed on body surface, the voltage that electric current measurement causes, then send the magnitude of voltage obtained back to processor, rebuild the faultage image about the distribution of conductivity information within measurand according to certain image reconstruction algorithm.
Therefore, if Review of Electrical Impedance Tomography can be applied in perception self-adaption shock isolating pedestal system, the defect of above-mentioned prior art can be avoided, to the real-time adjustment realizing bearing parameter, to reducing the vibratory response of Structures Under Impulsive Loading system, ensure that structural system has safely and be of great significance.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is to avoid the problem that existing bearing cannot really realize making bridge there is security risk from perception.
It is an object of the invention to be achieved through the following technical solutions:
A kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, including support body, the magnetic sensitive elastomer load carrying unit being fixed in support body and variable magnetic field, also include controlling system from perception, described electrode, measurement apparatus, processor and the controller including from perception control system being sequentially communicated, described electrode is arranged on described magnetic sensitive elastomer load carrying unit, described controller connects with variable magnetic field, measurement apparatus input electrode electric current, measurement interelectrode voltage between two, and by information of voltage transmission to processor；Processor is according to information of voltage and utilizes Review of Electrical Impedance Tomography to rebuild the conductivity variations situation of magnetic sensitive elastomer load carrying unit, thus extrapolating bearing to be subject to impulsive force size, and sends to controller；The magnetic field that controller adjusts variable magnetic field according to impulsive force size is strong and weak, changes the modulus of magnetic sensitive elastomer load carrying unit, damping loss factor, makes the rigidity of shock isolating pedestal adapt with damping the size being subject to impulsive force with it.
Further, described support body is made up of upper cover and lower cover, and described magnetic sensitive elastomer load carrying unit includes the cylinder vibration isolation post being arranged at support body center and the annular vibration isolation post being looped around cylinder vibration isolation post periphery.
Further, described support body is made up of upper cover and lower cover, and described cylinder vibration isolation post and annular vibration isolation post are laminated by magnetic sensitive elastomer and magnetic conductive steel plate.
Further, described electrode arranges surrounding that is multiple and that be arranged in cylinder vibration isolation post magnetic sensitive elastomer uniformly.
Further, described variable magnetic field includes being fixed on the magnet exciting coil that magnetic sensitive elastomer can produce in lower cover the action of a magnetic field and the controllable electric power connected with described magnet exciting coil.
Further, described measurement apparatus includes providing the electrode supply of operating current for each electrode and appointing the electrode voltage measuring device of voltage between electrode between two for measuring.
Further, each electrode and measurement apparatus separate connection.
Further, described upper cover and lower cover all adopt steel or ferrum or magnetic conductive metal to make.
The invention has the beneficial effects as follows:
The present invention controls system by what setting was connected with bearing from perception, mounting assembly in real time vibration reduction and cushioning being worked is monitored and regulates, reduce the vibratory response of bridge pier bearing pad under impact loading, effectively reduce bearing accident risk, and then improve the safety of whole bridge.
Other advantages of the present invention, target and feature will be illustrated to a certain extent in the following description, and to a certain extent, will be apparent to those skilled in the art based on to investigating hereafter, or can be instructed from the practice of the present invention.The target of the present invention and other advantages can be realized by description below and obtain.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is the structural representation of invention.
Accompanying drawing labelling:
1-support body；2-electrode；3-measurement apparatus；4-processor；5-wire；6-data wire；7-upper cover；8-lower cover；9-cylinder vibration isolation post；10-annular vibration isolation post；11-magnetic sensitive elastomer；12-magnetic conductive steel plate；13-magnet exciting coil；14-controllable electric power；15-controller；16-electrode supply；17-electrode voltage measuring device.
Detailed description of the invention
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment is only for illustrating the present invention, rather than in order to limit the scope of the invention.
nullAs shown in Figure 1，The present embodiment a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad，Including support body 1、It is fixed on the magnetic sensitive elastomer load carrying unit in support body 1、Variable magnetic field，And from perception adaptive control system，The present embodiment include electrode 2 from perception adaptive control system、Measurement apparatus 3、Processor 4 and controller 15，Wherein，Electrode 2 is connected with measurement apparatus 3 by wire 5，Measurement apparatus 3 is connected with processor 4 by data wire 6，Processor 4 is connected with the variable power supply 14 of variable magnetic field and variable magnetic field is controlled，Electrode 2 is attached on magnetic sensitive elastomer load carrying unit，Receive the magnetic sensitive elastomer load carrying unit signal of telecommunication under various load effects，The signal of telecommunication recorded is transferred to processor 4 by measurement apparatus 3，Processor 4 reconstructs the conductivity variations situation of magnetic sensitive elastomer load carrying unit by corresponding image reconstruction algorithm，Thus extrapolating bearing to be subject to the size of impulsive force，And then controller 15 sends electric current and adjusts instruction，Make the strong and weak corresponding change in magnetic field of variable magnetic field，Thus causing the modulus of magnetic sensitive elastomer、Damping loss factor changes，Increase rigidity and the damping of shock isolating pedestal.Therefore electric current from perception impulsive force size, and can be adjusted by bearing according to impulsive force size, reaches the purpose of intelligent protection bridge pad, is greatly improved bearing or even the safety of whole bridge.
Improvement as the present embodiment, support body 1 is made up of upper cover 7 and lower cover 8, magnetic sensitive elastomer load carrying unit includes the cylinder vibration isolation post 9 being arranged at support body 1 center and the annular vibration isolation post 10 being looped around cylinder vibration isolation post 9 periphery, cylinder vibration isolation post 9 and annular vibration isolation post 10 are laminated with magnetic conductive steel plate 12 by the magnetic sensitive elastomer 11 being arranged between upper cover 7 and lower cover 8, and adopt gluing fixed fixed, when meeting with indefinite high-strength impact (such as earthquake, blast) time, it is possible to prevent the situations such as magnetic sensitive elastomer pillar generation fracture, keep its stationary state, thus ensureing the use safety of magnetosensitive rubber support self.
Improvement as the present embodiment, electrode 2 arranges multiple, and it is evenly arranged on the surrounding thickness face of arbitrary magnetic sensitive elastomer 11 on cylinder vibration isolation post 9, and arbitrary electrode 2 and measurement apparatus 3 separate connection, make each electrode 2 in parallel, the voltage arbitrarily between two between electrode can be measured, further, measurement apparatus 3 includes electrode supply 16 and electrode voltage measuring device 17, electrode supply 16 is for producing the electric current of injecting electrode, electrode voltage measuring device 17 is for measuring the voltage between any two electrode, and by data wire, the voltage data that measurement apparatus 3 records is transferred to processor.
As the improvement of the present embodiment, variable magnetic field includes being fixed in lower cover 8 magnet exciting coil 13 that all magnetic sensitive elastomer 11 can produce the action of a magnetic field and the controllable electric power 14 connected with magnet exciting coil 13.Owing to the size of current of controllable electric power 14 is adjustable, when flowing through the curent change of magnet exciting coil 13, its magnetic field intensity also changes therewith, and then regulates the Young's modulus of magnetosensitive elasticity load carrying unit.
All adopt steel or ferrum or magnetic conductive metal to make as the improvement of the present embodiment, upper cover 7 and lower cover 8.Upper cover and lower cover, as main load bearing element, not only have significantly high intensity, but also have good magnetic conductivity.
What finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent replacement, without deviating from objective and the scope of the technical program, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (8)
1. one kind based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, including support body, the magnetic sensitive elastomer load carrying unit being fixed in support body and variable magnetic field, it is characterized in that: also include controlling system from perception, described electrode, measurement apparatus, processor and the controller including from perception control system being sequentially communicated, described electrode is arranged on described magnetic sensitive elastomer load carrying unit, described controller connects with variable magnetic field, measurement apparatus input electrode electric current, measurement interelectrode voltage between two, and by information of voltage transmission to processor；Processor is according to information of voltage and utilizes Review of Electrical Impedance Tomography to rebuild the conductivity variations situation of magnetic sensitive elastomer load carrying unit, thus extrapolating bearing to be subject to impulsive force size, and sends to controller；The magnetic field that controller adjusts variable magnetic field according to impulsive force size is strong and weak, changes the modulus of magnetic sensitive elastomer load carrying unit, damping loss factor, makes the rigidity of shock isolating pedestal adapt with damping the size being subject to impulsive force with it.
2. according to claim 1 a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterised in that: described magnetic sensitive elastomer load carrying unit includes being arranged at the cylinder vibration isolation post at support body center and is looped around the annular vibration isolation post that cylinder vibration isolation post is peripheral.
3. according to claim 2 a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterized in that: described support body is made up of upper cover and lower cover, described cylinder vibration isolation post and annular vibration isolation post are laminated by the magnetic sensitive elastomer being arranged between upper cover and lower cover and magnetic conductive steel plate.
4. according to claim 3 a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterised in that: described electrode arranges surrounding that is multiple and that be arranged in cylinder vibration isolation post magnetic sensitive elastomer uniformly.
5. according to claim 2 a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterised in that: described variable magnetic field includes being fixed on the magnet exciting coil that magnetic sensitive elastomer can produce in lower cover the action of a magnetic field and the controllable electric power connected with described magnet exciting coil.
6. according to claim 1 a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterised in that: described measurement apparatus includes providing the electrode supply of operating current for each electrode and appointing the electrode voltage measuring device of voltage between electrode between two for measuring.
7. according to claim 1 a kind of based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterised in that: each electrode and measurement apparatus separate connection.
8. a kind of according to claim 1-7 based on Review of Electrical Impedance Tomography from perception bridge pier bearing pad, it is characterised in that: described upper cover and lower cover all adopt steel or ferrum or magnetic conductive metal to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610137381.7A CN105735116B (en) | 2016-03-10 | 2016-03-10 | It is a kind of that bridge pier bearing pad is perceived based on Review of Electrical Impedance Tomography certainly |
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| CN201610137381.7A CN105735116B (en) | 2016-03-10 | 2016-03-10 | It is a kind of that bridge pier bearing pad is perceived based on Review of Electrical Impedance Tomography certainly |
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| CN105735116B CN105735116B (en) | 2018-02-06 |
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Cited By (2)
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| CN107012794A (en) * | 2017-05-23 | 2017-08-04 | 义乌市雄发尔机械设备有限公司 | A kind of equipment for bridge construction |
| CN108386049A (en) * | 2018-01-08 | 2018-08-10 | 同济大学 | A kind of high building structure is from aware distributed toughness disaster prevention system |
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| CN101586641A (en) * | 2009-06-23 | 2009-11-25 | 武汉理工大学 | The laminated intelligent shock-isolation bearing capable of self-adaptively regulating cutting performance |
| CN103806569A (en) * | 2014-01-26 | 2014-05-21 | 大连理工大学 | Electro-rheological elastomer intelligent shock insulation supporting base |
| CN104499427A (en) * | 2015-01-07 | 2015-04-08 | 中国科学院合肥物质科学研究院 | Self-sensing self-adapting pier support system |
| CN104879431A (en) * | 2015-03-31 | 2015-09-02 | 大连理工大学 | Combined intelligent isolation bearing of magnetorheological elastomer |
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2016
- 2016-03-10 CN CN201610137381.7A patent/CN105735116B/en active Active
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| EP1117945B1 (en) * | 1998-10-08 | 2004-08-18 | Lord Corporation | Isolation system for isolation tables and the like |
| CN2888443Y (en) * | 2006-04-28 | 2007-04-11 | 四川大学 | Concrete damage detector based on impedance imaging |
| DE102007014161A1 (en) * | 2007-03-23 | 2008-09-25 | Jäger, Frank-Michael | Load and surface pressure measuring device, has sliding layers for transmission of forces arranged between support parts, and unit for data transmission and/or data storage, where one of support parts comprises piezoelectric sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107012794A (en) * | 2017-05-23 | 2017-08-04 | 义乌市雄发尔机械设备有限公司 | A kind of equipment for bridge construction |
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| CN108386049A (en) * | 2018-01-08 | 2018-08-10 | 同济大学 | A kind of high building structure is from aware distributed toughness disaster prevention system |
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| CN105735116B (en) | 2018-02-06 |
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