CN105606710A - Portable sensor clamp applied to smart reinforcing steel bars - Google Patents
Portable sensor clamp applied to smart reinforcing steel bars Download PDFInfo
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- CN105606710A CN105606710A CN201510996291.9A CN201510996291A CN105606710A CN 105606710 A CN105606710 A CN 105606710A CN 201510996291 A CN201510996291 A CN 201510996291A CN 105606710 A CN105606710 A CN 105606710A
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- reinforcing bar
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- hold assembly
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention provides a portable sensor clamp applied to smart reinforcing steel bars. The portable sensor clamp comprises a pair of clamping components which are spliced together to form a through cylindrical structure, wherein a through part of the cylindrical structure is of a cylinder shape and is used for completely fitting to the reinforcing steel bars; the middle sectional shape of the cylindrical structure is a regular polygon; a piezoelectric ceramic sensor is directly clung to each edge of the regular polygon; the piezoelectric ceramic sensor motivates stress waves, the stress waves are transmitted to the fitted reinforcing steel bars through a clamp in charge of motivating a signal, and are then received by the piezoelectric ceramic sensor on a clamp in charge of receiving the signal, and the occurrence of damage is analyzed by waveform variation analysis. The portable sensor clamp provided by the invention is relatively small in size, and can be produced in batches; piezoelectric ceramic crystals are adhered inside the clamp in advance, such that not only can the influences, such as short-circuiting be avoided, but also the on-site manufacturing burden of the smart reinforcing steel bars is alleviated; the fitted reinforcing steel bars are simple in manufacturing process and circular in sectional surfaces; the clamp has the capabilities of ensuring the monitoring quality and greatly reducing the complexity of on-site manufacturing.
Description
Technical field
The present invention relates to reinforced concrete structure health monitoring, xoncrete structure internal injury is carried out to Real-time Feedback, particularly, relate to a kind of portable clamp of sensor that is applied to intelligent reinforcing bar.
Background technology
Concrete steel building being carried out to regular health monitoring, and after catastrophe, crucial building is carried out to structural safety detection and assessment in time, is an important task. Conventional comprises ultrasonic Detection Method to damages of concrete structures detection method, impact elasticity ripple method, and acoustic emission detection method, photography detection method, sensor apparatus detection method and optical fiber sensing network detection method etc., these methods need testing staff's detection of being in the action. Ultrasonic Detection Method result is more accurate, but is easily subject to environmental limitations; Impact elasticity ripple method can only extension of detecting capability direction and surface meet at right angles, there is no the simple crack of branch; Acoustic emission detection method can only detect occurent crack, but can detect size, kind and the position in crack; Photography detection method can only detect surperficial crack; Can there is undetected situation because of the randomness that crack occurs in sensor apparatus detection method; Optical fiber sensing network detection method can because the mechanical property of optical fiber compared with weak and be restricted. Simultaneously because this type of structural volume is huge, covering or being difficult to of crucial carrying position or decorated wall etc. is approaching, for example beam, post and node thereof or the pile of bottom etc. of structure, this makes above-mentioned detection method be difficult to carry out, and especially after the calamities such as earthquake, flood or tsunami, works has under the state of damage.
Method based on guiding stress wave (GuidedStressWave) is to survey the defect in surrounding structure by relay ultrasonic stress wave on carrier. " intelligent reinforcing bar based on piezoceramics crystal and preparation method thereof " (Chinese patent that application number is 201310330514.9) that Wu Fan proposes, narrow frequency guiding stress wave is loaded on to the intelligent reinforcing bar of PZT type, amplitude change can use waveform scattering mutation and ripple time, the local damage of prediction xoncrete structure, as crack and de-muscle etc., but also can predict the size and Orientation in crack etc.; This system, as a part for material, can be installed in xoncrete structure inside; As active control system, can excite when needed and Information Monitoring. But this intelligent reinforcing bar need to carry out complex cuts at rebar surface in the time making, Wei Zhengba limit, its cross section type, this kind of manufacturing process cannot realize in constructing at the scene in a large number, and difficult quality guarantee; Aspect stickup piezoceramics crystal, need to coordinate conduction containing silver epoxy and superior making, otherwise can produce the impacts such as short circuit simultaneously, cannot realize non-destructive monitoring; If reinforcing bar is longer, the difficulty that can increase cutting and paste sensor, and the reinforcing bar of this kind of situation cannot be prefabricated.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of portable clamp of sensor that is applied to intelligent reinforcing bar and preparation method thereof, described fixture is identical with reinforcing bar material, when site operation, can knock in adaptive reinforcing bar; Wherein grip size is less, can be mass; Piezoceramics crystal can be sticked on to fixture inside in advance, both can avoid the impacts such as short circuit, alleviate again intelligent reinforcing bar field fabrication burden simultaneously; Its adaptive reinforcement fabrication technique is simple, and cross section is circle; This fixture can ensure monitoring quality, and significantly reduces field fabrication complexity.
For realizing above object, the invention provides a kind of portable clamp of sensor that is applied to intelligent reinforcing bar, comprise a pair of hold assembly, logical tubular structure during a pair of hold assembly is stitched together and forms, wherein: in tubular structure, logical part is cylindrical shape, for the adaptive reinforcing bar of fitting completely, increase the operability of site operation; The middle part cross sectional shape of tubular structure is regular polygon, and piezoceramic transducer number is identical with the limit number of regular polygon, and piezoceramic transducer is directly attached on every limit of regular polygon and to be positioned at tubular structure middle part inner.
Preferably, described portable clamp of sensor both can elastic stress wave signal, can receive again stress wave signal, piezoceramic transducer elastic stress wave, be passed to adaptive reinforcing bar by hold assembly, accept stress wave, the generation damaging by wave form varies analysis by the piezoceramic transducer receiving on signal fixture again.
Preferably; on every limit of described regular polygon, paste after piezoceramic transducer; the lateral perimeter that multiple piezoceramic transducers surround is less than the lateral perimeter of described tubular structure, in the time of adaptive reinforcing bar real work, avoids damage for the protection of piezoceramic transducer.
Preferably, the utilization of described piezoceramics crystal sensor sticks on every limit of described regular polygon containing silver epoxy.
Preferably, there is chamfering at the two ends up and down of described tubular structure, make clamp-shaped more mellow and fuller, in order to increase signal transmission; It is relevant that the chamfering number of degrees and signal are accepted intensity. This angle can design as required, such as chamfering is 45 °.
Preferably, the middle part cross sectional shape of described tubular structure is octagon, coordinates eight piezoceramic transducers; Eight piezoceramic transducers are directly attached on every limit of octagon, and it is inner to be positioned at tubular structure middle part.
Preferably, described hold assembly is knocked in adaptive reinforcing bar, uses metal-to-metal adhesive to spread upon the contact portion of hold assembly and adaptive reinforcing bar simultaneously, to increase the degree of coupling between hold assembly and adaptive reinforcing bar, and tension vulnerable area while simultaneously alleviating adaptive reinforcing work.
Preferably, described hold assembly uses in pairs, and amalgamation logical cylinder tubular structure in together forming, in order to coordinate the adaptive reinforcing bar after polishing.
Compared with prior art, the present invention has following beneficial effect:
1) grip size of the present invention is less, relevant with the piezoceramic transducer size coordinating, and can be mass, and has higher operability;
2) fixture of the present invention can ensure reinforcing bar integrality, can ensure again signal transmission quality;
3) fixture of the present invention can be easily installed on adaptive reinforcing bar, alleviates field fabrication burden;
4) the adaptive reinforcing bar field fabrication technique of fixture of the present invention is simple, the intelligent reinforcement fabrication quality of fine guarantee.
Brief description of the drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the structural representation of hold assembly in one embodiment of the invention;
Fig. 2 is the structural representation of a pair of hold assembly amalgamation in one embodiment of the invention;
Fig. 3 is the structural representation of fixture and adaptive reinforcing bar assembling in one embodiment of the invention;
Fig. 4 is one embodiment of the invention experimental result picture;
In figure: hold assembly 1,2, piezoceramic transducer 3, containing silver epoxy 4, adaptive reinforcing bar 5.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail. Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention. It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement. These all belong to protection scope of the present invention.
As shown in Figure 1-2, a kind of portable clamp of sensor that is applied to intelligent reinforcing bar, comprise hold assembly 1, hold assembly 2, piezoceramics crystal sensor 3, contain silver epoxy 4, wherein: logical tubular structure during hold assembly 1, hold assembly 2 are stitched together and form, in tubular structure, logical part is cylindrical shape, for the adaptive reinforcing bar 5 of fitting completely; The cross section, middle part of tubular structure is octagon, coordinates eight piezoceramic transducers 3; Piezoceramic transducer 3 utilizes the inside that sticks on hold assembly 1, hold assembly 2 containing silver epoxy 4. Certainly, in other embodiments, the cross section, middle part of tubular structure can be also other regular polygons, piezoceramic transducer 3 numbers that coordinate are identical with regular polygon limit number, number of probes can affect received signal strength, piezoceramic transducer 3 is directly attached on every limit of regular polygon, and it is inner to be positioned at tubular structure middle part.
Described hold assembly 1 is knocked in adaptive reinforcing bar 5 with hold assembly 2, hold assembly 1, hold assembly 2 use the metal adhesives such as AB glue with the contact-making surface of adaptive reinforcing bar 5, to increase the degree of coupling between fixture and adaptive reinforcing bar, tension vulnerable area while simultaneously alleviating adaptive reinforcing work reduces field fabrication flow process simultaneously.
Described hold assembly 1, hold assembly 2 are identical with adaptive reinforcing bar 5 materials, and its length is that 19mm, internal diameter are 16mm, cross section external diameter 22mm, edge external diameter 19mm.
Described hold assembly 1, hold assembly 2 use in pairs, logical cylinder tubular structure during hold assembly 1,2 amalgamations form together, amalgamation good the edge at tubular structure two ends have chamfering, make clamp-shaped more mellow and fuller, in order to increase signal transmission.
On every limit of described octagon, paste after piezoceramic transducer, the lateral perimeter that eight piezoceramic transducers surround is less than the lateral perimeter of described tubular structure, in the time of adaptive reinforcing bar real work, avoids damage for the protection of piezoceramic transducer.
Amalgamation hold assembly 1, hold assembly 2 cross sections, middle part are together that the length of side is 7.5mm octagon, hold assembly 1, hold assembly 2 intermediate groove axial lengths are 7mm, be the rectangle that the every one side of central slot is 7.5mm*7mm, coordinate the piezoceramic transducer 3 of 6.6mm*6.6mm to use. Piezoceramic transducer 3 use stick on hold assembly 1, hold assembly 2 inside grooves containing silver epoxy 4, ensure the negative pole of piezoceramic transducer 3 and the hold assembly of metal material 1, hold assembly 2 conductings; The positive pole of eight piezoceramic transducers 3 combines conducting together with wire, and the present embodiment uses conductive copper adhesive tape, and in other embodiments, method of attachment is not limited to this. Piezoceramic transducer 3 in hold assembly 1, hold assembly 2 grooves is filled with non-conductive binding agents such as AB glue with the gap of hold assembly 1, hold assembly 2, at utmost utilizes its deformation energy.
The adaptive reinforcing bar using together with fixture of the present invention, for the Ribbed Bar that surface finish is crossed, polishing length is identical with fixture length, and polishing part internal diameter is identical with fixture internal diameter, thereby ensure the integrality of whole adaptive reinforcing bar, described fixture has the effect that reinforcing bar is strangled simultaneously. In one embodiment, described adaptive reinforcing bar 5 is polished to by regular reinforcement, polishing length is 19mm, polishing partial cross section is circular, its diameter is 16mm, identical with hold assembly 1, hold assembly 2 internal diameters, realizes tight fit, can ensure the integrality of whole adaptive reinforcing bar, fixture has the effect that reinforcing bar is strangled simultaneously; The hold assembly 1, the hold assembly 2 that paste piezoceramic transducer 3 are knocked in adaptive reinforcing bar 5 by rubber hammer, and hold assembly 1, hold assembly 2 increase its coupling with the contact-making surface of adaptive reinforcing bar 5 with binding agents such as AB glue, and concrete form as shown in Figure 3.
On same adaptive reinforcing bar 5, two places are installed and state clamp of sensor, two clamp of sensor interval 40mm, the piezoceramic transducer 3 on one group of clamp of sensor is responsible for pumping signal, and another group receives signal; Excitation center frequency is the instantaneous narrow frequency signal of telecommunication of five crests of 75KHz, and amplitude is ± 10V.
The first filtering of output signal receives signal by oscillograph again, and as shown in Figure 4, receiving-end voltage signal Mintrop wave is ± 5V left and right experimental result, and waveform is complete. This effectiveness is enough to detect concrete damage. By in these adaptive reinforcing bar 5 Transducers Embedded in Concretes, can judge near the concrete health status of adaptive reinforcing bar 5 according to wave form varies.
The present invention is not limited to above-mentioned implementation example, and as the change of hold assembly 1, hold assembly 2 geomeries, the selection of adhesive all can affect the efficiency of transmission of final signal.
Described hold assembly 1, hold assembly 2 or overall portable clamp of sensor can be prefabricated, can greatly reduce site operation trouble, increase the convenience of intelligent reinforcement fabrication; Described adaptive reinforcement fabrication is easy, and workmen can easily grasp now, and can ensure its making quality; Described portable clamp of sensor effectiveness is higher, almost identical with traditional intelligence reinforcing bar efficiency of transmission, but its field fabrication flow process is simple, and quality is to ensure.
Grip size of the present invention is less, and concrete size is relevant with the piezoceramic transducer of cooperation, and fixture can be prefabricated in advance, batch production; Piezoceramics crystal sensor can utilize containing silver epoxy and stick on hold assembly inside, can better ensure intelligent reinforcement fabrication quality; While construction at the scene, intelligent reinforcing bar Portable clamp can be knocked in adaptive reinforcing bar, reduces field fabrication flow process. The present invention can significantly reduce intelligent reinforcing bar field fabrication link, can ensure well again intelligent steel bar quality simultaneously, and reinforced concrete structure is carried out to damage monitoring.
Above specific embodiments of the invention are described. It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. a portable clamp of sensor that is applied to intelligent reinforcing bar, is characterized in that, comprises a pair of hold assembly, oneTo hold assembly be stitched together form in logical tubular structure, wherein: in tubular structure, logical part is cylindrical shape,For the adaptive reinforcing bar of fitting completely; The middle part cross sectional shape of tubular structure is regular polygon, piezoceramic transducer number withThe limit number of regular polygon is identical, and piezoceramic transducer is directly attached on every limit of regular polygon, and piezoelectric ceramics sensingIt is inner that device is positioned at tubular structure middle part.
2. a kind of portable clamp of sensor that is applied to intelligent reinforcing bar according to claim 1, is characterized in that,On every limit of described regular polygon, paste after piezoceramic transducer the lateral perimeter that multiple piezoceramic transducers surroundBe less than the lateral perimeter of described tubular structure, in the time of adaptive reinforcing bar real work, avoid damaging for the protection of piezoceramic transducerWound.
3. a kind of portable clamp of sensor that is applied to intelligent reinforcing bar according to claim 2, is characterized in that,The utilization of described piezoceramics crystal sensor sticks on every limit of described regular polygon containing silver epoxy.
4. a kind of portable clamp of sensor that is applied to intelligent reinforcing bar according to claim 1, is characterized in that,There is chamfering at the two ends up and down of described tubular structure, make clamp-shaped more mellow and fuller, in order to increase signal transmission; The chamfering number of degreesTo accept intensity relevant with signal.
5. a kind of portable clamp of sensor that is applied to intelligent reinforcing bar according to claim 5, is characterized in that,Described chamfering is 45 °.
6. according to a kind of portable clamp of sensor that is applied to intelligent reinforcing bar described in claim 1-5 any one, its spyLevy and be, the middle part cross sectional shape of described tubular structure is octagon, coordinates eight piezoceramic transducers; Eight pressuresElectroceramics sensor is directly attached on every limit of octagon, and it is inner to be positioned at tubular structure middle part.
7. according to a kind of portable clamp of sensor that is applied to intelligent reinforcing bar described in claim 1-5 any one, its spyLevy and be, described hold assembly is knocked in adaptive reinforcing bar, uses metal-to-metal adhesive to spread upon hold assembly and adaptive reinforcing bar simultaneouslyContact portion, to increase the degree of coupling between hold assembly and adaptive reinforcing bar, tension while alleviating adaptive reinforcing work simultaneouslyVulnerable area.
8. according to a kind of portable clamp of sensor that is applied to intelligent reinforcing bar described in claim 1-5 any one, its spyLevy and be, described portable clamp of sensor, can elastic stress wave signal, can receive again stress wave signal: piezoelectric ceramicsSensor elastic stress wave, is passed to adaptive reinforcing bar by hold assembly, then by the piezoelectric ceramics sensing receiving on signal fixtureDevice is accepted stress wave, the generation damaging by wave form varies analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996291.9A CN105606710B (en) | 2015-12-25 | 2015-12-25 | Portable sensor fixture applied to intelligent reinforcing bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996291.9A CN105606710B (en) | 2015-12-25 | 2015-12-25 | Portable sensor fixture applied to intelligent reinforcing bar |
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| Publication Number | Publication Date |
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| CN105606710A true CN105606710A (en) | 2016-05-25 |
| CN105606710B CN105606710B (en) | 2018-12-18 |
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| CN201510996291.9A Expired - Fee Related CN105606710B (en) | 2015-12-25 | 2015-12-25 | Portable sensor fixture applied to intelligent reinforcing bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168604A (en) * | 2016-08-04 | 2016-11-30 | 上海交通大学 | The monitoring method of a kind of concrete slab interlayer straight joint and device |
| TWI805143B (en) * | 2021-12-21 | 2023-06-11 | 建國科技大學 | A hands-free mobile device capable of closely attaching sensing probes of stress wave to iron objects |
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| CN201223881Y (en) * | 2008-06-25 | 2009-04-22 | 程晔 | Apparatus for measuring tensioning force of fine rolling screw-thread steel |
| US20120167487A1 (en) * | 2010-12-20 | 2012-07-05 | Fluor Technologies Corporation | Locatable and embeddable anchor point covers |
| US20120242426A1 (en) * | 2011-03-24 | 2012-09-27 | Etegent Technologies Ltd. | Broadband waveguide |
| CN103388378A (en) * | 2013-07-31 | 2013-11-13 | 上海交通大学 | Intelligent reinforcing steel bar based on piezoelectric ceramic crystal and fabrication method thereof |
| CN204531406U (en) * | 2015-04-16 | 2015-08-05 | 重庆科技学院 | A kind of device of reserved resistance strain gage paste position |
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2015
- 2015-12-25 CN CN201510996291.9A patent/CN105606710B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1266182A (en) * | 2000-04-05 | 2000-09-13 | 深圳职业技术学院 | Method for testing working stress of buildings structure in situ |
| CN201223881Y (en) * | 2008-06-25 | 2009-04-22 | 程晔 | Apparatus for measuring tensioning force of fine rolling screw-thread steel |
| US20120167487A1 (en) * | 2010-12-20 | 2012-07-05 | Fluor Technologies Corporation | Locatable and embeddable anchor point covers |
| US20120242426A1 (en) * | 2011-03-24 | 2012-09-27 | Etegent Technologies Ltd. | Broadband waveguide |
| CN103388378A (en) * | 2013-07-31 | 2013-11-13 | 上海交通大学 | Intelligent reinforcing steel bar based on piezoelectric ceramic crystal and fabrication method thereof |
| CN204531406U (en) * | 2015-04-16 | 2015-08-05 | 重庆科技学院 | A kind of device of reserved resistance strain gage paste position |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168604A (en) * | 2016-08-04 | 2016-11-30 | 上海交通大学 | The monitoring method of a kind of concrete slab interlayer straight joint and device |
| TWI805143B (en) * | 2021-12-21 | 2023-06-11 | 建國科技大學 | A hands-free mobile device capable of closely attaching sensing probes of stress wave to iron objects |
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| CN105606710B (en) | 2018-12-18 |
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Granted publication date: 20181218 Termination date: 20211225 |