CN105891331A - Concrete structure defect online positioning method based on tubular piezoelectric intelligent aggregate - Google Patents
Concrete structure defect online positioning method based on tubular piezoelectric intelligent aggregate Download PDFInfo
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- CN105891331A CN105891331A CN201610203541.3A CN201610203541A CN105891331A CN 105891331 A CN105891331 A CN 105891331A CN 201610203541 A CN201610203541 A CN 201610203541A CN 105891331 A CN105891331 A CN 105891331A
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- tubular piezoelectric
- intelligent aggregate
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- signal
- concrete
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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
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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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
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0421—Longitudinal waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a concrete structure defect online positioning method based on tubular piezoelectric intelligent aggregate. The tubular piezoelectric intelligent aggregate, a signal generator, a signal amplifier and a signal collector are adopted. The tubular piezoelectric intelligent aggregate is formed by pouring ultrahigh-performance concert and buried in a concrete structure to be detected in advance. In the detection process, high-frequency impulse voltage signals generated by the signal generator are amplified by the signal amplifier and then transmitted to the tubular piezoelectric intelligent aggregate, so that the tubular piezoelectric intelligent aggregate vibrates in the radial direction, and longitudinal waves are generated in the whole plane of the concrete to be detected, wherein reflected impulse signals can be generated when the impulse signals are transmitted to the defect part; the tubular piezoelectric intelligent aggregate receives the impulse signals reflected by the interior defect part of the concrete to be detected for defect positioning. According to the method, the uniform-amplitude ultrasonic impulse signals are emitted in the whole detection plane by 360 degrees, and the impulse signals reflected by the interior defect part of the concrete are used for defect positioning.
Description
Technical field
The present invention relates to civil engineering structure safety monitoring field, specifically based on tubular piezoelectric intelligent aggregate coagulation
Soil structure defect tuning on-line method.
Background technology
At present, conventional xoncrete structure lossless detection method includes supercritical ultrasonics technology, geological radar method, x-ray method, infrared
Imaging method, acoustic-emission etc., although these methods can quickly detect and position the internal flaw of xoncrete structure, but these
Method is often one detection method afterwards, it is impossible to realize the tuning on-line detection of defect in concrete.
In recent years, although intelligent aggregate technology based on piezoelectric ceramics can realize xoncrete structure online healthy prison for a long time
Survey, but owing to these intelligent aggregate many employings rectangles or square piezoelectric ceramics excite element as signal, it produces
Stress wave has extremely strong directivity, often can only linearly propagate, and causes the method to be difficult to comprehensively and grasps whole monitored area
Defect situation, and this monitoring technology often can only judge structure whether existing defects, it is impossible to determine the position of defect.
Summary of the invention
It is an object of the invention to provide defects of concrete structure tuning on-line side based on tubular piezoelectric intelligent aggregate
Method, the amplitude ultrasonic pulsative signal such as 360 degree of direction transmittings in whole detection plane, and utilize defect in concrete to reflect
Pulse signal carries out the location of defect.
For achieving the above object, the present invention provides following technical scheme:
Defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate, the device of employing includes tubular pressure
Electricity intelligent aggregate, signal generator, signal amplifier and signal picker；Tubular piezoelectric intelligent aggregate is embedded in be checked the most in advance
Inside survey xoncrete structure, during detection, the high-frequency pulse voltage signal that signal generator produces first is carried out via signal amplifier
Amplify, be transmitted further to tubular piezoelectric intelligent aggregate, make this tubular piezoelectric intelligent aggregate radially vibrate, at coagulation to be detected
Produce compressional wave in the whole plane of soil, reflected impulse signal during this pulse signal transmission to fault location, can be produced；Tubular piezoelectricity intelligence
Can receive by the pulse signal of defect in concrete to be detected reflection by aggregate, and transmit to signal picker, utilize coagulation
The pulse signal of soil defect reflection carries out the location of defect.
As the further scheme of the present invention: described tubular piezoelectric intelligent aggregate is followed successively by very-high performance from the inside to the outside and mixes
Solidifying soil, tubular piezoelectric ceramics and ultra-high performance concrete；And be respectively welded for passing in tubular piezoelectric ceramics inner and outer rings
The shielded cable of defeated signal, after having welded shielded cable, its table inner and outer surfaces uniformly coats insulating cement.
As the further scheme of the present invention: described tubular piezoelectric intelligent aggregate utilizes ultra-high performance concrete by pipe
Shape piezoelectric ceramics pours into a diameter of 15-20mm, the cylinder of a height of 10-20mm.
As the further scheme of the present invention: be embedded in all tubular piezoelectric intelligents within xoncrete structure to be detected in advance
Aggregate axis is parallel to each other, be distributed in same plane.
As the further scheme of the present invention: be embedded in the tubular piezoelectric intelligent aggregate within xoncrete structure one in advance
Tubular piezoelectric intelligent aggregate is as signal excitation element, for producing pulse signal at inside concrete；Other tubular pressure
Electricity intelligent aggregate is as signal receiving element, for receiving the pulse signal after xoncrete structure internal transmission.
As the further scheme of the present invention: the high-frequency pulse voltage signal produced by signal generator is through signal amplifier
It is transferred to the tubular piezoelectric intelligent aggregate as signal excitation element by shielded cable after amplification, makes this tubular piezoelectricity intelligence
Can aggregate radially vibrate, and in the plane at signal excitation element place produce 360 degree of directions etc. amplitude compressional wave.
As the further scheme of the present invention: the tubular piezoelectric intelligent aggregate as signal receiving element receives by signal
Excite the pulse signal directly transmitted at element and the pulse signal reflected by defect in concrete.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention uses the tubular piezoelectric intelligent aggregate amplitude ultrasonic pulse such as 360 degree of direction transmittings letter in whole detection plane
Number, and the pulse signal utilizing defect in concrete to reflect carries out the location of defect.Tubular piezoelectric intelligent aggregate is internal close
Reality is good, intensity is high, ultrasonic signal little, the long transmission distance of decay.The present invention can quickly detect and tie with tuning on-line concrete
The internal flaw of structure, can judge structure whether existing defects, can accurately determine the position of defect.
Accompanying drawing explanation
Fig. 1 is that tubular piezoelectric intelligent aggregate arranges schematic diagram at xoncrete structure to be detected；
Fig. 2 is to excite from tubular piezoelectric intelligent aggregate to send pulse signal propagation schematic diagram at element；
Fig. 3 is tubular piezoelectric ceramic vibration schematic diagram；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is tubular piezoelectric intelligent aggregate schematic diagram；
Fig. 6 be Fig. 5 be top view；
Fig. 7 is signal processing schematic diagram；
Fig. 8 is that the reflected impulse signal utilizing defect carries out defect location schematic diagram；
In figure: 1-tubular piezoelectric ceramics；2-ultra-high performance concrete；3-shielded cable；4-tubular piezoelectric intelligent aggregate；5-
Concrete to be detected.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate, bag
Include tubular piezoelectric intelligent aggregate 4, signal generator, signal amplifier and signal picker.
As depicted in figs. 1 and 2, the present invention is in advance at the internal the most packaged pre-buried tubular piezoelectric intelligent of xoncrete structure
Aggregate 4, sends out one of them tubular piezoelectric intelligent aggregate 4 in 360 degree of directions as signal excitation element in detection plane
The amplitude ultrasonic pulsative signal such as penetrating, other tubular piezoelectric intelligent aggregate 4, as signal receiving element, receives by from as signal
Excite the pulse signal directly transmitted at the tubular piezoelectric intelligent aggregate 4 of element and reflected by defect in concrete
The pulse signal come, the reflected signal finally utilizing defects of concrete structure to produce carries out the location of defect.
Tubular piezoelectric intelligent aggregate 4 in the present invention use tubular piezoelectric ceramics 1 as signal conversion element, such as figure
Shown in 3-4, tubular piezoelectric ceramics 1 can produce radially etc. amplitude vibration or that vibration displacement is converted into the signal of telecommunication is defeated
Go out.
As seen in figs. 5-6, the tubular piezoelectric intelligent aggregate 4 in the present invention uses ultra-high performance concrete 2 to pour into a mould,
Tubular piezoelectric intelligent aggregate 4 is internal, and density is good, intensity is high, ultrasonic signal little, the long transmission distance of decay.Tubular piezoelectricity intelligence
Energy aggregate 4 making step is as follows:
First, tubular piezoelectric ceramics 1 inner and outer rings has been respectively welded the shielded cable 3 transmission for signal；Then, circle
After tubular piezoelectric ceramics 1 has welded shielded cable 3, its table inner and outer surfaces uniformly coats insulating cement so that it is completely insulated；
Finally, utilize ultra-high performance concrete 2 that tubular piezoelectric ceramics 1 pours into a diameter of 15-20mm, a height of 10-20mm
Cylinder.
As it is shown in figure 1, during pre-buried tubular piezoelectric intelligent aggregate 4, should ensure that intelligence tubular piezoelectric intelligent aggregate 4 axis
Parallel to each other and tubular piezoelectric intelligent aggregate 4 is all distributed in same plane.
During detection, some tubular piezoelectric intelligent aggregate 4 therein can be randomly selected as signal excitation element, treating
Detection concrete 5 is internal produces pulse signal, and other tubular piezoelectric intelligent aggregate 4 exists for reception as signal receiving element
Pulse signal after concrete 5 inside configuration to be detected transmission.
During detection, the high-frequency pulse voltage signal that signal generator produces first is amplified via signal amplifier, then leads to
Cross shielded cable 3 and be transferred to the tubular piezoelectric intelligent aggregate 4 as signal excitation element, make this tubular piezoelectric intelligent aggregate
4 radially vibrate, and finally produce compressional wave, meeting during this pulse signal transmission to fault location in the whole plane of concrete 5 to be detected
Produce reflected impulse signal.Tubular piezoelectric intelligent aggregate 4 as signal receiving element can receive by signal excitation element
The pulse signal that place directly transmits can also receive by the pulse signal of concrete 5 internal flaw to be detected reflection.
When structure zero defect, at concrete 5 internal excitation pulse signal to be detected and record i-th according to above-mentioned steps
The pulse signal that individual tubular piezoelectric intelligent aggregate 4 receives；After there is defect in concrete 5 inside configuration to be detected,
Again repeat aforesaid operations, and record now pulse signal received by i-th tubular piezoelectric intelligent aggregate 4。
Utilize n the pulse signal recordedIt is calculated the speed that compressional wave transmits in concrete 5 to be detected,, wherein (,) use tubular piezoelectric intelligent aggregate 4 coordinate for exciting, (,) it is the coordinate of i-th reception tubular piezoelectric intelligent aggregate 4,I-th tubular piezoelectric intelligent bone is reached for compressional wave
The time of material 4.
Such as Fig. 7, two pulse signals that will recordWithMake difference operation, i.e., can
Obtain the pulse signal after defect reflection, byCan determine that pulse signal is by exciting element T to reach after defect D reflects
To the propagation time receiving element Si, and can obtain exciting element T, defect D and the distance that receives between element Si are。
Such as Fig. 8, to excite element T and to receive element S during locationiFor two oval focuses, withEllipse is made for major axis,
The intersection point of multiple ellipses is the position of defect.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (7)
1. defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate, the device of employing includes tubular
Piezoelectric intelligent aggregate, signal generator, signal amplifier and signal picker；It is characterized in that, tubular piezoelectric intelligent aggregate
Be embedded in inside xoncrete structure to be detected in advance in advance, during detection, the high-frequency pulse voltage signal that signal generator produces first via
Signal amplifier is amplified, and is transmitted further to tubular piezoelectric intelligent aggregate, makes this tubular piezoelectric intelligent aggregate radially shake
Dynamic, in the whole plane of concrete to be detected, produce compressional wave, reflected impulse letter during this pulse signal transmission to fault location, can be produced
Number；Tubular piezoelectric intelligent aggregate receives by the pulse signal of defect in concrete to be detected reflection, and transmits to signal
Harvester, the pulse signal utilizing concrete defect to reflect carries out the location of defect.
Defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate the most according to claim 1,
It is characterized in that, described tubular piezoelectric intelligent aggregate is followed successively by ultra-high performance concrete, tubular piezoelectric ceramics from the inside to the outside
And ultra-high performance concrete；And in tubular piezoelectric ceramics inner and outer rings, it has been respectively welded the shielded cable for transmitting signal, weldering
After having connect shielded cable, its table inner and outer surfaces uniformly coats insulating cement.
Defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate the most according to claim 2,
It is characterized in that, described tubular piezoelectric intelligent aggregate utilizes ultra-high performance concrete that tubular piezoelectric ceramics is poured into diameter
For 15-20mm, the cylinder of a height of 10-20mm.
Defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate the most according to claim 1,
It is characterized in that, be embedded in advance all tubular piezoelectric intelligent aggregate axis within xoncrete structure to be detected parallel to each other, point
It is distributed in same plane.
5. according to the defects of concrete structure tuning on-line side based on tubular piezoelectric intelligent aggregate described in claim 1 or 4
Method, it is characterised in that be embedded in a tubular piezoelectric intelligent bone in the tubular piezoelectric intelligent aggregate within xoncrete structure in advance
Material is as signal excitation element, for producing pulse signal at inside concrete；Other tubular piezoelectric intelligent aggregate is as letter
Number receive element, for receiving pulse signal after xoncrete structure internal transmission.
Defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate the most according to claim 2,
It is characterized in that, signal generator the high-frequency pulse voltage signal produced is passed by shielded cable after signal amplifier amplifies
It is defeated by the tubular piezoelectric intelligent aggregate as signal excitation element, makes this tubular piezoelectric intelligent aggregate radially vibrate, and
In the plane at signal excitation element place produce 360 degree of directions etc. amplitude compressional wave.
Defects of concrete structure tuning on-line method based on tubular piezoelectric intelligent aggregate the most according to claim 1,
It is characterized in that, the tubular piezoelectric intelligent aggregate reception as signal receiving element is directly transmitted across by signal excitation element
The pulse signal come and the pulse signal reflected by defect in concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610203541.3A CN105891331A (en) | 2016-04-01 | 2016-04-01 | Concrete structure defect online positioning method based on tubular piezoelectric intelligent aggregate |
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| CN201610203541.3A CN105891331A (en) | 2016-04-01 | 2016-04-01 | Concrete structure defect online positioning method based on tubular piezoelectric intelligent aggregate |
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Cited By (3)
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| CN106441074A (en) * | 2016-09-29 | 2017-02-22 | 大连理工大学 | Piezoelectric ceramic tube-based cylindrical intelligent aggregate device |
| CN113552220A (en) * | 2021-08-13 | 2021-10-26 | 同济大学 | Reinforced concrete structure health monitoring system |
| CN115467378A (en) * | 2022-08-16 | 2022-12-13 | 江苏鸿基节能新技术股份有限公司 | Portable foundation engineering intelligence wireless detection equipment |
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