CN109030629A - A kind of steel and concrete structure bonding quality evaluating apparatus and method based on PZT - Google Patents
A kind of steel and concrete structure bonding quality evaluating apparatus and method based on PZT Download PDFInfo
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- CN109030629A CN109030629A CN201810768788.9A CN201810768788A CN109030629A CN 109030629 A CN109030629 A CN 109030629A CN 201810768788 A CN201810768788 A CN 201810768788A CN 109030629 A CN109030629 A CN 109030629A
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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
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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
- G01N29/11—Analysing solids by measuring attenuation of acoustic 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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
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Abstract
The present invention provides a kind of steel and concrete structure bonding quality evaluating apparatus and method based on PZT, with PZT the acoustic signals propagated along steel body are excited and received in steel and concrete structure outer wall, carry out steel body and the evaluation of concrete bonding quality, it will test device to be demarcated in the state of different cementing quality, then steel and concrete structure bonding quality to be measured evaluated by the relationship between wave energy and bonding quality of going directly.
Description
Technical field
The present invention relates to steel body and technical field of concrete, in particular to a kind of steel and concrete structure bonding quality based on PZT
Evaluating apparatus and method.
Background technique
Steel body and concrete bonding quality are most important for steel and concrete structure (such as concrete filled steel tube) stability.Steel body
So that concrete is in three dimension stress state the effect of restraint of concrete, improves the stress of concrete, while in steel body
The concrete support steel pipe of wall filling avoids being pressurized unstable.Steel and concrete structure has carrying energy well by the advantage of the two
Power and shock resistance, so that steel reinforced concrete component is widely used in heavy construction.Since large volume complexity steel and concrete structure is built
If concrete members irrigation amount is larger in the process, after the completion of pouring, concrete will appear contraction situation, in turn result in concrete
Peeling is generated with steel body wall.Studies have shown that steel body inner wall and core concrete interface agglutination poor quality generate stripped shape
State can weaken the mechanical characteristic of steel reinforced concrete component, influence structure safety, therefore using effective method to steel reinforced concrete component bonding quality
Evaluation is of great significance.
Currently, mainly having Fluctuation Method, hammering method etc. for the evaluation of steel and concrete structure bonding quality.Fluctuation Method is mainly by steel
PZT piezoelectric ceramics built in the inside concrete of mixed structure, the acoustic signals that PZT is motivated are by the receiving array of steel and concrete structure outer wall
It receives to carry out bonding quality evaluation, this method needs preset PZT in advance, operates more complicated；Hammering method is mainly rule of thumb
Judge whether to damage, no objective data generally only make auxiliary detection means as analysis object.It is therefore desirable to propose
A kind of steel reinforced concrete bonding quality evaluation method simple to operation.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provide a kind of steel and concrete structure bonding quality evaluating apparatus based on PZT and
Method excites and receives the acoustic signals propagated along steel body in steel and concrete structure outer wall using PZT, carries out steel body and concrete is cementing
Quality evaluation will test device and be demarcated in the state of different cementing quality, then pass through through wave energy and cementing matter
Relationship between amount evaluates steel and concrete structure bonding quality to be measured.
To achieve the above object, the present invention discloses a kind of steel and concrete structure bonding quality evaluating apparatus based on PZT, the dress
It sets including the first transmitting probe 1 and the second receiving transducer 2；
First transmitting probe 1 includes the first noumenon 10, connect with the first noumenon 10 the first intermediate 11 coaxial is set
In the outside of the first intermediate 11 the first magnet 12, be coaxially placed in the first PZT piezoelectric element 13 of 11 inside of the first intermediate, set
It sets in the first amplification modulating circuit 14 the first intermediate 11 inside and be electrically connected with the first PZT piezoelectric element 13, is put with first
The first connection cables 15 that big modulation circuit 14 is electrically connected；
Second receiving transducer 2 includes the second ontology 20, connect with the second ontology 20 the second intermediate 21 coaxial is set
The second magnet 22, coaxial the 2nd PZT piezoelectric element 23 for being placed in 21 inside of the second intermediate in 21 outside of the second intermediate, if
It sets in the second amplification modulating circuit 24 the second intermediate 21 inside and be electrically connected with the 2nd PZT piezoelectric element 23, is put with second
The second connection cables 25 that big modulation circuit 24 is electrically connected；
First connection cables 15 pass through the conducting wire being arranged in metallic channel 3 with the second connection cables 25 and are connected；
It further include the pulse signal excitation module 4 being electrically connected with first transmitting probe 1, with 2 electricity of the second receiving transducer
The acquisition module 5 of connection, the USB transmission module 6 being electrically connected respectively with pulse signal excitation module 4 and acquisition module 5 and and USB
The host computer 7 that transmission module 6 is electrically connected.
It include hardware parameter setup module 71, data storage playback module in the host computer 7 in above-mentioned technical proposal
72, waveform display module 73 and data analysis module 74.
The steel and concrete structure bonding quality evaluation method based on PZT that invention additionally discloses a kind of, the method includes following steps
It is rapid:
S1,7 control wave excitation module 4 of host computer generate pulse signal, and pulse signal transmission to the first transmitting is visited
First 1；
S2, pulse signal are converted to acoustic signals by the first transmitting probe 1, and acoustic signals propagate to the along steel and concrete structure
Two receiving transducers 2 receive acoustical signal, while acquisition module 5 collects acoustic signals, are transmitted to host computer 7 and are handled；
Acoustic signals under S3, the different steel and concrete structure cementing status of acquisition calculate the through wave energy of the signal, pass through mark
Surely the relationship of bonding quality Yu through wave energy is established；
S4, the through wave energy obtained by step S3 evaluate steel and concrete structure bonding quality.
In above-mentioned technical proposal, the excitation width of pulse signal is 6 μ s in the step S1, and the excitation width is not according to
It is adjusted with detection steel and concrete structure.
In above-mentioned technical proposal, in the step S3 calculate direct wave energy the following steps are included:
S31, pass through setting window function g (t), calculate separately different cementing state acoustic signals using Short Time Fourier Transform
The power spectrum of different moments, calculation formula are as follows:
Wherein, t is the time, and ω is angular frequency, and f is frequency, and v (t) is acoustic signals, A (t, f) function be to be when t in
The heart when window g (t) in signal v (t) Fourier's amplitude spectrum；
S32, the energy for calculating direct wave, formula are as follows:
Wherein t1Then for direct wave, t2For direct wave deadline.
A kind of steel and concrete structure bonding quality evaluating apparatus and method based on PZT of the present invention, has the advantages that this
Invention realizes that steel and concrete structure bonding quality is evaluated using the acoustic signals propagated along steel body are received based on the receiving transducer of PZT,
Has the advantages that both sides: one is the present invention does not need the built-in transmitting inside steel and concrete structure compared with routine evaluations scheme
Probe operates simpler.The second is the present invention utilizes the evaluation that bonding quality is realized based on the through wave energy propagated along steel body,
Calculation method is simple and quick, provides reliable methods and techniques for the evaluation of steel and concrete structure bonding quality.
Detailed description of the invention
Fig. 1 is that a kind of the first transmitting probe of steel and concrete structure bonding quality evaluating apparatus based on PZT of the present invention connects with second
Receive sonde configuration schematic diagram；
Fig. 2 is the first transmitting probe and the second face receiving transducer structure A view of the invention；
Fig. 3 is a kind of steel and concrete structure bonding quality evaluating apparatus module map based on PZT of the present invention；
Fig. 4 is host computer internal module figure of the present invention；
Fig. 5 is that a kind of steel and concrete structure bonding quality based on PZT of the present invention comments flow chart；
Fig. 6 is the acoustic signals waveform diagram of steel and concrete structure of embodiment of the present invention different cementing state acquisition；
Detailed description of the invention: the first transmitting probe of 1-, 10- the first noumenon, the first intermediate of 11-, the first magnet of 12-, 13- first
PZT piezoelectric element, the first amplification modulating circuit of 14-, the first connection cables of 15-, the second receiving transducer of 2-, the second ontology of 20-,
The second intermediate of 21-, the second magnet of 22-, the 2nd PZT piezoelectric element of 23-, the second amplification modulating circuit of 24-, the connection of 25- second
Cable, 3- metallic channel, 4- pulse excitation module, 5- acquisition module, 6-USB transmission module, 7- host computer, 71- hardware parameter are set
Module is set, 72- data store playback module, 73- waveform display module, 74- data analysis module.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing, and the present invention provides a kind of steel and concrete structure based on PZT
Bonding quality evaluating apparatus, as shown in Figure 1 and as shown in Figure 2 and as shown in figure 3, described device includes 1 He of the first transmitting probe
Second receiving transducer 2；
First transmitting probe 1 includes the first noumenon 10, connect with the first noumenon 10 the first intermediate 11 coaxial is set
In the outside of the first intermediate 11 the first magnet 12, be coaxially placed in the first PZT piezoelectric element 13 of 11 inside of the first intermediate, set
It sets in the first amplification modulating circuit 14 the first intermediate 11 inside and be electrically connected with the first PZT piezoelectric element 13, is put with first
The first connection cables 15 that big modulation circuit 14 is electrically connected；
Second receiving transducer 2 includes the second ontology 20, connect with the second ontology 20 the second intermediate 21 coaxial is set
The second magnet 22, coaxial the 2nd PZT piezoelectric element 23 for being placed in 21 inside of the second intermediate in 21 outside of the second intermediate, if
It sets in the second amplification modulating circuit 24 the second intermediate 21 inside and be electrically connected with the 2nd PZT piezoelectric element 23, is put with second
The second connection cables 25 that big modulation circuit 24 is electrically connected；
First connection cables 15 pass through the conducting wire being arranged in metallic channel 3 with the second connection cables 25 and are connected；
It further include the pulse signal excitation module 4 being electrically connected with first transmitting probe 1, with 2 electricity of the second receiving transducer
The acquisition module 5 of connection, the USB transmission module 6 being electrically connected respectively with pulse signal excitation module 4 and acquisition module 5 and and USB
The host computer 7 that transmission module 6 is electrically connected.
Wherein, the PZT piezoelectric element is piezoceramic transducer.
Wherein, as shown in figure 4, including hardware parameter setup module 71, data storage playback module in the host computer 7
72, waveform display module 73 and data analysis module 74.
Wherein, the multithread application that host computer 7 is write with labview, host computer 7 by USB transmission module 6 into
Row data exchange, hardware parameter setup module 71 can be inputted by keyboard and mouse selects the ginseng that front panel in host computer 7 is arranged
Number, plays the role of human-computer interaction.Host computer 7 store to received data and real-time waveform shows convenient for intuitive analysis number
According to data analysis is FFT to signal first, extracts basic frequency of signal, then data are saved, can pass through 7 data readback of host computer
Function carries out Wave data reproduction.
The steel and concrete structure bonding quality evaluation method based on PZT that the present invention also provides a kind of, the method includes following steps
Suddenly, as described in Figure 5:
S1,7 control wave excitation module 4 of host computer generate pulse signal, and pulse signal transmission to the first transmitting is visited
First 1；
S2, pulse signal are converted to acoustic signals by the first transmitting probe 1, and acoustic signals propagate to the along steel and concrete structure
Two receiving transducers 2 receive acoustical signal, while acquisition module 5 collects acoustic signals, are transmitted to host computer 7 and are handled；
Acoustic signals under S3, the different steel and concrete structure cementing status of acquisition calculate the through wave energy of the signal, pass through mark
Surely the relationship of bonding quality Yu through wave energy is established；
S4, the through wave energy obtained by step S3 evaluate steel and concrete structure bonding quality.
Wherein, the excitation width of pulse signal is 6 μ s in the step S1, and the excitation width is according to different detection steel reinforced concretes
Structure is adjusted.
Wherein, in the step S3 calculate direct wave energy the following steps are included:
S31, pass through setting window function g (t), calculate separately different cementing state acoustic signals using Short Time Fourier Transform
The power spectrum of different moments, calculation formula are as follows:
Wherein, t is the time, and ω is angular frequency, and f is frequency, and v (t) is acoustic signals, A (t, f) function be to be when t in
The heart when window g (t) in signal v (t) Fourier's amplitude spectrum；
S32, the energy for calculating direct wave, formula are as follows:
Wherein t1Then for direct wave, t2For direct wave deadline.
The present invention provides the acoustic signals of embodiment steel and concrete structure different cementing state acquisition, specific as follows:
By the steel and concrete structure bonding quality evaluating apparatus based on PZT in it is completely cementing, half cementing, be completely exfoliated three kinds
Operating condition steel body outer wall, pumping signal are the bipolar square wave pulse that amplitude is 48V, width is 6 μ s, obtain three kinds as shown in Figure 6
Acoustic signals under operating condition are respectively using the direct-path signal energy that method statistic shown in step S3 obtains three kinds of operating conditions
0.3508,1.1954,5.2924。
The part not illustrated in specification is the prior art or common knowledge.Present embodiment is merely to illustrate the hair
It is bright, rather than limit the scope of the invention, the modifications such as equivalent replacement that those skilled in the art make the present invention are recognized
To be fallen into invention claims institute protection scope.
Claims (5)
1. a kind of steel and concrete structure bonding quality evaluating apparatus based on PZT, described device includes the first transmitting probe (1) and second
Receiving transducer (2)；
It is first transmitting probe (1) includes the first noumenon (10), connect with the first noumenon (10) the first intermediate (11), same
The first magnet (12) that axis is placed on the outside of the first intermediate (11), the first PZT pressure being coaxially placed on the inside of the first intermediate (11)
Electric device (13), the first amplification tune for being arranged on the inside of the first intermediate (11) and being electrically connected with the first PZT piezoelectric element (13)
Circuit (14) processed, the first connection cables (15) being electrically connected with the first amplification modulating circuit (14)；
Second receiving transducer (2) include the second ontology (20), connect with the second ontology (20) the second intermediate (21), together
The second magnet (22) that axis is placed on the outside of the second intermediate (21), the 2nd PZT pressure being coaxially placed on the inside of the second intermediate (21)
Electric device (23), is arranged on the inside of the second intermediate (21) and the second amplification being electrically connected with the 2nd PZT piezoelectric element (23) is adjusted
Circuit (24) processed, the second connection cables (25) being electrically connected with the second amplification modulating circuit (24)；
First connection cables (15) are connected with the second connection cables (25) by the conducting wire being arranged in metallic channel (3)；
It further include the pulse signal excitation module (4) being electrically connected with first transmitting probe (1), with the second receiving transducer (2)
The acquisition module (5) of electrical connection, the USB transmission module being electrically connected respectively with pulse signal excitation module (4) and acquisition module (5)
(6) and with USB transmission module (6) host computer (7) being electrically connected.
2. a kind of steel and concrete structure bonding quality evaluating apparatus based on PZT according to claim 1, which is characterized in that described
It include hardware parameter setup module (71), data storage playback module (72), waveform display module (73) and number in host computer (7)
According to analysis module (74).
3. a kind of steel and concrete structure bonding quality evaluation method based on PZT, which is characterized in that the described method comprises the following steps:
S1, host computer (7) control wave excitation module (4) generate pulse signal, and pulse signal transmission to the first transmitting is visited
Head (1)；
S2, pulse signal are converted to acoustic signals by the first transmitting probe (1), and acoustic signals propagate to second along steel and concrete structure
Receiving transducer (2) receives acoustical signal, while acquisition module (5) collects acoustic signals, is transmitted at host computer (7)
Reason；
Acoustic signals under S3, the different steel and concrete structure cementing status of acquisition calculate the through wave energy of the signal, are built by calibration
The relationship of vertical bonding quality and through wave energy；
S4, the through wave energy obtained by step S3 evaluate steel and concrete structure bonding quality.
4. a kind of steel and concrete structure bonding quality evaluation method based on PZT according to claim 3, which is characterized in that described
The excitation width of pulse signal is 6 μ s in step S1, and the excitation width is adjusted according to different detection steel and concrete structures.
5. a kind of steel and concrete structure bonding quality evaluation method based on PZT according to claim 3, which is characterized in that described
In step S3 calculate direct wave energy the following steps are included:
S31, pass through setting window function g (t), it is different to calculate separately different cementing state acoustic signals using Short Time Fourier Transform
The power spectrum at moment, calculation formula are as follows:
Wherein, t is the time, and ω is angular frequency, and f is frequency, and v (t) is acoustic signals, and A (t, f) function is centered on when t
When window g (t) in signal v (t) Fourier's amplitude spectrum；
S32, the energy for calculating direct wave, formula are as follows:
Wherein t1Then for direct wave, t2For direct wave deadline.
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Cited By (1)
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| CN112593922A (en) * | 2020-12-16 | 2021-04-02 | 中国石油大学(华东) | Method and device for evaluating cementing quality of two well cementation interfaces through array acoustic logging |
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