CN109959711B - Piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis - Google Patents
Piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis Download PDFInfo
- Publication number
- CN109959711B CN109959711B CN201910277115.8A CN201910277115A CN109959711B CN 109959711 B CN109959711 B CN 109959711B CN 201910277115 A CN201910277115 A CN 201910277115A CN 109959711 B CN109959711 B CN 109959711B
- Authority
- CN
- China
- Prior art keywords
- piezoelectric ceramic
- piezoelectric
- voltage signal
- time domain
- ceramic piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
-
- 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
- G01N29/048—Marking the faulty objects
-
- 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
-
- 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
- G01N2291/0231—Composite or layered materials
-
- 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
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
-
- 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
Abstract
The invention discloses a piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis, wherein the method comprises the following steps: the control signal generator generates a sine pulse voltage signal and amplifies the sine pulse voltage signal through the voltage amplifier; connecting the amplified sinusoidal pulse voltage signal to a driving end of a piezoelectric ceramic piece, wherein the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and transmits the ultrasonic vibration in a form of stress waves in a carbon fiber reinforced composite material-concrete combined component, and a piezoelectric ceramic piece functional element array at a receiving end generates time domain voltage signals with different peak values under the action of the piezoelectric effect of the piezoelectric ceramic piece; the time domain voltage signals of different channels are collected through a multi-channel data collection device, and data analysis is carried out on the collected time domain voltage signals according to a multi-channel surface wave analysis method so as to complete damage detection. The method has low detection cost and high identification precision of the interface peeling defect, and is convenient to popularize and apply in engineering practice.
Description
Technical Field
The invention relates to the technical field of defect detection, in particular to a piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis.
Background
The related technologies capable of achieving the maturity of the interface peeling defect in the carbon fiber reinforced composite-concrete composite member (CFRP-concrete composite member) mainly include a wave method, an impedance method, an electromagnetic wave method, a knocking method, and the like. The wave method mainly includes a body wave method and a surface wave method, wherein the body wave method has a small detection range, and generally needs to embed a sensor in advance to make up for the defect that stress waves are rapidly attenuated in concrete. Although the surface wave method solves the problem of sensor pre-embedding in the bulk wave method, the detection precision is low, and the detection range is relatively small. The electromagnetic wave method has high detection precision, but the detection cost is expensive. The tapping method is low in detection cost, but the detection result has strong dependence on the experience of detection personnel, and is generally only used as an auxiliary detection means. The bonding condition of the interface in the CFRP-concrete combined member is the key for ensuring the cooperative stress of CFRP (Carbon Fiber Reinforced Polymer/Plastic) and concrete, and has important significance for ensuring the structure safety, so that a set of nondestructive monitoring system which has high detection efficiency and low cost and is convenient to popularize and apply in actual engineering needs to be developed.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, one purpose of the invention is to provide a nondestructive testing method based on piezoelectric ceramic multi-channel surface wave analysis, which has low testing cost and high identification precision of interface peeling defects and is convenient to popularize and apply in engineering practice.
Another objective of the present invention is to provide a nondestructive testing system based on multi-channel surface wave analysis of piezoelectric ceramics.
In order to achieve the above object, an embodiment of the present invention provides a nondestructive testing method based on multichannel surface wave analysis of piezoelectric ceramics, including: the control signal generator generates a sine pulse voltage signal, and the sine pulse voltage signal is amplified through a voltage amplifier;
the amplified sinusoidal pulse voltage signal is connected to a piezoelectric ceramic piece driving end which is attached to the surface of the carbon fiber reinforced composite material-concrete combined component, the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and is transmitted in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, and a piezoelectric ceramic piece functional element array at a receiving end generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect;
and acquiring the time domain voltage signals of different channels through a multi-channel data acquisition device, and performing data analysis on the acquired time domain voltage signals according to a multi-channel surface wave analysis method to finish damage detection.
According to the nondestructive testing method for the multi-channel surface wave analysis based on the piezoelectric ceramics, a piezoelectric ceramic wafer (PZT) is pasted on the outer side of a CFRP, and a data acquisition mode of the multi-channel surface wave analysis is formed through 32 groups of arrays of PZT intelligent materials. The position of the CFRP-concrete interface peeling defect can be judged through characteristic parameter analysis of time-course signals output by the PZT functional element array, and the stress wave attribute is judged by combining forward analysis of the time-course signals, so that the interface peeling defect is dually identified, the detection cost is low, and the identification precision of the interface peeling defect is high.
In addition, the nondestructive testing method based on the multi-channel surface wave analysis of the piezoelectric ceramics according to the above embodiment of the invention may further have the following additional technical features:
further, in an embodiment of the present invention, the method further includes:
outputting the amplified sinusoidal pulse voltage signal to an oscilloscope through a coaxial shielded wire, and detecting the waveform of the amplified sinusoidal pulse voltage signal;
and outputting the waveform of the first functional unit in the piezoelectric ceramic chip functional element array to an oscilloscope through a coaxial shielding wire so as to detect whether the line connection is abnormal.
Further, in an embodiment of the present invention, the performing data analysis on the acquired time-domain voltage signal according to a multi-channel surface wave analysis method to complete damage detection specifically includes:
and F-K forward analysis is carried out on the data of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, the attribute of the surface wave propagating in the carbon fiber reinforced composite material-concrete combined member is identified, and damage identification is realized by comparing the attribute with theoretical Lamb waves and Rayleigh waves.
Further, in an embodiment of the present invention, the performing data analysis on the acquired time-domain voltage signal according to a multi-channel surface wave analysis method to complete damage detection specifically includes:
and judging the starting point and the ending point of the interface stripping defect in the carbon fiber reinforced composite material-concrete combined member according to the change of the amplitude coaxial characteristic of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, thereby realizing damage positioning.
Further, in an embodiment of the present invention, the amplified sinusoidal pulse voltage signal is input to the driving end of the piezoelectric ceramic piece through a coaxial shielding wire, and due to an inverse piezoelectric effect of a piezoelectric material in the driving end of the piezoelectric ceramic piece, the driving end of the piezoelectric ceramic piece generates high-frequency vibration under the action of the high-frequency pulse voltage signal, and the high-frequency vibration propagates in the carbon fiber reinforced composite material-concrete composite member in the form of a piezoelectric stress wave, so that the piezoelectric ceramic piece functional element array generates the time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
In order to achieve the above object, another embodiment of the present invention provides a piezoelectric ceramic-based nondestructive testing system for multi-channel surface wave analysis, including:
the amplifying module is used for controlling the signal generator to generate a sinusoidal pulse voltage signal and amplifying the sinusoidal pulse voltage signal through the voltage amplifier;
the generating module is used for accessing the amplified sinusoidal pulse voltage signal to a piezoelectric ceramic piece driving end which is pasted on the surface of the carbon fiber reinforced composite material-concrete combined component, the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and propagates in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, and a piezoelectric ceramic piece functional element array at a receiving end generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect;
and the detection module is used for acquiring the time domain voltage signals of different channels through multi-channel data acquisition equipment and performing data analysis on the acquired time domain voltage signals according to a multi-channel surface wave analysis method to finish damage detection.
In the nondestructive testing system for multi-channel surface wave analysis based on piezoelectric ceramics, a piezoelectric ceramic plate PZT (piezoelectric ceramic plate) is pasted on the outer side of a CFRP (circulating fluid dynamics), and a data acquisition mode of multi-channel surface wave analysis is formed by 32 groups of PZT intelligent material arrays. The position of the CFRP-concrete interface peeling defect can be judged through characteristic parameter analysis of time-course signals output by the PZT functional element array, and the stress wave attribute is judged by combining forward analysis of the time-course signals, so that the interface peeling defect is dually identified, the detection cost is low, and the identification precision of the interface peeling defect is high.
In addition, the nondestructive testing system based on the multi-channel surface wave analysis of the piezoelectric ceramics according to the above embodiment of the invention may also have the following additional technical features:
further, in an embodiment of the present invention, the method further includes: an output module for outputting the output signals of the first and second modules,
the output module is used for outputting the amplified sinusoidal pulse voltage signal to an oscilloscope through a coaxial shielded wire and detecting the waveform of the amplified sinusoidal pulse voltage signal;
and the output module is also used for outputting the waveform of the first functional unit in the piezoelectric ceramic chip functional element array to an oscilloscope through a coaxial shielding wire so as to detect whether the line connection is abnormal or not.
Further, in an embodiment of the present invention, the detection module is, in particular,
and F-K forward analysis is carried out on the data of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, the attribute of the surface wave propagating in the carbon fiber reinforced composite material-concrete combined member is identified, and damage identification is realized by comparing the attribute with theoretical Lamb waves and Rayleigh waves.
Further, in an embodiment of the present invention, the detection module is, in particular,
and judging the starting point and the ending point of the interface stripping defect in the carbon fiber reinforced composite material-concrete combined member according to the change of the amplitude coaxial characteristic of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, thereby realizing damage positioning.
Further, in an embodiment of the present invention, the generating module is specifically configured to,
the amplified sine pulse voltage signal is input to the piezoelectric ceramic piece driving end through a coaxial shielding wire, and due to the inverse piezoelectric effect of a piezoelectric material in the piezoelectric ceramic piece driving end, the piezoelectric ceramic piece driving end generates high-frequency vibration under the action of the high-frequency pulse voltage signal, and the high-frequency vibration is transmitted in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, so that the piezoelectric ceramic piece functional element array generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a nondestructive testing method based on multi-channel surface wave analysis of piezoelectric ceramics according to an embodiment of the present invention;
FIG. 2 illustrates a geometry and interfacial peel defect of a CFRP-concrete composite member according to an embodiment of the invention;
FIG. 3 is a schematic view of the propagation of a stress wave in a CFRP-concrete composite member according to an embodiment of the invention;
fig. 4 is an arrangement of a driving end of a piezoceramic wafer and an array of piezoceramic wafer functional elements according to an embodiment of the present invention;
FIG. 5 is a detailed view of a PZT function cell assembly employed in accordance with one embodiment of the present invention;
FIG. 6 is a flow diagram of nondestructive monitoring of a CFRP-concrete composite member according to an embodiment of the invention;
FIG. 7 is a flow diagram of data collection analysis and processing according to one embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a nondestructive testing system based on multi-surface wave analysis of piezoelectric ceramics according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a nondestructive testing method and system based on multi-surface wave analysis of piezoelectric ceramics according to an embodiment of the present invention with reference to the accompanying drawings.
First, a nondestructive testing method based on multi-surface wave analysis of piezoelectric ceramics proposed according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a flow chart of a nondestructive testing method based on multi-channel surface wave analysis of piezoelectric ceramics according to an embodiment of the invention.
As shown in fig. 1, the nondestructive testing method based on the multi-channel surface wave analysis of the piezoelectric ceramics comprises the following steps:
in step S101, the control signal generator generates a sinusoidal pulse voltage signal and amplifies the sinusoidal pulse voltage signal by a voltage amplifier.
Specifically, the detection method mainly comprises a high-performance computer, a signal generator, a voltage amplifier, an oscilloscope, a piezoelectric functional element, data acquisition equipment and an analysis program to realize defect detection.
Firstly, a high-performance computer sends out a control signal to control a signal generator to generate a sinusoidal pulse voltage signal, and then a voltage amplifier amplifies the voltage peak value of the sinusoidal pulse voltage signal. And inputting the amplified sinusoidal pulse voltage signal into an oscilloscope to check the waveform of the amplified sinusoidal pulse voltage signal.
In step S102, the amplified sinusoidal pulse voltage signal is connected to a piezoelectric ceramic piece driving end attached to the surface of the carbon fiber reinforced composite material-concrete composite member, the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and propagates in the carbon fiber reinforced composite material-concrete composite member in the form of piezoelectric stress wave, and the piezoelectric ceramic piece functional element array at the receiving end generates time domain voltage signals with different peak values under the effect of the piezoelectric ceramic piece positive piezoelectric effect.
Specifically, the driving end of the piezoelectric ceramic plate is composed of a PZT (piezoelectric ceramic) functional element, and the PZT piezoelectric functional element is composed of a bnc (bayonet number connector) joint, a coaxial shielding wire and the piezoelectric ceramic plate. The coaxial shielding lead is respectively connected with the BNC connector and the ceramic plate through welding. And the PZT ceramic chip array is adhered to the outer surface of the CFRP through epoxy resin, the array interval is a constant value, and the thickness uniformity of the adhesive layer and the flatness of the piezoelectric ceramic are controlled.
The piezoelectric ceramic plate adopts 32 groups of linear arrays and adopts high-precision multi-channel data acquisition equipment for acquisition, the vibration direction of the round piezoelectric ceramic plate is the thickness direction of the round piezoelectric ceramic plate, and high-frequency vibration is generated under the action of an input excitation voltage signal.
Further, in an embodiment of the present invention, the amplified sinusoidal pulse voltage signal is input to the driving end of the piezoelectric ceramic piece through the coaxial shielding wire, and due to the inverse piezoelectric effect of the piezoelectric material in the driving end of the piezoelectric ceramic piece, the driving end of the piezoelectric ceramic piece generates high-frequency vibration under the action of the high-frequency pulse voltage signal, and the high-frequency vibration propagates in the carbon fiber reinforced composite material-concrete composite member in the form of piezoelectric stress wave, so that the piezoelectric ceramic piece functional element array generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
Specifically, the amplified sinusoidal pulse voltage signal is input to the PZT driving end through the coaxial shielding lead, and due to the inverse piezoelectric effect of the piezoelectric material, the PZT driving end generates high-frequency vibration along the thickness direction thereof under the action of a high-frequency excitation signal, and the high-frequency vibration is transmitted in the CFRP-concrete combined member in the form of stress waves. Under the action of the piezoelectric stress wave, 32 groups of PZT functional element arrays at the receiving end generate time domain voltage signals with different peak values under the action of the piezoelectric ceramic direct piezoelectric effect.
Further, the waveform of the first functional element in the 32 sets of PZT functional element arrays is inputted into an oscilloscope through a coaxial shielded conductor to check whether the device connection is abnormal.
In step S103, time domain voltage signals of different channels are acquired by a multi-channel data acquisition device, and data analysis is performed on the acquired time domain voltage signals according to a multi-channel surface wave analysis method to complete damage detection.
Specifically, data of time domain voltage signals of different peak values are acquired through high-precision multi-channel data acquisition equipment, 32 groups of PZT functional element arrays are all connected to the data acquisition equipment through coaxial shielded wires for synchronous acquisition and recording, and finally data processing and analysis are carried out at a computer terminal.
The high-precision data acquisition equipment needs to meet the requirement of data acquisition of voltage signals with the main frequency of 500kHz and realize synchronous acquisition of 32 groups of PZT functional element arrays.
The detection method has the advantages that the PZT driving end generates high-frequency vibration under the action of a high-frequency excitation voltage signal, the PZT functional element array is excited by piezoelectric stress waves to generate a voltage signal, and the detection of the CFRP-concrete interface peeling damage is realized by combining a high-performance data acquisition system and multi-surface wave analysis.
Further, in an embodiment of the present invention, the data analysis of the acquired time-domain voltage signal according to a multi-channel surface wave analysis method to complete the damage detection specifically includes:
F-K forward modeling analysis is carried out on data of time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, attributes of surface waves propagating in the carbon fiber reinforced composite material-concrete combined member are identified, and damage identification is achieved through comparison with theoretical Lamb waves and Rayleigh waves.
Further, in an embodiment of the present invention, the data analysis of the acquired time-domain voltage signal according to a multi-channel surface wave analysis method to complete the damage detection specifically includes:
the starting point and the terminal point of the interface stripping defect in the carbon fiber reinforced composite material-concrete combined member are judged through the change of the amplitude coaxial characteristic of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, so that the damage positioning is realized.
Specifically, amplitude of a time domain voltage signal of the 32-channel acquisition equipment and a change trend of the time domain voltage signal corresponding to the amplitude are compared and analyzed, and identification of a starting point and an end point of the stripping area is achieved according to the coaxial characteristic of the peak value of the voltage signal. Through forward analysis of output signals of 32 groups of piezoelectric sensors, a dispersion image of the piezoelectric sensors is obtained, and is compared with theoretical dispersion curves of Lamb waves and Rayleigh waves, attributes of surface waves in CFRP are identified, and then interface peeling defects are identified.
In summary, the high-performance computer controls the signal generating device to generate a voltage signal, the voltage signal is amplified by the voltage amplifier, the amplified waveform is displayed on the oscilloscope, and then the pulse voltage signal is input to the PZT driving end to generate high-frequency vibration. The piezoelectric stress wave propagates in the CFRP-concrete composite member and causes ultrasonic vibration of the piezoelectric sensor array, thereby generating a voltage signal. And synchronously acquiring voltage signals output by the PZT sensor array by adopting multi-channel high-precision data acquisition equipment, and storing the voltage signals in a computer. The position of interface damage in the CFRP-combined component can be judged through characteristic parameter analysis of time-course signals output by the PZT functional element array, and the stress wave attribute is judged by combining forward analysis of the time-course signals, so that double identification of interface peeling defects is realized.
The nondestructive testing method based on the piezoelectric ceramic multi-surface wave analysis is described in detail below with reference to specific embodiments and drawings, and mainly comprises a hardware acquisition device and the multi-surface wave analysis, so that the defect of CFRP-concrete interface peeling is efficiently identified, and the monitoring cost can be reduced.
As shown in fig. 2, the CFRP-concrete composite member generally comprises CFRP cloth or sheet 1, adhesive 2 and concrete 3, and is prone to interface peeling defects 4 due to adhesive layer processing errors or long-term reciprocating loading.
As shown in fig. 3, the high frequency vibrations will propagate in the CRRP-concrete in the form of stress waves under the influence of an external pulse excitation P (high frequency vibration signal). The stress wave enters the CFRP material in the form of a transmitted wave a, a reflected wave b is formed between the CFRP and the bonding layer interface i, a part of the transmitted wave c is transmitted to the bonding layer and a reflected wave d is formed at the interface j of the bonding layer and the concrete, and a part of the stress wave is transmitted in the concrete in the form of a transmitted wave e. The high frequency vibrations continue to propagate in the component in the form of Rayleigh waves f and stress waves g propagating in the CFRP and stress waves h propagating in the bond coat.
As shown in fig. 4, in order to realize efficient identification of the interface peeling defect 4 between the CFRP1, the bonding layer 2 and the concrete 3, the multichannel data acquisition method based on the multichannel surface wave analysis is composed of a PZT driving end a and a 32-channel PZT functional element array b, and is connected to a multichannel data acquisition system 6 through a coaxial shielded wire 5.
As shown in fig. 5, the PZT driving end a and the 32-channel PZT functional element b are mainly composed of a BNC connector, a coaxial shielding wire, and a circular piezoelectric ceramic piece, and the zero line and the live line of the shielding wire are respectively welded to the positive electrode and the negative electrode of the piezoelectric ceramic piece.
As shown in fig. 6, the system of the nondestructive testing method based on the multi-channel surface wave analysis of piezoelectric ceramics mainly comprises a high-performance computer ①, a signal generator ②, a voltage amplifier ③, an oscilloscope ④, a CFRP-concrete combined member ⑤ and a data acquisition system ⑥.
The working process is that the high-performance computer ① controls a signal generator ② to excite a pulse voltage signal with a specific frequency through a lead I, the pulse voltage signal is input into a voltage amplifier ③ through a lead II to amplify the amplitude of the signal, and is connected with an oscilloscope ④ through a lead III to check the voltage waveform, the amplified voltage signal is connected with a PZT driving end a through a coaxial shielding lead IV to excite a high-frequency vibration signal, the voltage signal generated by a 32-channel PZT functional element b is connected to a data acquisition system ⑥ through a coaxial shielding lead V under the action of a high-frequency stress wave, and finally the acquired voltage signal is input into the high-performance computer through a lead VI to be stored and subjected to data analysis.
The instrument has simple composition, the PZT functional elements are convenient to process and manufacture and have low cost, the instrument is convenient for batch production in factories, the identification precision of the interface peeling defect can be realized by combining a multi-channel surface wave analysis method due to the adoption of a multi-channel sensor array mode, and the instrument can be conveniently applied to large-scale practical engineering structures due to the fact that sensors are not required to be pre-embedded in CFRP-concrete combined members.
As shown in fig. 7, the data processing of the collected time domain voltage signals with different peak values mainly includes the following steps:
1) step 1: acquiring data of each channel of the PZT functional element array;
2) step 2: converting the original data into SG2 format and checking the waveform;
3) and step 3: analyzing the characteristic parameters of the SG2 format time-course curve, and identifying the starting point and the end point of the interface peeling defect according to the amplitude coaxial characteristic;
4) and 4, step 4: forward analysis based on the F-K transform;
5) and 5: extracting a basic mode M0;
6) step 6: and comparing forward analysis M0 with theoretical Rayleigh wave and Lamb wave frequency dispersion curves, identifying the stress wave property and identifying the interface peeling damage.
The data analysis method can avoid misjudgment of the detection result, not only can judge the specific position of the cross-section peeling defect through the time domain voltage signal waveform output by the functional element array, but also can identify the attribute of the stress wave through forward analysis of the time domain signal, thereby realizing double-layer identification of the interface peeling defect.
According to the nondestructive testing method for the multi-channel surface wave analysis based on the piezoelectric ceramics, which is provided by the embodiment of the invention, the piezoelectric ceramics PZT is pasted on the outer side of the CFRP, and a data acquisition mode of the multi-channel surface wave analysis is formed by 32 groups of PZT intelligent materials. The position of the CFRP-concrete interface peeling defect can be judged through characteristic parameter analysis of time-course signals output by the PZT functional element array, and the stress wave attribute is judged by combining forward analysis of the time-course signals, so that the interface peeling defect is dually identified, the detection cost is low, and the identification precision of the interface peeling defect is high.
Next, a nondestructive testing system based on multi-channel surface wave analysis of piezoelectric ceramics according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 8 is a schematic structural diagram of a nondestructive testing system based on multi-surface wave analysis of piezoelectric ceramics according to an embodiment of the present invention.
As shown in fig. 8, the piezoelectric ceramic-based nondestructive testing system for multi-channel surface wave analysis includes: an amplification module 100, a generation module 200 and a detection module 300.
The amplifying module 100 is configured to control the signal generator to generate a sinusoidal pulse voltage signal, and amplify the sinusoidal pulse voltage signal through the voltage amplifier.
The generation module 200 is used for connecting the amplified sinusoidal pulse voltage signal to a piezoelectric ceramic piece driving end attached to the surface of the carbon fiber reinforced composite material-concrete combined component, the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and propagates in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, and the piezoelectric ceramic piece functional element array at the receiving end generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
The detection module 300 is configured to collect time-domain voltage signals of different channels through a multi-channel data collection device, and perform data analysis on the collected time-domain voltage signals according to a multi-channel surface wave analysis method to complete damage detection.
The detection system 10 has the advantages of convenient instrument installation and high detection precision, and can realize the identification and the positioning of the interface stripping defect of the CFRP-concrete combined member.
Further, in an embodiment of the present invention, the method further includes: an output module for outputting the output signals of the first and second modules,
the output module is used for outputting the amplified sinusoidal pulse voltage signal to an oscilloscope through a coaxial shielded wire and detecting the waveform of the amplified sinusoidal pulse voltage signal;
and the output module is also used for outputting the waveform of the first functional unit in the piezoelectric ceramic chip functional element array to an oscilloscope through a coaxial shielding wire so as to detect whether the line connection is abnormal or not.
Further, in one embodiment of the present invention, the detection module, in particular for,
F-K forward modeling analysis is carried out on data of time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, attributes of surface waves propagating in the carbon fiber reinforced composite material-concrete combined member are identified, and damage identification is achieved through comparison with theoretical Lamb waves and Rayleigh waves.
Further, in one embodiment of the present invention, the detection module, in particular for,
the starting point and the terminal point of the interface stripping defect in the carbon fiber reinforced composite material-concrete combined member are judged through the change of the amplitude coaxial characteristic of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, so that the damage positioning is realized.
Further, in one embodiment of the invention, the generating module is specifically configured to,
the amplified sinusoidal pulse voltage signal is input to the piezoelectric ceramic piece driving end through the coaxial shielding lead, and due to the inverse piezoelectric effect of the piezoelectric material in the piezoelectric ceramic piece driving end, the piezoelectric ceramic piece driving end generates high-frequency vibration under the action of the high-frequency pulse voltage signal, and the high-frequency vibration is transmitted in the carbon fiber reinforced composite material-concrete combined member in the form of piezoelectric stress waves, so that the piezoelectric ceramic piece functional element array generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
It should be noted that the foregoing explanation of the embodiment of the nondestructive testing method based on multichannel surface wave analysis of piezoelectric ceramics also applies to the system of this embodiment, and details are not repeated here.
According to the nondestructive testing system for the multi-channel surface wave analysis based on the piezoelectric ceramics, which is provided by the embodiment of the invention, the piezoelectric ceramics PZT is pasted on the outer side of the CFRP, and a data acquisition mode of the multi-channel surface wave analysis is formed by 32 groups of PZT intelligent materials. The position of the CFRP-concrete interface peeling defect can be judged through characteristic parameter analysis of time-course signals output by the PZT functional element array, and the stress wave attribute is judged by combining forward analysis of the time-course signals, so that the interface peeling defect is dually identified, the detection cost is low, and the identification precision of the interface peeling defect is high.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A nondestructive testing method based on multi-channel surface wave analysis of piezoelectric ceramics is characterized by comprising the following steps:
the control signal generator generates a sine pulse voltage signal, and the sine pulse voltage signal is amplified through a voltage amplifier;
the amplified sinusoidal pulse voltage signal is connected to a piezoelectric ceramic piece driving end which is attached to the surface of the carbon fiber reinforced composite material-concrete combined component, the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and is transmitted in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, and a piezoelectric ceramic piece functional element array at a receiving end generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect;
collecting the time domain voltage signals of different channels through a multi-channel data collecting device, and performing data analysis on the collected time domain voltage signals according to a multi-channel surface wave analysis method to finish damage detection;
the data analysis is performed on the acquired time domain voltage signals according to a multi-channel surface wave analysis method to complete damage detection, and the method specifically comprises the following steps:
F-K forward modeling analysis is carried out on data of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, the attribute of a surface wave propagating in the carbon fiber reinforced composite material-concrete combined member is identified, and damage identification is realized by comparing the attribute with theoretical Lamb waves and Rayleigh waves;
and judging the starting point and the ending point of the interface stripping defect in the carbon fiber reinforced composite material-concrete combined member according to the change of the amplitude coaxial characteristic of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, thereby realizing damage positioning.
2. The method of claim 1, further comprising:
outputting the amplified sinusoidal pulse voltage signal to an oscilloscope through a coaxial shielded wire, and detecting the waveform of the amplified sinusoidal pulse voltage signal;
and outputting the waveform of the first functional unit in the piezoelectric ceramic chip functional element array to an oscilloscope through a coaxial shielding wire so as to detect whether the line connection is abnormal.
3. The method of claim 1,
the amplified sine pulse voltage signal is input to the piezoelectric ceramic piece driving end through a coaxial shielding wire, and due to the inverse piezoelectric effect of a piezoelectric material in the piezoelectric ceramic piece driving end, the piezoelectric ceramic piece driving end generates high-frequency vibration under the action of the high-frequency pulse voltage signal, and the high-frequency vibration is transmitted in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, so that the piezoelectric ceramic piece functional element array generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
4. A nondestructive testing system based on multi-channel surface wave analysis of piezoelectric ceramics, comprising:
the amplifying module is used for controlling the signal generator to generate a sinusoidal pulse voltage signal and amplifying the sinusoidal pulse voltage signal through the voltage amplifier;
the generating module is used for accessing the amplified sinusoidal pulse voltage signal to a piezoelectric ceramic piece driving end which is pasted on the surface of the carbon fiber reinforced composite material-concrete combined component, the piezoelectric ceramic piece generates ultrasonic vibration under the inverse piezoelectric effect and propagates in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, and a piezoelectric ceramic piece functional element array at a receiving end generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect;
the detection module is used for acquiring the time domain voltage signals of different channels through multi-channel data acquisition equipment and performing data analysis on the acquired time domain voltage signals according to a multi-channel surface wave analysis method to finish damage detection;
the detection module is specifically configured to, in response to the detection signal,
F-K forward modeling analysis is carried out on data of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, the attribute of a surface wave propagating in the carbon fiber reinforced composite material-concrete combined member is identified, and damage identification is realized by comparing the attribute with theoretical Lamb waves and Rayleigh waves;
and judging the starting point and the ending point of the interface stripping defect in the carbon fiber reinforced composite material-concrete combined member according to the change of the amplitude coaxial characteristic of the time domain voltage signals with different peak values output by the piezoelectric ceramic chip functional element array, thereby realizing damage positioning.
5. The system of claim 4, further comprising: an output module for outputting the output signals of the first and second modules,
the output module is used for outputting the amplified sinusoidal pulse voltage signal to an oscilloscope through a coaxial shielded wire and detecting the waveform of the amplified sinusoidal pulse voltage signal;
and the output module is also used for outputting the waveform of the first functional unit in the piezoelectric ceramic chip functional element array to an oscilloscope through a coaxial shielding wire so as to detect whether the line connection is abnormal or not.
6. System according to claim 4, characterized in that the generation module, in particular for,
the amplified sine pulse voltage signal is input to the piezoelectric ceramic piece driving end through a coaxial shielding wire, and due to the inverse piezoelectric effect of a piezoelectric material in the piezoelectric ceramic piece driving end, the piezoelectric ceramic piece driving end generates high-frequency vibration under the action of the high-frequency pulse voltage signal, and the high-frequency vibration is transmitted in the carbon fiber reinforced composite material-concrete combined component in the form of piezoelectric stress waves, so that the piezoelectric ceramic piece functional element array generates time domain voltage signals with different peak values under the action of the piezoelectric ceramic positive piezoelectric effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277115.8A CN109959711B (en) | 2019-04-08 | 2019-04-08 | Piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277115.8A CN109959711B (en) | 2019-04-08 | 2019-04-08 | Piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109959711A CN109959711A (en) | 2019-07-02 |
| CN109959711B true CN109959711B (en) | 2020-03-27 |
Family
ID=67025806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910277115.8A Active CN109959711B (en) | 2019-04-08 | 2019-04-08 | Piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109959711B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029834A (en) * | 2021-03-12 | 2021-06-25 | 清华大学 | Detection method and system for FRP-concrete structure interface of fiber reinforced composite material |
| CN114061810B (en) * | 2021-11-03 | 2023-07-25 | 重庆大学 | Three-dimensional stress wave propagation monitoring device and method |
| CN114993525B (en) * | 2022-07-01 | 2023-04-07 | 西安交通大学 | Deformable immersion pressure sensor based on conduction characteristics of ultrasonic waves on particle materials |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012100153A1 (en) * | 2011-01-20 | 2012-07-26 | Northeastern University | Real-time pavement profile sensing system using air-coupled surface wave |
| CN103616714B (en) * | 2013-11-19 | 2016-03-30 | 长安大学 | Rayleigh Wave Underground cavity boundary method |
| CN108829637B (en) * | 2018-05-22 | 2022-02-01 | 武汉市市政建设集团有限公司 | Surface wave cross-spectrum analysis phase folding identification and phase unfolding correction method |
-
2019
- 2019-04-08 CN CN201910277115.8A patent/CN109959711B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109959711A (en) | 2019-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109959711B (en) | Piezoelectric ceramic-based nondestructive testing method and system for multi-channel surface wave analysis | |
| CN107748200B (en) | A kind of weld defect detection piezoelectric-array formula flexible sensor and detection method based on feature guided wave | |
| CN101539541B (en) | Detection method of thick beam structure damage based on guide wave | |
| CN109959712B (en) | Real-time monitoring system for bonding and sliding of steel-concrete composite structure interface | |
| CN103852492A (en) | Monitoring method for grouting compaction of pre-stressed pipe based on piezoelectric ceramic | |
| CN202256264U (en) | Sound emission device for detecting damage failure of carbon fiber composite material | |
| CN107462637A (en) | Ultrasonic echo detection method and device | |
| CN101839894B (en) | Digital ultrasonic flaw detection system and method | |
| CN102393445A (en) | Pipeline structure damage monitoring method based on piezoelectric ceramic sensor and guide wave analysis | |
| CN112630307A (en) | Modular array element piezoelectric ceramic ultrasonic guided wave detection device and detection method | |
| CN111521681A (en) | Concrete internal damage assessment method based on piezoelectric ceramic shear wave energy loss | |
| CN110118829A (en) | A kind of test macro and method of the amplitude-frequency characteristic of acoustic emission sensor | |
| CN108680641A (en) | Flexible array sensor based on vortex with ULTRASONIC COMPLEX | |
| CN107632069B (en) | Concrete beam reinforcement steel plate stripping detection system and detection method | |
| CN106124623A (en) | Sheet metal micro-crack identification and alignment system and detection method based on this system | |
| CN107576384A (en) | On-line monitoring system and method for cracks L amb wave of hoisting equipment | |
| CN111238702A (en) | Bolt axial stress testing device and testing method based on ultrasonic measurement | |
| CN105651862B (en) | A kind of device and method that damage check being carried out to composite material using blue nurse guided wave | |
| CN211783988U (en) | Bolt axial stress testing device based on ultrasonic measurement | |
| CN201724930U (en) | Multimodal ultrasonic flaw detector system | |
| CN210427470U (en) | Test system for amplitude-frequency characteristic of acoustic emission sensor | |
| CN103293223A (en) | Characteristic guided wave based butt weld nondestructive testing system | |
| CN109798973B (en) | Method for testing natural frequency of non-contact ultrasonic transducer | |
| CN112946078B (en) | Composite material bonding quality evaluation and early damage identification method and system | |
| CN114252478A (en) | Ultrasonic infrared thermal imaging detection system and detection method for carbon fiber close fitting defect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |