Concrete-filled steel tube interface stripping detection device, application method thereof and detection system

Abstract

The invention discloses a concrete filled steel tube interface stripping detection device, a use method thereof and a detection system, and belongs to the field of concrete filled steel tube interface stripping detection. The detection device comprises at least two magnetic adsorption probes with impedance matching layers and magnetic adsorption layers, a probe fixer for fixing the magnetic adsorption probes and an operation panel connected with the magnetic adsorption probes, and the magnetic adsorption probes are adsorbed on test points of a concrete filled steel tube interface. And performing stripping detection on the test point through the operation panel. According to the magnetic adsorption design method, a binding agent is not needed to enhance the coupling effect of the sensor and the outer wall of the steel pipe, so that a test area is more flexible, and the detection efficiency of a construction site is improved; meanwhile, the impedance matching layer is additionally arranged in the magnetic adsorption probe, so that ultrasonic stress wave signals in the concrete filled steel tube can be accurately captured, and the detection precision is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of detecting the interface peeling of concrete-filled steel tubes, and particularly relates to a detecting device for the interface peeling of concrete-filled steel tubes, a using method thereof, and a detecting system. Background Art

[0002] With the increasing requirements for bearing capacity, the cross-sectional size of concrete-filled steel tubes continues to increase. Construction techniques, shrinkage during concrete hardening, hydration heat, and extreme loads may all cause defects in concrete-filled steel tube structures, especially the interface peeling defect between the steel tube and the concrete, thereby reducing the mechanical properties of the concrete-filled steel tube structure. Therefore, exploring an effective non-destructive testing method for the interface peeling of concrete-filled steel tubes is of great significance, which is not only crucial for evaluating the health status of the completed concrete-filled steel tube structures, but also conducive to further promoting the engineering application of concrete-filled steel tube structures.

[0003] For defect detection in concrete-filled steel tubes, common non-destructive testing methods include infrared thermography, X-ray method, impact echo method, electromechanical impedance method, and ultrasonic testing, etc. Although infrared thermography can quickly detect the surface temperature distribution of the steel tube, it has limited detection of deep defects and is easily affected by the environment; the X-ray method provides a penetration view, but there are radiation risks and high equipment costs; the impact echo method is suitable for measuring the thickness of concrete and locating defects, but requires professional knowledge in signal interpretation and has poor detection effect on deep defects; the electromechanical impedance method can effectively evaluate the structural health status, but depends on the precise arrangement of sensors, coupling conditions, and complex data processing; while ultrasonic testing is widely used in the identification of concrete-filled steel tube defects, but generally has the disadvantages that the ultrasonic probe does not consider impedance matching or the piezoelectric ceramic sheet depends on adhesives and is not easy to install, there are challenges in detecting fine defects and detection efficiency, and requires experienced operators.

[0004] In the existing testing methods based on ultrasonic probes, the force of each manual pressing of the probe will cause errors in the measurement results. For the paste-type piezoelectric ceramic sensors, due to the inability to ensure the consistency of the amount of glue used each time and the bonding interface, the ultrasonic wave propagation is greatly affected by the paste glue, the propagation mechanism is complex, an irregular bonding layer is introduced artificially, the conductivity is low, and different sensors cannot be calibrated after pasting, which also greatly increases the measurement error. Moreover, the installation process is complex, it is difficult to form a scanning array, the testing accuracy is low, and it cannot meet the requirements of actual engineering applications. Summary of the Invention

[0005] The present invention proposes a detecting device for the interface peeling of concrete-filled steel tubes, a using method thereof, and a detecting system to solve the above technical problems existing in the prior art.

[0006] To achieve the above object, the present invention provides a detecting device for the interface peeling of concrete-filled steel tubes, including:

[0007] At least two magnetic adsorption probes with impedance matching layers and magnetic adsorption layers, a probe holder for fixing the magnetic adsorption probes, and an operation panel connected to the magnetic adsorption probes are provided. The magnetic adsorption probes are adsorbed on the test points of the steel pipe concrete interface, and the test points are subjected to peeling detection through the operation panel.

[0008] Preferably, the magnetic adsorption probe further comprises: a signal shielding layer, an insulating layer, a lead zirconium titanate material layer, a stainless steel shell and a wire.

[0009] Preferably, the operation panel includes: a connector connected to the magnetic adsorption probe, a detection button and a display interface.

[0010] To achieve the above technical objectives, the present invention also provides a method for using a steel tube concrete interface debonding detection device. Based on the above-mentioned steel tube concrete interface debonding detection device, the method includes:

[0011] Adsorbing a plurality of magnetic adsorption probes to the test points of the steel tube concrete interface;

[0012] Fixing the plurality of magnetic adsorption probes based on the probe holder;

[0013] Based on the operation panel, the test point is subjected to peeling detection to obtain an ultrasonic stress wave signal in the steel tube concrete, and peeling detection of the steel tube concrete interface is achieved based on the ultrasonic stress wave signal.

[0014] Preferably, the ultrasonic stress wave signal is displayed on a display page of the operation panel.

[0015] To achieve the above technical objectives, the present invention further provides a detection system for a steel tube concrete interface debonding detection device. Based on the above-mentioned steel tube concrete interface debonding detection device, the detection system comprises:

[0016] A probe adsorption module is used to adsorb a magnetic adsorption probe to a pending test point on the steel tube concrete interface, wherein the magnetic adsorption probe includes an impedance matching layer and a magnetic absorption layer, and there are at least two magnetic adsorption probes;

[0017] A signal excitation module is used to generate an excitation voltage signal and apply the excitation voltage signal to the magnetic probe to obtain an ultrasonic stress wave signal in the steel tube concrete;

[0018] A data acquisition module, configured to receive ultrasonic stress wave signals from the magnetic adsorption probe in the steel tube concrete;

[0019] A data analysis module, which is used to perform outlier analysis on the ultrasonic stress wave signal based on a functional relationship to obtain an analysis result on whether the test points adsorbed on the interface of the concrete-filled steel tube are peeled off.

[0020] Preferably, it further includes a power amplification module, a data storage module, and a result display module; based on the power amplification module, the signal in the signal excitation module is amplified to a high power level; based on the data storage module, the ultrasonic stress wave signal is saved; and based on the result display module, the analysis result is displayed.

[0021] Preferably, the signal excitation module uses a five-peak wave excitation signal with a preset threshold.

[0022] Compared with the prior art, the present invention has the following advantages and technical effects:

[0023] The present invention provides a device for detecting the peeling of the interface of a concrete-filled steel tube, including: at least two magnetic adsorption probes with impedance matching layers and magnetic adsorption layers, a probe fixator for fixing the magnetic adsorption probes, and an operation panel connected to the magnetic adsorption probes. The magnetic adsorption probes are adsorbed on the test points of the interface of the concrete-filled steel tube, and the peeling of the test points is detected through the operation panel. Different from the traditional piezoelectric ceramic sensing method, the magnetic adsorption design method of the present invention does not require an adhesive to enhance the coupling effect between the sensor and the outer wall of the steel tube, thereby making the test area more flexible and improving the detection efficiency at the construction site; at the same time, by adding an impedance matching layer in the magnetic adsorption probe, the ultrasonic stress wave signal in the concrete-filled steel tube can be accurately captured, greatly improving the detection accuracy.

[0024] The present invention also provides a method for using the device for detecting the peeling of the interface of a concrete-filled steel tube, which not only avoids the influence of sensor impedance mismatch, can significantly improve the signal-to-noise ratio of the test signal, and further improves the test accuracy; but also through the test technology adsorbed on the steel tube surface, ensures the consistency of each measurement of the sensor, significantly improves the flexibility of the test range, and further improves the test efficiency.

[0025] The present invention also provides a detection system for the device for detecting the peeling of the interface of a concrete-filled steel tube, which can realize the scanning detection of the peeling defects of the interface of the concrete-filled steel tube, makes up for the application limitations of the inability to perform array detection when using ultrasonic probes and adhesive piezoelectric ceramic sensors on the steel tube surface, improves the dimension and accuracy of the test of the interface defects of the concrete-filled steel tube, and provides help for the convenient construction of large-area construction sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0027] Figure 1 Schematic diagram of the detection device according to an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the magnetic adsorption probe according to an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the operation panel according to an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the detection scenario according to an embodiment of the present invention;

[0031] Figure 5 Visualization diagram of the debonding between steel and concrete interfaces according to an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the operation terminal according to an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of the excitation signal according to an embodiment of the present invention, where Figure 7 (a) is the time-domain diagram, Figure 7 (b) is the frequency-domain diagram;

[0034] Figure 8 Operation flowchart according to an embodiment of the present invention;

[0035] Among them, 1 - detection box, 2 - operation panel, 3 - probe holder, 4 - magnetic adsorption probe, 5 - signal shielding layer, 6 - magnetic adsorption layer, 7 - insulating layer, 8 - lead zirconate titanate material layer, 9 - impedance matching layer, 10 - stainless steel shell, 11 - wire, 12 - connector, 13 - detection button, 14 - display interface, 15 - steel plate, 16 - concrete plate, 17 - cavity. Detailed implementation manners

[0036] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0037] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0038] Embodiment 1

[0039] As Figure 1As shown in the figure, in this embodiment, a steel tube concrete interface peeling detection device is provided, including: at least two magnetic adsorption probes 4 with impedance matching layers and magnetic adsorption layers, a probe holder 3 for fixing the magnetic adsorption probes, and an operation panel 2 connected to the magnetic adsorption probes. The magnetic adsorption probes are adsorbed on the test points of the steel tube concrete interface, and the peeling detection of the test points is carried out through the operation panel 2. Among them, the operation panel 2, the probe holder 3, and the magnetic adsorption probes 4 are all placed in the detection box 1.

[0040] In this embodiment, the steel tube concrete interface peeling detection device is portable.

[0041] Specifically, as Figure 2 shown, the internal structure of the magnetic adsorption probe includes: a signal shielding layer 5, a magnetic adsorption layer 6, an insulating layer 7, a lead zirconate titanate material layer 8, an impedance matching layer 9, a stainless steel shell 10, and a wire 11. Each time the coupling condition between the measurement sensor and the steel pipe surface has a high degree of consistency and a high signal-to-noise ratio, which increases the convenience and accuracy of construction.

[0042] The mathematical principle of the impedance matching layer design of the magnetic adsorption dual probe is:

[0043]

[0044] Among them, Z c and Z p are the acoustic impedances of the steel plate and the lead zirconate titanate material respectively.

[0045] The magnetic adsorption probe further includes: a signal shielding layer, an insulating layer, a lead zirconate titanate material layer, a stainless steel shell, and a wire.

[0046] As Figure 3 shown, the operation panel includes: a connector 12 connected to the magnetic adsorption probe, a detection button 13, and a display interface 14.

[0047] This embodiment provides a steel tube concrete interface peeling detection device, which is different from the traditional piezoelectric ceramic sensing method. The magnetic adsorption design method in this embodiment does not require an adhesive to enhance the coupling effect between the sensor and the outer wall of the steel pipe, so that the test area is more flexible and the detection efficiency at the construction site is improved; at the same time, by adding an impedance matching layer in the magnetic adsorption probe, the ultrasonic stress wave signal in the steel tube concrete can be accurately captured, greatly improving the detection accuracy.

[0048] Embodiment Two

[0049] As Figure 4 shown, this embodiment provides a method for using a steel tube concrete interface peeling detection device, based on the steel tube concrete interface peeling detection device described in Embodiment One, the method includes:

[0050] Adsorbing a plurality of magnetic adsorption probes 4 to the test points of the steel tube concrete interface; wherein the steel tube concrete interface includes: a steel plate 15 and a concrete plate 16, and the test point is a cavity 17;

[0051] Based on the probe holder 3, the plurality of magnetic adsorption probes 4 are fixed;

[0052] Based on the operation panel 2 , the test point is subjected to peeling detection to obtain an ultrasonic stress wave signal in the steel tube concrete, and peeling detection of the steel tube concrete interface is achieved based on the ultrasonic stress wave signal.

[0053] The ultrasonic stress wave signal is displayed on the display page of the operation panel, such as Figure 5 As shown, the display interface can visualize the debonding defects at the steel tube concrete interface.

[0054] This embodiment provides a method for using a steel tube concrete interface debonding detection device, which not only avoids the influence of sensor impedance mismatch, but also significantly improves the signal-to-noise ratio of the test signal, further improving the test accuracy; it also ensures the consistency of each sensor measurement through the test technology of adsorption on the steel tube surface, significantly improves the flexibility of the test range, and further improves the test efficiency.

[0055] Example 3

[0056] This embodiment provides a detection system for a steel tube concrete interface debonding detection device. Based on the steel tube concrete interface debonding detection device described in Example 1, the detection system includes:

[0057] A probe adsorption module is used to adsorb a magnetic adsorption probe to a pending test point on the steel tube concrete interface, wherein the magnetic adsorption probe includes an impedance matching layer and a magnetic absorption layer, and there are at least two magnetic adsorption probes;

[0058] a signal excitation module, configured to generate an excitation signal and excite the magnetic adsorption probe to emit an ultrasonic stress wave based on the excitation signal;

[0059] A data acquisition module, configured to receive ultrasonic stress wave signals from the magnetic adsorption probe in the steel tube concrete;

[0060] The data analysis module is used to analyze the ultrasonic stress wave signal based on a functional relationship to obtain an analysis result of whether the test point adsorbed on the steel tube concrete interface is peeled off.

[0061] The detection system further includes a power amplification module, a data storage module, and a result display module; based on the power amplification module, the signal in the signal excitation module is amplified to a high power level; based on the data storage module, the ultrasonic stress wave signal is saved; based on the result display module, the analysis result is displayed, as Figure 6 shown,

[0062] the signal excitation module uses a five-peak wave excitation signal with a preset threshold, as Figure 7 shown. To ensure the signal-to-noise ratio of the received signal and comprehensively consider the optimal resonance frequency of the concrete-filled steel tube composite structure, in this embodiment, a five-peak wave excitation signal with a frequency near 250 kHz is selected. Figure 7 (a) is the time-domain diagram, Figure 7 (b) is the frequency-domain diagram.

[0063] The operation flow chart of the detection system in this embodiment is as Figure 8 shown. First, according to the size of the interface area of the concrete-filled steel tube to be measured, the test grid is divided, the test points are marked, and the test is started through the concrete-filled steel tube interface peeling detection device. Parameter settings are performed on the operation panel 2, including the signal excitation waveform and the sampling interval, and the start detection button 13 is clicked. The signal excitation module excites a voltage signal according to the set parameters, and the power amplification of the voltage signal is realized through the power amplification module. The amplified excitation voltage signal acts on the magneto-electric probe and the internal lead zirconate titanate material layer, causing the lead zirconate titanate material layer to generate an inverse piezoelectric effect. Through the conversion from electrical energy to mechanical energy, ultrasonic stress waves are generated in the concrete-filled steel tube structure to be measured. The receiving probe of the magneto-electric probe receives the ultrasonic stress waves, and this process can be used to check the waveform of the receiving probe by connecting an oscilloscope. The data acquisition module acquires and stores the ultrasonic stress wave signals sensed by the receiving probe. The abnormal value analysis of the ultrasonic stress wave signals can be performed through the data analysis module. Whether there is peeling at the interface of the concrete-filled steel tube to be measured is judged through the analysis result. If there is peeling, the detailed information of the peeling damage is output on the control panel and the detection is ended. If no peeling is detected through the abnormal value analysis, the measurement point is replaced, and the detection process of excitation-reception continues to traverse all measurement points.

[0064] The present invention provides a detection system for a concrete-filled steel tube interface peeling detection device, which can realize the scanning detection of the concrete-filled steel tube interface peeling defect, makes up for the application limitations of the inability to perform array detection when using ultrasonic probes and adhesive piezoelectric ceramic sensors on the steel tube surface, improves the dimension and accuracy of the concrete-filled steel tube interface defect test, and provides help for the convenient construction of large-area construction sites.

[0065] As described above, it is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for detecting the interface peeling of concrete-filled steel tubes, characterized in that Including: At least two magnetic adsorption probes with impedance matching layers and magnetic adsorption layers, a probe holder for fixing the magnetic adsorption probes, and an operation panel connected to the magnetic adsorption probes. The magnetic adsorption probes are adsorbed on the test points of the steel tube concrete interface, and the test points are subjected to peeling detection through the operation panel.

2. The steel tube concrete interface peeling detection device according to claim 1, characterized in that, The magnetic adsorption probe further includes: a signal shielding layer, an insulating layer, a lead zirconate titanate material layer, a stainless steel housing, and a wire.

3. The steel tube concrete interface peeling detection device according to claim 1, characterized in that The operation panel includes: a connector connected to the magnetic adsorption probe, a detection button, and a display interface.

4. A method for using a detection device for interfacial peeling of concrete-filled steel tubes, characterized in that, Based on the steel tube concrete interface peeling detection device according to any one of claims 1-3, the method includes: Adsorbing a plurality of magnetic adsorption probes on the test points of the steel tube concrete interface; Fixing the plurality of magnetic adsorption probes based on the probe holder; Performing peeling detection on the test points based on the operation panel to obtain an ultrasonic stress wave signal in the steel tube concrete, and realizing the peeling detection of the steel tube concrete interface based on the ultrasonic stress wave signal.

5. The method for using the steel tube concrete interface peeling detection device according to claim 4, characterized in that The ultrasonic stress wave signal is displayed on the display page of the operation panel.

6. The detection system of an interface peeling detection device for concrete-filled steel tubes, characterized in that, Based on the steel tube concrete interface peeling detection device according to any one of claims 1-3, the detection system includes: A probe adsorption module for adsorbing a magnetic adsorption type probe on a to-be-determined test point of the steel tube concrete interface, wherein the magnetic adsorption probe includes an impedance matching layer and a magnetic adsorption layer, and there are at least two magnetic adsorption probes; A signal excitation module for generating an excitation voltage signal and applying the excitation voltage signal to the magnetic adsorption type probe to obtain an ultrasonic stress wave signal in the steel tube concrete; A data acquisition module for receiving the ultrasonic stress wave signal of the magnetic adsorption probe in the steel tube concrete; A data analysis module for performing outlier analysis on the ultrasonic stress wave signal based on a functional relationship to obtain an analysis result on whether the test point adsorbed on the steel tube concrete interface is peeled off.

7. The detection system of the steel tube concrete interface peeling detection device according to claim 6, characterized in that, It further includes a power amplification module, a data storage module, and a result display module; based on the power amplification module, the signal in the signal excitation module is amplified to a high power level; based on the data storage module, the ultrasonic stress wave signal is saved; based on the result display module, the analysis result is displayed.

8. The detection system of the steel tube concrete interface peeling detection device according to claim 6, characterized in that, The signal excitation module uses a five-peak wave excitation signal with a preset threshold.

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