Sleeve grouting material compactness detection test device

Abstract

The utility model relates to the field of assembly type building detection, in particular to a sleeve grouting material compactness detection test device which comprises a control analysis assembly, a first detection assembly and a second detection assembly, and the first detection assembly and the second detection assembly are both electrically connected with the control analysis assembly. The first detection assembly and the second detection assembly are both connected to a steel bar sleeve, and a grouting material is poured into the steel bar sleeve; according to the utility model, the first detection assembly and the second detection assembly are arranged, the steel bar sleeve is detected through the first detection assembly and the second detection assembly at the same time, and the first detection assembly adopts a metal probe installed in the steel bar sleeve to realize detection of current signal intensity; the second detection assembly adopts a detachable ultrasonic transmitter and a detachable ultrasonic receiver to realize ultrasonic detection; and nondestructive testing of the reinforcing steel bar sleeve is realized.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building testing, specifically to a test device for testing the density of grouting material in sleeves. Background Technology

[0002] With the rapid development of society and the continuous progress of science and technology, traditional cast-in-place construction technology is gradually failing to meet the development needs of the construction industry due to unreasonable resource allocation, low level of construction mechanization, poor construction working environment, and high carbon emissions.

[0003] Prefabricated buildings refer to buildings where a large amount of on-site work in traditional construction methods is transferred to factories. Building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) are processed and manufactured in factories, transported to the construction site, and assembled and installed on-site using reliable connection methods.

[0004] As a crucial form of connection between rebar sleeves and building structures, the stability of the sleeve's performance directly impacts the overall structural stability. A key influencing factor is the density of the grouting material within the sleeve. Incomplete grouting, failing to fully fill the sleeve, creates defects and cavities, significantly affecting the connection performance. Currently, commonly used methods for testing the density of sleeve grouting materials fall into two categories: destructive testing and non-destructive testing. Destructive testing includes uniaxial tensile testing, high-stress repeated tensile-compression testing, and large-deformation repeated tensile-compression testing. These methods only assess the quality of the connection but cannot identify or pinpoint defects, hindering targeted reinforcement by construction personnel. Non-destructive testing includes ultrasonic testing, infrared thermal imaging, impact echo methods, and industrial CT scans. The first three methods only provide a vague assessment of the grouting material's density and the location of defects, offering lower precision. While industrial CT can accurately acquire images of the internal structure, density, and defect distribution of grouting material in sleeves, enabling the detection of grout density in grouting metal sleeves, the equipment is too large and the cost is too high, so it is not used in actual testing processes. Utility Model Content

[0005] To address the problems of damaging steel bar sleeves, inaccurately determining the location of defects in sleeve grout, high testing costs, and difficult testing methods, this utility model provides a sleeve grout density testing device.

[0006] This utility model is achieved through the following technical solution:

[0007] A test device for testing the compactness of grouting material in a sleeve includes: a control and analysis component, a first detection component, and a second detection component. The first detection component and the second detection component are both electrically connected to the control and analysis component. The first detection component and the second detection component are both connected to a rebar sleeve, and grouting material is injected into the rebar sleeve.

[0008] The first detection component is used to detect the current signal of the grout inside the rebar sleeve; the second detection component is used to detect the ultrasonic signal of the grout inside the rebar sleeve.

[0009] Specifically, the first detection component includes: a current signal transmitting end, a current signal receiving end, and a metal probe group. The metal probe group is fixedly installed inside the steel bar sleeve. The current signal transmitting end is electrically connected to the control and analysis component through a first wire. The current signal transmitting end is electrically connected to the first end of the metal probe group. The second end of the metal probe group is electrically connected to the current signal receiving end. The current signal receiving end is electrically connected to the control and analysis component through a second wire.

[0010] Specifically, the metal probe group includes multiple metal probes, all of which are disposed inside the steel bar sleeve. The lengths of the multiple metal probes are different. The first end of the multiple metal probes is electrically connected to the current signal transmitting end, and the second end of the metal probes is electrically connected to the current signal receiving end. The current signal intensity corresponding to different metal probes is distinguished.

[0011] Optionally, the central axis of the metal probe is arranged parallel to the central axis of the steel bar sleeve, and the first end faces of the plurality of metal probes coincide.

[0012] Specifically, the second detection component includes an ultrasonic transmitter and an ultrasonic receiver. The ultrasonic transmitter is disposed at the first end of the rebar sleeve and transmits ultrasonic signals into the rebar sleeve. The ultrasonic receiver is disposed at the second end of the rebar sleeve and receives ultrasonic signals attenuated by the grouting material inside the rebar sleeve.

[0013] Both the ultrasonic transmitter and the ultrasonic receiver are electrically connected to the control and analysis component.

[0014] Specifically, the ultrasonic transmitter generates ultrasonic signals in different frequency bands.

[0015] Specifically, the control and analysis component includes a control module and an analysis module. The control module is electrically connected to the current signal transmitter and the ultrasonic transmitter, and the analysis module is electrically connected to the control module, the current signal receiver, and the ultrasonic receiver.

[0016] The analysis module is used to receive the current signal intensity and plot the current curve. The X-axis of the current curve represents different positions of the rebar sleeve, and the Y-axis of the current curve represents the current signal intensity at different positions of the rebar sleeve.

[0017] The analysis module is also used to receive the ultrasonic signal and plot the ultrasonic curve, where the X-axis of the ultrasonic curve represents time and the Y-axis represents the ultrasonic signal intensity.

[0018] Furthermore, the control analysis component also includes a comparison module, which has a built-in trained machine learning model that analyzes current curves and ultrasonic curves by inputting them into the machine learning model.

[0019] Furthermore, the device also includes a printer electrically connected to the control and analysis component, and the printer prints out a QR code containing detection-related information.

[0020] Optionally, both the control and analysis components and the printer are housed within a portable case.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] This invention employs a first detection component and a second detection component to simultaneously inspect the rebar sleeve. The first detection component uses a metal probe installed inside the rebar sleeve to detect the current signal intensity; the second detection component uses a detachable ultrasonic transmitter and receiver to detect ultrasonic waves. Both components enable non-destructive testing of the rebar sleeve, and the two test results can be compared and analyzed, greatly improving the accuracy of the test results. This allows for precise detection of the grout density of the sleeve and accurate location of defects. Attached Figure Description

[0023] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of a sleeve grout density testing device according to the present invention.

[0025] Reference numerals: 1-Control and analysis component, 2-Current signal transmitter, 3-Metal probe group, 4-Ultrasonic transmitter, 5-Ultrasonic receiver, 6-Printer, 7-QR code, 8-First wire, 9-Second wire. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0027] It should also be noted that, for ease of description, only the parts relevant to this utility model are shown in the accompanying drawings.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Where there is no conflict, the embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] like Figure 1 As shown, a test device for testing the compactness of grouting material in a sleeve is provided, comprising: a control and analysis component 1, a first detection component and a second detection component, both of which are electrically connected to the control and analysis component 1 and both of which are connected to a steel sleeve, wherein grouting material is injected into the steel sleeve.

[0033] The first detection component is used to detect the current signal of the grout inside the rebar sleeve; the second detection component is used to detect the ultrasonic signal of the grout inside the rebar sleeve.

[0034] The control and analysis component 1 is responsible for coordinating and managing the work of other detection components, is electrically connected to the first and second detection components, and performs data reception, processing, and analysis.

[0035] The first detection component is responsible for detecting the current signal of the grout inside the rebar sleeve. Specifically, it acquires the intensity of the current signal through a metal probe or other current signal sensing device. The density of the grout may affect the conduction performance of the current signal; for example, areas with higher density may have higher current signal intensity, and vice versa. Therefore, by measuring the current signal intensity at different locations, the density of the grout can be assessed.

[0036] The second detection component is responsible for detecting the density of the grout inside the rebar sleeve using ultrasonic signals. Since denser grout conducts ultrasonic signals more easily, the attenuation of the ultrasonic signal can indirectly reflect the density of the grout. By analyzing the intensity and propagation time of the received ultrasonic signals, the density of the grout at different locations can be assessed.

[0037] Example 2

[0038] The first detection component is described in detail below. The first detection component includes: a current signal transmitting end 2, a current signal receiving end, and a metal probe group 3. The metal probe group 3 is fixedly installed inside the steel sleeve. The current signal transmitting end 2 is electrically connected to the control and analysis component 1 through the first wire 8. The current signal transmitting end 2 is electrically connected to the first end of the metal probe group 3. The second end of the metal probe group 3 is electrically connected to the current signal receiving end. The current signal receiving end is electrically connected to the control and analysis component 1 through the second wire 9.

[0039] The function of the metal probe group 3 is to detect changes in the current signal of the grout by contacting it, thereby reflecting the difference in density. The metal probe group 3 includes multiple metal probes, all of which are installed inside the rebar sleeve. The lengths of the metal probes are all different. The first end of each metal probe is electrically connected to the current signal transmitter 2, and the second end is electrically connected to the current signal receiver. Different metal probes correspond to different current signal intensities. Probes of different lengths can collect current signals at different depths or in different areas, helping to assess the density of the grout at different locations within the sleeve.

[0040] The central axis of the metal probe is set parallel to the central axis of the rebar sleeve, and the first end faces of multiple metal probes coincide.

[0041] In this embodiment, the metal probe assembly 3 is not removed after the casting of the rebar sleeve is completed, so it will not affect the overall structure of the rebar sleeve.

[0042] The strength of the current signal varies depending on the length, position, and contact between the probe and the grout. Denser grout may result in better current signal conduction and thus a higher signal strength; conversely, looser grout may cause signal attenuation and a lower signal strength. By differentiating the current signal strength of different metal probes, the density of the grout at different locations can be indirectly inferred.

[0043] Upon receiving the current intensity signal, the following processing is performed: Control and analysis component 1 plots a curve based on the changes in the emitted and received current signals, with the rebar sleeve area as the X-axis and the current signal intensity as the Y-axis. When the current passes through the metal probe and reaches the dense area of ​​the grout, the current signal will be significantly weakened due to the existence of certain impedance. When the current signal passes through the metal probe, if there is a cavity or loose area near the probe, the impedance will decrease, and the current signal intensity will decrease slightly. At the same time, control and analysis component 1 compares the detected current signal curve with a preset standard curve (i.e., the standard curve obtained by plotting the rebar sleeve area as the X-axis and the current signal intensity as the Y-axis when the grout is completely filled), thereby accurately determining the density of the sleeve grout and the location of defects under this condition.

[0044] Example 3

[0045] The second detection component is described in detail below. The second detection component includes an ultrasonic transmitter 4 and an ultrasonic receiver 5. The ultrasonic transmitter 4 is located at the first end of the rebar sleeve and transmits ultrasonic signals into the rebar sleeve. The ultrasonic receiver 5 is located at the second end of the rebar sleeve and receives ultrasonic signals attenuated by the grouting material inside the rebar sleeve.

[0046] Both the ultrasonic transmitter 4 and the ultrasonic receiver 5 are electrically connected to the control and analysis component 1. The ultrasonic transmitter 4 generates ultrasonic signals of different wavelengths.

[0047] Ultrasonic signals propagate through grout and are attenuated due to the density of the grout. Grout with different densities attenuates ultrasonic waves to varying degrees.

[0048] When an ultrasonic wave is emitted from the transmitter, it propagates along the grout inside the rebar sleeve. During this process, the density of the grout directly affects the propagation speed and attenuation of the ultrasonic wave. Grout with higher density has a higher impedance to the ultrasonic signal, resulting in less attenuation; conversely, grout with lower density leads to greater attenuation. By measuring the intensity of the received ultrasonic signal, the control analysis component 1 can determine the attenuation during propagation, thereby inferring the density of the grout. Greater signal attenuation indicates potentially lower density; conversely, less signal attenuation indicates higher density.

[0049] Different frequency bands of ultrasonic signals have varying effects on the penetration and attenuation characteristics of grouting materials. High-frequency signals are suitable for thinner or looser materials, while low-frequency signals are suitable for denser materials. Using signals from multiple frequency bands helps to obtain a more comprehensive density assessment, especially in addressing material properties across different density ranges.

[0050] Upon receiving the ultrasonic signal, the following processing is performed: The control and detection component plots a curve based on the emitted and received ultrasonic signals. When the grouting material in the grouting sleeve is dense, the ultrasonic signal propagates as a transverse wave within the solid grouting material, resulting in very weak attenuation. The curve is plotted with time as the X-axis and ultrasonic signal intensity as the Y-axis, yielding a curve for the dense condition. When the grouting material in the grouting sleeve is not dense or contains cavities, the ultrasonic signal attenuates rapidly in the air. The curve is plotted with time as the X-axis and ultrasonic signal intensity as the Y-axis, yielding a curve for the non-dense condition. Simultaneously, the control and detection component compares the measured curve with a pre-set standard curve (i.e., the standard curve obtained when the grouting material is completely filled and the emitted ultrasonic signal is used). Through these steps, the density of the grouting material in the sleeve and the location of defects under these conditions are accurately determined.

[0051] Example 4

[0052] The control and analysis component 1 includes a control module, an analysis module, and a comparison module. The control module is electrically connected to the current signal transmitter 2 and the ultrasonic transmitter 4, and the analysis module is electrically connected to the control module, the current signal receiver, and the ultrasonic receiver 5.

[0053] The analysis module is used to receive the current signal strength and plot the current curve. The X-axis of the current curve represents different positions of the rebar sleeve, and the Y-axis of the current curve represents the current signal strength at different positions of the rebar sleeve.

[0054] The analysis module is also used to receive ultrasonic signals and plot ultrasonic curves. The X-axis of the ultrasonic curve represents time, and the Y-axis represents the ultrasonic signal intensity.

[0055] The comparison module has a built-in trained machine learning model, which analyzes current and ultrasonic curves. After training, the machine learning model can determine the density of the grout inside the rebar sleeve based on factors such as the shape and feature values ​​of the curves.

[0056] The current signal is measured at different locations on the rebar sleeve using a metal probe. A current curve is plotted based on the signal intensity. This curve provides information on the current intensity at different locations within the rebar sleeve, offering a preliminary indication of the grout density distribution.

[0057] Ultrasonic signals are emitted by a transmitter, propagate through the grout, and are received by a receiver. An ultrasonic curve is plotted based on the received signal intensity. This curve provides information on signal intensity changes over time, allowing analysis of variations in the grout's density.

[0058] The current curve and ultrasonic curve are used as inputs and processed and analyzed by a machine learning model in the comparison module. The machine learning model can be trained based on existing data to identify the characteristics of current and ultrasonic signals corresponding to different densities.

[0059] The comparison module provides a comprehensive assessment of the grout density inside the rebar sleeve based on the characteristics of the current and ultrasonic curves. This machine learning method can be optimized based on large amounts of data, providing more accurate density detection.

[0060] The machine learning model in this embodiment adopts a common big data model that can learn on its own. By continuously testing with two different testing methods, a large amount of different data is obtained. After the data is analyzed and calculated by the program, the results are compared with the previous data results. The program continuously improves the analysis process and model through a cycle of stimulation, training, feedback and correction of a large amount of data, and finally continuously improves its accuracy in judging the compactness of the sleeve grout and the location of defects.

[0061] Example 5

[0062] Finally, the device also includes a printer 6, which is electrically connected to the control and analysis component 1, and the printer 6 prints out a QR code 7 containing detection-related information. Both the control and analysis component 1 and the printer 6 are housed within a portable casing.

[0063] The device includes a newly added printer 6, whose main function is to print out a QR code 7 containing information related to the inspection. The QR code 7 contains information such as the compaction of the grouting sleeve, the location of defects, and the test time. The QR code 7 is printed by printer 6 and affixed to the corresponding location on the grouting sleeve. When scanned using a mobile phone or other electronic device, detailed information about the compaction test results of the grouting sleeve can be obtained.

[0064] The device and printer are integrated into a portable case, enhancing the device's mobility and convenience, making it suitable for scenarios requiring rapid on-site testing and report output.

[0065] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A test device for detecting the compactness of sleeve grouting material, characterized in that, include: The control analysis component (1), the first detection component and the second detection component are electrically connected to the control analysis component (1), and the first detection component and the second detection component are connected to the rebar sleeve, and the rebar sleeve is filled with grout. The first detection component is used to detect the current signal of the grout inside the rebar sleeve; the second detection component is used to detect the ultrasonic signal of the grout inside the rebar sleeve.

2. The sleeve grouting material density testing device according to claim 1, characterized in that, The first detection component includes: a current signal transmitting end (2), a current signal receiving end, and a metal probe group (3). The metal probe group (3) is fixedly installed inside the steel sleeve. The current signal transmitting end (2) is electrically connected to the control and analysis component (1) through a first wire (8). The current signal transmitting end (2) is electrically connected to the first end of the metal probe group (3). The second end of the metal probe group (3) is electrically connected to the current signal receiving end. The current signal receiving end is electrically connected to the control and analysis component (1) through a second wire (9).

3. The sleeve grouting material density testing device according to claim 2, characterized in that, The metal probe group (3) includes multiple metal probes, all of which are installed inside the steel sleeve. The lengths of the multiple metal probes are different. The first end of the multiple metal probes is electrically connected to the current signal transmitting end (2), and the second end of the metal probes is electrically connected to the current signal receiving end. The current signal strength corresponding to different metal probes is distinguished.

4. The sleeve grouting material density testing device according to claim 3, characterized in that, The central axis of the metal probe is parallel to the central axis of the steel bar sleeve, and the first end faces of the plurality of metal probes coincide.

5. The sleeve grouting material density testing device according to claim 3, characterized in that, The second detection component includes an ultrasonic transmitter (4) and an ultrasonic receiver (5). The ultrasonic transmitter (4) is disposed at the first end of the steel bar sleeve and transmits ultrasonic signals into the steel bar sleeve. The ultrasonic receiver (5) is disposed at the second end of the steel bar sleeve and receives ultrasonic signals attenuated by grouting material inside the steel bar sleeve. Both the ultrasonic transmitter (4) and the ultrasonic receiver (5) are electrically connected to the control and analysis component (1).

6. The sleeve grouting material density testing device according to claim 5, characterized in that, The ultrasonic transmitter (4) generates ultrasonic signals of different frequency bands.

7. The sleeve grouting material density testing device according to claim 5, characterized in that, The control and analysis component (1) includes a control module and an analysis module. The control module is electrically connected to the current signal transmitter (2) and the ultrasonic transmitter (4). The analysis module is electrically connected to the control module, the current signal receiver and the ultrasonic receiver (5). The analysis module is used to receive the current signal intensity and plot the current curve. The X-axis of the current curve represents different positions of the rebar sleeve, and the Y-axis of the current curve represents the current signal intensity at different positions of the rebar sleeve. The analysis module is also used to receive the ultrasonic signal and plot the ultrasonic curve, where the X-axis of the ultrasonic curve represents time and the Y-axis represents the ultrasonic signal intensity.

8. The test device for detecting the density of grouting material in sleeves according to claim 7, characterized in that, The control analysis component (1) further includes a comparison module, which has a built-in trained machine learning model and analyzes the current curve and the ultrasonic curve by inputting them into the machine learning model.

9. The test device for detecting the compactness of sleeve grouting material according to claim 1, characterized in that, It also includes a printer (6), which is electrically connected to the control and analysis component (1), and the printer (6) prints out a QR code (7), which includes detection-related information.

10. The test device for detecting the compactness of sleeve grouting material according to claim 9, characterized in that, Both the control and analysis component (1) and the printer (6) are housed within a portable case.

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