Roadbed internal defect flaw detection device

Abstract

The utility model relates to the technical field of roadbed quality detection equipment, in particular to a roadbed internal defect flaw detection device which comprises a ground penetrating radar, the ground penetrating radar is installed on a moving assembly through a first lifting assembly, and the ground penetrating radar is electrically connected with a control assembly; the sound wave generating device is mounted on the moving assembly through a second lifting assembly; the vibration meter is installed on the moving assembly, the distance between the vibration meter and the ground is larger than the distance between the transmitting end of the sound wave generating device and the ground, and the sound wave generating device and the vibration meter are both electrically connected with the control assembly; when a frequency spectrum threshold value received by the ground penetrating radar exceeds a set value, the control assembly controls the sound wave generating device to act and receives a signal transmitted by the vibration meter. According to the utility model, the comprehensiveness and accuracy of roadbed defect detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of subgrade quality detection equipment, in particular to a detection device for detecting internal defects of subgrade by flaw detection. Background Technique

[0002] The subgrade is an important part of transportation infrastructure, and its stability is directly related to the safety and normal service life of the road. Through detection, defects such as settlement, landslide, and collapse existing in the subgrade can be found in time, avoiding traffic accidents and economic losses.

[0003] Subgrade defects cause cracks and unevenness on the road surface, affecting the smoothness and safety of vehicle driving. Detection can accurately locate the settlement area and analyze the causes and development degree of the defects. Ground Penetrating Radar (GPR), as an efficient and non-destructive underground detection technology, plays an important role in subgrade defect detection. Through the principle of high-frequency electromagnetic wave reflection, it can quickly identify structural anomalies, material defects, and potential hidden dangers inside the subgrade, providing a scientific basis for road safety maintenance. For example, the prior application with the publication number CN119510420A discloses a detection device for apparent diseases of tunnel subgrade, which mainly detects road defects through vehicle-mounted ground penetrating radar. However, when using ground penetrating radar for detection, electromagnetic interference will occur near high-voltage lines or communication base stations. The electromagnetic interference will introduce random high-frequency clutter unrelated to the background in the spectrum, resulting in waveform distortion and reducing the comprehensiveness and accuracy of subgrade defect detection.

[0004] Therefore, those skilled in the art are committed to developing a detection device for detecting internal defects of subgrade by flaw detection to improve the comprehensiveness and accuracy of subgrade defect detection. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a detection device for detecting internal defects of subgrade by flaw detection to improve the comprehensiveness and accuracy of subgrade defect detection.

[0006] The technical solution of the utility model to solve the above technical problem is as follows:

[0007] A detection device for detecting internal defects of subgrade by flaw detection, comprising

[0008] a ground penetrating radar, which is installed on a moving component through a first lifting component, and the ground penetrating radar is electrically connected to a control component;

[0009] a sound wave generating device, which is installed on the moving component through a second lifting component;

[0010] A vibration meter is installed on the moving component, and the distance between the vibration meter and the ground is greater than the distance between the transmitting end of the acoustic wave generating device and the ground. Both the acoustic wave generating device and the vibration meter are electrically connected to the control component;

[0011] When the spectrum threshold received by the ground penetrating radar exceeds the set value, the control component controls the acoustic wave generating device to act and receives the signal transmitted by the vibration meter.

[0012] The beneficial effects of adopting the above solution are as follows: Combining the ground penetrating radar with acoustic wave detection to form a multi-modal detection method. During normal use, the ground penetrating radar uses high-frequency electromagnetic wave reflection to identify voids, cracks, moisture content, etc. inside the roadbed. When the spectrum threshold received by the ground penetrating radar exceeds the set value, it indicates that the ground penetrating radar is affected by nearby electromagnetic interference (such as high-voltage lines, communication base stations). The control component triggers the acoustic wave generating device to act, and the vibration meter receives the signal, and detects voids, cracks, etc. inside the roadbed through the acoustic wave signal. This collaborative working mode effectively overcomes the defect of the single ground penetrating radar being affected by electromagnetic interference, improves the comprehensiveness and accuracy of detection, and can more reliably identify the internal defects of the roadbed;

[0013] Adopting an automated control detection method, the ground penetrating radar, the acoustic wave generating device, and the vibration meter are all electrically connected to the control component and are uniformly regulated by the control component. This not only improves the automation degree of the detection process, reduces manual intervention, and reduces detection errors caused by human factors, but also ensures the standardization and consistency of detection operations, guarantees the accuracy and reliability of detection data, and provides a more solid data basis for the subsequent analysis and evaluation of roadbed defects.

[0014] On the basis of the above technical solution, the present utility model can also be improved as follows.

[0015] Further, the acoustic wave generating device is arranged on the second lifting plate. The second lifting component includes a lifting electric cylinder. The output ends of the two lifting electric cylinders are hinged to the second lifting plate. The lifting electric cylinder is installed on the moving component. A directional component is also installed between the second lifting plate and the moving component.

[0016] The beneficial effects of adopting the above further solution are as follows: The acoustic wave generating device is arranged on the second lifting plate. Cooperating with the lifting electric cylinder and the directional component, the height of the acoustic wave generating device can be precisely adjusted, enhancing the flexibility of detection, enabling it to adapt to different road conditions and detection requirements, and at the same time improving the accuracy and stability of detection, and ensuring the reliability of acoustic wave detection.

[0017] Further, the directional component includes a directional column installed on the moving component. A directional guide cylinder is sleeved outside the directional column, and the directional guide cylinder is also connected to the second lifting plate.

[0018] The beneficial effects of adopting the above further scheme are as follows: During the lifting process of the acoustic wave generating device, the orientation columns and the orientation guide cylinders ensure the linearity and stability of its movement, prevent detection errors caused by the device shaking during the detection process, ensure the accuracy of acoustic wave detection, and improve the credibility of the detection data.

[0019] Further, the vibration meter is installed on the lower side of the second lifting plate through a mounting bracket.

[0020] The beneficial effects of adopting the above further scheme are as follows: The vibration meter is fixed to the lower side of the second lifting plate through a mounting bracket, which is convenient for adjusting its distance from the ground, and at the same time maintains the stability and measurement accuracy of the vibration meter.

[0021] Further, the ground penetrating radar is arranged on the first lifting plate. The first lifting assembly includes a lead screw bearing installed on the first lifting plate, a rotating lead screw is arranged inside the lead screw bearing, and both ends of the rotating lead screw are rotatably connected to the moving assembly;

[0022] A first synchronous gear is connected to the end of the rotating lead screw. The first synchronous gear is connected to a second synchronous gear through a synchronous belt. The second synchronous gear is installed at the output end of the power assembly. The power assembly is installed on the side wall of the moving assembly and the power assembly is electrically connected to the control assembly.

[0023] The beneficial effects of adopting the above further scheme are as follows: The lifting system of the ground penetrating radar adopts a lead screw bearing, a rotating lead screw, synchronous gears and a power assembly. The power assembly is regulated by the control assembly to realize the stable lifting of the ground penetrating radar to detect different types of foundations.

[0024] Further, a linear bearing is installed on the first lifting plate, a guide column is sleeved inside the linear bearing, and the guide column is installed on the moving assembly.

[0025] The beneficial effects of adopting the above further scheme are as follows: The combination of the linear bearing and the guide column provides high-precision guidance for the first lifting plate, ensures the linearity and stability of the ground penetrating radar during lifting, avoids the position deviation of the ground penetrating radar during the detection process, improves the accuracy and repeatability of the detection results, and enhances the overall stability and reliability of the device.

[0026] Further, a strip groove is also provided on the first lifting plate. A bolt assembly is arranged on the strip groove. The bolt assembly is connected to an elastic column, and the elastic column abuts against the outer wall of the ground penetrating radar.

[0027] The beneficial effects of adopting the above further scheme are as follows: The strip groove, the bolt assembly and the elastic column form an elastic structure, which effectively buffers and absorbs the vibration and impact during the operation or movement of the ground penetrating radar, and prevents it from loosening or being damaged.

[0028] Furthermore, the moving component includes a moving vehicle frame, on which rollers and handrails are installed.

[0029] The beneficial effects of adopting the above further solution are as follows: The moving component consists of a moving vehicle frame, rollers and handrails. The rollers facilitate the rapid movement of the device on the roadbed surface, and the handrails facilitate the operator to control and push the device, reducing the labor intensity of the operator, making the detection process more convenient, and improving the practicability and operability of the device.

[0030] Furthermore, a cleaning component is also installed at the front end of the moving vehicle frame.

[0031] The beneficial effects of adopting the above further solution are as follows: The cleaning component at the front end of the moving vehicle frame can remove sundries and dust on the roadbed surface, improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic structural diagram of a subgrade internal defect detection device according to a specific embodiment of the present invention;

[0033] Figure 2 Schematic structural diagram of a sound wave generating device and a second lifting component according to a specific embodiment of the present invention;

[0034] Figure 3 Schematic structural diagram of a ground penetrating radar and a moving component according to a specific embodiment of the present invention;

[0035] Figure 4 Schematic structural diagram of a first lifting component according to a specific embodiment of the present invention;

[0036] In the drawings, the list of components represented by each reference numeral is as follows:

[0037] 1, ground penetrating radar; 2, first lifting component; 3, moving component; 4, control component; 5, sound wave generating device; 6, second lifting component; 7, vibration meter; 8, second lifting plate; 9, lifting electric cylinder; 10, directional column; 11, directional guide cylinder; 12, first lifting plate; 13, screw bearing; 14, rotating screw rod; 15, first synchronous gear; 16, synchronous belt; 17, second synchronous gear; 18, power component; 19, linear bearing; 20, guide column; 21, strip groove; 22, bolt component; 23, elastic column; 24, roller; 25, moving vehicle frame; 26, handrail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the system or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0040] In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, a subgrade internal defect detection device includes

[0043] a ground penetrating radar 1, the ground penetrating radar 1 is installed on a moving component 3 through a first lifting component 2, and the ground penetrating radar 1 is electrically connected to a control component 4;

[0044] a sound wave generating device 5, the sound wave generating device 5 is installed on the moving component 3 through a second lifting component 6;

[0045] a vibration measuring instrument 7, the vibration measuring instrument 7 is installed on the moving component 3, and the distance between the vibration measuring instrument 7 and the ground is greater than the distance between the transmitting end of the sound wave generating device 5 and the ground. Both the sound wave generating device 5 and the vibration measuring instrument 7 are electrically connected to the control component 4. The control component 4 is used to adjust the excitation sound wave frequencies of the sound wave generating device 5 and the vibration measuring instrument 7, and make the excitation sound wave frequencies of the sound wave generating device 5 and the vibration measuring instrument 7 keep synchronous, which is beneficial for the vibration measuring instrument 7 to receive the reflected echo and transmit it to the control component 4;

[0046] When the spectrum threshold received by the ground penetrating radar 1 exceeds the set value, the control component 4 controls the sound wave generating device 5 to act and receives the signal transmitted by the vibration measuring instrument 7.

[0047] In the present utility model, the ground penetrating radar 1 is combined with the acoustic wave detection to form a multi-modal detection method. In normal use, the ground penetrating radar 1 is used to identify the cavities, cracks and moisture content inside the roadbed through the reflection of high-frequency electromagnetic waves. When the spectrum threshold received by the ground penetrating radar 1 exceeds the set value, it means that the ground penetrating radar 1 is subject to nearby electromagnetic interference (such as high-voltage lines, communication base stations), and the control component 4 triggers the acoustic wave generating device 5 to operate, and the vibration meter 7 receives the signal, and detects the cavities, cracks, etc. inside the roadbed through the acoustic wave signal. This collaborative working mode effectively overcomes the defect of electromagnetic interference of the single ground penetrating radar 1, improves the comprehensiveness and accuracy of the detection, and can more reliably identify the internal defects of the roadbed.

[0048] like Figure 1 , Figure 2 As shown, in some embodiments, the sound wave generating device 5 is disposed on the second lifting plate 8. Specifically, the sound wave generating device 5 is connected to the second lifting plate 8 by bolts. In order to reduce the vibration of the sound wave generating device 5 during the movement, a shock-absorbing pad is also installed between the sound wave generating device 5 and the second lifting plate 8. The frequency range of the sound wave generating device 5 is 50Hz to 6250Hz.

[0049] The second lifting assembly 6 includes a lifting electric cylinder 9, which is electrically connected to the control assembly 4. The output ends of the two lifting electric cylinders 9 are hinged to the second lifting plate 8. In a specific embodiment, the two lifting electric cylinders 9 are respectively located at the diagonals of the second lifting plate 8. The lifting electric cylinders 9 are installed on the moving assembly 3 to ensure the stability of the entire sound wave generating device 5 during the movement. In order to ensure that the sound wave generating device 5 always maintains the correct direction during the lifting process, an orientation assembly is also installed between the second lifting plate 8 and the moving assembly 3. Specifically, the orientation assembly includes an orientation column 10 installed on the moving assembly 3. The orientation column 10 is provided with a directional guide cylinder 11 on the outer sleeve. The directional guide cylinder 11 is also connected to the second lifting plate 8, which effectively limits the lateral shaking of the second lifting plate 8 during the lifting process, ensuring the directional stability of the sound wave generating device 5.

[0050] The vibrometer 7 is installed on the lower side of the second lifting plate 8 through a mounting bracket, so that the vibrometer 7 can be closer to the ground. Specifically, the vibrometer 7 is a laser vibrometer, and the measurement frequency range of the vibrometer 7 is 0.05 Hz to 25 KHz.

[0051] like Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, the ground penetrating radar 1 is disposed on the first lifting plate 12. The first lifting assembly 2 includes a lead screw bearing 13 mounted on the first lifting plate 12. A rotating lead screw 14 is disposed within the lead screw bearing 13. Both ends of the rotating lead screw 14 are rotatably connected to the moving assembly 3. A first synchronous gear 15 is connected to one end of the rotating lead screw 14. The first synchronous gear 15 is connected to a second synchronous gear 17 through a synchronous belt 16. The second synchronous gear 17 is mounted on the output end of the power assembly 18. The power assembly 18 is mounted on the side wall of the moving assembly 3 and is electrically connected to the control assembly 4. The power assembly 18 may employ a servo motor. The control assembly 4 controls the servo motor to rotate, sequentially driving the second synchronous gear 17, the synchronous belt 16, the first synchronous gear 15, and the rotating lead screw 14 to rotate, thereby causing the first lifting plate 12 to move along the axial direction of the rotating lead screw 14.

[0052] In one embodiment, a linear bearing 19 is mounted on the first lifting plate 12. A guide post 20 is sleeved within the linear bearing 19. The guide post 20 is mounted on the moving assembly 3. A strip-shaped groove 21 is further provided on the first lifting plate 12. A bolt assembly 22 is disposed on the strip-shaped groove 21. The bolt assembly 22 is connected to an elastic column 23. The elastic column 23 abuts against the outer wall of the ground penetrating radar 1. The bolt assembly 22 may employ two bolts respectively located on the upper and lower sides of the first lifting plate 12, and the two bolts are connected by a connecting lead screw. The connecting lead screw is disposed within the strip-shaped groove 21. The bolt located on the upper side of the first lifting plate 12 is further connected to the elastic column 23 through a connecting column. By adjusting the position of the bolt assembly 22 on the strip-shaped groove 21 to adapt to different types of ground penetrating radars 1, and the elastic column 23 effectively buffers and absorbs the vibration and lateral impact during the operation or movement of the ground penetrating radar 1.

[0053] The control assembly 4 includes a control module. A spectrum monitoring module and an excitation sound wave frequency adjustment module are integrated on the control module. The excitation sound wave frequency adjustment module is used to adjust the excitation sound wave frequencies of the sound wave generating device 5 and the vibration meter 7. The spectrum monitoring module acquires the echo signal of the vibration meter 7, converts the time-domain signal into a frequency-domain signal through Fourier transform, and analyzes the spectrum distribution of the high-frequency clutter. The high-frequency clutter is manifested as a short-time energy burst in the frequency domain corresponding to a random pulse in the time domain, forming a difference from the continuous spectrum of the target signal. When the high-frequency clutter exceeds the threshold, the spectrum monitoring module sends an abnormal signal to the control module. The control module controls the sound wave generating device 5 to start according to the abnormal signal, and receives the sound wave signal transmitted by the vibration meter 7, and analyzes the holes, cracks, etc. inside the foundation through the sound wave signal.

[0054] The moving assembly 3 includes a moving vehicle frame 25. Wheels 24 and a handrail 26 are mounted on the moving vehicle frame 25. The wheels 24 enable the entire device to move easily on the roadbed surface, greatly improving the efficiency and convenience of the detection work. The design of the handrail 26 facilitates the operator to control and push the device, ensuring the smooth progress of the detection process.

[0055] A cleaning component is also installed at the front end of the moving frame 25. During the forward movement of the device, the cleaning component can effectively clean the debris on the roadbed surface, providing a clean and flat detection environment for the ground-penetrating radar 1 and the acoustic wave generating device 5, thereby ensuring the accuracy and reliability of the detection signal, avoiding misjudgment caused by surface debris interference, and improving the working performance of the entire detection device and the credibility of the detection result.

[0056] In other embodiments, a positioning device is also installed on the moving frame 25, and the positioning device is electrically connected to the control component 4. The positioning device can adopt a high-precision global positioning system (GPS) module or a Beidou positioning module, which can obtain the accurate position information of the detection device during the roadbed detection in real time.

[0057] When the detection device moves to the position of a preset mark (marking the position of high-voltage lines and base stations), the positioning device will immediately send the detected position signal to the control component 4. After receiving the position signal, the built-in control program of the control component 4 will automatically start the acoustic wave generating device 5 and the vibration meter 7 to carry out the detection operation in cooperation, improving the automation degree and efficiency of the detection, ensuring that acoustic wave detection can be carried out in a timely and accurate manner when reaching the key detection points, further enhancing the comprehensiveness and accuracy of the internal defect detection of the roadbed, and providing more reliable data support for the subsequent precise positioning and evaluation of the roadbed defects.

[0058] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flaw detection device for internal defects of a roadbed, characterized in that: including a ground penetrating radar (1), which is installed on a moving component (3) through a first lifting component (2), and the ground penetrating radar (1) is electrically connected to a control component (4); a sound wave generating device (5), which is installed on the moving component (3) through a second lifting component (6); a vibration meter (7), which is installed on the moving component (3), and the distance between the vibration meter (7) and the ground is greater than the distance between the transmitting end of the sound wave generating device (5) and the ground. Both the sound wave generating device (5) and the vibration meter (7) are electrically connected to the control component (4); when the spectrum threshold received by the ground penetrating radar (1) exceeds a set value, the control component (4) controls the sound wave generating device (5) to act and receives the signal transmitted by the vibration meter (7).

2. The subgrade internal defect flaw detection device according to claim 1, characterized in that: The sound wave generating device (5) is arranged on a second lifting plate (8). The second lifting component (6) includes a lifting electric cylinder (9). The output ends of two lifting electric cylinders (9) are hinged to the second lifting plate (8). The lifting electric cylinder (9) is installed on the moving component (3). A guiding component is also installed between the second lifting plate (8) and the moving component (3).

3. The roadbed internal defect detection device according to claim 2, characterized in that: The guiding component includes a guiding column (10) installed on the moving component (3). A guiding cylinder (11) is sleeved outside the guiding column (10). The guiding cylinder (11) is also connected to the second lifting plate (8).

4. The roadbed internal defect detection device according to claim 2, characterized in that: The vibration meter (7) is installed on the lower side of the second lifting plate (8) through a mounting bracket.

5. The subgrade internal defect flaw detection device according to claim 1, characterized in that: The ground penetrating radar (1) is arranged on a first lifting plate (12). The first lifting component (2) includes a screw bearing (13) installed on the first lifting plate (12). A rotating screw rod (14) is arranged inside the screw bearing (13). Both ends of the rotating screw rod (14) are rotatably connected to the moving component (3); One end of the rotating screw rod (14) is connected to a first synchronous gear (15). The first synchronous gear (15) is connected to a second synchronous gear (17) through a synchronous belt (16). The second synchronous gear (17) is installed at the output end of a power component (18). The power component (18) is installed on the side wall of the moving component (3) and the power component (18) is electrically connected to the control component (4).

6. The subgrade internal defect detection device according to claim 5, characterized in that: A linear bearing (19) is installed on the first lifting plate (12). A guiding column (20) is sleeved inside the linear bearing (19). The guiding column (20) is installed on the moving component (3).

7. The subgrade internal defect flaw detection device according to claim 5, characterized in that: A strip-shaped groove (21) is also arranged on the first lifting plate (12). A bolt assembly (22) is arranged on the strip-shaped groove (21). The bolt assembly (22) is connected to an elastic column (23). The elastic column (23) abuts against the outer wall of the ground penetrating radar (1).

8. The subgrade internal defect detection device according to claim 1, characterized in that: The moving component (3) includes a moving vehicle frame (25). Wheels (24) and a handrail (26) are installed on the moving vehicle frame (25).

9. The roadbed internal defect detection device according to claim 8, characterized in that: A cleaning component is also installed at the front end of the moving vehicle frame (25).

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