Intelligent crack detection device for tunnel construction

Abstract

The utility model discloses an intelligent crack detection device for tunnel construction, which comprises a host, a microscopic probe, a primary breather pipe and a secondary breather pipe, a vacuum pump is arranged in the main machine; an air suction pipe and an air pumping pipe are arranged in the microscopic probe; wherein the air inlet end of the vacuum pump is connected with the air suction pipe through a second-stage ventilation pipe, and a manifold is arranged at the air outlet end of the vacuum pump and connected with the air pumping pipe through a first-stage ventilation pipe; the microscopic probe is also provided with an air suction port and an air pumping port, one end of the air suction pipe is communicated with the secondary breather pipe, and the other end of the air suction pipe is communicated with the air suction port; one end of the air pumping pipe communicates with the first-stage ventilation pipe, and the other end of the air pumping pipe communicates with the air pumping opening. The utility model aims to solve the problems that the existing crack detection device is difficult to operate and cannot clean the accumulated dust in the crack.

Description

Technical Field

[0001] The utility model relates to the technical field of construction detection, in particular to an intelligent crack detection device for tunnel construction. Background Art

[0002] During tunnel construction, the presence of cracks can indicate potential structural weaknesses, potentially impacting tunnel stability and safety. Cracks can form due to geological conditions, construction methods, material aging, or other external factors, such as natural events like earthquakes. Promptly detecting and assessing these cracks is crucial to preventing tunnel collapse, ensuring the safety of construction workers, and avoiding increased repair costs later in the process.

[0003] Traditional crack detectors are not designed to address the confined spaces, humidity, dust, and potential chemical corrosion found in tunnels. For example, they are too large to be used in the confined and dynamic environments of tunnel construction. Furthermore, they can be heavy, difficult to maneuver, and inconvenient for a single person to hold. During the inspection process, dust and gravel can easily find their way into cracks due to construction. Failure to clean the dust from the cracks prevents effective crack imaging, leading to errors in crack detection results. Utility Model Content

[0004] The purpose of the utility model is to solve or alleviate the problems of difficult operation and inability to clean dust accumulated in cracks in existing tunnel construction crack detection devices, and to provide an intelligent crack detection device for tunnel construction.

[0005] The utility model is achieved through the following technical solutions:

[0006] An intelligent crack detection device for tunnel construction includes a host computer and a microprobe, which can transmit detection data to the host computer, and also includes a primary ventilation pipe and a secondary ventilation pipe; a vacuum pump is provided in the host computer, and an intake pipe and a pump air pipe are provided in the microprobe; wherein, the air inlet end of the vacuum pump is connected to the intake pipe through the secondary ventilation pipe, and the air outlet end of the vacuum pump is provided with a manifold, which is connected to the pump air pipe through the primary ventilation pipe; an intake port and a pump air port are also provided on the microprobe, one end of the intake pipe is connected to the secondary ventilation pipe, and the other end of the intake pipe is connected to the intake port; one end of the pump air pipe is connected to the primary ventilation pipe, and the other end of the pump air pipe is connected to the pump air port; when the vacuum pump is started, negative pressure will be formed at the intake port position, causing the microprobe to be adsorbed on the tunnel wall. At the same time, the pump air port blows air outwards to clear sand and gravel in the gap and clean the microprobe lens.

[0007] This solution incorporates an air intake and pump air pipe within the microprobe, connected to the vacuum pump within the main unit. When the vacuum pump is activated, negative pressure is generated at the air intake port, firmly adhering the microprobe to the tunnel wall and providing a stable and reliable detection platform. The pump air port also allows the device to blow air into the cracks, effectively removing grit and dust from the gaps and cleaning the microprobe lens to ensure the clarity of the crack image. This not only improves the accuracy and efficiency of crack detection, but also reduces image blur or positional deviation caused by improper operation, thereby enhancing the accuracy and repeatability of detection data and providing strong technical support for tunnel construction safety and structural integrity assessment.

[0008] Preferably, a first-stage impeller is provided in the suction pipe, and a second-stage impeller is provided in the pump pipe; an impeller shaft is provided between the first-stage impeller and the second-stage impeller, and the impeller shaft is movable through the pipe walls of the suction pipe and the pump pipe respectively, and the two ends of the impeller shaft are respectively connected to the first-stage impeller and the second-stage impeller; when the vacuum pump inhales air, the airflow drives the first-stage impeller to rotate, thereby increasing the gas outflow speed of the pump port.

[0009] Preferably, the microprobe is provided with two air inlets on the side closest to the tunnel wall, symmetrically located on either side of the centerline, with the airflow direction of the air intake pipe as the centerline. This allows for a more uniform negative pressure zone to be formed between the microprobe and the tunnel wall, reducing tilting or slipping of the microprobe due to uneven suction force.

[0010] Preferably, the pump air pipe is connected to an air branch channel, and a depth measuring unit is provided in the air branch channel.

[0011] Preferably, the depth measurement unit includes a depth probe with baffles disposed on its outer wall, symmetrically arranged about the probe's axial direction; a protrusion disposed on the inner wall of the air channel, with a spring connecting the protrusion and the baffle. When the depth probe moves, the baffle interacts with the protrusion, and the crack depth is measured by the change in relative position between the spring-connected protrusion and the baffle.

[0012] Preferably, the microprobe is cylindrical, with a camera module located at the center of the end of the microprobe closest to the tunnel wall. The air pump port is annular, with the center of the annular air pump port coinciding with the center of the end of the microprobe. This design allows for more uniform air cleaning, effectively cleaning the area around the microprobe.

[0013] Preferably, the blade pitch angle of the first-stage impeller is 30 to 45 degrees, and the blade pitch angle of the second-stage impeller is 45 to 60 degrees. This helps optimize gas flow and improve the kinetic energy conversion efficiency of the gas, thereby increasing the blowing speed and pressure of the gas.

[0014] Preferably, the primary ventilation pipe and the secondary ventilation pipe are both made of wear-resistant rubber.

[0015] Preferably, the air inlet is in an arc shape, and its center coincides with the center of the pump air inlet, thereby ensuring uniformity and symmetry of the gas flow and helping to form a stable negative pressure area.

[0016] Preferably, the host is provided with a display screen, and a data line is electrically connected between the display screen and the camera module.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. This utility model uses an innovative adsorption and cleaning mechanism to significantly improve the accuracy and efficiency of crack detection. A vacuum pump creates negative pressure at the microprobe's air inlet, allowing the microprobe to firmly adhere to the tunnel wall. Simultaneously, the pump blows air outward, effectively removing sand and gravel from the cracks and cleaning the microprobe lens. This ensures the stability of the microprobe during detection and image clarity, significantly reduces the risk of misjudgment due to dust interference, and provides more accurate crack data for tunnel construction.

[0019] 2. The utility model integrates a depth measurement unit, which can measure the depth of the crack through the air channel and depth probe, providing additional information for assessing the severity of the crack and the structural integrity. The cylindrical design of the microprobe and the setting of the annular pump air port further optimize the gas flow and cleaning effect, ensuring the comprehensiveness and efficiency of crack detection. At the same time, the device's wear-resistant rubber material ventilation tube and arc-shaped air intake design enhance the durability and reliability of the device in harsh environments. The display screen on the host provides the operator with real-time image and data feedback, simplifying the operation process and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention.

[0021] In the attached figure:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a side sectional view of the main unit of the present utility model;

[0024] Figure 3 This is a side sectional view of the microprobe of the present invention, intended to illustrate the connection between the air inlet, the air intake pipe, and the secondary ventilation pipe;

[0025] Figure 4This is another side cross-sectional view of the microprobe of the present invention, intended to illustrate the connection relationship between the pump air port, the pump air pipe, and the primary vent pipe;

[0026] Figure 5 This is another side sectional view of the microprobe of the present invention, which is intended to show the connection between the air channel and the pump air pipe and the installation position of the depth measurement unit;

[0027] Figure 6 for Figure 4 A magnified view of point A;

[0028] Figure 7 This is a structural diagram of the microscopic probe of the utility model adsorbing one side of the tunnel wall.

[0029] The reference numerals represent:

[0030] 1. Microscope probe, 12. Pump air port, 13. Intake port, 14. Intake pipe, 15. Pump air pipe, 16. Camera module, 2. Ventilation pipe, 21. First-stage ventilation pipe, 22. Second-stage ventilation pipe, 3. Main unit, 31. Display screen, 32. Vacuum pump, 41. First-stage impeller, 42. Impeller shaft, 43. Second-stage impeller, 5. Air channel, 51. Depth probe. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without the need for creative work are within the scope of protection of the present invention. The schematic implementation methods of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual research and development and use stage.

[0032] Unless otherwise defined, technical or scientific terms used in this utility model should have the ordinary meaning understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are simply used to distinguish different components. The words "include" or "comprising" and similar words mean that the elements or objects listed before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0033] During tunnel construction, crack detection of tunnel walls is essential. Conventional crack detectors require operators to hold a handheld probe during detection, which not only reduces detection stability but also increases operational inconvenience and safety risks. Furthermore, these detectors often lack effective cleaning mechanisms, making it difficult to remove dust and impurities from cracks, affecting the accuracy of detection data. Furthermore, due to the lack of an integrated depth measurement unit, these detectors are limited in their ability to assess crack depth and structural integrity. Finally, these detectors are generally large and complex to operate, or require a stable support structure, making them difficult to operate in narrow tunnels.

[0034] Example 1:

[0035] Please refer to the attached Figure 1 -Attached Figure 4 An intelligent crack detection device for tunnel construction includes a main unit 3 and a microprobe 1. The microprobe 1 can transmit detection data to the main unit 3, and also includes a primary vent pipe 21 and a secondary vent pipe 22. The main unit 3 is provided with a vacuum pump 32, and the microprobe 1 is provided with an air intake pipe 14 and a pump air pipe 15. The air inlet end of the vacuum pump 32 is connected to the air intake pipe 14 through the secondary vent pipe 22, and the air outlet end of the vacuum pump 32 is provided with a manifold, which is connected to the pump air pipe 15 through the primary vent pipe 21. The microprobe 1 is also provided with an air intake port 13 and an air pump port 12. One end of the air intake pipe 14 is connected to the secondary ventilation pipe 22, and the other end of the air intake pipe 14 is connected to the air intake port 13; one end of the air pump pipe 15 is connected to the primary ventilation pipe 21, and the other end of the air pump pipe 15 is connected to the air pump port 12; when the vacuum pump 32 is started, a negative pressure will be formed at the position of the air intake port 13, so that the microprobe 1 is adsorbed on the tunnel wall. At the same time, the air pump port 12 blows air outward to clear the sand and gravel in the gap and clean the lens of the microprobe 1.

[0036] During tunnel construction, this device generates negative pressure through the vacuum pump 32 in the host 3, so that the microprobe 1 is firmly adsorbed on the tunnel wall through the suction pipe 14 and the suction port 13. At the same time, the outlet end of the vacuum pump 32 drives the pump air pipe 15 through the manifold and the first-level ventilation pipe 21, so that the pump air port 12 blows gas into the crack, effectively clearing the gravel and dust in the crack, keeping the lens of the microprobe 1 clean, and ensuring the clarity of the crack image. The camera module 16 on the microprobe 1 then captures the crack image and transmits the data to the display screen 31 of the host 3 for construction personnel to analyze the crack situation in real time. The above scheme not only improves the efficiency and accuracy of crack detection, but also ensures that high-quality detection results can be obtained even in harsh tunnel construction environments.

[0037] This device offers significant advantages over larger detectors during tunnel construction. Its compact design and portability allow operators to easily carry it and quickly deploy it anywhere in the tunnel, minimizing disruption to construction progress and improving work efficiency. Its lightweight design also reduces the need for operators to work at height or in confined spaces, significantly improving safety.

[0038] It should be noted that the adsorption fixation method simplifies the operation process. Without the need for additional supports or fixing devices, the operator can quickly place the microprobe 1 at the location required for inspection, improving inspection efficiency. The adsorption fixation method also allows the microprobe 1 to be quickly removed from the tunnel wall, facilitating maintenance and cleaning, and extending the service life of the equipment.

[0039] As attached Figure 3 , Attachment Figure 4 , Attachment Figure 6 As shown, as a further preference of this embodiment, a first-stage impeller 41 is provided in the intake pipe 14, and a second-stage impeller 43 is provided in the pump air pipe 15; an impeller shaft 42 is provided between the first-stage impeller 41 and the second-stage impeller 43, and the impeller shaft 42 is movable through the pipe walls of the intake pipe 14 and the pump air pipe 15 respectively, and the two ends of the impeller shaft 42 are respectively connected to the first-stage impeller 41 and the second-stage impeller 43; when the vacuum pump 32 inhales air, the airflow drives the first-stage impeller 41 to drive the second-stage impeller 43 to rotate, thereby increasing the gas outflow speed of the pump air port 12.

[0040] The first-stage impeller 41 and the second-stage impeller 43 are connected by a common shaft, so the rotational kinetic energy of the first-stage impeller 41 is directly transferred to the second-stage impeller 43. The second-stage impeller 43 uses this transferred kinetic energy to further compress the gas. The appropriate number of blades is selected based on the design flow and pressure requirements. Generally speaking, the number of blades in a turbine is fewer than that in a compressor to reduce resistance. Typically, turbine blades are backward-curved, while compressor blades are forward-curved.

[0041] It should be noted that when the gas is blown out of the pump port 12 at high speed, it possesses high kinetic energy. When this high-speed airflow strikes the gravel and dust particles in the crack, it transfers kinetic energy to these particles, giving them sufficient momentum to be dislodged or blown away from the crack surface. This continuous airflow continuously cleans the crack and prevents particles from redepositing. By designing the position and direction of the pump port 12, the direction of the airflow can be controlled, allowing it to more effectively target specific areas within the crack.

[0042] As attached Figure 7 As shown, as a further preference of this embodiment, two air intake ports 13 are provided on the side of the microprobe 1 close to the tunnel wall, with the air flow direction of the air intake pipe 14 as the center line, and the two air intake ports 13 are symmetrically provided on both sides of the center line.

[0043] It should be noted that by setting two symmetrical air suction ports 13 on the same side of the microprobe 1, a negative pressure area can be formed more evenly between the microprobe 1 and the tunnel wall, reducing the tilting or sliding of the microprobe 1 caused by uneven adsorption force, and ensuring that the microprobe 1 is stably adsorbed on the tunnel wall.

[0044] It should be noted that in order to achieve a better adsorption effect, an adsorption pad can be set at the position of the air intake 13. The adsorption pad uses a softer and elastic material to better adapt to the unevenness of the tunnel wall; a multi-point adsorption system is introduced to evenly distribute the pressure through multiple adsorption points to improve the overall adsorption stability; an auxiliary adsorption device, such as a magnet or a small suction cup, is added to the side or edge of the microprobe 1 to provide an additional fixing point.

[0045] As attached Figure 5 As shown, this embodiment has a better solution. The pump air pipe 15 is connected to a branch air channel 5, and a depth measuring unit is provided in the branch air channel 5. The depth measuring unit includes a depth probe 51. The outer wall of the depth probe 51 is provided with a baffle, and the baffle is symmetrically arranged in the axial direction of the probe. A protrusion is provided on the inner wall of the branch air channel 5, and a spring is provided between the protrusion and the baffle to connect each other.

[0046] It should be noted that when the depth probe 51 moves, the baffle interacts with the bump, and the crack depth is measured by the change in relative position between the bump and baffle, which are connected by a spring. This design achieves crack depth measurement through a mechanical method, with the advantages of simple structure and low cost. Furthermore, the use of a spring ensures the stability and repeatability of the measurement process.

[0047] Crack detection process:

[0048] S1. Device Preparation: First, the operator places the microprobe 1 on the tunnel wall at the crack location to be inspected. Microprobe 1 is firmly attached to the tunnel wall via an internal adsorption mechanism (e.g., vacuum pump 32), ensuring stability during the inspection process.

[0049] S2. Start the test: The operator activates the camera module 16 in the microprobe 1 to begin imaging the crack. Simultaneously, the pump port 12 of the microprobe 1 begins blowing air outward to remove dust and impurities in the crack and ensure the clarity of the crack image.

[0050] S3. Crack Imaging: The camera module 16 of the microprobe 1 continuously photographs the crack to obtain high-resolution images of the crack. These images are transmitted via a data cable to the display screen 31 on the host computer 3 for real-time viewing by the operator.

[0051] S4. Depth Measurement: The depth probe 51 moves according to the depth of the crack and determines the crack depth using a displacement sensor or non-contact measurement technology (such as laser or ultrasound). The depth measurement result is also transmitted to the display 31 of the host 3.

[0052] S5. Data processing and analysis: Operators or automated analysis software process and analyze the acquired crack images and depth data to assess the crack width, depth, shape, and possible development trends.

[0053] S6. Recording and Reporting of Results: The test results are recorded and a report is generated for further structural assessment and decision making. If necessary, the operator can mark the cracks and take appropriate repair measures as needed.

[0054] S7. Equipment Removal: After completing the crack detection, the operator turns off the suction mechanism of the microprobe 1, and the microprobe 1 is detached from the tunnel wall. If necessary, the microprobe 1 can be moved to the next detection location and the above detection process can be repeated.

[0055] Example 2:

[0056] As attached Figure 1 With attached Figure 7 As shown, as a further optimization of the above embodiment, the microprobe 1 is cylindrical, and a camera module 16 is provided at the center of the end of the microprobe 1 close to the tunnel wall; the air pump port 12 is annular, and the center of the annular air pump port 12 coincides with the center of the end of the microprobe 1.

[0057] It should be noted that the design of the annular pump inlet 12 allows for more uniform air cleaning, effectively cleaning the area surrounding the microprobe 1 while avoiding interference with the camera module 16, thereby improving the accuracy and efficiency of crack detection. For example, the width or shape of the annular pump inlet 12 can be varied to accommodate cracks of varying sizes and shapes. Furthermore, the design of the microprobe 1 can be further improved to integrate more advanced detection technologies, such as multi-angle imaging or high-resolution imaging.

[0058] As a further optimization of this embodiment, the blade pitch angle of the first-stage impeller 41 is 30 to 45 degrees; the blade pitch angle of the second-stage impeller 43 is 45 to 60 degrees. This angle design helps optimize gas flow and improve the efficiency of gas kinetic energy conversion, thereby enhancing the gas blowing speed and pressure. By precisely controlling the impeller blade angle, the device can more effectively utilize the gas kinetic energy, increase the gas blowing speed and pressure, and thus improve the efficiency of crack cleaning and the adsorption force of the microprobe 1.

[0059] As a further optimization of this embodiment, the primary vent pipe 21 and the secondary vent pipe 22 are both made of wear-resistant rubber. The wear-resistant rubber material can withstand long-term wear and friction while maintaining good flexibility and sealing.

[0060] As a further optimization of this embodiment, the air inlet 13 is arc-shaped, and its center coincides with the center of the pump air inlet 12. This design ensures the uniformity and symmetry of the gas flow, helps to form a stable negative pressure area, and thus improves the adsorption effect of the microprobe 1.

[0061] As a further optimization of this embodiment, the main unit 3 is equipped with a display screen 31, which is electrically connected to the camera module 16 via a data cable. Crack images captured by the microprobe 1 can be transmitted to the display screen 31 in real time for analysis and judgment by the operator. The display screen 31 can be connected to the camera module 16 using wireless transmission technology to provide greater flexibility and mobility. Furthermore, the design of the display screen 31 can be further optimized, for example, by using a high-resolution screen or touchscreen technology to enhance user experience and ease of operation.

[0062] This device package includes an "Intelligent Crack Detection and Analysis System" for use in crack detection devices. By integrating advanced automatic image recognition and analysis technology, it can assess crack shape, width, and depth in real time, compare it with historical data, and automatically identify crack development trends and potential risks. It also has adaptive environmental adjustment capabilities, automatically optimizing detection parameters based on the tunnel's environmental conditions to ensure data accuracy and reliability. Furthermore, the system supports wireless data transmission, enabling remote monitoring and remote diagnosis by an expert team. It also features a built-in intelligent early warning system, promptly alerting construction workers and managers to take preventive measures. The system also uses machine learning algorithms for self-learning and optimization to improve detection efficiency and accuracy, and provides a user-friendly interactive interface for operator control and data interpretation. The device's modular design also ensures that its functionality can be expanded and upgraded to meet specific needs, providing a comprehensive, intelligent crack detection and analysis solution for tunnel construction.

[0063] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure. The following points need to be explained: The accompanying drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design. In the absence of conflict, the features of the same embodiment and different embodiments of the present invention can be combined with each other. The above is only an exemplary implementation of the present invention, and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the attached claims.

Claims

1. An intelligent crack detection device for tunnel construction, comprising a host (3) and a microprobe (1), wherein the microprobe (1) can transmit detection data to the host (3), and is characterized in that: It also includes a primary vent pipe (21) and a secondary vent pipe (22); The main unit (3) is provided with a vacuum pump (32), and the microprobe (1) is provided with an air suction pipe (14) and a pump air pipe (15); The air inlet of the vacuum pump (32) is connected to the air intake pipe (14) via the secondary vent pipe (22), and the air outlet of the vacuum pump (32) is provided with a manifold, which is connected to the pump air pipe (15) via the primary vent pipe (21); The microprobe (1) is further provided with an air intake port (13) and an air pump port (12); one end of the air intake pipe (14) is connected to the secondary vent pipe (22), and the other end of the air intake pipe (14) is connected to the air intake port (13); one end of the air pump pipe (15) is connected to the primary vent pipe (21), and the other end of the air pump pipe (15) is connected to the air pump port (12); When the vacuum pump (32) is started, negative pressure is formed at the air inlet (13), causing the microprobe (1) to be adsorbed on the tunnel wall. At the same time, the pump air inlet (12) blows air outward to clear the sand and gravel in the gap and clean the lens of the microprobe (1).

2. The intelligent crack detection device for tunnel construction according to claim 1, characterized in that: A first-stage impeller (41) is provided in the air intake pipe (14), and a second-stage impeller (43) is provided in the air pump pipe (15); An impeller shaft (42) is provided between the first-stage impeller (41) and the second-stage impeller (43). The impeller shaft (42) is movable and penetrates the walls of the suction pipe (14) and the pump air pipe (15), respectively. The two ends of the impeller shaft (42) are respectively connected to the first-stage impeller (41) and the second-stage impeller (43). When the vacuum pump (32) inhales air, the air flow drives the first-stage impeller (41) to drive the second-stage impeller (43) to rotate, thereby increasing the gas outflow speed of the pump air port (12).

3. The intelligent crack detection device for tunnel construction according to claim 1, characterized in that: Two air intake ports (13) are provided on one side of the microprobe (1) close to the tunnel wall, with the airflow direction of the air intake pipe (14) being the center line, and the two air intake ports (13) are symmetrically arranged on both sides of the center line.

4. The intelligent crack detection device for tunnel construction according to claim 3, characterized in that: The pump air pipe (15) is connected to an air distribution channel (5), and a depth measurement unit is provided in the air distribution channel (5).

5. The intelligent crack detection device for tunnel construction according to claim 4, characterized in that: The depth measurement unit comprises a depth probe (51), the outer wall of the depth probe (51) is provided with a baffle, and the baffle is symmetrically arranged in the axial direction of the probe; a convex block is provided on the inner wall of the air distribution channel (5), and a spring connecting the convex block and the baffle is provided between them.

6. The intelligent crack detection device for tunnel construction according to claim 2, characterized in that: The microprobe (1) is cylindrical, and a camera module (16) is provided at the center of the end of the microprobe (1) close to the tunnel wall; the air pump port (12) is annular, and the center of the annular air pump port (12) coincides with the center of the end of the microprobe (1).

7. The intelligent crack detection device for tunnel construction according to claim 2, characterized in that: The blade inclination angle of the first-stage impeller (41) is 30 to 45 degrees; the blade inclination angle of the second-stage impeller (43) is 45 to 60 degrees.

8. The intelligent crack detection device for tunnel construction according to claim 7, characterized in that: The primary ventilation pipe (21) and the secondary ventilation pipe (22) are both made of wear-resistant rubber.

9. The intelligent crack detection device for tunnel construction according to claim 1, characterized in that: The air inlet (13) is in an arc shape, and its center coincides with the center of the pump air inlet (12).

10. An intelligent crack detection device for tunnel construction according to any one of claims 1 to 9, characterized in that: The host (3) is provided with a display screen (31), and a data line is electrically connected between the display screen (31) and the camera module (16).

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