Railway bridge and tunnel concrete crack automatic detection device and method based on cloud computing

Abstract

The application belongs to the technical field of detection tools, and particularly relates to a railway bridge and tunnel concrete crack automatic detection device and method based on cloud computing, which comprises a handheld machine, a detector and an acoustic wave probe. The detector is detachably installed on the surface of the handheld machine. The outer wall of one side of the handheld machine is fixedly installed with a display screen for displaying a crack direction image. The acoustic wave probe is detachably assembled in the interior of the handheld machine. One side of the interior of the handheld machine is provided with a distance adjusting mechanism for adjusting the distance between the two acoustic wave probes. One side of the interior of the handheld machine and located at the distance adjusting mechanism is provided with a smearing mechanism for smearing a coupling agent on the end of the acoustic wave probe. One side of the smearing mechanism away from the distance adjusting mechanism is provided with an injection mechanism for injecting the coupling agent. The application can automatically change the distance between the probe and the crack and the smearing of the coupling agent, and only one person is needed for operation and the handheld machine is ensured to be attached to the concrete surface.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of detection tools, and particularly relates to a railway bridge and tunnel concrete crack automatic detection device and method based on cloud computing. BACKGROUND

[0002] The crack depth detection device is a non-destructive testing tool for measuring the crack depth of a concrete or other material surface. Such a device is usually based on the principle of acoustic wave diffraction and measures the crack depth by emitting and receiving ultrasonic waves. The crack depth detection device is widely used in the maintenance and inspection of bridges, tunnels, buildings and concrete pavements, and the like. The instrument can accurately measure the depth of cracks and help engineers assess the integrity and safety of structures.

[0003] Cloud computing is a mode of providing on-demand computing services over the Internet, including infrastructure, platform and software services at different levels. The core of cloud computing is to realize the centralization and sharing of computing resources, and to divide and execute huge data processing tasks on multiple servers through a network, thereby effectively improving computing efficiency and resource utilization.

[0004] Problems of the prior art:

[0005] In the existing work of detecting crack depth using ultrasonic waves, multiple people are generally required to complete the work. One person holds the ultrasonic probe, completes the fixing of the probe, adjusts the position of the probe and applies the coupling agent, and the other person operates the instrument to complete the depth detection. For the detection of complex bridge holes or tunnel cracks, the above operation is also used. This method requires multiple people to cooperate and is complicated to operate. There is no device in the existing equipment that can complete all the above work at the same time.

[0006] For a device that can realize single-person detection, how to ensure the normal detection process while controlling the two probes and changing their distance from the crack and automatically applying the coupling agent is a difficult problem to be overcome. SUMMARY

[0007] The purpose of the present application is to provide a railway bridge and tunnel concrete crack automatic detection device and method based on cloud computing, which can automatically change the distance between the probe and the crack and the application of the coupling agent, and only requires single-person operation and ensures that the handheld machine is attached to the concrete surface.

[0008] The technical solutions adopted by the present application are as follows:

[0009] The utility model provides a kind of railway bridge and tunnel concrete crack automatic detection device based on cloud computing, including hand-held machine, detector and acoustic wave probe, the detector is detachably installed on the surface of hand-held machine, the outer wall of one side of hand-held machine is fixedly installed with display screen for showing crack direction image, the acoustic wave probe is detachably assembled in the inside of hand-held machine, one side of the inside of hand-held machine is provided with pitch adjusting mechanism for adjusting the pitch of two acoustic wave probes, the side of pitch adjusting mechanism in the inside of hand-held machine is provided with smearing mechanism for smearing couplant to the end of acoustic wave probe, the side of smearing mechanism away from pitch adjusting mechanism is provided with injection mechanism for injecting couplant, the side of pitch adjusting mechanism in the inside of hand-held machine is detachably installed with battery;

[0010] The both ends of the surface of hand-held machine are fixedly installed with handle, and the inside of the end of handle is integrally provided with operating panel, the surface of operating panel is provided with operating button for performing detection work;

[0011] The operator controls the work of detector, pitch adjusting mechanism, smearing mechanism and injection mechanism by pressing operating button with thumb;

[0012] Pitch adjusting mechanism provides two measures to protect the movement of acoustic wave probe, so that acoustic wave probe is away from the surface of concrete before changing position;

[0013] Smearing mechanism includes herringbone, which is moved to the end of acoustic wave probe and the surface of concrete before changing position, to remove impurities on the surface and then smears couplant.

[0014] The operating button is electrically connected with detector by data line connection, the inside of handle is rotatably connected with trigger handle, the inner wall of handle is fixedly provided with pressure sensor, and the surface of trigger handle and the position close to pressure sensor are integrally provided with pressing block, the lower end of support block on the lower surface of hand-held machine close to display screen is in the same plane with soft pad on the other side of the lower surface of hand-held machine;

[0015] The end of trigger handle away from switching point is connected with traction rod, both ends of the inside of hand-held machine are rotatably installed with lever one and lever two, the bottom end of traction rod extends to the inside of hand-held machine and is connected with one end of corresponding lever one, the other end of lever one is connected with one end of lever two.

[0016] The distance adjusting mechanism comprises a distance guide frame, inner walls at both ends of the handset are fixedly provided with guide columns, both ends of the distance guide frame are movably sleeved on surfaces of the guide columns, a surface of the guide column is sleeved with a spring one for resetting the distance guide frame, the other ends of two pry bars two are connected with both ends of the distance guide frame, a middle part of the distance guide frame is embeddedly installed with a camera, the camera is electrically connected with the display screen, both sides inside the distance guide frame are slidably assembled with elastic group rotating assemblies for installing the acoustic wave probe;

[0017] The elastic group rotating assembly comprises a sleeve shell, a cover shell two, an outer ring body and a sliding block, an outer wall of the acoustic wave probe is integrally provided with an epitaxial body, a bottom of the sleeve shell is integrally provided with a cover shell one, the cover shell two is detachably assembled below the cover shell one through screws, an inside of the cover shell one is movably assembled with a push plate for extruding the epitaxial body through arrayed springs two, the sleeve shell is sleeved on a surface of the acoustic wave probe, and the outer ring body is sleeved on an outer surface of the sleeve shell, both sides of an inner wall of the outer ring body are integrally provided with a coil spring shell one for rotationally connecting with the sleeve shell, other two sides of the inner wall of the outer ring body are integrally provided with a coil spring shell two for rotationally connecting with the sliding block, and the inside of the coil spring shell one and the coil spring shell two are provided with a coil spring, the sliding block is embeddedly and slidably assembled inside the distance guide frame.

[0018] An inside of the handset is rotationally assembled with a double thread screw rod, surfaces of two sections of the double thread screw rod are both screwed with a ring sleeve frame, an inside of the handset and located on one side of the double thread screw rod is symmetrically fixedly provided with a horizontal guide frame for guiding the ring sleeve frame to move, an inside of the handset and located on the other side of the double thread screw rod is fixedly provided with a distance measuring plate, one end of the ring sleeve frame is assembled with a displacement sensor for cooperating with the distance measuring plate and detecting a moving distance, the other end of the ring sleeve frame is provided with a vertical slot, a middle part of the double thread screw rod is fixedly sleeved with a gear two.

[0019] A middle part of an inside of one side of the handset is fixedly installed with a motor one, an inside of the handset and located on one side of the motor one is rotationally assembled with a transmission shaft, an output end of the motor one is drivingly connected with the transmission shaft through a helical gear set, an outer surface of the transmission shaft is sleeved with a worm tube, and an inside of the handset is rotationally assembled with a gear one meshing with the worm tube, the gear one is simultaneously meshed with the gear two, an inner wall of a bottom of the worm tube is arrayed fixedly provided with a pointed tooth, a bottom of the transmission shaft is slidably sleeved with a pointed tooth gear, and the pointed tooth gear is separably meshed with the pointed tooth, a middle part of an outer wall of the distance guide frame close to the motor one is fixedly connected with a plug-in frame, and the pointed tooth gear is rotationally assembled at a top end of the plug-in frame.

[0020] The application discloses a handheld machine for applying coupling agent, which comprises a long slot rod, a penetrating rod and a belt frame.

[0021] The inside of the fixed pipe is throughly rotationally assembled with an inner shaft, the top end of the inner shaft is fixedly installed with a gear three, the bottom end of the inner shaft is fixedly installed with a herringbone rod, the surface of one end of the herringbone rod is fixedly provided with a soft brush, the surface of the other end of the herringbone rod is arrayed with a nozzle, the bottom of the inner shaft is fixedly assembled with a liquid valve, the bottom of the liquid valve is connected with a liquid pipe one communicated with the nozzle, one side of the liquid valve is connected with a liquid pipe two extending to the bottom of the herringbone rod, the inside of the liquid valve is elastically and telescopically assembled with a valve core rod for controlling the on-off of the liquid pipe one and the liquid pipe two, and the top end of the valve core rod is integrally provided with an arc surface body.

[0022] Two belt frames are symmetrically fixedly installed at the two ends of the inside of the handheld machine, the inside of the belt frame is assembled with a wide sawtooth track engaged with the corresponding gear three, the inside of the belt frame is rotationally assembled with a driving roller for driving the operation of the wide sawtooth track, a double-shaft motor is fixedly installed above the inside of the handheld machine and located at the middle position between the two belt frames, and the two ends of the output shaft of the double-shaft motor are drivingly connected with the two driving rollers through a helical gear set.

[0023] The injection mechanism comprises a coupling agent liquid tank and a connecting bridge fixedly installed in the inside of the handheld machine, and the connecting bridge is located below the coupling agent liquid tank, the surface of the coupling agent liquid tank is integrally provided with a supplement pipe at the middle part, one side of the middle part of the coupling agent liquid tank is fixedly assembled with a motor two, the bottom of the coupling agent liquid tank is fixedly connected with guide rods at the two ends, the distal end of the guide rod is movably sleeved with a hook plate, the output end of the motor two is fixedly connected with a rotating arm, and the two ends of the rotating arm are connected with the two hook plates through connecting arms.

[0024] The both ends of the connecting bridge are fixedly provided with syringes, baffle plates are integrally arranged on the both sides of the middle part of the connecting bridge, a piston piece is telescopically assembled in the syringe, one end of the piston piece outside the syringe is fixedly connected with an end plate, the hook plate is arranged on the side of the end plate close to the syringe and is used for carrying the piston piece to move, springs four are connected between the end plate and the corresponding baffle plate, a suction pipe is connected to the end of the syringe away from the end plate and is connected with the end of the injection pipe at the same time, one-way valves are arranged in the interiors of the ends of the suction pipe and the injection pipe close to the syringe, and the other end of the suction pipe is connected with a coupling agent liquid tank.

[0025] A railway bridge and tunnel concrete crack detection method based on cloud computing, the specific steps are as follows:

[0026] S1: using a handset to control two acoustic probes, the depth of the concrete crack at the detection position is detected;

[0027] S2: the operator controls the operation button with the thumb to control the equidistance adjustment and the coupling agent application, wherein the trigger operation of each distance adjustment is to pinch the trigger handle;

[0028] S3: when the acoustic probe detects the crack depth early, the equidistance adjustment is immediately ended;

[0029] S4: the concrete crack depth information of the detection position is uploaded to the database of cloud computing;

[0030] S5: the detection position is replaced, and the steps S1 to S4 are repeated;

[0031] S6: the crack depth information of each point is integrated, analyzed and calculated in the cloud computing system, and the danger degree is judged.

[0032] The technical effects obtained by the application are:

[0033] (1) the application provides a device that can be operated by a single person and detects cracks, the movement of the acoustic probe and the application of the coupling agent can be controlled through the operation panel near the user's thumb, the entire detection process only needs the operator to attach the handset to the concrete surface and change the position in time, thereby reducing the complexity and tediousness of the traditional detection work.

[0034] (2) the elastic group assembly in the distance adjustment mechanism can make the acoustic probe suitable for detecting surfaces with different plane heights and different shapes, and is suitable for concrete crack detection work of complex structures such as bridge tunnels.

[0035] (3) The present application provides a distance adjusting mechanism capable of changing the distance between two acoustic wave probes, which can automatically change the distance between the acoustic wave probe and the crack without moving the handheld machine by the operator, in addition, before changing the position, the trigger handle needs to be tightly held, and the acoustic wave probe needs to be away from the concrete surface, and at the same time, the bevel gear needs to be deeply inserted into the worm pipe, so that the acoustic wave probe can be moved by the motor, which provides two protection measures for the movement of the acoustic wave probe, and ensures that the acoustic wave probe moves without friction with the concrete surface.

[0036] (4) The present application provides an injection mechanism for providing injection coupling agent power, which can realize multiple coupling agent injection processes when liquid pipe one and liquid pipe two are communicated.

[0037] (5) The detection method provided by the present application can end the position adjustment of the acoustic wave probe in time when the crack depth has been measured, which meets the normal process of existing crack detection, in addition, by uploading the detection data to the cloud computing system, not only the crack forming condition can be quickly analyzed, but also the risk degree of the crack can be analyzed by means of big data. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is the structure diagram of the detection device provided by the embodiment of the present application;

[0039] Figure 2 is the local enlarged structure diagram of A in Figure 1

[0040] Figure 3 is the bottom structure diagram of the handheld machine provided by the embodiment of the present application;

[0041] Figure 4 is the internal sectional view of the handheld machine provided by the embodiment of the present application;

[0042] Figure 5 is the structure disassembly diagram of the distance adjusting mechanism provided by the embodiment of the present application;

[0043] Figure 6 is the disassembly diagram of the acoustic wave probe mounting structure provided by the embodiment of the present application;

[0044] Figure 7 is the composition structure diagram of the double-threaded screw rod and the ring sleeve frame provided by the embodiment of the present application;

[0045] Figure 8 is the local enlarged structure diagram of B in Figure 7

[0046] Figure 9 is the structure disassembly diagram of the smearing mechanism provided by the embodiment of the present application;

[0047] ​​Figure 10 is a half long slot rod and single herringbone rod combination structure diagram provided by an embodiment of the present application;

[0048] Figure 11 is a fixed pipe and herringbone rod combination structure diagram provided by an embodiment of the present application;

[0049] Figure 12 is Figure 11 is a local enlarged structure diagram at C in the middle;

[0050] Figure 13 is a structure diagram of an injection mechanism provided by an embodiment of the present application;

[0051] Figure 14 is a schematic diagram of detecting position replacement provided by an embodiment of the present application

[0052] Figure 15 is a flowchart of detection provided by an embodiment of the present application.

[0053] In the drawings, the components represented by each reference numeral are listed as follows:

[0054] 1, handset; 101, handle; 102, operation panel; 103, operation button; 104, trigger handle; 105, pressure sensor; 106, pressing block; 107, traction rod; 108, soft pad; 109, supporting block; 110, pry bar one; 111, pry bar two; 112, pry bar three;

[0055] 2, detector;

[0056] 3, display screen;

[0057] 4, acoustic wave probe; 401, outer extension body;

[0058] 5, distance adjusting mechanism; 501, distance guide frame; 502, camera; 503, guide column; 504, spring one; 505, sleeve; 506, cover one; 507, cover two; 508, push plate; 509, spring two; 510, outer ring body; 511, spring winding shell one; 512, spring winding shell two; 513, sliding block; 514, horizontal guide frame; 515, double-threaded screw rod; 516, distance measuring plate; 517, ring sleeve frame; 518, displacement sensor; 519, motor one; 520, transmission shaft; 521, worm tube; 522, sharp cone gear; 523, sharp cone gear; 524, gear one; 525, gear two; 526, vertical slot; 527, plug-in frame;

[0059] 6, smearing mechanism; 601, long slot bar; 602, guide plate; 603, sliding plate; 604, extension rod; 605, guide shell; 606, rod; 607, fixed tube; 608, spring three; 609, inner shaft; 610, gear three; 611, herringbone rod; 612, soft brush; 613, nozzle; 614, liquid valve; 615, liquid pipe one; 616, liquid pipe two; 617, valve core rod; 618, cambered surface body; 619, ring frame; 620, trigger protrusion; 621, limiting resistance rod; 622, injection pipe; 623, belt frame; 624, wide sawtooth track; 625, driving roller; 626, double-shaft motor;

[0060] 7, injection mechanism; 701, coupling agent liquid tank; 702, supplement pipe; 703, motor two; 704, rotating arm; 705, guide rod; 706, hook plate; 707, connecting arm; 708, injector; 709, end plate; 710, baffle; 711, spring four; 712, suction pipe; 713, connecting bridge;

[0061] 8, battery. DETAILED DESCRIPTION

[0062] In order to make the objects and advantages of the present application clearer, the following will specifically describe the present application in conjunction with embodiments. It should be understood that the following description is only used to describe one or several specific embodiments of the present application, and does not strictly limit the protection scope of the present application.

[0063] As Figures 1-13 shown in the figure, a railway bridge and tunnel concrete crack automatic detection device based on cloud computing, including a handheld machine 1, a detector 2 and a sound wave probe 4, the detector 2 is detachably installed on the surface of the handheld machine 1, the outer wall of one side of the handheld machine 1 is fixedly installed with a display screen 3 for displaying crack direction image, the sound wave probe 4 is detachably assembled in the interior of the handheld machine 1, one side of the interior of the handheld machine 1 is provided with a pitch adjusting mechanism 5 for adjusting the pitch of the two sound wave probes 4, one side of the interior of the handheld machine 1 and located at the pitch adjusting mechanism 5 is provided with a smearing mechanism 6 for smearing coupling agent on the end of the sound wave probe 4, one side of the smearing mechanism 6 away from the pitch adjusting mechanism 5 is provided with an injection mechanism 7 for injecting coupling agent, the interior of the handheld machine 1 and away from the pitch adjusting mechanism 5 is detachably installed with a battery 8.

[0064] Example one:

[0065] Referring to the drawings Figures 1-3The handheld device 1 is provided with a handle 101 fixedly arranged at both ends of the surface of the handheld device 1, and an operating panel 102 is integrally arranged at the inner side of the end of the handle 101, the surface of the operating panel 102 is provided with an operation button 103 for performing detection work, the operation button 103 is electrically connected with the detector 2 through a data line, a trigger handle 104 is rotatably connected to the inner side of the handle 101, a pressure sensor 105 is fixedly arranged on the inner wall of the handle 101, a pressing block 106 is integrally arranged on the surface of the trigger handle 104 and close to the position of the pressure sensor 105, a supporting block 109 is arranged on the lower surface of the handheld device 1 and close to one side of the display screen 3, and a soft pad 108 is attached to the other side of the lower surface of the handheld device 1, and the bottom end of the supporting block 109 is in the same plane with the soft pad 108.

[0066] According to the above structure, there is a gap between the part of the lower surface of the handheld device 1 containing the supporting block 109 and the surface of the concrete, which is beneficial to the movement of the sound wave probe 4 and the spraying of the coupling agent, and the part of the lower surface of the handheld device 1 containing the soft pad 108 is attached to the surface of the concrete.

[0067] Referring to the accompanying drawings Figure 2 and Figure 5 The end of the trigger handle 104 away from the pivot point is connected with a traction rod 107, a lever one 110 and a lever two 111 are rotatably arranged at both ends of the inside of the handheld device 1, the bottom end of the traction rod 107 extends into the inside of the handheld device 1 and is connected with one end of the corresponding lever one 110, and the other end of the lever one 110 is connected with one end of the lever two 111.

[0068] According to the above structure, when using the detection device, the detector 2 and the two sound wave probes 4 are installed, the operator holds the two sound wave probes 4 and attaches them to the surface of the concrete, the operator's thumb can control the detector 2, the distance adjusting mechanism 5, the smearing mechanism 6 and the injection mechanism 7 to work through the operation button 103 on the operating panel 102, the distance adjusting mechanism 5 is used to continuously adjust the distance between the two sound wave probes 4 for completing the detection of the crack depth, and the detection principle is referred to Figure 14 Before adjusting the position each time, the operator needs to tightly hold the trigger handle 104, and the positioning work of the sound wave probe 4 can be performed when the pressing block 106 on the surface of the trigger handle 104 extrudes the pressure sensor 105, the above process provides a device that can be operated by a single person and performs crack detection, the movement of the sound wave probe 4 and the smearing of the coupling agent can be controlled through the operating panel 102 near the thumb of the user, and the whole detection process only needs the operator to attach the handheld device 1 to the surface of the concrete and timely change the position, which reduces the complexity and tediousness of the traditional detection work.

[0069] The working principle of the application is that when the detection device is used, the detector 2 and the two sound wave probes 4 are installed, the operator holds the two sound wave probes 4 and sticks them to the surface of the concrete, the operator's thumb can control the detector 2, the distance adjusting mechanism 5, the smearing mechanism 6 and the injection mechanism 7 to work through the operation button 103 on the operation panel 102, wherein the distance adjusting mechanism 5 is used to continuously adjust the distance of the two sound wave probes 4, and before adjusting the position each time, the operator needs to hold the trigger handle 104 tightly, and when the pressing block 106 on the surface of the trigger handle 104 extrudes the pressure sensor 105, the positioning work of the sound wave probe 4 can be carried out.

[0070] The detector 2 is internally provided with an internet data interaction system, which is used for data interaction between the detection data and the cloud computing system, and the data processing task is completed by means of a plurality of servers provided by the system, and the data of the task can be analyzed in relation to the detection data of other detection tasks provided by a third party in a public cloud, and a cloud computing solution can be flexibly provided.

[0071] Embodiment two:

[0072] Referring to the accompanying drawings Figure 5 The distance adjusting mechanism 5 comprises a distance guide frame 501, the inner walls at both ends of the hand-held machine 1 are fixedly provided with guide columns 503, the two ends of the distance guide frame 501 are movably sleeved on the surfaces of the guide columns 503, the surface of the guide column 503 is sleeved with a spring I 504 for resetting the distance guide frame 501, the other ends of the two pry levers II 111 are connected with the two ends of the distance guide frame 501, the middle part of the distance guide frame 501 is embeddedly provided with a camera 502, and the camera 502 is electrically connected with the display screen 3, and the two sides in the distance guide frame 501 are slidably assembled with elastic group rotating assemblies for installing the sound wave probes 4;

[0073] According to the above structure, the camera 502 is used for shooting the direction of the crack, and the display screen 3 is used for displaying, so that the staff can timely adjust the angle of the hand-held machine 1.

[0074] Referring to the accompanying drawings Figure 6, the elastic group rotating assembly includes a sleeve 505, a cover 507, an outer ring 510 and a slider 513, the outer wall of the acoustic wave probe 4 is integrally provided with an epitaxial body 401, the bottom of the sleeve 505 is integrally provided with a cover 506, the cover 507 is detachably assembled below the cover 506 by screws, the inside of the cover 506 is elastically movably assembled with a push plate 508 for extruding the epitaxial body 401 by arrayed springs 509, the sleeve 505 is sleeved on the surface of the acoustic wave probe 4, and the outer ring 510 is sleeved on the outer surface of the sleeve 505, both sides of the inner wall of the outer ring 510 are integrally provided with a coil spring housing 511 for rotating connection with the sleeve 505, the other two sides of the inner wall of the outer ring 510 are integrally provided with a coil spring housing 512 for rotating connection with the slider 513, and the inside of the coil spring housing 511 and the coil spring housing 512 is provided with a coil spring, and the slider 513 is embeddedly and slidably assembled in the inside of the guide frame 501.

[0075] According to the above structure, in the process of installing the acoustic wave probe 4, the acoustic wave probe 4 is inserted into the sleeve 505, the epitaxial body 401 is placed in the cover 506 and abuts against the push plate 508, then the cover 507 is assembled below the cover 506 by screws, and the installation of the acoustic wave probe 4 is completed. When the acoustic wave probe 4 is attached to the surface of the concrete and placed on both sides of the crack, the position between the acoustic wave probe 4 and the sleeve 505 will change when the distance between the crack plane and the bottom surface of the handheld machine 1 changes. The epitaxial body 401 will push the push plate 508 to change the position and extrude the spring 509, so as to adapt to the detection position of different plane heights. When the crack plane is a curved surface, the angle between the sleeve 505 and the outer ring 510 will change, and the coil springs in the coil spring housings 511 and 512 will shrink or stretch correspondingly to adapt to various shapes of detection surface.

[0076] Referring to the accompanying drawings Figures 7-8 The inside of the handheld machine 1 is rotatably assembled with a double-threaded screw 515, and the surfaces of the two sections of the double-threaded screw 515 are both screwed with a ring sleeve 517, the bottom edge of the circular hole of the ring sleeve 517 is inversely beveled, the inside of the handheld machine 1 and one side of the double-threaded screw 515 are symmetrically and fixedly provided with a horizontal guide 514 for guiding the movement of the ring sleeve 517, the inside of the handheld machine 1 and the other side of the double-threaded screw 515 are fixedly provided with a distance plate 516, one end of the ring sleeve 517 is assembled with a displacement sensor 518 for cooperating with the distance plate 516 and detecting the moving distance, the other end of the ring sleeve 517 is provided with a vertical slot 526, and the middle part of the double-threaded screw 515 is fixedly sleeved with a gear 525;

[0077] Referring to the accompanying drawings Figures 7-8The middle of the inner side of the handset 1 is fixedly provided with a motor 519, and a transmission shaft 520 is rotatably arranged in the inner side of the handset 1 and located at the side of the motor 519. The output end of the motor 519 is in meshing transmission connection with the transmission shaft 520 through a bevel gear set. The transmission shaft 520 is externally provided with a worm tube 521, and a gear 524 is rotatably arranged in the inner side of the handset 1 and in meshing connection with the worm tube 521. The gear 524 is in meshing connection with a gear 525. The inner wall of the bottom of the worm tube 521 is fixedly provided with a pointed tooth 522 in an arrayed manner. The bottom of the transmission shaft 520 is slidably provided with a pointed tooth gear 523, and the pointed tooth gear 523 is in separable meshing connection with the pointed tooth 522. The middle of the outer wall of the motor 519 is fixedly connected with a plug-in frame 527, and the pointed tooth gear 523 is rotatably arranged at the top end of the plug-in frame 527.

[0078] According to the above structure, when the trigger handle 104 is gripped, the pulling rod 107 drives the lever 110 to rotate, the lever 110 drives the lever 111, and the levers 111 at both ends finally drive the guide frame 501 to move away from the concrete surface and press the spring 504. At this time, the ultrasonic probe 4 can move without friction with the concrete surface.

[0079] With the movement of the guide frame 501, the sleeve 505 enters the circular hole of the ring sleeve frame 517. The chamfer at the bottom of the circular hole is beneficial to guide the sleeve 505 to enter. The plug-in frame 527 on one side of the guide frame 501 carries the pointed tooth gear 523 into the interior of the worm tube 521. At this time, the pointed tooth gear 523 is in meshing connection with the pointed tooth 522. Then, the motor 519 is started, the output shaft drives the transmission shaft 520 to rotate through the bevel gear set. The transmission shaft 520 drives the pointed tooth gear 523 and the worm tube 521 to rotate. Then, through the meshing connection of the worm tube 521 and the gear 524 and the meshing connection of the gear 524 and the gear 525, the double-threaded screw rod 515 is finally driven to rotate. Since the two ring sleeve frames 517 are screwed on the two sections of the double-threaded screw rod 515, the two ring sleeve frames 517 carry the two ultrasonic probes 4 to move in opposite directions.

[0080] The above process provides the pitch adjusting mechanism 5 capable of changing the distance between the two ultrasonic probes 4. The distance between the ultrasonic probe 4 and the crack can be automatically changed without moving the handset 1 by the operator. In addition, before the position is changed, the trigger handle 104 needs to be gripped, the ultrasonic probe 4 needs to be moved away from the concrete surface, and the pointed tooth gear 523 needs to be deeply inserted into the worm tube 521. Then, the ultrasonic probe 4 can be driven to move by the motor 519. Two measures are provided to protect the movement of the ultrasonic probe 4, so that the ultrasonic probe 4 can move without friction with the concrete surface.

[0081] The working principle of the present application is that the sound wave probe 4 is inserted into the sleeve 505, and the cover 507 is assembled below the cover 506 by screws, thereby completing the installation of the sound wave probe 4, when the operator holds the trigger handle 104, the pulling rod 107 drives the lever 110 to rotate, the lever 110 drives the lever 111, and the levers 111 at both ends finally drive the guide frame 501 to move away from the concrete surface and press the spring 504, at this time, the sound wave probe 4 can move without friction with the concrete surface;

[0082] With the movement of the guide frame 501, the sleeve 505 enters the circular hole of the ring sleeve frame 517, the chamfer at the bottom of the circular hole facilitates the entry of the sleeve 505, and the insertion frame 527 on one side of the guide frame 501 carries the bevel gear 523 into the interior of the worm pipe 521, at this time, the bevel gear 523 meshes with the bevel gear 522, then the motor 519 is started through the operation panel 102, the output shaft drives the transmission shaft 520 to rotate through the helical gear set, the transmission shaft 520 drives the bevel gear 523 and the worm pipe 521 to rotate at this time, then through the meshing of the worm pipe 521 and the gear 524, the meshing of the gear 524 and the gear 525, the double-threaded screw 515 is finally driven to rotate, since the two ring sleeve frames 517 are screwed on the two sections of the double-threaded screw 515, the two ring sleeve frames 517 carry the two sound wave probes 4 to move in opposite directions.

[0083] Embodiment three:

[0084] Referring to the drawings Figures 9-12 The smearing mechanism 6 comprises a long slot rod 601, a penetrating rod 606, and a belt frame 623, the middle of the handheld machine 1 is fixedly provided with a guide plate 602, and the long slot rod 601 is slidably assembled with the guide plate 602, both ends of the handheld machine 1 are rotatably connected with a lever 112 which is arranged in parallel with the long slot rod 601, one end of the lever 112 is connected with the middle of the corresponding pulling rod 107, and the other end of the lever 112 is connected with the long slot rod 601, a sliding plate 603 is slidably assembled in the vertical slot 526, the top of the sliding plate 603 is fixedly connected with an extension rod 604, the top end of the extension rod 604 is slidably inserted into the straight slot of the two sections of the long slot rod 601, the bottom of the sliding plate 603 is fixedly provided with a guide shell 605 which is slidably assembled with the penetrating rod 606, the penetrating rod 606 is integrally provided with a fixed pipe 607 at the end away from the other, a spring 608 is connected between the outer wall of the fixed pipe 607 and the outer wall of the guide shell 605, and the inner walls of both ends of the handheld machine 1 are fixedly provided with a limiting abutting rod 621 for limiting the movement range of the fixed pipe 607;

[0085] Referring to the drawings Figures 9-12The inner through type rotating assembly of the fixed pipe 607 is provided with an inner shaft 609, the top end of the inner shaft 609 is fixedly provided with a gear three 610, the bottom end of the inner shaft 609 is fixedly provided with a herringbone rod 611, the surface of one end of the herringbone rod 611 is fixedly provided with a soft brush 612, the surface of the other end of the herringbone rod 611 is arrayed with a nozzle 613, one side of the bottom of the inner shaft 609 is fixedly assembled with a liquid valve 614, the bottom of the liquid valve 614 is connected with a liquid pipe one 615 which is communicated with the nozzle 613, one side of the liquid valve 614 is connected with a liquid pipe two 616 which extends to the bottom of the herringbone rod 611, the inner elastic expansion type assembly of the liquid valve 614 is provided with a valve core rod 617 for controlling the on-off of the liquid pipe one 615 and the liquid pipe two 616, and the top end of the valve core rod 617 is integrally provided with an arc body 618, the outer wall of the fixed pipe 607 is integrally provided with a ring frame 619, and one side of the lower surface of the ring frame 619 is integrally provided with a trigger protrusion 620, when the arc body 618 is extruded with the trigger protrusion 620, the liquid pipe one 615 and the liquid pipe two 616 are communicated, and the bottom end of the liquid pipe two 616 is sealingly rotatably connected with a syringe tube 622.

[0086] Referring to the drawings Figures 9-12 The two belt frames 623 are symmetrically fixedly installed at both ends in the handheld machine 1, the inner side of the belt frame 623 is assembled with a wide sawtooth caterpillar belt 624 which is engaged with the corresponding gear three 610, the inner side of the belt frame 623 is rotatably assembled with a driving roller 625 for driving the wide sawtooth caterpillar belt 624 to work, the upper side of the handheld machine 1 is fixedly installed with a double-shaft motor 626 which is located at the middle position between the two belt frames 623, and the two ends of the output shaft of the double-shaft motor 626 are drivingly connected with the two driving rollers 625 through the bevel gear set engagement.

[0087] According to the above structure, in the process of holding the trigger handle 104, the traction rod 107 simultaneously pulls the lever three 112 to rotate, the two levers three 112 immediately drive the long slot rod 601 to move along the guide plate 602, the extension rod 604 immediately drives the sliding plate 603 to move along the vertical slot 526, finally, the two penetrating rods 606 and the herringbone rod 611 move a small distance to the concrete surface, and the herringbone rod 611 finally reaches between the end of the acoustic probe 4 and the concrete surface, in the process, the gear three 610 is engaged with the wide sawtooth caterpillar belt 624 at all times, when the ring sleeve frame 517 carries the acoustic probe 4 to move, the penetrating rod 606 and the herringbone rod 611 also move, and at this time the double-shaft motor 626 works and drives the wide sawtooth caterpillar belt 624 to work, so as to ensure that the herringbone rod 611 does not rotate while moving horizontally;

[0088] When the sonic probe 4 completes the detection of a certain point, the sonic probe 4 will first move away from the concrete surface, and the herringbone rod 611 will be placed between the end of the sonic probe 4 and the concrete surface. Before the sonic probe 4 changes position, the double-shaft motor 626 is controlled to work, the inner shaft 609 is driven to rotate by the meshing of the wide sawtooth track 624 and the gear three 610, and the inner shaft 609 and the fixed pipe 607 will then move relatively in rotation. The soft brush 612 at one end of the herringbone rod 611 will first contact the end of the sonic probe 4 and clean the impurities on the surface of the sonic probe 4. The nozzle 613 will then continuously approach the sonic probe 4. During the rotation process, the arc surface body 618 at the top end of the valve core rod 617 will be extruded with the trigger protrusion 620, the valve core rod 617 will be retracted into the liquid valve 614, and the liquid pipe one 615 and the liquid pipe two 616 will be communicated. At this time, the coupling agent introduced by the injection pipe 622 will pass through the liquid pipe two 616 and the liquid pipe one 615, and finally be sprayed to the surface of the sonic probe 4 by the nozzle 613, so as to complete the work of smearing the coupling agent on the surface of the sonic probe 4.

[0089] When the fixed pipe 607 moves to the limit position at both ends, the limit abutting rod 621 will abut against the fixed pipe 607. With the continuous movement of the ring sleeve frame 517, the penetrating rod 606 will move relatively with the guide shell 605 and extrude the spring three 608 at the same time. This process is used to avoid the extension of the herringbone rod 611 to the outside of the hand-held machine 1 and to avoid collision with external objects.

[0090] The above process provides the smearing mechanism 6 which can smear the coupling agent for two sonic probes 4 at the same time. The smearing work of the coupling agent can be automatically completed without moving the hand-held machine 1 by the operator. In addition, before the sonic probe 4 changes position, the herringbone rod 611 will move to between the end of the sonic probe 4 and the concrete surface, and will move with the movement of the sonic probe 4 after completing the smearing, so as to realize that the smearing work of the coupling agent can be carried out once after each fixed-point detection. The structure is compact as a whole, and the space utilization rate is high.

[0091] Referring to Fig. 4 and Figure 13 The injection mechanism 7 includes a coupling agent liquid tank 701 fixedly installed in the inside of the hand-held machine 1 and a connecting bridge 713, and the connecting bridge 713 is located below the coupling agent liquid tank 701. The middle part of the surface of the coupling agent liquid tank 701 is integrally provided with a supplement pipe 702. One side of the middle part of the coupling agent liquid tank 701 is fixedly assembled with a motor two 703. The both ends of the bottom of the coupling agent liquid tank 701 are fixedly connected with guide rods 705, and the distal ends of the guide rods 705 are movably sleeved with hook plates 706. The output end of the motor two 703 is fixedly connected with a rotating arm 704, and the both ends of the rotating arm 704 are connected with the two hook plates 706 through connecting arms 707.

[0092] Referring to Fig. 4 and Figure 13The two ends of the connecting bridge 713 are fixedly provided with injectors 708, the two sides of the middle part of the connecting bridge 713 are integrally provided with baffles 710, the inside of the injector 708 is telescopically provided with a piston piece, one end of the piston piece outside the injector 708 is fixedly connected with an end plate 709, the hook plate 706 is arranged on one side of the end plate 709 close to the injector 708 and is used for carrying the piston piece to move, the spring four 711 is connected between the end plate 709 and the corresponding baffle 710, one end of the injector 708 away from the end plate 709 is connected with a suction pipe 712, and the suction pipe 712 is connected with the end of the injection pipe 622 at the same time, the inside of the one end of the suction pipe 712 and the injection pipe 622 close to the injector 708 is provided with a one-way valve, and the other end of the suction pipe 712 is connected with the coupling agent liquid tank 701.

[0093] According to the above structure, under the premise of detection work preparation, the motor two 703 is controlled to work and make the rotating arm 704 rotate, the rotating arm 704 drives the two hook plates 706 to move towards each other along the guide rod 705 through the connecting arm 707, at this time, the two end plates 709 move towards each other together with the piston piece and press the corresponding spring four 711, the injector 708 generates suction force, which can suck the coupling agent in the coupling agent liquid tank 701 into the inside of the injector 708 through the suction pipe 712, after the hook plate 706 resets, the coupling agent in the injection pipe 622 is kept at a certain injection pressure through the elastic force of the compressed spring four 711, so that when the liquid pipe one 615 and the liquid pipe two 616 communicate, the coupling agent can be quickly sprayed to the surface of the acoustic probe 4 through the nozzle 613.

[0094] The working principle of the present application is as follows: under the premise of detection work preparation, the motor two 703 is controlled to work and make the rotating arm 704 rotate, the rotating arm 704 drives the two hook plates 706 to move towards each other along the guide rod 705 through the connecting arm 707, at this time, the two end plates 709 move towards each other together with the piston piece and press the corresponding spring four 711, the injector 708 generates suction force, which can suck the coupling agent in the coupling agent liquid tank 701 into the inside of the injector 708 through the suction pipe 712, after the hook plate 706 resets, the coupling agent in the injection pipe 622 is kept at a certain injection pressure through the elastic force of the compressed spring four 711, so that when the liquid pipe one 615 and the liquid pipe two 616 communicate, the coupling agent can be quickly sprayed to the surface of the acoustic probe 4 through the nozzle 613.

[0095] As shown in Figures 14-15 A railway bridge and tunnel concrete crack detection method based on cloud computing is provided, and the specific steps are as follows:

[0096] S1: The two acoustic probes 4 are controlled by the handheld machine 1 to detect the depth of the concrete cracks at the to-be-detected position;

[0097] S2: By the hand of the operator using the thumb control button 103, control the work of equal distance adjustment, coupling agent smearing, wherein the trigger handle 104 is triggered every time the distance is triggered;

[0098] S3: When the crack depth is detected by the acoustic probe 4, the equal distance adjustment is immediately ended;

[0099] S4: The concrete crack depth information of the detection position is uploaded to the cloud computing database;

[0100] S5: Replace the detection position and repeat steps S1 to S4;

[0101] S6: The crack depth information of each point is integrated, analyzed and calculated in the cloud computing system, and the risk degree is judged.

[0102] The working principle of the present application is that the above detection method can end the position adjustment work of the acoustic probe 4 in time when the crack depth is measured, which conforms to the normal process of existing crack detection. In addition, the information of each detection is uploaded to the cloud computing system through the internet data interaction system in the detector 2, the cloud computing system integrates, analyzes and calculates the crack depth information of each place, deduces the forming condition of the crack, then accesses other detection data information between different devices, integrates the concrete hardness information and size information, and finally analyzes the risk degree of the crack.

[0103] The above is only the preferred embodiment of the present application, it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks, comprising a handheld device (1), a detector (2), and an acoustic wave probe (4), characterized in that: The detector (2) is detachably mounted on the surface of the handheld device (1); a display screen (3) for displaying an image of the crack direction is fixedly mounted on the outer wall of one side of the handheld device (1); the acoustic wave probe (4) is detachably assembled inside the handheld device (1); a distance adjustment mechanism (5) for adjusting the distance between the two acoustic wave probes (4) is provided on one side of the handheld device (1); a coating mechanism (6) for coating the end of the acoustic wave probe (4) with coupling agent is provided inside the handheld device (1) and on one side of the distance adjustment mechanism (5); an injection mechanism (7) for injecting coupling agent is provided on the side of the coating mechanism (6) away from the distance adjustment mechanism (5); and a battery (8) is detachably mounted on the side of the handheld device (1) away from the distance adjustment mechanism (5); Handles (101) are fixedly mounted on both ends of the surface of the handheld device (1), and an operation panel (102) is integrally provided on the inner side of the end of the handle (101), and an operation button (103) for performing a detection operation is provided on the surface of the operation panel (102); The operator controls the detector (2), the distance adjustment mechanism (5), the smearing mechanism (6) and the injection mechanism (7) by pressing the operation button (103) with the thumb; The distance adjustment mechanism (5) provides two measures to protect the movement of the sonic probe (4), so that the sonic probe (4) is kept away from the concrete surface before changing its position; The smearing mechanism (6) includes a herringbone rod (611). Before the acoustic probe (4) changes position, the herringbone rod (611) moves between the end of the acoustic probe (4) and the concrete surface to first remove impurities on the surface and then apply the coupling agent. The inner side of the handle (101) is rotatably connected to a trigger handle (104), and the end of the trigger handle (104) away from the transfer point is connected to a traction rod (107). Both ends of the interior of the handheld device (1) are rotatably mounted with a pry bar 1 (110) and a pry bar 2 (111). The bottom end of the traction rod (107) extends into the interior of the handheld device (1) and is connected to one end of the corresponding pry bar 1 (110), and the other end of the pry bar 1 (110) is connected to one end of the pry bar 2 (111); The distance adjustment mechanism (5) includes a guide frame (501), the inner walls of both ends of the handheld device (1) are fixedly provided with guide posts (503), and the two ends of the guide frame (501) are movably sleeved on the surface of the guide posts (503), the surface of the guide posts (503) is sleeved with a spring 1 (504) for resetting the guide frame (501), and the other ends of the two pry bars (111) are connected to the two ends of the guide frame (501); The handheld device (1) is internally rotatably assembled with a double-threaded screw (515), and the surfaces of both ends of the double-threaded screw (515) are screwed with a ring frame (517), and a horizontal guide frame (514) for guiding the movement of the ring frame (517) is symmetrically fixedly provided inside the handheld device (1) and located on one side of the double-threaded screw (515), and a distance measuring plate (516) is fixedly provided inside the handheld device (1) and located on the other side of the double-threaded screw (515), and a displacement sensor (518) for cooperating with the distance measuring plate (516) and detecting the moving distance is assembled at one end of the ring frame (517), and a vertical slot (526) is provided at the other end of the ring frame (517), and a gear 2 (525) is fixedly provided in the middle of the double-threaded screw (515); A motor 1 (519) is fixedly installed in the middle of one side of the handheld device (1), and a transmission shaft (520) is rotatably assembled inside the handheld device (1) and located on one side of the motor 1 (519). The output end of the motor 1 (519) is meshed with the transmission shaft (520) through a helical gear set. The outer surface of the transmission shaft (520) is sleeved with a worm tube (521), and a gear 1 (524) meshing with the worm tube (521) is rotatably assembled inside the handheld device (1). The gear 1 (524) is meshed with the worm tube (521). 24) and meshed with gear 2 (525) at the same time. The inner wall of the bottom of the worm tube (521) is fixedly provided with a pointed bevel gear (522) in an array. The bottom of the transmission shaft (520) is slidably sleeved with a pointed bevel gear (523), and the pointed bevel gear (523) and the pointed bevel gear (522) are detachably meshed. The guide frame (501) is fixedly connected to a plug-in frame (527) near the middle of the outer wall of the motor 1 (519), and the pointed bevel gear (523) is rotatably assembled on the top of the plug-in frame (527).

2. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 1 is characterized by: The operation button (103) is electrically connected to the detector (2) via a data line connection. A pressure sensor (105) is fixedly provided on the inner wall of the handle (101), and a pressure block (106) is integrally provided on the surface of the trigger handle (104) and near the pressure sensor (105). A support block (109) is provided on the lower surface of the handheld device (1) and on one side near the display screen (3). A soft pad (108) is adhered to the other side of the lower surface of the handheld device (1), and the bottom end of the support block (109) and the soft pad (108) are in the same plane.

3. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 2 is characterized by: A camera (502) is embedded in the middle of the guide frame (501), and the camera (502) is electrically connected to the display screen (3). Elastic rotating components for mounting the sonic probe (4) are slidably assembled on both sides of the guide frame (501). The elastic group rotation component includes a sleeve (505), a cover shell (507), an outer ring (510) and a slider (513), the outer wall of the acoustic wave probe (4) is integrally provided with an extension body (401), the bottom of the sleeve (505) is integrally provided with a cover shell (506), the cover shell (507) is detachably assembled below the cover shell (506) by screws, the interior of the cover shell (506) is elastically assembled with a push plate (508) for squeezing the extension body (401) through an array of springs (509), the sleeve (5 05) is sleeved on the surface of the sonic probe (4), and the outer ring body (510) is sleeved on the outer surface of the sleeve (505), and the two sides of the inner wall of the outer ring body (510) are integrally provided with a coil spring shell (511) for rotationally connecting with the sleeve (505), and the other two sides of the inner wall of the outer ring body (510) are integrally provided with a coil spring shell (512) for rotationally connecting with the slider (513), and the coil spring shell (511) and the coil spring shell (512) are both provided with coil springs, and the slider (513) is embedded and slidably assembled inside the guide frame (501).

4. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 3 is characterized by: The smearing mechanism (6) includes a long slot rod (601), a through rod (606) and a belt rack (623). A guide plate (602) is fixedly provided in the middle of the handheld device (1), and the long slot rod (601) and the guide plate (602) are assembled in a sliding manner. The two ends of the handheld device (1) are rotatably connected to a pry bar three (112) arranged in parallel with the long slot rod (601). One end of the pry bar three (112) is connected to the middle of the corresponding traction rod (107), and the other end of the pry bar three (112) is connected to the long slot rod (601). The interior of the vertical slot (526) is slidably assembled with a slide plate (603). ), and the top of the slide plate (603) is fixedly connected to the extension rod (604), the top of the extension rod (604) is slidably inserted into the straight groove opened by the two sections of the long groove rod (601), the bottom of the slide plate (603) is fixedly provided with a guide shell (605) slidably assembled with the through rod (606), the two ends of the through rods (606) are both integrally provided with a fixed tube (607), and a spring (608) is connected between the outer wall of the fixed tube (607) and the outer wall of the guide shell (605), and the inner walls of the two ends of the handheld device (1) are fixedly provided with a limit rod (621) for limiting the moving range of the fixed tube (607); The fixed tube (607) is internally rotated and assembled with an inner shaft (609), the top of the inner shaft (609) is fixedly mounted with a gear three (610), the bottom of the inner shaft (609) is fixedly mounted with a herringbone rod (611), a soft brush (612) is fixedly arranged on the surface of one end of the herringbone rod (611), and a nozzle (613) is arranged in an array on the surface of the other end of the herringbone rod (611), a liquid valve (614) is fixedly assembled on one side of the bottom of the inner shaft (609), the bottom of the liquid valve (614) is connected to a liquid pipe one (615) communicating with the nozzle (613), and one side of the liquid valve (614) is connected to a nozzle extending to the bottom of the herringbone rod (611). Liquid pipe 2 (616), the liquid valve (614) is internally elastically and telescopically assembled with a valve core rod (617) for controlling the connection and disconnection of liquid pipe 1 (615) and liquid pipe 2 (616), and the top of the valve core rod (617) is integrally provided with an arcuate body (618), the outer wall of the fixed pipe (607) is integrally provided with a ring frame (619), and one side of the lower surface of the ring frame (619) is integrally provided with a trigger protrusion (620), when the arcuate body (618) and the trigger protrusion (620) are squeezed, liquid pipe 1 (615) and liquid pipe 2 (616) are communicated, and the bottom end of liquid pipe 2 (616) is sealingly and rotatably connected with an injection tube (622); The two belt racks (623) are symmetrically fixedly installed at the two ends of the inside of the handheld device (1), and the inner side of the belt rack (623) is assembled with a wide sawtooth track (624) that meshes with the corresponding gear three (610). The inner side of the belt rack (623) is rotatably assembled with an active roller (625) for driving the wide sawtooth track (624) to operate. A dual-axis motor (626) is fixedly installed inside the handheld device (1) and above the middle position of the two belt racks (623). The two ends of the output shaft of the dual-axis motor (626) are meshed and connected with the two active rollers (625) through a helical gear set.

5. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 4 is characterized by: The injection mechanism (7) comprises a coupling agent liquid tank (701) and a connecting bridge (713) fixedly mounted inside the handheld device (1), and the connecting bridge (713) is located below the coupling agent liquid tank (701). A supplementary tube (702) is integrally provided in the middle of the surface of the coupling agent liquid tank (701). A second motor (703) is fixedly assembled on one side of the middle of the coupling agent liquid tank (701). The two ends of the bottom of the coupling agent liquid tank (701) are fixedly connected to a guide rod (705), and the end of the guide rod (705) is movably sleeved with a hook plate (706). The output end of the second motor (703) is fixedly connected to a rotating arm (704), and the two ends of the rotating arm (704) are connected to the two hook plates (706) via a connecting arm (707).

6. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 5, characterized in that: Both ends of the connecting bridge (713) are fixedly mounted with syringes (708), and baffles (710) are integrally provided on both sides of the middle of the connecting bridge (713). The interior of the syringe (708) is telescopically assembled with a piston, and the end of the piston located outside the syringe (708) is fixedly connected to an end plate (709), and the hook plate (706) is placed on the side of the end plate (709) close to the syringe (708) and is used to carry the piston to move. A spring (711) is connected between the end plate (709) and the corresponding baffle (710), and the end of the syringe (708) away from the end plate (709) is connected to a suction tube (712), and is also connected to the end of the syringe (622), and a one-way valve is installed inside the suction tube (712) and the end of the syringe (622) close to the syringe (708), and the other end of the suction tube (712) is connected to the coupling agent liquid tank (701).

7. A method for detecting cracks in railway bridge and tunnel concrete based on cloud computing, using the automatic detection device for cracks in railway bridge and tunnel concrete as claimed in claim 6, characterized in that: The specific steps are as follows: S1: Using a handheld device (1) to control two acoustic wave probes (4) to perform depth detection of concrete cracks at the location to be detected; S2: The user uses the thumb to control the operation button (103) to complete the work of isometric adjustment and coupling agent application, wherein pinching the trigger handle (104) is the trigger operation for each distance adjustment; S3: When the sonic probe (4) detects the crack depth, the equal distance adjustment ends immediately; S4: Uploading the concrete crack depth information at the detection location to the cloud computing database; S5: Change the detection position and repeat steps S1 to S4; S6: In the cloud computing system, the crack depth information at each point is integrated, analyzed and calculated, and the degree of danger is judged.

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