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

Abstract

The invention belongs to the technical field of detection tools, and particularly relates to a railway bridge and tunnel concrete crack automatic detection device and method.The railway bridge and tunnel concrete crack automatic detection device comprises a handheld set, a detector and a sound wave probe, and the detector is detachably installed on the surface of the handheld set; a display screen used for displaying crack trend images is fixedly installed on the outer wall of one side of the handheld set, the sound wave probes are detachably assembled in the handheld set, and a distance adjusting mechanism used for adjusting the distance between the two sound wave probes is arranged on one side of the interior of the handheld set. A smearing mechanism used for smearing a coupling agent on the end portion of the sonic probe is arranged in the handheld machine and located on one side of the distance adjusting mechanism, and an injection mechanism used for injecting the coupling agent is arranged on the side, away from the distance adjusting mechanism, of the smearing mechanism. According to the invention, the distance between the probe and the crack and the smearing of the coupling agent can be automatically changed, and only one-man operation is needed and it is ensured that the handset is attached to the concrete surface.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection tools, and in particular relates to a device and method for automatic detection of concrete cracks in railway bridges and tunnels based on cloud computing. Background Art

[0002] Crack depth detection devices are non-destructive testing tools used to measure the depth of cracks on the surface of concrete or other materials. Such devices are usually based on the principle of sound wave diffraction and measure the depth of cracks by transmitting and receiving ultrasonic waves. Crack depth detection devices are widely used in the maintenance and inspection of structures such as bridges, tunnels, buildings and concrete pavements. These instruments can accurately measure the depth of cracks and help engineers evaluate the integrity and safety of the structure. Cloud computing is a model that provides on-demand computing services through the Internet, including different levels of provision such as infrastructure, platform and software services. The core of cloud computing is to achieve the centralization and sharing of computing resources, decompose huge data processing tasks through the network and execute them on multiple servers, thereby effectively improving computing efficiency and resource utilization.

[0003] Problems with existing technologies: In the existing work of using ultrasonic movement to detect the depth of cracks, it is generally completed by multiple people. One person is used to hold the ultrasonic probe to complete the work of fixing the probe, adjusting the probe position and applying the coupling agent, and the other person is used to operate the instrument to complete the depth detection work. The above operation is also used for the detection of complex bridge holes or tunnel cracks. This method requires the cooperation of multiple people and the operation is cumbersome. Among the existing equipment, there is no device that can complete all the above tasks at the same time; For a device that can realize single-person inspection work, how to control the two probes and change their distance from the cracks and automatically complete the application of coupling agent under the premise of ensuring the normal inspection process are all problems that need to be overcome urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a cloud computing-based railway bridge and tunnel concrete crack automatic detection device and method, which can automatically change the distance between the probe and the crack and the application of coupling agent. It only requires one person to operate and ensure that the handheld device is in contact with the concrete surface.

[0005] The technical solution adopted by the present invention is as follows: A cloud computing-based railway bridge and tunnel concrete crack automatic detection device comprises a handheld device, a detector and an acoustic wave probe, wherein the detector is detachably mounted on the surface of the handheld device, a display screen for displaying crack direction images is fixedly mounted on an outer wall of one side of the handheld device, the acoustic wave probe is detachably assembled inside the handheld device, a distance adjustment mechanism for adjusting the distance between two acoustic wave probes is arranged on one side inside the handheld device, a coating mechanism for coating the end of the acoustic wave probe with a coupling agent is arranged on one side inside the handheld device and located at the distance adjustment mechanism, an injection mechanism for injecting the coupling agent is arranged on one side of the coating mechanism away from the distance adjustment mechanism, and a battery is detachably mounted on one side inside the handheld device and away from the distance adjustment mechanism; Handles are fixedly mounted on both ends of the surface of the handheld device, and an operation panel is integrally arranged on the inner side of the handle end, and operation buttons for performing detection work are arranged on the surface of the operation panel; The operator controls the detector, the distance adjustment mechanism, the smearing mechanism and the injection mechanism by pressing the operation button with the thumb; The distance adjustment mechanism provides two measures to protect the movement of the sonic probe, so that the sonic probe is away from the concrete surface before changing position; The coating mechanism comprises a herringbone rod, which moves between the end of the sonic probe and the concrete surface before the sonic probe changes position, first removes impurities on the surface and then coats the coupling agent.

[0006] The operation button is electrically connected to the detector by a data line connection, the inner side of the handle is rotatably connected to a trigger handle, the inner wall of the handle is fixedly provided with a pressure sensor, and a pressure block is integrally provided on the surface of the trigger handle and near the pressure sensor, a support block is provided on one side of the lower surface of the handheld device and near the display screen, a soft pad is attached to the other side of the lower surface of the handheld device, and the bottom end of the support block is in the same plane as the soft pad; The end of the trigger handle away from the transfer point is connected to a traction rod, and pry bar 1 and pry bar 2 are rotatably installed at both ends inside the handheld device. The bottom end of the traction rod extends into the handheld device and is connected to one end of the corresponding pry bar 1, and the other end of the pry bar 1 is connected to one end of the pry bar 2.

[0007] The distance adjustment mechanism comprises a guide frame, guide posts are fixedly arranged on the inner walls at both ends of the handheld device, and the two ends of the guide frame are movably sleeved on the surface of the guide posts, the surface of the guide posts is sleeved with a spring 1 for resetting the guide frame, the other ends of the two pry bars 2 are connected to the two ends of the guide frame, a camera is embedded in the middle of the guide frame, and the camera is electrically connected to the display screen, and elastic group rotation components for installing the sound wave probe are slidably assembled on both sides of the guide frame; The elastic rotation assembly includes a sleeve shell, a second cover shell, an outer ring body and a slider. The outer wall of the acoustic wave probe is integrally provided with an extension body, the bottom of the sleeve shell is integrally provided with a cover shell 1, the cover shell 2 is detachably assembled under the cover shell 1 by screws, the interior of the cover shell 1 is elastically assembled with a push plate for squeezing the extension body through two springs arranged in an array, the sleeve shell is sleeved on the surface of the acoustic wave probe, and the outer ring body is sleeved on the outer surface of the sleeve shell, the two sides of the inner wall of the outer ring body are integrally provided with a coil spring shell 1 for rotationally connected to the sleeve shell, the other two sides of the inner wall of the outer ring body are integrally provided with a coil spring shell 2 for rotationally connected to the slider, and coil springs are arranged inside the coil spring shell 1 and the coil spring shell 2, and the slider is embedded and slidably assembled inside the guide frame.

[0008] A double-threaded screw is assembled for rotation inside the handheld device, and ring frames are screwed on the surfaces of the two sections of the double-threaded screw. A horizontal guide frame for guiding the movement of the ring frame is symmetrically fixedly arranged inside the handheld device and on one side of the double-threaded screw. A distance measuring plate is fixedly arranged inside the handheld device and on the other side of the double-threaded screw. A displacement sensor for cooperating with the distance measuring plate and detecting the moving distance is assembled at one end of the ring frame, and a vertical groove is opened at the other end of the ring frame. A gear 2 is fixedly sleeved at the middle of the double-threaded screw.

[0009] A motor 1 is fixedly installed in the middle of one side of the handheld device, and a transmission shaft is rotatably assembled inside the handheld device and located on one side of the motor 1. The output end of the motor 1 is meshingly connected to the transmission shaft through a bevel gear set. A worm tube is sleeved on the outer surface of the transmission shaft, and a gear 1 meshing with the worm tube is rotatably assembled inside the handheld device. The gear 1 is simultaneously meshed with gear 2. The inner wall of the bottom of the worm tube is fixedly provided with pointed bevel teeth in an array, and a pointed bevel gear is slidably sleeved on the bottom of the transmission shaft, and the pointed bevel gear is detachably meshed with the pointed bevel teeth. The guide frame is fixedly connected to a plug-in frame near the middle of the outer wall of the motor 1, and the pointed bevel gear is rotatably assembled on the top of the plug-in frame.

[0010] The smearing mechanism includes a long groove rod, a penetration rod and a belt frame. A guide plate is fixedly arranged in the middle of the handheld device, and the long groove rod and the guide plate are slidably assembled. The two ends of the handheld device are rotatably connected with a pry bar three arranged parallel to the long groove rod, one end of the pry bar three is connected to the middle part of the corresponding traction rod, and the other end of the pry bar three is connected to the long groove rod. A slide plate is slidably assembled inside the vertical groove, and the top of the slide plate is fixedly connected to the extension rod, and the top of the extension rod is slidably inserted into the straight groove opened by the two sections of the long groove rod, and the bottom of the slide plate is fixedly provided with a guide shell slidably assembled with the penetration rod, and the ends of the two penetration rods that are away from each other are integrally provided with fixed tubes, and a spring three is connected between the outer wall of the fixed tube and the outer wall of the guide shell, and the inner walls of the two ends of the handheld device are fixedly provided with limit push rods for limiting the moving range of the fixed tube.

[0011] The fixed tube is internally through-type rotatably assembled with an inner shaft, the top end of the inner shaft is fixedly mounted with a gear three, the bottom end of the inner shaft is fixedly mounted with a herringbone rod, the surface of one end of the herringbone rod is fixedly mounted with a soft brush, the surface of the other end of the herringbone rod is array-type with a nozzle, one side of the bottom of the inner shaft is fixedly assembled with a liquid valve, the bottom of the liquid valve is connected with a liquid tube one communicating with the nozzle, one side of the liquid valve is connected with a liquid tube two extending to the bottom of the herringbone rod, the inside of the liquid valve is elastically telescopically assembled with a valve core rod for controlling the connection and disconnection of liquid tube one and liquid tube two, and the top end of the valve core rod is integrally provided with an arc surface body, the outer wall of the fixed tube is integrally provided with a ring frame, and one side of the lower surface of the ring frame is integrally provided with a trigger protrusion, when the arc surface body and the trigger protrusion are squeezed, liquid tube one is communicated with liquid tube two, and the bottom end of liquid tube two is sealingly rotatably connected with an injection tube; The two belt frames are symmetrically fixedly installed at the two ends of the handheld device, and the inner side of the belt frame is assembled with a wide sawtooth track that is three-phase meshing with the corresponding gears. The inner side of the belt frame is rotatably assembled with an active roller for driving the wide sawtooth track to operate. A double-axis motor is fixedly installed inside the handheld device and above the middle position of the two belt frames. The two ends of the output shaft of the double-axis motor are meshed and connected with the two active rollers through a helical gear set.

[0012] The injection mechanism includes a coupling agent liquid tank and a connecting bridge fixedly installed inside the handheld device, and the connecting bridge is located below the coupling agent liquid tank. A supplementary tube is integrally arranged in the middle of the surface of the coupling agent liquid tank. Motor 2 is fixedly assembled on one side of the middle of the coupling agent liquid tank. Both ends of the bottom of the coupling agent liquid tank are fixedly connected with guide rods, and the end of the guide rod is movably sleeved with a hook plate. The output end of the motor 2 is fixedly connected with a rotating arm, and both ends of the rotating arm are connected to the two hook plates through a connecting arm.

[0013] Syringes are fixedly installed at both ends of the connecting bridge, baffles are integrally provided on both sides of the middle part of the connecting bridge, a piston is telescopically assembled inside the syringe, and the end of the piston located outside the syringe is fixedly connected to an end plate, the hook plate is placed on the side of the end plate close to the syringe and is used to carry the piston to move, a spring four is connected between the end plate and the corresponding baffle, the end of the syringe away from the end plate is connected to a suction tube, and is also connected to the end of the injection tube, the suction tube and the end of the injection tube close to the syringe are both installed with a one-way valve inside, and the other end of the suction tube is connected to the coupling agent liquid tank.

[0014] A railway bridge and tunnel concrete crack detection method based on cloud computing, the specific steps are as follows: S1: Use the handheld device to control two acoustic wave probes to perform depth detection of concrete cracks at the locations to be detected; S2: The operator uses his thumb to control the operation button to complete the work of isometric adjustment and coupling agent application. Squeezing the trigger handle is the trigger operation for each distance adjustment. S3: When the sonic probe detects the crack depth early, the equal distance adjustment ends immediately; S4: Upload 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.

[0015] The technical effects achieved by the present invention are: (1) The present invention provides a device that can be operated by a single person to perform crack detection. The movement of the acoustic wave probe and the application of the coupling agent can be controlled by an operation panel near the thumb of the user. The entire detection process only requires the operator to place the handheld device against the concrete surface and change its position in time, thereby reducing the complexity of traditional detection work.

[0016] (2) The elastic rotating assembly in the distance adjustment mechanism of the present invention enables the sonic probe to be suitable for detection surfaces of different plane heights and shapes, and is suitable for concrete crack detection work in complex structures such as bridge tunnels.

[0017] (3) The present invention provides a distance adjustment mechanism capable of changing the distance between the two sonic wave probes. The distance between the sonic wave probes and the crack can be automatically changed without the operator moving the handheld device. In addition, before changing the position, it is necessary to first hold the trigger handle tightly and keep the sonic wave probe away from the concrete surface. At the same time, it is necessary to first make the pointed bevel gear penetrate into the worm tube before the sonic wave probe can be driven to move by the motor. Two measures are provided to protect the movement of the sonic wave probe, ensuring that the sonic wave probe moves without friction with the concrete surface.

[0018] (4) The present invention provides an injection mechanism for providing power for injecting coupling agent, which can realize multiple coupling agent injection processes when liquid pipe 1 and liquid pipe 2 are connected.

[0019] (5) The detection method provided by the present invention can promptly end the position adjustment of the acoustic probe when the crack depth has been measured, which is in line with the normal process of existing crack detection. In addition, by uploading the detection data to the cloud computing system, not only can the formation of the crack be quickly analyzed, but also the degree of danger of the crack can be analyzed with the help of big data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of a detection device provided by an embodiment of the present invention; Figure 2 yes Figure 1 The local enlarged structure diagram at A in the middle; Figure 3 is a bottom structural diagram of a handset provided by an embodiment of the present invention; Figure 4 is an internal cross-sectional view of a handset provided by an embodiment of the present invention; Figure 5 is a structural disassembly diagram of a distance adjustment mechanism provided by an embodiment of the present invention; Figure 6 is a disassembled diagram of the acoustic wave probe installation structure provided by an embodiment of the present invention; Figure 7 It is a structural diagram of a double-threaded screw and a ring frame provided in an embodiment of the present invention; Figure 8 yes Figure 7 The local enlarged structure diagram at B in the middle; Fig. 9 is a structural disassembly diagram of a coating mechanism provided by an embodiment of the present invention; Fig.10 It is a combined structural diagram of a half long groove rod and a single herringbone rod provided by an embodiment of the present invention; Fig.11 It is a combined structural diagram of a fixed pipe and a herringbone rod provided in an embodiment of the present invention; Fig.12 yes Fig.11 The local enlarged structure diagram at C in the middle; Fig.13 is a structural diagram of an injection mechanism provided by an embodiment of the present invention; Fig.14 Schematic diagram of the detection position change provided by an embodiment of the present invention Fig.15 It is a detection flow chart provided by an embodiment of the present invention.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Handheld device; 101. Handle; 102. Operation panel; 103. Operation button; 104. Trigger handle; 105. Pressure sensor; 106. Pressure block; 107. Drawbar; 108. Soft cushion; 109. Support block; 110. Pry bar 1; 111. Pry bar 2; 112. Pry bar 3; 2. Detector; 3. Display screen; 4. Acoustic wave probe; 401. Epitaxial body; 5. Distance adjustment mechanism; 501. Guide frame; 502. Camera; 503. Guide column; 504. Spring 1; 505. Shell; 506. Cover shell 1; 507. Cover shell 2; 508. Push plate; 509. Spring 2; 510. Outer ring body; 511. Coil spring shell 1; 512. Coil spring shell 2; 513. Slider; 514. Horizontal guide frame; 515. Double-thread screw; 516. Distance measuring plate; 517. Ring frame; 518. Displacement sensor; 519. Motor 1; 520. Transmission shaft; 521. Worm tube; 522. Sharp bevel teeth; 523. Sharp bevel gear; 524. Gear 1; 525. Gear 2; 526. Vertical slot; 527. Plug-in frame; 6. Coating mechanism; 601. Long groove rod; 602. Guide plate; 603. Slide plate; 604. Extension rod; 605. Guide shell; 606. Through 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. Arc surface; 619. Ring frame; 620. Trigger protrusion; 621. Limiting rod; 622. Injection tube; 623. Belt frame; 624. Wide sawtooth track; 625. Active roller; 626. Double-axis motor; 7. Injection mechanism; 701. Coupling agent tank; 702. Supplementary tube; 703. Motor 2; 704. Rotating arm; 705. Guide rod; 706. Hook plate; 707. Connecting arm; 708. Injector; 709. End plate; 710. Baffle; 711. Spring 4; 712. Suction tube; 713. Connecting bridge; 8. Battery. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0023] like Figure 1-Figure 13As shown, a cloud computing-based automatic detection device for concrete cracks in railway bridges and tunnels comprises a handheld device 1, a detector 2 and an acoustic wave probe 4, wherein 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 arranged on one side inside the handheld device 1, a coating mechanism 6 for coating the end of the acoustic wave probe 4 with a coupling agent is arranged inside the handheld device 1 and located on one side of the distance adjustment mechanism 5, an injection mechanism 7 for injecting the coupling agent is arranged 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 inside the handheld device 1 and away from the distance adjustment mechanism 5.

[0024] Embodiment 1: Refer to the attached Figure 1-Figure 3 , handles 101 are fixedly installed at both ends of the surface of the handheld device 1, and an operation panel 102 is integrally arranged on the inner side of the end of the handle 101, and an operation button 103 for performing the detection work is arranged on the surface of the operation panel 102, and the operation button 103 is electrically connected to the detector 2 through a data line connection. 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, and a pressure block 106 is integrally arranged on the surface of the trigger handle 104 and near the pressure sensor 105. A support block 109 is arranged on one side of the lower surface of the handheld device 1 and close to the display screen 3, and a soft pad 108 is pasted on the other side of the lower surface of the handheld device 1, and the bottom end of the support block 109 is in the same plane as the soft pad 108.

[0025] According to the above structure, there is a gap between a part of the lower surface of the handheld device 1 including the support block 109 and the concrete surface, and the existence of the gap is conducive to the movement of the ultrasonic probe 4 and the spraying of the coupling agent, while a part of the lower surface of the handheld device 1 including the soft pad 108 is in contact with the concrete surface.

[0026] Refer to the attached Figure 2 and Figure 5 The end of the trigger handle 104 away from the transfer point is connected to a traction rod 107, and both ends inside the handheld device 1 are rotatably installed with a pry bar 110 and a pry bar 111. The bottom end of the traction rod 107 extends into the handheld device 1 and is connected to one end of the corresponding pry bar 110, and the other end of the pry bar 110 is connected to one end of the pry bar 111.

[0027] According to the above structure, when the detection device is used, the detector 2 and the two acoustic wave probes 4 are installed, and the operator holds the two acoustic wave probes 4 and sticks them to the surface of the concrete. The operator's thumb can control the detector 2, the distance adjustment mechanism 5, the smearing mechanism 6 and the injection mechanism 7 through the operation button 103 on the operation panel 102, wherein the distance adjustment mechanism 5 is used to continuously adjust the distance between the two acoustic wave probes 4 to complete the detection of the crack depth. The detection principle is referred to Fig.14 Before adjusting the position each time, the operator must first hold the trigger handle 104 tightly. When the pressure block 106 on the surface of the trigger handle 104 squeezes the pressure sensor 105, the adjustment of the acoustic wave probe 4 can be carried out. The above process provides a device that can be operated by a single person and perform crack detection. The movement of the acoustic wave probe 4 and the application of the coupling agent can be controlled by the operation panel 102 near the user's thumb. The entire detection process only requires the operator to fit the handheld device 1 to the concrete surface and change the position in time, thereby reducing the complexity and tediousness of traditional detection work.

[0028] The working principle of the present invention is as follows: when using the detection device, the detector 2 and two sonic probes 4 are installed, the operator holds the two sonic probes 4 and places them against the surface of the concrete, and the operator's thumb can control the detector 2, the distance adjustment mechanism 5, the smearing mechanism 6 and the injection mechanism 7 through the operation button 103 on the operation panel 102, wherein the distance adjustment mechanism 5 is used to continuously adjust the distance between the two sonic probes 4, and before each position adjustment, the operator must first hold the trigger handle 104 tightly, and when the pressure block 106 on the surface of the trigger handle 104 squeezes the pressure sensor 105, the position adjustment work of the sonic probe 4 can be carried out; The detector 2 has a built-in Internet data interaction system, which is used to exchange test data with the cloud computing system, complete data processing tasks with the help of multiple servers provided by the system, and can also perform relevant analysis on the data of this task based on the test data of other test tasks provided by third parties in the public cloud, and flexibly provide cloud computing solutions.

[0029] Embodiment 2: Refer to the attached Figure 5 The distance adjustment mechanism 5 includes a guide frame 501, guide posts 503 are fixedly arranged on the inner walls of both ends of the handheld device 1, and both ends of the guide frame 501 are movably sleeved on the surface of the guide posts 503, and 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, and 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, and the two sides of the guide frame 501 are slidably assembled with elastic group rotation components for installing the sound wave probe 4; According to the above structure, the camera 502 is used to photograph the direction of the crack and display it on the display screen 3, so that the staff can adjust the angle of the handheld device 1 in time.

[0030] Refer to the attached Figure 6 The elastic 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 extension 401. The bottom of the sleeve 505 is integrally provided with a cover 506. The cover 507 is detachably assembled under the cover 506 by screws. The interior of the cover 506 is elastically assembled with a push plate 508 for squeezing the extension 401 through an array of springs 509. The sleeve 505 It is sleeved on the surface of the ultrasonic probe 4, and the outer ring body 510 is sleeved on the outer surface of the sleeve shell 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 shell 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.

[0031] According to the above structure, during the installation of the acoustic wave probe 4, the acoustic wave probe 4 is inserted into the sleeve shell 505, the extension body 401 is placed in the cover shell 1 506 and against the push plate 508, and then the cover shell 2 507 is assembled under the cover shell 1 506 by screws, and the installation of the acoustic wave probe 4 is completed. When the acoustic wave probe 4 is attached to the concrete surface and placed on both sides of the crack for work, when the distance between the crack plane and the bottom surface of the handheld device 1 changes, the position of the acoustic wave probe 4 and the sleeve shell 505 will change, and the extension body 401 will push the push plate 508 to change position and squeeze the spring 2 509, which is used for detection positions with different plane heights. When the crack plane is a curved surface, the angle of the acoustic wave probe 4 changes, and the angle between the sleeve shell 505 and the outer ring body 510 will also change. At this time, the coil springs inside the coil spring shell 1 511 and the coil spring shell 2 512 will shrink or stretch accordingly, which is used to cope with detection surfaces of various shapes.

[0032] Refer to the attached Figure 7-Figure 8The handheld device 1 is internally 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 frame 517, and the bottom edge of the circular hole of the ring frame 517 is chamfered. A horizontal guide frame 514 for guiding the movement of the ring frame 517 is symmetrically fixedly arranged inside the handheld device 1 and located on one side of the double-threaded screw 515. A distance measuring plate 516 is fixedly arranged inside the handheld device 1 and located on the other side of the double-threaded screw 515. 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. A vertical groove 526 is opened at the other end of the ring frame 517. A gear 2 525 is fixedly sleeved in the middle of the double-threaded screw 515; Refer to the attached Figure 7-Figure 8 A motor 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 519. The output end of the motor 519 is meshed and connected with the transmission shaft 520 through a bevel gear set. A worm tube 521 is sleeved on the outer surface of the transmission shaft 520, and a gear 524 meshed with the worm tube 521 is rotatably assembled inside the handheld device 1. The gear 524 is also meshed with the gear 2 525. 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 is detachably meshed with the pointed bevel gear 522. A plug-in frame 527 is fixedly connected to the middle of the outer wall of the motor 519 near the guide frame 501, and the pointed bevel gear 523 is rotatably assembled on the top of the plug-in frame 527.

[0033] According to the above structure, when the trigger handle 104 is tightly gripped, the traction rod 107 drives the pry bar 110 to rotate, and the pry bar 110 then drives the pry bar 2 111, and the pry bars 2 111 at both ends will eventually drive the guide frame 501 to move away from the concrete surface and squeeze the spring 1 504 at the same time, so that the sonic probe 4 can move without friction with the concrete surface; As the guide frame 501 moves, the sleeve 505 will enter the circular hole of the ring sleeve frame 517. The chamfered bottom edge of the circular hole is conducive to guiding the sleeve 505 to enter, and the plug-in frame 527 on one side of the guide frame 501 will simultaneously carry the pointed bevel gear 523 deep into the interior of the worm tube 521. At this time, the pointed bevel gear 523 is meshed with the pointed bevel gear 522. Then the motor 1 519 is started, and its output shaft drives the transmission shaft 520 to rotate through the bevel gear set. The transmission shaft 520 can drive the pointed bevel gear 523 and the worm tube 521 to rotate together, and then the worm tube 521 is meshed with the gear 1 524, and the gear 1 524 is meshed with the gear 2 525, and finally the double-threaded screw 515 is driven to rotate. Since the two ring sleeve frames 517 are respectively screwed to the two sections of the double-threaded screw 515, the two ring sleeve frames 517 carry the two acoustic wave probes 4 to move in opposite directions. The above process provides a distance adjustment mechanism 5 that can change the distance between the two acoustic wave probes 4. The distance between the acoustic wave probe 4 and the crack can be automatically changed without the operator moving the handheld device 1. In addition, before changing the position, it is necessary to first hold the trigger handle 104 tightly and keep the acoustic wave probe 4 away from the concrete surface. At the same time, it is necessary to first make the pointed bevel gear 523 penetrate into the worm tube 521 before the acoustic wave probe 4 can be driven to move by the motor 1 519. Two measures are provided to protect the movement of the acoustic wave probe 4 to ensure that the acoustic wave probe 4 moves without friction with the concrete surface.

[0034] The working principle of the present invention is as follows: insert the sonic probe 4 into the sleeve 505, and assemble the cover shell 2 507 under the cover shell 1 506 by screws, and then the installation of the sonic probe 4 is completed. When the operator tightly grasps the trigger handle 104, the traction rod 107 drives the pry bar 110 to rotate, and the pry bar 110 then drives the pry bar 2 111, and the pry bar 2 111 located at both ends will eventually drive the guide frame 501 to move away from the concrete surface and squeeze the spring 1 504 at the same time, so that the sonic probe 4 can move without friction with the concrete surface. As the guide frame 501 moves, the sleeve 505 will enter the circular hole of the ring sleeve frame 517. The chamfered bottom edge of the circular hole is conducive to guiding the sleeve 505 to enter, and the plug-in frame 527 on one side of the guide frame 501 will simultaneously carry the pointed bevel gear 523 deep into the interior of the worm tube 521. At this time, the pointed bevel gear 523 is meshed with the pointed bevel gear 522. Then, the motor 1 519 is started through the operation panel 102, and its output shaft drives the transmission shaft 520 to rotate through the bevel gear set. The transmission shaft 520 can now drive the pointed bevel gear 523 and the worm tube 521 to rotate together, and then through the meshing of the worm tube 521 with the gear 1 524, and the meshing of the gear 1 524 with the gear 2 525, the double-threaded screw 515 is finally driven to rotate. Since the two ring sleeve frames 517 are respectively screwed to the two sections of the double-threaded screw 515, the two ring sleeve frames 517 carry the two acoustic wave probes 4 to move in opposite directions.

[0035] Embodiment three: Refer to the attached Figure 9-12The smearing mechanism 6 includes a long groove rod 601, a through rod 606 and a belt frame 623. A guide plate 602 is fixedly arranged in the middle of the handheld device 1, and the long groove rod 601 and the guide plate 602 are slidably assembled. The two ends of the handheld device 1 are rotatably connected with a pry bar 3 112 arranged parallel to the long groove rod 601. One end of the pry bar 3 112 is connected to the middle part of the corresponding traction rod 107, and the other end of the pry bar 3 112 is connected to the long groove rod 601. The interior of the vertical slot 526 is slidably assembled with a slide plate 603, and the slide The top of the plate 603 is fixedly connected to the extension rod 604, and the top of the extension rod 604 is slidably inserted into the straight groove formed 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 that are separated from each other are integrally provided with a fixed tube 607, and a spring 3 608 is connected between the outer wall of the fixed tube 607 and the outer wall of the guide shell 605. The inner walls of both ends of the handheld device 1 are fixedly provided with a limit rod 621 for limiting the moving range of the fixed tube 607. Refer to the attached Figure 9-12 The fixed tube 607 is internally assembled with an inner shaft 609, the top of the inner shaft 609 is fixedly mounted with a gear 3 610, the bottom of the inner shaft 609 is fixedly mounted with a herringbone rod 611, one end of the surface of the herringbone rod 611 is fixedly provided with a soft brush 612, the other end of the surface of the herringbone rod 611 is arrayed with nozzles 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 to a liquid pipe 615 communicating with the nozzle 613, and one side of the liquid valve 614 is connected to a liquid pipe 615 extending to the bottom of the herringbone rod 611. Liquid pipe 2 616, the internal elastic telescopic assembly of liquid valve 614 is equipped 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 arc surface 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 surface body 618 and the trigger protrusion 620 are squeezed, liquid pipe 1 615 and liquid pipe 2 616 are connected, and the bottom end of liquid pipe 2 616 is sealingly rotatably connected with an injection tube 622.

[0036] Refer to the attached Figure 9-12 Two belt racks 623 are symmetrically fixedly installed at the two ends inside the handheld device 1. A wide sawtooth track 624 meshing with the corresponding gear three 610 is assembled on the inner side of the belt rack 623. An active roller 625 for driving the wide sawtooth track 624 is rotatably assembled on the inner side of the belt rack 623. A dual-axis motor 626 is fixedly installed above the middle position of the two belt racks 623 inside the handheld device 1. 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.

[0037] According to the above structure, in the process of tightly gripping the trigger handle 104, the traction rod 107 will simultaneously pull the pry bar 3 112 to rotate, and the pry bars 3 112 on both sides will then drive the long groove rod 601 to move along the guide plate 602, and the extension rod 604 will then drive the slide plate 603 to move along the vertical groove 526. Finally, the piercing rods 606 on both sides cooperate with the herringbone rod 611 to move a short distance toward the concrete surface, and the herringbone rod 611 will eventually be between the end of the sonic probe 4 and the concrete surface. During the process, the gear 3 610 is always engaged with the wide serrated track 624. When the ring frame 517 carries the sonic probe 4 to move, the piercing rod 606 and the herringbone rod 611 will also move together. At this time, the dual-axis motor 626 will work and drive the wide serrated track 624 to operate, so as to ensure that the herringbone rod 611 will not rotate while moving horizontally. 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 then be placed between the end of the sonic probe 4 and the concrete surface. Before the sonic probe 4 changes its position, the dual-axis motor 626 is first controlled to work, and the inner shaft 609 is driven to rotate by means of the meshing of the wide sawtooth track 624 and the gear three 610. Then, a relative rotation motion occurs between the inner shaft 609 and the fixed tube 607, and the soft brush 612 at one end of the herringbone rod 611 preferentially contacts the end of the sonic probe 4 and After removing impurities from the surface of the acoustic wave probe 4, the nozzle 613 will continue to approach the acoustic wave probe 4. During the rotation, the arcuate body 618 at the top of the valve core rod 617 will be squeezed with the trigger protrusion 620, and the valve core rod 617 will be retracted into the liquid valve 614, while the liquid pipe 1 615 is connected to the liquid pipe 2 616. At this time, the coupling agent introduced by the injection tube 622 will pass through the liquid pipe 2 616 and the liquid pipe 1 615, and finally be sprayed to the surface of the acoustic wave probe 4 by the nozzle 613, thereby completing the work of applying the coupling agent to the surface of the acoustic wave probe 4; When the fixed tube 607 moves to the extreme positions at both ends, the limit rod 621 will resist the fixed tube 607. As the ring frame 517 continues to move, the penetration rod 606 will move relative to the guide shell 605 and squeeze the spring 3 608 at the same time. This process is used to prevent the herringbone rod 611 from extending to the outside of the handheld device 1 and colliding with external objects. The above process provides a coating mechanism 6 that can simultaneously coat the coupling agent for two acoustic wave probes 4, and can automatically complete the coating of the coupling agent without the operator moving the handheld device 1. In addition, before the acoustic wave probe 4 changes position, the herringbone rod 611 will move between the end of the acoustic wave probe 4 and the concrete surface, and will move with the movement of the acoustic wave probe 4 after the coating is completed, so that the coupling agent can be coated once after each fixed-point detection. The overall structure is compact and the space utilization rate is high.

[0038] Refer to Appendix 4 and Fig.13The injection mechanism 7 includes a coupling agent liquid tank 701 and a connecting bridge 713 fixedly installed 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. Guide rods 705 are fixedly connected to both ends of the bottom of the coupling agent liquid tank 701, and a hook plate 706 is movably sleeved at the end of the guide rod 705. A rotating arm 704 is fixedly connected to the output end of the second motor 703, and both ends of the rotating arm 704 are connected to the two hook plates 706 through a connecting arm 707. Refer to the attached Fig.13 , syringes 708 are fixedly installed at both ends of the bridge 713, baffles 710 are integrally provided on both sides of the middle of the bridge 713, a piston is telescopically assembled inside the syringe 708, and the end of the piston located outside the syringe 708 is fixedly connected to an end plate 709, 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, 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 injection tube 622, a one-way valve is installed inside the suction tube 712 and the end of the injection tube 622 close to the syringe 708, and the other end of the suction tube 712 is connected to the coupling agent liquid tank 701.

[0039] According to the above structure, under the premise of preparation for the detection work, the control motor 2 703 works and rotates the rotating arm 704, and the rotating arm 704 drives the two hook plates 706 to move toward each other along the guide rod 705 through the connecting arm 707. At this time, the end plates 709 at both ends will move toward each other together with the piston member and squeeze the corresponding spring 4 711, and suction will be generated in the syringe 708, which can suck the coupling agent in the coupling agent liquid tank 701 into itself through the suction tube 712. After the hook plate 706 is reset, the elastic force of the spring 4 711 in the compressed state keeps a certain injection hydraulic pressure in the injection tube 622, so that when the liquid tube 1 615 and the liquid tube 2 616 are connected, the coupling agent can be quickly sprayed to the surface of the acoustic wave probe 4 through the nozzle 613; the above process provides an injection mechanism 7 for providing power for injecting the coupling agent, which can realize multiple coupling agent injection processes when the liquid tube 1 615 and the liquid tube 2 616 are connected.

[0040] The working principle of the present invention is as follows: under the premise of preparing for the detection work, the control motor 2 703 is operated to rotate the rotating arm 704, and the rotating arm 704 drives the two hook plates 706 to move toward each other along the guide rod 705 through the connecting arm 707. At this time, the end plates 709 at both ends will move toward each other together with the piston member and squeeze the corresponding spring four 711, and suction will be generated in the syringe 708. The coupling agent in the coupling agent liquid tank 701 can be sucked into the interior of the syringe 708 through the suction tube 712. After the hook plate 706 is reset, the elastic force of the spring four 711 in the compressed state keeps a certain injection hydraulic pressure in the coupling agent inside the injection tube 622, so that when the liquid tube 1 615 is connected to the liquid tube 2 616, the coupling agent can be quickly sprayed to the surface of the acoustic wave probe 4 through the nozzle 613.

[0041] like Figure 14-15 As shown, a railway bridge and tunnel concrete crack detection method based on cloud computing, the specific steps are as follows: S1: Use the handheld device 1 to control two acoustic wave probes 4 to perform depth detection of concrete cracks at the locations 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 squeezing the trigger handle 104 is the trigger operation for each distance adjustment; S3: When the sonic probe 4 detects the crack depth early, the equal distance adjustment ends immediately; S4: Upload 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.

[0042] The working principle of the present invention is as follows: the above-mentioned detection method can timely terminate the position adjustment work of the acoustic probe 4 when the crack depth has been measured, which is in line with 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 depth information of each crack, and deduces the formation of the crack. Then, other detection data information is accessed between different devices, and the concrete hardness information and size information are integrated to finally analyze the degree of danger of the crack.

[0043] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

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 an 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 a 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 the 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 at both ends of the surface of the handheld device (1), and an operation panel (102) is integrally arranged on the inner side of the end of the handle (101), and an operation button (103) for performing detection work is arranged 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 away from the concrete surface before changing its position; The coating mechanism (6) comprises a herringbone rod (611). Before the sonic probe (4) changes position, the herringbone rod (611) moves between the end of the sonic probe (4) and the concrete surface to first remove impurities on the surface and then coat the coupling agent.

2. According to the cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 1, it is characterized by: The operation button (103) is electrically connected to the detector (2) by means of a data line connection. The inner side of the handle (101) is rotatably connected to a trigger handle (104). A pressure sensor (105) is fixedly provided on the inner wall of the handle (101). A pressure block (106) is integrally provided on the surface of the trigger handle (104) and close to the pressure sensor (105). A support block (109) is provided on one side of the lower surface of the handheld device (1) and close to the display screen (3). 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 support block (109) is in the same plane as the soft pad (108). The end of the trigger handle (104) away from the transfer point is connected to a traction rod (107), and a pry bar 1 (110) and a pry bar 2 (111) are rotatably mounted at both ends inside the handheld device (1), the bottom end of the traction rod (107) extends into the inside 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).

3. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 2 is characterized by: The distance adjustment mechanism (5) comprises a guide frame (501), guide posts (503) are fixedly arranged on the inner walls of both ends of the handheld device (1), and both ends of the guide frame (501) are movably sleeved on the surface of the guide posts (503), and the surface of the guide posts (503) is sleeved with a spring 1 (504) for resetting the guide frame (501), the other ends of the two pry bars (111) are connected to the two ends of the guide frame (501), 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), and elastic assembly components for mounting a sonic probe (4) are slidably assembled on both sides of the guide frame (501); The elastic assembly comprises a sleeve (505), a second cover (507), an outer ring (510) and a slider (513); the outer wall of the acoustic wave probe (4) is integrally provided with an extension (401); the bottom of the sleeve (505) is integrally provided with a first cover (506); the second cover (507) is detachably assembled below the first cover (506) by means of screws; the interior of the first cover (506) is elastically and movably assembled with a push plate (508) for squeezing the extension (401) by means of a second spring (509) arranged in an array; 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 shell (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 shell (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 a slider (513), and coil springs are provided inside the coil spring shell (511) and the coil spring shell (512), 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: A double-threaded screw (515) is rotatably assembled inside the handheld device (1), and the surfaces of the two sections of the double-threaded screw (515) are both screwed with a ring frame (517). A horizontal guide frame (514) for guiding the movement of the ring frame (517) is symmetrically fixedly arranged inside the handheld device (1) and located on one side of the double-threaded screw (515). A distance measuring plate (516) is fixedly arranged inside the handheld device (1) and located on the other side of the double-threaded screw (515). 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). A vertical groove (526) is opened at the other end of the ring frame (517). A second gear (525) is fixedly sleeved in the middle of the double-threaded screw (515).

5. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 4 is characterized by: 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 and connected to the transmission shaft (520) via a helical gear set. A worm tube (521) is sleeved on the outer surface of the transmission shaft (520), 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 at 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, and 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).

6. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 5 is characterized by: The smearing mechanism (6) comprises a long slot rod (601), a through rod (606) and a belt frame (623); a guide plate (602) is fixedly arranged in the middle of the handheld device (1), and the long slot rod (601) and the guide plate (602) are slidably assembled; two ends of the handheld device (1) are rotatably connected to a pry bar three (112) arranged parallel to the long slot rod (601); one end of the pry bar three (112) is connected to the middle part of the corresponding traction rod (107), and the other end of the pry bar three (112) is connected to the long slot rod (601); a slide plate (603) is slidably assembled inside the vertical slot (526) ), 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 formed 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) facing away from each other are integrally provided with a fixed tube (607), and a spring three (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).

7. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 6 is characterized by: The fixed tube (607) is internally provided with an inner shaft (609) which is rotatably assembled therein, a gear three (610) is fixedly mounted on the top of the inner shaft (609), a herringbone rod (611) is fixedly mounted on the bottom of the inner shaft (609), a soft brush (612) is fixedly mounted on the surface of one end of the herringbone rod (611), and nozzles (613) are arrayed on the surface of the other end of the herringbone rod (611), a liquid valve (614) is fixedly mounted on one side of the bottom of the inner shaft (609), a liquid pipe one (615) which is in communication with the nozzle (613) is connected to the bottom of the liquid valve (614), and a liquid valve (614) which extends to the bottom of the herringbone rod (611) is connected to one side of the liquid valve (614). 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 handheld device (1); a wide sawtooth track (624) meshing with the corresponding gear three (610) is assembled on the inner side of the belt rack (623); an active roller (625) for driving the wide sawtooth track (624) is rotatably assembled on the inner side of the belt rack (623); a dual-axis motor (626) is fixedly installed above the middle position of the two belt racks (623) inside the handheld device (1); and the two ends of the output shaft of the dual-axis motor (626) are meshed and transmission-connected with the two active rollers (625) via a helical gear set.

8. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 7 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 arranged in the middle of the surface of the coupling agent liquid tank (701), and 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 guide rods (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).

9. The cloud computing-based automatic detection device for railway bridge and tunnel concrete cracks according to claim 8, characterized in that: A syringe (708) is fixedly mounted on both ends of the connecting bridge (713), baffles (710) are integrally arranged on both sides of the middle of the connecting bridge (713), a piston is telescopically assembled inside the syringe (708), and one end of the piston located outside the syringe (708) is fixedly connected to an end plate (709), the hook plate (706) is placed on a 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), an 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 injection tube (622), a one-way valve is installed inside the suction tube (712) and the end of the injection tube (622) close to the syringe (708), and the other end of the suction tube (712) is connected to a coupling agent liquid tank (701).

10. A railway bridge and tunnel concrete crack detection method based on cloud computing, 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 locations to be detected; S2: The user uses the thumb to control the operation button (103) to complete the distance adjustment and coupling agent application, wherein squeezing the trigger handle (104) is the trigger operation for each distance adjustment; S3: When the sonic probe (4) detects the crack depth at an early stage, the equal distance adjustment is immediately terminated; S4: Upload 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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