A structure damage detection device based on resonance method

Abstract

The utility model belongs to ancient building protection technical field discloses a kind of structural damage detection devices based on resonance method, including holding lever, the inside of holding lever top end is fixedly connected with electric push rod, the top of electric push rod is fixedly connected with mounting bracket, the inside of mounting bracket top end is provided with detection assembly, the center position of detection assembly front end is equipped with exciter.The utility model is provided with square groove on the left and right sides of detection assembly, when detection assembly is placed in the center position of mounting bracket, by the connecting piece of left and right sides in mounting bracket inside is inserted square groove on detection assembly, then the quick installation of detection assembly on mounting bracket can be completed, when pulling the pull handle of mounting bracket bottom end, the pull handle can be driven plug rod from the first positioning hole on screw disc by movable block, at this time, by rotating member driving screw disc rotates in screw groove, then screw disc can drive connecting piece from square groove on detection assembly, at this time, the dismounting work of detection assembly can be carried out quickly.

Description

Technical Field

[0001] This utility model relates to the field of ancient building protection technology, specifically a structural damage detection device based on the resonance method. Background Technology

[0002] Ancient pagodas, as important historical and cultural heritage sites, carry rich cultural connotations and historical value. Over time, their structural safety faces challenges due to various factors, including the natural environment and human activities. This project, which involves structural exploration and stability assessment of ancient pagodas, aims to comprehensively understand the current state of the pagodas, evaluate their structural stability, and provide a scientific basis for subsequent protection, restoration, and management, ensuring the safety and preservation of these ancient pagodas.

[0003] Current methods for detecting damage to ancient building structures mainly rely on traditional methods that are highly subjective and destructive, or modern non-destructive testing techniques that focus on geometric and apparent defects. These methods are not sensitive to the early decay of the overall structural stiffness. Therefore, resonance-based detection technology has emerged. It assesses the overall mechanical performance of a structure by analyzing changes in the structure's vibration "fingerprint," providing an effective way to achieve rapid and non-destructive structural health diagnosis.

[0004] However, structural damage detection devices have limited functionality and fixed locations, making them inconvenient for rapid inspection and maintenance. This affects the accuracy and stability of subsequent use, thus impacting the overall practicality of the ancient building structural damage detection device. Utility Model Content

[0005] The purpose of this invention is to provide a structural damage detection device based on the resonance method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a structural damage detection device based on the resonance method, comprising a grip, an electric push rod fixedly connected to the inside of the top end of the grip, a mounting frame fixedly connected to the top end of the electric push rod, a detection component disposed inside the top end of the mounting frame, an exciter mounted at the center of the front end of the detection component, a sensor array fixedly connected to the front end of the detection component, and extension rods disposed around the bottom end of the grip. The device also includes a positioning mechanism and an assembly mechanism. The positioning mechanism is used to fix the position of the detection component within the mounting frame, and the assembly mechanism is used to install the extension rods on the grip.

[0007] Preferably, the left and right sides of the upper surface of the detection component are fixedly connected to each other with a hanging lug.

[0008] Preferably, the positioning mechanism includes square slots opened opposite each other on the left and right sides of the detection component, threaded slots opened inside the left and right sides of the mounting bracket, a rotating component rotatably connected to the outer side of the threaded slot, a threaded disc fixedly connected to the inner side of the rotating component, the outer side of the threaded disc being threadedly connected to the threaded slot, a connecting component rotatably connected to the inner side of the threaded disc, the outer side of the connecting component being inserted into the square slot, a first positioning hole opened at the center of the bottom end of the threaded disc, a handle slidably connected to the bottom end of the mounting bracket, movable blocks fixedly connected to the left and right sides of the top end of the handle, a rod fixedly connected to the bottom end of the movable block, and a rod that is inserted into the threaded disc fixedly connected to the top end of the movable block.

[0009] Preferably, the connector and the square groove are of the same specification, both being square, and a slot for the electric push rod to pass through is provided at the center of the bottom of the handle.

[0010] Preferably, the assembly mechanism includes a first slot at the outer bottom edge of the grip, a second slot at the inner bottom edge of the grip, a plug block that engages with the second slot fixed to the top of the extension rod, a second positioning hole inside the plug block, a first gear rotatably connected to the center of the front end of the grip, a second gear meshing with the rear end of the first gear, a first rotating rod coaxially fixed to the bottom end of the second gear, a threaded post fixed to the bottom end of the first rotating rod, a threaded seat threadedly connected to the outside of the threaded post, a second rotating rod fixed to the center of the bottom end of the threaded post, a pull rope fixed to the outer bottom edge of the second rotating rod, a movable plate fixed to the outside of the pull rope, springs fixed to the center of the movable plates on the left, right, front, and rear sides, a first positioning rod that engages with the second positioning hole fixed to the outside of the movable plate, and a second positioning rod fixed to the outer edge of the threaded seat.

[0011] Preferably, the inner sides of the first slot and the second slot are interconnected, and a slot for the second rotating rod to pass through is provided at the center of the bottom of the threaded seat. The position of the second positioning rod corresponds to the position of the first slot. Limiting sliders are fixed to the left and right sides of the outside of the threaded seat, and the limiting sliders slide vertically in the slots opened inside the grip.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This structural damage detection device based on the resonance method has square slots on both sides of the detection component. When the detection component is placed in the center of the mounting frame, the connecting parts on the left and right sides of the mounting frame are inserted into the square slots on the detection component, which allows for quick installation of the detection component on the mounting frame. When the handle at the bottom of the mounting frame is pulled, the handle can drive the insertion rod to be pulled out from the first positioning hole on the threaded disc through the movable block. At this time, the threaded disc is driven to rotate in the threaded slot through the rotating part, and the threaded disc can drive the connecting parts to be pulled out from the square slots on the detection component. At this time, the detection component can be quickly disassembled. The operation is simple, the modular design improves the convenience of inspection and maintenance of the detection device and the stability of long-term use. 2. This structural damage detection device based on the resonance method has a first slot and a second slot respectively set at the bottom of the handle. When the plug on the extension rod is inserted into the second slot and the first positioning rod inside the handle is inserted into the second positioning hole on the plug, the positions of the four extension rods at the bottom of the handle can be fixed. At this time, the extension rod can be used as an extension rod of the handle. When the plug on the extension rod is inserted into the first slot on the handle, the second positioning rod inside the handle can be inserted into the second positioning hole on the plug, and the extension rod can be used as a support frame for the handle. When the first gear on the first gear is rotated, the first gear can drive the second gear to rotate. At this time, the second gear drives the first rotating rod and the threaded column to rotate. The rotation of the threaded column in the threaded seat can cause the threaded seat to drive the second positioning rod to be retracted into the handle. At the same time, the threaded column pulls the pull rope through the second rotating rod, which can cause the pull rope to drive the first positioning rod to be retracted into the handle through the movable plate. This eliminates the limitation operation of the extension rod in various situations and improves the overall flexibility and convenience of the detection device. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is an enlarged structural schematic diagram of the cutting device of this utility model; Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 This utility model Figure 2Enlarged structural diagram at point B.

[0015] In the diagram: 1. Handle; 101. Electric push rod; 102. First slot; 103. Second slot; 2. Mounting bracket; 3. Detection assembly; 301. Vibrator; 302. Sensor array; 303. Hanging lug; 304. Square slot; 4. Threaded groove; 401. Rotating component; 402. Threaded disc; 403. Connector; 404. First positioning hole; 5. Pull handle; 501. Movable block; 502. Spring; 503. Insert rod; 6. Extension rod; 601. Insert block; 602. Second positioning hole; 7. First gear; 701. Second gear; 702. First rotating rod; 703. Threaded column; 704. Threaded seat; 705. Second rotating rod; 706. Pull rope; 707. Movable plate; 708. Spring; 709. First positioning rod; 710. Limiting slider; 711. Second positioning rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-5 As shown, this utility model has the following two specific embodiments.

[0018] Example 1 A structural damage detection device based on the resonance method includes a handle 1, an electric push rod 101 fixedly connected to the top of the handle 1, a mounting frame 2 fixedly connected to the top of the electric push rod 101, a detection component 3 disposed inside the top of the mounting frame 2, an exciter 301 installed at the center of the front end of the detection component 3, a sensor array 302 fixedly connected to the front end of the detection component 3, and extension rods 6 disposed around the bottom of the handle 1. The device also includes a positioning mechanism for fixing the position of the detection component 3 within the mounting frame 2. The exciter 301 approaches the outer surface of the ancient building and applies micro-vibrations to the ancient building structure. The sensor array 302 collects the vibration response. When damage occurs to the ancient building, its stiffness changes, thereby altering its inherent vibration characteristics such as natural frequency and mode shape. By analyzing these vibration changes, the location of the damage and its severity can be accurately located without damaging the ancient building structure. This device is particularly suitable for structural health monitoring of precious buildings such as ancient pagodas.

[0019] The left and right sides of the upper surface of the detection component 3 are fixedly connected to the hanging ears 303. The hanging ears 303 at the top of the detection component 3 facilitate the use of the detection component 3 for suspension by a drone after the detection component 3 is disassembled.

[0020] The positioning mechanism includes square slots 304 on the left and right sides of the detection component 3, and threaded slots 4 on the inside of the left and right sides of the mounting bracket 2. A rotating component 401 is rotatably connected to the outer side of the threaded slots 4, and a threaded disc 402 is fixedly connected to the inner side of the rotating component 401. The outer side of the threaded disc 402 is threadedly connected to the threaded slots 4, and a connecting component 403 is rotatably connected to the inner side of the threaded disc 402. The outer side of the connecting component 403 is inserted into the square slots 304. A first positioning hole 404 is provided at the center of the bottom end of the threaded disc 402. A handle 5 is slidably connected to the bottom end of the mounting bracket 2. Movable blocks 501 are fixedly connected to the left and right sides of the top of the handle 5, and 502 is fixedly connected to the bottom end of the movable blocks 501. The top of the movable block 501 is fixed with a plug rod 503 that engages with the threaded disc 402. When the connector 403 on the mounting bracket 2 is inserted into the square slot 304 on the detection component 3, the installation of the detection component 3 in the mounting bracket 2 can be completed. When the handle 5 is pulled, the handle 5 can squeeze 502 through the movable block 501. At this time, the movable block 501 drives the plug rod 503 to be pulled out from the first positioning hole 404 on the threaded disc 402. Then, the rotating part 401 can drive the threaded disc 402 to rotate in the threaded slot 4. The threaded disc 402 can then drive the connector 403 to be pulled out from the square slot 304 on the detection component 3, thereby completing the disassembly of the detection component 3 in the mounting bracket 2.

[0021] The connector 403 and the square groove 304 have the same specifications, both being square. The center of the bottom of the handle 5 has a slot through which the electric push rod 101 passes.

[0022] Example 2 The difference from Embodiment 1 is that this embodiment discloses an assembly mechanism for mounting the extension rod 6 on the grip rod 1: The assembly mechanism includes a first slot 102 located around the bottom outer edge of the grip 1, a second slot 103 located around the bottom inner edge of the grip 1, a plug 601 fixedly connected to the top of the extension rod 6 to engage with the second slot 103, a second positioning hole 602 located inside the plug 601, a first gear 7 rotatably connected to the center of the front end of the grip 1, a second gear 701 meshing with the rear end of the first gear 7, a first rotating rod 702 coaxially fixedly connected to the bottom end of the second gear 701, a threaded post 703 fixedly connected to the bottom end of the first rotating rod 702, a threaded seat 704 threadedly connected to the outside of the threaded post 703, a second rotating rod 705 fixedly connected to the center of the bottom end of the threaded post 703, a pull rope 706 fixedly connected around the bottom outer edge of the second rotating rod 705, and a movable plate 70 fixedly connected to the outside of the pull rope 706. 7. Springs 708 are fixedly connected to the center of the movable plates 707 on the left and right sides and the front and rear sides. A first positioning rod 709 that engages with the second positioning hole 602 is fixedly connected to the outer side of the movable plate 707. A second positioning rod 711 is fixedly connected to the periphery of the bottom of the threaded seat 704. When the first gear 7 pushes the second gear 701 to rotate, the second gear 701 can synchronously drive the first rotating rod 702, the threaded column 703, and the second rotating rod 705 to rotate. At this time, the threaded column 703 rotates in the threaded seat 704, which can drive the threaded seat 704 to move up and down, and cause the threaded seat 704 to drive the second positioning rod 711 to move up and down. When the second rotating rod 705 drives the pull rope 706 to rewind, the pull rope 706 pulls the movable plate 707 to move, which can cause the movable plate 707 to drive the first positioning rod 709 to retract into the grip 1.

[0023] The inner sides of the first slot 102 and the second slot 103 are interconnected. A slot for the second rotating rod 705 to pass through is provided at the center of the bottom of the threaded seat 704. The position of the second positioning rod 711 corresponds to the position of the first slot 102. Limiting sliders 710 are fixedly connected to the left and right sides of the outside of the threaded seat 704. The limiting sliders 710 slide vertically in the slots opened inside the grip rod 1. Meanwhile, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0024] In this embodiment, the following steps are taken: The electric push rod 101 inside the top of the handle 1 is activated, which lifts the mounting frame 2 and the detection component 3, moving the detection component 3 to a suitable detection height. At this point, the vibrator 301 at the front end of the detection component 3 is brought close to the outer surface of the ancient building to be detected. The vibrator 301 applies a small amplitude vibration to the ancient building structure, and the sensor array 302 collects its vibration response. When the ancient building is damaged, its stiffness changes, thus altering its inherent vibration characteristics such as natural frequency and mode shape. By analyzing these vibration changes, the location of the damage and its severity can be accurately located without damaging the ancient building structure. This is particularly suitable for structural health monitoring of precious buildings such as ancient pagodas. Simultaneously, the first gear 7 drives the second gear 701 to rotate, which in turn drives the first rotating rod 702 and the threaded column 703. When the second rotating rod 705 rotates, the threaded column 703 rotates inside the threaded seat 704, which can drive the threaded seat 704 to move up and down, and cause the threaded seat 704 to drive the second positioning rod 711 to move up and down. When the second rotating rod 705 drives the pull rope 706 to wind up, the pull rope 706 pulls the movable plate 707 to move, which can cause the movable plate 707 to drive the first positioning rod 709 to be retracted into the grip 1. When the first positioning rod 709 is pulled out from the second positioning hole 602 on the top insert block 601 of the extension rod 6, the four sets of extension rods 6 can be removed from the bottom of the grip 1. At this time, the insert block 601 on the extension rod 6 is inserted into the first slot 102 on the grip 1, and the first gear 7 rotates in the opposite direction, so that the second positioning rod 711 is inserted into the second positioning hole 602 on the insert block 601. Then the four insert blocks 601 can be fixed around the bottom of the grip 1, providing fixed support for the detection device.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A structural damage detection device based on the resonance method, comprising a handle (1), characterized in that: An electric push rod (101) is fixedly connected to the inside of the top end of the grip (1). A mounting bracket (2) is fixedly connected to the top end of the electric push rod (101). A detection component (3) is provided inside the top end of the mounting bracket (2). An exciter (301) is installed at the center of the front end of the detection component (3). A sensor array (302) is fixedly connected to the front end of the detection component (3). An extension rod (6) is provided around the bottom end of the grip (1). The grip also includes a positioning mechanism and an assembly mechanism. The positioning mechanism is used to fix the position of the detection component (3) in the mounting bracket (2). The assembly mechanism is used to install the extension rod (6) on the grip (1).

2. The structural damage detection device based on the resonance method according to claim 1, characterized in that: The detection component (3) has lugs (303) fixedly attached to the left and right sides of its upper surface.

3. The structural damage detection device based on the resonance method according to claim 1, characterized in that: The positioning mechanism includes square slots (304) on the left and right sides of the detection component (3), and threaded slots (4) on the left and right sides of the mounting bracket (2). A rotating part (401) is rotatably connected to the outside of the threaded slot (4). A threaded disc (402) is fixedly connected to the inside of the rotating part (401). The outside of the threaded disc (402) is threadedly connected to the threaded slot (4). A connector (403) is rotatably connected to the inside of the threaded disc (402). The outside of the connector (403) is inserted into the square slot (304). A first positioning hole (404) is opened at the center of the bottom end of the threaded disc (402). A handle (5) is slidably connected to the bottom end of the mounting bracket (2). Movable blocks (501) are fixedly connected to the left and right sides of the top of the handle (5). A (502) is fixedly connected to the bottom end of the movable block (501). A plug rod (503) that is inserted into the threaded disc (402) is fixedly connected to the top of the movable block (501).

4. The structural damage detection device based on the resonance method according to claim 3, characterized in that: The connector (403) and the square groove (304) are the same size, both being square. The center of the bottom of the handle (5) is provided with a slot through which the electric push rod (101) passes.

5. A structural damage detection device based on the resonance method according to claim 1, characterized in that: The assembly mechanism includes a first slot (102) located around the bottom outer edge of the grip (1), a second slot (103) located around the bottom inner edge of the grip (1), a plug (601) fixedly connected to the top of the extension rod (6) and engaging with the second slot (103), a second positioning hole (602) located inside the plug (601), a first gear (7) rotatably connected to the center of the front end of the grip (1), a second gear (701) meshing with the rear end of the first gear (7), a first rotating rod (702) coaxially fixedly connected to the bottom end of the second gear (701), and a screw fixedly connected to the bottom end of the first rotating rod (702). The threaded column (703) has a threaded seat (704) connected to its external thread. A second rotating rod (705) is fixed to the center of the bottom end of the threaded column (703). A pull rope (706) is fixed to the periphery of the bottom end of the second rotating rod (705). A movable plate (707) is fixed to the outside of the pull rope (706). A spring (708) is fixed to the center of the movable plates (707) on the left, right and front and rear sides. A first positioning rod (709) that engages with the second positioning hole (602) is fixed to the outside of the movable plate (707). A second positioning rod (711) is fixed to the periphery of the bottom end of the threaded seat (704).

6. A structural damage detection device based on the resonance method according to claim 5, characterized in that: The inner sides of the first slot (102) and the second slot (103) are connected to each other. The center of the bottom of the threaded seat (704) is provided with a slot for the second rotating rod (705) to pass through. The position of the second positioning rod (711) corresponds to the position of the first slot (102). The left and right sides of the threaded seat (704) are fixed with limiting sliders (710). The limiting sliders (710) slide vertically in the slot opened inside the handle (1).

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