A device for detecting defects in concrete structures

Abstract

The application discloses a device for detecting concrete structure defects, comprising a control body, a control lever, a detection probe, a walking mechanism and a linkage protection mechanism; the control body has an avoiding through hole penetrating along the height direction of the control body; the control lever is slidably arranged in the avoiding through hole, and both ends of the control lever extend to the outside of the control body; the detection probe is electrically connected with the control body and is installed at the second end of the control lever; the walking mechanism is arranged at the bottom of the control body; the linkage protection mechanism is arranged on the control body and comprises an operating piece, a transmission assembly, a first limiting part and a second limiting part; the operating piece is connected with the first limiting part and the second limiting part through the transmission assembly; the operating piece is movably arranged on the control body and switches the linkage protection mechanism between the first state and the second state through movement. The scheme solves the problem of insufficient protection reliability of the detection probe of the device for detecting concrete structure defects.

Description

Technical Field

[0001] This invention relates to the field of concrete structure inspection technology, and in particular to a device for detecting defects in concrete structures. Background Technology

[0002] In the field of building engineering quality inspection and structural safety assessment, devices for detecting defects in concrete structures are key equipment for ensuring the service performance of infrastructure. Using non-destructive testing technologies such as ultrasound, radar, or impact echo, these devices accurately identify hidden defects within the concrete, such as cracks, voids, spalling, and steel reinforcement corrosion. This provides a scientific basis for structural reinforcement, maintenance decisions, and lifespan prediction, and is of great significance for preventing engineering accidents and extending the service life of facilities.

[0003] However, existing devices for detecting defects in concrete structures generally suffer from insufficient reliability in protecting the detection probes. The probes lack stable constraints during non-operational periods, making them susceptible to displacement or collisions due to external forces, which can damage precision sensing elements. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a device for detecting defects in concrete structures, which solves the problem of insufficient protection reliability of the detection probe in existing devices for detecting defects in concrete structures.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A device for detecting defects in concrete structures includes: a control body, a control lever, a detection probe, a walking mechanism, and a linkage protection mechanism;

[0007] The control body has a clearance through hole that extends along its own height direction;

[0008] The control lever is slidably inserted through the clearance hole, and both ends of the control lever extend to the outside of the control body, wherein the end near the top of the control body is the first end and the end near the bottom of the control body is the second end;

[0009] The detection probe is electrically connected to the control body and installed at the second end for detecting defects in concrete structures.

[0010] The walking mechanism is located at the bottom of the control body;

[0011] The linkage protection mechanism is located on the control body and includes an operating component, a transmission assembly, a first limiting part, and a second limiting part; the operating component is linked to the first limiting part and the second limiting part respectively through the transmission assembly; the operating component is movably located on the control body and the linkage protection mechanism can be switched between a first state and a second state by the movement.

[0012] When the linkage protection mechanism is in the first state, the operating member is close to the first end, the first limiting part is located above the first end and is used to prevent external force from driving the first end to move downward, thereby preventing the control lever from moving downward, and the second limiting part is located below the second end and is used to block external foreign objects from impacting the detection probe.

[0013] When the linkage protection mechanism is in the second state, the operating member approaches the second end, and both the first limiting part and the second limiting part move outside the sliding path of the control rod, so that the detection probe can follow the second end to approach the concrete surface for detection.

[0014] Further, the transmission assembly includes a fixed shaft, a sliding shaft, two first connecting rods, and two second connecting rods; the fixed shaft is fixedly mounted on the control body, the sliding shaft is slidably mounted on the control body, and the operating element is connected to the sliding shaft to drive the sliding shaft to slide; the two first connecting rods are symmetrically arranged about the sliding shaft, one end of each first connecting rod is a first linkage end and the other end is a first hinge end, the sliding shaft is located between the first linkage end and the first hinge end, and each first connecting rod is hinged through the sliding shaft; the two second connecting rods are symmetrically arranged about the fixed shaft, one end of each second connecting rod is a second linkage end and the other end is a second hinge end, the fixed shaft is located between the second linkage end and the second hinge end, and each second connecting rod is hinged through the fixed shaft; each first hinge end is rotatably connected to the corresponding second hinge end; the first limiting portion is respectively provided on the two first linkage ends, and the second limiting portion is respectively provided on the two second linkage ends;

[0015] When the linkage protection mechanism is in the first state, the sliding shaft is close to the fixed shaft, and the two first linkage ends are close to each other so that the first limiting part forms a limiting fit with the first end; the two second linkage ends are close to each other so that the second limiting part can block external foreign objects from impacting the detection probe.

[0016] When the linkage protection mechanism is in the second state, the sliding shaft moves away from the fixed shaft, and the two first linkage ends move away from each other, so that the first limiting part moves out of the sliding path of the control lever; the two second linkage ends move away from each other, so that the second limiting part moves out of the movement path of the second end.

[0017] Furthermore, the control body is provided with a guide portion extending along the axial direction of the control lever, and the sliding shaft is slidably engaged with the guide portion.

[0018] Furthermore, the transmission assembly is provided in two sets, and the two sets of transmission assemblies are arranged opposite each other on both sides of the control lever in a horizontal direction perpendicular to the axis of the control lever.

[0019] Furthermore, an apparatus for detecting defects in concrete structures also includes two first linkages and two second linkages. The first linkage ends of the corresponding first connecting rods in the two sets of transmission assemblies are respectively connected by a first linkage. The second linkage ends of the corresponding second connecting rods in the two sets of transmission assemblies are respectively connected by a second linkage.

[0020] Furthermore, the first limiting part includes two limiting plates, which are respectively disposed on the two first linkage members; the second limiting part includes two limiting cavities, which are respectively disposed on the two second linkage members;

[0021] When the linkage protection mechanism is in the first state, the two first linkage components move closer to each other so that the two limiting plates merge above the first end to form a limiting stop surface; the two second linkage components move closer to each other so that the two limiting cavities together enclose below the second end to form a limiting isolation cavity, and the detection probe is housed in the limiting isolation cavity;

[0022] When the linkage protection mechanism is in the second state, the two first linkage members move away from each other so that the two limiting plates separate and move out of the sliding path of the control lever; the two second linkage members move away from each other so that the two limiting cavities separate and move out of the movement path of the second end.

[0023] Furthermore, the linkage protection mechanism also includes a locking structure, which is used to lock the operating component to the control body when the linkage protection mechanism is in the first state or the second state.

[0024] Furthermore, an apparatus for detecting defects in concrete structures also includes a cleaning mechanism, which is fixedly mounted above the control lever and used to clean the detection probe when the control lever is moved downward.

[0025] Furthermore, the walking mechanism includes multiple casters, each of which is equipped with a braking mechanism.

[0026] Furthermore, the outer wall of the control unit is provided with a push-pull handle.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. When the linkage protection mechanism is in the first state, the second limiting part is located below the second end and is used to block external foreign objects from impacting the detection probe. Therefore, it can physically shield the detection probe in non-detection conditions, reduce the direct damage to the sensitive elements of the probe by concrete debris, dust and accidental collisions, and improve the problem of insufficient protection reliability of the detection probe in existing devices for detecting defects in concrete structures.

[0029] 2. When the linkage protection mechanism is in the first state, the operating member is close to the first end, the first limiting part is located above the first end and is used to prevent the external force from driving the first end to move downward, thereby preventing the control lever from moving downward. Therefore, the axial constraint of the top of the control lever by the first limiting part reduces the risk of the control lever accidentally sliding down and squeezing the detection probe due to accidental touch, vibration or its own weight, and improves the structural stability in the protection state.

[0030] 3. When the linkage protection mechanism is in the second state, the operating member is close to the second end, and both the first limiting part and the second limiting part move outside the sliding path of the control rod, so that the detection probe can follow the second end to approach the concrete surface for detection. Therefore, the limiting part avoids the movement space of the control rod under the detection condition, reduces interference with the downward stroke of the control rod, and avoids occupying the contact space between the probe and the concrete surface, which is conducive to ensuring the integrity of the detection signal acquisition.

[0031] 4. Since both the first limiting part and the second limiting part have moved outside the sliding path of the control lever, and the operating component is linked to the first limiting part and the second limiting part through the transmission assembly, the control lever limit can be released and the probe obstruction can be removed simultaneously by a single operation. There is no need to manually adjust multiple independent components separately. While ensuring the certainty of the transition between the protection state and the detection state, the risk of equipment damage caused by human error is reduced, thus balancing protection safety and on-site operation efficiency.

[0032] 5. Based on the fact that the operating component is linked to the first limiting part and the second limiting part respectively through the transmission component, the linkage protection mechanism switches between the first state and the second state, and the cooperative protection in the first state and the limiting component give way in the second state, the device adapts to two working conditions of reliable protection and normal detection through the linkage protection mechanism: it provides multiple protections to cope with complex construction site environments when not detecting, and releases the operating space to ensure data accuracy when detecting. To a certain extent, it balances the contradiction between protection reliability and detection functionality, so that the device can adapt to harsh construction environments and minimize the impact on core detection performance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a device for detecting defects in concrete structures according to the present invention.

[0034] Figure 2 for Figure 1 A three-dimensional view;

[0035] Figure 3 for Figure 1 A cross-sectional view.

[0036] In the diagram: 1. Control body; 11. Clearance through hole; 12. Guide part; 13. Push-pull handle; 2. Control lever; 21. Second end; 22. First end; 3. Detection probe; 4. Walking mechanism; 41. Universal wheel; 42. Braking mechanism; 5. Linkage protection mechanism; 51. Operating component; 52. Transmission assembly; 521. Fixed shaft; 522. Sliding shaft; 523. First connecting rod; 5231. First linkage end; 5232. First hinge end; 524. Second connecting rod; 5241. Second linkage end; 5242. Second hinge end; 53. First limiting part; 531. Limiting plate; 54. Second limiting part; 541. Limiting cavity; 55. Locking structure; 56. First linkage component; 57. Second linkage component; 6. Cleaning mechanism; 7. Fixing frame. Detailed Implementation

[0037] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] See Figures 1-3 A preferred embodiment of the present invention provides a device for detecting defects in concrete structures, comprising: a control body 1, a control lever 2, a detection probe 3, a walking mechanism 4, and a linkage protection mechanism 5;

[0041] The control body 1 has a clearance through hole 11 that extends along its own height direction;

[0042] The control lever 2 is slidably inserted through the clearance through hole 11. Both ends of the control lever 2 extend to the outside of the control body 1, wherein the end near the bottom of the control body 1 is the second end 22, and the end near the top of the control body 1 is the first end 21.

[0043] The detection probe 3 is electrically connected to the control body 1 and installed at the second end 22 for detecting defects in concrete structures. Specifically, the detection probe 3 can be a ground-penetrating radar antenna, which uses the reflection characteristics of high-frequency electromagnetic waves in the concrete medium to identify internal voids, cracks, and the distribution of reinforcing bars. It has the advantages of being non-contact and having high scanning efficiency, making it suitable for large-area rapid surveys. Alternatively, it can be an ultrasonic transducer array, which analyzes the depth and density of cracks through multi-channel acoustic transmission or reflection signals. It has high resolution and is sensitive to shallow micro-cracks, making it suitable for quantitative assessment of local fine defects. It can also be an impact echo sensor, which calculates the thickness and defect location by the reflection frequency of transient stress waves at the structural boundary or defect interface. The assessment can be completed by single-sided testing, eliminating the need for double-sided receiving end deployment, which is convenient for on-site confined space operations.

[0044] The walking mechanism 4 is located at the bottom of the control body 1. The walking mechanism 4 can adopt a tracked chassis, which increases the ground contact area and distributes the weight of the whole machine through rubber tracks, thereby improving the passability and stability of the detection device in complex construction sites. Alternatively, it can adopt a magnetic adsorption wheel set, which relies on permanent magnets or electromagnets to adhere to the surface of the steel structure to achieve directional movement, and can move stably along the vertical or inclined surface without additional support.

[0045] The linkage protection mechanism 5 is located on the control body 1 and includes an operating component 51, a transmission assembly 52, a first limiting part 53, and a second limiting part 54. The operating component 51 is linked to the first limiting part 53 and the second limiting part 54 respectively through the transmission assembly 52. ​​The operating component 51 is movably located on the control body 1 and can switch the linkage protection mechanism 5 between a first state and a second state by moving it. Specifically, the transmission assembly 52 can be a linkage mechanism, which can realize the synchronous drive of the dual limiting components by a single input through geometric constraints. The mechanical structure is simple and reliable, and the risk of asynchronous operation of multiple components can be avoided without additional electrical components. Alternatively, a gear rack and cam groove combination mechanism can be used, which can accurately control the movement timing and stroke of the limiting part and is suitable for occasions with high requirements for the position accuracy of state switching. Alternatively, a flexible transmission assembly 52 of steel wire rope or synchronous belt can be used, which is flexible in layout and occupies little space, making it easy to arrange wiring in a compact area inside the body. The first limiting part 53 and the second limiting part 54 can be made of elastic rubber blocks, which can absorb impact energy through their own deformation when blocking external forces, reducing the risk of rigid damage to the control lever 2 and the detection probe 3, while also having a certain sealing and dustproof effect; or they can be made of telescopic sleeve type protective cover, which can achieve protection and clearance through the nesting and telescopic of multiple sleeves. When folded, the volume is compact and when unfolded, the coverage area is large, which is especially suitable for detection scenarios with large probe size or irregular shape.

[0046] When the linkage protection mechanism 5 is in the first state, the operating member 51 is close to the first end 21, the first limiting part 53 is located above the first end 21 and is used to prevent external force from driving the first end 21 to move downward, thereby preventing the control lever 2 from moving downward, and the second limiting part 54 is located below the second end 22 and is used to block external foreign objects from impacting the detection probe 3.

[0047] When the linkage protection mechanism 5 is in the second state, the operating member 51 approaches the second end 22, and the first limiting part 53 and the second limiting part 54 both move outside the sliding path of the control rod 2, so that the detection probe 3 can follow the second end 22 to approach the concrete surface for detection.

[0048] Before use, this device is typically in its first state to reduce the risk of damage to the detection probe 3 and control lever 2 during handling and storage. At this time, the operating component 51 is close to the first end 21 of the control lever 2, and the first limiting part 53 is located above the first end 21 and is used to limit the downward displacement of the first end 21 by external force, thereby limiting the downward displacement of the control lever 2. Simultaneously, the second limiting part 54 is located below the second end 22 and is used to block external foreign objects from impacting the detection probe 3, thus forming a physical shield for the detection probe 3 and reducing the risk of damage to the precision sensing element due to collision or foreign object intrusion. When arriving at the site of the concrete structure to be inspected and preparing to carry out the inspection, the operator places the control body 1 on the surface of the concrete to be tested using the walking mechanism 4, and then drives the operating component 51 to move towards the second end 22 of the control lever 2, causing the linkage protection mechanism 5 to switch to the second state. During this process, the transmission component 52 drives the first limiting part 53 and the second limiting part 54 to move outside the sliding path of the control lever 2, releasing the restriction on the axial displacement of the control lever 2 and the obstruction of the detection probe 3, allowing the detection probe 3 to follow the second end 22 to approach the concrete surface for detection. After the state switch is completed, the operator applies pressure to the first end 21 of the control lever 2, causing the detection probe 3 to abut against the concrete area to be tested, controlling the machine body 1 to start the detection program and collect signals of internal defects in the concrete. If it is necessary to pause the detection or transfer the work position, the operating component 51 can be reversed to reset the linkage protection mechanism 5 to the first state, thereby restoring the protection of the control lever 2 and the detection probe 3.

[0049] When the linkage protection mechanism 5 is in the first state, the second limiting part 54 is located below the second end 22 and is used to block external foreign objects from impacting the detection probe 3. Therefore, it can physically shield the detection probe 3 in non-detection conditions, reducing direct damage to the sensitive elements of the probe from concrete debris, dust, and accidental collisions. This improves the problem of insufficient protection reliability of the detection probe 3 in existing devices for detecting defects in concrete structures. When the linkage protection mechanism 5 is in the first state, the operating member 51 is close to the first end 21, and the first limiting part 53 is located above the first end 21 and is used to prevent external forces from driving the first end 21 to move downward, thereby preventing the control lever 2 from moving downward. Therefore, the axial constraint of the top of the control lever 2 by the first limiting part 53 reduces the risk of the control lever 2 accidentally sliding down and squeezing the detection probe 3 due to accidental contact, vibration, or its own weight, and improves the structural stability in the protected state. When the linkage protection mechanism 5 is in the second state, the operating member 51 approaches the second end 22, and both the first limiting part 53 and the second limiting part 54 move outside the sliding path of the control lever 2, so that the detection probe 3 can follow the second end 22 to approach the concrete surface for detection. Therefore, the limiting parts avoid the movement space of the control lever 2 during the detection condition, reducing interference with the downward stroke of the control lever 2, and avoiding occupying the contact space between the probe and the concrete surface, which is conducive to ensuring the integrity of the detection signal acquisition. Since both the first limiting part 53 and the second limiting part 54 move outside the sliding path of the control lever 2, and the operating member 51 is linked to the first limiting part 53 and the second limiting part 54 respectively through the transmission assembly 52, the release of the control lever 2 limit and the removal of the probe obstruction can be completed simultaneously by a single operation, without the need to manually adjust multiple independent components. While ensuring the certainty of the transition between the protection state and the detection state, it reduces the risk of equipment damage caused by human error, and balances protection safety and on-site operation efficiency. Based on the fact that the operating component 51 is linked to the first limiting part 53 and the second limiting part 54 respectively through the transmission component 52, the linkage protection mechanism 5 switches between the first state and the second state, and the cooperative protection in the first state and the limiting component give way in the second state, the device adapts to two working conditions of reliable protection and normal detection through the linkage protection mechanism 5: it provides multiple protections to cope with complex construction site environments when not detecting, and releases the operating space to ensure data accuracy when detecting. To a certain extent, it balances the contradiction between protection reliability and detection functionality, so that the device can adapt to harsh construction environments and minimize the impact on detection performance.

[0050] Preferably, in this embodiment, the transmission assembly 52 includes a fixed shaft 521, a sliding shaft 522, two first connecting rods 523, and two second connecting rods 524; the fixed shaft 521 is fixedly mounted on the control body 1, the sliding shaft 522 is slidably mounted on the control body 1, and the operating member 51 is connected to the sliding shaft 522 to drive the sliding shaft 522 to slide; the two first connecting rods 523 are symmetrically arranged about the sliding shaft 522, and one end of each first connecting rod 523 is a first linkage end 5231, and the other end is a second linkage end 524. One end is a first hinge end 5232. The sliding shaft 522 is located between the first linkage end 5231 and the first hinge end 5232. Each first connecting rod 523 is hinged through the sliding shaft 522. Two second connecting rods 524 are symmetrically arranged about the fixed shaft 521. One end of each second connecting rod 524 is a second linkage end 5241, and the other end is a second hinge end 5242. The fixed shaft 521 is located between the second linkage end 5241 and the second hinge end 5242. Each second connecting rod 523 is hinged through the sliding shaft 522. 24 is hinged via the fixed shaft 521; each of the first hinge ends 5232 is rotatably connected to the corresponding second hinge end 5242; the first limiting part 53 is respectively provided on the two first linkage ends 5231, and the second limiting part 54 is respectively provided on the two second linkage ends 5241; when the linkage protection mechanism 5 is in the first state, the sliding shaft 522 is close to the fixed shaft 521, and the two first linkage ends 5231 are close to each other, so that the first limiting part 53 forms a limiting fit on the first end 21; the two second linkage ends 5241 are close to each other, so that the second limiting part 54 can block external foreign objects from impacting the detection probe 3; when the linkage protection mechanism 5 is in the second state, the sliding shaft 522 is away from the fixed shaft 521, and the two first linkage ends 5231 are away from each other, so that the first limiting part 53 moves out of the sliding path of the control lever 2; the two second linkage ends 5241 are away from each other, so that the second limiting part 54 moves out of the movement path of the second end 22.

[0051] The fixed shaft 521 is rigidly fixed to the inner wall of the control body 1 as the rotation fulcrum of the first linkage 523. The sliding shaft 522 is translated along a preset trajectory under the drive of the operating member 51, driving the two sets of linkage mechanisms to move synchronously. When the linkage protection mechanism 5 is in the first state, the sliding shaft 522 is close to the fixed shaft 521, and the two first linkage ends 5231 are close to each other so that the first limiting part 53 forms a limiting fit with the first end 21 of the control lever 2, and the two second linkage ends 5241 are close to each other so that the second limiting part 54 blocks the impact of external foreign objects on the detection probe 3. When the linkage protection mechanism 5 is in the second state, the sliding shaft 522 is away from the fixed shaft 521, and the two first linkage ends 5231 are far apart from each other so that the first limiting part 53 moves out of the sliding path of the control lever 2, and the two second linkage ends 5241 are far apart from each other so that the second limiting part 54 moves out of the movement path of the second end 22. The transmission assembly 52 utilizes the geometric constraints of the linkage mechanism to convert the linear displacement of the operating member 51 into the synchronous opening and closing actions of the first limiting part 53 and the second limiting part 54, realizing the linkage control of the dual-protection components from a single input source. This design not only reduces the number of independent drive components and simplifies the overall structure, but also reduces the risk of jamming or malfunction caused by asynchronous actions of multiple components, improving the operational reliability and maintenance convenience of the detection device under complex working conditions.

[0052] Preferably, in this embodiment, the control body 1 is provided with a guide portion 12 extending axially along the control lever 2, and the sliding shaft 522 is slidably engaged with the guide portion 12. The guide portion 12 is an elongated groove or guide rail formed on the side wall or internal support of the control body 1, and its extension direction is parallel to the axial direction of the control lever 2. The end of the sliding shaft 522 is embedded in the guide portion 12 and can only reciprocate along its length. This structure effectively constrains the movement path of the sliding shaft 522, making it less prone to deflection or shaking during the force process, thereby ensuring the certainty and stability of the movement trajectory of the transmission component 52. This design not only improves the repeatability of the position switching between the first limit portion 53 and the second limit portion 54, ensuring the accuracy and reliability of the state transition of the linkage protection mechanism 5, but also reduces abnormal wear and gap accumulation between moving parts, extends the service life of the detection device, and further improves the overall operational stability and durability.

[0053] Preferably, in this embodiment, the transmission assembly 52 is provided in two sets, which are arranged opposite each other on both sides of the control lever 2 in a horizontal direction perpendicular to the axis of the control lever 2. The two sets of transmission assemblies 52 are arranged in a mirror-symmetric manner with the control lever 2 as the center, and are located in the space of the control body 1 on both sides of the control lever 2, and the structural parameters and installation positions of the two sets of transmission assemblies 52 are consistent. This double-sided symmetrical layout makes the forces acting on the control lever 2 and the limiting components tend to be balanced in the horizontal direction, effectively avoiding the eccentric loading or tilting phenomenon of the control lever 2 that may be caused by single-sided drive, and improving the operational stability of the detection device during state switching. At the same time, the symmetrical structure also makes the load distribution of the linkage mechanism on both sides more uniform, reduces the risk of stress concentration on a single-sided transmission assembly 52, and is conducive to improving the load-bearing capacity and fatigue life of the overall mechanism; in addition, the mirror-symmetric design also facilitates the standardized processing and assembly of parts, simplifies the production and maintenance process, and further enhances the manufacturing economy and maintenance convenience of the device.

[0054] Preferably, in this embodiment, the device for detecting defects in concrete structures further includes two first linkage members 56 and two second linkage members 57. The first linkage ends 5231 of the corresponding first connecting rods 523 in the two sets of transmission components 52 are respectively connected by a first linkage member 56; the second linkage ends 5241 of the corresponding second connecting rods 524 in the two sets of transmission components 52 are respectively connected by a second linkage member 57. The first linkage members 56 and the second linkage members 57 are respectively rigid connecting rods or connecting plates that span across both sides of the control lever 2, and their two ends are respectively fixedly connected or hinged to the first linkage end 5231 or the second linkage end 5241 on the same side, thereby coupling the two independent transmission components 52 into an integral motion unit. This structure ensures that the movements of the two transmission components 52 are strictly synchronized, so that the first limiting part 53 and the second limiting part 54 always maintain a symmetrical posture during the opening and closing process, effectively preventing interference between the limiting parts and the control lever 2 or the detection probe 3 due to the difference in stroke on both sides. Meanwhile, the linkage design enhances the overall rigidity of the transmission system, enabling the linkage mechanisms on both sides to work together under external impacts or alternating loads, thus preventing deformation or failure caused by unilateral overload. Furthermore, this coupling design reduces assembly and debugging difficulty; calibration of the dual-side linkage can be achieved simply by adjusting one side's transmission component 52, improving production efficiency and maintenance convenience, and further ensuring the consistency and reliability of the detection device's protection state switching during long-term operation.

[0055] Preferably, in this embodiment, the first limiting part 53 includes two limiting plates 531, which are respectively disposed on the two first linkage members 56; the second limiting part 54 includes two limiting cavities 541, which are respectively disposed on the two second linkage members 57; when the linkage protection mechanism 5 is in the first state, the two first linkage members 56 move closer to each other so that the two limiting plates 531 merge above the first end 21 to form a limiting stop surface; the two second linkage members 57 move closer to each other so that the two limiting cavities 541 together enclose below the second end 22 to form a limiting isolation cavity, and the detection probe 3 is housed in the limiting isolation cavity; when the linkage protection mechanism 5 is in the second state, the two first linkage members 56 move further away from each other so that the two limiting plates 531 separate and move out of the sliding path of the control lever 2; the two second linkage members 57 move further away from each other so that the two limiting cavities 541 separate and move out of the movement path of the second end 22.

[0056] Specifically, the limiting plate 531 is fixedly installed on the side of the first linkage 56 facing the control lever 2, and its shape matches the outer contour of the first end 21 of the control lever 2 to ensure that a continuous blocking surface is formed when closed; the limiting cavity 541 is located on the side of the second linkage 57 facing the detection probe 3, and its inner wall contour matches the shape of the detection probe 3 to achieve all-round protection for the probe. This structure reliably blocks the axial displacement of the control lever 2 by closing the split limiting plate 531, and at the same time forms a closed space to accommodate the detection probe 3 by the engagement of the two limiting cavities 541. In non-detection conditions, it provides effective physical shielding for the probe to prevent damage from dust, moisture and mechanical collisions; while in detection conditions, the limiting plate 531 and the limiting cavity 541 can be completely separated and retreated to a safe area to avoid any obstruction to the probe's contact with the concrete surface, thus balancing protection safety and convenience of detection operation.

[0057] Preferably, in this embodiment, the linkage protection mechanism 5 further includes a locking structure 55, which is used to lock the operating member 51 to the control body 1 when the linkage protection mechanism 5 is in the first state or the second state. The locking structure 55 can be a mechanical locking form such as a spring pin, a buckle, or a threaded fastener, and is set at the interface between the operating member 51 and the control body 1. When the operating member 51 moves to the preset position of the corresponding state, the locking is automatically or manually triggered. This structure can maintain the stability of the position of the operating member 51 when the detection device is subjected to vibration or external force interference, effectively preventing the linkage protection mechanism 5 from drifting under unexpected circumstances, thereby ensuring the reliability of the protection state and the detection state; at the same time, the setting of the locking structure 55 provides the operator with clear feedback on the status, avoiding the risk of misoperation caused by misjudging the position of the mechanism. In addition, by selecting locking elements with adjustable preload or anti-loosening design, it can also adapt to vibration levels and usage frequencies under different working conditions, ensuring the reliability of locking while taking into account the convenience of unlocking operation.

[0058] Preferably, in this embodiment, the device for detecting defects in concrete structures further includes a cleaning mechanism 6. The cleaning mechanism 6 is mounted above the control lever 2 via a fixing frame 7 and is used to clean the detection probe 3 when the control lever 2 moves downward. The cleaning mechanism 6 includes the fixing frame 7 and a brush or spray assembly mounted thereon. The fixing frame 7 is rigidly connected to the upper part of the control lever 2, and the position of the brush or spray head corresponds to the surface of the detection probe 3, so that the detection probe 3 moves relative to the cleaning mechanism 6 during the downward movement of the control lever 2. This structure utilizes the detection feed action of the control lever 2 itself to synchronously complete the cleaning of the probe surface, eliminating the need for an additional independent drive source. This effectively reduces the interference of dust or residue adhering to the probe surface on signal acquisition before each detection. At the same time, this follow-up cleaning design ensures seamless connection between the cleaning process and the detection process, avoiding secondary pollution or operational omissions that may be introduced by manual wiping. In addition, by integrating the cleaning mechanism 6 into the control lever 2 body, not only is the overall structure of the detection device simplified and installation space saved, but the cleaning force and detection pressure are also linked, ensuring the consistency and practicality of the cleaning effect.

[0059] Preferably, in this embodiment, the walking mechanism 4 includes multiple casters 41, each of which is equipped with a braking mechanism 42. The casters 41 can be distributed at the four corners or edges of the bottom of the control body 1, and the braking mechanism 42 is a foot-operated or hand-operated brake device integrated on the caster 41 bracket. This structure enables the detection device to move flexibly in multiple directions to adapt to the transfer requirements of different detection points. At the same time, the braking mechanism 42 can lock the wheel assembly during detection operations, effectively preventing the device from slipping when the control lever 2 is pressed down, thus improving the stability of the detection process. In addition, the uniform layout of the casters 41 optimizes the center of gravity distribution and ground support area of ​​the whole machine, enhancing the anti-overturning ability of the detection device on uneven concrete roads; while the integrated braking design simplifies the operation process, allowing operators to quickly switch between moving and stationary states, which not only improves on-site operation efficiency but also avoids the time loss caused by frequent disassembly and assembly of auxiliary support components, further ensuring the continuity and safety of the detection work.

[0060] Preferably, in this embodiment, the outer wall of the control body 1 is provided with a push-pull handle 13. The push-pull handle 13 can be located at a height convenient for the operator to grip on the top or upper side wall of the control body 1, and its shape conforms to ergonomic design. This structure provides the operator with a fulcrum for applying force, making it easy to push or pull the control body 1 to move on the construction site, effectively reducing the burden of handling and improving the portability and on-site ease of use of the equipment. At the same time, the ergonomic handle shape can fit the curve of the palm, distribute the grip pressure, and reduce hand fatigue when pushing or dragging for a long time. In addition, the installation height of the handle is optimized so that the operator can comfortably apply force in a natural standing posture, avoiding physical strain caused by bending over or excessive arm raising, and further improving the human-machine interaction experience.

[0061] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for detecting defects in concrete structures, characterized in that, include: A control body having a clearance through hole extending along its own height direction; A control lever is slidably inserted through the clearance through hole, and both ends of the control lever extend to the outside of the control body, wherein the end near the top of the control body is the first end and the end near the bottom of the control body is the second end; A detection probe, which is electrically connected to the control body and installed at the second end, is used to detect defects in concrete structures. A walking mechanism is provided at the bottom of the control body; A linkage protection mechanism is provided on the control body and includes an operating component, a transmission assembly, a first limiting part, and a second limiting part; the operating component is linked to the first limiting part and the second limiting part respectively through the transmission assembly; the operating component is movably provided on the control body and the linkage protection mechanism can be switched between a first state and a second state by the movement. When the linkage protection mechanism is in the first state, the operating member is close to the first end, the first limiting part is located above the first end and is used to prevent external force from driving the first end to move downward, thereby preventing the control lever from moving downward, and the second limiting part is located below the second end and is used to block external foreign objects from impacting the detection probe. When the linkage protection mechanism is in the second state, the operating member approaches the second end, and both the first limiting part and the second limiting part move outside the sliding path of the control rod, so that the detection probe can follow the second end to approach the concrete surface for detection.

2. The device for detecting defects in concrete structures according to claim 1, characterized in that, The transmission assembly includes a fixed shaft, a sliding shaft, two first connecting rods, and two second connecting rods. The fixed shaft is fixedly mounted on the control body, and the sliding shaft is slidably mounted on the control body. The operating element is connected to the sliding shaft to drive the sliding shaft to slide. The two first connecting rods are symmetrically arranged about the sliding shaft, with one end of each first connecting rod being a first linkage end and the other end being a first hinge end. The sliding shaft is located between the first linkage end and the first hinge end, and each first connecting rod is hinged through the sliding shaft. The two second connecting rods are symmetrically arranged about the fixed shaft, with one end of each second connecting rod being a second linkage end and the other end being a second hinge end. The fixed shaft is located between the second linkage end and the second hinge end, and each second connecting rod is hinged through the fixed shaft. Each first hinge end is rotatably connected to the corresponding second hinge end. First limiting portions are respectively located at the two first linkage ends, and second limiting portions are respectively located at the two second linkage ends. When the linkage protection mechanism is in the first state, the sliding shaft is close to the fixed shaft, and the two first linkage ends are close to each other so that the first limiting part forms a limiting fit with the first end; the two second linkage ends are close to each other so that the second limiting part can block external foreign objects from impacting the detection probe. When the linkage protection mechanism is in the second state, the sliding shaft moves away from the fixed shaft, and the two first linkage ends move away from each other, so that the first limiting part moves out of the sliding path of the control lever; the two second linkage ends move away from each other, so that the second limiting part moves out of the movement path of the second end.

3. The device for detecting defects in concrete structures according to claim 2, characterized in that, The control body is provided with a guide portion extending axially along the control lever, and the sliding shaft is slidably engaged with the guide portion.

4. The device for detecting defects in concrete structures according to claim 2, characterized in that, The transmission assembly is provided in two sets, and the two sets of transmission assemblies are arranged opposite each other on both sides of the control lever in a horizontal direction perpendicular to the axis of the control lever.

5. The device for detecting defects in concrete structures according to claim 4, characterized in that, An apparatus for detecting defects in concrete structures further includes two first linkages and two second linkages. The first linkage ends of the corresponding first connecting rods in the two sets of transmission assemblies are respectively connected by a first linkage. The second linkage ends of the corresponding second connecting rods in the two sets of transmission assemblies are respectively connected by a second linkage.

6. The device for detecting defects in concrete structures according to claim 5, characterized in that, The first limiting part includes two limiting plates, which are respectively disposed on the two first linkage members; the second limiting part includes two limiting cavities, which are respectively disposed on the two second linkage members; When the linkage protection mechanism is in the first state, the two first linkage components move closer to each other so that the two limiting plates merge above the first end to form a limiting stop surface; the two second linkage components move closer to each other so that the two limiting cavities together enclose below the second end to form a limiting isolation cavity, and the detection probe is housed in the limiting isolation cavity; When the linkage protection mechanism is in the second state, the two first linkage members move away from each other so that the two limiting plates separate and move out of the sliding path of the control lever; the two second linkage members move away from each other so that the two limiting cavities separate and move out of the movement path of the second end.

7. The device for detecting defects in concrete structures according to claim 1, characterized in that, The linkage protection mechanism further includes a locking structure, which is used to lock the operating component to the control body when the linkage protection mechanism is in the first state or the second state.

8. The device for detecting defects in concrete structures according to claim 1, characterized in that, An apparatus for detecting defects in concrete structures further includes a cleaning mechanism, which is fixedly mounted above the control lever and is used to clean the detection probe when the control lever is moved downward.

9. The device for detecting defects in concrete structures according to claim 1, characterized in that, The walking mechanism includes multiple casters, each of which is equipped with a braking mechanism.

10. The device for detecting defects in concrete structures according to claim 1, characterized in that, The outer wall of the control unit is equipped with a push-pull handle.

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