Crack change monitoring device

Abstract

The present invention provides a crack change monitoring device. The crack change monitoring device includes: a box body, the box body has a detection surface, and the detection surface is arranged at a position to be detected; an image sensor, the detection end of the image sensor is arranged toward the detection surface; a crack change monitoring part, which is connected to the image sensor and obtains the width change data of the crack at the position to be detected according to the signal detected by the image sensor; a locking structure, the box body is installed at the position to be detected through the locking structure, and the locking structure includes a locking part, which can expand radially outward or contract inward, when the locking part expands outward, the locking part is in a locking state that locks the box body on the wall surface of the position to be detected; when the locking part contracts inward, the locking part is in an unlocking state that can separate the box body from the wall surface of the position to be detected. The technical solution of the present invention solves the problem that the width change of the crack at different depth positions cannot be detected in real time in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of crack monitoring, and in particular to a crack change monitoring device. Background Art

[0002] For engineering buildings, after the foundation is laid, various forms of cracks will appear in the walls over time due to factors such as uneven foundation settlement, load, earthquake, temperature change, rain erosion, etc. The appearance of cracks will not only affect the integrity and rigidity of the structure, but also cause the corrosion of steel bars, accelerate the carbonization of concrete, reduce the durability and fatigue resistance and penetration resistance of concrete, and affect the bearing capacity and safety of the building. Therefore, it is necessary to monitor the changes in cracks and repair cracks that exceed the specifications in a timely manner.

[0003] The concrete crack limit standards are not completely the same in all countries, but they are roughly the same. For example, from the perspective of structural durability, bearing capacity and normal use, the most stringent permissible crack width is 0.1mm. In recent years, many countries have relaxed it to 0.2mm based on a large number of tests and experience in pumping concrete. When the environment in which the structure is located is normal, the thickness of the protective layer meets the design requirements, and there is no corrosive medium, the crack width of reinforced concrete can be relaxed to 0.4mm; 0.3mm in moisture and soil; 0.15mm in seawater and alternating dry and wet conditions.

[0004] For cracks on the wall, the existing measurement methods mainly include:

[0005] 1) Use a sample ruler marked with sample scale to compare with the crack and determine the size of the crack close to the sample scale;

[0006] 2) A material is attached to the crack. When a light source is used to illuminate the material, the stretched part will reflect light. The length of the reflected light part varies with the stretched length. The crack size is estimated based on the length of the reflected light part.

[0007] 3) A material is attached to the crack, and the stretched part of the material will change color. The length of the discolored part varies with the stretched length. The crack size is estimated based on the length of the discolored part.

[0008] 4) A material is coated on the crack. When the material is irradiated with ultraviolet light, the stretched part will produce fluorescence. The length of the fluorescent part varies with the stretched length. The crack size is estimated based on the length of the fluorescent part.

[0009] 5) CN201810997751 discloses a crack sensor, which is fixed at the crack site. The crack sensor is provided with a first fixing seat and a second fixing seat, which are respectively fixed at both sides of the crack. The two fixing seats of the crack sensor are provided with a first guide rod and a second guide rod, respectively. One guide rod is installed with a main scale, and the other guide rod is installed with a vernier scale. An image acquisition component is installed above the guide rod. When the crack changes, the vernier scale is driven to slide on the main scale, and the vernier scale reading will reflect the change of the crack. The vernier scale reading is collected by the image acquisition component to achieve the purpose of measuring the change size of the crack.

[0010] Since cracked walls need regular inspections and repairs, and the cracks are usually located in dangerous, remote and inconvenient locations such as high-rise buildings, bridges, and tunnel culverts, solutions 1 to 4 require workers to use climbing equipment and climb up and down to perform manual operations, which is extremely wasteful of manpower and material resources, and the measurement accuracy is not high. Solution 5 does not require workers to climb up and down frequently, but the initial installation and subsequent maintenance of the device are still inconvenient. Summary of the invention

[0011] The main purpose of the present invention is to provide a crack change monitoring device to solve the problem that the crack monitoring device in the prior art is inconvenient to install and maintain.

[0012] In order to achieve the above-mentioned purpose, the present invention provides a crack change monitoring device, which includes: a box body, the box body has a detection surface, and the detection surface is arranged in a close contact with the position to be detected; an image sensor, which is located in the box body, and the detection end of the image sensor is arranged toward the detection surface; a crack change monitoring part, which is connected to the image sensor and obtains the width change data of the crack at the position to be detected according to the signal detected by the image sensor; a locking structure, the box body is installed at the position to be detected through the locking structure, the locking structure includes a locking part, the locking part can expand radially outward or contract inward, when the locking part expands outward, the locking part is in a locking state that locks the box body on the wall surface of the position to be detected; when the locking part contracts inward, the locking part is in an unlocking state that can separate the box body from the wall surface of the position to be detected.

[0013] Furthermore, the locking structure also includes a driving member cooperating with the locking portion. Under the action of external force, the driving member is movably arranged relative to the box body or only rotatably arranged relative to the box body to drive the locking portion to switch between a locked state and an unlocked state.

[0014] Further, the driving member is movably arranged relative to the case by pressing the case or operating the driving member.

[0015] Furthermore, when the driving member is driven by pressing the box, a fixing hole is provided on the wall of the position to be detected, and the inner wall surface of the fixing hole abuts against the driving member to switch the locking portion from the unlocked state to the locked state.

[0016] Furthermore, the driving member has a first inclined surface, and the locking portion has a second inclined surface cooperated with the first inclined surface. Under the drive of external force, the first inclined surface cooperates with the second inclined surface to drive the locking portion to expand outward, thereby driving the locking portion to switch from an unlocked state to a locked state.

[0017] Furthermore, the locking structure also includes a locking body, the locking part includes a plurality of claws connected to the locking body, the plurality of claws are arranged along the circumference of the locking body, and when the locking part is in a locking state, the plurality of claws expand outward and abut against the inner wall surface of the fixing hole.

[0018] Furthermore, the crack variation device also includes a connection structure arranged on the box body, the connection structure includes two separately arranged clamping sleeves, and the locking body is clamped and connected to the connection structure.

[0019] Furthermore, when the driving member is driven by operating the driving member, the locking structure further includes a nut connected to the box body, and the driving member is threadedly connected to the nut.

[0020] Furthermore, the locking structure also includes a locking body connected to the locking part, the locking body is provided with a first matching through hole, the driving member includes a driving rod located in the first matching through hole, the driving rod is provided with a protrusion or a rolling body, and the inner wall of the first matching through hole is provided with a groove. When the protrusion or the rolling body slides out of the groove, the locking part is switched from an unlocked state to a locked state under the drive of the protrusion or the rolling body.

[0021] Furthermore, the locking structure also includes a locking body connected to the locking part, a first matching through hole is provided on the locking body, and the locking body also includes a first slide groove and a second slide groove opened on the inner wall surface of the first matching through hole. The driving member includes a driving rod located in the first matching through hole, and a rolling body is provided on the driving rod. When the rolling body slides from the second slide groove into the first slide groove, under the action of external force, the locking part switches from an unlocked state to a locked state.

[0022] Further, the groove depth of the first sliding groove is smaller than the groove depth of the second sliding groove; or the first sliding groove and the second sliding groove both extend along the circumference of the first matching through hole to form an annular groove.

[0023] Furthermore, the driving member also includes a driving end connected to the driving rod, and the driving end has a driving inclined surface. Under the action of external force, the driving inclined surface cooperates with the locking body to drive the locking part to switch from a locked state to an unlocked state.

[0024] Further, when the driving member is driven by operating the driving member, the locking portion is driven to switch between the locked state and the unlocked state by pressing or pulling the driving member.

[0025] Furthermore, the locking structure also includes a locking body connected to the locking part, the locking body is provided with a first matching through hole and a first slide groove and a second slide groove are arranged on the inner wall surface of the first matching through hole, the driving member includes a driving rod located in the first matching through hole, and the driving rod is provided with a rolling body. When the rolling body slides from the second slide groove into the first slide groove, under the action of external force, the locking part switches from an unlocked state to a locked state.

[0026] Furthermore, the groove depth of the first sliding groove is smaller than the groove depth of the second sliding groove.

[0027] Furthermore, the driving member also includes a driving end connected to the driving rod, and the driving end has a driving inclined surface. When the driving rod is pulled upward, the driving inclined surface cooperates with the locking body to drive the locking part to switch from a locked state to an unlocked state. At this time, the rolling body slides from the first slide groove into the second slide groove.

[0028] Furthermore, the crack change monitoring device includes two rolling bodies, and a mounting through hole connected to the first matching through hole is provided on the driving rod of the driving member, and an angle is formed between the axis of the mounting through hole and the axis of the first matching through hole, and at least part of the rolling body is located in the mounting through hole. The crack change monitoring device also includes an elastic member, which is arranged in the mounting through hole and located between the two rolling bodies.

[0029] Further, when the driving member is only rotatably arranged relative to the housing, the locking portion can be driven to switch between the locked state and the unlocked state by rotating the driving member.

[0030] Furthermore, the locking structure also includes a locking body connected to the locking part and a first rolling body. The locking body is provided with a first mating through hole and a first sliding groove opened on the inner wall surface of the first mating through hole. The driving member includes a driving rod located in the first mating through hole. Under the action of the rotational force, the driving rod drives the first rolling body to slide out of the first sliding groove and abut against the inner wall surface of the first mating through hole, thereby driving the locking part to switch to a locking state.

[0031] Furthermore, a second sliding groove is provided on the outer wall surface of the locking body, the locking structure also includes a second rolling body, and the driving member also includes a driving end connected to the driving rod. The second rolling body is located between the driving end and the outer wall surface of the locking body. Under the action of the rotational force, the driving end drives the second rolling body to slide out of the second sliding groove, thereby driving the locking part to switch to an unlocked state.

[0032] Further, when the first rolling body cooperates with the first slide groove and the second rolling body slides out of the second slide groove, the locking part switches from the locked state to the unlocked state; or, when the first rolling body slides out of the first slide groove and the second rolling body cooperates with the second slide groove, the locking part switches from the unlocked state to the locked state.

[0033] Furthermore, the crack change monitoring device includes two first rolling bodies, and a mounting through hole connected to the first matching through hole is provided on the driving rod of the driving member, and an angle is formed between the axis of the mounting through hole and the axis of the first matching through hole, and at least part of the first rolling body is located in the mounting through hole. The crack change monitoring device also includes a first elastic member, which is arranged in the mounting through hole and located between the two first rolling bodies.

[0034] Furthermore, the locking structure also includes a plurality of second rolling bodies, which are arranged at circumferential intervals along the locking body. The crack change monitoring device also includes a plurality of second elastic members arranged corresponding to the plurality of second rolling bodies, and the second elastic members are used to apply a force to the second rolling bodies to make them move toward the locking body.

[0035] Furthermore, the locking structure also includes a locking body, and the locking portion includes a plurality of claws connected to the locking body, and the plurality of claws are arranged along the circumference of the locking body.

[0036] Furthermore, a mounting through hole is provided on the box body, and at least a part of the locking structure is installed in the mounting through hole.

[0037] Furthermore, the crack change monitoring device includes a plurality of locking structures, which are arranged on the surface of the box body facing the position to be detected, and the plurality of locking structures form a triangle.

[0038] Furthermore, the crack change monitoring device also includes a power supply unit located in the box body, and the image sensor and the crack change monitoring unit are both connected to the power supply unit.

[0039] By applying the technical solution of the present invention, a fixing hole is provided on the wall surface of the position to be detected, and the position of the fixing hole must ensure that the crack is within the detection range of the image sensor. A locking structure corresponding to the fixing hole is provided on the crack change monitoring device. The locking structure is used in conjunction with the fixing hole of the wall surface of the position to be detected to achieve the purpose of installing or disassembling the crack change monitoring device on the wall surface of the position to be detected; the locking part of the locking structure expands outwards and contacts with the inner wall surface of the fixing hole to be subjected to force so that the locking part is locked in the fixing hole, and the locking part contracts inwards to release the cooperation with the inner wall surface of the fixing hole to unlock the locking part. That is to say, the locking part can be locked on the wall surface of the position to be detected by radially expanding outwards, or the locking part can be contracted inwards to put the locking part in an unlocked state separated from the wall surface of the position to be detected, thereby achieving the installation or disassembly of the box on the wall surface of the position to be detected. Therefore, this technical solution facilitates the installation and maintenance of the crack change monitoring device; further, the crack change monitoring device is installed on the wall and the detection end of the image sensor is aimed at the crack that needs to be monitored, so that the cracks can be continuously monitored and the change and development process of the cracks can be tracked so that timely repair and protection can be carried out when necessary. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0041] Figure 1a It shows a schematic structural diagram of a first embodiment of a crack change monitoring device according to the present invention;

[0042] Figure 1b A schematic diagram showing the structure of the crack change monitoring device of FIG. 1 in cooperation with a wall surface at a position to be detected;

[0043] Figure 1c A schematic diagram showing the structure of a wall surface at a position to be detected;

[0044] Figure 2a A schematic diagram showing the structure of the locking structure of the crack change monitoring device of FIG. 1 cooperating with the wall surface at the position to be detected (at this time, the locking part is in an unlocked state);

[0045] Figure 2b A schematic diagram showing the structure of the locking structure of the crack change monitoring device of FIG. 1 cooperating with the wall surface at the position to be detected (at this time, the locking part is in a locked state);

[0046] Figure 2c Shows Figure 2a A cross-sectional view of a locking structure;

[0047] Figure 3aA schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the second embodiment of the present invention cooperating with the wall surface at the position to be detected (at this time, the locking part is in an unlocked state);

[0048] Figure 3b A schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the second embodiment of the present invention locked on the wall surface at the position to be detected (at this time, the locking part is in a locked state);

[0049] Figure 3c Shows Figure 3a A schematic cross-sectional view of a locking structure;

[0050] Figure 4a A schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the third embodiment of the present invention cooperating with the wall surface at the position to be detected (at this time, the locking part is in an unlocked state);

[0051] Figure 4b A schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the third embodiment of the present invention locked on the wall surface at the position to be detected (at this time, the locking part is in a locked state);

[0052] Figure 5a A schematic diagram showing the structure of the locking structure of the fourth embodiment of the crack change monitoring device according to the present invention cooperating with the wall surface at the position to be detected (at this time, the locking part is in an unlocked state);

[0053] Figure 5b A schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the fourth embodiment of the present invention locked on the wall surface at the position to be detected (at this time, the locking part is in a locked state);

[0054] Figure 6a A schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the fifth embodiment of the present invention cooperating with the wall surface at the position to be detected (at this time, the locking part is in an unlocked state);

[0055] Figure 6b A schematic diagram showing the structure of the locking structure of the crack change monitoring device according to the fifth embodiment of the present invention locked on the wall surface at the position to be detected (at this time, the locking part is in a locked state);

[0056] Figure 6c Shows Figure 6a A cross-sectional structural schematic diagram of (wherein only the drive rod, the locking portion and the connecting structure are shown);

[0057] Figure 7 Shows Figure 6a A partial enlarged schematic diagram of

[0058] Figure 8 Shows Figure 6a Another partial enlarged schematic diagram of;

[0059] Fig. 9 Shows Figure 6b A partial enlarged schematic diagram of one of the locations;

[0060] Fig.10 Shows Figure 6b Another partial enlarged view of the

[0061] Fig.11 A schematic cross-sectional structure diagram of an image sensor of the crack change monitoring device of FIG. 1 is shown; and

[0062] Fig.12 A schematic diagram of a wall surface at a position to be detected is shown.

[0063] The above drawings include the following reference numerals:

[0064] 10. Image sensor; 11. Photoelectric conversion chip; 12. Circuit board; 13. Optical lens; 14. Light source; 15. Transparent plate; 16. Housing; 20. Crack change monitoring unit; 30. Output device; 31. Wireless control unit; 40. Locking structure; 41. Driving member; 411a. First inclined surface; 411. Protrusion; 412. Driving rod; 4121. First mounting through hole; 413. Driving end; 4131 , driving inclined plane; 414, rolling body; 415, first rolling body; 416, second rolling body; 42, locking part; 421, claw; 43, locking body; 431, first matching through hole; 432, groove; 433, first slide groove; 434, second slide groove; 44, connecting structure; 50, box body; 51, second installation through hole; 60, wall; 61, fixing hole; 70, power supply part; 80, nut; 3, crack. DETAILED DESCRIPTION

[0065] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0066] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0067] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0068] In order to solve the problem that the crack monitoring device in the prior art is inconvenient to install and maintain, the present invention and the embodiments of the present invention provide a crack change monitoring device. The crack change monitoring device is used for collecting crack images, transmitting data, and receiving control signals. In the present invention and the embodiments of the present invention, the installation of the crack change monitoring device is achieved by pressing, rotating, or pushing and pulling the driving member 41. In the present invention and the embodiments of the present invention, the image sensor 10 is preferably a contact image sensor.

[0069] It should be noted that in the present invention and the embodiments of the present invention, the locking portion 42 is made of steel, and under the action of external force, it must be ensured that the locking portion 42 can expand in a direction away from the center of the fixing hole 61 or contract in a direction close to the center of the fixing hole 61. As long as the locking portion 42 can contract inwardly and separate from the hole wall of the fixing hole 61 or expand outwardly and press against the inner wall of the fixing hole 61, the function of installing the crack change monitoring device or removing the crack change monitoring device from the wall 60 can be achieved. However, the present application does not limit the materials of the locking portion 42 and the locking body 43.

[0070] The following is described in combination with different embodiments:

[0071] Embodiment 1

[0072] Specifically, Figure 1a , Figure 1b and Figure 1c As shown, in the first embodiment of the present invention, the crack change monitoring device includes a box 50, an image sensor 10, a crack change monitoring unit 20 and a locking structure 40. The box 50 has a detection surface, which is arranged at the position to be detected; the image sensor 10 is located in the box 50, and the detection end of the image sensor 10 is arranged toward the detection surface; the crack change monitoring unit 20 is connected to the image sensor 10 and obtains the width change data of the crack 3 at the position to be detected according to the signal detected by the image sensor 10; the box 50 is installed at the position to be detected through the locking structure 40, and the locking structure 40 includes a locking unit 42, which can expand radially outward or contract inward. When the locking unit 42 expands outward, the locking unit 42 is in a locking state that locks the box 50 on the wall 60 at the position to be detected; when the locking unit 42 contracts inward, the locking unit 42 is in an unlocking state that can separate the box 50 from the wall 60 at the position to be detected.

[0073] There is a crack 3 on the wall 60 at the position to be detected, and a fixing hole 61 is provided on the wall 60 at the position to be detected. The position of the fixing hole 61 should ensure that the crack 3 is within the detection range of the image sensor 10. The crack change monitoring device is provided with a locking structure 40 corresponding to the fixing hole 61. The locking structure 40 is used in conjunction with the fixing hole 61 of the wall 60 at the position to be detected to achieve the purpose of installing or removing the crack change monitoring device on the wall 60 at the position to be detected; the locking portion 42 of the locking structure 40 expands outward and fixes The inner wall surface of the hole 61 is in contact with the force so that the locking part 42 is locked in the fixing hole 61, and the locking part 42 shrinks inwards and releases the fit with the inner wall surface of the fixing hole 61 so that the locking part 42 is unlocked. That is to say, the locking part 42 can be locked on the wall surface 60 at the position to be detected by radially expanding the locking part 42 outwards, or the locking part 42 shrinks inwards so that the locking part 42 is in an unlocked state separated from the wall surface 60 at the position to be detected, thereby realizing the installation or removal of the box body 50 on the wall surface 60 at the position to be detected. Therefore, this technical solution facilitates the installation and maintenance of the crack change monitoring device; further, the crack change monitoring device is installed on the wall and the detection end of the image sensor 10 is aligned with the crack 3 to be monitored, so that the crack 3 can be continuously monitored and the change and development process of the crack 3 can be tracked so that timely repair and protection can be carried out when necessary.

[0074] Preferably, a plurality of fixing holes 61 are provided on the wall surface 60 at the position to be detected, so it is necessary to provide a plurality of locking structures 40 corresponding to the plurality of fixing holes 61. More specifically, the plurality of locking structures 40 are arranged on the surface of the box body 50 facing the position to be detected, and the plurality of locking structures 40 form a triangle. In this way, a relatively firm support point can be formed to ensure that the entire crack change monitoring device is locked on the wall surface 60 at the position to be detected. In addition, the positions of the plurality of fixing holes 61 on the wall surface 60 must ensure that the wall surface 60 is within the detection range of the image sensor 10.

[0075] Optionally, the number of the locking structures 40 may be three, four or more.

[0076] like Figure 1a As shown, in the first embodiment of the present invention, the crack change monitoring device further includes an output device 30, which is connected to the crack change monitoring unit 20 to output in at least one of display, storage and recording, and alarm.

[0077] Specifically, the output device 30 includes a wireless control unit 31 , and the received data can be sent out through the wireless connection between the wireless control unit 31 and the crack change monitoring unit 20 .

[0078] like Figure 2a to Figure 2cAs shown, in the first embodiment of the present invention, the locking structure 40 also includes a driving member 41 cooperating with the locking portion 42. Under the action of external force, the driving member 41 is movably arranged relative to the box body 50 to drive the locking portion 42 to switch between a locked state and an unlocked state; through the movement of the driving member 41 relative to the box body 50, the locking portion 42 can be expanded radially outward, so that the locking portion 42 is in a locked state.

[0079] In the above arrangement, the external force acts on the driving member 41, so that the driving member 41 can be pushed along the Figure 2a Move upward, thereby driving the locking portion 42 to expand outward (see Figure 2b ). In this way, the locking portion 42 abuts against the inner wall of the fixing hole 61, so that the crack change monitoring device can be locked on the wall surface 60 at the position to be detected. In addition, the above-mentioned method of pushing the driving member 41 by external force is simple and easy to operate.

[0080] Specifically, Figure 2a , 2b As shown in Figure 2c, in the first embodiment of the present invention, when the driving member 41 is driven by pressing the case 50, the inner wall surface of the fixing hole 61 abuts against the driving member 41, so that the locking portion 42 is switched from the unlocked state to the locked state; the driving member 41 abuts against the fixing hole 61, and when the case 50 is pressed, the driving member 41 moves upward relative to the case 50, and the driving member 41 drives the locking portion 42 to expand radially outward, so that the locking portion 42 abuts against the inner wall surface of the fixing hole 61 and presses the inner wall of the fixing hole 61, thereby realizing the switching of the locking portion 42 from the unlocked state to the locked state.

[0081] like Figure 2a As shown, in the first embodiment of the present invention, the driving member 41 has a first inclined surface 411a, and the locking portion 42 has a second inclined surface cooperated with the first inclined surface 411a. Under the drive of external force, the first inclined surface 411a cooperates with the second inclined surface to drive the locking portion 42 to expand outward, thereby driving the locking portion 42 to switch from an unlocked state to a locked state.

[0082] In the above technical solution, when external force is applied (for example, the inner wall of the fixing hole 61 presses the driving member 41), the driving member 41 moves upward, and through the cooperation of the first inclined surface 411a and the second inclined surface, the locking portion 42 is driven to expand outward, so that the locking portion 42 abuts against the inner wall surface of the fixing hole 61 and presses the inner wall of the fixing hole 61, thereby realizing the switching of the locking portion 42 from an unlocked state to a locked state, so that the crack change monitoring device can be fixed on the wall 60 at the position to be detected.

[0083] Specifically, Figure 2aAs shown, the driving member 41 is a columnar structure, specifically a cylinder, a conical structure is provided in the middle of the cylinder, and the locking portion 42 has a second inclined surface arranged in cooperation with the conical structure. Under the drive of external force, the conical structure cooperates with the second inclined surface to drive the locking portion 42 to expand outward, thereby driving the locking portion 42 to switch from an unlocked state to a locked state.

[0084] In the above technical solution, when external force is applied (for example, pressing the box body 50 so that the inner wall of the fixing hole 61 presses the driving member 41), the driving member 41 moves upward, and through the cooperation between the conical structure and the inclined surface of the second inclined surface, the locking portion 42 is driven to expand outward, so that the locking portion 42 abuts against the inner wall surface of the fixing hole 61 and presses the inner wall of the fixing hole 61, so that the crack change monitoring device can be locked on the wall surface 60 at the position to be detected. In this way, the switching of the locking portion 42 from the unlocked state to the locked state is completed.

[0085] Figure 2a A schematic diagram showing the structure of the locking part of the locking structure of the crack change monitoring device of the present invention in an unlocked state. Figure 2a As shown, when the locking portion 42 is in the unlocked state, the driving member 41 has no driving effect on the locking portion 42, the locking portion 42 is released from the fixing hole 61, and the crack change monitoring device can be removed from the wall 60 at the position to be detected. Figure 2b A schematic diagram showing the structure of the locking part of the locking structure of the crack change monitoring device of the present invention in a locked state. Figure 2b As shown, when the locking portion 42 is in the locking state, the locking portion 42 abuts against the fixing hole 61 and presses the fixing hole 61 .

[0086] When the crack change monitoring device needs to be installed on the wall 60 at the position to be detected, Figure 2a As shown, the box body 50 is pressed downward in the direction close to the wall 60, and the driving member 41 first abuts against the inner wall surface of the fixing hole 61, and the inner wall of the fixing hole 61 presses the driving member 41. The driving member 41 moves upward relative to the box body 50, and then the driving member 41 drives the locking portion 42 to expand radially outward, so that the locking portion 42 abuts against the inner wall surface of the fixing hole 61 and presses the inner wall of the fixing hole 61, so that the crack change monitoring device can be locked on the wall 60 at the position to be detected.

[0087] By pressing the box body 50, the crack change monitoring device can be locked on the wall 60. The above installation process is simple and easy to operate.

[0088] like Figure 2cAs shown, in embodiment 1 of the present invention, the locking structure 40 also includes a locking body 43, and the locking portion 42 includes a plurality of claws 421 connected to the locking body 43, and the plurality of claws 421 are arranged along the circumference of the locking body 43. When the locking portion 42 is in a locking state, the plurality of claws 421 all expand outward and abut against the inner wall surface of the fixing hole 61.

[0089] When an external force is applied, the driving member 41 moves upward, driving the locking portion 42 to expand outward, and the plurality of claws 421 abut against the inner wall surface of the fixing hole 61 and gradually press the inner wall of the fixing hole 61, so that the locking portion 42 switches from an unlocked state to a locked state. The plurality of claws 421 are provided to apply a uniform force to the inner wall of the fixing hole 61 in the circumferential direction, so that the entire crack change monitoring device is more firmly installed on the wall 60 at the position to be detected.

[0090] Preferably, the locking portion 42 and the locking body 43 are an integrated structure.

[0091] like Figure 2a and Figure 2b As shown, in the first embodiment of the present invention, a second mounting through hole 51 is provided on the housing 50 of the crack change monitoring device. Specifically, the second mounting through hole 51 is a stepped hole, and the second mounting through hole 51 includes a first hole section and a second hole section. The aperture of the second hole section is larger than the aperture of the first hole section. At least a part of the locking structure 40 is installed in the second hole section.

[0092] like Figure 1a As shown, in the first embodiment of the present invention, the crack change monitoring device further includes a power supply unit 70 located in the box 50, and the image sensor 10 and the crack change monitoring unit 20 are both connected to the power supply unit 70. Specifically, the power supply unit 70 is a battery, which can supply power to the image sensor 10, the crack change monitoring unit 20 and the output device 30 to ensure that the crack change monitoring device works normally.

[0093] Fig.11 FIG. 4 shows a schematic cross-sectional view of the image sensor 10. Fig.11 As shown, in the first embodiment of the present invention, the image sensor 10 includes a housing 16, a photoelectric conversion chip 11, an optical lens 13 and at least one light source 14. The optical lens 13 is located in the cavity of the housing 16, and is used to image the light information reflected from the crack position on the photosensitive part of the photoelectric conversion chip 11; the light source 14 is used to illuminate the position to be detected.

[0094] like Fig.11As shown, in the first embodiment of the present invention, the image sensor 10 further includes a circuit board 12, and the photoelectric conversion chip 11 is electrically connected to the circuit board 12. Specifically, there are multiple light sources 14, preferably three, the number of photoelectric conversion chips 11 is two, and the number of optical lenses 13 is two. Among them, the two optical lenses 13 are arranged in a one-to-one correspondence with the two photoelectric conversion chips 11, and the three light sources 14 are arranged in a one-to-one correspondence. Fig.11 The optical lenses 13 are arranged in a spaced relationship in the left and right directions, and each optical lens 13 is arranged between two adjacent light sources 14. In the above arrangement, the light source 14, the optical lens 13, and the photoelectric conversion chip 11 are all integrated in the cavity of the housing 16, and the structure of the entire image sensor 10 is relatively compact.

[0095] In addition, if Fig.11 As shown, the image sensor 10 further includes a transparent plate 15, which blocks the opening of the cavity of the housing 16. The transparent plate 15, the housing 16 and the circuit board 12 are connected to form a closed cavity, which plays a role in sealing and dustproofing.

[0096] In the first embodiment, the crack change monitoring device further includes a display terminal, which is wirelessly connected to the wireless control unit 31 of the output device 30. The display terminal can receive and display monitoring information of the crack 3, so as to facilitate and clearly understand the change of the crack 3.

[0097] Embodiment 2

[0098] Figure 3a to Figure 3c A structural schematic diagram of a second embodiment of the locking structure of the crack change monitoring device of the present invention is shown.

[0099] The difference between the second embodiment and the first embodiment is that in the second embodiment, the driving member 41 is driven by rotating the driving member 41 in accordance with Figure 3a and Figure 3b In the second embodiment, the rotational motion between the driving member 41 and the nut 80 is converted into the linear reciprocating motion of the driving member 41 by means of threaded engagement. In the second embodiment, the specific structure of the second mounting through hole 51 provided on the box body 50 is also different from that of the first embodiment, and the specific structure of the locking structure 40 is also different from that of the first embodiment.

[0100] Specifically, the second mounting through hole 51 includes a first hole segment, a second hole segment and a third hole segment connected in sequence. The apertures of the first hole segment and the second hole segment are both larger than the aperture of the second hole segment. The nut 80 is fixed in the second hole segment of the second mounting through hole 51.

[0101] In the second embodiment, the locking structure 40 also includes a locking body 43 connected to the locking portion 42, and a first matching through hole 431 is provided on the locking body 43. The driving member 41 includes a driving rod 412 located in the first matching through hole 431, and a protrusion 411 is provided on the driving rod 412. A groove 432 is provided on the inner wall of the first matching through hole 431. When the protrusion 411 slides out of the groove 432, the locking portion 42 is switched from an unlocked state to a locked state under the drive of the protrusion 411.

[0102] In this way, when it is necessary to lock the crack change monitoring device on the wall surface 60 at the position to be detected, Figure 3b As shown, the drive rod 412 is rotated clockwise, and the drive rod 412 moves downward under the action of the threaded cooperation between the drive rod 412 and the nut 80, and the protrusion 411 arranged on the outer periphery of the drive rod 412 slides out of the groove 432, and the protrusion 411 squeezes the drive rod 412, thereby driving the locking portion 42 to expand outward, and then the locking portion presses the inner wall surface of the fixing hole, so that the locking portion 42 is in a locked state.

[0103] Optionally, the protrusion 411 is one of an arc-shaped protrusion, a triangular protrusion, or a rectangular protrusion. Of course, in alternative embodiments not shown in the drawings of the present application, the protrusion 411 can also be set as a rolling body connected to the driving rod 412 in one piece or in a separate piece, such as a rolling body, as long as it can cooperate with the groove 432 and can slide out of the groove 432.

[0104] In addition, if Figure 3c As shown, in the second embodiment of the present invention, the locking body 43 includes two expansion sleeves which are separately arranged, and the two expansion sleeves surround the above-mentioned first matching through hole 431.

[0105] like Figure 3a and Figure 3b As shown, in the second embodiment of the present invention, the driving member 41 also includes a driving end 413 connected to the driving rod 412, and the driving end 413 has a driving inclined surface 4131. Under the action of external force, the driving inclined surface 4131 cooperates with the locking body 43 to drive the locking part 42 to switch from a locked state to an unlocked state.

[0106] In the above arrangement, when the locking portion 42 needs to be switched to the unlocked state, the drive rod 412 is rotated, and the drive rod 412 moves upward through cooperation with the nut 80, thereby driving the driving inclined surface 4131 of the driving end 413 to cooperate with the inclined surface of the locking body 43. In this way, the locking portion 42 and the locking body 43 connected to the locking portion 42 shrink inwardly, and the locking portion 42 and the fixing hole 61 of the wall 60 are unlocked. In this way, the crack change monitoring device can be removed from the wall 60.

[0107] Specifically, the locking portion 42 includes a plurality of claws 421 arranged at intervals along the circumference of the locking body 43, preferably toothed claws 421, and the number of toothed claws 421 can be 8. In this way, when the locking portion 42 is in a locked state, a relatively uniform clamping force can be provided in the circumference of the fixing hole 61 to ensure that the crack change monitoring device is not likely to fall off the wall surface 60. Of course, in alternative embodiments not shown in the drawings of the present application, the number of toothed claws 421 can also be set to 2, 6 or more as needed.

[0108] Below, we will specifically combine the attached Figure 3a and 3b The second embodiment of the present invention is described as follows:

[0109] The drive rod 412 is threadedly connected to the nut 80. Figure 3a As shown, the driving rod 412 is rotated counterclockwise, and the driving rod 412 moves upward under the force of the nut 80, and the protrusion 411 on the driving rod 412 slides into the groove 432 of the locking body 43. The driving end 413 connected to the driving rod 412 is provided with a tapered groove, and the inclined surface of the tapered groove drives the two parts of the locking body 43 corresponding to the groove 432 to shrink inward, so that the claw 421 as the locking part 42 falls off from the fixing hole 61. By rotating the driving rod 412 counterclockwise, the crack change monitoring device can be removed from the wall.

[0110] The driving rod 412 is rotated clockwise, and the driving rod 412 moves downward under the force of the nut 80, and the protrusion 411 on the driving rod 412 slides out of the groove 432 of the locking body 43. The driving end 413 is provided with a tapered groove, and the inclined surface of the tapered groove moves downward to release the tightening force on the multiple claws 421 of the locking part 42. The protrusion 411 on the driving rod 412 drives the part where the groove 432 of the locking body 43 is located to expand outward, and the multiple claws 421 of the locking part 42 expand and press the inner wall of the fixing hole 61. By rotating the driving rod 412 clockwise, the three locking structures 40 are operated in sequence, and the crack change monitoring device can be fixed on the wall.

[0111] It should be noted that the present application is not limited to the specific method of the second embodiment, and any method that can convert the rotational motion into the linear motion of the driving rod 412 is within the protection scope of the present application.

[0112] The structures of the components not mentioned in the second embodiment are the same as those in the first embodiment and will not be described again here.

[0113] Embodiment 3

[0114] Figure 4a and Figure 4b The structural diagram of the third embodiment of the locking structure of the crack change monitoring device of the present invention is shown. Specifically, Figure 4aFIG. 4 is a schematic diagram showing a structure in which the locking portion 42 is in an unlocked state. Figure 4b It shows a structural schematic diagram in which the locking portion 42 is in a locked state (ie, the crack change monitoring device is locked on the wall surface 60 at the position to be detected).

[0115] The difference between the third embodiment and the second embodiment is that the structure for driving the locking part 42 to switch from the unlocked state to the locked state is different. Specifically, in the second embodiment, the locking body 43 includes a first slide groove 433 and a second slide groove 434 provided on the inner wall surface of the first matching through hole 431; the driving member 41 includes a driving rod 412 located in the first matching through hole 431, and a rolling body 414 is provided on the driving rod 412. When the rolling body 414 slides from the second slide groove 434 into the first slide groove 433, the locking part 42 switches from the unlocked state to the locked state under the action of an external force.

[0116] Preferably, the groove depth of the first slide groove 433 is less than the groove depth of the second slide groove 434, and the first slide groove 433 corresponds to the position of the locking portion 42. In this way, when the rolling body 414 is located in the first slide groove 433, the rolling body 414 exerts force on the locking body 43 to make it face outward (such as Figure 4b The force indicated by the middle arrow) can drive the locking portion 42 to be pressed against the inner wall of the fixing hole 61, so that the entire crack change monitoring device can be locked on the wall 60 at the position to be detected.

[0117] Preferably, in the third embodiment of the present invention, the first slide groove 433 and the second slide groove 434 extend along the circumference of the first matching through hole 431. In this way, the driving rod 412 can be rotated and the driving rod 412 can be moved up and down through the threaded cooperation between the driving rod 412 and the nut 80. Since the first slide groove 433 and the second slide groove 434 are both annular grooves extending along the circumference of the first matching through hole 431, the rolling body 414 can slide from the first slide groove 433 into the second slide groove 434 or from the second slide groove 434 into the first slide groove 433, so that the unlocking action or locking action of the locking portion 42 is relatively smooth.

[0118] In addition, if Figure 4a and Figure 4b As shown, in the third embodiment of the present invention, the crack change monitoring device includes two rolling bodies 414 and an elastic member. The driving rod 412 of the driving member 41 is provided with a first mounting through hole 4121 connected to the first matching through hole 431, and the axis of the first mounting through hole 4121 and the axis of the first matching through hole 431 have an angle, and at least part of the rolling body 414 is located in the first mounting through hole 4121.

[0119] The two rolling bodies 414 are circumferentially arranged on the driving rod 412 , so that when the driving rod 412 is rotated, the rolling bodies 414 can apply a uniform force to the locking body 43 , thereby driving the locking portion 42 to be in a locked state.

[0120] Of course, the present application is not limited to setting two rolling bodies 414. In alternative embodiments not shown in the drawings, more rolling bodies 414 can be set according to actual needs, but it is necessary to ensure that multiple rolling bodies 414 can be located in the first slide groove 433 or the second slide groove 434 at the same time.

[0121] like Figure 4a and Figure 4b As shown, in the third embodiment of the present invention, the elastic member is arranged in the first mounting through hole 4121 and between the two rolling bodies 414. By arranging the elastic member, the rolling body 414 can be provided with a force to make it move toward the locking body 43. In this way, when the rolling body 414 slides into the first sliding groove 433, the rolling body 414 always exerts a force on the locking body 43. Figure 4b The force in the direction of the arrow is exerted, thereby driving the locking portion 42 to remain in the locked state.

[0122] Next, we will specifically combine Figure 4a and Figure 4b The third embodiment of the present invention is described as follows:

[0123] The driving rod 412 is threadedly connected with the nut 80. When the driving rod 412 is rotated counterclockwise, the driving rod 412 moves upward due to the force of the nut 80, and the rolling body 414 in the first slide groove 433 rolls out and slides into the second slide groove 434 along the inclined surface. The rolling body 414 releases the expansion force on the locking portion 42 (that is, the rolling body 414 does not apply an outward expansion force to the locking portion 42). A conical groove is provided on the driving end 413, and the groove wall surface of the conical groove forms the above-mentioned driving inclined surface 4131. The driving inclined surface 4131 cooperates with the inclined surface of the locking body 43, thereby driving the locking portion 42 to retract inwardly. At this time, the locking portion 42 is in Figure 4a The unlocked state shown in the figure facilitates the toothed claw 421 as the locking portion 42 to fall off from the fixing hole 61. By sequentially operating the three locking structures 40, the crack change monitoring device can be removed from the wall.

[0124] The driving rod 412 is rotated clockwise, and the driving rod 412 moves downward under the force of the nut 80. The rolling body 414 rolls out of the second slide groove 434 and slides down the inclined surface into the first slide groove 433. The rolling body 414 exerts an outward expansion force on the locking portion 42 and drives the locking portion 42 to expand outward. The driving end 413 is provided with a conical groove, and the groove wall surface of the conical groove moves downward to release the contraction force on the locking portion 42. Under the extrusion force of the rolling body 414, the locking portion 42 expands outward to press the inner wall of the fixing hole 61. At this time, the locking portion 42 is in Figure 4b In the locking state shown, the crack change monitoring device can be fixed on the wall by rotating the driving rod 412.

[0125] In the third embodiment, the rolling body 414 is preferably a ball. Of course, in an alternative embodiment not shown in the drawings, the rolling body can also be set as a roller or the like.

[0126] It should be noted that in the third embodiment, the specific structure of the driving end 413 is the same as that in the second embodiment, and the specific structure of the second mounting through hole 51 provided on the box body 50 is also the same as that in the second embodiment, which will not be described again here.

[0127] Embodiment 4

[0128] Figure 5a and Figure 5b A structural schematic diagram of a fourth embodiment of the locking structure of the crack change monitoring device of the present invention is shown.

[0129] The difference between the fourth embodiment and the third embodiment is that in the fourth embodiment, the nut 80 is not provided, and the driving member 41 is ensured to be movable relative to the box body 50 by directly pressing or pulling the driving member 41 . Figure 5a A schematic structural diagram showing a locking portion of the locking structure 40 in an unlocked state; Figure 5b It shows a structural schematic diagram of the locking portion of the locking structure 40 being in a locked state.

[0130] In the fourth embodiment, the structure for driving the locking portion 42 to switch between the locked state and the unlocked state is the same as that in the third embodiment, and will not be described in detail here.

[0131] Combine the following Figure 5a and 5b Only the specific operation method of this fourth embodiment is described:

[0132] The driving rod 412 is pulled upward, and the rolling body 414 in the first slide groove 433 rolls out and slides into the second slide groove 434 along the inclined surface. The rolling body 414 releases the expansion force on the locking portion 42 (that is, the rolling body 414 does not apply an outward expansion force to the locking portion 42). A conical groove is provided on the driving end 413, and the groove wall of the conical groove forms the above-mentioned driving inclined surface 4131. The driving inclined surface 4131 cooperates with the inclined surface of the locking body 43, thereby driving the locking portion 42 to retract inwardly, so that the toothed claw 421 serving as the locking portion 42 falls off from the fixing hole 61. At this time, the locking portion 42 is in Figure 5a The unlocked state is shown. This allows the crack change monitoring device to be removed from the wall.

[0133] The driving rod 412 is pushed downward, and the rolling body 414 rolls out of the second slide groove 434 and slides into the first slide groove 433 along the inclined surface. The rolling body 414 exerts an outward expansion force on the locking portion 42 and drives the locking portion 42 to expand outward. A conical groove is provided on the driving end 413, and the groove wall surface of the conical groove moves downward to release the contraction force on the locking portion 42. Under the squeezing force of the rolling body 414, the locking portion 42 expands outward to press the inner wall of the fixing hole 61 (that is, the locking portion 42 is in Figure 5b By pulling the driving rod 412 downward, the crack change monitoring device can be fixed on the wall.

[0134] Embodiment 5

[0135] Figure 6a and Figure 6b A structural schematic diagram of a fifth embodiment of the locking structure of the crack change monitoring device of the present invention is shown.

[0136] The difference between the fifth embodiment and the first embodiment is that in the fifth embodiment, the driving member 41 cannot move up and down relative to the axis of the second mounting through hole 51 of the box body 50 , and the driving member 41 is rotatably arranged around the axis of the second mounting through hole 51 .

[0137] Therefore, in the fifth embodiment, the driving member 41 is only rotatably arranged relative to the box body 50, and the locking portion 42 can be driven to switch between the locked state and the unlocked state by rotating the driving member 41.

[0138] Since the movement mode of the driving member 41 of the fifth embodiment is different from that of the driving member 41 of the first embodiment, the specific structures of the driving member 41, the locking portion 42 and the locking body 43 of the locking structure 40 in the fifth embodiment are also different from those in the first embodiment.

[0139] In embodiment 5, Figure 6a and Figure 7As shown, the locking structure 40 also includes a first rolling body 415 connected to the locking portion 42, a first matching through hole 431 and a first sliding groove 433 opened on the inner wall surface of the first matching through hole 431 are provided on the locking body 43, and the driving member 41 includes a driving rod 412 located in the first matching through hole 431. Under the action of the rotational force, the driving rod 412 drives the first rolling body 415 to slide out of the first sliding groove 433 and abut against the inner wall surface of the first matching through hole 431, thereby driving the locking portion 42 to switch to a locking state.

[0140] Through the above arrangement, the locking portion 42 can be driven to be in a locked state by rotating the driving rod 412, so that the crack change monitoring device is installed on the wall surface 60 at the position to be detected. The above process of installing the crack change monitoring device is simple and easy to operate.

[0141] like Figure 6b and Fig.10 As shown, a second sliding groove 434 is provided on the outer wall surface of the locking body 43, the locking structure 40 also includes a second rolling body 416, and the driving member 41 also includes a driving end 413 connected to the driving rod 412, and the second rolling body 416 is located between the driving end 413 and the outer wall surface of the locking body 43. Under the action of the rotational force, the driving end 413 drives the second rolling body 416 to slide out of the second sliding groove 434, thereby driving the locking part 42 to switch to an unlocked state.

[0142] Through the above arrangement, the driving rod 412 is rotated in the opposite direction, and the driving end 413 drives the second rolling body 416 to slide out of the second sliding groove 434, and the second rolling body 416 applies a force to the locking body 43 to make it move toward the direction of the axis of the driving rod 412 (i.e., drive the locking body 43 to shrink inward), so that the locking part 42 can be driven to shrink, so that the crack change monitoring device can be removed from the wall 60. Therefore, the operation of disassembling and installing the crack change monitoring device of the technical solution is simple, which is convenient for operators to perform maintenance work.

[0143] Specifically, Figure 6a As shown, when the first rolling body 415 cooperates with the first sliding groove 433 and the second rolling body 416 slides out of the second sliding groove, the locking portion 42 switches from the locked state to the unlocked state; Figure 6b As shown, when the first rolling body 415 slides out from the first sliding groove 433 and the second rolling body 416 cooperates with the second sliding groove, the locking portion 42 switches from the unlocking state to the locking state.

[0144] Specifically, the first slide groove 433 is not a closed annular groove, that is, the first rolling body 415 has a first position matched with the first slide groove 433 and a second position abutting against the inner wall of the first matching through hole 431 (i.e. sliding out of the first slide groove 433). By switching the first rolling body 415 from the first position to the second position, the locking portion 42 can be driven to be in a locked state, so that the crack change monitoring device can be installed on the wall 60 at the position to be detected.

[0145] The second slide groove 434 is not a closed annular groove either, and the second rolling body 416 has a first position that matches the second slide groove 434 and a second position that abuts against the outer wall surface of the locking body 43 (i.e., the second rolling body 416 slides out of the second slide groove 434 and abuts against the outer wall surface of the locking body 43). In this way, by rotating the driving rod 412, the second rolling body 416 can be driven to switch from the first position to the second position, thereby facilitating the subsequent driving of the locking part 42 to be in an unlocked state. In this way, it is convenient for the operator to remove the crack change monitoring device from the wall surface 60.

[0146] like Figure 6a and Figure 6b As shown, in the fifth embodiment of the present invention, the crack change monitoring device includes two first rolling bodies 415, the driving rod 412 of the driving member 41 is provided with a first mounting through hole 4121 connected to the first matching through hole 431, the axis of the first mounting through hole 4121 and the axis of the first matching through hole 431 have an angle, and at least part of the first rolling body 415 is located in the first mounting through hole 4121. The crack change monitoring device also includes a first elastic member, which is arranged in the first mounting through hole 4121 and between the two first rolling bodies 415.

[0147] like Figure 6a and Figure 6b As shown, in embodiment five of the present invention, the locking structure 40 also includes a plurality of second rolling bodies 416, and the plurality of second rolling bodies 416 are arranged at circumferential intervals along the locking body 43. The crack change monitoring device also includes a plurality of second elastic members arranged corresponding to the plurality of second rolling bodies 416, and the second elastic members are used to apply a force to the second rolling bodies 416 to make them move toward the locking body 43.

[0148] Providing a plurality of second rolling bodies 416 can provide a more uniform force, so that the switching process of the locking portion 42 is smoother.

[0149] Next, combine Figures 6a to 10 The operation method of the fifth embodiment is described in detail below:

[0150] The driving rod 412 is rotated counterclockwise, and the second rolling body 416 rolls out from the second sliding groove 434, and the second rolling body 416 locks the body 43 to shrink. At the same time, the first rolling body 415 slides into the first sliding groove 433, releasing the expansion force on the locking body 43. At this time, the locking portion 42 is in Figure 6a The unlocked state shown in FIG. 4 can make the claw 421 of the locking portion 42 fall off from the fixing hole 61. In other words, by rotating the driving rod 412 counterclockwise, the crack change monitoring device can be removed from the wall.

[0151] The driving rod 412 is rotated clockwise, and the first rolling body 415 rolls out from the first sliding groove 433. The first rolling body 415 pushes the locking body 43 to expand, and the second rolling body 416 slides into the second sliding groove 434 and releases the contraction force on the locking body 43. At this time, the locking portion 42 is in Figure 6b The locking state shown in the figure can make the claw 421 of the locking portion 42 expand and press the inner wall of the fixing hole 61. By rotating the driving rod 412 clockwise, the crack change monitoring device can be fixed on the wall.

[0152] In the fifth embodiment, the locking body 43 includes two expansion sleeves which are separately arranged, and the two expansion sleeves surround the above-mentioned first matching through hole 431. The above-mentioned arrangement facilitates the assembly of the locking body 43. In addition, four claws 421 are evenly spaced on the outer wall surface of each expansion sleeve, so that when the locking part 42 is in the locking state, the eight claws 421 evenly spaced can evenly press the inner wall surface of the fixing hole 61 to prevent the crack change monitoring device from falling off from the wall surface 60.

[0153] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by pressing, rotating or pushing and pulling the driving rod, the locking part can be driven to expand radially outward or contract inward. When the locking part expands outward, the locking part is in a locked state pressed against the inner wall of the fixing hole. When the locking part contracts inward, the locking part is in an unlocked state separated from the wall surface at the position to be detected, thereby achieving the purpose of installing the crack change monitoring device on the wall surface at the position to be detected or removing the crack change monitoring device from the above-mentioned wall surface. Therefore, this technical solution facilitates the installation and maintenance of the crack change monitoring device; further, the crack change monitoring device is installed on the wall and the detection end of the image sensor is aligned with the crack to be monitored, so that the crack can be continuously monitored and the change and development process of the crack can be tracked, so that timely repair and protection can be carried out when necessary.

[0154] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0155] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0156] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0157] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crack change monitoring device, characterized in that: The crack change monitoring device comprises: A box body (50), the box body (50) having a detection surface, the detection surface being arranged in close contact with a position to be detected; An image sensor (10) is located in the housing (50), the detection end of the image sensor (10) being arranged toward the detection surface, the image sensor (10) comprising a housing (16), a photoelectric conversion chip (11), and at least one light source (14); A crack change monitoring unit (20) connected to the image sensor (10) and obtaining width change data of the crack at the position to be detected based on a signal detected by the image sensor; a locking structure (40), wherein the box body (50) is installed at the position to be detected via the locking structure (40), the locking structure (40) comprising a locking portion (42), the locking portion (42) being capable of radially expanding outward or contracting inward, and when the locking portion (42) expands outward, the locking portion (42) is in a locked state in which the box body (50) is locked on the wall surface of the position to be detected; and when the locking portion (42) contracts inward, the locking portion (42) is in an unlocked state in which the box body (50) is separated from the wall surface of the position to be detected; The locking structure further comprises a driving member (41) cooperating with the locking portion (42); under the action of an external force, the driving member (41) is movably arranged relative to the box body (50) to drive the locking portion (42) to switch between the locked state and the unlocked state; the driving member (41) is movably arranged relative to the box body (50) by pressing the box body (50) or operating the driving member (41); When the driving member (41) is driven by operating the driving member (41), the locking portion (42) is driven to switch between the locking state and the unlocking state by pressing or pulling the driving member (41); The locking structure (40) further comprises a locking body (43) connected to the locking portion (42), the locking body (43) being provided with a first matching through hole (431) and a first slide groove (433) and a second slide groove (434) provided on the inner wall surface of the first matching through hole, the driving member (41) comprising a driving rod (412) located in the first matching through hole (431), the driving rod (412) being provided with a rolling body (414) or a protrusion, when the rolling body (414) or the protrusion slides from the second slide groove (434) into the first slide groove (433), under the action of an external force, the locking portion (42) switches from the unlocked state to the locked state; The driving member (41) further comprises a driving end (413) connected to the driving rod (412), wherein the driving end (413) has a driving inclined surface (4131). When the driving rod (412) is pulled upward, the driving inclined surface (4131) cooperates with the locking body (43) to drive the locking portion (42) to switch from the locking state to the unlocking state. At this time, the rolling body (414) slides from the first sliding groove (433) into the second sliding groove (434).

2. The crack change monitoring device according to claim 1, characterized in that: The groove depth of the first sliding groove (433) is smaller than the groove depth of the second sliding groove (434); or the first sliding groove (433) and the second sliding groove (434) both extend along the circumference of the first matching through hole (431) to form an annular groove.

3. The crack change monitoring device according to claim 1 or 2, characterized in that: The crack change monitoring device comprises two rolling bodies (414); a first mounting through hole (4121) connected to the first matching through hole (431) is provided on the driving rod (412) of the driving member (41); an angle is formed between the axis of the first mounting through hole (4121) and the axis of the first matching through hole (431); at least a portion of the rolling body (414) is located in the first mounting through hole (4121); and the crack change monitoring device further comprises an elastic member, which is arranged in the first mounting through hole (4121) and located between the two rolling bodies (414).

4. A crack change monitoring device, characterized in that: The crack change monitoring device comprises: A box body (50), the box body (50) having a detection surface, the detection surface being arranged in close contact with a position to be detected; An image sensor (10) is located in the housing (50), the detection end of the image sensor (10) being arranged toward the detection surface, the image sensor (10) comprising a housing (16), a photoelectric conversion chip (11), and at least one light source (14); A crack change monitoring unit (20) connected to the image sensor (10) and obtaining width change data of the crack at the position to be detected based on a signal detected by the image sensor; a locking structure (40), wherein the box body (50) is installed at the position to be detected via the locking structure (40), the locking structure (40) comprising a locking portion (42), the locking portion (42) being capable of radially expanding outward or contracting inward, and when the locking portion (42) expands outward, the locking portion (42) is in a locked state in which the box body (50) is locked on the wall surface of the position to be detected; and when the locking portion (42) contracts inward, the locking portion (42) is in an unlocked state in which the box body (50) is separated from the wall surface of the position to be detected; The locking structure further comprises a driving member (41) cooperating with the locking portion (42); under the action of an external force, the driving member (41) is arranged to be rotatable relative to the box body (50); and the locking portion (42) can be driven to switch between the locking state and the unlocking state by rotating the driving member (41); The locking structure (40) further comprises a locking body (43) connected to the locking portion (42) and a first rolling body (415); the locking body (43) is provided with a first matching through hole (431) and a first sliding groove (433) provided on the inner wall surface of the first matching through hole (431); the driving member (41) comprises a driving rod (412) located in the first matching through hole (431); under the action of a rotational force, the driving rod (412) drives the first rolling body (415) to slide out of the first sliding groove (433) and abut against the inner wall surface of the first matching through hole (431), thereby driving the locking portion (42) to switch to the locking state; A second sliding groove (434) is provided on the outer wall surface of the locking body (43), the locking structure (40) further includes a second rolling body (416), and the driving member (41) further includes a driving end (413) connected to the driving rod (412), and the second rolling body (416) is located between the driving end (413) and the outer wall surface of the locking body (43), and under the action of the rotational force, the driving end (413) drives the second rolling body (416) to slide out of the second sliding groove (434), thereby driving the locking part (42) to switch to the unlocking state.

5. The crack change monitoring device according to claim 4, characterized in that: The crack change monitoring device comprises two first rolling bodies (415); a first mounting through hole (4121) connected to the first matching through hole (431) is provided on the driving rod (412) of the driving member (41); an angle is formed between the axis of the first mounting through hole (4121) and the axis of the first matching through hole (431); at least a portion of the first rolling body (415) is located in the first mounting through hole (4121); and the crack change monitoring device further comprises a first elastic member, which is arranged in the first mounting through hole (4121) and between the two first rolling bodies (415).

6. The crack change monitoring device according to claim 4, characterized in that: The locking structure (40) further comprises a plurality of second rolling bodies (416), wherein the plurality of second rolling bodies (416) are arranged at intervals along the circumference of the locking body (43), and the crack change monitoring device further comprises a plurality of second elastic members arranged corresponding to the plurality of second rolling bodies (416), wherein the second elastic members are used to apply a force to the second rolling bodies (416) so that the second rolling bodies (416) are directed toward the locking body (43).

7. The crack change monitoring device according to claim 1 or 4, characterized in that: The locking structure (40) further comprises a locking body (43); the locking portion (42) comprises a plurality of claws (421) connected to the locking body (43); the plurality of claws (421) are arranged along the circumference of the locking body (43).

8. The crack change monitoring device according to claim 1 or 4, characterized in that: The box body (50) is provided with a second mounting through hole (51), and at least a portion of the locking structure (40) is mounted in the second mounting through hole (51).

9. The crack change monitoring device according to claim 1 or 4, comprising a plurality of the locking structures (40), wherein the plurality of the locking structures (40) are arranged on a surface of the box body (50) facing the position to be detected, and the plurality of the locking structures (40) form a triangle.

10. The crack change monitoring device according to claim 1 or 4, further comprising a power supply unit (70) located in the box (50), and the image sensor (10) and the crack change monitoring unit (20) are both connected to the power supply unit (70).

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