A displacement sensor fixing device for structural crack monitoring

Abstract

This application relates to the field of building structure monitoring technology, specifically disclosing a displacement sensor fixing device for monitoring structural cracks. The device includes a first base and a second base. The first base has a magnetic suction part and a positioning hole near the magnetic suction part along a first direction. The first base is used to fix the crack to the wall surface. The second base is detachably connected to the first base. The surface of the second base facing the first base has a magnetic element and a positioning pin near the magnetic element. The surface of the second base away from the first base is rotatably connected to a pivot rod for connecting and fixing the displacement sensor. The second base and the first base are used in pairs. The relative position of the second base to the first base can be adjusted along the first direction. The device realizes the adjustment of the displacement sensor's posture. When the displacement sensor needs to be temporarily removed for maintenance or calibration, it can be quickly and accurately restored to the original installation position, ensuring the continuity and accuracy of the monitoring data.

Description

Technical Field

[0001] This application relates to the field of building structure monitoring technology, and in particular to a displacement sensor fixing device for monitoring structural cracks. Background Technology

[0002] During construction and operation, building structures are subject to various adverse factors, which can lead to uneven settlement and deformation. When the deformation reaches a certain threshold, some weaker and heavier components in the building structure may develop cracks, which may further lead to component breakage, structural tilting or collapse, endangering life and property. Therefore, in order to understand the development of tilting and cracks in a timely manner, predict the development trend of tilting and cracks, and assess the safety status of buildings, it is essential to monitor and provide early warning of building structure settlement, tilting and cracks.

[0003] In related technologies, to improve monitoring accuracy, linear displacement sensors are generally used to monitor cracks in building structures. Specifically, displacement sensors that monitor crack changes in real time are installed at the location of the largest crack. Figure 1 The diagram shows a linear displacement sensor. Before monitoring cracks, the two ends of the displacement sensor need to be fixed across both sides of the crack. When the cracks in the building structure change, the displacement sensor directly collects the crack change data.

[0004] However, currently, displacement sensors are mainly fixed during installation using a simple L-shaped steel sheet structure and screws (such as...). Figure 1 As shown in the figure, with this fixing method, once one of the steel plates is fixed to the wall, the position of the displacement sensor is determined because it is rigidly connected to the steel plate. When the position needs to be finely adjusted, the screws need to be removed and adjusted again. Thus, when the position adjustment range is small, if the two screw holes partially overlap, it is easy to cause the installation to be unstable. At the same time, when the sensor needs to be temporarily removed (such as for maintenance or calibration), it is difficult to accurately restore it to the original installation position. Disassembly and assembly are difficult and affect the continuity and accuracy of monitoring data. Utility Model Content

[0005] This invention proposes a displacement sensor fixing device for structural crack monitoring, aiming to at least solve the problem in related technologies where displacement sensors for structural crack monitoring are fixed with simple steel sheets and screws. When the sensor needs to be temporarily removed, it is difficult to accurately restore it to its original installation position, resulting in difficult disassembly and assembly and affecting the continuity and accuracy of monitoring data.

[0006] To achieve the above objectives, the first aspect of this application provides a displacement sensor fixing device for structural crack monitoring, comprising:

[0007] A first base is provided with a magnetic suction part and a positioning hole near the magnetic suction part along a first direction. The first base is used to fix the crack to the wall surface where the crack is located.

[0008] The second base is detachably connected to the first base. The surface of the second base facing the first base is provided with a magnetic element and a positioning pin near the magnetic element. The surface of the second base away from the first base is rotatably connected to a pivot rod for connecting and fixing the displacement sensor. The second base and the first base are used in pairs, and the relative positions of the second base and the first base in the first direction are adjustable.

[0009] In some embodiments, at least two sets of positioning holes are spaced apart on the surface of the first base, and multiple positioning holes are spaced apart along the first direction in each set, and each positioning hole is used to adapt to the positioning pin.

[0010] In some embodiments, the magnetic suction part is located between the two sets of positioning holes, and the magnetic suction part has a recessed groove that extends through both ends of the first base along the first direction.

[0011] In some embodiments, the width of the sinking groove along the second direction matches the width of the magnetic element along the second direction, and the depth of the sinking groove along the thickness direction of the first base is greater than or equal to the height of the magnetic element protruding from the surface of the second base.

[0012] In some embodiments, the second base has a limiting cavity on its surface opposite to the first base, and one end of the pivot rod extends into the limiting cavity and is provided with an insert.

[0013] In some embodiments, a connecting portion is provided at the end of the pivot rod away from the insert, the connecting portion being used to connect with the displacement sensor.

[0014] In some embodiments, the connecting portion includes a threaded hole section disposed at one end of the pivot rod and a screw section disposed at the top of the threaded hole section, wherein the central axis of the threaded hole section intersects the central axis of the screw section.

[0015] In some embodiments, the limiting cavity is a circular cavity, and the limiting cavity is adapted to the outer contour of the insert.

[0016] In some embodiments, the magnetic suction part has a through hole along the thickness direction of the first base, and the through hole is used for mounting and fixing the first base.

[0017] Compared with the prior art, one or more technical solutions provided in this application have at least the following beneficial effects or advantages:

[0018] The fixing device provided in this application uses a first base and a second base, which are used in pairs. The first base is fixed to both sides of the crack to be monitored by screws. With the magnetic attraction part and positioning hole provided on the first base along the first direction, and the magnetic part and positioning pin provided on the second base facing the surface of the first base, when the position of the displacement sensor needs to be adjusted, the second base can be directly removed and re-magnetically connected and fixed to the first base in the first direction, so that the distance between the two second bases can be quickly adjusted. With the pivot rod provided on the top surface of the second base, which is rotatably connected to the second base, the angle and direction of the displacement sensor can be adjusted when one end of the displacement sensor is connected and fixed to the second base. When the displacement sensor needs to be temporarily removed for maintenance or calibration, it can be quickly and accurately restored to the original installation position, ensuring the continuity and accuracy of the monitoring data.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the installation structure of an existing displacement sensor according to an embodiment of this application;

[0022] Figure 2 This is a structural schematic diagram of the fixing device and displacement sensor provided according to the embodiments of this application;

[0023] Figure 3 This is a structural schematic diagram of the first base and the second base provided according to the embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the second base provided according to an embodiment of this application;

[0025] Figure 5 This is a cross-sectional view of the second base along the second direction according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the fixing device installed on the wall according to the embodiments of this application.

[0027] Figure label:

[0028] 100. Fixture;

[0029] 10. First base; 11. Magnetic suction part; 111. Recessed groove; 112. Through hole; 12. Positioning hole;

[0030] 20. Second base; 21. Magnetic component; 22. Positioning pin; 23. Pivot rod; 231. Insert; 232. Screw hole section; 233. Screw section; 24. Limiting cavity; 241. Limiting hole; 25. Flange; 251. Groove

[0031] 200. Displacement sensor; 201. L-shaped steel sheet;

[0032] 300. Wall structure; 301. Cracks to be tested;

[0033] A. First direction; B. Second direction. Detailed Implementation

[0034] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.

[0036] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] 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 application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0039] Please see Figure 1 To monitor cracks in building structures, linear displacement sensors 200 are typically used to collect data on crack changes. Real-time data acquisition is achieved by fixing the two ends of the linear displacement sensor 200 to both sides of the crack. Related technologies employ methods such as... Figure 1 The L-shaped steel sheet 201 shown fixes the linear displacement sensor 200 to the wall surface. During use, since the position of the linear displacement sensor 200 is not arbitrarily determined, it is generally necessary to find the position with the largest crack for installation. Therefore, the position adjustment of the displacement sensor 200 is required multiple times during the installation process. When the displacement sensor 200 is used for a long time, it needs to be maintained or calibrated. The displacement sensor 200 needs to be disassembled and reassembled.

[0040] The inventors discovered that, on the one hand, during the installation process, once the L-shaped steel plate 201 on one side is fixed, the displacement sensor 200 is rigidly connected to the steel plate, meaning the orientation of the threaded hole on the L-shaped steel plate 201 is fixed. Therefore, the position of the displacement sensor 200 is also fixed. If adjustment is required, the screws need to be removed and readjusted. Thus, when the position adjustment range is small, if the two screw holes partially overlap, the installation may be unstable. Since it needs to be fixed to the wall, the disassembly and assembly process is difficult. On the other hand, when the sensor needs to be temporarily removed (such as for maintenance or calibration), it is difficult to accurately restore it to the original installation position, which affects the continuity and accuracy of the monitoring data.

[0041] Based on this, the inventors propose a displacement sensor fixing device for structural crack monitoring. This fixing device is used to connect and fix the displacement sensor 200 for structural crack monitoring. It not only facilitates the position adjustment of the displacement sensor 200, but also makes it easier to disassemble and install the displacement sensor 200 when it needs maintenance or calibration.

[0042] Please see Figures 2 to 5This embodiment provides a displacement sensor fixing device for structural crack monitoring. The fixing device 100 includes a first base 10 and a second base 20. The first base 10 is provided with a magnetic suction part 11 and a positioning hole 12 near the magnetic suction part 11 along a first direction A. The first base 10 is used to fix the crack to the wall surface. The second base 20 is detachably connected to the first base 10. The surface of the second base 20 facing the first base 10 is provided with a magnetic element 21 and a positioning pin 22 near the magnetic element 21. The surface of the second base 20 away from the first base 10 is rotatably connected to a pivot rod 23 for connecting and fixing a displacement sensor 200. The second base 20 and the first base 10 are used in pairs. The relative position of the second base 20 and the first base 10 can be adjusted along the first direction A.

[0043] It should be understood that since a typical displacement sensor 200 requires installation and fixation at both ends during use, the fixing device 100 in this embodiment is used in pairs, that is, each fixing device 100 includes a first base 10 and a second base 20. The projected outline of the first base 10 along its thickness direction can be rectangular. The first base 10 can be made of a magnetically attracted metal material, such as iron. For ease of description, the first direction A is defined as the length direction along the first base 10, and the second direction B is defined as the width direction along the first base 10.

[0044] It should be noted that the first base 10 can be fixed to the corresponding wall with high-strength screws. At the same time, the limiting hole 241 opened on the first base 10 can be a cylindrical blind hole, and the positioning pin 22 can be a cylindrical column. The positioning pin 22 can be inserted into the limiting hole 241. The magnetic part 11 can be set on the upper surface of the first base 10 along the first direction A.

[0045] It should also be noted that the second base 20 can be made of metal or high-hardness plastic. In order to facilitate the adjustment of the distance between the two second bases 20 along the first direction A, the length of the second base 20 along the first direction A should be less than the length of the first base 10 along the first direction A. At the same time, the magnetic component 21 set at the bottom of the second base 20 can be made of magnetic material. In order to improve the adsorption connection between the first base 10 and the second base 20, the magnetic component 21 can be made of high magnetic material. The magnetic component 21 can be fixedly connected to the bottom surface of the second base 20 by means of a slot and a buckle, depending on the actual needs. Of course, the length of the magnetic component 21 along the second direction B should be adapted to the length of the magnetic suction part 11 along the second direction B. The pivot rod 23 is used to connect and fix one end of the displacement sensor 200.

[0046] Meanwhile, the ability of the second base 20 to adjust its relative position with the first base 10 along the first direction A means that after the two first bases 10 are fixed relative to each other on the wall, the second base 20 can be moved to adjust its relative position with the first base 10, thereby changing the distance between the two second bases 20.

[0047] In this embodiment, the fixing device 100 is configured with a first base 10 and a second base 20, which are used in pairs. The first base 10 is fixed to both sides of the crack to be monitored by screws. With the magnetic attraction part 11 and positioning hole 12 provided in the first direction A of the first base 10, and the magnetic part 21 and positioning pin 22 provided in the second base 20 facing the surface of the first base 10, when the position of the displacement sensor 200 needs to be adjusted, the second base 20 can be directly removed and re-magnetically connected and fixed to the first base 10 in the first direction A, so that the distance between the two second bases 20 can be quickly adjusted. With the pivot rod 23 provided in the top surface of the second base 20, the pivot rod 23 is rotatably connected to the second base 20, so that when one end of the displacement sensor 200 is connected and fixed to the second base 20, the angle of the displacement sensor 200 can be adjusted. When the displacement sensor 200 needs to be temporarily removed for maintenance or calibration, it can be quickly and accurately restored to the original installation position, ensuring the continuity and accuracy of the monitoring data.

[0048] Continue reading Figure 3 and Figure 4 In some embodiments, at least two sets of positioning holes 12 are spaced apart on the surface of the first base 10. Each set of positioning holes 12 has multiple holes spaced apart along the first direction A, and each positioning hole 12 is adapted to a positioning pin 22. Each set of positioning holes 12 can have six, eight, or ten holes, depending on the actual needs. The distance between two adjacent positioning holes 12 can be set to be equal. At the same time, two positioning pins 22 are spaced apart along the second direction B on the bottom surface of the second base 20. The distance between the two positioning pins 22 is equal to the distance between two adjacent positioning holes 12 in the second direction B. Thus, by setting two sets of positioning holes 12, when the second base 20 is magnetically connected to the first base 10, the second base 20 can be further fixed and limited, thereby providing structural stability of the fixing device 100. At the same time, the position of the second base 20 can be adjusted in the first direction A.

[0049] It should be noted that, in order to facilitate the fixing of the first base 10 to the wall, the magnetic part 11 has a through hole 112 along the thickness direction of the first base 10. Two through holes 112 can be provided, and the two through holes 112 are spaced apart along the first direction A. In this way, it is convenient to fix the first base 10 to the wall with screws.

[0050] Optionally, the magnetic part 11 is located between the two sets of positioning holes 12, and the magnetic part 11 has a recessed groove 111 that extends through both ends of the first base 10 along the first direction A. The width of the recessed groove 111 along the second direction B matches the width of the magnetic element 21 along the second direction B. The depth of the recessed groove 111 along the thickness direction of the first base 10 is greater than or equal to the height of the magnetic element 21 protruding from the surface of the second base 20.

[0051] With this configuration, when the second base 20 is magnetically attached to the first base 10, the magnetic component 21 can extend into the recessed groove 111, thereby cooperating with the recessed groove 111 to improve the stability of the second base 20 after it is magnetically attached to the first base 10. At the same time, the magnetic component 21 allows for repeated adjustment of the connection of the second base 20. When the position and posture of the displacement sensor 200 need to be adjusted, the second base 20 can be directly removed and re-magnetically attached to the first base 10 in the first direction A, thereby allowing for quick adjustment of the distance between the two second bases 20.

[0052] Optionally, flanges 25 can be provided on both sides of the second base 20 along the second direction B. The flanges 25 extend along the second base 20 to a height above its upper surface. At the same time, holes or grooves can be provided on the flanges 25 to facilitate the removal or installation of the second base 20 from the first base 10 by the operator. Furthermore, a groove 251 can be provided at the bottom of the flanges 25. At the same time, markings, such as scale lines, are provided on the first base 10. The groove 251 can be used to determine the connection position between the second base 20 and the first base 10, so as to facilitate the positioning for reinstallation when the displacement sensor 200 is disassembled for maintenance or calibration.

[0053] Continue reading Figure 5 In some embodiments, the second base 20 has a limiting cavity 24 on its surface away from the first base 10. One end of the pivot rod 23 extends into the limiting cavity 24 and is provided with an insert 231. The end of the pivot rod 23 away from the insert 231 is provided with a connecting part. The connecting part is used to connect the displacement sensor 200. The connecting part includes a screw hole section 232 provided at one end of the pivot rod 23 and a screw section 233 provided at the top of the screw hole section 232. The central axis of the screw hole section 232 intersects the central axis of the screw section 233. The limiting cavity 24 is a circular cavity and is adapted to the outer contour of the insert 231.

[0054] It should be noted that the limiting cavity 24 can be cylindrical, and a limiting hole 241 is opened on the top surface of the limiting cavity 24. One end of the pivot rod 23 passes through the limiting hole 241 and is provided with an insert 231 that cooperates with the limiting cavity 24. That is, the insert 231 can be set in a cylindrical shape, so that the pivot rod 23 can rotate on the second base 20 along its central axis. When the wall crack is inclined, after the first base 10 is installed and fixed on the wall, the second base 20 can be adjusted along the first direction A. The setting of the pivot rod 23 can also realize the angle adjustment of the orientation of the displacement sensor 200, even if one end of the displacement sensor 200 is connected to the pivot rod 23.

[0055] Meanwhile, the screw hole section 232 and the screw rod section 233 set on the top of the screw hole section 232 can be used to connect with the displacement sensor 200 with screw holes, while the screw rod section 233 can be used to connect with the displacement sensor 200 with screw holes at both ends. This configuration improves the adaptability of the fixing device 100.

[0056] Please see Figure 3 and Figure 6 This embodiment provides the actual installation process of the fixing device 100. At the larger gap of the crack 301 to be tested in the wall structure 300, two first bases 10 are installed on both sides of the crack 301 to be tested with screws. At the same time, the two second bases 20 can be pre-installed and connected to both ends of the displacement sensor 200. Then, the second bases 20 and the first bases 10 are attracted and fixed by magnetic attraction. Due to the setting of the pivot rod 23, the displacement sensor 200 can rotate along the pivot rod 23. At the same time, the second bases 20 and the first bases 10 are detachably connected, which facilitates the installation and removal of the displacement sensor 200.

[0057] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0060] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A displacement sensor fixture for structural crack monitoring, characterized by, include: A first base is provided with a magnetic suction part and a positioning hole near the magnetic suction part along a first direction. The first base is used to fix the crack to the wall surface where the crack is located. The second base is detachably connected to the first base. The surface of the second base facing the first base is provided with a magnetic element and a positioning pin near the magnetic element. The surface of the second base away from the first base is rotatably connected to a pivot rod for connecting and fixing the displacement sensor. The second base and the first base are used in pairs, and the relative positions of the second base and the first base in the first direction are adjustable.

2. The displacement sensor fixture for structural crack monitoring of claim 1, wherein, At least two sets of positioning holes are spaced apart on the surface of the first base, and multiple positioning holes are spaced apart along the first direction in each set, and each positioning hole is used to adapt to the positioning pin.

3. The displacement sensor fixing device for structural crack monitoring according to claim 2, characterized in that, The magnetic suction part is located between the two sets of positioning holes, and the magnetic suction part has a recessed groove that runs through both ends of the first base along the first direction.

4. The displacement sensor fixing device for structural crack monitoring according to claim 3, characterized by, The width of the sinking groove along the second direction matches the width of the magnetic component along the second direction, and the depth of the sinking groove along the thickness direction of the first base is greater than or equal to the height of the magnetic component protruding from the surface of the second base.

5. The displacement sensor fixture for structural crack monitoring of claim 1, wherein, The second base has a limiting cavity on its surface away from the first base, and one end of the pivot rod extends into the limiting cavity and is provided with an insert.

6. The displacement sensor fixing device for structural crack monitoring according to claim 5, wherein The pivot rod has a connecting part at the end away from the insert, and the connecting part is used to connect with the displacement sensor.

7. The displacement sensor fixing device for structural crack monitoring according to claim 6, characterized by, The connecting part includes a threaded hole section disposed at one end of the pivot rod and a screw section disposed at the top of the threaded hole section, wherein the central axis of the threaded hole section intersects the central axis of the screw section.

8. The displacement sensor fixture for structural crack monitoring of claim 5, wherein, The limiting cavity is a circular cavity, and the limiting cavity is adapted to the outer contour of the insert.

9. The displacement sensor fixture for structural crack monitoring of claim 1, wherein, The magnetic suction part has a through hole along the thickness direction of the first base, and the through hole is used for mounting and fixing the first base.

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