A seismic displacement recording device

Abstract

This utility model provides a seismic displacement recording device, comprising: a base, a recording plate, a pin assembly, and a recorder assembly; the base is connected to the recording plate via a fixing column; the pin assembly includes a mounting column, an elastic element, and a pin, the mounting column is mounted on a building column, and the mounting column is connected to the pin via the elastic element, the tip of the pin contacting the surface of the recording plate; the recorder assembly includes a pull rope sensor and a rotation angle sensor, the pull rope of the pull rope sensor passes through a threaded post and connects to the tip of the pin, and the sensing end of the rotation angle sensor is connected to the threaded post. The device of this application is not easily affected by environmental factors, can provide long-term stable and reliable monitoring, and has a simple structure, is easy and quick to install, and is highly practical.

Description

Technical Field

[0001] This utility model relates to the field of earthquake observation technology, and in particular to an earthquake displacement recording device. Background Technology

[0002] As core infrastructure of modern cities, the post-disaster structural safety of high-rise buildings is directly related to public safety and social operation. Especially in areas prone to strong earthquakes, the extreme loads caused by rare earthquakes can easily lead to irreversible damage to high-rise buildings. Rapid and accurate assessment of post-earthquake damage is of great significance for emergency rescue decisions and the restoration of urban functions. Current technologies for monitoring horizontal displacement in high-rise buildings are susceptible to interference from environmental factors such as light, weather, and electromagnetic fields, resulting in low reliability. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose a seismic displacement recording device.

[0004] To achieve the above objectives, this utility model provides a seismic displacement recording device, comprising: a base, a recording plate, a pin assembly, and a recorder assembly;

[0005] The base is connected to the recording plate via a fixing post;

[0006] The ejector pin assembly includes a mounting post, an elastic element, and an ejector pin. The mounting post is mounted on a building column, and the mounting post is connected to the ejector pin through the elastic element. The tip of the ejector pin contacts the surface of the recording plate.

[0007] The recorder assembly includes a pull cord sensor and a rotation angle sensor. The pull cord of the pull cord sensor passes through a threaded post and is connected to the tip of the pin. The sensing end of the rotation angle sensor is connected to the threaded post.

[0008] Optionally, the recorder component further includes:

[0009] A bearing pulley is connected to a sensor mounting plate via a steering column. The pull rope sensor is mounted on the sensor mounting plate, and the pull rope passes through the threaded post after being turned by the bearing pulley.

[0010] Optionally, the threaded post is connected to the sensor fixing plate via a bearing and a support shaft.

[0011] Optionally, the threading post is connected to the guide post, and the guiding direction of the guide post corresponds to that of the ejector pin.

[0012] Optionally, the rotation angle sensor is connected to the sensor mounting plate via a support frame.

[0013] Optionally, the sensor mounting plate is connected to the recording plate via a mounting base plate, and the mounting base plate is provided with a battery module and a circuit board.

[0014] Optionally, the ejector pin assembly further includes:

[0015] A sleeve is provided, the mounting post is connected to the sleeve, the shank of the ejector pin passes through one end of the sleeve, the elastic element is located inside the sleeve, one end of the clamping bolt clamps the shank of the ejector pin through the elastic element, and the other end of the clamping bolt passes through the other end of the sleeve.

[0016] Optionally, one side of the base is connected to the recording plate via a fixing post and a leveling stud, and the other side of the base is installed on the foundation.

[0017] Optionally, the fixing post includes a first fixing post and a second fixing post, the first fixing post being connected to the recording plate and the second fixing post being connected to the base; the first threaded end of the leveling screw is connected to the first fixing post, and the second threaded end of the leveling screw is connected to the second fixing post. When the leveling screw is rotated in a first direction, the first fixing post and the second fixing post move closer to each other; when the leveling screw is rotated in a second direction, the first fixing post and the second fixing post move further apart from each other.

[0018] Optionally, the recording plate is provided with a plurality of scale lines, and the spacing between two adjacent scale lines is 25mm.

[0019] As described above, the seismic displacement recording device provided by this utility model includes a base, a recording plate, a pin assembly, and a recorder assembly. The base is connected to the recording plate via a fixing column. The mounting column is installed on a building column and connected to the pin via an elastic element. The tip of the pin contacts the surface of the recording plate. The pull rope of the pull rope sensor passes through a threaded post and connects to the tip of the pin. The sensing end of the rotation angle sensor is connected to the threaded post. The recorder assembly can record the displacement and rotation angle of the pin. The device of this application is not easily affected by environmental factors, can provide long-term stable and reliable monitoring, and has a simple structure, is easy and quick to install, and is highly practical. Attached Figure Description

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

[0021] Figure 1This is a schematic diagram of the overall structure of the device according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the ejector pin assembly structure according to an embodiment of the present utility model;

[0023] Figures 3A-3C This is a schematic diagram of the leveling process of the leveling stud in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the recorder component structure according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the sensor assembly structure according to an embodiment of the present utility model;

[0026] Figure 6 This is a partial structural schematic diagram of the sensor assembly according to an embodiment of the present utility model;

[0027] Figure 7 This is a partial structural schematic diagram of a sensor assembly according to another embodiment of the present invention;

[0028] Figure 8 This is a partial structural diagram of the ejector pin according to an embodiment of the present utility model;

[0029] Figure 9 This is a schematic diagram illustrating the displacement and angle conversion principle of one embodiment;

[0030] Figure 10 This is a schematic diagram illustrating the displacement and angle conversion principle of another embodiment. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Among related technologies, methods for monitoring horizontal displacement of high-rise buildings are affected by environmental factors and have low reliability. For example, GPS positioning technology is affected by multipath interference and can only obtain centimeter-level displacement data of the building top, with a data accuracy of greater than or equal to 15mm; computer vision methods have a sharp drop in accuracy under changing lighting conditions and long-distance working conditions, and the calibration process is complicated; laser projection methods fail in rainy and foggy environments, have low scanning efficiency, and high equipment costs.

[0034] In view of this, this application provides a seismic displacement recording device, including a recording plate, a pin assembly, and a recorder assembly. The pin assembly is connected to a building column, and the pin is in close contact with the recording plate. When the building column moves, the pin can record a mark on the recording plate, and the recorder assembly records the distance and angle of the pin's displacement for subsequent analysis. The monitoring process of the device is not easily affected by environmental factors and can provide long-term stable and reliable monitoring.

[0035] The technical solution of this application will be further described in detail below through specific embodiments.

[0036] like Figure 1 As shown, this application provides a seismic displacement recording device, including: a base 1, a recording plate 3, a pin assembly, and a recorder assembly;

[0037] The base 1 is connected to the recording plate 3 via a fixed post;

[0038] The ejector pin assembly includes a mounting post 7, an elastic element, and an ejector pin 5. The mounting post 7 is mounted on a building column and is connected to the ejector pin 5 through the elastic element. The tip of the ejector pin contacts the surface of the recording plate 3.

[0039] The recorder assembly 13 includes a pull cord sensor 27 and a rotation angle sensor 19. The pull cord 14 of the pull cord sensor 27 passes through the threaded post 21 and is connected to the tip of the pin. The sensing end of the rotation angle sensor 19 is connected to the threaded post 21.

[0040] The seismic displacement recording device provided in this embodiment has a base 1 mounted on the foundation using expansion bolts. The upper side of the base 1 is fixedly connected to the recording plate 3 via a fixing column. The mounting column 7 of the pin assembly is fixedly connected to the building column. The mounting column 7 is connected to the pin 5 via an elastic element. The tip of the pin 5 contacts the surface of the recording plate 3. A pull rope from a pull rope sensor 27 is threaded through the tip of the pin 5. The threading post 21 through which the pull rope is threaded is connected to the sensing end of a rotation angle sensor 19. During an earthquake, the building column shifts, causing the pin 5 to move via the elastic element. The tip of the pin 5 leaves a mark on the recording plate 3 during this movement. Simultaneously, the pull rope sensor 27 records the displacement of the pin, and the rotation angle sensor records the rotation of the pin. Subsequently, based on the marks recorded on the recording plate, the displacement recorded by the sensors, and the rotation, the displacement and angle of the suspended building column relative to the foundation are analyzed and determined.

[0041] like Figure 2 As shown, in some embodiments, the ejector pin assembly further includes:

[0042] Sleeve 6, mounting post 7 is connected to sleeve 6, the shank of ejector pin passes through one end of sleeve 6, elastic element 11 is provided inside sleeve, one end of clamping bolt 12 clamps the shank of ejector pin through elastic element 11, and the other end of clamping bolt passes through the other end of sleeve 6.

[0043] In this embodiment, to improve reliability, the elastic element and the shank of the ejector pin are housed within the protective sleeve 6. Simultaneously, a clamping bolt 12 is used to press the elastic element, ensuring the tip of the ejector pin presses firmly against the surface of the recording plate, thus preventing recording errors. Specifically, the mounting post 7 is fixedly connected to the sleeve 6, and the fixing clamp 8 secures the sleeve 6 to the mounting post 7. The tip of the ejector pin protrudes through one end of the sleeve 6, and the shank of the ejector pin is held within the sleeve 6. The elastic element is housed within the sleeve 6. One end of the clamping member 12 presses the shank of the ejector pin through the elastic element 11, and the other end of the clamping member 12 protrudes through the sleeve cover 9 of the sleeve 6. The sleeve cover 9 is fixedly connected to the sleeve 6, and the clamping member 12 is threadedly connected to the sleeve cover 9. The ejector pin can be made of alloy steel. This mechanical ejector pin assembly can maintain its recording displacement trajectory even under extreme conditions such as strong electromagnetic interference or complete power failure, and is unaffected by environmental factors, exhibiting high reliability.

[0044] like Figure 3A , 3BAs shown in Figures 3C and 4, in some embodiments, one side of the base 1 is connected to the recording plate 3 via a fixing post and a leveling stud 4, while the other side of the base is mounted on a foundation. The fixing post includes a first fixing post 10 and a second fixing post 2. The first fixing post 10 is connected to the recording plate 3, and the second fixing post 2 is connected to the base 1. The first threaded end of the leveling stud 4 is connected to the first fixing post 10, and the second threaded end of the leveling stud 4 is connected to the second fixing post 2. Rotating the leveling stud in a first direction brings the first fixing post 10 and the second fixing post 2 closer together, while rotating the leveling stud 4 in a second direction moves the first fixing post 10 and the second fixing post 2 further apart.

[0045] In some designs, the base is triangular, and the three ends of the triangular base are connected to the recording plate 3 by fixing posts and leveling bolts 4 respectively. After the device is installed, the device can be easily and quickly adjusted to a horizontal state by leveling bolts 4, making installation convenient. By rotating the clamping bolt 12, the pin is made to make close contact with the surface of the recording plate 3, ensuring the reliability of the device.

[0046] In some embodiments, the recording plate has several equidistant scale lines, with a spacing of 25mm between any two adjacent scale lines, making it convenient to read the length of the scale line directly from the recording plate.

[0047] In some embodiments, the recorder component further includes:

[0048] The bearing pulley 29 is connected to the sensor mounting plate 20 via the steering column 28. The pull rope sensor 27 is mounted on the sensor mounting plate 20. The pull rope 14 passes through the threaded post 21 after being turned by the bearing pulley 29. The threaded post 21 is connected to the sensor mounting plate 20 via a bearing and a support shaft. The threaded post 24 is connected to the guide post 24, and the guiding direction of the guide post corresponds to that of the ejector pin.

[0049] like Figure 4-8 As shown, in this embodiment, the recorder assembly 13 includes a sensor assembly, which includes a sensor mounting plate 20. A pull-cord sensor 27 is mounted on the sensor mounting plate 20. The pull cord 14 of the pull cord sensor 27 changes direction after passing through a bearing pulley 29 and passes through a threaded post 21. The bottom surface of the bearing pulley 29 contacts the stepped surface of one end of the steering column 28 and is fixedly connected by a locking nut 30. The other end of the steering column 28 is fixedly mounted on the sensor mounting plate 20. The lower inner ring of the threaded post 21 is interference-fitted with the outer ring of the bearing 22. The inner ring of the bearing 22 is interference-fitted with the upper end of the support shaft 23. The lower end of the support shaft 23 is fixedly connected to the sensor mounting plate 20. One end of the threaded post 21 is fixedly connected to a guide post 24. The guiding direction of the guide post 24 is consistent with the direction of the ejector pin. After the pull cord 14 is guided by the bearing pulley 29, the threaded post 21, and the guide post 24, it passes through the central hole at the tip of the ejector pin and is tied to the ejector pin.

[0050] In some embodiments, the rotation angle sensor 19 is connected to the sensor fixing plate 20 via a support frame. Specifically, the rotation angle sensor 19 is fixed to the sensor fixing plate 20 via a connecting plate 26 and a support frame 25. The threaded post 21 and the middle hole of the rotation angle sensor 19 at its top are in clearance fit. When the rotation of the pull rope causes the threaded post 21 to rotate, the rotation angle sensor 19 rotates accordingly and senses the corresponding rotation angle.

[0051] In some embodiments, the sensor mounting plate 20 is connected to the recording plate 3 via a mounting base plate 17. A battery module 18 and a circuit board 15 are mounted on the mounting base plate 17. The recorder assembly 13 also includes a sealed housing, which is sealed to the mounting base plate 17 to seal the sensor assembly, battery module, circuit board, and other components within the housing, protecting each component. The battery module 18 is a lithium battery pack, which is fixed to the mounting base plate 17. The circuit board 15 is fixed to the mounting base plate 17 via a circuit board bracket 16 and bracket reinforcement strips 31. The circuit board is equipped with a main control chip, storage module, and other circuit units to ensure the normal operation of the pull rope sensor 27 and the rotation angle sensor 19. It collects and stores the displacement and angle data from the pull rope sensor and the rotation angle sensor, respectively, so that the displacement of the building column relative to the foundation can be obtained by processing the displacement and angle data.

[0052] like Figure 9 As shown, in some methods, displacement data collected by a pull-cord sensor and angle data collected by a rotation angle sensor can be converted to obtain the displacement and angle of the ejector pin. Specifically:

[0053] As the angle of the rotation angle sensor increases, let L0 be the initial length of the pull rope, and L1 be the length recorded by the pull rope sensor before the pin produces displacement; θ s1 L1 is the angle recorded by the rotation angle sensor before the ejector pin moves; L2 is the length recorded by the pull cord sensor after the ejector pin moves; θ s2 After the ejector pin is displaced, the angle recorded by the rotation angle sensor is the angle through which the ejector pin rotates; Ls indicates that the displacement of the ejector pin is from a to a`; θ2 is the angle between the direction of the pull rope and the direction of the actual displacement Ls before the ejector pin is displaced; θ2` is the direction angle of the actual displacement.

[0054] According to the law of cosines, the actual displacement Ls is:

[0055]

[0056] According to the law of sines, we can obtain:

[0057]

[0058] Therefore, the direction angle is:

[0059] θ2`-θ2-θ s1 (4)

[0060] Therefore, the displacement length of the pin is Ls, and the direction is the clockwise rotation angle θ2' with north as the reference direction, where the domain of θ2' is [-θ]. s1 , 180°-θ s1 The "-" symbol indicates a counter-clockwise direction.

[0061] like Figure 10 As shown, when the angle of the rotation angle sensor decreases, the direction angle can be obtained as follows:

[0062] θ2`=θ2+θ s1 (5)

[0063] Therefore, the displacement length of the pin is Ls, and the direction is a clockwise rotation of 360° - θ2` with north as the reference direction, where the domain of θ2` is [θ s1 ,180+θ s1 ].

[0064] In some methods, the displacement length calculated from the collected displacement and angle data is approximately equal to the scale length of the scratch read from the recording plate. Under normal use, the displacement length and direction angle of the pin can be obtained through mathematical processing based on the displacement and angle data recorded by the recorder, facilitating data recording and remote monitoring. In extreme cases such as strong electromagnetic interference or complete power failure, the purely mechanical pin assembly can still maintain the displacement trajectory of the recording pin, ensuring the reliability of data recording under extreme environments. The above methods for processing displacement and angle data all employ conventional mathematical methods; this embodiment does not improve the data processing methods.

[0065] The seismic displacement recording device provided in this application, during an earthquake, records the displacement traces of a building column on a recording plate using a mechanical pin assembly. This recording method is unaffected by environmental factors such as light and electromagnetic fields, ensuring high reliability. Simultaneously, a pull-rope sensor records the displacement amount of the pin, and a rotation angle sensor records the displacement angle. Subsequent data processing enables remote displacement monitoring. The device has a simple overall structure, is easy and quick to install, and provides long-term stable and reliable monitoring. It achieves a linear accuracy of 0.1% and an angular accuracy of 2%, significantly improving monitoring precision.

[0066] In some embodiments, the seismic displacement recording device provided in this application can be applied to nuclear power plants and substations. Its operating temperature range is extended to -40℃ to 80℃. It can maintain stable operation in environments such as rain, fog, and dust. It does not require external power supply or regular calibration, has low maintenance costs, and can still read displacement data through the recording plate when the power is interrupted.

[0067] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the scope of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0068] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A seismic displacement recording device, characterized in that, include: Base, recording plate, pin assembly, recorder assembly; The base is connected to the recording plate via a fixing post; The ejector pin assembly includes a mounting post, an elastic element, and an ejector pin. The mounting post is mounted on a building column, and the mounting post is connected to the ejector pin through the elastic element. The tip of the ejector pin contacts the surface of the recording plate. The recorder assembly includes a pull cord sensor and a rotation angle sensor. The pull cord of the pull cord sensor passes through a threaded post and is connected to the tip of the pin. The sensing end of the rotation angle sensor is connected to the threaded post.

2. The apparatus according to claim 1, characterized in that, The recorder component also includes: A bearing pulley is connected to a sensor mounting plate via a steering column. The pull rope sensor is mounted on the sensor mounting plate, and the pull rope passes through the threaded post after being turned by the bearing pulley.

3. The apparatus according to claim 2, characterized in that, The threaded post is connected to the sensor mounting plate via a bearing and a support shaft.

4. The apparatus according to claim 1, characterized in that, The threading post is connected to the guide post, and the guiding direction of the guide post corresponds to that of the ejector pin.

5. The apparatus according to claim 2, characterized in that, The rotation angle sensor is connected to the sensor mounting plate via a support frame.

6. The apparatus according to any one of claims 2, 3, and 5, characterized in that, The sensor mounting plate is connected to the recording plate via a mounting base plate, and the mounting base plate is provided with a battery module and a circuit board.

7. The apparatus according to claim 1, characterized in that, The ejector pin assembly also includes: A sleeve is provided, the mounting post is connected to the sleeve, the shank of the ejector pin passes through one end of the sleeve, the elastic element is located inside the sleeve, one end of the clamping bolt clamps the shank of the ejector pin through the elastic element, and the other end of the clamping bolt passes through the other end of the sleeve.

8. The apparatus according to claim 1, characterized in that, One side of the base is connected to the recording plate via a fixing post and a leveling stud, while the other side of the base is installed on the foundation.

9. The apparatus according to claim 8, characterized in that, The fixing post includes a first fixing post and a second fixing post. The first fixing post is connected to the recording plate, and the second fixing post is connected to the base. The first threaded end of the leveling screw is connected to the first fixing post, and the second threaded end of the leveling screw is connected to the second fixing post. When the leveling screw is rotated in a first direction, the first fixing post and the second fixing post move closer to each other. When the leveling screw is rotated in a second direction, the first fixing post and the second fixing post move further apart from each other.

10. The apparatus according to claim 1, characterized in that, The recording plate has several scale lines, and the distance between two adjacent scale lines is 25mm.

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