House anti-seismic monitoring test device

Abstract

The invention discloses a house anti-seismic monitoring test device, and relates to the technical field of anti-seismic monitoring, the house anti-seismic monitoring test device comprises a base, four corners of the bottom of the base are fixedly connected with supporting members, the tops of the supporting members are fixedly connected with a mounting platform, and the house anti-seismic monitoring test device comprises a vertical and horizontal switching mechanism and a superposition rotating mechanism. The vertical and horizontal switching mechanism is located on one side of the bottom of the mounting platform, the stacking rotating mechanism is located on the other side of the bottom of the mounting platform, the vertical and horizontal switching mechanism comprises a parallelogram frame, and the top of the parallelogram frame is fixedly connected to the bottom of the mounting platform. The effect of freely switching the vibration direction of the mounting platform in the transverse direction and the longitudinal direction of the horizontal plane is achieved, the purpose that a single driving device drives the mounting platform to vibrate in different directions is achieved, the situation that the amplitudes in different directions are inconsistent is avoided, and the anti-seismic accuracy of a house is improved.

Description

Technical Field

[0001] This invention relates to the field of seismic monitoring technology, specifically to a building seismic monitoring test device. Background Technology

[0002] The building seismic monitoring test device is used to test the seismic performance of building structures during an earthquake. Its main working principle is to apply different degrees of vibration load to the building structure, and then monitor the dynamic response of the building structure through sensors and data acquisition systems, including parameters such as displacement, acceleration, and strain, thereby evaluating the seismic performance of the building structure.

[0003] In existing technologies, building seismic monitoring devices typically place a constructed building model on a shaking table. By moving the shaking table back and forth in multiple directions, the shaking of the building structure is simulated by an earthquake. Various types of sensors installed at different locations on the building structure collect various data. However, when switching between vibrations in different directions, the driving equipment also needs to be switched. Therefore, the parameters of the new equipment need to be readjusted to find the corresponding amplitude, making the test process cumbersome. Inconsistent amplitudes in different directions may occur, resulting in inaccurate test results.

[0004] Furthermore, the vibration direction of an earthquake is generated along the direction of seismic wave propagation. Seismic waves include longitudinal waves, transverse waves, and surface waves, which correspondingly cause vertical, horizontal, and rotational vibrations of the ground. Ultimately, multiple vibrations may superimpose on the building structure. Therefore, earthquake monitoring devices usually need to have multiple drive sources, such as electromagnetic or hydraulic drives. However, since multiple sensors are distributed within the building structure to be monitored, signal interference may occur between the data acquisition system for the sensors and the control system for the drive equipment due to the large number of devices in each system, resulting in data distortion or delayed response of the drive equipment.

[0005] Therefore, in view of this, the present invention proposes a building seismic monitoring test device to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a building seismic monitoring test device that can improve the accuracy of building seismic resistance, enhance the applicability of the device, and provide more comprehensive and accurate seismic monitoring data, thereby solving the corresponding technical problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a building seismic monitoring test device, including a base, with support members fixedly connected to the four corners of the bottom of the base, and an installation platform fixedly connected to the top of the support members. The building seismic monitoring test device includes: a longitudinal and transverse switching mechanism and a superimposed rotation mechanism. The longitudinal and transverse switching mechanism is located on one side of the bottom of the installation platform, and the superimposed rotation mechanism is located on the other side of the bottom of the installation platform.

[0008] The horizontal and vertical switching mechanism includes a parallelogram frame, the top of which is fixedly connected to the bottom of the installation platform, and the inner wall of the parallelogram frame is slidably connected to an L-shaped plate for pushing the installation platform to sway horizontally and vertically in the horizontal plane.

[0009] The superimposed rotation mechanism includes a rotating block for driving the installation platform to rotate together, and the top of the rotating block is fixedly connected to the center of the installation platform.

[0010] Preferably, the longitudinal and transverse switching mechanism further includes a fixed plate fixedly connected to the inner wall of the top of the base. An electric motor is fixedly connected to the bottom edge of the fixed plate, and a threaded column is fixedly connected to the output end of the electric motor. Straight plates are rotatably connected to both ends of the threaded column. The threaded column is fixedly connected to the outer surface of the fixed plate through the straight plates. An electric push rod is fixedly installed on the inner top surface of the fixed plate. The side of the L-shaped plate near the fixed plate is slidably connected to the output end of the electric push rod. A translation plate is fixedly connected to the bottom of the mounting platform. A plate groove adapted to the size of the L-shaped plate is opened in the middle of the translation plate.

[0011] Preferably, the longitudinal and transverse switching mechanism further includes a lifting rod threadedly connected to the middle of the threaded column. The side of the lifting rod away from the threaded column slides through the bottom of the fixed plate and the L-shaped plate respectively. The bottom of the fixed plate is provided with a groove that matches the size of the lifting rod.

[0012] Preferably, the stacking and rotating mechanism further includes a limiting rod fixedly connected to the inner wall of the middle part of the base. A second spring is fixedly connected to the middle part of the limiting rod. The end of the second spring away from the limiting rod is fixedly connected to the edge of the rotating block. Both sides of the outer wall of the rotating block are slidably connected to extrusion plates. The side of the two extrusion plates away from the rotating block is rotatably connected to the inner wall of the limiting rod.

[0013] Preferably, the stacking and rotating mechanism further includes a movable rod rotatably connected to the bottom of the L-shaped plate. An eccentric wheel is rotatably connected to the end of the movable rod away from the L-shaped plate. A protrusion is slidably connected to the inner wall of the eccentric wheel. A bolt is fixedly installed on the protrusion near the center of the eccentric wheel. The outer wall of the protrusion is slidably connected to the bottom of the rotating block. A support seat is rotatably connected to the center of the eccentric wheel. The eccentric wheel is fixedly connected to the bottom inner wall of the base through the support seat.

[0014] Preferably, the stacking and rotating mechanism further includes a trapezoidal plate slidably connected to the side of the extrusion plate near the limiting rod. A rotating rod is rotatably connected to the bottom of the trapezoidal plate. An N-shaped plate is fixedly connected to the end of the rotating rod away from the trapezoidal plate. A spring is fixedly connected to one side of the bottom of the rotating rod, and a bracket is rotatably connected to the other side of the bottom of the rotating rod. A connecting plate is fixedly connected to the bottom of the spring and the bracket.

[0015] Preferably, one side of the L-shaped plate fixing plate has a groove that matches the size of the output end of the electric actuator.

[0016] Preferably, the size and shape of the top of the L-shaped plate are adapted to the inner wall of the parallelogram frame.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. By setting up a longitudinal and transverse switching mechanism, the L-shaped plate can be moved up and down through the threaded column and lifting rod, so as to achieve the effect of arbitrarily switching the vibration direction of the installation platform in the horizontal and longitudinal directions. This enables a single drive device to drive the installation platform to vibrate in the horizontal and longitudinal directions, avoiding inconsistent amplitudes in different directions and improving the accuracy of building seismic monitoring.

[0019] 2. By setting up a superimposed rotation mechanism, the convex blocks rotate and intermittently squeeze the rotating blocks, achieving the effect of the installation platform reciprocating in the vertical direction. This allows the vertical vibration of the building structure to be superimposed when it vibrates horizontally. At the same time, the eccentric wheel can also drive the two extrusion plates to move closer to each other and squeeze the rotating blocks to make them rotate. Finally, when the building structure vibrates horizontally, it can also generate horizontal rotational vibration. This allows the drive source for vertical vibration and rotational vibration to be shared with the horizontal vibration, greatly reducing the number of drive devices used and avoiding signal interference that could lead to data distortion.

[0020] 3. By reciprocating the L-shaped plate, the installation platform is driven to vibrate in multiple directions. By utilizing the rapid response characteristics between structures, the response delay caused by multiple driving sources in current technologies can be avoided. This can provide more timely and accurate earthquake monitoring data, which is helpful for scientific research on earthquake characteristics and assessment of the seismic performance of building structures. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional cross-sectional view of the base shown in this invention;

[0023] Figure 3 This is a schematic diagram of the bottom structure of the installation platform shown in this invention;

[0024] Figure 4 As shown in this invention Figure 3 Enlarged structural diagram at point A;

[0025] Figure 5 This is a schematic diagram of the structure of the lifting rod connection shown in the present invention;

[0026] Figure 6 This is a schematic diagram of the eccentric wheel connection shown in the present invention;

[0027] Figure 7 As shown in this invention Figure 6 Enlarged structural diagram at point B;

[0028] Figure 8 This is a schematic diagram of the structure of the rotating block connection shown in the present invention.

[0029] The numbers on the map are:

[0030] 1. Mounting platform; 2. Base; 3. Supporting components;

[0031] 4. Horizontal / vertical switching mechanism; 41. Fixed plate; 42. Parallelogram frame; 43. Translation plate; 44. L-shaped plate; 45. Electric motor; 46. Lifting rod; 47. Threaded column;

[0032] 5. Stacked rotating mechanism; 51. Trapezoidal plate; 52. Eccentric wheel; 53. Movable rod; 54. Limiting rod; 55. Extrusion plate; 56. Rotating block; 57. Connecting plate; 58. Rotating rod; 59. Bracket; 510. Spring 1; 511. N-shaped plate; 512. Protrusion; 513. Bolt; 514. Spring 2. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Embodiments of the present invention

[0035] Please refer to Figures 1 to 8 As shown, the building seismic monitoring test device includes a base 2, with support members 3 fixedly connected to the four corners of the bottom of the base 2, and an installation platform 1 fixedly connected to the top of the support members 3. The building seismic monitoring test device includes a longitudinal and transverse switching mechanism 4 and a superimposed rotation mechanism 5. The longitudinal and transverse switching mechanism 4 is located on one side of the bottom of the installation platform 1, and the superimposed rotation mechanism 5 is located on the other side of the bottom of the installation platform 1.

[0036] The horizontal and vertical switching mechanism 4 includes a parallelogram frame 42, the top of which is fixedly connected to the bottom of the mounting platform 1, and an L-shaped plate 44 for pushing the mounting platform 1 to sway horizontally and vertically in the horizontal plane is slidably connected to the inner wall of the parallelogram frame 42.

[0037] The stacking rotation mechanism 5 includes a rotating block 56 for driving the mounting platform 1 to rotate together, and the top of the rotating block 56 is fixedly connected to the center of the mounting platform 1;

[0038] The longitudinal and transverse switching mechanism 4 also includes a fixed plate 41 fixedly connected to the inner wall of the top of the base 2. An electric motor 45 is fixedly connected to the bottom edge of the fixed plate 41. A threaded column 47 is fixedly connected to the output end of the electric motor 45. Straight plates are rotatably connected to both ends of the threaded column 47. The threaded column 47 is fixedly connected to the outer surface of the fixed plate 41 through the straight plates. An electric push rod is fixedly installed on the inner surface of the top of the fixed plate 41. The side of the L-shaped plate 44 near the fixed plate 41 is slidably connected to the output end of the electric push rod. A translation plate 43 is fixedly connected to the bottom of the mounting platform 1. A plate groove adapted to the size of the L-shaped plate 44 is opened in the middle of the translation plate 43.

[0039] The longitudinal and transverse switching mechanism 4 also includes a lifting rod 46 threadedly connected to the middle of the threaded column 47. The side of the lifting rod 46 away from the threaded column 47 slides through the bottom of the fixed plate 41 and the L-shaped plate 44 respectively. The bottom of the fixed plate 41 is provided with a sliding groove that matches the size of the lifting rod 46.

[0040] The L-shaped plate 44 and the fixing plate 41 have a groove on one side that matches the size of the output end of the electric actuator.

[0041] The size and shape of the top of the L-shaped plate 44 are adapted to the inner wall of the parallelogram frame 42;

[0042] Among them: the top of the installation platform 1 is fixedly connected with multiple installation rivets for installing the house model; the support 3 mainly consists of a spiral spring and a column sleeve, which is used to buffer and support the installation platform 1 and the house model on top; the output end of the electric push rod slides through the middle of the fixed plate 41; the electric motor 45 and the electric push rod are electrically connected to the external control system; the edge of the L-shaped plate 44 is set to be inclined relative to the base 2.

[0043] The effects achieved by this embodiment are as follows: In the prior art, the building seismic monitoring device usually moves the building to be tested back and forth and left and right to simulate the shaking of the building during an earthquake. However, when switching vibrations in different directions, it is also necessary to switch the driving device. Therefore, it is necessary to readjust the parameters of the new device to find the corresponding amplitude. However, the amplitudes in different directions may be inconsistent, resulting in inaccurate test results. Compared with the prior art, through the implementation of this embodiment, the longitudinal and transverse switching mechanism 4 can drive the L-shaped plate 44 to move up and down through the threaded column 47 and the lifting rod 46. The upper part is limited by the parallelogram frame 42, and the lower part slides to the middle of the translation plate 43. With the use of the electric push rod, the vibration direction of the installation platform 1 can be switched arbitrarily in the horizontal and longitudinal directions on the horizontal plane. This achieves the purpose of a single driving device driving the installation platform 1 to vibrate in different directions, avoiding the need to readjust the parameters and improving the accuracy of the test.

[0044] Further examples:

[0045] Please refer to Figure 2 , Figure 6 , Figure 7 , Figure 8 As shown, the stacking and rotating mechanism 5 also includes a limiting rod 54 fixedly connected to the inner wall of the middle part of the base 2. A second spring 514 is fixedly connected to the middle part of the limiting rod 54. The end of the second spring 514 away from the limiting rod 54 is fixedly connected to the edge of the rotating block 56. Both sides of the outer wall of the rotating block 56 are slidably connected to the extrusion plates 55. The side of the two extrusion plates 55 away from the rotating block 56 is rotatably connected to the inner wall of the limiting rod 54.

[0046] The stacking and rotating mechanism 5 also includes a movable rod 53 rotatably connected to the bottom of the L-shaped plate 44. An eccentric wheel 52 is rotatably connected to the end of the movable rod 53 away from the L-shaped plate 44. A protrusion 512 is slidably connected to the inner wall of the eccentric wheel 52. A bolt 513 is fixedly installed on the protrusion 512 near the center of the eccentric wheel 52. The outer wall of the protrusion 512 is slidably connected to the bottom of the rotating block 56. A support seat is rotatably connected to the center of the eccentric wheel 52. The eccentric wheel 52 is fixedly connected to the bottom inner wall of the base 2 through the support seat.

[0047] The stacking and rotating mechanism 5 also includes a trapezoidal plate 51 that is slidably connected to the side of the extrusion plate 55 near the limiting rod 54. A rotating rod 58 is rotatably connected to the bottom of the trapezoidal plate 51. An N-shaped plate 511 is fixedly connected to the end of the rotating rod 58 away from the trapezoidal plate 51. A spring 510 is fixedly connected to one side of the bottom of the rotating rod 58. A bracket 59 is rotatably connected to the other side of the bottom of the rotating rod 58. A connecting plate 57 is fixedly connected to the bottom of the spring 510 and the bracket 59.

[0048] Bolt 513 mainly includes a screw and a nut. The screw slides through the eccentric wheel 52 and is fixedly connected to the outer wall of the protrusion 512. The end of the screw away from the protrusion 512 is threaded with a nut. By loosening the nut, the screw can be pushed to move the protrusion 512. Then, the nut can be tightened to fix the position of the protrusion 512. Therefore, bolt 513 is used to adjust the length of the protrusion 512 extending out of the eccentric wheel 52. The protrusion 512 is located on the eccentric wheel 52 near the movable rod 53. The bottom of the connecting plate 57 is fixedly connected to the base 2. The movable rod 53 slides intermittently on the top of the N-shaped plate 511.

[0049] The effects achieved by this embodiment are as follows: In the prior art, the vibration or rotational force generated by an earthquake is transmitted to the building through the ground. However, most existing test devices only provide horizontal vibration and can usually only record information such as the amplitude and frequency of seismic waves. They lack the function of vertical and rotational vibration, resulting in insufficient data on additional information such as the direction of seismic wave propagation and vibration, and limited applicability. Compared with the prior art, this embodiment, by setting up a superimposed rotation mechanism 5, can achieve the effect of vertical reciprocating lifting of the installation platform 1 by intermittently squeezing the rotating block 56 through the rotation of the protrusion 512, and achieve the effect of horizontal reciprocating rotation of the installation platform 1 by intermittently squeezing the rotating block 56 through the squeezing plate 55. This allows the building structure located on top of the installation platform 1 to vibrate with the vertical and rotational vibration of the installation platform 1, thereby obtaining more comprehensive and diverse earthquake monitoring data and increasing the scope of application of the device.

[0050] The complete usage steps and working principle of the above embodiments are as follows:

[0051] In the initial state: the lifting rod 46 is located at the bottom of the threaded column 47, the L-shaped plate 44 is flush with the translation plate 43, the electric motor 45 and the electric push rod are in the closed state, the movable rod 53 and the protrusion 512 are both located at the top of the eccentric wheel 52, the output end of the electric push rod is located at the top of the L-shaped plate 44, the rotating rod 58 is in the horizontal state, the pressing plate 55 is located at the top of the trapezoidal plate 51, and the springs 510, 514 and the helical springs in the support member 3 are all in a naturally relaxed state.

[0052] The following describes the working process of how a single drive device of the longitudinal and transverse switching mechanism 4 drives the mounting platform 1 to vibrate in different directions, thereby improving the accuracy of the test:

[0053] In use, the house structure to be tested is first fixed to the top of the mounting platform 1 using the mounting rivets. The helical spring in the support 3 is then compressed. If the house structure needs to be tested under longitudinal vibration, the electric motor 45 must be started by the external control system to drive the threaded column 47 to rotate. The threaded column 47 then drives the lifting rod 46 to move from the initial state toward the top of the threaded column 47. Because the side of the lifting rod 46 away from the fixed plate 41 passes through the L-shaped plate 44, the movement of the lifting rod 46 synchronously drives the L-shaped plate 44 to move upward until the top of the L-shaped plate 44 is reached. The electric actuator is engaged with the inner wall of the parallelogram frame 42. Since the output end of the electric actuator is slidably connected to the outer wall of the L-shaped plate 44, the output end of the electric actuator slides down from its initial state to the bottom of the L-shaped plate 44. Then, the external control system starts the electric actuator to reciprocate, causing the L-shaped plate 44 to move synchronously. Because the parallelogram frame 42 engages and limits the L-shaped plate 44, and because the parallelogram frame 42 is fixedly connected to the mounting platform 1, the mounting platform 1 will reciprocate simultaneously with the electric actuator. The increased frequency of the electric actuator's extension and retraction generates vibration, and the direction of the vibration is... The electric actuators vibrate in the same direction, i.e., horizontal longitudinal vibration. Finally, the building structure located on top of the installation platform 1 achieves longitudinal vibration. At this time, data can be collected by various monitoring devices installed in the building structure and transmitted to the external control system. If it is necessary to detect the building structure under horizontal vibration, the electric actuators need to be paused. Similarly, the electric motor 45 is started and operated in reverse, so that the lifting rod 46 returns to its initial state. The top of the L-shaped plate 44 descends to its initial state and engages in the groove of the translation plate 43, disengaging from the limit of the parallelogram frame 42. Then, the electric actuators are started to reciprocate longitudinally. After pushing the L-shaped plate 44, the L-shaped plate 44 will slide longitudinally back and forth in the groove of the sliding plate 43. Since the sliding plate 43 is fixedly connected to the mounting platform 1, and the edge of the L-shaped plate 44 is set to be inclined relative to the base 2, the longitudinal reciprocating movement of the L-shaped plate 44 will drive the sliding plate 43 to move laterally back and forth along the inclined surface of the L-shaped plate 44, thereby increasing the frequency to achieve lateral vibration and switching the vibration direction. This achieves the effect of arbitrarily switching the vibration direction of the mounting platform 1 in the horizontal and longitudinal directions, and realizes the purpose of a single drive device driving the mounting platform 1 to vibrate in different directions.

[0054] Please refer to the above work process. Figures 1 to 5 .

[0055] The following describes the working process of the superimposed rotating mechanism 5 to add vertical and rotational vibrations, thereby obtaining more comprehensive and diverse monitoring data:

[0056] Furthermore, whenever the L-shaped plate 44 moves back and forth, it simultaneously drives one side of the movable rod 53 to move back and forth. Since the other side of the movable rod 53 is rotatably connected to the edge of the eccentric wheel 52, when the movable rod 53 is pushed by the L-shaped plate 44 and moves in the direction of the eccentric wheel 52, the end of the movable rod 53 and the protrusion 512 both rotate clockwise from the initial state following the eccentric wheel 52. Each time the protrusion 512 rotates, it will press the rotating block 56 upward once. This process repeats, and the mounting platform 1 fixed to the rotating block 56 will be intermittently pressed upward by the protrusion 512, forming vertical up-and-down vibrations on the building structure. Therefore, this up-and-down vibration can be superimposed with the lateral or longitudinal vibrations, effectively simulating the direction of seismic waves and avoiding the use of new driving sources.

[0057] Furthermore, since the protrusion 512 itself has a certain weight, the centrifugal force during rotation will assist the eccentric wheel 52 to continuously rotate clockwise. By using bolts 513, the protrusion 512 can be extended to different lengths before the device is operated, adjusting the amplitude of the vertical vibration. During the clockwise rotation of the eccentric wheel 52, the connection between the movable rod 53 and the eccentric wheel 52 will also rotate clockwise. Whenever the end of the movable rod 53 rotates to the N-shaped plate 511, due to the certain thickness of the movable rod 53, the movable rod 512... The end of 3 will press the N-shaped plate 511 downwards, and the N-shaped plate 511 will drive the rotating rod 58 to simultaneously compress the spring 510 downwards. Therefore, the rotating rod 58 will rotate counterclockwise around the bracket 59. The connecting plate 57 serves as the connecting base at the bottom of the rotating rod 58, increasing its stability. The end of the rotating rod 58 away from the N-shaped plate 511 will compress the trapezoidal plate 51 upwards. Due to the trapezoidal shape of the trapezoidal plate 51 (narrower at the top and wider at the bottom), the upward movement of the trapezoidal plate 51 will compress the two pressing plates 55 away from the rotating block 56, causing them to move away from each other. Furthermore, due to... The compression plate 55 is rotatably connected to the limiting rod 54. Through the lever principle, the two compression plates 55 can move closer to each other on the side near the rotating block 56. The two compression plates 55 move closer to each other and squeeze the rotating block 56, causing it to rotate. This, in turn, drives the mounting platform 1 fixed to the top of the rotating block 56 to rotate synchronously. At this time, the second spring 514 is in a compression state. When the end of the movable rod 53 rotates away and no longer squeezes the N-shaped plate 511, the elastic force of the first spring 510 and the second spring 514 can restore each structure to its initial state. By repeating this process, the mounting platform 1 and the building structure can achieve the effect of horizontal rotational vibration. The rotational amplitude is less than 90 degrees. In reality, the amplitude of the seismic rotational wave may be weakened due to factors such as the distance from the epicenter, geological conditions, and fault characteristics. Therefore, the rotational amplitude is usually not too large. Furthermore, the rotational vibration can be superimposed on the lateral or longitudinal vibration, making the vibration experienced by the building structure on the mounting platform 1 more consistent with the actual situation. This allows for the acquisition of more comprehensive and diverse seismic monitoring data, making the device more applicable.

[0058] Please refer to the above work process. Figure 2 and Figures 6 to 8 .

[0059] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

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

Claims

1. A building seismic monitoring test device, comprising a base (2), wherein support members (3) are fixedly connected to the four corners of the bottom of the base (2), and an installation platform (1) is fixedly connected to the top of the support members (3), characterized in that, The building seismic monitoring test device includes: a longitudinal and transverse switching mechanism (4) and a superimposed rotation mechanism (5). The longitudinal and transverse switching mechanism (4) is located on one side of the bottom of the installation platform (1), and the superimposed rotation mechanism (5) is located on the other side of the bottom of the installation platform (1). The longitudinal and transverse switching mechanism (4) includes a parallelogram frame (42), the top of which is fixedly connected to the bottom of the installation platform (1), and the inner wall of the parallelogram frame (42) is slidably connected to an L-shaped plate (44) for pushing the installation platform (1) to sway laterally and longitudinally in the horizontal plane. The superimposed rotation mechanism (5) includes a rotating block (56) for driving the installation platform (1) to rotate together, and the top of the rotating block (56) is fixedly connected to the center of the installation platform (1).

2. The building seismic monitoring test device according to claim 1, characterized in that, The longitudinal and transverse switching mechanism (4) also includes a fixed plate (41) fixedly connected to the inner wall of the top of the base (2). An electric motor (45) is fixedly connected to the bottom edge of the fixed plate (41). A threaded column (47) is fixedly connected to the output end of the electric motor (45). Straight plates are rotatably connected to both ends of the threaded column (47). The threaded column (47) is fixedly connected to the outer surface of the fixed plate (41) through the straight plates. An electric push rod is fixedly installed on the inner surface of the top of the fixed plate (41). The side of the L-shaped plate (44) close to the fixed plate (41) is slidably connected to the output end of the electric push rod. A translation plate (43) is fixedly connected to the bottom of the mounting platform (1). A plate groove adapted to the size of the L-shaped plate (44) is opened in the middle of the translation plate (43).

3. The building seismic monitoring test device according to claim 2, characterized in that, The longitudinal and transverse switching mechanism (4) also includes a lifting rod (46) threadedly connected to the middle of the threaded column (47). The lifting rod (46) slides through the bottom of the fixed plate (41) and the L-shaped plate (44) on the side away from the threaded column (47). The bottom of the fixed plate (41) is provided with a groove that matches the size of the lifting rod (46).

4. The building seismic monitoring test device according to claim 1, characterized in that, The superimposed rotation mechanism (5) also includes a limiting rod (54) fixedly connected to the inner wall of the middle part of the base (2). A second spring (514) is fixedly connected to the middle part of the limiting rod (54). The end of the second spring (514) away from the limiting rod (54) is fixedly connected to the edge of the rotating block (56). Both sides of the outer wall of the rotating block (56) are slidably connected to the extrusion plate (55). The side of the two extrusion plates (55) away from the rotating block (56) is rotatably connected to the inner wall of the limiting rod (54).

5. The building seismic monitoring test device according to claim 1, characterized in that, The superimposed rotation mechanism (5) also includes a movable rod (53) rotatably connected to the bottom of the L-shaped plate (44). An eccentric wheel (52) is rotatably connected to one end of the movable rod (53) away from the L-shaped plate (44). A protrusion (512) is slidably connected to the inner wall of the eccentric wheel (52). A bolt (513) is fixedly installed on the protrusion (512) near the center of the eccentric wheel (52). The outer wall of the protrusion (512) is slidably connected to the bottom of the rotating block (56). A support seat is rotatably connected to the center of the eccentric wheel (52). The eccentric wheel (52) is fixedly connected to the bottom inner wall of the base (2) through the support seat.

6. The building seismic monitoring test device according to claim 4, characterized in that, The superimposed rotation mechanism (5) further includes a trapezoidal plate (51) slidably connected to the side of the extrusion plate (55) near the limiting rod (54). A rotating rod (58) is rotatably connected to the bottom of the trapezoidal plate (51). An N-shaped plate (511) is fixedly connected to one end of the rotating rod (58) away from the trapezoidal plate (51). A spring (510) is fixedly connected to one side of the bottom of the rotating rod (58). A bracket (59) is rotatably connected to the other side of the bottom of the rotating rod (58). A connecting plate (57) is fixedly connected to the bottom of the spring (510) and the bracket (59).

7. The building seismic monitoring test device according to claim 1, characterized in that, The L-shaped plate (44) fixing plate (41) has a groove on one side that matches the size of the output end of the electric actuator.

8. The building seismic monitoring test device according to claim 1, characterized in that, The size and shape of the top of the L-shaped plate (44) are adapted to the inner wall of the parallelogram frame (42).

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