Raised floor seismic detection device

Abstract

The present invention relates to the field of seismic detection technology, specifically to an elevated floor seismic detection device, including a fixed disc seat, a moving disc seat, a universal drive assembly and a control system. The fixed disc seat is used to fix the overall structure of the device, and a tooling fixture is provided on the top of the moving disc seat to fix the elevated floor to be tested. The universal drive assembly includes a mover disc, a stator disc and a number of permanent magnets. The stator disc is provided with a U-shaped magnetic yoke body and symmetrically arranged coil windings. An alternating magnetic field is generated by passing an alternating current, and the mover disc is driven to generate high-frequency axial vibration and planar multi-directional vibration. The control system is used to adjust the current parameters of the coil winding to achieve vibration mode control, supporting modes such as uniaxial vibration, compound vibration and random vibration to meet the detection requirements of different earthquake conditions. The present invention adopts a flexible floating support design, combined with an efficient electromagnetic drive, and has the advantages of diverse vibration modes, high detection accuracy, low energy consumption, strong stability, etc., and can be widely used in the field of seismic performance detection of elevated floors.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake resistance detection, in particular to an earthquake resistance detection device for an elevated floor. Background Art

[0002] Raised floors are a common floor structure used in buildings, widely used in computer rooms, office buildings, and earthquake-prone areas. Their structure typically consists of a support system and panels. By suspending the floor, they provide space for equipment and cables or achieve a certain level of seismic resistance. However, with the increasing seismic resistance requirements for floors in modern buildings, existing technologies for testing the seismic performance of raised floors present the following challenges:

[0003] Single vibration mode: Existing seismic testing devices can usually only simulate vibration in a single direction, which makes it difficult to fully cover the testing needs of complex earthquake conditions, resulting in limitations in the evaluation results of the seismic performance of the floor.

[0004] Limited vibration parameter adjustment capability: The current equipment has a narrow adjustment range for parameters such as vibration frequency and amplitude, which cannot meet the diverse requirements of vibration intensity and frequency for different floor structures, affecting the accuracy of detection.

[0005] Poor adaptability of detection devices: Many existing detection equipment cannot flexibly adapt to raised floors of different specifications or materials, limiting their widespread application.

[0006] Low efficiency and reliability: Traditional mechanical vibration detection devices usually have problems such as slow response speed and unstable vibration. Long-term use may also cause equipment fatigue and damage, affecting detection efficiency and reliability.

[0007] Given the above issues, there is an urgent need for a detection device capable of multi-directional and multi-mode vibration simulation, meeting the requirements for seismic performance testing under complex earthquake conditions while also providing precise vibration parameter adjustment and broad adaptability. To this end, this invention proposes a raised floor seismic testing device. Leveraging the operating principle of an axial magnetic field motor, this device overcomes the shortcomings of existing technologies by precisely controlling vibration parameters, providing a new solution for comprehensive testing of raised floor seismic performance. Summary of the Invention

[0008] The present invention aims to solve the problems of insufficient seismic detection accuracy of raised floors, single vibration mode and high energy consumption in the prior art, and provides an efficient, accurate and multifunctional seismic detection device for raised floors.

[0009] To this end, the technical solution adopted by the present invention is: a seismic detection device for a raised floor, comprising:

[0010] The fixed plate seat is used to fix the overall structure of the device. A number of positioning ears are provided on the periphery of the fixed plate seat, and a support column is provided on the top surface of the fixed plate seat;

[0011] The bottom surface of the movable plate seat is provided with an airbag column head and a ball bearing cover, the ball bearing cover is connected to the surface of the support column to realize floating support, and the top is provided with a fixture for fixing the elevated floor to be tested;

[0012] A universal drive assembly includes a mover disc, a stator disc, and several permanent magnets. A retainer disc is fixedly mounted on the top surface of the mover disc. The mover disc and the stator disc are arranged in parallel with a gap in between. The stator disc includes several U-shaped magnetic yokes, each of which has symmetrical coil windings arranged on both sides to generate an alternating magnetic field.

[0013] The control system is electrically connected to the stator disk and is used to control the mover disk to generate axial high-frequency vibration and planar multi-directional vibration by adjusting the coil winding current parameters in the stator disk.

[0014] In a possible implementation, a plurality of permanent magnets are provided on the surface of the mover disc. The permanent magnets are evenly distributed in a circumferential direction to enhance the intensity of the magnetic field of the vibration.

[0015] In a possible implementation manner, the airbag column head is arranged between the fixed disc seat and the movable disc seat to provide floating support and vibration buffering.

[0016] In a possible implementation, the control system achieves high-frequency axial vibration and planar multi-directional vibration of the mover disc by adjusting the current frequency and phase of the coil winding.

[0017] In one possible embodiment, the bottom surface of the ball cover is provided with a hemispherical groove adapted to the top of the support head column, and a gap is provided between the bottom surface of the hemispherical groove and the surface of the support head column. The bottom of the movable disk seat is in contact with the support head column through the ball cover to provide elastic support during vibration.

[0018] In a possible implementation, the fixture is used to fix the elevated floor to be tested, and the simulated vibration is applied to the floor through the vibration of the moving plate seat.

[0019] In one possible embodiment, the control system supports multiple vibration modes, including uniaxial vibration, composite vibration and random vibration, which are suitable for simulating different earthquake conditions; axial high-frequency vibration is achieved by passing an alternating current through the coil winding and using the axial magnetic field to drive the mover disk to generate high-frequency reciprocating vibration; planar multi-directional vibration is achieved by regulating the current phase and frequency in the coil winding to form a complex multi-directional vibration in the horizontal plane to simulate various earthquake resistance scenarios.

[0020] In one possible embodiment, the coil winding uses a wire material that is resistant to high-frequency current, and the gap size between the mover disk and the stator disk can be adjusted to achieve optimized magnetic field coupling. In addition, for the vibration movement of the mover disk, the gap is larger than the movement amplitude of the mover disk.

[0021] Based on the above technical solution, the present invention's raised floor seismic testing device, through its flexible floating support design and efficient electromagnetic drive, can accurately simulate a variety of earthquake conditions, adapting to seismic testing needs in diverse scenarios. This device offers diverse vibration patterns, low energy consumption, high stability, and high testing efficiency, contributing to improved testing of the seismic performance of raised floors.

[0022] The beneficial effects achieved by the present invention are:

[0023] 1. In the present invention, by adjusting the current parameters of the coil winding through the control system, high-frequency axial vibration and planar multi-directional vibration of the mover disk can be achieved, and various vibration modes such as uniaxial vibration, composite vibration and random vibration can be simulated, which is suitable for seismic detection needs under different earthquake conditions.

[0024] 2. The control system in the present invention supports adjusting the frequency and amplitude of the winding current, and can dynamically adjust the vibration intensity to meet the needs of different detection objects and working conditions. The mover disk adopts a radially distributed permanent magnet design, combined with the U-shaped magnetic yoke and symmetrical winding of the stator disk to achieve efficient electromagnetic drive effect and high vibration stability. Compared with traditional mechanical vibration methods, it has lower energy consumption, and the vibration mode switches quickly and responds sensitively.

[0025] 3. In the present invention, the movable disc seat adopts a floating support structure. Through the design of the airbag column head and the elastic ball cover, the vibration transmission is made more flexible, the interference is reduced, and the detection accuracy and efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a moving disc seat and a universal drive assembly according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the exploded structure of a universal drive assembly according to one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the surface structure of the movable disc seat according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic structural diagram of a mover disc and a stator disc according to an embodiment of the present invention;

[0031] Figure 6The figure is a schematic diagram of the yoke and coil winding structure of an embodiment of the present invention.

[0032] Reference numerals:

[0033] 100, fixed plate seat; 110, positioning ear; 120, support column;

[0034] 200, moving disc seat; 210, fixture; 220, airbag column head; 230, ball bearing cover;

[0035] 300, universal drive assembly; 310, mover disc; 320, stator disc; 330, permanent magnet; 311, retaining disc; 321, yoke body; 322, coil winding. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0037] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0038] A seismic detection device for a raised floor provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0039] Combine Figures 1 to 6 As shown, the present invention provides an elevated floor anti-seismic detection device, which includes a fixed plate base 100, a movable plate base 200, a universal drive assembly 300 and a control system.

[0040] 1. Structure of fixed plate 100

[0041] The fixed disc seat 100 is used to fix the overall structure of the device. A number of positioning ears 110 are provided on its periphery. A support column 120 is provided on the top of the fixed disc seat 100. The top of the support column 120 is used to contact the ball cover 230 of the movable disc seat 200, thereby realizing floating support and providing support force for the vibration process.

[0042] 2. Structure of the moving disc seat 200

[0043] The movable disc seat 200 is floatingly supported by the airbag column head 220 and the support column 120. The airbag column head 220 is installed between the fixed disc seat 100 and the movable disc seat 200 to provide vibration buffering and support stability.

[0044] A fixture 210 is provided on top of the movable plate base 200 for fixing the elevated floor to be tested. The fixture 210 can apply simulated vibration to the floor to be tested through the vibration of the movable plate base 200, thereby realizing seismic testing of earthquake conditions.

[0045] The bottom of the movable disc seat 200 contacts the support post 120 through the ball cover 230. The bottom surface of the ball cover 230 is provided with a hemispherical groove that matches the top of the support post 120. There is a gap between the bottom surface of the hemispherical groove and the surface of the support post 120 to ensure that the movable disc seat 200 has elastic support capabilities during vibration, thereby reducing vibration interference.

[0046] 3. Universal drive assembly 300

[0047] The universal drive assembly 300 is used to generate vibration, and includes a mover disc 310 , a stator disc 320 and a plurality of permanent magnets 330 .

[0048] The mover disc 310 and stator disc 320 are arranged parallel to each other, with an air gap between them. This gap is larger than the amplitude of the mover disc 310's movement to ensure stability. A retaining plate 311 is provided on the top surface of the mover disc 310 to protect it.

[0049] A plurality of permanent magnets 330 are evenly distributed on the surface of the mover disc 310 . The permanent magnets 330 are evenly arranged in a circumferential direction to enhance the intensity of the magnetic field of the vibration.

[0050] The stator disc 320 includes several U-shaped yoke bodies 321, each of which has symmetrical coil windings 322 arranged on both sides. When an alternating current is passed through the coil windings 322, an alternating magnetic field is formed between the yoke bodies 321 and the permanent magnets 330, driving the mover disc 310 to vibrate.

[0051] 4. Control system

[0052] The control system is electrically connected to the coil winding 322 of the stator disk 320 and is used to adjust the current frequency, phase and amplitude to achieve vibration mode control of the mover disk 310 .

[0053] Axial high-frequency vibration: By passing an alternating current through the coil winding 322 , the axial magnetic field is used to drive the mover disc 310 to generate high-frequency reciprocating vibration.

[0054] Planar multi-directional vibration: By regulating the phase and frequency of the current in the coil winding 322, complex multi-directional vibration in the horizontal plane is generated to simulate various earthquake resistance scenarios.

[0055] The control system supports multiple vibration modes, including uniaxial vibration, compound vibration and random vibration, which can meet the detection needs under different earthquake conditions.

[0056] 5. Special design and optimization

[0057] Flexible support: The device adopts the design of airbag column head 220 and ball cover 230, so that the dynamic disc seat 200 has flexible support characteristics during the vibration process, effectively reducing vibration interference and improving detection accuracy.

[0058] Efficient Electromagnetic Drive: The radially distributed permanent magnets 330, combined with the U-shaped yoke 321 and symmetrical coil windings 322 of the stator disk 320, achieve efficient electromagnetic drive. Compared to traditional mechanical vibration methods, this delivers high vibration stability, lower energy consumption, and rapid and responsive vibration mode switching.

[0059] Adjustability: By dynamically adjusting the current parameters of the coil winding 322 through the control system, the intensity, frequency and direction of the vibration can be adjusted to meet the needs of different detection objects and working conditions.

[0060] Through the above structural design, the seismic detection device for raised floors of the present invention can effectively simulate earthquake conditions, is applicable to various seismic detection requirements, and improves detection efficiency and accuracy.

[0061] The working principle and use process of the present invention:

[0062] The seismic testing device for raised floors of the present invention realizes high-frequency axial vibration and planar multi-directional vibration of the movable disc seat 200 through electromagnetic drive, and transmits the vibration to the raised floor to be tested to simulate earthquake conditions for seismic performance testing.

[0063] Electromagnetic drive principle: When an alternating current is passed through the coil windings 322 in the stator disk 320, an alternating magnetic field is generated. The U-shaped magnetic yoke 321 concentrates this magnetic field, which acts on the permanent magnets 330 on the mover disk 310, thereby driving the mover disk 310 to vibrate. By adjusting the frequency and phase of the current, the mover disk 310 can achieve high-frequency axial reciprocating vibration and planar multi-directional vibration.

[0064] Vibration mode control: The control system can realize multiple modes such as uniaxial vibration, compound vibration and random vibration by adjusting the current parameter frequency, phase and amplitude of the coil winding 322, which is used to simulate different earthquake conditions.

[0065] The vibration transmission mechanism of the movable disc 200 is flexibly supported by the fixed disc 100 through the ball bearing cover 230 and the airbag column head 220. A fixture 210 atop the movable disc 200 secures the elevated floor to be tested. When the movable disc 200 vibrates, the vibration is transmitted to the elevated floor through the fixture 210, thereby testing the floor's seismic performance. The airbag column head 220 and ball bearing cover 230 provide elastic support during vibration, reducing interference and ensuring accurate vibration transmission.

[0066] The permanent magnets 330 on the surface of the mover disc 310 are evenly distributed along the circumference. This, combined with the U-shaped yoke 321 and symmetrical coil windings 322 of the stator disc 320, achieves uniform magnetic field distribution and efficient electromagnetic drive. The adjustable air gap between the mover disc 310 and the stator disc 320 ensures optimal magnetic field coupling and improves vibration efficiency.

[0067] Usage Process

[0068] 1. Installation and Initialization

[0069] Fix the fixed disc base 100 of the device on the base of the detection environment to ensure the stability of the entire device.

[0070] Check whether the airbag column head 220 and the ball bearing cover 230 are installed normally to ensure that the dynamic disc seat 200 has floating support capability.

[0071] Fix the elevated floor to be tested in the fixture 210 on top of the dynamic plate base 200, and adjust the fixture to ensure that the floor is firmly fixed.

[0072] 2. Parameter settings

[0073] Start the control system and select the appropriate vibration mode according to the detection requirements, including:

[0074] Uniaxial vibration: simulates the action of seismic waves in a single direction.

[0075] Composite vibration: Simulate composite seismic waves in multiple directions simultaneously.

[0076] Random vibration: simulate complex random earthquake conditions.

[0077] Parameters such as vibration frequency, amplitude and duration are set in the control system to meet the needs of different detection objects and working conditions.

[0078] 3. Enable vibration detection

[0079] The control system feeds an alternating current of set parameters into the coil winding 322 of the stator disk 320 , driving the mover disk 310 to generate vibrations of a set pattern.

[0080] The dynamic disc seat 200 realizes flexible support through the ball bearing cover 230 and the air bag column head 220, and applies vibration to the elevated floor.

[0081] 4. Data Collection and Analysis

[0082] During the vibration detection process, the mechanical response data of the raised floor under different vibration modes are collected, including parameters such as displacement, stress, and strain.

[0083] The data is recorded in real time by an external sensor system and transmitted to the analysis software for processing.

[0084] 5. Results Evaluation

[0085] Based on the collected test data, the seismic performance of the raised floor is evaluated, such as amplitude, durability, structural stability and other indicators.

[0086] Output test reports to analyze the performance of the floor under different earthquake conditions and determine whether it meets the design requirements.

[0087] 6. Shutdown and Maintenance

[0088] Stop vibration testing and remove the raised floor to be tested.

[0089] Check whether all parts of the device are operating normally, focusing on core parts such as the airbag column head 220, the ball cover 230, the mover plate 310 and the stator plate 320 to ensure that there is no abnormal wear or looseness.

[0090] If necessary, the air gap between the mover disc 310 and the stator disc 320 is adjusted to maintain the best driving effect.

[0091] Precautions for use

[0092] Ensure that the fixed plate base 100 is firmly installed to avoid displacement during vibration.

[0093] Before vibration testing, check that all electrical connections are normal to prevent short circuits or open circuits.

[0094] Be careful when adjusting the air gap to avoid it being too large or too small, which will affect the vibration performance and efficiency.

[0095] During the detection process, the operating status of the equipment is monitored in real time to prevent overload from damaging the coil winding 322 or other components.

[0096] Through the above working principle and usage process, this device can realize efficient and accurate seismic performance testing of raised floors and is suitable for structural safety assessment under various earthquake conditions.

[0097] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0098] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A seismic detection device for a raised floor, characterized in that: include: A fixed plate seat (100) is used to fix the overall structure of the raised floor anti-seismic detection device, and a plurality of positioning ears (110) are provided on the periphery thereof, and a supporting column (120) is provided on the top of the fixed plate seat (100); The movable disc seat (200) has an airbag column head (220) and a ball bearing cover (230) on its bottom surface, wherein the ball bearing cover (230) is connected to the surface of the support column (120) to realize floating support, and a fixture (210) is provided on the top for fixing the elevated floor to be tested; the airbag column head (220) is arranged between the fixed disc seat (100) and the movable disc seat (200) to provide floating support and vibration buffering; A universal drive assembly (300) is located between a fixed disc seat (100) and a movable disc seat (200), and comprises a movable disc (310), a stator disc (320), and a plurality of permanent magnets (330). A support disc (311) is fixedly mounted on the top surface of the movable disc (310). The movable disc (310) and the stator disc (320) are arranged in parallel with each other, with a gap provided therebetween. The stator disc (320) comprises a plurality of U-shaped magnetic yoke bodies (321). Symmetrical coil windings (322) are arranged on both sides of each magnetic yoke body (321) for generating an alternating magnetic field. A control system is electrically connected to the stator disk (320) and is used to control the mover disk (310) to generate axial high-frequency vibration and planar multi-directional vibration by adjusting current parameters of the coil winding (322) in the stator disk (320).

2. The seismic detection device for raised floors according to claim 1, characterized in that: A plurality of permanent magnets (330) are provided on the surface of the mover disc (310), and the permanent magnets (330) are evenly distributed in a circumferential direction and are used to enhance the intensity of the magnetic field of the vibration.

3. The seismic detection device for raised floors according to claim 1, characterized in that: The control system achieves high-frequency axial vibration and planar multi-directional vibration of the mover disc (310) by adjusting the current frequency and phase of the coil winding (322).

4. The raised floor seismic detection device according to claim 1, characterized in that: The bottom surface of the ball-bearing cover (230) is provided with a hemispherical groove adapted to the top of the support column (120), and a gap is provided between the bottom surface of the hemispherical groove and the surface of the support column (120). The bottom of the movable disc seat (200) contacts the support column (120) through the ball-bearing cover (230) to provide elastic support during vibration.

5. The raised floor seismic detection device according to claim 1, characterized in that: The fixture (210) is used to fix the elevated floor to be tested, and the vibration of the movable plate seat (200) causes simulated vibration to act on the elevated floor to be tested.

6. The seismic detection device for raised floors according to claim 1, characterized in that: The control system supports multiple vibration modes, including uniaxial vibration, compound vibration and random vibration, suitable for simulating different earthquake conditions; Axial high-frequency vibration is achieved by passing an alternating current through the coil winding (322), and utilizing the axial magnetic field to drive the mover disc (310) to generate high-frequency reciprocating vibration; The plane multi-directional vibration forms a complex multi-directional vibration in the horizontal plane by regulating the current phase and frequency in the coil winding (322) to simulate various earthquake resistance scenarios.

7. The raised floor anti-seismic detection device according to claim 1, characterized in that: The coil winding (322) is made of a conductor material resistant to high-frequency current. The size of the gap between the mover disc (310) and the stator disc (320) can be adjusted to achieve optimized magnetic field coupling. The gap is used for the vibration movement of the mover disc (310), and is larger than the movement amplitude of the mover disc (310).

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