Anti-seismic performance detection system and method for integrated electromechanical platform

Abstract

The invention discloses an anti-seismic performance detection system and method for a comprehensive electromechanical platform. The anti-seismic performance detection system comprises a bottom layer circular ring, a top layer circular ring, a pressure sensor and a sensing assembly. The top layer circular ring is connected with the bottom layer circular ring through the plurality of supporting leg assemblies, the pressure sensor is arranged on the top layer circular ring, and the sensing assembly comprises a plurality of displacement sensors and vibration sensors which are respectively arranged at key structure nodes of a to-be-tested electromechanical platform; the supporting leg assembly comprises a driving motor and a lead screw coaxially connected with an output shaft of the driving motor, the lead screw is in threaded connection with a first connecting block, a telescopic rod is arranged on the first connecting block, the motor is driven to operate, ordered vibration of the top-layer circular ring is achieved, multi-dimensional data acquisition of the electromechanical platform to be tested under the vibration condition is provided, and the reliability of the electromechanical platform to be tested is improved. The comprehensiveness and the accuracy of anti-seismic performance detection are ensured; the system is reasonable in structural design, has high adjustability and adaptability, and can flexibly adjust vibration parameters according to different test requirements.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a seismic performance detection system and method for an integrated electromechanical platform. Background Art

[0002] In the field of construction and electromechanical installation, with the complexity and height of modern buildings, electromechanical equipment plays an increasingly important role in buildings, including HVAC systems, electrical systems, and piping systems. These systems need to remain stable under normal use conditions, and in extreme environments such as earthquakes, the seismic performance of electromechanical equipment and its supporting structures is particularly critical. In order to ensure that electromechanical equipment remains functional in emergencies such as earthquakes, the industry has an increasing demand for the development of seismic detection and support systems for electromechanical equipment.

[0003] In the prior art, seismic detection systems mainly rely on static analysis or simplified dynamic simulations, usually by collecting local vibration data through a single sensor, and then combining limited vibration frequency and amplitude to infer the seismic performance of the equipment or platform. The limitations of these methods are: on the one hand, it is difficult for simplified vibration simulations to truly reproduce complex vibration environments, especially the multi-degree-of-freedom dynamic responses cannot be fully captured; on the other hand, the support components in existing systems usually do not have precise adjustment functions, resulting in the inability to achieve fine control and adjustment of vibration modes during testing. This defect is mainly reflected in the poor adaptability of the system, and it is difficult to flexibly set vibration excitations for different equipment types and working environments, and thus it is impossible to fully evaluate the stability and durability of the platform under test under real earthquake conditions.

[0004] Therefore, it is necessary to There is much room for improvement in the accuracy of vibration control and the comprehensiveness of data collection in the prior art, which is the core problem that the technical solution of the present invention can well solve. Summary of the invention

[0005] The purpose of the present invention is to provide a comprehensive electromechanical seismic detection support system and a seismic detection method to solve the above technical problems.

[0006] To achieve this object, the present invention adopts the following technical solutions: A seismic performance detection system for an integrated electromechanical platform, comprising: The bottom ring is used to provide support; A top circular ring is connected to the bottom circular ring through a plurality of support leg assemblies, wherein the upper end of the support leg assembly is rotatably connected to the bottom circular ring through a first rotating joint, and the lower end of the support leg assembly is rotatably connected to the top circular ring through a second rotating joint; A pressure sensor, arranged on the top ring, for detecting pressure change data when in contact with the electromechanical platform to be tested; A sensing component, including a plurality of displacement sensors and vibration sensors, which are respectively arranged at key structural nodes of the electromechanical platform to be tested; Among them, the support leg assembly includes a driving motor and a screw rod coaxially connected to the output shaft of the driving motor, a first connecting block is threadedly connected to the screw rod, and a telescopic rod is provided on the first connecting block. The driving motor drives the screw rod to rotate to adjust the length of the corresponding support leg assembly to achieve orderly vibration of the top ring.

[0007] Optionally, the number of the support leg assemblies is six groups, and a triangular structure is formed between any two adjacent groups of the support leg assemblies.

[0008] Optionally, a sliding rod is provided at one end face of the driving motor, the first connecting block is slidably connected to the sliding rod, a second connecting block is provided at one end of the sliding rod away from the driving motor, and one end of the telescopic rod passes through the second connecting block and is connected to the second rotating joint.

[0009] Optionally, the second rotating joint comprises a base body connected to the sliding rod, the base body is provided with a cone, one end surface of the cone is provided with a circular hole, and a connecting ball is welded at the circular hole; Among them, the connecting ball is a magnetic body, and a connecting hole is provided on the top ring at a position corresponding to the second rotating joint, and at least a part of the connecting ball is received in the connecting hole; and the connecting hole is provided with a magnetic component, and one end of the magnetic component is provided with an arc surface portion matching the connecting ball, and the magnetic component is magnetically connected to the connecting ball.

[0010] Optionally, the first rotating joint includes a support seat, a first rotating block is rotatably connected to the support seat, two side walls of the first rotating block are provided with a rotating shaft portion, the rotating shaft portion is rotatably connected to the support block, and one end of the support block is connected to the driving motor.

[0011] The present invention also provides a seismic performance detection method for an integrated electromechanical platform, which is applied to the seismic performance detection system for the integrated electromechanical platform as described above. The seismic performance detection method comprises: Step S1: installing multiple displacement sensors and vibration sensors at key structural nodes of the electromechanical platform to be tested; Step S2: applying a preset vibration excitation signal to the support leg assembly, and adjusting the length of each support leg assembly by the drive motor so that the top ring applies periodic excitation according to the set vibration mode; Step S3: starting the detection system to collect sensor response data of each sensor under vibration excitation; the sensor response data includes the speed and displacement response of the electromechanical platform to be tested in the horizontal, vertical and rotational directions, the platform amplitude response under the different vibration modes, and the transient pressure change of the connection part during the vibration process; Step S4: calculating a multi-degree-of-freedom vibration response index according to the collected sensor response data, wherein the multi-degree-of-freedom vibration response index includes the natural frequency, damping ratio and stiffness parameters of the electromechanical platform to be tested in each vibration direction; Step S5: Compare the obtained multi-degree-of-freedom vibration response index with the standard seismic performance index to evaluate the stability and durability of the platform under different vibration excitations.

[0012] Optionally, the step S2 specifically includes: Step S21: generating a preset vibration excitation signal, the parameters of which include frequency, amplitude and duration, and setting a specific vibration mode according to the working environment of the electromechanical platform to be tested; Step S22: inputting a corresponding vibration excitation signal to each driving motor of the support leg assembly, and adjusting the rotation speed of each driving motor in real time through the control module, so that the lead screw drives the length change of the corresponding support leg assembly; Step S23: Monitor the displacement status of each leg assembly in real time through a feedback control system.

[0013] Optionally, step S2 further includes: Step S24: obtaining response characteristics according to the change rate of the regulated vibration frequency and amplitude of the electromechanical platform to be tested, so as to dynamically adjust the vibration excitation signal nonlinearly; Step S25: After all the leg assemblies reach the set vibration excitation mode, the control system continuously monitors the periodic state of the vibration.

[0014] Optionally, the step S4 specifically includes: According to the processed displacement and velocity data, the natural frequencies of the electrical platform in the horizontal, vertical and rotational degrees of freedom are calculated by using time domain and frequency domain analysis methods. Step S43: on the basis of calculating the natural frequency, further using the vibration amplitude attenuation curve to calculate the damping ratio in the corresponding vibration direction; Step S44: combining the data of the natural frequency and the damping ratio and the pressure change data fed back by the pressure sensor, calculating the equivalent stiffness of the electromechanical platform to be tested in each vibration direction; Step S45: Calculate the multi-degree-of-freedom vibration response index by combining the obtained natural frequency, damping ratio and stiffness parameter.

[0015] Optionally, the step S5 specifically includes: Step S51: matching and comparing the calculated multi-degree-of-freedom vibration response index with various indicators in a preset standard seismic performance indicator library; Step S52: During the comparison process, the natural frequency and damping ratio in each direction are respectively subjected to difference analysis with the standard index, and the dynamic response performance of the platform to be tested under different vibration excitation conditions is determined by calculating the deviation rate between the actual value and the standard value; Step S53: Compare the stiffness parameters, and evaluate the structural stability of the platform under test by calculating the difference between the equivalent stiffness of the platform under test in different vibration modes and the standard seismic stiffness parameters; Step S54: Summarize the difference data between the multi-degree-of-freedom vibration response index and the standard seismic performance index, and calculate the overall stability index of the platform through a preset safety factor; Step S55: Perform further durability analysis based on the stability index result. If the stability index is lower than the predetermined threshold, enter the in-depth analysis phase to evaluate the fatigue characteristics and long-term durability of the platform under different vibration intensities through additional time domain analysis or frequency domain analysis.

[0016] Compared with the prior art, the present invention has the following beneficial effects: when the drive motor is running, it drives the screw to rotate, adjusts the position of the first connecting block, and then changes the length of the telescopic rod to adjust the length of the leg assembly. Through the coordinated change of the length of each leg assembly, the top ring can generate orderly vibration. The pressure sensor set on the top ring is used to detect the pressure change when it contacts the electromechanical platform to be tested; the displacement sensor and vibration sensor in the sensor assembly are installed on the key structural nodes of the electromechanical platform to be tested, and the response data of the platform during the vibration process is collected in real time; through the leg assembly with adjustable length, the top ring can be accurately and orderly vibrated according to the set vibration mode to simulate the real vibration environment; the coordinated work of the pressure sensor, displacement sensor and vibration sensor provides multi-dimensional data collection of the electromechanical platform to be tested under vibration conditions, ensuring the comprehensiveness and accuracy of seismic performance detection; the system structure is reasonably designed, with high adjustability and adaptability, and the vibration parameters can be flexibly adjusted according to different test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0019] Figure 1 Schematic diagram of the overall structure of the seismic performance detection system of the first embodiment; Figure 2 It is a structural schematic diagram of the support leg assembly of the seismic performance detection system of the first embodiment of the present invention; Figure 3 is a schematic structural diagram of the first rotating joint of the seismic performance detection system of the first embodiment; Figure 4 Schematic diagram of the structure of the second rotating joint of the anti-seismic performance detection system of the first embodiment.

[0020] Figure numbers: bottom ring 10, top ring 20, pressure sensor 30, support leg assembly 40, first rotating joint 50, second rotating joint 60, drive motor 41, screw rod 42, first connecting block 43, telescopic rod 44, sliding rod 45, second connecting block 46, base body 61, cone body 62, connecting ball 63, connecting hole 21, support seat 51, first rotating block 52, shaft portion 53, support block 54. DETAILED DESCRIPTION

[0021] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] Embodiment 1: Combination Figures 1 to 4 As shown, an embodiment of the present invention provides a seismic performance detection system for an integrated electromechanical platform, including: a bottom ring 10, a top ring 20, a pressure sensor 30 and a sensing component, wherein the bottom ring 10 is used to provide support.

[0025] The top ring 20 is connected to the bottom ring 10 through a plurality of leg assemblies 40 . The upper end of the leg assembly 40 is rotatably connected to the bottom ring 10 through a first rotating joint 50 , and the lower end of the leg assembly 40 is rotatably connected to the top ring 20 through a second rotating joint 60 .

[0026] The pressure sensor 30 is disposed on the top ring 20 and is used to detect pressure change data when in contact with the electromechanical platform to be tested.

[0027] The sensing component includes a plurality of displacement sensors and vibration sensors, which are respectively arranged at key structural nodes of the electromechanical platform to be tested.

[0028] Among them, the support leg assembly 40 includes a driving motor 41, and a screw rod 42 coaxially connected to the output shaft of the driving motor 41, a first connecting block 43 is threadedly connected to the screw rod 42, and a telescopic rod 44 is arranged on the first connecting block 43. The driving motor 41 drives the screw rod 42 to rotate to adjust the length of the corresponding support leg assembly 40 and realize the orderly vibration of the top ring 20.

[0029] The working principle of the present invention is as follows: when the driving motor 41 is running, the screw rod 42 is driven to rotate, the position of the first connecting block 43 is adjusted, and then the length of the telescopic rod 44 is changed to adjust the length of the support leg assembly 40. Through the coordinated change of the length of each support leg assembly 40, the top ring 20 can generate orderly vibration. The pressure sensor 30 arranged on the top ring 20 is used to detect the pressure change when it contacts the electromechanical platform to be tested; the displacement sensor and the vibration sensor in the sensing assembly are installed on the key structural nodes of the electromechanical platform to be tested, and the response data of the platform during the vibration process is collected in real time; through the adjustable length support leg assembly 40, the top ring 20 can be accurately and orderly vibrated according to the set vibration mode to simulate the real vibration environment; the coordinated work of the pressure sensor 30, the displacement sensor and the vibration sensor provides multi-dimensional data collection of the electromechanical platform to be tested under vibration conditions, ensuring the comprehensiveness and accuracy of the seismic performance detection; the system structure is reasonably designed, with high adjustability and adaptability, and the vibration parameters can be flexibly adjusted according to different test requirements.

[0030] As a preferred solution of this embodiment, the number of the leg assemblies 40 is six, and a triangular structure is formed between any two adjacent sets of leg assemblies 40. Such a design enables the support system to have higher stability and rigidity. By forming a triangular frame between adjacent leg assemblies 40, vibrations and external forces from different directions can be effectively dispersed and withstood, preventing structural deformation or imbalance.

[0031] In this embodiment, it is further explained that a sliding rod 45 is provided on one end face of the driving motor 41, a first connecting block 43 is slidably connected to the sliding rod 45, a second connecting block 46 is provided on one end of the sliding rod 45 away from the driving motor 41, and one end of the telescopic rod 44 passes through the second connecting block 46 and is connected to the second rotating joint 60. The first connecting block 43 can slide freely on the sliding rod 45, and cooperate with the rotational movement of the driving motor 41 to achieve precise adjustment of the length of the support leg assembly 40. The telescopic rod 44 is connected to the second rotating joint 60 through the second connecting block 46, which ensures that the support leg assembly 40 maintains good flexibility and stability during the length change process.

[0032] In this embodiment, it is specifically described that the second rotating joint 60 includes a base body 61 connected to the sliding rod 45, the base body 61 is provided with a cone 62, one end surface of the cone 62 is provided with a circular hole, and a connecting ball 63 is welded at the circular hole.

[0033] Among them, the connecting ball 63 is a magnetic body, and a connecting hole 21 is provided on the top ring 20 at a position corresponding to the second rotating joint 60, and at least a part of the connecting ball 63 is received in the connecting hole 21; and a magnetic component is provided in the connecting hole 21, and an arc surface portion matching the connecting ball 63 is provided at one end of the magnetic component, and the magnetic component is magnetically connected to the connecting ball 63.

[0034] It should be noted that, in order to ensure that the top ring 20 does not fall off during vibration, the connection ball 63 uses a strong magnet, and the connection balls 63 in multiple directions jointly provide connection stability, so that the top ring 20 can provide flexible vibration while not falling off. At least part of the connection ball 63 is received in the connection hole 21, and the arc surface further increases the force on the connection ball 63, while allowing the connection ball 63 to rotate relative to each other.

[0035] In this embodiment, combined with Figure 4 As shown, specifically, the first rotating joint 50 includes a support base 51, a first rotating block 52 is rotatably connected to the support base 51, a rotating shaft 53 is provided on both side walls of the first rotating block 52, a supporting block 54 is rotatably connected to the rotating shaft 53, and one end of the supporting block 54 is connected to the driving motor 41. Thus, the first rotating joint 50 can provide rotational freedom in two directions, thereby improving flexibility and stability during the rotation process.

[0036] Embodiment 2: The present invention also provides a seismic performance detection method for an integrated electromechanical platform, which is applied to the seismic performance detection system for an integrated electromechanical platform as in the first embodiment. The seismic performance detection method includes: Step S1: Install multiple displacement sensors and vibration sensors at key structural nodes of the electromechanical platform to be tested; the displacement sensors are used to monitor the horizontal and vertical displacements of the platform in a vibration environment in real time, the vibration sensors are used to collect the amplitude responses of the platform under different vibration modes, and the dynamic pressure sensor 30 is used to monitor the transient pressure changes of the connection parts during the vibration process.

[0037] Step S2: Apply a preset vibration excitation signal to the support leg assembly 40, and drive the motor 41 to adjust the length of each support leg assembly 40 so that the top ring 20 applies periodic excitation according to the set vibration mode; the amplitude, frequency and duration of the excitation signal are set according to the actual use environment of the platform to be tested.

[0038] Step S3: Start the detection system and collect sensor response data of each sensor under vibration excitation; the sensor response data include the speed and displacement response of the electromechanical platform to be tested in the horizontal, vertical and rotational directions, the platform amplitude response under different vibration modes, and the transient pressure change of the connection part during the vibration process; measure the platform to be tested separately and record the real-time data of the dynamic pressure sensor 30 at the same time to obtain the multi-degree-of-freedom dynamic response characteristics of the platform to be tested in a complex vibration environment.

[0039] Step S4: Calculate the multi-degree-of-freedom vibration response index based on the collected sensor response data, where the multi-degree-of-freedom vibration response index includes the natural frequency, damping ratio and stiffness parameters of the electromechanical platform to be tested in each vibration direction; determine the mechanical properties and stress distribution of the platform to be tested in different vibration modes through comprehensive analysis of the vibration response data and pressure data.

[0040] Step S5: Compare the obtained multi-degree-of-freedom vibration response index with the standard seismic performance index to evaluate the stability and durability of the platform under different vibration excitations.

[0041] If all parameters meet the predetermined requirements, the seismic performance of the electromechanical installation platform is judged to be qualified; if any parameters do not meet the standards, the frequency domain analysis or time domain analysis method is further used to conduct a detailed evaluation of the vibration characteristics of the platform to be tested, determine its specific weak links and put forward improvement suggestions.

[0042] In this embodiment, it is specifically described that step S2 specifically includes: Step S21: Generate a preset vibration excitation signal, the parameters of the vibration excitation signal include frequency, amplitude and duration, and set a specific vibration mode according to the working environment of the electromechanical platform to be tested; the vibration mode may include a sine wave, a square wave or a random signal, and digital signal generation and regulation are performed through a control module.

[0043] Step S22: Input a corresponding vibration excitation signal to each drive motor 41 of the support leg assembly 40, and adjust the rotation speed of each drive motor 41 in real time through the control module, so that the screw rod 42 drives the length change of the corresponding support leg assembly 40; the length adjustment is carried out synchronously to ensure that the top ring 20 applies uniform and orderly periodic excitation at different support points according to the predetermined vibration mode.

[0044] Step S23: Monitor the displacement state of each leg assembly 40 in real time through a feedback control system. The feedback system collects real-time position information through the displacement sensor on each leg assembly 40 and feeds it back to the control module to ensure that the leg length is adjusted accurately and the rhythm and frequency of the vibration excitation meet the preset signal.

[0045] Step S24: According to the change rate of the vibration frequency and amplitude of the electromechanical platform to be tested, the response characteristics are obtained to adjust the vibration excitation signal nonlinearly and dynamically; by adjusting the change rate of the vibration frequency and amplitude, the nonlinear regulation function is added to simulate a more complex vibration environment. The nonlinear regulation function is implemented through the calculation logic of the control module, which can generate combined excitations of different amplitudes and frequencies, thereby more realistically simulating complex external vibration conditions.

[0046] Step S25: After all the leg assemblies 40 reach the set vibration excitation mode, the control system continuously monitors the periodic state of the vibration. Ensure that the length adjustment of each leg assembly 40 strictly matches the set vibration frequency and mode. If a length adjustment deviation of the leg assembly 40 is detected during the vibration process, the control module automatically sends a correction signal to readjust the parameters of the drive motor 41 of the corresponding leg assembly 40 to maintain the consistency and stability of the vibration.

[0047] In this embodiment, it is specifically described that step S4 specifically includes: According to the processed displacement and velocity data, the time domain and frequency domain analysis methods are used to calculate the natural frequencies of the electrical platform in the horizontal, vertical and rotational degrees of freedom respectively; the calculation of the natural frequency can be done by extracting the main frequency of each vibration direction from the spectrum through methods such as Fourier transform or autocorrelation function.

[0048] Step S43: On the basis of calculating the natural frequency, further using the vibration amplitude attenuation curve, calculate the damping ratio in the corresponding vibration direction; the damping ratio can be calculated by using the logarithmic reduction method, and the damping ratio parameters can be obtained according to the decreasing law of the response amplitude in multiple vibration cycles.

[0049] Step S44: Combine the data of natural frequency and damping ratio, and calculate the equivalent stiffness of the electromechanical platform to be tested in each vibration direction through the pressure change data fed back by the pressure sensor 30; the stiffness calculation can be solved by dynamic load and corresponding displacement response to ensure that the stiffness characteristics of the platform can be accurately quantified under different vibration modes.

[0050] Step S45: The obtained natural frequency, damping ratio and stiffness parameters are combined to calculate the multi-degree-of-freedom vibration response index. As a comprehensive evaluation index, the vibration response index can fully reflect the dynamic response characteristics of the electromechanical platform under test in different vibration directions and vibration modes, and can be further used to compare with the standard seismic performance index to evaluate the seismic performance of the platform.

[0051] In this embodiment, it is specifically described that step S5 specifically includes: Step S51: Match and compare the calculated multi-degree-of-freedom vibration response index with various indicators in a preset standard seismic performance index library; the standard seismic performance index is set according to the type of electromechanical platform to be tested, the use environment and relevant industry standards, covering multiple parameters such as natural frequency, damping ratio, stiffness and dynamic response amplitude.

[0052] Step S52: During the comparison process, the natural frequency and damping ratio in each direction are subjected to difference analysis with the standard indexes. By calculating the deviation rate between the actual value and the standard value, the dynamic response performance of the platform under different vibration excitation conditions is determined. Special attention is paid to whether there is significant frequency drift or damping ratio abnormality.

[0053] Step S53: Compare the stiffness parameters and evaluate the structural stability of the platform under test by calculating the difference between the equivalent stiffness of the platform under test in different vibration modes and the standard seismic stiffness parameters; the comparison can be quantified by calculating the deviation of the equivalent stiffness coefficient to determine the load-bearing capacity and anti-deformation capacity of the platform under test in a vibration environment.

[0054] Step S54: Summarize the difference data between the multi-degree-of-freedom vibration response index and the standard seismic performance index, and calculate the overall stability index of the platform through a preset safety factor; the stability index reflects the durability and reliability of the platform under complex vibration conditions. The closer the value is to 1, the higher the stability is and the more it meets the standard requirements.

[0055] Step S55: Further durability analysis is performed based on the stability index result. If the stability index is lower than the predetermined threshold, the in-depth analysis phase is entered to evaluate the fatigue characteristics and long-term durability of the platform under different vibration intensities through additional time domain analysis or frequency domain analysis. Potential weak links are identified and suggestions for structural improvement are put forward.

[0056] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A seismic performance detection system for an integrated electromechanical platform, characterized in that: include: The bottom ring is used to provide support; A top circular ring is connected to the bottom circular ring through a plurality of support leg assemblies, wherein the upper end of the support leg assembly is rotatably connected to the bottom circular ring through a first rotating joint, and the lower end of the support leg assembly is rotatably connected to the top circular ring through a second rotating joint; A pressure sensor, arranged on the top ring, for detecting pressure change data when in contact with the electromechanical platform to be tested; A sensing component, including a plurality of displacement sensors and vibration sensors, which are respectively arranged at key structural nodes of the electromechanical platform to be tested; Among them, the support leg assembly includes a driving motor and a screw rod coaxially connected to the output shaft of the driving motor, a first connecting block is threadedly connected to the screw rod, and a telescopic rod is provided on the first connecting block. The driving motor drives the screw rod to rotate to adjust the length of the corresponding support leg assembly to achieve orderly vibration of the top ring.

2. The seismic performance detection system for the integrated electromechanical platform according to claim 1 is characterized in that: The number of the support leg assemblies is six, and a triangular structure is formed between any two adjacent groups of the support leg assemblies.

3. The seismic performance detection system for the integrated electromechanical platform according to claim 1 is characterized in that: A sliding rod is provided at one end surface of the driving motor, the first connecting block is slidably connected to the sliding rod, a second connecting block is provided at one end of the sliding rod away from the driving motor, and one end of the telescopic rod passes through the second connecting block and is connected to the second rotating joint.

4. The seismic performance detection system for an integrated electromechanical platform according to claim 1, characterized in that: The second rotating joint comprises a base body connected to the sliding rod, the base body is provided with a cone, one end surface of the cone is provided with a circular hole, and a connecting ball is welded at the circular hole; Among them, the connecting ball is a magnetic body, and a connecting hole is provided on the top ring at a position corresponding to the second rotating joint, and at least a part of the connecting ball is received in the connecting hole; and the connecting hole is provided with a magnetic component, and one end of the magnetic component is provided with an arc surface portion matching the connecting ball, and the magnetic component is magnetically connected to the connecting ball.

5. The seismic performance detection system for the integrated electromechanical platform according to claim 1 is characterized in that: The first rotating joint comprises a supporting seat, a first rotating block is rotatably connected to the supporting seat, two side walls of the first rotating block are provided with rotating shafts, the rotating shafts are rotatably connected to the supporting block, and one end of the supporting block is connected to the driving motor.

6. A method for detecting the seismic performance of an integrated electromechanical platform, characterized in that: Applied to the seismic performance detection system for the integrated electromechanical platform as claimed in any one of claims 1 to 4, the seismic performance detection method comprises: Step S1: installing multiple displacement sensors and vibration sensors at key structural nodes of the electromechanical platform to be tested; Step S2: applying a preset vibration excitation signal to the support leg assembly, and adjusting the length of each support leg assembly by the drive motor so that the top ring applies periodic excitation according to the set vibration mode; Step S3: starting the detection system to collect sensor response data of each sensor under vibration excitation; the sensor response data includes the speed and displacement response of the electromechanical platform to be tested in the horizontal, vertical and rotational directions, the platform amplitude response under the different vibration modes, and the transient pressure change of the connection part during the vibration process; Step S4: calculating a multi-degree-of-freedom vibration response index according to the collected sensor response data, wherein the multi-degree-of-freedom vibration response index includes the natural frequency, damping ratio and stiffness parameters of the electromechanical platform to be tested in each vibration direction; Step S5: Compare the obtained multi-degree-of-freedom vibration response index with the standard seismic performance index to evaluate the stability and durability of the platform under different vibration excitations.

7. The seismic performance detection method for an integrated electromechanical platform according to claim 6, characterized in that: The step S2 specifically includes: Step S21: generating a preset vibration excitation signal, the parameters of which include frequency, amplitude and duration, and setting a specific vibration mode according to the working environment of the electromechanical platform to be tested; Step S22: inputting a corresponding vibration excitation signal to each driving motor of the support leg assembly, and adjusting the rotation speed of each driving motor in real time through the control module, so that the lead screw drives the length change of the corresponding support leg assembly; Step S23: Monitor the displacement status of each leg assembly in real time through a feedback control system.

8. The seismic performance detection method for an integrated electromechanical platform according to claim 7, characterized in that: The step S2 further comprises: Step S24: obtaining response characteristics according to the change rate of the regulated vibration frequency and amplitude of the electromechanical platform to be tested, so as to dynamically adjust the vibration excitation signal nonlinearly; Step S25: After all the leg assemblies reach the set vibration excitation mode, the control system continuously monitors the periodic state of the vibration.

9. The seismic performance detection method for an integrated electromechanical platform according to claim 6, characterized in that: The step S4 specifically includes: According to the processed displacement and velocity data, the natural frequencies of the electrical platform in the horizontal, vertical and rotational degrees of freedom are calculated by using time domain and frequency domain analysis methods. Step S43: on the basis of calculating the natural frequency, further using the vibration amplitude attenuation curve to calculate the damping ratio in the corresponding vibration direction; Step S44: combining the data of the natural frequency and the damping ratio and the pressure change data fed back by the pressure sensor, calculating the equivalent stiffness of the electromechanical platform to be tested in each vibration direction; Step S45: Calculate the multi-degree-of-freedom vibration response index by combining the obtained natural frequency, damping ratio and stiffness parameter.

10. The seismic performance detection method for an integrated electromechanical platform according to claim 6, characterized in that: The step S5 specifically includes: Step S51: matching and comparing the calculated multi-degree-of-freedom vibration response index with various indicators in a preset standard seismic performance indicator library; Step S52: During the comparison process, the natural frequency and damping ratio in each direction are respectively subjected to difference analysis with the standard index, and the dynamic response performance of the platform to be tested under different vibration excitation conditions is determined by calculating the deviation rate between the actual value and the standard value; Step S53: Compare the stiffness parameters, and evaluate the structural stability of the platform under test by calculating the difference between the equivalent stiffness of the platform under test in different vibration modes and the standard seismic stiffness parameters; Step S54: Summarize the difference data between the multi-degree-of-freedom vibration response index and the standard seismic performance index, and calculate the overall stability index of the platform through a preset safety factor; Step S55: Perform further durability analysis based on the stability index result. If the stability index is lower than the predetermined threshold, enter the in-depth analysis phase to evaluate the fatigue characteristics and long-term durability of the platform under different vibration intensities through additional time domain analysis or frequency domain analysis.

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