Urban safety condition display method and device based on big data

Abstract

The invention relates to the technical field of digital twinning, and provides a city safety condition display method and device based on big data. The method comprises the following steps: acquiring a building provided with a building shock insulation support, determining the position of the building as an acquisition point, and constructing a digital twinborn model according to the positions of all the acquisition points in a city and a map of the city; when an earthquake occurs, determining intensity data of each acquisition point so as to determine an earthquake center corresponding to a first presentation object of the digital twin model; generating a first display instruction of the earthquake by using the intensity data, the theoretical magnitude and the earthquake center of each first presentation object; and executing the first display instruction to display the city safety condition of the earthquake, thereby solving the problems that monitoring and reporting of the city safety condition are not timely, and safety condition data are not transparent.

Description

Technical Field

[0001] The present invention relates to the technical field of digital twins, and particularly to a method and device for displaying urban safety conditions based on big data. Background Art

[0002] Currently, when conducting urban safety planning and management, a large amount of manual work is still relied on, and there are even cases of repeated operations between online and offline work. Especially when highly destructive safety events such as earthquakes occur, there are often situations where the monitoring and reporting of urban safety conditions are not timely among different cities and between cities, and the safety condition data is not transparent.

[0003] For the earthquake scenario, the urban safety conditions in each region of each city and between a city and its adjacent cities are strongly correlated. However, the existing technologies have not been able to break through the data barriers, resulting in a relatively low intelligence level of the entire urban safety planning system.

[0004] In view of this, overcoming the defects of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method and device for displaying urban safety conditions based on big data. The purpose is to collect the intensity data of each building affected by the earthquake using the building isolation bearings in the city during an earthquake; through the digital twin model, abstract the collection points where building isolation bearings are installed in the city into the presentation objects of urban safety conditions. By abstracting the collection points, the data barriers between different regions of the city and between a city and its adjacent cities are broken, and the problems of untimely monitoring and reporting of urban safety conditions and non-transparent safety condition data are solved.

[0006] The present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a method for displaying urban safety conditions based on big data, which acquires buildings installed with building isolation bearings, determines the locations of the acquired buildings as collection points, and constructs a digital twin model according to the locations of all collection points in the city and the map of the city;

[0008] The method includes:

[0009] During an earthquake, determine the intensity data of each collection point in the digital twin model;

[0010] According to the acquired intensity data, determine the first presentation object of the digital twin model;

[0011] Simulate the process of the vibration attenuation of each first presentation object with distance to generate the vibration distance model of this earthquake; according to the vibration distance model, determine the earthquake center corresponding to each first presentation object;

[0012] Use the intensity data, theoretical magnitude and earthquake center of each first presentation object to generate the first display instruction for this earthquake; execute the first display instruction to display the urban safety situation of this earthquake in the city.

[0013] Further, when the earthquake occurs, determining the intensity data of each acquisition point in the digital twin model includes:

[0014] During the acquisition time, obtain the induced current corresponding to each electromagnet from the sensors in the building isolation bearings of the acquisition point;

[0015] According to the electromagnets with changed induced current, determine the relative position change between the upper bearing plate and the lower bearing plate corresponding to the acquisition point;

[0016] Determine the relative movement speed of the acquisition point during this earthquake by taking the ratio of the relative position change to the acquisition time;

[0017] Calculate the intensity data of the acquisition point using the relative movement speed.

[0018] Further, the determining the relative position change between the upper bearing plate and the lower bearing plate corresponding to the acquisition point according to the electromagnets with changed induced current includes:

[0019] Obtain the upper electromagnet with a first preset change in the induced current, and determine the first relative movement direction and the first relative displacement amount of the upper bearing plate according to the position of the obtained upper electromagnet;

[0020] Obtain the lower electromagnet with a second preset change in the induced current, and determine the second relative movement direction and the second relative displacement amount of the lower bearing plate according to the position of the obtained lower electromagnet;

[0021] Obtain the relative position change between the upper bearing plate and the lower bearing plate according to the first relative movement direction and the first relative displacement amount, and the second relative movement direction and the second relative displacement amount.

[0022] Further, a steel plate is provided in the slider of the building isolation bearing, and the steel plate cuts the magnetic induction lines between the upper electromagnet and the lower electromagnet as a conductor to generate damping, so that the movement speed of the slider is slowed down to reduce the movement of the upper bearing plate relative to the lower bearing plate;

[0023] The method for displaying urban safety situation based on big data further includes:

[0024] When an earthquake occurs, obtain the damping value generated by the steel plate as a conductor cutting the magnetic induction line;

[0025] Use the damping value to calculate the theoretical shaking amplitude of the building corresponding to the acquisition point;

[0026] In the digital twin model, determine the acquisition point as the second rendering object;

[0027] Use the theoretical shaking amplitude corresponding to each second rendering object to generate a second display instruction for this earthquake;

[0028] Execute the second display instruction to display the theoretical shaking amplitude of the building during this earthquake.

[0029] Furthermore, the method for displaying the urban safety situation based on big data further includes:

[0030] Determine the areas in the city where building seismic isolation bearings are not installed and the areas where the installation density of building seismic isolation bearings is lower than the threshold as uncovered areas;

[0031] Select installable points in the uncovered areas;

[0032] After installing building seismic isolation bearings at the installable points, determine the positions where the installable points are located as new acquisition points in the digital twin model;

[0033] When an earthquake occurs, determine the intensity data of the new acquisition points; determine the third rendering object of the digital twin model according to the obtained intensity data;

[0034] Use the theoretical magnitude and earthquake center corresponding to each third rendering object to generate a third display instruction for this earthquake; execute the third display instruction to update the urban safety situation of the city during this earthquake.

[0035] Furthermore, the selecting installable points in the uncovered areas includes:

[0036] Determine the scenic buildings in the uncovered areas; among them, the construction volume of installing building seismic isolation bearings in the scenic buildings is less than a preset value;

[0037] Conduct a layout of building seismic isolation bearing installation for the scenic buildings to obtain the installation quantity of the building seismic isolation bearings required for the scenic buildings;

[0038] When the installation quantity is greater than or equal to three, the scenic buildings pass the acquisition effectiveness detection;

[0039] When the scenic area building passes the acquisition validity test, determine the location where the scenic area building is located as an installable point.

[0040] Further, use the intensity data when an earthquake occurred in the city historically to construct an earthquake wave propagation model of the city;

[0041] The determining the first presentation object of the digital twin model according to the obtained intensity data includes:

[0042] Use the obtained intensity data to construct an intensity distribution map;

[0043] Input the obtained intensity data into the earthquake wave propagation model; the earthquake wave propagation model predicts the theoretical distribution map at different magnitudes;

[0044] For each collection point, compare the predicted intensity data in the theoretical distribution map with the actually collected intensity data in the intensity distribution map; determine the hit collection points where the difference between the predicted intensity data and the actually collected intensity data in the theoretical distribution map is less than a preset error; when the number of hit collection points is greater than the hit threshold, obtain the theoretical magnitude of each collection point predicted by the theoretical distribution map;

[0045] Determine the collection points with the obtained theoretical magnitude as the first presentation object.

[0046] Further, the building isolation bearing includes an upper fixing plate, an upper bearing plate, a lower fixing plate and a lower bearing plate;

[0047] Wherein, the upper fixing plate is fixed on the upper bearing plate, the upper fixing plate bears the building structure, the lower fixing plate is arranged on the foundation, and the lower bearing plate is fixed on the lower fixing plate; the slider is slidably arranged between the upper bearing plate and the lower bearing plate;

[0048] A plurality of upper electromagnets distributed in an array are arranged in the upper fixing plate, a plurality of lower electromagnets distributed in an array are arranged in the lower fixing plate, and sensors are arranged on the power supply lines of each upper electromagnet and lower electromagnet, and the sensors are used to collect the voltage change conditions on the power supply lines of the corresponding electromagnets to determine the induced current corresponding to the power supply lines of each electromagnet.

[0049] In a second aspect, the present invention also provides a device for displaying the urban safety situation based on big data, including:

[0050] At least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the processor for executing the method for displaying the urban safety situation based on big data described in the first aspect.

[0051] In a third aspect, the present invention further provides a non-volatile computer storage medium storing computer-executable instructions, which are executed by one or more processors to complete the method for displaying urban security conditions based on big data described in the first aspect.

[0052] In a fourth aspect, there is provided a computer program product containing instructions, which, when running on a computer or a processor, cause the computer or the processor to execute the method for displaying urban security conditions based on big data as described in the first aspect.

[0053] In a fifth aspect, the present invention further provides a system for displaying urban security conditions based on big data, including the device for displaying urban security conditions based on big data as described in the second aspect, and using the method for displaying urban security conditions based on big data as described in the first aspect to complete the interaction of the device for displaying urban security conditions based on big data described in the second aspect.

[0054] Differing from the prior art, the present invention has at least the following beneficial effects:

[0055] During an earthquake, the present invention utilizes the seismic isolation bearings in the city to collect the intensity data of each building affected by the earthquake, realizing the automatic monitoring and collection of urban security conditions and avoiding repeated operations online and offline; through the digital twin model, the collection points of each building installed with seismic isolation bearings in the city are abstracted into the presentation objects of urban security conditions, and based on the actually collected intensity data, the theoretical magnitude of each first presentation object and the earthquake center of all first presentation objects are predicted, and the intensity data, theoretical magnitude of each first presentation object, the earthquake center of all first presentation objects and the current time information are displayed, making the security condition data transparent among different regions of each city and between a city and its adjacent cities, breaking the barriers between urban security condition data, and greatly improving the quality and efficiency of urban security planning and management during highly destructive security events such as earthquakes. Description of the Drawings

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0057] Figure 1 It is a schematic diagram of a digital twin system provided by an embodiment of the present invention;

[0058] Figure 2It is a schematic diagram of a urban safety planning visualization platform provided by an embodiment of the present invention;

[0059] Figure 3 It is a schematic diagram of the corresponding relationship of a digital twin model provided by an embodiment of the present invention;

[0060] Figure 4 It is a schematic flowchart of a method for displaying urban safety conditions based on big data provided by an embodiment of the present invention;

[0061] Figure 5 It is a partial schematic diagram of a building isolation bearing in a static state provided by an embodiment of the present invention;

[0062] Figure 6 It is a schematic diagram of a building isolation bearing in a moving state provided by an embodiment of the present invention;

[0063] Figure 7 It is a schematic diagram of a specific example of the positional relationship between an electromagnet and a steel plate during non-earthquake provided by an embodiment of the present invention;

[0064] Figure 8 It is a schematic diagram of a specific example of an electromagnet affected by an electromagnetic field during an earthquake provided by an embodiment of the present invention;

[0065] Figure 9 It is a schematic flowchart of step 10 provided by an embodiment of the present invention;

[0066] Figure 10 It is a schematic flowchart of step 102 provided by an embodiment of the present invention;

[0067] Figure 11 It is a schematic flowchart of a second method for displaying urban safety conditions based on big data provided by an embodiment of the present invention;

[0068] Figure 12 It is a schematic diagram of the movement direction of a slider during an earthquake provided by an embodiment of the present invention;

[0069] Figure 13 It is a schematic flowchart of a third method for displaying urban safety conditions based on big data provided by an embodiment of the present invention;

[0070] Figure 14 It is a schematic flowchart of a fourth method for displaying urban safety conditions based on big data provided by an embodiment of the present invention;

[0071] Figure 15 It is a schematic diagram of a second urban safety planning visualization platform provided by an embodiment of the present invention;

[0072] Figure 16It is a schematic diagram of the third urban safety planning visualization platform provided by the embodiments of the present invention;

[0073] Figure 17 It is a schematic flowchart of step 602 provided by the embodiments of the present invention;

[0074] Figure 18 It is a schematic architecture diagram of a device for displaying urban safety conditions based on big data provided by the embodiments of the present invention.

[0075] Among them, the reference numerals are:

[0076] Upper fixing plate 1; upper electromagnet 11; upper support plate 2; upper spherical slideway 21; lower fixing plate 3; lower electromagnet 31; lower support plate 4; lower spherical slideway 41; slider 5; steel plate 51; upper sliding panel 52; lower sliding panel 53. Detailed implementation manners

[0077] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0078] Unless otherwise required by the context, throughout the specification and claims, the term "comprising" is interpreted in an open inclusive sense, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" etc. are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner, that is, although they may be carried in the above-mentioned embodiments or examples due to reasons such as the order and position of appearance, but it does not limit that they can be carried by one embodiment or example in a combined manner.

[0079] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure 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 should not be construed as a limitation to the present disclosure.

[0080] In the description of the present invention, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, for example, in the description, for the same type of nouns, the method of adding "A" and "B" at the end is used to describe them as two independent individuals. In this case, the features defined with "A" and "B" are only used for the purpose of distinguishing similar individuals and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0081] When describing some embodiments, the expressions "coupled", "coupled to" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components have direct physical contact or electrical contact with each other. Another example is that when describing some embodiments, the term "coupled to" may be used to indicate that two or more components have direct physical contact or electrical contact. However, the term "connected" or "coupled" may also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other, such as "optical path coupling", "wireless connection", etc. The embodiments disclosed herein are not necessarily limited to the content of the present invention.

[0082] In the description of the present invention, the expression "A and / or B" (where A and B are used to formally represent specific feature contents) is involved, and the corresponding expression includes the following three combinations: only A, only B, and the combination of A and B.

[0083] As used in the present invention, "about", "substantially" or "approximately" includes the stated value and the average value within an acceptable deviation range of the specific value, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurement being discussed and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system).

[0084] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0085] Embodiment 1:

[0086] To solve the above problems, an embodiment of the present invention provides a method for displaying the urban safety situation based on big data. Buildings equipped with building isolation bearings are acquired, the positions of the acquired buildings are determined as collection points, and a digital twin model is constructed according to the positions of all collection points in the city and the map of the city.

[0087] Among them, the embodiments of the present invention provide an urban safety planning system based on a digital twin model. The digital twin model is a model established in the digital world that is completely consistent with the performance of a physical entity and can perform real-time simulation on it. The digital twin model refers to digitally copying the physical objects of buildings in a city, simulating the behavior of buildings in the real environment, and virtually simulating the safety conditions of buildings, so as to improve the monitoring and reporting efficiency of urban safety conditions, timely collect intensity data during earthquakes, and real-time predict earthquake magnitudes and earthquake centers, etc. On this basis, it is also possible to predict subsequent safety conditions to break down the barriers between data with strong correlations in each region of each city and between a city and its adjacent cities.

[0088] In the embodiments of the present invention, when modeling the urban safety situation and constructing a digital twin system, the data synchronization of each collection point must be carried out first. That is, based on the actual location of real buildings, a set of virtual collection points are built to simulate the actual city; as Figure 1 shown, through the front-end collection of intensity data of real collection points, with the help of external resources, 3D modeling is carried out on each building (i.e., physical entity) in the city equipped with building isolation bearings. In the back-end, the model data of the virtual entity is obtained based on the intensity data during real earthquakes, and the location of the building and the 3D model are set into the digital twin scene at the front-end, realizing a one-to-one correspondence between the buildings in the actual city and the abstracted virtual collection points. When performing data synchronization, the display of real collection point data is driven by the instructions of a Programmable Logic Controller (PLC for short). The PLC enables the device to perform the specified established actions; the data collected from the PLC is used to drive the corresponding models in the virtual environment to perform the same established actions, realizing the real-time linkage of the real buildings and the presented objects of the virtual collection points, and further realizing the real-time monitoring of the urban safety situation; the monitoring personnel only need to be in the control room and monitor the virtual collection points to understand the safety status in the real city and between cities in real time, without waiting for on-site manual investigation or collecting precise earthquake magnitude data through professional institutions. Instead, through the 3D visualization effect of the virtual collection points, they can more clearly understand the actual safety conditions of each building in the city, such as the degree of earthquake impact, etc. And based on the actual safety situation, predictions are made on subsequent safety conditions, that is, the actual control of the physical entity by the digital twin is realized.

[0089] As Figure 2 shown, when using the digital twin system for safety situation visualization, through the urban safety planning system, the safety status of regions, streets, etc. within multiple cities can be presented.

[0090] Among them, the digital twin model uses the sensor data installed on the real building isolation bearings as the boundary conditions of the simulation model to realize the synchronization of the digital twin and the physical entity. By perceiving the status and environment of the physical entity in real time, the digital twin evolves with the physical entity and maintains a high degree of fidelity. At the same time, through simulation, deduction and predictive analysis on the digital twin, it acts on the physical entity in turn.

[0091] As Figure 2 and Figure 3 shown, using the presented objects demonstrated by the digital twin model, the collection point conditions of adjacent cities can be shown; further, each region can be divided according to the earthquake situation, for example, dangerous regions, medium and low risk regions, and regions predicted to possibly turn into dangerous regions, etc. In the urban safety planning system, each city, as a physical entity, can be abstracted into a corresponding digital entity.

[0092] Based on the above digital twin model, as Figure 4 shown, the method for displaying the urban safety situation based on big data includes:

[0093] Step 10: When an earthquake occurs, determine the intensity data of each collection point in the digital twin model.

[0094] Among them, the intensity data refers to the degree of influence of the building at the location of the collection point on the building during an earthquake. The process of determining the intensity data based on the data detected by the building isolation bearing will be described below.

[0095] Step 20: According to the obtained intensity data, determine the first presented object of the digital twin model.

[0096] Since there are multiple collection points in the digital twin model, the collection points that can obtain intensity data are used as the first presented objects to facilitate the subsequent display of the relevant safety situations of the first presented objects.

[0097] Step 30: Simulate the process of the vibration attenuation of each first presented object with distance to generate a vibration distance model for this earthquake; according to the vibration distance model, determine the earthquake center corresponding to each first presented object.

[0098] Among them, the earthquake theory model can be used to simulate the process of vibration attenuation with distance according to the intensity distribution map. The earthquake theory model can be selected by those skilled in the art according to the specific usage scenario and will not be limited here.

[0099] In the first moment when an earthquake occurs, the embodiment of the present invention can generate the distribution of intensity data, that is, obtain an intensity distribution map, according to the intensity data and the map of the corresponding city, etc.; and then, according to the intensity distribution map, simulate the influence of the buildings at each collection point in the city during this earthquake, and predict the theoretical earthquake center of all collection points in the city during this earthquake.

[0100] Step 40: Generate a first display instruction for this earthquake by using the intensity data, theoretical magnitude, and earthquake center of each of the first presentation objects; execute the first display instruction to display the urban safety situation of this earthquake in the city.

[0101] Among them, each first presentation object has corresponding intensity data and theoretical magnitude, and there is a theoretical earthquake center corresponding to all the first presentation objects of this earthquake. The embodiment of the present invention displays these data through the first display instruction.

[0102] As Figure 2 shown is a specific example of the urban safety planning visualization platform after executing the first display instruction provided by the embodiment of the present invention; Figure 2 in it, on each area and street of the city map, the theoretical magnitude and current time information of each collection point in the dangerous area that is greatly affected by this earthquake are displayed.

[0103] When an earthquake occurs, the present invention uses the seismic isolation bearings in the buildings in the city to collect the intensity data of each building affected by the earthquake, realizes the automatic monitoring and collection of the urban safety situation, and avoids repeated online and offline operations; through the digital twin model, abstracts each collection point installed with seismic isolation bearings in the city into a presentation object of the urban safety situation, predicts the theoretical magnitude of each first presentation object and the earthquake center of all first presentation objects based on the actually collected intensity data, and displays the intensity data and theoretical magnitude of each first presentation object, the earthquake center of all first presentation objects, and the current time information, making the safety situation data transparent in each region of each city and between a city and its adjacent cities, breaking the barrier between urban safety situation data, and being able to greatly improve the quality and efficiency of urban safety planning management when high-destructive safety events such as earthquakes occur.

[0104] In order to further illustrate the method for displaying the urban safety situation based on big data, the seismic isolation bearings of the embodiment of the present invention will be introduced first below:

[0105] As Figure 5As shown in the figure, the building isolation bearing includes an upper fixing plate 1, an upper bearing plate 2, a lower fixing plate 3 and a lower bearing plate 4. Among them, the upper fixing plate 1 is fixed on the upper bearing plate 2, the upper fixing plate 1 bears the building structure, the lower fixing plate 3 is arranged on the foundation, and the lower bearing plate is fixed on the lower fixing plate 3. The slider 5 is slidably arranged between the upper bearing plate 2 and the lower bearing plate. The slider 5 is slidably arranged between the upper bearing plate 2 and the lower bearing plate 4. The shape of the upper surface of the slider 5 matches the inner shape of the upper bearing plate 2, and the shape of the lower surface of the slider 5 matches the inner shape of the lower bearing plate 4. Moreover, the inner side of the upper bearing plate 2 abuts against the upper surface of the slider 5, and the inner side of the lower bearing plate 4 abuts against the lower surface of the slider 5. A sliding space is formed between the upper bearing plate 2 and the lower bearing plate 4. As Figure 7 shown, each upper electromagnet 11 and each lower electromagnet 31 are powered on by corresponding power supply lines. A plurality of upper electromagnets 11 distributed in an array are arranged in the upper fixing plate 1, and a plurality of lower electromagnets 31 distributed in an array are arranged in the lower fixing plate 3. Sensors ( Figures 5 - 8 not shown in the figure) are arranged on the power supply lines of each upper electromagnet 11 and each lower electromagnet 31. The sensors are used to collect the voltage change conditions on the power supply lines of the corresponding electromagnets to determine the induced current corresponding to the power supply line of each electromagnet. Among them, the sensors report the collected voltage change conditions and the labels of the corresponding electromagnets to the processor ( Figures 5 - 8 not shown in the figure) of the embodiment of the present invention, and the processor determines the induced current corresponding to the electromagnet according to the received voltage change conditions and labels.

[0106] As Figure 6 shown, during an earthquake, the slider 5 slides in the sliding space to displace the upper bearing plate 2 and the lower bearing plate 4. A steel plate 51 is arranged in the slider 5. Wires led out from the upper fixing plate 1 are used to supply power to the plurality of upper electromagnets 11. Wires led out from the lower fixing plate 3 are used to supply power to the plurality of lower electromagnets 31 to apply voltage to each upper electromagnet 11 and each lower electromagnet 31, so that magnetic induction lines are generated between the upper electromagnet 11 and the corresponding lower electromagnet 31 during an earthquake. As Figure 8 shown, after the upper electromagnet 11 and the lower electromagnet 31 are powered on, magnetic induction lines are generated. The steel plate 51 cuts the magnetic induction lines as a conductor to generate damping, so that the movement speed of the slider 5 is slowed down to reduce the movement of the upper bearing plate 2 relative to the lower bearing plate 4.

[0107] The seismic isolation bearing of the embodiment of the present invention is installed on the foundation, and the buildings are all built on the seismic isolation bearing; when an earthquake occurs, under the action of the seismic force, the foundation will be affected by the seismic shock wave in the horizontal direction, and the corresponding horizontal impact force will cause the slider to slide within the sliding space, that is, the slider will have a relative position change with the foundation and the lower support plate, so that the lower support plate and the upper support plate are relatively displaced; among them, the upper support plate basically does not move with the movement of the foundation, so as to reduce the impact of the earthquake on the building. Due to the existence of the slider and the sliding space, the seismic wave impact force transmitted from the seismic isolation bearing of the embodiment of the present invention to the upper building structure is weakened, so the building structure can be protected when an earthquake occurs.

[0108] The embodiment of the present invention determines the intensity data based on the data detected by the seismic isolation bearing of the building, such as Figure 9 shown, the step 10 includes:

[0109] Step 101: During the acquisition time, obtain the induced current corresponding to each electromagnet from the sensors in the seismic isolation bearing of the building at the acquisition point.

[0110] Among them, the induced current corresponding to the electromagnet refers to the induced current collected by the sensor arranged on the power supply line of an upper electromagnet or a lower electromagnet.

[0111] Since sensors are arranged on the power supply lines of the upper electromagnets and the lower electromagnets of each seismic isolation bearing of the building, the relative position change between the upper support plate and the lower support plate corresponding to the acquisition point can be judged directly through the induced current collected by the corresponding sensors.

[0112] Step 102: Determine the relative position change between the upper support plate and the lower support plate corresponding to the acquisition point according to the electromagnet with the changed induced current.

[0113] When an earthquake occurs, power is supplied to multiple electromagnets in the seismic isolation bearing of the building to apply voltage to each upper electromagnet and lower electromagnet, so that each upper electromagnet and the corresponding lower electromagnet generate magnetic induction lines; the data detected by the sensor is obtained in real time to determine the change of the induced current of each electromagnet, and the reference position of the steel plate is determined according to the change of the induced current when an earthquake occurs; during the earthquake, continue to obtain the change of the induced current of each electromagnet in real time to determine the real-time position of the steel plate, and then determine the relative position change between the upper support plate and the lower support plate according to the real-time position and the reference position, that is, the relative position change between the building and the foundation.

[0114] For example, as Figure 7 shown by the dotted line box, the reference position of the steel plate can be calibrated by the positions of the following electromagnets: the 4th, 5th, and 6th upper electromagnets from left to right in the upper fixing plate, and the 4th, 5th, and 6th lower electromagnets from left to right in the lower fixing plate.Figure 8 This is a schematic diagram of a specific example of an electromagnet affected by an electromagnetic field during an earthquake provided by an embodiment of the present invention. During an earthquake, the slider is affected by the earthquake shock wave and will slide in the sliding space. At this time, the position of the electromagnet below the position where the steel plate is located after sliding is calibrated as follows: As Figure 8 shown by the dashed box in the figure, the 3rd, 4th, and 5th upper electromagnets from left to right in the upper fixing plate, and the 6th, 7th, and 8th lower electromagnets from left to right in the lower fixing plate. In the upper fixing plate and the lower fixing plate, respectively, according to the corresponding reference positions, taking a single electromagnet as a unit, calculate the relative position change that occurs between the upper fixing plate and the lower fixing plate; since the affected upper electromagnet in the upper fixing plate moves 1 unit to the left and the affected lower electromagnet in the lower fixing plate moves 2 units to the right, the relative position change between the upper support plate and the lower support plate is 3 units. By obtaining the distance between the units where the corresponding electromagnets are set in the upper fixing plate and the lower fixing plate, the specific value of the relative position change can be obtained.

[0115] Step 103: Determine the relative movement speed of the acquisition point during this earthquake by taking the ratio of the relative position change to the acquisition time.

[0116] Step 104: Calculate the intensity data of the acquisition point using the relative movement speed.

[0117] In one embodiment, a statistical relationship between earthquake intensity and earthquake motion parameters (for example, relative movement speed) can be established through an intensity scale. For example, intensity VI (severe damage) corresponds to a peak ground acceleration (Peak Ground Acceleration, abbreviated as PGA) of approximately 0.21g - 0.5g and a peak ground velocity (Peak Ground Velocity, abbreviated as PGV) of approximately 20 - 50 cm / s; intensity VII (severe damage) corresponds to a peak ground acceleration of approximately 0.5g - 1.0g and a peak ground velocity of approximately 50 - 100 cm / s; where g represents the acceleration due to gravity, and the peak ground acceleration is expressed as a multiple of the acceleration due to gravity. The peak ground velocity is extracted from the processed velocity time history curve as the core parameter for intensity assessment. The peak ground velocity is compared with the regional intensity scale (for example, the China Earthquake Intensity Scale) to determine the intensity data.

[0118] Combined with the building isolation bearing of the embodiment of the present invention, the process of determining the relative position change is specifically as Figure 10 shown, and step 102 includes:

[0119] Step 1021: Obtain the upper electromagnet whose induced current undergoes a first preset change, and determine the first relative movement direction and the first relative displacement amount of the upper support plate according to the position of the obtained upper electromagnet.

[0120] Among them, the first preset change is selected by those skilled in the art according to the specific usage scenario. In one embodiment, the first preset change may be that the magnitude of the induced current changes from being lower than the first lower limit value to being higher than the first current value. Here, the first lower limit value and the first current value are selected by those skilled in the art according to the specific usage scenario. When the magnitude of the induced current is lower than the first lower limit value, it indicates that there is almost no induced current on the power supply line. When the magnitude of the induced current is higher than the first current value, it indicates that there is a stable induced current on the power supply line.

[0121] For example, as Figure 7 and Figure 8 shown, there are 9 upper electromagnets arranged in the upper fixing plate. These 9 upper electromagnets are all the upper electromagnets on one side of the upper support plate of the building isolation bearing. The electromagnets within the dashed box are the upper and lower electromagnets that generate the magnetic induction lines cut by the steel plate.

[0122] For example, the position of the upper electromagnet where the first preset change of the induced current occurs is the 3rd upper electromagnet from left to right. Since when there is no earthquake, the positions of the upper and lower electromagnets in the building isolation bearing correspond one by one. For the upper support plate and the lower support plate, the electromagnets that generate the magnetic induction lines cut by the steel plate are the 4th, 5th, and 6th electromagnets from left to right. And the first preset change of the induced current occurs in the 3rd upper electromagnet from left to right, indicating that the first relative movement direction of the upper support plate is to the left. Taking the position width occupied by each electromagnet in the corresponding fixing plate as one unit, at this time, the first relative displacement amount is one unit.

[0123] Step 1022: Obtain the lower electromagnet where the second preset change of the induced current occurs, and determine the second relative movement direction and the second relative displacement amount of the lower support plate according to the position of the obtained lower electromagnet.

[0124] Similarly, the second preset change is selected by those skilled in the art according to the specific usage scenario. In one embodiment, the second preset change may be that the magnitude of the induced current changes from being lower than the second lower limit value to being higher than the second current value. Here, the second lower limit value and the second current value are selected by those skilled in the art according to the specific usage scenario. When the magnitude of the induced current is lower than the second lower limit value, it indicates that there is almost no induced current on the power supply line. When the magnitude of the induced current is higher than the second current value, it indicates that there is a stable induced current on the power supply line.

[0125] For example, as Figure 7 and Figure 8 shown, there are 9 lower electromagnets arranged in the lower fixing plate. These 9 lower electromagnets are all the lower electromagnets on one side of the lower support plate of the building isolation bearing.

[0126] For example, the positions of the lower electromagnets where the induced current undergoes a second preset change are the 7th and 8th lower electromagnets from left to right. Since when there is no earthquake, the magnetic induction lines cut by the steel plate are generated by the 4th, 5th, and 6th lower electromagnets from left to right in the lower support plate; and the induced current undergoes a second preset change in the 7th and 8th lower electromagnets from left to right, indicating that the second relative movement direction of the lower support plate is towards the right. At this time, the second relative displacement is two units.

[0127] Step 1023: Obtain the relative position change between the upper support plate and the lower support plate according to the first relative movement direction and the first relative displacement, as well as the second relative movement direction and the second relative displacement.

[0128] Since the upper support plate moves by the first relative displacement in the first relative movement direction, the position change deviation of the upper support plate can be expressed as -1; the lower support plate moves by the second relative displacement in the second relative movement direction, and the position change deviation of the lower support plate can be expressed as 2. Subtract the position change deviations of the two and take the absolute value to obtain that the relative position change between the upper support plate and the lower support plate is 3, that is, three units.

[0129] To illustrate the process of determining the first presentation object, as Figure 11 shown, the step 20 includes:

[0130] Step 201: Use the obtained intensity data to construct an intensity distribution map.

[0131] Step 202: Input the obtained intensity data into the seismic wave propagation model; the seismic wave propagation model predicts the theoretical distribution maps at different magnitudes.

[0132] Among them, use the intensity data of the city during historical earthquakes to construct the seismic wave propagation model of the city; the seismic wave propagation model is selected by those skilled in the art according to the specific usage scenario and is not limited here. The map used for the theoretical distribution map is the same as the map used for constructing the digital twin model, and the theoretical distribution map contains the predicted intensity data of each collection point involved in the map.

[0133] Input the intensity data of each collection point actually collected during the earthquake into the seismic wave propagation model; the seismic wave propagation model outputs at least one predicted theoretical distribution map.

[0134] Step 203: For each acquisition point, compare the predicted intensity data in the theoretical distribution map with the actually acquired intensity data in the intensity distribution map; determine the hit acquisition points where the difference between the predicted intensity data and the actually acquired intensity data in the theoretical distribution map is less than a preset error; when the number of hit acquisition points is greater than the hit threshold, obtain the theoretical magnitudes of each acquisition point predicted by the theoretical distribution map.

[0135] Among them, the preset error and the hit threshold are selected by those skilled in the art according to the specific usage scenario; in one embodiment, the preset error can be 0.05g; the hit threshold can be 90% of the total amount of the actually acquired intensity data in the intensity distribution map.

[0136] Since the positions and quantities of the acquisition points in the theoretical distribution map and the intensity distribution map are the same, compare the intensity data of the acquisition points at the same position in the theoretical distribution map and the intensity distribution map. When the difference between the predicted intensity data and the actually acquired intensity data is less than the preset error, it indicates that the prediction of the theoretical distribution map for this acquisition point is relatively accurate; when the number of hit acquisition points in a theoretical distribution map is greater than the hit threshold, it indicates that the prediction of this theoretical distribution map based on the intensity data for the current earthquake situation is relatively close to the actual situation. At this time, the theoretical magnitudes of each acquisition point predicted by this theoretical distribution map are also relatively close to the actual situation; obtain the corresponding theoretical magnitudes for subsequent presentation as the urban safety situation.

[0137] Step 204: Determine the acquisition points with the obtained theoretical magnitudes as the first presentation object.

[0138] Since there may be acquisition points that cannot be predicted or have large prediction errors, the acquisition points for which the theoretical magnitudes can be determined are determined as the first presentation object and displayed on the urban safety planning visualization platform.

[0139] In order to further display the urban safety situation on the urban safety planning visualization platform and enable the impacts on buildings in various regions of the city during an earthquake to be intuitively presented, an embodiment of the present invention also provides a method for predicting and displaying the theoretical sway amplitude based on building isolation bearings. The embodiment of the present invention utilizes the characteristics of building isolation bearings to achieve the prediction of the theoretical sway amplitude. In order to illustrate the method for predicting and displaying the theoretical sway amplitude, the building isolation bearings of the embodiment of the present invention will be further described below:

[0140] During an earthquake, the embodiment of the present invention makes the sway amplitudes of the building structure during the earthquake as consistent as possible to further reduce the impacts on the building structure.

[0141] In one embodiment, a voltage is applied to each upper electromagnet and lower electromagnet. After the upper and lower electromagnets are powered on, magnetic induction lines are generated; the steel plate, as a conductor, cuts the magnetic induction lines to generate damping, which slows down the movement speed of the slider to reduce the relative movement of the upper support plate relative to the lower support plate. Among them, different voltages are applied according to the aging degree of different building isolation bearings, so that the relative position change between the upper fixing plate and the lower fixing plate in each building isolation bearing is basically the same, and thus the building basically remains stationary or the swing amplitude is as consistent as possible. Among them, the voltage range of the voltage applied for different aging degrees is: 60 volts to 290 volts, and the specific voltage value of this voltage is determined by those skilled in the art according to the specific usage scenario and experience.

[0142] In one embodiment, assume that there is a building isolation bearing with a relatively large relative displacement. During an earthquake, an electromagnetic field is formed between the upper electromagnet and the corresponding lower electromagnet in the vertical direction to generate corresponding magnetic induction lines. Affected by the earthquake wave and friction, the slider slides within the sliding space; the steel plate in the slider, as a conductor, cuts the magnetic induction lines to generate damping, which slows down the movement speed of the slider, and further reduces the relative displacement, making the swing amplitudes of all building isolation bearings as consistent as possible.

[0143] It should be noted here that after applying voltage to the electromagnet, the shock absorption effect of each building isolation bearing may become slightly worse, but it can ensure that the swing amplitudes of all building isolation bearings are as consistent as possible to avoid the building from cracking.

[0144] In one embodiment, for the same earthquake, when the ratio of the number of building isolation bearings with a large difference in shock absorption effect to the total number of all building isolation bearings under the building structure does not exceed the second proportional threshold, directly replace the building isolation bearings with a large difference in shock absorption effect; among them, the second proportional threshold is determined by those skilled in the art according to the specific usage scenario, and the second proportional threshold can be 1 / 8.

[0145] In one embodiment, based on the difference in shock absorption effect (i.e., the difference in relative movement change), the aging degree of each building isolation bearing is marked, and the mapping relationship between the aging degree and the voltage magnitude is established, so as to apply differential pressure to the building isolation bearings with different aging degrees according to the mapping relationship, making the magnetic field intensity generated by the electromagnets in all the building isolation bearings under the building structure different. In the building isolation bearings with a lower aging degree, by applying a voltage with a relatively large voltage value (for example, 220 volts), a relatively large electromagnetic damping is generated when the steel plate cuts the magnetic induction lines of the corresponding electromagnetic field; for the building isolation bearings with a higher aging degree, by applying a voltage with a relatively small voltage value, a relatively small electromagnetic damping is generated when the steel plate cuts the magnetic induction lines of the corresponding electromagnetic field, or the influence of the electromagnetic damping generated by the steel plate cutting the magnetic induction lines on the position of the steel plate in the sliding space can be ignored. By applying corresponding voltages of appropriate magnitudes according to different aging degrees, the movement speed of the steel plate in the building isolation bearings with a lower aging degree is slowed down, and the relative movement displacement of the building isolation bearings with a lower aging degree is reduced. By generating electromagnetic damping in the building isolation bearings with a lower aging degree, the electromagnetic damping is used to balance the friction force when the slider slides in the building isolation bearings with a higher aging degree, so that the resistance received by the sliders in the building isolation bearings under the building structure is as consistent as possible, thereby ensuring that the swing amplitude of the building structure during an earthquake is as consistent as possible, so as to reduce the damage to the building structure caused by the earthquake.

[0146] On this basis, in an optional embodiment, for a specified relative position change (e.g., 3 units), the number of seismic isolation bearings of the building with the same relative position change as the specified relative position change is determined as the first number; the first ratio of the first number to the total number of all seismic isolation bearings under the building structure is determined. When the first ratio exceeds the first ratio threshold, for the seismic isolation bearings with a relative position change (e.g., 1 unit) less than the specified relative position change, or for the seismic isolation bearings with a relative position change less than a certain change range (e.g., 2 units to 3 units), compared with the voltage applied to the seismic isolation bearings corresponding to the specified relative position change, a larger voltage can be applied to the seismic isolation bearings with a relative position change less than the specified relative position change or the current magnitude can be increased to increase the electromagnetic damping generated by the seismic isolation bearings with a relative position change less than the specified relative position change during an earthquake, so that the swing amplitudes are as consistent as possible; wherein, the first ratio threshold is determined by those skilled in the art according to the specific usage scenario. When the first ratio exceeds the first ratio threshold, for the seismic isolation bearings with a relative position change (e.g., 4 units) greater than the specified relative position change, or for the seismic isolation bearings with a relative position change greater than a certain change range (e.g., 2 units to 3 units), compared with the voltage applied to the seismic isolation bearings corresponding to the specified relative position change, a smaller voltage can be applied to the seismic isolation bearings with a relative position change greater than the specified relative position change or the current magnitude can be decreased to reduce the electromagnetic damping generated by the seismic isolation bearings with a relative position change greater than the specified relative position change during an earthquake, thereby making the swing amplitudes of the seismic isolation bearings under the building structure as consistent as possible.

[0147] In the case of a large earthquake magnitude, the foundation may also be greatly affected by the earthquake shock wave, and the following situation may occur:

[0148] Such as Figure 12 shown, the horizontal impact force generated by the huge earthquake shock wave causes the slider 5 to slide within the sliding space, and the slider 5 has a large relative position change relative to the lower support plate 4 and the upper support plate 2. At this time, due to the large horizontal impact force, the slider 5 moves upward along the direction indicated by the thick arrow in Figure 12 with a large acceleration towards the edges of the upper spherical slideway 21 of the upper support plate 2 and the lower spherical slideway 41 of the lower support plate 4 (as shown by the dashed box in Figure 12 ). Since the acceleration (and / or, moving speed) of the slider 5 is large, and the space at the edges of the upper spherical slideway 21 and the lower spherical slideway 41 (i.e., the narrow part at the edge of the sliding space) is difficult to accommodate the slider 5, so the slider 5 moves to as shown in Figure 12When in the position of the dashed-line frame, a collision will occur. The corresponding collision will damage the building isolation bearing. In particular, the materials of the upper spherical slideway 21, the lower spherical slideway 41, the upper sliding panel 52, and the lower sliding panel 53 will be severely worn or even cracked, and the damage of the building isolation bearing seriously endangers the safety of the upper building structure.

[0149] To avoid damaging the building isolation bearing, in this embodiment, a voltage is applied to each of the upper electromagnet 11 and the lower electromagnet 31. After the upper electromagnet 11 and the lower electromagnet 31 are powered on, magnetic induction lines are generated; the steel plate 51, as a conductor, cuts the magnetic induction lines to generate damping, so that the moving speed (and / or, acceleration) of the slider 5 is slowed down, or the slider 5 moves in the opposite direction to prevent the slider 5 from violently colliding as Figure 12 in the position of the dashed-line frame in, and reduce the movement of the upper bearing plate 2 relative to the lower bearing plate 4, protect the building isolation bearing, and enable it to maintain a normal working state to reduce the damage of seismic shock waves to the building structure. The voltage range of the voltage applied to each of the upper electromagnet 11 and the lower electromagnet 31 here is 110 volts to 380 volts, and the specific voltage value of the voltage is determined by those skilled in the art according to the specific usage scenario and experience.

[0150] In one embodiment, the generated damping causes the slider 5 to move in the opposite direction, as Figure 12 shown by the thin-line arrow in, and the damping in the corresponding direction reduces the acceleration (and / or, moving speed) of the slider 5 moving towards the position of the dashed-line frame in. Since the applied voltage is large enough, the corresponding upper electromagnet 11 and lower electromagnet 31 generate a strong electromagnetic field, so the damping generated after the steel plate 51 in the slider 5 cuts the magnetic induction lines can prevent the slider 5 from sliding and colliding with the seismic shock wave, making the slider 5 move in the direction of the thin-line arrow in Figure 12 towards the central position of the sliding space to avoid colliding with the narrow edge of the sliding space. Figure 12

[0151] Since a steel plate is provided in the slider of the building isolation bearing, when an earthquake occurs and the slider is sliding, the steel plate, as a conductor, cuts the magnetic induction lines between the upper electromagnet and the lower electromagnet to generate damping, so that the moving speed of the slider is slowed down to reduce the movement of the upper bearing plate relative to the lower bearing plate; therefore, the embodiment of the present invention uses the generated damping to predict the theoretical sway amplitude of the building above the building isolation bearing, as Figure 13 shown, the method for displaying the urban safety situation based on big data further includes:

[0152] Step 501: When an earthquake occurs, obtain the damping value generated by the steel plate cutting the magnetic induction lines as a conductor.

[0153] Step 502: Calculate the theoretical sway amplitude of the building corresponding to the acquisition point using the damping value.

[0154] Since the building isolation bearing of the embodiment of the present invention can weaken the actual sway amplitude of the building above the building isolation bearing through the damping force, the building will sway without generating damping through the building isolation bearing. And the theoretically sway amplitude at this time is: the sway amplitude that the same magnitude of seismic shock wave corresponding to the damping force generated by the building isolation bearing can make the building sway.

[0155] Step 503: In the digital twin model, determine the acquisition point as the second presentation object.

[0156] Step 504: Generate a second display instruction for this earthquake using the theoretical sway amplitudes corresponding to the respective second presentation objects.

[0157] Step 505: Execute the second display instruction to display the theoretical sway amplitude of the building during this earthquake.

[0158] Similarly, the embodiment of the present invention takes the acquisition points that can predict the theoretical sway amplitude as the second presentation objects and displays them on the urban safety planning visualization platform.

[0159] Since the embodiment of the present invention constructs the safety status of each region and city through the data of multiple acquisition points, it is necessary to make the coverage of the acquisition points as wide as possible and ensure the density of data distribution monitoring. However, in the actual scenario, there may very likely be many buildings without building isolation bearings installed. For the omitted areas in this city where there are no building isolation bearings installed, as Figure 14 shown, the method for displaying the urban safety situation based on big data further includes:

[0160] Step 601: Determine the areas in the city where there are no building isolation bearings installed and the areas where the installation density of the building isolation bearings is lower than the threshold as the uncovered areas.

[0161] Among them, the threshold is selected by those skilled in the art according to the specific usage scenario and is not limited herein. For example, in the dotted box area shown in the lower left corner of the city map in Figure 15 , the density of the acquisition points is lower than the threshold, that is, the installation density of the building isolation bearings is lower than the threshold, so this area is an uncovered area.

[0162] Step 602: Select installable points in the uncovered areas.

[0163] Step 603: After installing a building isolation bearing at the installable point, determine the position where the installable point is located as the newly added acquisition point in the digital twin model.

[0164] As Figure 16 shown, after installing the building isolation bearing, the installation location is taken as a newly added acquisition point and incorporated into the digital twin model to increase the coverage of the acquisition points and the density of data distribution monitoring.

[0165] Step 604: When an earthquake occurs, determine the intensity data of the newly added acquisition point; determine the third presentation object of the digital twin model according to the acquired intensity data.

[0166] Step 605: Generate a third display instruction for this earthquake using the theoretical magnitude and earthquake center corresponding to each of the third presentation objects; execute the third display instruction to update the urban safety situation of this earthquake in the city.

[0167] Similarly, as Figure 16 shown, the embodiment of the present invention takes the newly added acquisition point that can determine the intensity data as the third presentation object and displays it on the urban safety planning visualization platform.

[0168] To illustrate the process of selecting the installable points, as Figure 17 shown, the step 602 includes:

[0169] Step 6021: Determine the scenic buildings in the uncovered area; wherein, the construction volume of installing the building isolation bearing in the scenic buildings is less than a preset value.

[0170] Among them, the preset value is selected by those skilled in the art according to the specific usage scenario and is not limited herein.

[0171] The embodiment of the present invention selects installable points from the scenic buildings in the city to reduce the construction volume; in an optional embodiment, the scenic buildings can be landmark buildings, for example, statues, squares, parks, and rockeries.

[0172] For the determined scenic buildings, it is also necessary to perform acquisition effectiveness detection.

[0173] Step 6022: Layout the installation of the building isolation bearing for the scenic buildings to obtain the installation quantity of the building isolation bearing required for the scenic buildings.

[0174] Step 6023: When the installation quantity is greater than or equal to three, the scenic buildings pass the acquisition effectiveness detection.

[0175] Step 6024: When the scenic buildings pass the acquisition effectiveness detection, determine the location where the scenic buildings are located as the installable points.

[0176] Among them, for the newly added acquisition points, when an earthquake occurs, the foundation under the scenic area building is a plane. Only when this plane is supported solely by building isolation bearings can the impact of seismic waves on the scenic area building be accurately detected by the building isolation bearings, and only then is the scenic area building suitable to be abstracted as an effective acquisition point. Suppose this plane is not only supported by building isolation bearings. When installing the building isolation bearings, in order to ensure the stability of the upper scenic area building during an earthquake, this plane can only be supported by building isolation bearings and fixed supports (for example, supported by two building isolation bearings and one fixed support). Then, during an earthquake, the fixed support will offset a part of the seismic shock wave, causing the building isolation bearings to be affected by the fixed support, and the intensity data detected cannot fully represent the impact on the scenic area building. Therefore, the size of the selected scenic area building must be such that at least three building isolation bearings can be used as supports.

[0177] Embodiment 2:

[0178] As Figure 18 shown, it is a schematic architecture diagram of a device for displaying urban safety conditions based on big data according to an embodiment of the present invention. The device for displaying urban safety conditions based on big data in this embodiment includes one or more processors 21 and a memory 22. Among them, Figure 18 One processor 21 is taken as an example herein.

[0179] The processor 21 and the memory 22 can be connected through a bus or other means, Figure 18 Taking connection through a bus as an example herein.

[0180] The memory 22, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs and non-volatile computer-executable programs, such as the method for displaying urban safety conditions based on big data in this embodiment. The processor 21 executes the method for displaying urban safety conditions based on big data by running the non-volatile software programs and instructions stored in the memory 22.

[0181] The memory 22 may include a high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 22 may optionally include a memory remotely set relative to the processor 21, and these remote memories can be connected to the processor 21 through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0182] The program instructions / modules are stored in the memory 22 and, when executed by the one or more processors 21, perform the method for displaying the urban security situation based on big data in the above embodiments. For example, the steps of the method for displaying the urban security situation based on big data in the embodiments of the present invention described above are executed.

[0183] An embodiment of the present invention further provides a non-volatile computer storage medium storing computer-executable instructions that, when executed by one or more processors, such as Figure 18 a processor 21, enable the one or more processors to execute the method for displaying the urban security situation based on big data in the specific embodiments of the present invention. For example, the steps of the method for displaying the urban security situation based on big data in the embodiments of the present invention described above are executed; it can also implement Figure 18 the various modules and units described above; or execute the method for displaying the urban security situation based on big data in the specific embodiments of the present invention. For example, the steps of the method for displaying the urban security situation based on big data in the embodiments of the present invention described above are executed; it can also implement Figure 18 the various modules and units described above.

[0184] It should be noted that, regarding the information interaction, execution process, etc. between the modules and units in the above device and system, since they are based on the same concept as the method embodiments of the present invention, the specific content can be referred to the description in the method embodiments of the present invention and will not be elaborated here.

[0185] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium, which can include: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc.

[0186] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for displaying urban security situations based on big data, characterized in that, Obtain the building installed with building isolation bearings, determine the location where the obtained building is located as the collection point, and construct a digital twin model according to the locations of all collection points in the city and the map of the city; The method includes: When an earthquake occurs, determine the intensity data of each collection point in the digital twin model; According to the obtained intensity data, determine the first presentation object of the digital twin model; Simulate the process of the vibration attenuation of each first presentation object with distance to generate a vibration distance model for this earthquake; according to the vibration distance model, determine the earthquake center corresponding to each first presentation object; Use the intensity data, theoretical magnitude, and earthquake center of each first presentation object to generate a first display instruction for this earthquake; execute the first display instruction to display the urban safety situation of this earthquake in the city.

2. The method for displaying the urban safety situation based on big data according to claim 1, wherein It includes: During the collection time, obtain the induced current corresponding to each electromagnet from the sensors in the building isolation bearings of the collection point; According to the electromagnets with changed induced current, determine the relative position change between the upper bearing plate and the lower bearing plate corresponding to the collection point; Determine the ratio of the relative position change to the collection time as the relative movement speed of the collection point during this earthquake; Use the relative movement speed to calculate the intensity data of the collection point.

3. The method for displaying urban security conditions based on big data according to claim 2, wherein It includes: Obtain the upper electromagnet with a first preset change in the induced current, and according to the position of the obtained upper electromagnet, determine the first relative movement direction and the first relative displacement of the upper bearing plate; Obtain the lower electromagnet with a second preset change in the induced current, and according to the position of the obtained lower electromagnet, determine the second relative movement direction and the second relative displacement of the lower bearing plate; According to the first relative movement direction and the first relative displacement, and the second relative movement direction and the second relative displacement, obtain the relative position change between the upper bearing plate and the lower bearing plate.

4. The method for displaying urban security conditions based on big data according to claim 2, characterized in that, A steel plate is arranged in the slider of the building isolation bearing, and the steel plate cuts the magnetic induction lines between the upper electromagnet and the lower electromagnet as a conductor to generate damping, so that the movement speed of the slider slows down to reduce the movement of the upper bearing plate relative to the lower bearing plate; The method further includes: When an earthquake occurs, obtain the damping value generated by the steel plate cutting the magnetic induction lines as a conductor; Use the damping value to calculate the theoretical shaking amplitude of the building corresponding to the collection point; In the digital twin model, determine the collection point as the second presentation object; Use the theoretical shaking amplitude corresponding to each second presentation object to generate a second display instruction for this earthquake; Execute the second display instruction to display the theoretical shaking amplitude of the building during this earthquake.

5. The method for displaying urban security conditions based on big data according to claim 1, characterized in that It also includes: Determine the areas in the city where building isolation bearings are not installed and the areas where the installation density of building isolation bearings is lower than the threshold as the uncovered areas; Select installable points in the uncovered areas; After installing building isolation bearings at the installable points, determine the locations of the installable points as the newly added collection points in the digital twin model; When an earthquake occurs, determine the intensity data of the newly added collection points; determine the third presentation object of the digital twin model according to the obtained intensity data; Use the theoretical magnitude and the earthquake center corresponding to each of the third presentation objects to generate a third display instruction for this earthquake; execute the third display instruction to update the urban safety situation of this earthquake in the city.

6. The method for displaying urban security conditions based on big data according to claim 5, characterized in that It includes: Determine the scenic area buildings in the uncovered area; wherein, the construction volume of installing building isolation bearings in the scenic area buildings is less than a preset value; Conduct an installation layout of building isolation bearings for the scenic area buildings to obtain the installation quantity of the building isolation bearings required for the scenic area buildings; When the installation quantity is greater than or equal to three, the scenic area buildings pass the collection effectiveness detection; When the scenic area buildings pass the collection effectiveness detection, determine the location where the scenic area buildings are located as an installable point.

7. The method for displaying urban safety conditions based on big data according to any one of claims 1-6, characterized in that, Use the intensity data when the city has earthquakes in history to construct an earthquake wave propagation model of the city; The method includes: Use the obtained intensity data to construct an intensity distribution map; Input the obtained intensity data into the earthquake wave propagation model; the earthquake wave propagation model predicts the theoretical distribution map under different magnitudes; For each collection point, compare the predicted intensity data in the theoretical distribution map with the actually collected intensity data in the intensity distribution map; determine the hit collection points where the difference between the predicted intensity data and the actually collected intensity data in the theoretical distribution map is less than a preset error; when the number of hit collection points is greater than the hit threshold, obtain the theoretical magnitude of each collection point predicted by the theoretical distribution map; Determine the collection points with the obtained theoretical magnitude as the first presentation object.

8. The method for displaying the urban safety situation based on big data according to any one of claims 1-6, characterized in that, The building isolation bearing includes an upper fixing plate, an upper bearing plate, a lower fixing plate and a lower bearing plate; Wherein, the upper fixing plate is fixed on the upper bearing plate, the upper fixing plate bears the building structure, the lower fixing plate is arranged on the foundation, and the lower bearing plate is fixed on the lower fixing plate; the slider is slidably arranged between the upper bearing plate and the lower bearing plate; A plurality of upper electromagnets distributed in an array are arranged in the upper fixing plate, a plurality of lower electromagnets distributed in an array are arranged in the lower fixing plate, and sensors are arranged on the power supply lines of each upper electromagnet and lower electromagnet. The sensors are used to collect the voltage change situation on the power supply lines of the corresponding electromagnets to determine the induced current corresponding to the power supply lines of each electromagnet.

9. An urban safety situation display device based on big data, characterized in that, The big data-based urban safety situation display device includes at least one processor and a memory. The at least one processor and the memory are connected through a data bus. The memory stores instructions executable by the at least one processor. After being executed by the processor, the instructions are used to implement the big data-based urban safety situation display method according to any one of claims 1-8.

10. A non-volatile computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions. The computer-executable instructions are executed by one or more processors to complete the big data-based urban safety situation display method according to any one of claims 1-8.

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