A real-time monitoring system for working displacement and deformation of building shock absorbers

Abstract

The present invention discloses a real-time monitoring system for the working displacement and deformation of a building shock absorber, the system comprising: a seismic sensing device, a local monitoring station, a shock absorber displacement monitoring device, a cloud server, and a remote terminal control and analysis device; the seismic sensing device and the shock absorber displacement monitoring device are front-end operated with data acquisition, storage, and edge computing software. The present invention enables a building adopting energy dissipation and shock absorption measures to obtain the external loads and working displacement information of the energy dissipation shock absorber in real time when subjected to vibration / seismic source conditions such as ambient environmental vibration and seismic vibration within its service life, thereby providing a basis for evaluating the seismic intensity of the building site under various working conditions, the working performance of the shock absorber, and the safety status of the building.

Description

Technical Field

[0001] The invention belongs to the field of building structure health monitoring, and in particular relates to a real-time monitoring system for working displacement and deformation of a building shock absorber when the building adopts anti-seismic measures of energy dissipation and shock reduction. Background Art

[0002] With the development of new seismic isolation materials and technologies, and the improvement of material properties and structural calculation and analysis capabilities, building seismic resistance methods and measures have gradually shifted from enhancing the ability of structural components to resist earthquakes to using seismic isolation technology to consume seismic energy. Among them, the "Seismic Technical Guidelines Based on Maintaining the Normal Use Function of Buildings" (RISN-TG046-2023) proposes that it is necessary to set up earthquake response monitoring systems for buildings using seismic isolation technology and the shock absorbers themselves, and gives relevant regulations for deformation monitoring in the working direction of energy dissipation shock absorbers in Appendix G.

[0003] At present, there is a lack of systematic real-time monitoring equipment and methods for the displacement of shear-type and friction-type damping shock absorbers during their entire life cycle, making it difficult to obtain the full-process ground motion of the building site and the displacement response of the shock absorbers installed on the upper part of the building when an earthquake occurs, and thus it is impossible to analyze the earthquake resistance of the fortified building under different intensities. The current monitoring system for shock absorbers still has the following defects.

[0004] First, the existing technologies for seismic monitoring or focusing on urban areas, or installing vibration sensors on buildings to monitor structural dynamic response, lack details in key technologies such as sensor settings, and it is difficult to obtain accurate seismic effects for dynamic time history analysis of fortified buildings. It is impossible to accurately obtain the accurate seismic intensity required for seismic analysis of fortified buildings, and no clear technical route for obtaining seismic acceleration time history curves is given.

[0005] Second, in view of the large amount of data from earthquake or structural dynamic response, existing technologies mostly use mobile communications or wired communications such as optical fiber. However, when a high-intensity earthquake occurs, local communication towers stop working or partial damage to buildings will cause network cables to be damaged. The above communication methods are prone to communication interruptions between the monitoring system and the outside, or between the modules of the system itself, causing some difficulties in data transmission, such as slow transmission speed or no transmission.

[0006] Third, the prior art does not have detailed steps for data transmission and storage when a high-intensity earthquake occurs. In extreme cases, data storage is easily damaged by earthquakes, resulting in a lack of sufficient backup storage capacity, making it difficult to analyze and process earthquake-related data.

[0007] Fourth, the traditional dynamic strain method has limitations in structural response monitoring and cannot meet the needs of working displacement monitoring of shear-type and friction-type damping shock absorbers. However, there are many types of shock absorbers, and there is currently a lack of specially designed monitoring schemes for different types of shock absorbers, making it difficult to ensure the reliability and applicability of the monitoring schemes. Summary of the invention

[0008] In order to solve the problems in the prior art, the present invention provides a real-time monitoring system for the working displacement and deformation of a building shock absorber, the system comprising a seismic sensing device, a local monitoring station, a shock absorber displacement monitoring device, a cloud server, and a remote terminal control and analysis device;

[0009] The seismic sensing device includes a seismic sensing sensor for acquiring seismic acceleration signals around the building and a first data acquisition and processing device for acquiring, storing and processing the seismic acceleration signals. The data stored in the seismic sensing device is transmitted to a local monitoring station or a cloud server.

[0010] The shock absorber displacement monitoring device comprises a displacement sensor for acquiring a displacement signal of an external shock absorber and a second data acquisition and processing device for acquiring, storing and processing the displacement signal; the data stored in the shock absorber displacement monitoring device is transmitted to a local monitoring station or a cloud server; the displacement sensor measures the displacement of the shock absorber by a high-precision laser triangulation method; and the number of the displacement sensors is 2;

[0011] The local monitoring station receives and stores the received data, and transmits all the stored data to the cloud server; the cloud server stores the received data and plots it into a seismic acceleration time history curve and a shock absorber displacement time history curve; the remote terminal control and analysis device accesses the cloud server to analyze the working performance of the shock absorber;

[0012] The first data acquisition and processing device and the second data acquisition and processing device have the same structure, and both include a data collector, a data storage device, a data processor, a 4G mobile network communication module and a LoRa node; the data collector collects signals from corresponding sensors in real time and stores them in their respective data storage devices;

[0013] The data processor of the first data acquisition and processing device selects whether to send a first instruction to the seismic sensing device and the shock absorber displacement monitoring device and whether to send a second instruction to the local monitoring station according to the seismic acceleration signal; the data processor of the first data acquisition and processing device performs spectrum analysis on the seismic acceleration signal to obtain acceleration spectrum characteristics; the seismic sensing device can transmit its stored data to the local monitoring station through wired transmission or 4G mobile network communication module, and transmit it to the cloud server through the 4G mobile network communication module;

[0014] The data processor of the second data acquisition and processing device performs amplitude analysis and spectrum analysis on the displacement signal stored in the data storage device, obtains and stores the displacement amplitude and displacement spectrum characteristics, and transmits the stored data to the cloud server or the local monitoring station through the 4G mobile network communication module; the number of data collectors of the second data acquisition and processing device is equal to the number of the displacement sensors;

[0015] The LoRa node of the earthquake sensing device sends a first instruction to the shock absorber displacement monitoring device and sends a second instruction to the local monitoring station; the LoRa node of the shock absorber displacement monitoring device is used to receive the first instruction.

[0016] Furthermore, the data storage device includes a first data storage device and a second data storage device; the data collector collects the seismic acceleration signal or displacement signal in the respective sensors in real time and stores it in the respective first data storage devices, and the two data collectors of the second data collection and processing device respectively collect the displacement signals in the two displacement sensors; the data processor of the seismic sensing device determines the absolute value of the seismic acceleration peak value represented by the seismic acceleration signal in its first data storage device, and chooses whether to send a first instruction to the second data storage device of the seismic sensing device and the second data storage device of the shock absorber displacement monitoring device according to the judgment result.

[0017] Further, the acceleration spectrum characteristics are stored in the second data storage device of the earthquake sensing device; when the acceleration spectrum characteristics show that the dominant frequency is inconsistent with the site dominant period, the 4G mobile network communication module of the earthquake sensing device transmits the earthquake acceleration signal and the acceleration spectrum characteristics stored in the second data storage device of the earthquake sensing device to the cloud server and the local monitoring station and saves them; when the acceleration spectrum characteristics show that the dominant frequency is consistent with the site dominant period, the earthquake acceleration signal and the acceleration spectrum characteristics stored in the second data storage device of the earthquake sensing device are transmitted to the local monitoring station through the 4G mobile network communication module and saved.

[0018] When at least one of the displacement amplitudes is greater than or equal to the displacement warning threshold of the shock absorber, the 4G mobile network communication module of the shock absorber displacement monitoring device transmits the displacement signal, two displacement amplitudes and two displacement spectrum characteristics stored in the second data storage device of the shock absorber displacement monitoring device to the cloud server and the local monitoring station and saves them; when both of the displacement amplitudes are less than the displacement warning threshold of the shock absorber, the displacement signal, two displacement amplitudes and two displacement spectrum characteristics stored in the second data storage device of the shock absorber displacement monitoring device are transmitted to the local monitoring station through the 4G mobile network communication module and saved.

[0019] Furthermore, the local monitoring station includes a 4G mobile network data transmission device, a LoRa gateway router, and a local data storage device, and the LoRa gateway router receives a second instruction sent by the earthquake sensing device; when the local monitoring station is inspected and maintained, the LoRa gateway router issues a third instruction to let the shock absorber displacement monitoring device and the earthquake sensing device stop sending data to the local monitoring station.

[0020] Furthermore, the remote terminal control and analysis device accesses the cloud server, and when there are multiple seismic acceleration time-history curves, all the seismic acceleration time-history curves are compared. If all the seismic acceleration time-history curves are inconsistent, the local monitoring station and the seismic sensing device are repaired. If all the seismic acceleration time-history curves are consistent, the seismic acceleration time-history curve is input into the structural calculation software of the remote terminal control and analysis device to obtain a calculated shock absorber displacement time-history curve, and the calculated shock absorber displacement time-history curve is compared with the actual shock absorber displacement time-history curve to obtain a comparison result. According to the comparison result, whether the shock absorber working displacement is normal is analyzed, and the parameter setting of the model in the structural calculation software is improved to correct the model and improve the accuracy of the seismic isolation calculation and analysis of the structural calculation software; and the structural calculation software is used to calculate and verify whether the installation position, quantity or performance of the shock absorber achieves the expected purpose, so that the installation setting of the shock absorber achieves the best shock absorption capacity.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention should conduct a geological survey of the construction site involved to ensure that the seismic sensing device is installed in a suitable position, thereby overcoming the problem of inaccurate and untimely seismic data collection in the prior art, thereby obtaining high-precision seismic acceleration data.

[0023] (2) The building shock absorber displacement monitoring device involved in the present invention has a high-precision and high-frequency displacement sensor installed inside, which overcomes the problems of low sampling frequency and inaccurate data when collecting displacement in some existing technologies, thereby obtaining accurate displacement data of the shock absorber when it is working.

[0024] (3) The seismic acceleration data and shock absorber displacement data storage involved in the present invention adopts multiple backup capabilities. Because strong earthquakes sometimes interfere with or damage network communications and power supply, in extreme cases, mobile networks and city power outages may occur. The present invention uses multiple backup technical means, combined with local area network networking and 4G mobile network joint communication, to achieve the purpose of preserving and communicating seismic acceleration data and shock absorber displacement data under medium and high seismic conditions and high seismic conditions.

[0025] (4) The seismic acceleration data and shock absorber displacement data acquisition and processing device of the present invention has a certain edge analysis capability, which can reduce the time lag problem of cloud computing and remote communication, and solve the problem of real-time data acquisition and safe storage when the mobile network is interrupted due to a high-intensity earthquake.

[0026] (5) The present invention adopts a joint communication mode of mobile network and local area network, which overcomes the problems of data loss caused by a single data transmission mode in the prior art and achieves the purpose of normal data transmission under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Schematic diagram of a real-time deformation monitoring system for a building shock-absorbing damper provided by the present invention.

[0028] Figure 2 : A schematic diagram of a displacement monitoring device of a shear type shock absorbing damper according to the present invention.

[0029] Figure 3 : A schematic diagram of a displacement monitoring device of a tension-compression type shock absorbing damper according to the present invention.

[0030] Figure 4 : Detailed diagram of the displacement sensing device (detailed diagram of the high-precision laser displacement sensor).

[0031] Figure 5 : The present invention relates to a block diagram of the data processing and communication modules of each part of the system.

[0032] Figure 6 : The present invention relates to a schematic diagram for fault diagnosis and maintenance of different equipment results.

[0033] Figure 1 In the figure, the solid line represents wired transmission; the dotted line represents 4G long-distance communication, and the dotted line represents Lora local area communication.

[0034] 1- Earthquake sensing sensor, 2- Site drilling, 3- Earthquake data acquisition and processing device, 4- Local monitoring station, 5- Displacement data acquisition and processing device, 6- Remote terminal control and analysis device.

[0035] Figure 2 Among them, 5-displacement data acquisition and processing device, 7-displacement sensor.

[0036] Figure 3 Among them, 5-displacement data acquisition and processing device, 7-displacement sensor.

[0037] Figure 4Among them, 11-the connecting rod between the shock absorber and the displacement meter, 12-the laser emission fixed end of the laser displacement meter, 13-the laser, 14-the stainless steel protective sleeve, 15-the laser reflection surface, 16-the sliding end of the reflection surface of the displacement meter, 17-the telescopic spring, 18-the sliding end guide rod, 19-the hinged end of the rod and the shock absorber. DETAILED DESCRIPTION

[0038] The present invention is further described and illustrated below in conjunction with specific embodiments. The embodiments are merely exemplary of the present disclosure and do not define the scope of limitation. The technical features of each embodiment of the present invention may be combined accordingly without conflicting with each other.

[0039] The shock absorber in the full text is the energy dissipation shock absorber.

[0040] (I) Main monitoring modules

[0041] 1. A seismic motion sensing device, including a seismic motion sensing sensor 1 and a seismic motion data acquisition and processing device 3. First, drill a hole 2 in an open ground location near the building with the same rock and soil distribution as the foundation. The hole diameter is the same as the traditional soil deep displacement inclination hole, and the hole depth is to the soil layer with the highest shear wave velocity listed in the geotechnical investigation report, or the foundation position of the building. Then place a Cartesian three-axis acceleration sensor at this location and lead the wire out of the ground. One horizontal direction of the sensor should be the same as the direction of the first-order vibration mode of the building, and the Z direction should remain vertical. The sensor frequency should cover the range of 0 to 100 Hz, and the sensitivity should not be less than 0.5mV.s 2 / mm earthquake acceleration measurement capability, and water pressure resistance greater than 0.6MPa. The sensor and the surrounding area of ​​the borehole are densely filled with mortar to ensure that the sensor and the soil layer move together when an earthquake occurs. The collector in the earthquake data acquisition and processing device 3 is responsible for collecting the acceleration signal transmitted by the earthquake sensing sensor 1.

[0042] The seismic data collector, memory and processor, 4G mobile network communication module and LoRa node are integrated in the seismic data collection and processing device, which is in a 24-hour continuous working state. Two high-performance memories are set in the device, one for working data storage, with a data storage space of no less than 72 hours, and the other is a data backup memory, which is used for seismic data backup storage when an earthquake occurs, with a data storage capacity of no less than 30 days.

[0043] 2. Local monitoring station 4 is set up in an open location on the construction site. It includes a 4G mobile network data transmission device, a LoRa gateway router and a local data storage and processing device. It has remote access and control functions, mobile network and local area network data exchange capabilities, local area network control functions, and long-term storage capabilities for earthquake sensing data and shock absorber displacement data.

[0044] 3. The displacement monitoring device of the energy dissipation shock absorber includes a displacement sensor 7 and a displacement data acquisition and processing device 5 installed on the energy dissipation shock absorber, and two displacement sensors 7 are arranged on each energy dissipation shock absorber. The displacement data acquisition and processing device 5 integrates a displacement data collector, a front-end working data storage device, a displacement data backup storage device when an earthquake occurs, a data processor, a 4G mobile network communication module, and a LoRa node. Two high-performance memories are set at the front end. The working data storage device is used for temporary storage of working data and has a data storage space of not less than 72 hours; the displacement data backup storage device when an earthquake occurs is used for backup storage of seismic data when an earthquake occurs, and has a data storage capacity of not less than 30 days.

[0045] Among them, for the shear type shock absorber, the displacement sensor is arranged obliquely along the diagonal line of the shear type shock absorber, and the two ends are fixed at the diagonal position of the shock absorber; for the friction type shock absorber, the displacement sensor is arranged along the deformation direction of the shock absorber, and the two ends are connected to the shock absorber in a hinged form. Each energy dissipation shock absorber is arranged with two displacement sensors 7, which are arranged on the two opposite outer sides of the energy dissipation shock absorber respectively. The two data collectors in the displacement data acquisition and processing device 5 can respectively obtain the displacement signals collected by the two displacement sensors 7. The displacement sensor 7 adopts a high-precision laser triangulation measurement method, with a static displacement accuracy of not less than 0.3mm, a dynamic displacement accuracy of not less than 0.8mm, a measuring range of ±80mm, a sampling frequency of ≥100Hz, and a continuous working service life of not less than 10 years.

[0046] The displacement sensor 7 is composed of a connecting rod 11 between the shock absorber and the displacement meter, a laser emission fixed end 12 of the laser displacement meter, a laser 13, a stainless steel protective sleeve 14, a laser reflection surface 15, a displacement meter reflection surface sliding end 16, a telescopic spring 17, a sliding end guide rod 18, and a rod and shock absorber hinged end 19. Among them, the cross-sectional centers of all equipment are kept on the same central axis. The two sides of the hinged end 19 of the rod and the shock absorber are responsible for fixing the displacement sensor 7 at the fixed positions at both ends of the shock absorber respectively. The laser emission fixed end 12 of the laser displacement meter, the laser 13, the stainless steel protective sleeve 14, the laser reflection surface 15, the displacement meter reflection surface sliding end 16 and the telescopic spring 17 are all installed in the stainless steel protective sleeve 14. The connecting rod 11 between the shock absorber and the displacement meter is responsible for connecting the hinged end 19 of the rod and the shock absorber with one end of the stainless steel protective sleeve 14. The laser emission fixed end 12 of the laser displacement meter is fixed on one side of the stainless steel protective sleeve 14. Figure 4Taking the left side as an example, the sliding end 16 of the reflective surface of the displacement meter is fixed on the other side of the stainless steel protective sleeve 14; the laser 13 is fixed on the laser emission fixed end 12 of the laser displacement meter, the laser reflection surface 15 is fixed on the sliding end 16 of the reflective surface of the displacement meter, the emission end of the laser 13 points to the laser reflection surface 15, the laser reflection surface 15 is responsible for receiving the laser emitted by the laser 13 and performing displacement measurement, the sliding end 16 of the reflective surface of the displacement meter is connected to the sliding end guide rod 18, and can move with the sliding end guide rod 18, the sliding end guide rod 18 is not fixed on the stainless steel protective sleeve 14, the telescopic spring 17 is responsible for fixing the non-working side of the sliding end 16 of the reflective surface of the displacement meter on the other side of the stainless steel protective sleeve 14, the telescopic spring 17 has very small stiffness and only plays a structural role, and the sliding end guide rod 18 is responsible for connecting the sliding end 16 of the reflective surface of the displacement meter and the hinged end 19 of the rod and the shock absorber. The laser is in a 24-hour continuous working mode. When the shock absorber undergoes shear deformation or tensile or compressive deformation under the action of local vibration, the laser reflecting surface of the displacement meter will move with the sliding end. The laser measures the changing distance between the fixed end and the sliding end through the high-frequency laser triangulation method, and finally obtains the displacement deformation of the shock absorber.

[0047] 4. Cloud server (cloud storage and cloud computing), when the engineering site network is working normally, the 4G network is used for data remote communication, cloud storage and cloud computing. The cloud server has the time curve noise processing of ground motion and shock absorber working displacement, peak value and peak-to-peak value basic analysis functions, and can also perform data integration, spectrum analysis and correlation analysis; it has data disaster preparedness functions, network anti-virus and anti-hacker attack capabilities.

[0048] 5. The remote terminal control and analysis device 6 accesses the cloud server to perform scheduled remote maintenance and data download during the daily operation of the monitoring system, and combines the structural design model, the performance indicators of the shock absorber, etc. to analyze the seismic motion and shock absorber displacement monitoring data online, the seismic motion characteristics and the shock absorber working displacement response characteristics and the shock absorber working performance analysis, and puts forward suggestions for optimizing the shock absorption design.

[0049] (II) Communication status of monitoring system

[0050] The monitoring system uses 4G mobile network and LoRa local area network combined wireless communication, and the seismic data acquisition and processing device and the local monitoring station use wired transmission. Among them, the seismic sensing device and the energy dissipation shock absorber displacement monitoring device are equipped with two communication methods, and use 220V mains and front-end battery power supply. The data communication system is shown in the figure below. Figure 5. Among them, the earthquake sensing device is connected to the local monitoring station by wire, the earthquake sensing device is connected to the energy dissipation shock absorber displacement monitoring device through the Lora node, and is connected to the cloud server through the 4G mobile network communication module; the energy dissipation shock absorber displacement monitoring device is connected to the local monitoring station through the Lora node, and is connected to the cloud server through the 4G mobile network communication module; the local monitoring station is connected to the earthquake sensing device by wired connection, the local monitoring station is connected to the energy dissipation shock absorber displacement monitoring device through the Lora gateway router, and is connected to the cloud server through the 4G mobile network data transmission device; the earthquake sensing device and the local monitoring station are connected through 4G, and the shock absorber displacement monitoring device and the local monitoring station are connected through 4G; the cloud server is connected to the earthquake sensing device through the 4G mobile network communication module, connected to the energy dissipation shock absorber displacement monitoring device through the 4G mobile network communication module, and connected to the local monitoring station through the 4G mobile network data transmission device, and presents the working data of each part to the remote terminal control and analysis device; the remote terminal control and analysis device can obtain the working status of the entire system by accessing the cloud server. Because strong earthquakes sometimes cause interference or damage to network communications and power supply, and in extreme cases may cause mobile network and city power outages, the seismic and displacement data storage has multiple backup capabilities. Through the progressive backup of front-end work temporary storage, backup storage, local monitoring station storage and cloud server storage, local LAN networking and 4G mobile network joint communication, data storage and communication capabilities under high-intensity earthquakes are ensured.

[0051] Combined with the news released by the National Seismic Network and the processing result of the seismic data processor, the working conditions of the system are divided into low seismic working conditions, medium and high seismic working conditions, and high seismic working conditions.

[0052] 1. Low ground vibration working conditions

[0053] Low ground motion condition refers to the absolute value of the peak ground motion acceleration |A g |<22mm / s 2 , three data collectors respectively collect the seismic acceleration signal in the seismic sensing sensor and the displacement signal in the displacement sensor, one data collector collects the seismic acceleration signal in the seismic sensing sensor, and two data collectors respectively collect the displacement signals in the two displacement sensors, and store them cyclically in their respective first data storage devices; each seismic acceleration signal and the displacement signal are stored for no less than 72 hours; the data processor of the seismic sensing sensor determines whether the absolute value of the seismic acceleration peak in the first data storage device is less than 22 mm / s 2 , when the acceleration is less than 22 mm / s 2When the seismic network does not send earthquake information within 400km around the monitored building to the cloud server, the first data storage device of the seismic sensing device transmits the seismic acceleration signal to the local monitoring station by wired transmission, and the work of the monitoring system ends;

[0054] When the earthquake source announced by the National Seismic Network occurs within 400km around the monitoring building, the absolute value of the peak value of the earthquake acceleration in any horizontal direction | A g |<22mm / s 2 At this time, the cloud server obtains earthquake data from the seismic network, and sends a collection instruction directly to the 4G mobile network communication module of the seismic sensing device and the energy dissipation shock absorber displacement monitoring device (shock absorber displacement monitoring device) through the 4G mobile network. At the same time, the seismic sensing device instructs the local monitoring station to record the current time; the second data storage device of the seismic sensing device extracts the acceleration signal 0.5 hours before the current time from the first data storage device, and extracts the acceleration signal 1 hour after the current time from the first data storage device in real time (when the second data storage device extracts the data before the current time from the first data storage device, it extracts from back to front in reverse order, and when the second data storage device extracts the data after the current time from the first data storage device in real time, the data is extracted in real time as the storage proceeds), and the storage time is not less than 30 days; the second data storage device of the seismic sensing device transmits the seismic acceleration signal to the local monitoring station through the 4G mobile network communication module; at the same time, the second data storage device of the energy dissipation shock absorber displacement monitoring device extracts the acceleration signal from the first data storage device The displacement signals stored in the two displacement sensors are respectively extracted from the storage device (that is, the displacement signals collected by the two data collectors from the two displacement sensors and stored in the first data storage device), and the displacement signals 0.5 hours before the current moment are extracted, and the displacement signals 1 hour after the current moment are extracted from the first data storage device in real time, and the storage time is not less than 30 days; the second data storage device of the energy dissipation shock absorber displacement monitoring device transmits the displacement signal to the local monitoring station through the 4G mobile network communication module; the local data storage device of the local monitoring station stores the received seismic acceleration signal and displacement signal, and then transmits the signals stored in the local monitoring station to the cloud server through the 4G mobile network data transmission device and stores them, and the cloud server draws a vibration acceleration time history curve and two energy dissipation shock absorber displacement time history curves (shock absorber displacement time history curves); if the two displacement time history curves drawn by the cloud server are inconsistent after the two displacement sensors of the shock absorber obtain the displacement signal, the shock absorber displacement monitoring device and the local monitoring station are repaired, such as Figure 6As shown. The remote terminal control and analysis device accesses the cloud server, inputs the earthquake acceleration time history curve into the structural calculation software in the remote terminal control and analysis device to obtain the calculated energy dissipation shock absorber displacement time history curve, compares the calculated value with the actual value, and obtains the comparison result; the remote terminal control and analysis device analyzes whether the shock absorber working displacement is normal based on the comparison result, improves the model parameter setting in the structural calculation software, so that the software calculation result is the same as the measured value, achieves the purpose of correcting the model, and improves the accuracy of the software's seismic isolation calculation analysis. The software can also be used to calculate and verify whether the installation location, quantity or performance of the energy dissipation shock absorber meets the expected purpose, so that the installation setting of the shock absorber can achieve the best shock absorption effect.

[0055] 2. Medium to high ground vibration working conditions

[0056] Medium and high ground motion conditions refer to the absolute value of the peak ground motion acceleration |A g |At 22mm / s 2 ≤ Absolute value of peak seismic acceleration|A g |≤45mm / s 2 When the earthquake sensing device is within the range of 22 mm / s, the data collector of the earthquake sensing device collects the earthquake acceleration signal and stores it in the first data storage device of the earthquake sensing device; the data processor of the earthquake sensing device determines the absolute value of the earthquake acceleration peak value represented by the earthquake acceleration signal stored in the first data storage device. 2 ≤ Absolute value of peak seismic acceleration|A g |≤45mm / s 2 When the earthquake occurs, the second data storage of the earthquake sensing device extracts the acceleration signal of 0.5 hours before the current moment from the first data storage device, and extracts the acceleration signal of 1 hour after the current moment from the first data storage device in real time, and the storage time is not less than 3 months; the data processor of the earthquake sensing device performs spectrum analysis on the earthquake acceleration signal stored in the second data storage device, obtains the acceleration spectrum characteristics and stores them in the second data storage device,

[0057] If the acceleration spectrum characteristics show that the dominant frequency is inconsistent with the site's dominant period, the acceleration signal and acceleration spectrum characteristics in the second data storage of the earthquake sensing device are transmitted to the cloud server and the local monitoring station (preferentially to the cloud server) through the 4G mobile network communication module, and the local monitoring station stores the received data, and then transmits the received data to the cloud server through the 4G mobile network data transmission device; at the same time, the LoRa node of the earthquake sensing device sends a collection instruction to the LoRa node of the energy dissipation shock absorber displacement monitoring device, and the second data storage of the energy dissipation shock absorber displacement monitoring device extracts the displacement signals stored in the two displacement sensors from the first data storage of the energy dissipation shock absorber displacement monitoring device (that is, the two data collectors collect the displacement signals from the two displacement sensors and store them in the first data storage), and both extract the displacement signals 0.5 hours before the current moment, and extract the displacement signals 1 hour after the current moment from the first data storage in real time, and the storage time is not less than 3 months; the data processor of the energy dissipation shock absorber displacement monitoring device performs amplitude analysis and spectrum analysis on the displacement signals of the two displacement sensors stored in the second data storage, and obtains two displacement amplitudes and two displacement spectrum characteristics (one The displacement signal collected by the displacement sensor can generate a displacement amplitude and a frequency spectrum feature) and is stored in the second data storage device (the storage time is not less than 3 months); if the larger displacement amplitude or the two displacement amplitudes are simultaneously greater than or equal to the displacement warning threshold of the shock absorber, and the dominant frequency thereof is close to or the same as the natural frequency of the structure (there is no inconsistency in the dominant frequency of the displacement amplitude), the displacement signals, two displacement amplitudes and two displacement frequency spectrum features of the two displacement sensors in the second data storage device are transmitted to the cloud server and the local monitoring station (given priority to the cloud server) through the 4G mobile network communication module; the cloud service The device receives and stores the data sent by the local monitoring station, the earthquake sensing device and the energy dissipation shock absorber displacement monitoring device, draws two earthquake acceleration time history curves and four energy dissipation shock absorber displacement time history curves and saves them. If the two earthquake acceleration time history curves are inconsistent, the local monitoring station and the earthquake sensing device are repaired. If the displacement time history curves drawn by the cloud server are inconsistent after the two displacement sensors of the shock absorber obtain the displacement signal, the shock absorber displacement monitoring device is repaired; if the shock absorber displacement time history curves of the local monitoring station and the shock absorber are inconsistent, the local monitoring station and the shock absorber displacement monitoring device are repaired. Figure 6 shown.

[0058] If the two earthquake acceleration time history curves are consistent, the remote terminal control and analysis device inputs the earthquake acceleration time history curve into the structural calculation software in the remote terminal control and analysis device to obtain the calculated energy dissipation shock absorber displacement time history curve, compares the calculated value with the actual value, and obtains the comparison result; the remote terminal control and analysis device analyzes whether the shock absorber working displacement is normal based on the comparison result, improves the model parameter setting in the structural calculation software, so that the software calculation result is close to the true value, achieves the purpose of correcting the model, and improves the accuracy of the software's seismic isolation calculation and analysis. The software can also be used to calculate and verify whether the installation location, quantity or performance of the energy dissipation shock absorber meets the expected purpose, so that the installation setting of the shock absorber can achieve the best shock absorption effect. At this time, the staff will record the acceleration and acceleration spectrum characteristics (analysis results), go to the site to confirm the operation of the building and determine the source category.

[0059] If the acceleration spectrum characteristic shows that the dominant frequency is inconsistent with the site's dominant period, and both displacement amplitudes are less than the displacement warning threshold of the shock absorber, the acceleration signal and acceleration spectrum characteristic in the second data storage of the earthquake sensing device are transmitted to the cloud server and the local monitoring station (given priority to the cloud server) through the 4G mobile network communication module, and at the same time, the energy dissipation shock absorber displacement monitoring device transmits the displacement signals, two displacement amplitudes and two displacement spectrum characteristics of the two displacement sensors in the second data storage to the local monitoring station through the 4G mobile network communication module; the local monitoring station receives and stores the data storage of the earthquake sensing device and the energy dissipation shock absorber displacement monitoring device, and then transmits the received data to the cloud server through the 4G mobile network data transmission device; The cloud server receives and stores the data sent by the earthquake sensing device and the local monitoring station, draws two earthquake acceleration time-history curves and two energy dissipation shock absorber displacement time-history curves and saves them. If the two earthquake acceleration time-history curves are inconsistent, the local monitoring station and the earthquake sensing device are repaired. If the two earthquake acceleration time-history curves are consistent, the remote terminal control and analysis device inputs the earthquake acceleration time-history curve into the structural calculation software in the remote terminal control and analysis device to obtain the calculated energy dissipation shock absorber displacement time-history curve, compares the calculated value with the actual value, and obtains the comparison result; if the displacement time-history curves drawn by the cloud server are inconsistent after the two displacement sensors of the shock absorber obtain the displacement signal, the local monitoring station and the shock absorber displacement monitoring device are repaired, such as Figure 6As shown. The remote terminal control and analysis device analyzes whether the working displacement of the shock absorber is normal based on the comparison results, and improves the model parameter settings in the structural calculation software so that the software calculation results are the same as the measured values, thereby achieving the purpose of correcting the model and improving the accuracy of the software's seismic isolation calculation and analysis. The software can also be used to calculate and verify whether the installation location, quantity or performance of the energy dissipation shock absorber has achieved the expected purpose, so that the installation setting of the shock absorber can achieve the best shock absorption effect. At this time, the staff will record the acceleration and acceleration spectrum characteristics (analysis results), go to the site to confirm the operation of the building and determine the source category.

[0060] If the acceleration spectrum characteristics show that the dominant frequency is consistent with the dominant period of the site, the seismic acceleration time-course signal and the acceleration spectrum characteristics in the second data storage device of the seismic sensing device are transmitted to the local monitoring station through the 4G mobile network communication module, the LoRa node of the seismic sensing device sends an instruction to the LoRa gateway router of the local monitoring station, and the local data storage device records the current time; at the same time, if the larger displacement amplitude of the shock absorber or the two displacement amplitudes are simultaneously greater than or equal to the displacement warning threshold of the shock absorber, and its dominant frequency is close to or the same as the natural frequency of the structure, the displacement signals, two displacement amplitudes and two displacement spectrum characteristics of the two displacement sensors in the second data storage device of the energy dissipation shock absorber displacement monitoring device are transmitted through the 4G mobile network communication module. The data is transmitted to the cloud server and the local monitoring station (given priority to the cloud server); the local monitoring station receives and stores the data sent by the data storage device of the earthquake sensing device and the data storage device of the shock absorber displacement monitoring device, and then transmits the received data to the cloud server through the 4G mobile network data transmission device; the cloud server receives and stores the data sent by the energy dissipation shock absorber displacement monitoring device and the local monitoring station, draws a earthquake acceleration time history curve and four energy dissipation shock absorber displacement time history curves and saves them. If the displacement time history curves drawn by the cloud server are inconsistent after the two displacement sensors of the shock absorber obtain the displacement signal, the shock absorber displacement monitoring device is repaired. If the shock absorber displacement time history curves of the local monitoring station and the shock absorber are inconsistent, the local monitoring station and the shock absorber displacement monitoring device are repaired. Figure 6 As shown. The remote terminal control and analysis device inputs the earthquake acceleration time history curve into the structural calculation software in the remote terminal control and analysis device to obtain the calculated energy dissipation shock absorber displacement time history curve, compares the calculated value with the actual value, and obtains the comparison result; the remote terminal control and analysis device analyzes whether the shock absorber working displacement is normal based on the comparison result, and improves the model parameter setting in the structural calculation software so that the software calculation result is the same as the measured value, so as to achieve the purpose of correcting the model and improve the accuracy of the software's seismic isolation calculation and analysis. The software can also be used to calculate and verify whether the installation position, quantity or performance of the energy dissipation shock absorber meets the expected purpose, so that the installation setting of the shock absorber can achieve the best shock absorption effect.

[0061] If the acceleration spectrum characteristics show that the dominant frequency is consistent with the site's dominant period, and both displacement amplitudes are less than the displacement warning threshold of the shock absorber, the local monitoring station receives and stores the data sent by the seismic sensing device and the energy dissipation shock absorber displacement monitoring device, and then transmits the received data to the cloud server through the 4G mobile network data transmission device; the cloud server receives and stores the data sent by the local monitoring station, draws a seismic acceleration time history curve and two energy dissipation shock absorber displacement time history curves and saves them. If the displacement time history curves drawn by the cloud server are inconsistent after the two displacement sensors of the shock absorber obtain the displacement signal, the local monitoring station and the shock absorber displacement monitoring device are repaired, such as Figure 6 As shown. The remote terminal control and analysis device inputs the earthquake acceleration time history curve into the structural calculation software in the remote terminal control and analysis device to obtain the calculated energy dissipation shock absorber displacement time history curve, compares the calculated value with the actual value, and obtains the comparison result; the remote terminal control and analysis device analyzes whether the shock absorber working displacement is normal based on the comparison result, and improves the model parameter setting in the structural calculation software so that the software calculation result is the same as the measured value, so as to achieve the purpose of correcting the model and improve the accuracy of the software's seismic isolation calculation and analysis. The software can also be used to calculate and verify whether the installation position, quantity or performance of the energy dissipation shock absorber meets the expected purpose, so that the installation setting of the shock absorber can achieve the best shock absorption effect.

[0062] 3. High ground vibration working conditions

[0063] High ground motion conditions refer to the absolute value of the peak ground motion acceleration |A g |>45mm / s 2 At this time, the working condition of the monitoring system is consistent with the working condition of the monitoring system under the medium and high earthquake working conditions, but the second data storage device of the earthquake sensing device extracts the acceleration signal 1 hour before the current moment from the first data storage device, and extracts the acceleration signal 3 hours after the current moment from the first data storage device in real time, and the storage time is not less than 3 months; the second data storage device of the energy dissipation shock absorber displacement monitoring device extracts the displacement signals stored in the two displacement sensors from the first data storage device of the energy dissipation shock absorber displacement monitoring device (that is, the two data collectors collect the displacement signals from the two displacement sensors and store them in the first data storage device), and both extract the displacement signal 1 hour before the current moment, and extract the displacement signal 3 hours after the current moment from the first data storage device in real time, and the storage time is not less than 3 months.

[0064] In the case of a major earthquake, the energy dissipation shock absorber may be damaged, and even the building structure may be damaged under the action of the earthquake. The monitoring system can obtain the seismic acceleration time history curve and the energy dissipation shock absorber displacement time history curve composed of all displacement signals before the shock absorber is damaged. The seismic acceleration time history curve is input into the structural calculation software to observe whether the model can also reflect the damage of the building, and observe the difference between the actual work of the shock absorber and the experimental design. The calculation model can be modified, and the shock absorption and isolation technology can also be improved. The data obtained can reflect the real seismic motion of the foundation and the real movement of the building, so as to judge the safety performance of the building.

[0065] The remote terminal control and analysis device analyzes whether the working displacement of the shock absorber is normal based on the comparison results. Specifically, after obtaining the shock absorber displacement time curve, the staff compares the time curve with the displacement of the shock absorber during design and the maximum displacement limit of the product hysteresis curve provided by the manufacturer (the maximum displacement limit will be reflected in the hysteresis curve in the product manual) to determine whether the shock absorber is working normally and then determine the working life.

[0066] When the 4G network is in poor condition, data transmission via the 4G network is suspended, and data is read manually on site when on-site conditions permit.

[0067] Maintenance and repair:

[0068] During daily work or after an extreme situation occurs, inspect the data storage device, send instructions through the local area network or 4G mobile network to enable the data storage device to send data, and observe whether the data storage device can work normally.

[0069] When inspecting the local monitoring station, a command is sent to the seismic sensing device through wired transmission or Lora LAN communication to interrupt the signal transmission from the seismic sensing device to the local monitoring station. A command is sent to the energy dissipation shock absorber displacement monitoring device through Lora LAN communication to interrupt the signal transmission from the energy dissipation shock absorber displacement monitoring device to the local monitoring station. The connection between the seismic sensing device and the energy dissipation shock absorber displacement monitoring device and the cloud server remains unchanged.

[0070] The following figures are combined to further illustrate the specific implementation of the present invention. The system installation and debugging are mainly implemented according to the following five steps.

[0071] Step 1: Check the site category wave velocity test results in the "Geotechnical Engineering Investigation Report" of the construction site, determine the soil layer depth with the highest shear wave velocity, drill holes on site and bury PVC pipes with a diameter of 80-100mm in the soil layer, with one pair of grooves parallel to the direction of the first vibration mode of the building, and fill the area around the pipes densely.

[0072] Step 2: Place a set of three-axis seismic acceleration sensors 1 at the bottom of the pipe, adjust one of the horizontal sensors to be in the same direction as the first-order vibration mode of the building, lead its wire out of the pipe mouth and connect it to the seismic data acquisition and processing device 3, and then debug the equipment. The seismic data acquisition and processing device is set with two levels of thresholds, the first level peak threshold |A g1 |=22mm / s 2 , the second level peak threshold |A g2 |=45mm / s 2 .

[0073] Step 3: Set up a local monitoring station near the seismic data acquisition and processing device, connect to the wired network and stable Wi-Fi network, connect to 220V AC power and battery power supply, and connect the seismic data acquisition and processing device 3 and the local monitoring station 4.

[0074] Step 4: Install a displacement monitoring device on one or more shock absorbers of the building according to the design requirements. For example, for the working displacement monitoring of the shear type shock absorber, the displacement sensor 7 is arranged obliquely along the diagonal of the shear type shock absorber, and the two ends are fixed at the diagonal positions of the shock absorber. At the same time, a displacement sensor and a data collector are arranged on both sides of the shock absorber to ensure that the monitoring capability has a certain redundancy (in order to ensure the normal operation of the system and increase the survival probability, the shock absorber displacement monitoring device will be equipped with a sturdy casing, and a displacement sensor and a data collector will be arranged on the front and back sides (opposite sides) of each shock absorber to ensure the operation of the system). Connect to the 220V AC power supply and the battery, and connect the displacement sensor and the displacement data acquisition and processing device ( Figure 2 or Figure 3 ).

[0075] Step 5: Remote cloud service communication debugging, matching the server software parameters with the front-end collector settings. This includes the unique numbers of buildings, shock absorbers, earthquake sensors, displacement meters, the range and sensitivity of each device, and the matching of the earthquake acceleration perception peak threshold ( Figure 1 ) etc. After the equipment and system are debugged, fill the area around the seismic sensor with quick-hardening cement mortar.

[0076] If the monitoring system has been established, all modules are in normal working state 24 hours a day, and the power supply system and 4G mobile network are working normally. At a certain moment, the seismic sensor buried below the ground senses the peak acceleration of the seismic motion in the same direction as the first-order vibration mode of the building |A g |≥22mm / s 2 , less than or equal to 45mm / s 2 , the seismic data acquisition and processing device starts working, extracting the seismic acceleration peak value exceeding |A in the working memory g1|The seismic acceleration data 0.5 hours before the threshold moment and no more than 1 hour thereafter are saved in the backup memory. At the same time, instructions are sent to the LoRa LAN router and each node, and the second memory of the shock absorber displacement monitoring device extracts the shock absorber displacement data 0.5 hours before the instruction moment and no more than 1 hour thereafter and saves it in the memory.

[0077] If the city power and mobile network are working normally, the data acquisition and processing devices of the earthquake sensing device and the shock absorber displacement monitoring device will transmit data to the local monitoring station through the 4G mobile network module. Then each device will remotely transmit the backup data to the cloud server through the 4G mobile network. If the city power is cut off or the mobile network is interrupted, the displacement data acquisition and processing device will stop mobile network communication and data transmission, stop edge computing, and the staff will extract data on site.

[0078] When the city power is working normally and the local workstation and the data acquisition and processing devices have not received any earthquake information instructions from the seismic network, the seismic data acquisition and processing device performs FFT analysis on the time-course signal composed of the first 1024 and last 2048 time-course data of the seismic motion exceeding the threshold value. When it is found that the dominant frequency of the seismic motion is far away from the dominant frequency of the site, it sends a command to the shock absorber displacement monitoring device through the local area network to collect the displacement data of the shock absorber, and at the same time sends an unknown earthquake source prompt to the user so that the non-seismic source can be found in time.

[0079] If the displacement amplitude of the displacement time history curve exceeds the displacement warning threshold of the shock absorber, when the displacement data acquisition and processing device performs FFT analysis on the time history signal composed of the 1024 and 2048 time history data before and after the backup and storage of the instruction time, and finds that the dominant frequency of the displacement spectrum is close to or the same as the natural frequency of the structure, the remote control center will send SMS or WeChat push notifications to the entrusting unit or user through the 4G mobile network to confirm the appearance status of the building structure.

[0080] Technical personnel routinely access the cloud server through remote terminal control and analysis devices to obtain seismic motion and shock absorber displacement monitoring data. After obtaining the shock absorber displacement time-history curve, the technical personnel compare the shock absorber displacement time-history curve with the displacement of the shock absorber during design and the maximum displacement limit of the product hysteresis curve provided by the manufacturer to determine whether the shock absorber is working properly and then determine the service life. Combined with the structural design model and the performance indicators of the shock absorber, the technical personnel conduct analysis to evaluate the seismic motion characteristics and the shock absorber working displacement response characteristics, and provide suggestions for the shock absorber working performance analysis and optimization of the shock absorption design.

[0081] The above description only considers the working conditions of one earthquake sensing device and one displacement monitoring device set on a shock absorber in the building of the system. Among them, the shock absorber displacement monitoring device includes two displacement sensors and two data collectors, which can collect displacement signals on both sides of the shock absorber. When the building adopts this monitoring system, the number of earthquake sensing devices arranged and the number of shock absorbers arranged in the building are adjusted according to the specific project and relevant specifications.

[0082] The above only illustrates one working condition of the monitoring system. The above embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A real-time monitoring system for working displacement and deformation of building shock absorbers, characterized in that: The system includes a seismic sensing device, a local monitoring station, a shock absorber displacement monitoring device, a cloud server, and a remote terminal control and analysis device; The seismic sensing device includes a seismic sensing sensor for acquiring seismic acceleration signals around the building and a first data acquisition and processing device for acquiring, storing and processing the seismic acceleration signals. The data stored in the seismic sensing device is transmitted to a local monitoring station or a cloud server. The shock absorber displacement monitoring device comprises a displacement sensor for acquiring a displacement signal of an external shock absorber and a second data acquisition and processing device for acquiring, storing and processing the displacement signal; the data stored in the shock absorber displacement monitoring device is transmitted to a local monitoring station or a cloud server; the displacement sensor measures the displacement of the shock absorber by a high-precision laser triangulation method; and the number of the displacement sensors is 2; The local monitoring station receives and stores the received data, and transmits all the stored data to the cloud server; the cloud server stores the received data and plots it into a seismic acceleration time history curve and a shock absorber displacement time history curve; the remote terminal control and analysis device accesses the cloud server to analyze the working performance of the shock absorber; The first data acquisition and processing device and the second data acquisition and processing device have the same structure, and both include a data collector, a data storage device, a data processor, a 4G mobile network communication module and a LoRa node; the data collector collects signals from corresponding sensors in real time and stores them in their respective data storage devices; The data processor of the first data acquisition and processing device selects whether to send a first instruction to the seismic sensing device and the shock absorber displacement monitoring device and whether to send a second instruction to the local monitoring station according to the seismic acceleration signal; the data processor of the first data acquisition and processing device performs spectrum analysis on the seismic acceleration signal to obtain acceleration spectrum characteristics; the seismic sensing device can transmit its stored data to the local monitoring station through wired transmission or 4G mobile network communication module, and transmit it to the cloud server through the 4G mobile network communication module; The data processor of the second data acquisition and processing device performs amplitude analysis and spectrum analysis on the displacement signal stored in the data storage device, obtains and stores the displacement amplitude and displacement spectrum characteristics, and transmits the stored data to the cloud server or the local monitoring station through the 4G mobile network communication module; the number of data collectors of the second data acquisition and processing device is equal to the number of the displacement sensors; The LoRa node of the earthquake sensing device sends a first instruction to the shock absorber displacement monitoring device and sends a second instruction to the local monitoring station; the LoRa node of the shock absorber displacement monitoring device is used to receive the first instruction; The data storage device includes a first data storage device and a second data storage device; the data collector collects the seismic acceleration signal or displacement signal in the respective sensors in real time and stores them in the respective first data storage devices; the two data collectors of the second data collection and processing device collect the displacement signals in the two displacement sensors respectively; the data processor of the seismic sensing device determines the magnitude of the absolute value of the seismic acceleration peak value represented by the seismic acceleration signal in its first data storage device, and selects whether to send a first instruction to the second data storage device of the seismic sensing device and the second data storage device of the shock absorber displacement monitoring device according to the determination result; Absolute value of the local vibration acceleration peak value |A g | Less than 22mm / s 2 When the seismic network sends an earthquake message within 400km around the monitoring building to the cloud server, the second data storage device of the seismic sensing device receives the first instruction and extracts the seismic acceleration signal 0.5 hours before the current moment from the first data storage device, and extracts the seismic acceleration signal 1 hour after the current moment from the first data storage device in real time, and the storage time is not less than 30 days. At the same time, the LoRa node of the seismic sensing device sends a second instruction to the LoRa gateway router of the local monitoring station, so that the local monitoring station records the current time; The second data storage device of the earthquake sensing device transmits the earthquake acceleration signal to the local monitoring station through the 4G mobile network communication module; Absolute value of the local vibration acceleration peak value |A g | Less than 22mm / s 2 When the seismic network does not send earthquake information within 400km around the monitoring building, the first data storage device of the seismic sensing device transmits the seismic acceleration signal to the local monitoring station by wired transmission; Absolute value of the local vibration acceleration peak value |A g | Greater than or equal to 22mm / s 2 And less than or equal to 45mm / s 2 At this time, the second data storage device of the seismic sensing device receives the first instruction and extracts the seismic acceleration signal 0.5 hours before the current moment from its first data storage device, and extracts the seismic acceleration signal 1 hour after the current moment from the first data storage device in real time, and the storage time is not less than 3 months. At the same time, the LoRa node of the seismic sensing device sends the second instruction to the LoRa gateway router of the local monitoring station, so that the local monitoring station records the current time; at the same time, the data processor of the seismic sensing device performs spectrum analysis on the seismic acceleration signal in the first data storage device to obtain acceleration spectrum characteristics; Absolute value of the local vibration acceleration peak value |A g |More than 45mm / s 2 , the second data storage device of the earthquake sensing device receives the first instruction and extracts the earthquake acceleration signal 1 hour before the current moment from the first data storage device, and extracts the earthquake acceleration signal 3 hours after the current moment from the first data storage device in real time, and the storage time is not less than 3 months. At the same time, the LoRa node of the earthquake sensing device sends a second instruction to the LoRa gateway router of the local monitoring station, so that the local monitoring station records the current time; The data processor of the earthquake sensing device performs spectrum analysis on the earthquake acceleration signal in the first data storage device to obtain acceleration spectrum characteristics; Absolute value of the local vibration acceleration peak value |A g |<22mm / s 2 When the seismic network sends an earthquake message within 400km around the monitoring building to the cloud server, the second data storage device of the shock absorber displacement monitoring device receives the first instruction and extracts the displacement signal 0.5 hours before the current moment from its own first data storage device, and extracts the displacement signal 1 hour after the current moment from the first data storage device in real time, and the storage time is not less than 30 days, and the second data storage device of the shock absorber displacement monitoring device extracts the data collected by the two data collectors from the first data storage device respectively, and the second data storage device of the shock absorber displacement monitoring device transmits the displacement signal to the local monitoring station through the 4G mobile network communication module; Absolute value of the local vibration acceleration peak value |A g | Greater than or equal to 22mm / s 2 And less than or equal to 45mm / s 2 When the first instruction is received, the second data storage of the shock absorber displacement monitoring device receives the first instruction and extracts the displacement signal of 0.5 hours before the current moment from the first data storage device, and extracts the displacement signal of 1 hour after the current moment from the first data storage device in real time, and the storage time is not less than 3 months, and the second data storage device of the shock absorber displacement monitoring device extracts the data collected by the two data collectors from the first data storage device respectively; at the same time, the data processor of the shock absorber displacement monitoring device performs amplitude analysis and spectrum analysis on the displacement signal stored in the second data storage device to obtain two displacement amplitudes and two displacement spectrum features; Absolute value of the local vibration acceleration peak value |A g |More than 45mm / s 2 When the first instruction is received, the second data storage device of the shock absorber displacement monitoring device receives the first instruction and extracts the displacement signal of 1 hour before the current moment from the first data storage device, and extracts the displacement signal of 3 hours after the current moment from the first data storage device in real time. The storage time is not less than 3 months, and the second data storage device of the shock absorber displacement monitoring device extracts the data collected by the two data collectors from the first data storage device respectively; at the same time, the data processor of the shock absorber displacement monitoring device performs amplitude analysis and spectrum analysis on the displacement signal stored in the second data storage device to obtain two displacement amplitudes and two displacement spectrum characteristics.

2. The real-time monitoring system for working displacement and deformation of building shock absorbers according to claim 1 is characterized in that: The acceleration spectrum characteristics are stored in the second data storage device of the seismic sensing device; when the acceleration spectrum characteristics show that the dominant frequency is inconsistent with the site's dominant period, the 4G mobile network communication module of the seismic sensing device transmits the seismic acceleration signal and the acceleration spectrum characteristics stored in the second data storage device of the seismic sensing device to the cloud server and the local monitoring station and saves them; when the acceleration spectrum characteristics show that the dominant frequency is consistent with the site's dominant period, the seismic acceleration signal and the acceleration spectrum characteristics stored in the second data storage device of the seismic sensing device are transmitted to the local monitoring station through the 4G mobile network communication module and saved. When at least one of the displacement amplitudes is greater than or equal to the displacement warning threshold of the shock absorber, the 4G mobile network communication module of the shock absorber displacement monitoring device transmits the displacement signal, two displacement amplitudes and two displacement spectrum characteristics stored in the second data storage device of the shock absorber displacement monitoring device to the cloud server and the local monitoring station and saves them; when both of the displacement amplitudes are less than the displacement warning threshold of the shock absorber, the displacement signal, two displacement amplitudes and two displacement spectrum characteristics stored in the second data storage device of the shock absorber displacement monitoring device are transmitted to the local monitoring station through the 4G mobile network communication module and saved.

3. The real-time monitoring system for working displacement and deformation of building shock absorbers according to claim 1 is characterized in that: The local monitoring station includes a 4G mobile network data transmission device, a LoRa gateway router, and a local data storage device. The LoRa gateway router receives a second instruction sent by a seismic sensing device. When the local monitoring station is inspected and repaired, the LoRa gateway router issues a third instruction to the shock absorber displacement monitoring device and the seismic sensing device to stop sending data to the local monitoring station.

4. The real-time monitoring system for working displacement and deformation of building shock absorbers according to claim 1 is characterized in that: The cloud server draws a seismic acceleration time history curve according to the seismic acceleration signal in the received data, and draws a shock absorber working displacement time history curve according to the displacement signal in the received data, and saves the seismic acceleration time history curve and the shock absorber working displacement time history curve.

5. The real-time monitoring system for working displacement and deformation of building shock absorbers according to claim 4 is characterized in that: The remote terminal control and analysis device accesses the cloud server, and when there are multiple earthquake acceleration time-history curves, all earthquake acceleration time-history curves are compared. If all earthquake acceleration time-history curves are inconsistent, the local monitoring station and the earthquake sensing device are repaired. If all earthquake acceleration time-history curves are consistent, the earthquake acceleration time-history curve is input into the structural calculation software of the remote terminal control and analysis device to obtain a calculated shock absorber displacement time-history curve, and the calculated shock absorber displacement time-history curve is compared with the actual shock absorber displacement time-history curve to obtain a comparison result. According to the comparison result, it is analyzed whether the shock absorber working displacement is normal, and the parameter setting of the model in the structural calculation software is improved to correct the model and improve the accuracy of the seismic isolation calculation analysis of the structural calculation software; And use structural calculation software to calculate and verify whether the location, quantity or performance of the shock absorber installation meets the expected purpose, so that the installation setting of the shock absorber can achieve the best shock absorption capacity.

6. The real-time monitoring system for working displacement and deformation of building shock absorbers according to claim 1 is characterized in that: The displacement sensor comprises a connecting rod between the shock absorber and the displacement meter, and a laser displacement meter. The laser displacement meter comprises a laser and a laser reflection surface that are arranged opposite to each other, and a sliding end guide rod. One end of the laser displacement meter is hinged to the shock absorber through the connecting rod, and the other end of the laser displacement meter is hinged to the shock absorber through the sliding end guide rod. When the shock absorber undergoes displacement changes, the sliding end guide rod drives the laser reflection surface to move, and the displacement of the shock absorber at the current moment is calculated by measuring the time when the laser is emitted and received. When the shock absorber is a shear type shock absorber, the displacement sensor is arranged obliquely along the diagonal line of the shear type shock absorber; when the shock absorber is a friction type shock absorber, the displacement sensor is arranged along the deformation direction of the shock absorber.

7. The real-time monitoring system for working displacement and deformation of building shock absorbers according to claim 1 is characterized in that: The seismic sensing sensor is a Cartesian three-axis acceleration sensor, which is arranged at the point with the maximum amplitude of the main vibration mode of the engineering structure according to the seismic calculation results. The observation direction of the seismic acceleration signal is consistent with the main axis direction of the measured structure, and the Z direction remains vertical.

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