Seismic data monitoring method and system for liquefied natural gas receiving station

Abstract

The invention discloses a seismic data monitoring method and system for a liquefied natural gas receiving station. Strong vibration accelerometers are installed at a plurality of monitored positions in the liquefied natural gas receiving station; the strong vibration accelerometer is connected with an earthquake acquisition recorder; the strong vibration accelerometer sends a seismic data return instruction to the seismic acquisition recorder, and the seismic acquisition recorder real-time seismic data and sends the seismic data to the seismic monitoring data processing center according to a preset return instruction; and the earthquake monitoring data processing center determines that the real-time earthquake data of the preset receiving duration is received, analyzes the real-time earthquake data to obtain a monitoring result, judges whether the excitation state of the earthquake and a preset earthquake data monitoring index meet the shutoff requirement of the liquefied natural gas receiving station or not, and displays the monitoring result to a user through a preset prompt signal. The system is high in intelligent degree, can be accessed to the State Earthquake Bureau, integrates the functions of automatic monitoring, rapid early warning and facility emergency response, and provides rapid and accurate shutdown data for emergency shutdown of a receiving station.

Description

Technical Field

[0001] This invention belongs to the field of safety monitoring technology for liquefied natural gas receiving stations, and in particular relates to a method and system for monitoring seismic data at liquefied natural gas receiving stations. Background Technology

[0002] In the field of seismic data monitoring at liquefied natural gas receiving terminals, traditional monitoring methods often rely on manual judgment, lack free field, and cannot be connected to the China Earthquake Administration. These methods are not only inefficient but also highly susceptible to subjective factors, making it difficult to meet the needs for real-time, comprehensive, and accurate data acquisition and unable to provide rapid and accurate shutdown data for emergency shutdown of receiving terminals.

[0003] In existing technologies, some high-rise building seismic damage alarm systems can calculate the seismic damage response of high-rise building structures in real time and issue early warnings, but they are mainly designed for high-rise building structures and do not adequately consider the monitoring needs of the specific scenario of liquefied natural gas receiving stations.

[0004] Some earthquake electrostatic early warning systems, while capable of real-time earthquake detection with high accuracy, primarily rely on electrostatic field data and may lack specificity for monitoring earthquake data in the complex environment of liquefied natural gas receiving terminals. Furthermore, they do not address how to apply these warnings to the emergency response of specific facilities.

[0005] Based on the above situation, existing technologies still have certain limitations in seismic data monitoring at liquefied natural gas receiving stations, especially in the integrated application of automatic monitoring, rapid early warning, and facility emergency response, which needs further improvement. Summary of the Invention

[0006] The problem to be solved by the present invention is to provide a method and system for monitoring seismic data at liquefied natural gas receiving stations. This method solves the problem of the lack of integration of existing seismic data monitoring methods in terms of automatic monitoring, rapid early warning and facility emergency response.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for monitoring seismic data at a liquefied natural gas receiving station, comprising the following steps: S1: Install strong vibration accelerometers at multiple locations within the liquefied natural gas receiving station that require monitoring; S2: Connect the strong motion accelerometer to the seismic acquisition recorder; S3: The strong motion accelerometer sends a seismic data feedback instruction to the seismic acquisition recorder, and the seismic recorder sends the real-time seismic data to the seismic monitoring data processing center according to the preset transmission instruction. S4: After the earthquake monitoring data processing center determines that it has received real-time earthquake data for a preset reception duration, it analyzes the received real-time earthquake data to obtain monitoring results, determines whether the earthquake excitation state and the preset earthquake data monitoring indicators meet the shutdown requirements of the liquefied natural gas receiving station, and displays the monitoring results to the user through preset prompt signals.

[0008] Furthermore, in S4, if the monitoring results of the earthquake monitoring data processing center show that the earthquake's excitation state reaches the shutdown requirements of the liquefied natural gas receiving station, the earthquake monitoring data processing center sends an earthquake alarm and shutdown signal to the SIS system through the DO module, and the SIS system issues a shutdown command to the liquefied natural gas receiving station according to a predetermined logic.

[0009] Furthermore, in step S4, if the monitoring results from the earthquake monitoring data processing center show that the earthquake's excitation state has not met the shut-off requirements of the liquefied natural gas receiving station, the earthquake monitoring data processing center provides an earthquake alarm signal to the user's DCS system through the communication module.

[0010] Furthermore, in S1, the strong vibration accelerometer is installed at multiple locations on each liquefied natural gas storage tank of the liquefied natural gas receiving station, and the strong vibration accelerometer has an accuracy of not less than 16 bits.

[0011] Furthermore, in S2, the strong motion accelerometer and the seismic acquisition recorder are wirelessly connected and / or wired connected.

[0012] Furthermore, in step S3, the data processing center performs zero-mean processing and wavelet analysis on the received real-time seismic data. The zero-mean processing is used to eliminate the DC component in the real-time seismic data, so that the real-time seismic data can more accurately reflect the vibration characteristics of the earthquake. If the zero-mean processing result meets the preset standard deviation requirement, it indicates that the earthquake has not occurred; otherwise, it indicates that the earthquake may have occurred. The wavelet analysis is used to extract feature scores from the real-time earthquake data. When the feature score reaches a preset wavelet analysis feature score threshold, the feature score indicates that an earthquake has occurred; otherwise, it indicates that an earthquake may not have occurred.

[0013] Furthermore, the present invention also provides a seismic data monitoring system for a liquefied natural gas receiving station, and a method for operating the above-mentioned seismic data monitoring of a liquefied natural gas receiving station, comprising: Strong-motion accelerometers are used to capture vibration data within liquefied natural gas receiving stations and transmit the vibration data to seismic acquisition recorders. Seismic data acquisition and recording equipment is used to store and record vibration data transmitted from strong ground motion accelerometers. The earthquake monitoring data processing center is used to read and analyze vibration data from earthquake acquisition recorders to obtain monitoring results, determine the excitation state of earthquakes, and determine whether the preset earthquake data monitoring indicators meet the shutdown requirements of liquefied natural gas receiving stations. The programmable logic controller (PLC) is used to issue shutdown commands such as production stoppage and shutdown to the liquefied natural gas (LNG) receiving station when the earthquake monitoring data processing center determines that the earthquake's excitation state has reached the shutdown requirements of the LNG receiving station.

[0014] Furthermore, it also includes a communication module for sending the monitoring results obtained by the earthquake monitoring data processing center to the remote control center.

[0015] Furthermore, the present invention provides an apparatus including a memory, a processor, and an algorithm stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the data processing method as described above.

[0016] Furthermore, the present invention provides a computer-readable storage medium storing a computer algorithm, which, when executed by a processor, performs the aforementioned data processing.

[0017] The advantages and positive effects of this invention are: This invention is applicable to the field of safety monitoring technology for liquefied natural gas receiving stations. It is highly specialized and intelligent, and can be connected to the China Earthquake Administration. It integrates functions such as automatic monitoring, rapid early warning, and facility emergency response, and can acquire data in real time, comprehensively, and accurately, providing rapid and accurate shutdown data for emergency shutdown of receiving stations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall process of an embodiment of the method of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the system of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of an embodiment of the computer-readable storage medium of the present invention.

[0021] In the picture: 201. Strong Motion Accelerometer; 202. Seismic Acquisition Recorder; 203. Seismic Monitoring Data Processing Center; 204. Programmable Logic Controller; 205. Communication Module; 301. Processor; 302. Computer-readable storage medium. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The embodiments of the present invention will be further described below with reference to the accompanying drawings: like Figure 1 As shown, a method for monitoring seismic data at a liquefied natural gas receiving station includes the following steps.

[0024] S1: Install at least one strong vibration accelerometer at multiple locations within the liquefied natural gas receiving station that need to be monitored.

[0025] Specifically, one to three strong-motion accelerometers can be installed at multiple key locations within the liquefied natural gas (LNG) receiving terminal, such as on each LNG storage tank. These strong-motion accelerometers must have an accuracy of at least 16 bits. Multi-sensor fusion technology integrates data from multiple sensors, improving the accuracy and reliability of monitoring. Sensors at different locations can capture vibration information of different directions and intensities, avoiding inaccurate data due to single sensor failure or local interference. This allows for the precise capture of minute vibration signals, providing accurate foundational data for subsequent seismic data analysis. In this embodiment, sensors are installed at different parts of the LNG storage tank, including key locations such as the top, bottom, and middle. This allows for more accurate monitoring of the tank's vibration in different directions, a more comprehensive understanding of the impact of earthquakes on the LNG storage tank, and the timely detection of potential safety hazards.

[0026] Seismic sensors can also be deployed in key areas of the liquefied natural gas (LNG) receiving terminal, such as tank foundations, pipeline supports, and pump rooms. Preferably, various types of seismic sensors, including acceleration sensors, velocity sensors, and displacement sensors, can be strategically arranged. These sensors can accurately capture seismic vibration information from different angles, ensuring comprehensive monitoring of the vibration of the entire LNG receiving terminal.

[0027] Accelerometers measure changes in acceleration caused by earthquakes, responding quickly to the initial tremors and playing a crucial role in detecting earthquake intensity and frequency. Velocity sensors measure the speed of seismic wave propagation, aiding in the analysis of wave type and propagation direction. Displacement sensors monitor ground and structural displacement caused by earthquakes, essential for assessing the degree of deformation of receiving station equipment and structures.

[0028] S2: Connect the strong-motion accelerometer to the seismic data acquisition recorder. Specifically, establish a network connection via wireless transmission to establish communication between the strong-motion accelerometer and the seismic data acquisition recorder. A wired connection is also supported as a backup. The wireless transmission utilizes advanced wireless communication technologies such as LoRa (LoLow Power Wide Area Network) or ZigBee, offering advantages such as long transmission distance, low power consumption, and strong anti-interference capabilities, making it suitable for the complex environment of liquefied natural gas receiving stations. The wired connection uses highly reliable cables, such as fiber optic cables or shielded twisted-pair cables, ensuring stable seismic data transmission even when the wireless signal is interfered with or interrupted. The seismic data acquisition recorder has multi-channel data reception capabilities, enabling it to simultaneously receive seismic data from multiple strong-motion accelerometers.

[0029] S3: The strong motion accelerometer sends a seismic data feedback command to the seismic acquisition recorder, which then sends the real-time seismic data to the seismic monitoring data processing center according to the preset transmission command.

[0030] Specifically, the strong-motion accelerometer captures vibration data within the liquefied natural gas receiving station in real time and sends seismic data transmission commands to the seismic data acquisition recorder according to preset time intervals or trigger conditions. The seismic data acquisition recorder has multiple built-in memories and adopts a redundant storage design to ensure the safe and reliable storage of seismic data. Upon receiving the transmission command from the strong-motion accelerometer, the seismic data acquisition recorder sends the real-time seismic data to the seismic monitoring data processing center according to preset transmission instructions. These preset transmission instructions can be flexibly set according to actual needs, such as setting different transmission priorities, prioritizing the transmission of important seismic data to ensure that critical information reaches the data processing center in a timely manner.

[0031] S4: After the earthquake monitoring data processing center confirms that it has received real-time earthquake data for a preset reception duration, it analyzes the received real-time earthquake data to obtain monitoring results, determines whether the earthquake excitation state and the preset earthquake data monitoring indicators meet the shutdown requirements of the liquefied natural gas receiving station, and displays the monitoring results to the user through preset prompt signals.

[0032] If the monitoring results from the earthquake monitoring data processing center show that the earthquake's excitation state meets the shutdown requirements of the liquefied natural gas receiving station, the earthquake monitoring data processing center will send an earthquake alarm and shutdown signal to the SIS system through the D0 module. The SIS system will then issue a shutdown command to the liquefied natural gas receiving station according to the predetermined logic.

[0033] If the monitoring results from the earthquake monitoring data processing center show that the earthquake's excitation state has not met the shutdown requirements of the liquefied natural gas receiving station, the earthquake monitoring data processing center will provide an earthquake alarm signal to the user's DCS system through the communication module.

[0034] Specifically, after the earthquake monitoring data processing center confirms receipt of real-time earthquake data for a preset reception duration, it initiates a data analysis program to comprehensively analyze the received real-time earthquake data. Specifically, the analysis process employs various advanced signal processing algorithms and data analysis models, such as Fourier transform, wavelet analysis, and artificial neural networks. Through spectral analysis and time-frequency analysis of the earthquake data, characteristic parameters of the earthquake, such as magnitude, epicentral distance, and seismic wave type, are extracted. Simultaneously, combined with the geographical information, structural characteristics, and equipment parameters of the liquefied natural gas (LNG) receiving station, the system determines the earthquake's excitation state and whether the preset earthquake data monitoring indicators meet the LNG receiving station's shutdown requirements. The preset earthquake data monitoring indicators include earthquake acceleration thresholds, vibration frequency ranges, and vibration durations. It should be noted that these indicators were determined through extensive experimental and simulation analyses based on the design standards and safety specifications of the LNG receiving station.

[0035] If monitoring results indicate that the earthquake's intensity reaches the shutdown requirements of the liquefied natural gas (LNG) receiving terminal, the earthquake monitoring data processing center sends an earthquake alarm signal to the programmable logic controller (PLC) via the first communication module. The PLC then issues shutdown commands such as production stoppage and shutdown to the LNG receiving terminal, taking timely measures to ensure the terminal's safety. This function can quickly stop the terminal's operation during an earthquake, preventing equipment damage, leaks, and other accidents caused by the earthquake. For example, when the earthquake intensity reaches a certain level, it may damage the terminal's storage tanks, pipelines, and other facilities; issuing shutdown commands in a timely manner can reduce losses. If monitoring results indicate that the earthquake's intensity does not reach the shutdown requirements of the LNG receiving terminal, the data processing center provides a non-earthquake alarm signal to the user via the second communication module, allowing the user to be informed of the earthquake situation in a timely manner without needing to take emergency shutdown measures.

[0036] The data processing center performs zero-mean processing and wavelet analysis on the received real-time seismic data. Zero-mean processing eliminates the DC component in the real-time seismic data, making it more accurately reflect the vibration characteristics of earthquakes. If the zero-mean processing result meets the preset standard deviation requirement, it indicates that an earthquake has not occurred; otherwise, it indicates that an earthquake may have occurred. Wavelet analysis extracts feature scores from the real-time seismic data. When the feature score reaches a preset wavelet analysis feature score threshold, it indicates that an earthquake has occurred; otherwise, it indicates that an earthquake may not have occurred. Combining the results of these two analysis methods can accurately confirm whether an earthquake has occurred, improving the accuracy of the judgment. For example, in some complex seismic situations, a single analysis method may lead to misjudgment, while combining the two methods can corroborate each other, reducing the possibility of misjudgment.

[0037] The present invention will now be described in detail with reference to specific embodiments: The specific implementation method of the seismic data monitoring method for the liquefied natural gas receiving station includes the following steps: S1: The strong motion accelerometer sends a seismic data feedback command to the seismic acquisition recorder, which then sends the real-time seismic data to the seismic monitoring data processing center according to the preset transmission command.

[0038] S2: After the earthquake monitoring data processing center confirms that it has received real-time earthquake data for a preset reception time, it performs zero-mean processing on the received real-time earthquake data. If the result meets the preset standard deviation requirement, it indicates that an earthquake has not occurred; otherwise, it indicates that an earthquake may have occurred.

[0039] S3: The earthquake monitoring data processing center performs wavelet analysis on real-time earthquake data to obtain feature scores.

[0040] S4: The earthquake monitoring data processing center determines whether the preset wavelet analysis feature score threshold has been reached. If the preset wavelet analysis feature score threshold has been reached, it indicates that an earthquake has occurred; otherwise, it indicates that an earthquake has not occurred.

[0041] S5: The earthquake monitoring data processing center integrates the judgment results of S2 and S4 to confirm whether an earthquake has occurred. If it has, the monitoring results are displayed to the user through preset prompt signals.

[0042] like Figure 2 As shown, the present invention also provides an earthquake data monitoring system for a liquefied natural gas receiving station, including a strong motion accelerometer 201, an earthquake acquisition recorder 202, an earthquake monitoring data processing center 203, a programmable logic controller 204, and a communication module 205.

[0043] The strong vibration accelerometer 201 is used to capture vibration data within the liquefied natural gas receiving station and transmit the vibration data to the seismic acquisition recorder 202.

[0044] The seismic accelerometer 202 uses a capacitive measurement principle, where the change in capacitance is proportional to the applied acceleration. Capacitive sensors offer advantages such as high sensitivity, good stability, and a wide dynamic range, enabling accurate measurement of acceleration changes caused by earthquakes. Simultaneously, the sensor incorporates electronic signal conditioning, amplifying and filtering the acquired signal to improve signal quality and anti-interference capabilities. The seismic acquisition recorder 202 has multiple built-in memories for storing and recording vibration data transmitted from the strong-motion accelerometer 201.

[0045] The seismic data acquisition and recording device 202 has multiple built-in memories, using high-capacity, high-speed solid-state drives (SSDs) as storage media to ensure the storage of large amounts of seismic data. It features multi-channel data acquisition and recording capabilities, simultaneously receiving vibration data from multiple strong-motion accelerometers and recording it in real-time at preset time intervals. The seismic data acquisition and recording device 202 incorporates a precise timer, employing a high-precision atomic clock or GPS timing technology to record the time of vibration occurrence, ensuring the time accuracy of the seismic data reaches the millisecond level or even higher. Furthermore, the seismic data acquisition and recording device 202 also has data preprocessing functions, capable of performing preliminary filtering and noise reduction on the acquired seismic data to improve data quality.

[0046] The earthquake monitoring data processing center 203 is used to read and analyze vibration data from the earthquake acquisition recorder 202 to obtain monitoring results, determine the excitation state of the earthquake, and determine whether the preset earthquake data monitoring indicators meet the shut-off requirements of the liquefied natural gas receiving station.

[0047] The seismic monitoring data processing center 203 is the brain of the entire liquefied natural gas receiving terminal's seismic data monitoring system. It reads and analyzes vibration data from the seismic acquisition recorder 202 to obtain monitoring results. Employing a high-performance server cluster, it possesses powerful computing and data processing capabilities. The seismic monitoring data processing center 203 is equipped with professional seismic data analysis software that integrates various advanced signal processing algorithms and data analysis models, enabling rapid and accurate analysis of seismic data. Furthermore, the seismic monitoring data processing center 203 also has data management and storage functions, allowing for long-term storage of analysis results and historical seismic data for subsequent retrieval and analysis.

[0048] The programmable logic controller (PLC) 204 is used to issue shutdown commands, such as production stoppage or shutdown, to the liquefied natural gas (LNG) receiving station when the earthquake monitoring data processing center 203 determines that the earthquake's excitation state has reached the shutdown requirements. This enables the emergency shutdown of the receiving station and ensures its safety. For example, when the earthquake intensity reaches a certain level and may cause serious damage to the receiving station's facilities, the PLC 204 can respond quickly and issue shutdown commands to prevent accidents.

[0049] The communication module 205 is used to send the monitoring results obtained by the earthquake monitoring data processing center 203 to the remote control center.

[0050] Specifically, various communication methods can be employed, such as Ethernet, 4G / 5G wireless communication, and satellite communication, to ensure reliable data transmission in different network environments. The communication module 205 features data encryption and security authentication functions to prevent data theft or tampering during transmission, ensuring the security of seismic data. Simultaneously, the communication module 205 supports remote configuration and management, allowing users to easily set and adjust communication parameters. It is used to send monitoring results to a remote control center, enabling data sharing and remote monitoring. Furthermore, it supports signal transmission between the seismic monitoring data processing center 203, the programmable logic controller 204, and users, ensuring timely delivery of warnings and shutdown commands. For example, through the communication module 205, managers can monitor the seismic situation at the receiving station in real time at the remote control center and make timely decisions.

[0051] Preferably, the data monitored by this invention is compared and supplemented with the data released by the China Earthquake Administration to obtain more comprehensive and accurate earthquake information. At the same time, the monitoring results are sent to the remote control center through the communication module 205 to realize data sharing and remote monitoring. For example, when a large earthquake occurs, the data from the China Earthquake Administration can provide more macroscopic earthquake information. Combined with the receiving station's own monitoring data, it helps to more accurately assess the impact of the earthquake on the receiving station.

[0052] During operation, the strong-motion accelerometer 201 captures vibration data in real time and sends it to the seismic acquisition recorder 202. The seismic acquisition recorder 202 stores the data and sends it to the seismic monitoring data processing center 203. The seismic monitoring data processing center 203 analyzes and judges the data, and sends corresponding signals to the programmable logic controller 204 or the user through the communication module 205 based on the judgment results. The programmable logic controller 204 issues a shutdown command to the liquefied natural gas receiving station based on the received signals. Simultaneously, the system accesses data from the China Earthquake Administration, compares and supplements it with its own monitoring data, and sends the monitoring results to the remote control center through the communication module 205, realizing data sharing and remote monitoring. For example, the system can periodically synchronize data with the China Earthquake Administration to obtain the latest earthquake information and improve monitoring accuracy. During operation, the system needs regular maintenance and inspection to ensure the normal operation of each module. For example, checking the accuracy and sensitivity of the strong-motion accelerometer, clearing the memory of the seismic acquisition recorder, and updating the algorithm of the seismic monitoring data processing center are necessary to ensure the system's performance and reliability.

[0053] In this embodiment, a computer-readable storage medium, such as... Figure 3As shown, the device includes a processor 301, a computer-readable storage medium 302, and a computer program stored in the computer-readable storage medium and executable on the processor. When the processor 301 executes the computer program, it implements the seismic data monitoring method for a liquefied natural gas receiving station as described in the above embodiments.

[0054] For system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to in the description of the method embodiments. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually.

[0055] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products.

[0056] Therefore, embodiments of the present invention may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0057] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, systems, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0058] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 A computer program that specifies a function in a computer-readable storage medium or a block.

[0059] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0060] The advantages and positive effects of this invention are: This invention is applicable to the field of safety monitoring technology for liquefied natural gas receiving stations. It is highly specialized and intelligent, and can be connected to the China Earthquake Administration. It integrates functions such as automatic monitoring, rapid early warning, and facility emergency response, and can acquire data in real time, comprehensively, and accurately, providing rapid and accurate shutdown data for emergency shutdown of receiving stations.

[0061] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A method for monitoring seismic data at a liquefied natural gas receiving station, characterized in that: Includes the following steps, S1: Install strong vibration accelerometers at multiple locations within the liquefied natural gas receiving station that require monitoring; S2: Connect the strong motion accelerometer to the seismic acquisition recorder; S3: The strong motion accelerometer sends a seismic data feedback instruction to the seismic acquisition recorder, and the seismic recorder sends the real-time seismic data to the seismic monitoring data processing center according to the preset transmission instruction. S4: After the earthquake monitoring data processing center determines that it has received real-time earthquake data for a preset reception duration, it analyzes the received real-time earthquake data to obtain monitoring results, determines whether the earthquake excitation state and the preset earthquake data monitoring indicators meet the shutdown requirements of the liquefied natural gas receiving station, and displays the monitoring results to the user through preset prompt signals.

2. The seismic data monitoring method for a liquefied natural gas receiving station according to claim 1, characterized in that: In step S4, if the monitoring results of the earthquake monitoring data processing center show that the earthquake's excitation state has reached the shutdown requirements of the liquefied natural gas receiving station, the earthquake monitoring data processing center sends an earthquake alarm and shutdown signal to the SIS system through the D0 module, and the SIS system issues a shutdown command to the liquefied natural gas receiving station according to the predetermined logic.

3. The seismic data monitoring method for a liquefied natural gas receiving station according to claim 1, characterized in that: In step S4, if the monitoring results from the earthquake monitoring data processing center show that the earthquake's excitation state has not met the shut-off requirements of the liquefied natural gas receiving station, the earthquake monitoring data processing center will provide an earthquake alarm signal to the user's DCS system through the communication module.

4. A seismic data monitoring method for a liquefied natural gas receiving station according to any one of claims 1 to 3, characterized in that: In S1, the strong vibration accelerometer is installed at multiple locations on each liquefied natural gas storage tank of the liquefied natural gas receiving station, and the strong vibration accelerometer has an accuracy of not less than 16 bits.

5. A seismic data monitoring method for a liquefied natural gas receiving station according to any one of claims 1 to 3, characterized in that: In S2, the strong motion accelerometer and the seismic acquisition recorder are wirelessly connected and / or wired connected.

6. A method for monitoring seismic data at a liquefied natural gas receiving station according to any one of claims 1 to 3, characterized in that: In step S3, the data processing center performs zero-mean processing and wavelet analysis on the received real-time seismic data. The zero-mean processing is used to eliminate the DC component in the real-time seismic data, so that the real-time seismic data can more accurately reflect the vibration characteristics of the earthquake. If the zero-mean processing result meets the preset standard deviation requirement, it indicates that the earthquake has not occurred; otherwise, it indicates that the earthquake may have occurred. The wavelet analysis is used to extract feature scores from the real-time earthquake data. When the feature score reaches a preset wavelet analysis feature score threshold, the feature score indicates that an earthquake has occurred; otherwise, it indicates that an earthquake may not have occurred.

7. A seismic data monitoring system for a liquefied natural gas receiving station, characterized in that: The seismic data monitoring method for a liquefied natural gas receiving station according to any one of claims 1 to 6 includes, Strong-motion accelerometers are used to capture vibration data within liquefied natural gas receiving stations and transmit the vibration data to seismic acquisition recorders. Seismic data acquisition and recording equipment is used to store and record vibration data transmitted from strong ground motion accelerometers. The earthquake monitoring data processing center is used to read and analyze vibration data from earthquake acquisition recorders to obtain monitoring results, determine the excitation state of earthquakes, and determine whether the preset earthquake data monitoring indicators meet the shutdown requirements of liquefied natural gas receiving stations. The programmable logic controller (PLC) is used to issue shutdown commands such as production stoppage and shutdown to the liquefied natural gas (LNG) receiving station when the earthquake monitoring data processing center determines that the earthquake's excitation state has reached the shutdown requirements of the LNG receiving station.

8. The seismic data monitoring system for a liquefied natural gas receiving station according to claim 7, characterized in that: It also includes a communication module for sending the monitoring results obtained by the earthquake monitoring data processing center to the remote control center.

9. A computer device comprising a memory, a processor, and an algorithm stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, it implements the data processing method as described in any one of claims 1 to 6.

10. A computer-readable storage medium storing a computer algorithm, characterized in that, When the computer algorithm is executed by the processor, it performs the data processing as described in any one of claims 1 to 6.

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