Earthquake intensity data on-demand recovery method, optical terminal intensity meter and system

Abstract

The application discloses a kind of seismic intensity data on-demand recovery method, optical terminal intensity instrument and system, wherein, seismic intensity data on-demand recovery method is applied to optical terminal intensity instrument;Each optical terminal intensity instrument and the flow server of data processing center are communicated by three kinds of data transmission modes, simultaneously, flow server can be by sending application time period data packet to optical terminal intensity instrument, waveform data in specific time period is flexibly obtained, to reach the purpose of on-demand data recovery;Especially when earthquake event occurs, the waveform data of optical terminal intensity instrument in specific time period within a certain range around epicenter can be automatically recovered according to epicenter position, response efficiency is high, and key event and regional data can be focused quickly.The technical scheme provided by the application efficiently completes the deployment of seismic monitoring equipment, significantly reduces bandwidth and storage cost, and provides flexible data acquisition mode for emergency response, scientific research and engineering application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent processing of seismic data, and particularly relates to a method for on-demand recovery of seismic intensity data, an optical terminal intensity meter and a system. BACKGROUND

[0002] Traditional seismic recording and measurement methods require that monitoring terminal devices such as seismographs and intensity meters be erected at specific station locations, and require complex installation and debugging processes, and the devices need to be maintained by dedicated personnel, which is very costly, greatly limiting the number of installations and the widespread deployment of seismic monitoring networks.

[0003] In addition, existing seismic monitoring terminal devices are complex to access a seismic network, not only in terms of data volume, but also in terms of the need for dedicated equipment and a dedicated network, with high production, construction and operation and maintenance costs; and when an earthquake event occurs, the sparse density of the monitoring terminal also affects the reporting speed and efficiency of the seismic intensity data. SUMMARY

[0004] To overcome the shortcomings of the prior art, the present application provides a method for on-demand recovery of seismic intensity data, an optical terminal intensity meter and a system.

[0005] A method for on-demand recovery of seismic intensity data, which is applied to an optical terminal intensity meter, the optical terminal intensity meter being a universal seismic intensity meter based on a fiber modem; the optical terminal intensity meter includes three data transmission modes: continuous waveform transmission mode, triggered waveform transmission mode and triggered parameter transmission mode; the method for on-demand recovery of seismic intensity data comprises:

[0006] After the optical terminal intensity meter is started, it is initialized to any one of the three data transmission modes; or the optical terminal intensity meter receives a control command package from a preset streaming server, which is used to set the optical terminal intensity meter to any one of the three data transmission modes;

[0007] In the continuous waveform transmission mode, the optical terminal intensity meter continuously and uninterruptedly sends real-time waveform data to the streaming server;

[0008] In the triggered waveform transmission mode, the optical terminal intensity meter performs waveform trigger detection; in the absence of waveform triggering, it sends a status information package to the streaming server every first preset time; when there is a predetermined event waveform trigger, it first sends a trigger parameter package to the streaming server, then sends a waveform data package within a second preset time before the predetermined event waveform trigger, and then continuously sends the trigger parameter package and the waveform data package until the predetermined event waveform trigger ends; at the same time, before and after the predetermined event waveform trigger, it maintains sending a status information package to the streaming server every first preset time;

[0009] In the post-trigger transmission parameter mode, the optical terminal intensity meter performs waveform triggering detection; in the case of no waveform triggering, the optical terminal intensity meter sends a state information packet to the stream server every third preset time interval; in the case of predetermined event waveform triggering, the optical terminal intensity meter sends a trigger parameter packet to the stream server at a fourth preset time interval until the predetermined event waveform triggering ends; meanwhile, the optical terminal intensity meter keeps sending a state information packet to the stream server every first preset time interval before and after the predetermined event waveform triggering;

[0010] When the optical terminal intensity meter receives the application time period data packet from the stream server, if the optical terminal intensity meter is in the continuous transmission waveform mode or if the optical terminal intensity meter is in the post-trigger transmission waveform mode and in the case of no waveform triggering, or if the optical terminal intensity meter is in the post-trigger transmission parameter mode and in the case of no waveform triggering, the optical terminal intensity meter actively sends time period waveform data corresponding to the application time period data packet to the stream server.

[0011] If the optical terminal intensity meter is in the case of predetermined event waveform triggering, the optical terminal intensity meter sends the time period waveform data corresponding to the application time period data packet to the stream server after the predetermined event waveform triggering ends.

[0012] An optical terminal intensity meter for performing the above-described seismic intensity data on-demand recovery method.

[0013] A seismic intensity data on-demand recovery system including a stream server and a plurality of optical terminal intensity meters as described above in communication with the stream server.

[0014] The seismic intensity data on-demand recovery method, the optical terminal intensity meter and the system provided by the present application can arrange a large number of optical terminal intensity meters based on optical fiber modems to form a dense seismic data monitoring station distribution network; meanwhile, in the three data transmission modes of the optical terminal intensity meter, the data processing center can send a data application command to the optical terminal intensity meter according to needs, such as waveform data of a specific time period, and the optical terminal intensity meter sends the waveform data of the time period required by the processing software to the stream server from the storage component after receiving the application time period data packet from the stream server, so as to achieve the purpose of flexibly and actively collecting seismic intensity data on demand, especially when a seismic event occurs, to automatically recover the waveform data of the optical terminal intensity meters within a specific time period in a certain range around the epicenter according to the epicenter position, to improve the seismic data processing speed, to efficiently and intelligently extract effective seismic information, and to form a high-efficiency and intelligent seismic data processing system.

[0015] Compared with the prior art, the technical solution provided by the present application has the following beneficial effects:

[0016] 1) High efficiency to complete the deployment of seismic monitoring equipment, significantly reduce bandwidth and storage costs. The software and hardware of the optical terminal intensity instrument are based on the optical fiber modem, which combines the functions of the optical network terminal and the seismic intensity instrument, and is convenient for large-scale deployment.

[0017] 2) Improve response efficiency, quickly focus on key events and regional data. The data processing center communicates with each optical terminal intensity instrument through a streaming server, including three data transmission modes, covering real-time data transmission, specific time data transmission and triggered event working mode, achieving on-demand data recovery.

[0018] 3) Can meet the needs of diversification, provide flexible data acquisition methods for emergency response, scientific research and engineering application. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the working flow chart of the continuous transmission waveform mode in the embodiment of the present application;

[0020] Figure 2 is the working flow chart of the triggered transmission waveform mode in the embodiment of the present application;

[0021] Figure 3 is the working flow chart of the triggered transmission parameter mode in the embodiment of the present application;

[0022] Figure 4 is the hardware framework diagram of the optical terminal intensity instrument in the embodiment of the present application;

[0023] Figure 5 is the function framework diagram of the optical terminal intensity instrument in the embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear and clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0025] A seismic intensity data on-demand recovery method is provided, which is applied to the optical terminal intensity instrument. The optical terminal intensity instrument is a ubiquitous seismic intensity instrument based on an optical fiber modem, which has the characteristics of low deployment cost and wide deployment range, and has ubiquitous sensing ability and can collect seismic intensity data. Each optical terminal intensity instrument communicates with the server of the data processing center, such as the streaming server.

[0026] The optical terminal intensity instrument includes three data transmission modes: continuous transmission waveform mode, transmission waveform mode after triggering, and transmission parameter mode after triggering. Specifically, the optical terminal intensity instrument can be initialized to any one of the three data transmission modes after the device is started; or it can be specified by the streaming server, for example, the streaming server sends a control command package to the optical terminal intensity instrument, and the optical terminal intensity instrument is set to any one of the three data transmission modes after analyzing the control command package.

[0027] The streaming server sends an application time period data package to the optical terminal intensity instrument to obtain seismic intensity data within a specific time, for example, waveform data collected by each terminal within a certain range of the epicenter before and after an earthquake. Regardless of the transmission mode of the optical terminal intensity instrument, the streaming server can send an application time period data package to it. The optical terminal intensity instrument should return a control command response package to the streaming server according to its data collection state, and then transmit the time period waveform data package required by the streaming server to the streaming server. If the optical terminal intensity instrument is in the triggered data sending state when the application time period waveform data is sent, the triggered data is sent first, and the time period waveform data is sent after the triggered data sending is completed.

[0028] The working process of the continuous transmission waveform mode is shown in Figure 1 After the device is started, if the initial transmission mode is continuous waveform data transmission, or the device is set to continuous waveform data transmission after receiving the transmission mode control package sent by the streaming server, the optical terminal intensity instrument starts to continuously send real-time waveform data packages to the streaming server. The streaming server starts to receive real-time waveform data, and does not respond to the real-time waveform data package.

[0029] The specific process is as follows:

[0030] a) The streaming server actively sends a control command package to the optical terminal intensity instrument to set the transmission mode to continuous transmission waveform mode;

[0031] b) The optical terminal intensity instrument analyzes the control package and returns a control command response package to the streaming server;

[0032] c) If the control command package is a transmission mode control package, the transmission model value is judged;

[0033] d) If the transmission model value is 1, it indicates that the transmission mode is changed to continuous transmission waveform mode; if the transmission model value is 0, 2, or 3, it indicates that the transmission mode is not changed or is changed to other transmission modes;

[0034] e) If the continuous transmission waveform mode is set successfully, the optical terminal intensity instrument continuously sends real-time waveform data to the streaming server;

[0035] f) In the mode process, if the stream server sends the application time period data packet, the optical terminal intensity instrument should actively send the time period data to the stream server.

[0036] In the figure, "control command type" indicates the judgment of the transmission mode value of the transmission mode control packet; the "set continuous transmission mode" indicated by the dashed line indicates the transmission mode control packet or time period data application packet from the stream server to the optical terminal intensity instrument; the "control command response" indicated by the dashed line indicates the control response packet of the transmission mode control packet or time period data application packet returned from the optical terminal intensity instrument to the stream server; the "continuous transmission" indicated by the dashed line indicates the continuous transmission of real-time waveform data.

[0037] The working process of the triggered transmission waveform mode is shown in Figure 2 After the equipment is started, if the initial transmission mode is the triggered transmission waveform mode, or the transmission mode control packet sent by the stream server is received and the triggered transmission waveform mode is set, the waveform triggering detection is started, i.e., the waveform of a predetermined event (such as an earthquake) is detected. In the absence of triggering, a state information packet is sent to the stream server every 10 seconds (i.e., the first preset time). When the optical terminal intensity instrument detects event triggering, a first packet of triggering parameter packet is immediately transmitted to the stream server, followed by the transmission of the waveform data packet 30 seconds before triggering (i.e., the second preset time), and then the continuous transmission of the triggering parameter packet and the waveform data packet until the event triggering ends, and then the mode of sending the state information packet to the stream server every 10 seconds is continued. The state information packet is not interrupted in transmission before and after triggering, and is always transmitted every 10 seconds. Among them, the triggering parameter packet is the seismic related parameter data other than the waveform data.

[0038] The specific process is as follows:

[0039] a) The stream server actively sends a control command packet to the optical terminal intensity instrument to set the transmission mode to the triggered transmission waveform mode;

[0040] b) The optical terminal intensity instrument analyzes the control packet and returns a control command response packet to the stream server;

[0041] c) If it is analyzed as the triggered transmission waveform mode, the waveform triggering detection is started, and it is judged whether triggering occurs;

[0042] d) If no triggering occurs, a state information packet is sent to the stream server every 10 seconds;

[0043] e) If triggering occurs, the interval of 10 seconds in process d) is maintained for the transmission of the state information packet, and at the same time, a first packet of triggering parameter packet is immediately transmitted to the stream server, followed by the transmission of the waveform data packet 30 seconds before triggering, and then the continuous transmission of the triggering parameter packet and the waveform data packet until the event triggering ends, and then the process returns to process d) after the end.

[0044] f) In the mode process, if the stream server sends the application time period data packet, the triggering state should be determined first, if it is no triggering, the optical terminal intensity instrument should actively send the time period data to the stream server, if it is triggering, it should directly enter the flow e).

[0045] Wherein, the "set to the transmission waveform mode after triggering" shown by the dotted line represents the transmission mode control packet or the time period data application packet from the stream server to the optical terminal intensity instrument; the "control command response" shown by the dotted line represents the control response packet of the transmission mode control packet or the time period data application packet returned from the optical terminal intensity instrument to the stream server.

[0046] The working flow of the transmission parameter mode after triggering is as shown in Figure 3 After the device is started, if the initial transmission mode is the transmission parameter mode after triggering, or the transmission mode control packet sent by the stream server is set to the transmission parameter mode after triggering, the waveform triggering detection is started. In the case of no triggering, the state information packet is sent to the stream server once every 10 seconds (i.e. the third preset time). If the optical terminal intensity instrument detects event triggering, the triggering parameter packet is immediately sent to the stream server, and the sending frequency is one packet per second (i.e. the fourth preset time) until the event triggering ends. Then the mode of sending the state information packet to the stream server once every 10 seconds is continued. The state information packet is not interrupted before and after triggering, and is always transmitted once every 10 seconds.

[0047] The specific flow is as follows:

[0048] a) The stream server actively sends the control command packet to the optical terminal intensity instrument, and sets the transmission mode to the transmission parameter mode after triggering;

[0049] b) The optical terminal intensity instrument analyzes the control packet, and returns the control command response packet to the stream server;

[0050] c) If it is analyzed as the transmission parameter mode after triggering, the waveform triggering detection is started, and whether it is triggered is determined;

[0051] d) If it is not triggered, the state information packet is sent to the stream server once every 10 seconds;

[0052] e) If it is triggered, the interval of 10 seconds in the flow d) is maintained to transmit the state information packet once, and the triggering parameter packet is immediately sent to the stream server, and the sending frequency is one packet per second until the event triggering ends. After the end, it returns to the flow d); that is, compared with the transmission waveform mode after triggering, only the triggering parameter packet is sent, and no waveform data packet is sent.

[0053] In the mode process, if the stream server sends a time period data packet, the triggering state should be determined first. If there is no triggering, the optical terminal intensity instrument should actively send the time period data to the stream server. If there is triggering, the process e) should be directly entered.

[0054] The dashed line "set to trigger transmission parameter mode" represents a transmission mode control packet or a time period data application packet from the stream server to the optical terminal intensity instrument. The dashed line "control command response" represents a control response packet of the transmission mode control packet or the time period data application packet returned from the optical terminal intensity instrument to the stream server.

[0055] In the above-mentioned three data transmission mode working processes, the specific values of the first preset time, the second preset time, the third preset time and the fourth preset time can be flexibly set according to the actual application needs.

[0056] Further, the predetermined event waveform triggering mode includes a threshold triggering mode and a time period triggering mode. Specifically, the threshold triggering mode triggers only when the waveform meets the triggering threshold, and stops triggering after the waveform does not meet the triggering threshold. The time period triggering mode refers to that the optical terminal intensity instrument triggers in a specific time period. The stream server can send a triggering threshold setting control packet to the optical terminal intensity instrument to set the triggering threshold parameter, and send a time period triggering control packet to set the start and end time of triggering. After receiving the control packet, the optical terminal intensity instrument should send a control command response packet to the stream server.

[0057] An optical terminal intensity instrument is proposed for performing the above-mentioned seismic intensity data on-demand recovery method. As shown in Figure 4 The optical terminal intensity instrument includes:

[0058] An optical fiber modem, which includes an MCU and an optical communication module electrically connected to the MCU; the optical communication module is used for network access and data uploading;

[0059] A three-axis MEMS accelerometer, which is electrically connected to the MCU; the three-axis MEMS accelerometer is used for real-time acquisition of three-axis acceleration data;

[0060] A magnetometer, which is electrically connected to the MCU; the magnetometer is used for real-time acquisition of three-axis magnetic field data;

[0061] The optical fiber modem is used to provide a double data transmission channel including broadband communication and seismic intensity data.

[0062] The optical fiber modem is also called an optical terminal, which is the main equipment for current home and enterprise network access. The optical fiber modem includes an MCU, i.e., a master control chip, and an optical communication module electrically connected to the MCU, and the optical communication module is used for network access and data uploading.

[0063] MEMS, or Microelectromechanical Systems, involves electrically connecting a MEMS sensor module to the MCU of a fiber optic modem. The MEMS sensor module is used for real-time acquisition of seismic intensity data. The fiber optic modem provides dual data transmission channels, including broadband communication and seismic intensity data. Thus, the integration of the fiber optic modem and MEMS sensor enables automated and intelligent seismic intensity monitoring.

[0064] The optical communication module provides both earthquake early warning service data links and broadband service data links. The MCU in the fiber optic modem performs three main functions: data processing for the primary function, attitude correction control of the optical terminal intensity meter, and automatic registration of the optical terminal intensity meter as a terminal with the server. The MEMS sensor module is electrically connected to the MCU via I2C or SPI bus. The MEMS sensor module includes two triaxial accelerometers and one magnetometer, which are connected to the main control chip via I2C / SPI interfaces.

[0065] The working principle of an optical terminal intensity meter: Each optical terminal intensity meter has unique identification information. After powering on, it automatically registers with the server to determine its location and status information. During monitoring, such as... Figure 5 As shown, acceleration and magnetic field data in the directions of gravity and geomagnetic fields in the external environment are acquired in real time by the main control chip through the MEMS sensor module. After gravity acceleration analysis and geomagnetic field vector analysis, the attitude of the optical terminal intensity meter is calculated using a built-in algorithm. If the attitude deviation exceeds a preset value, the attitude correction module is triggered to automatically adjust the device attitude to ensure measurement accuracy. After the corrected data is processed by the main control chip, it is quickly uploaded to the seismic network center via the optical communication module using a fiber optic network, realizing real-time monitoring and transmission of seismic intensity data.

[0066] The entire optical terminal intensity meter is based on a fiber optic modem and integrates a MEMS sensor module, a main control chip, an optical communication module, and automatic registration and attitude correction functions, forming a complete earthquake intensity monitoring system. It significantly simplifies the installation and maintenance process of earthquake monitoring equipment, reduces construction costs, improves data transmission efficiency and measurement accuracy, and provides an efficient, economical, and reliable solution for earthquake early warning and rapid intensity reporting.

[0067] A system for on-demand seismic intensity data retrieval is proposed, comprising a streaming server and multiple optical terminal intensity meters communicating with the streaming server. The working principles of the streaming server and optical terminal intensity meters in this system have been described above and will not be repeated here to avoid repetition.

[0068] The above is the elaboration of the present application, for helping to understand the present application; but the embodiments of the present application are not limited by the above examples, any change, modification, replacement, combination, simplification made without departing from the principles of the present application, should be equivalent to the replacement mode, all are included in the protection scope of the present application.

Claims

1. A method for on-demand retrieval of earthquake intensity data, characterized in that, The method for on-demand seismic intensity data retrieval is applied to an optical terminal intensity meter, which is a ubiquitous seismic intensity meter based on a fiber optic modem; the optical terminal intensity meter includes three data transmission modes: continuous waveform transmission mode, waveform transmission mode after triggering, and parameter transmission mode after triggering. The method for on-demand retrieval of earthquake intensity data includes: After startup, the optical terminal intensity meter is initialized to any one of the three data transmission modes; or, the optical terminal intensity meter receives a control command packet from a preset streaming server, the control command packet being used to set the optical terminal intensity meter to any one of the three data transmission modes. In the continuous transmission waveform mode, the optical terminal intensity meter continuously and uninterruptedly sends real-time waveform data to the streaming server; In the triggered waveform transmission mode, the optical terminal intensity meter performs waveform trigger detection; in the absence of waveform trigger, it sends a status information packet to the streaming server every first preset time interval; when a predetermined event waveform is triggered, it first sends a trigger parameter packet to the streaming server, then sends waveform data packets for the second preset time interval before the predetermined event waveform is triggered, and then continues to send trigger parameter packets and waveform data packets until the predetermined event waveform trigger ends; at the same time, before and after the predetermined event waveform is triggered, it maintains sending a status information packet to the streaming server every first preset time interval; In the triggered transmission parameter mode, the optical terminal intensity meter performs waveform trigger detection; in the absence of waveform trigger, it sends a status information packet to the streaming server every third preset time interval; when the predetermined event waveform is triggered, it sends a trigger parameter packet to the streaming server at a fourth preset time interval until the predetermined event waveform trigger ends; at the same time, before and after the predetermined event waveform is triggered, it continues to send a status information packet to the streaming server every first preset time interval. When the optical terminal intensity meter receives the application time period data packet from the streaming server, if it is in the continuous transmission waveform mode or the triggered transmission waveform mode and there is no waveform trigger; or if it is in the triggered transmission parameter mode and there is no waveform trigger, it actively sends the time period waveform data corresponding to the application time period data packet to the streaming server. If a predetermined event waveform is triggered, then the time period waveform data corresponding to the requested time period data packet is sent to the stream server after the predetermined event waveform trigger ends.

2. The method for on-demand retrieval of seismic intensity data as described in claim 1, characterized in that, After receiving a control command packet from a preset streaming server, the optical terminal intensity meter further includes: returning a response packet corresponding to the control command packet to the streaming server.

3. The method for on-demand retrieval of seismic intensity data as described in claim 1, characterized in that, The predetermined event waveform triggering method includes a threshold triggering method, which predefines a waveform triggering threshold. When a waveform that meets the waveform triggering threshold is detected, a triggering event is generated.

4. The method for on-demand retrieval of seismic intensity data as described in claim 1, characterized in that, The predetermined event waveform triggering method includes a time period triggering method, which predefines a triggering time period. When the triggering time period is reached, a triggering event is generated.

5. The method for on-demand retrieval of seismic intensity data as described in claim 3, characterized in that, The optical terminal intensity meter receives a trigger threshold setting control packet sent from the streaming server. The trigger threshold setting control packet is used to set the waveform trigger threshold.

6. The method for on-demand retrieval of seismic intensity data as described in claim 4, characterized in that, The optical terminal intensity meter receives a time period trigger control packet sent from the streaming server, and the time period trigger control packet is used to set the trigger time period.

7. The method for on-demand retrieval of seismic intensity data as described in any one of claims 1 to 6, characterized in that, The first preset time and the third preset time are both 10 seconds; the second preset time is 30 seconds; and the fourth preset time is 1 second.

8. A light terminal intensity meter, characterized in that, The optical terminal intensity meter is used to perform the earthquake intensity data on-demand retrieval method as described in any one of claims 1 to 7.

9. The optical terminal intensity meter as described in claim 8, characterized in that, The optical terminal intensity meter includes: An optical fiber modem, comprising an MCU and an optical communication module electrically connected to the MCU; the optical communication module is used to enable network access and data upload. A triaxial MEMS accelerometer is electrically connected to the MCU; the triaxial MEMS accelerometer is used to acquire triaxial acceleration data in real time. A magnetometer, electrically connected to the MCU; the magnetometer is used to acquire triaxial magnetic field data in real time. The fiber optic modem is used to provide a dual data transmission channel, including broadband communication and seismic intensity data.

10. A system for on-demand retrieval of earthquake intensity data, characterized in that, It includes a streaming server and multiple optical terminal intensity meters as described in claim 8 or 9 that communicate with the streaming server.

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