JP3963726B2 - Earthquake waveform data collection device and earthquake observation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to earthquake observation, and more particularly to a network system for earthquake observation.
[0002]
[Prior art]
In recent years, earthquake observation systems have been established in various local governments. This is aimed at establishing an initial response system in the event of an earthquake. This earthquake observation system collects and distributes seismic intensity information using a network when an earthquake occurs. Observation terminals are installed in each municipality of the local government. Since the observation terminal is equipped with an earthquake measuring instrument, it can acquire earthquake acceleration and seismic intensity (seismic intensity) data. A transmission / reception device is installed at the headquarters of the local government for the earthquake. When the observation terminal measures an earthquake having a specified seismic intensity or higher, the observation terminal transmits seismic intensity data of the earthquake to the transmission / reception device via a communication line. The transmission / reception device distributes the received seismic intensity data to various external facilities (for example, earthquake damage early evaluation system and fire department).
[0003]
[Problems to be solved by the invention]
An object of the present invention is to improve a conventional seismic observation system. Specifically, an object is to provide an earthquake observation system capable of collecting not only seismic intensity data but also seismic waveform data, and an earthquake waveform data collecting apparatus used in this system.
[0004]
[Means for Solving the Problems]
The seismic waveform data collection device according to the present invention is used in an earthquake observation system. This earthquake observation system Measure earthquake acceleration data and waveform data One or more observation terminals each having an earthquake measuring instrument, and each of these observation terminals measured Of acceleration data and waveform data, A transmission / reception device for receiving and transmitting acceleration data. The earthquake waveform data collection device according to the present invention receives acceleration data from a transmission / reception device and stores it. This seismic waveform data collection device determines whether acceleration data satisfies a predetermined collection condition, The current time is included in the designated time zone for receiving waveform data, and If it is determined that the acceleration data satisfies the collection condition, the observation terminal is requested for earthquake waveform data corresponding to the acceleration data. Thereafter, the seismic waveform data collection device receives the waveform data from the observation terminal and stores it.
[0005]
The seismic waveform data collection device of the present invention further receives the identification information of the observation terminal that transmitted the acceleration data together with the acceleration data from the transmission / reception device, and uses the identification information to identify the observation terminal that should request the waveform data May be.
[0006]
Moreover, the seismic waveform data collection device of the present invention may include an input means. In this case, the user may be able to set the collection conditions and the waveform data collection time zone by operating the input means.
[0007]
The earthquake observation system according to the present invention is Measure earthquake acceleration data and waveform data One or more observation terminals each having an earthquake measuring instrument, and each of these observation terminals measured Of acceleration data and waveform data, A transmission / reception device that receives and transmits acceleration data, and an earthquake waveform data collection device that can communicate with each of the observation terminals and the transmission / reception device are provided. When an earthquake occurs, the observation terminal acquires waveform data and acceleration data of the earthquake. The observation terminal transmits the acceleration data to the transmission / reception device. When the transmission / reception device receives the acceleration data, the transmission / reception device transmits the acceleration data to the seismic waveform data collection device. The seismic waveform data collection device receives and stores acceleration data. The seismic waveform data collection device determines whether or not the received acceleration data satisfies a predetermined collection condition. Earthquake waveform data collection device The current time is included in the designated time zone for receiving waveform data, and If it is determined that the acceleration data satisfies the collection condition, the observation terminal is requested for earthquake waveform data corresponding to the acceleration data. In response to this request, the observation terminal transmits waveform data to the seismic waveform data collection device. The earthquake waveform data collection device receives and stores the waveform data.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
[0009]
The seismic observation system of this embodiment is constructed using an existing seismic intensity information network system. The existing seismic intensity information network system does not automatically collect seismic waveform data for the purpose of establishing an initial action system when an earthquake occurs. However, facilities such as universities that conduct earthquake / eruption prediction research (hereinafter referred to as “research facilities”) require not only seismic intensity data but also waveform data as research data. Therefore, in this embodiment, an earthquake observation system capable of automatically collecting earthquake waveform data is constructed by adding an earthquake waveform data collection device to the seismic intensity information network system.
[0010]
FIG. 1 shows the configuration of the earthquake observation system 1 of the present embodiment. The earthquake observation system 1 is mainly composed of a plurality of observation terminals 2, communication network 3 and 4, a central facility 5, and a research facility 6. The earthquake observation system 1 automatically collects the waveform data of the earthquake measured by the observation terminal at the central facility 5 and automatically distributes it from the central facility 5 to the research facility 6. The central facility 5 collects waveform data from the observation terminal 2 via the communication line network 3. The central facility 5 distributes the waveform data to the research facility 6 via the communication line network 4. In the present embodiment, a multiple line network is used as the communication line network 3 and a public ISDN line network is used as the communication line network 4. However, it is not limited to these line networks. The earthquake observation system 1 also includes an epicenter information receiving device 40. The epicenter information receiving device 40 can communicate with the research facility 6 via the communication network 4. Although not shown, the epicenter information receiving apparatus 40 can communicate with the observation terminal 2 via the communication network 3. The epicenter information receiving device 40 unifies and manages seismic center information. This is installed, for example, in a university laboratory.
[0011]
The observation terminal 2 is installed in various municipalities of one local government. The observation terminal 2 is a measurement seismometer, and includes a measurement unit 10 that measures earthquake motion and a processing unit 11 that processes measurement data acquired by the measurement unit 10. The observation terminal 2 is installed in a seismometer room, for example. The processing unit 11 includes a communication interface with an external device. Therefore, the processing unit 11 can communicate with the central facility 5 via the communication network 3.
[0012]
The central facility 5 includes a transmission / reception device 20 and an earthquake waveform data collection device 30. These devices 20 and 30 can communicate with the observation terminal 2 via the communication network 3 respectively. The transmission / reception device 20 receives earthquake acceleration data and seismic intensity data from the observation terminal 2 and transmits these data to an external device. The seismic waveform data collection device 30 collects seismic waveform data from the observation terminal 2 and enables secondary use of the seismic waveform data.
[0013]
The transmission / reception device 20 is a single computer, and includes a communication unit 21, a control processing unit 22, and a storage unit 23. The communication unit 21 communicates with the observation terminal 2, the seismic waveform data collection device 30, and an external facility (not shown) under the control of the control processing unit 22. The communication unit 21 is provided with a modem for connection to the communication line network 3. The transmission / reception device 20 can receive earthquake acceleration data and seismic intensity data from the observation terminal 2 using this modem. However, the transmission / reception device 20 does not receive earthquake waveform data. The communication unit 21 is also provided with a LAN adapter for connection with the seismic waveform data collection device 30 and an external facility. The transmission / reception device 20 is LAN-connected to the seismic waveform data collection device 30 using this LAN adapter. The transmission / reception device 20 can communicate with an external facility using the LAN adapter and a router (not shown). The control processing unit 22 controls the overall operation of the transmission / reception device 20 and processes data received by the communication unit 21. The storage unit 23 stores data under the control of the control processing unit 22.
[0014]
The seismic waveform data collection device 30 includes a modem unit 31, a relay unit 32, an operation unit 33, a display unit 34, a backup unit 35, a LAN connection unit 36, and a control unit 37. The seismic waveform data collection device 30 may be a computer system in which a control program is installed.
[0015]
The modem unit 31 communicates with the observation terminal 2 via the communication network 3. Specifically, a request signal for seismic waveform data is transmitted to the observation terminal 2. In addition, earthquake waveform data is received from the observation terminal 2.
[0016]
The relay unit 32 relays the time calibration signal from the GPS 50 to the control unit 37. The relay unit 32 includes a GPS receiver, a GPS antenna, and an interface for connection with the control unit.
[0017]
The operation unit 33 is an input device for operating the earthquake waveform data collection device 30. The user can input operation instructions and data to the seismic waveform data collection device 30 by operating the operation unit 33. The operation unit 33 is provided with a keyboard and a mouse.
[0018]
The display unit 34 displays setting information and operation status of the seismic waveform data collection device 30. The display unit 34 is, for example, a CRT display or a liquid crystal display.
[0019]
The backup unit 35 is a standby power supply device that ensures the power supply of the earthquake waveform data collection device 30 when a power failure occurs. The backup unit 35 is configured by a UPS (uninterruptible power supply).
[0020]
The LAN connection unit 36 connects the seismic waveform data collection device 30 and the transmission / reception device 20 through a local area network (LAN). The LAN connection unit 36 includes a LAN adapter. This LAN adapter is connected to a switching hub (not shown) via a LAN cable. A LAN adapter included in the communication unit 21 of the transmission / reception device 20 is also connected to the switching hub via a LAN cable. Thereby, the earthquake waveform data collection device 30 and the transmission / reception device 20 are LAN-connected. The LAN connection unit 36 receives earthquake acceleration data and seismic intensity data from the transmission / reception device 20 via the LAN. In addition, the LAN connection unit 36 periodically transmits a health message to the transmission / reception device 20 in order to check a communication failure with the transmission / reception device 20. The switching hub connected to the LAN connection unit 36 is connected to the communication line network 4 via a router and DSU (not shown). Therefore, the seismic waveform data collection device 30 can communicate with the research facility 6 via the communication network 4.
[0021]
The control unit 37 controls the overall operation of the seismic waveform data collection device 30 and processes various earthquake data transmitted from the observation terminal 2 and the transmission / reception device 20. The control unit 37 is a computer including a CPU (Central Processing Control Device) and a storage device. A control program is installed in the storage device. The control unit 37 operates according to this control program. The control unit 37 also includes an interface with each of the modem unit 31, the relay unit 32, the operation unit 33, the display unit 34, the backup unit 35, and the LAN connection unit 36.
[0022]
FIG. 2 is a functional block diagram of the control unit 37. The control unit 37 has functions as setting control means 71, pair transmission / reception apparatus means 72, pair observation terminal means 73, storage management means 74, mail creation management means 75, and main control means 76. Each of these means is embodied by a CPU and a storage device.
[0023]
The setting control means 71 processes setting information input by the user via the operation unit 33 and reflects the setting information on the display on the display unit 34. The transmission / reception device means 72 controls the operation of the LAN connection unit 36 and thereby controls communication with the transmission / reception device 20. The counter-observation terminal unit 73 controls the operation of the modem unit 31 and thereby controls communication with the observation terminal 2. The storage management means 74 stores various earthquake information and management information. In addition, the storage management unit 74 registers, searches, and updates these pieces of information. The mail creation management means 75 creates an electronic mail with the earthquake information as an attached file, and transmits the electronic mail to the research facility 6 via the LAN connection unit 36. The main control means 76 performs a calculation using earthquake information calculation and earthquake information.
[0024]
With reference to FIG. 1 again, the research facility 6 will be described. The research facility 6 includes a waveform data receiving device 60 and one or more terminal devices 62 connected to the waveform data receiving device. The waveform data receiving device 60 can communicate with the earthquake waveform data receiving device 30 via the communication network 4. The waveform data receiving device 60 can also communicate with the epicenter information receiving device 40 via the communication network 4.
[0025]
The waveform data receiving device 60 receives earthquake information from the earthquake waveform data collecting device 30 as an electronic mail. This earthquake information includes waveform data. Further, the waveform data receiving device 60 receives the epicenter information from the epicenter information receiving device 40. This epicenter information is sent from the observation terminal 2 to the epicenter information receiving device 40 via the communication network 3. The waveform data receiving device 60 converts the various earthquake information received in this way into common earthquake data. The common earthquake data has a format that can be used in common by each terminal device 62. The common earthquake data is transmitted from the waveform data receiving device 60 to the terminal device 62. The researcher can access the common earthquake data by operating the terminal device 62.
[0026]
Below, operation | movement of the earthquake observation system 1 is demonstrated in detail, referring FIGS. 3-10. Here, FIGS. 3 to 7 are flowcharts showing the flow of various processes in the earthquake observation system 1. 8-10 has shown the screen displayed on the display part 34 of an earthquake waveform data collection device.
[0027]
First, FIG. 3 will be described. FIG. 3 shows the flow of processing executed by the observation terminal 2, the transmission / reception device 20, and the seismic waveform data collection device 30, respectively.
[0028]
Each observation terminal 2 stands by for the occurrence of an earthquake (steps S102 and S104). When an earthquake occurs (step S104: YES route), the measurement unit 10 measures the earthquake and acquires measurement data (step S106). This measurement data includes earthquake waveform data. Next, the processing unit 11 processes the measurement data and extracts seismic intensity information (step S108). The seismic intensity information here is the same as that distributed by the existing seismic intensity information network system, and includes the earthquake occurrence time, seismic acceleration, and seismic intensity scale (seismic intensity). The seismic waveform data and the extracted seismic intensity information are stored in a storage device in the processing unit 11. Seismic waveform data is also printed. Thereafter, the processing unit 11 transmits the seismic intensity information to the transmission / reception device 20 (step S110).
[0029]
The transmission / reception device 20 waits for reception of seismic intensity information from the observation terminal 2 (steps S202 and S204). When the communication unit 21 receives seismic intensity information from the observation terminal 2 (step S204: YES route), the control processing unit 22 processes the seismic intensity information (step S206). Specifically, the identification information of the observation terminal 2 that transmitted the seismic intensity information is acquired, and the seismic intensity information is stored in the storage unit 23 together with the identification information of the observation terminal. This terminal identification information may be an identification number (ID) assigned in advance to each observation terminal, or may be location information of the observation terminal. The transmitting / receiving device 20 can transmit the seismic intensity information stored in this manner in response to a request from an external device (for example, a seismic intensity information receiving device installed in a related government office). This is the same as the existing seismic intensity information network system. Thereafter, when the received seismic intensity information indicates a seismic intensity greater than or equal to a predetermined value, the control processing unit 22 transmits the seismic intensity information to the seismic waveform data collection device 30 (step S208). At this time, identification information of the observation terminal that transmitted the seismic intensity information is also transmitted.
[0030]
Next, processing executed by the earthquake waveform data collection device 30 will be described. First, the seismic waveform data collection device 30 displays a basic screen on the display unit 34 under the control of the control unit 37 (step S302).
[0031]
FIG. 8 shows an example of the basic screen. A collection status field 102 is provided on the left side of the basic screen. As will be described later, the collection status column 102 displays character information representing the waveform data collection status. In the upper right part of the basic screen, a date display area 104 and an operation status column 106 are provided. The date and time display area 104 displays the current date and time. In the operation status column 106, character information indicating the operation status of the seismic waveform data collection device 30 (for example, “system in operation”, “waveform data collecting ...”) is displayed. A set value field 108 and a system stop button 110 are provided in the lower right part of the basic screen. In the setting value column 108, the collection start time, collection end time, and collection acceleration level of earthquake waveform data are displayed. These values can be set by the user. As will be described later, the earthquake waveform data collection device 30 collects the waveform data of the earthquake that satisfies the “collection acceleration level” condition when the collection start time is reached, and stops collecting the earthquake waveform data when the collection end time is reached. A setting value change button 112 is provided below the setting value column 108. When the setting change button 112 is pressed by operating the operation unit 33, a setting value change screen is displayed.
[0032]
FIG. 9 shows a setting value change screen. The user can set the waveform data collection start time, collection time, and collection acceleration level via the set value change screen. The setting value change screen is provided with a collection time setting field 202 and a collection level setting field 204. In the collection time setting column 202, columns 202a and 202b for entering the collection start time and the collection time are provided. In these fields, numerical values can be entered by operating the operation unit 33. The collection level setting column 204 is provided with a column 204a for entering an acceleration serving as a reference value for whether to collect waveform data, and check columns 204b, 204c, and 204d for setting the range of acceleration to be collected. Yes. A numerical value can be entered in the acceleration entry column 204a by operating the operation unit 33. Further, by operating the operation unit 33, any of the check columns 204b, 204c, and 204d can be checked. If the acceleration is entered and any of “all”, “above” and “less than” is checked, the condition for collecting the seismic waveform data (ie, “collected acceleration level” in FIG. 8) is determined. A setting button 208 and a return button 210 are provided at the bottom of the setting value change screen. When the setting button 208 is pressed by operating the operation unit 33, the setting value is updated to the content displayed on the setting change screen. Further, the screen displayed on the display unit 34 changes from the setting value change screen to the basic screen. At this time, the setting value displayed on the basic screen is also updated. On the other hand, when the return button 210 is pressed by the operation of the operation unit 33, the display returns to the basic screen without updating the set value.
[0033]
Reference is again made to FIG. The system stop button 110 is an operation button for stopping the collection of waveform data. When the system stop button 110 is pressed, the seismic waveform data collection device 30 no longer collects waveform data. If the system stop button 110 is pressed during the collection of waveform data, the seismic waveform data collection device 30 stops collecting subsequent waveform data after completing the collection of the current waveform data. When the system stop button 110 is pressed again, the seismic waveform data collection device 30 collects waveform data again.
[0034]
Refer to FIG. 3 again. After displaying the basic screen, the seismic waveform data collection device 30 performs time calibration processing (step S304). In this process, the control unit 37 determines whether or not the current time has reached a predetermined calibration time. Information on the current time and the calibration time is stored in the storage management means 74. Calibration times are set in advance at appropriate time intervals. When the control unit 37 determines that the calibration time has not been reached, the time calibration process is terminated. On the other hand, when determining that the calibration time has been reached, the control unit 37 issues a command to the relay unit 32 so as to acquire a time calibration signal from the GPS 50. The relay unit 32 receives the time calibration signal from the GPS 50 and transfers it to the control unit 37. The main control means 76 of the control unit 37 calibrates the current time information using this time calibration signal. As described above, the seismic waveform data collection device 30 communicates with the GPS 50 at a predetermined time to calibrate current time information owned by itself.
[0035]
Next, the earthquake waveform data collection device 30 confirms whether or not seismic intensity information has been received from the transmission / reception device 20 (step S306). Specifically, the transmission / reception device means 72 checks whether or not the LAN connection unit 36 has received seismic intensity information. When it is confirmed that the seismic intensity information has been received (step S306: YES route), the seismic waveform data collection device 30 executes seismic intensity information processing (step S308).
[0036]
FIG. 4 is a flowchart showing the flow of seismic intensity information processing. The earthquake waveform data collection device 30 stores the seismic intensity information received from the transmission / reception device 20 (step S402). When the LAN connection unit 36 receives seismic intensity information from the transmission / reception device 20, the seismic intensity information is stored in the storage management means 74. The terminal identification information transmitted from the transmission / reception device 20 together with the seismic intensity information is also stored in the storage management means 74. At this time, seismic intensity information and terminal identification information are associated with each other to form one data set.
[0037]
Next, the main control unit 76 determines whether or not the received seismic intensity information satisfies a preset collection condition (step S404). Thus, the seismic waveform data collection device 30 does not unconditionally collect all the waveform data of the earthquake from which seismic intensity information is acquired, but collects waveform data only for earthquakes that satisfy a predetermined condition. This collection condition is determined based on the earthquake acceleration. The collection condition in the present embodiment is the “collection acceleration level” described above, and can be set by the user. As shown in FIG. 9, the collection conditions can be set in three ways. First, the acceleration data included in the seismic intensity information is greater than or equal to the set acceleration value, second, the acceleration data included in the seismic intensity information is less than the set acceleration value, and third, Collect waveform data for all earthquakes that acquired seismic intensity information. The “acceleration value” used in the present embodiment is a composite acceleration of three components.
[0038]
If it is determined that the seismic intensity information satisfies the collection condition (YES route of step S404), the storage management means 74 stores the collection instruction information in association with the seismic intensity information (step S406). This collection instruction information is data for notifying each means of the control unit 37 that earthquake waveform data should be collected. As will be described later, the control unit 37 collects waveform data only for earthquakes whose collection instruction information is associated with seismic intensity information. The collection instruction information may be, for example, a flag in a specific state attached to the seismic intensity information and terminal identification information data set. In other words, a flag is added when storing the data set, and when the collection condition is satisfied, the state of the flag is changed from the initial state (for example, the flag is turned on) to store the collection instruction information. Also good. The collection instruction information in this case is a flag that has been changed from the initial state (for example, an on-state flag).
[0039]
When the storage of the collection instruction information (step S406) is completed or it is determined that the collection conditions are not satisfied (step S404: NO route), the seismic intensity information processing ends.
[0040]
Refer to FIG. 3 again. When the seismic intensity information processing (step S308) ends, the seismic waveform data collection device 30 determines whether or not the current time is included in a predetermined collection time zone (step S310). Here, the “collection time zone” is a time zone from the collection start time to the collection end time displayed in the set value column 108 of the basic screen (FIG. 8). The main control unit 76 accesses the current time information, the collection start time information, and the collection time information stored in the storage management unit 74, and performs the determination in step S310.
[0041]
When it is determined that the current time is included in the collection time zone (step S310: YES route), the seismic waveform data collection device 30 executes a waveform data collection process (step S312). FIG. 5 is a flowchart showing the flow of waveform data collection processing. Hereinafter, the waveform data collection process will be described in detail with reference to FIG.
[0042]
First, the setting control means 71 displays the characters “While collecting waveform data ...” in the operation status field 106 of the basic screen (step S502). Next, the main control means 76 confirms the presence / absence of collection instruction information in the storage management means 74 (step S504). When the collection instruction information is not stored in the storage management means 74 (step S504: NO route), the seismic waveform data is not collected. In this case, the setting control means 71 changes the character in the operation status column 106 of the basic screen from “While collecting waveform data ...” to “System in operation” (step S516). On the other hand, when the collection instruction information is stored in the storage management means 74 (step S504: YES route), the anti-observation terminal means 73 controls the modem unit 31 to transmit the request information to the observation terminal 2 (step) S506). The destination observation terminal 2 is specified by the terminal identification information associated with the collection instruction information. The request information includes information (for example, earthquake occurrence time) that identifies an earthquake. The seismic waveform data collection device 30 requests the seismic waveform data from the observation terminal 2 in this way.
[0043]
Reference is now made again to FIG. Upon receiving the request information (step S112: YES route), the observation terminal 2 transmits the earthquake waveform data specified by the request information to the earthquake waveform data collection device 30 (step S114).
[0044]
Refer to FIG. 5 again. The waveform data transmitted from the observation terminal 2 is received by the modem unit 31 (step S508). The setting control means 71 displays characters for notifying the collection status in the collection status column 102 of the basic screen according to the waveform data reception status (step S510).
[0045]
FIG. 10 shows an example of a basic screen displayed during the seismic waveform data collection process. As shown in this figure, when the reception of the waveform data starts, the setting control means 71 displays the characters “waveform data collection start” in the collection status column 102. In addition, the date and time when reception started and the installation location (for example, the name of the municipality) of the observation terminal 2 are also displayed. The information on the installation location is transmitted by the observation terminal 2 together with the waveform data. When the reception of the waveform data is completed, the setting control means 71 displays the characters “waveform data collection complete” in the collection status column 102. In addition, the date and time of completion of reception and the setting location of the observation terminal 2 are also displayed.
[0046]
The received waveform data is stored in the storage management means 74 (step S512). At this time, the waveform data is stored in association with seismic intensity information and terminal identification information of the same earthquake. Further, the collected management information 74 is stored in association with the seismic intensity information and the terminal identification information. The collected information may be, for example, a flag in a specific state.
[0047]
Next, the main control means 76 determines whether or not all the collection instruction information has been processed (step S514). The main control means 76 confirms the presence / absence of seismic intensity information with the collection instruction information but without the collected information. When such seismic intensity information remains, it is determined that there is unprocessed collection instruction information (step S514: NO route). In this case, the main control means 76 determines whether or not the current time is included in the collection time zone (step S515). If it is determined that the current time is included in the collection time zone (step S515: YES route), the process returns to step S506, and the process from step S506 to step S514 is executed for another collection instruction information. . In this way, during the collection time period, the collection of waveform data is repeated until all the collection instruction information is processed. When the collected information is attached to all the seismic intensity information accompanied by the collection instruction information, it is determined that all the collection instruction information has been processed (step S514: YES route). In this case, the setting control means 71 changes the character “While collecting waveform data ...” in the operation status field 106 of the basic screen to “system in operation” (step S516). Thereby, the waveform data collection process is completed. Even when it is determined in step S515 that the current time is not included in the collection time zone (step S515: NO route), the characters “system in operation” are displayed (step S516), and the waveform data collection process is completed. . In this case, unprocessed collection instruction information is processed in the next collection time zone.
[0048]
In this embodiment, when an earthquake occurs during the waveform data collection process, the earthquake waveform data collection apparatus 30 performs an interrupt process on seismic intensity information of the earthquake. After the interruption process is completed, the waveform data collection process is resumed. The interrupted earthquake waveform data is collected during the resumed waveform data collection process. Thus, even for an earthquake that occurred during the waveform data collection process, the waveform data can be collected during the waveform data collection process.
[0049]
FIG. 6 is a flowchart showing a flow of interrupt processing executed when an earthquake occurs during the waveform data collection processing. When an earthquake occurs during the waveform data collection process, the earthquake waveform data collection device 30 receives a collection stop command from the transmission / reception device 20 (step S602). When receiving the seismic intensity information from the observation terminal 2, the transmitting / receiving apparatus 20 transmits a collection stop command to the waveform data collecting apparatus 30 before transmitting the seismic intensity information. This collection stop command also has a role of notifying the waveform data collection device 30 of the start of transmission of seismic intensity information. The collection stop command is received by the pair transmitting / receiving device means 72. In response to the collection stop command, the earthquake waveform data collection device 30 interrupts the waveform data collection process (step S604). The transmission / reception device 20 may transmit a collection stop command only during execution of the waveform data collection process, or may always transmit a collection stop command regardless of the presence or absence of the waveform data collection process. In either case, if a collection stop command is received during the waveform data collection process, the waveform data collection process is interrupted. Next, the setting control means 71 displays the characters “stop message received” in the operation status field 106 of the basic screen (step S606). As a result, the user is notified of the interruption of waveform data collection.
[0050]
When the LAN connection unit 36 receives seismic intensity information from the transmission / reception device 20 (step S608), processing similar to the above-described seismic intensity information processing (FIG. 4) is executed. The storage management unit 74 stores the seismic intensity information and the terminal identification information from the transmission / reception device 20 (step S610). The main control means 76 determines whether or not the received seismic intensity information satisfies a preset collection condition (step S612). When it is determined that the seismic intensity information satisfies the collection condition, the storage management unit 74 stores the collection instruction information in association with the seismic intensity information (step S614). On the other hand, if it is determined that the collection condition is not satisfied (step S612: NO route), the collection instruction information is not attached to the seismic intensity information.
[0051]
The earthquake waveform data collection device 30 receives a collection restart command from the transmission / reception device 20 (step S616). When the transmission / reception device 20 completes the transmission of the seismic intensity information and the terminal identification information related to one earthquake, the transmission / reception device 20 transmits a collection restart command to the earthquake waveform data collection device 30. This collection restart command also has a role of notifying the waveform data collection device 30 of the end of transmission of seismic intensity information. The collection restart command is received by the pair transmitting / receiving device means 72.
[0052]
In response to the collection restart command, the earthquake waveform data collection device 30 determines whether or not the current time is included in the collection time zone (step S617). When the seismic waveform data collection device 30 determines that the current time is included in the collection time zone (step S617: YES route), it resumes the waveform data collection processing (step S618). The setting control means 71 displays the characters “Resume message received” in the operation status field 106 of the basic screen (step S620). As a result, the user is notified of the resumption of waveform data collection.
[0053]
On the other hand, when it is determined that the current time is not included in the collection time zone (step S617: NO route), the process proceeds to step S516 (FIG. 5) of the waveform data collection process. The characters “System in operation” are displayed in the operation status field 106 of the basic screen, and the waveform data collection process is completed.
[0054]
The transmission / reception device 20 may transmit a collection restart command only while the waveform data collection process is interrupted, or may transmit a collection restart command regardless of the presence or absence of the interrupt. In any case, if a collection restart command is received during the interruption of the waveform data collection process, the processes after step S617 are performed.
[0055]
Refer to FIG. 3 again. When the waveform data collection process (step S312) is completed, the seismic waveform data collection device 30 determines whether or not the current time has reached a predetermined mail delivery time (step S314). This determination is also performed when it is determined in step S310 that the current time is not included in the collection time zone. The main control unit 76 accesses the current time information and the mail delivery time information stored in the storage management unit 74, and performs the determination in step S314. The mail delivery time may be arbitrarily set by the user by operating the operation unit 33.
[0056]
When it is determined that the current time has reached the mail delivery time (step S314: YES route), the earthquake waveform data collection device 30 executes mail processing (step S316). FIG. 7 is a flowchart showing the flow of mail processing. Hereinafter, the mail processing will be described in detail with reference to FIG.
[0057]
First, the earthquake waveform data collection device 30 creates an e-mail for distributing earthquake information to the research facility 6 (step S702). An e-mail is created by the mail creation management means 75. Here, two types of mail are created. The first is data mail, and the second is header mail.
[0058]
The data mail is a mail notifying information on one earthquake. When transmitting information about a plurality of earthquakes, a data mail is created for each of these earthquakes. A data file with compressed earthquake information is attached to the data mail. In this data file, seismic intensity information (earthquake occurrence time, earthquake occurrence location, earthquake acceleration, and seismic intensity) and waveform data for one minute are compressed.
[0059]
The header mail is a mail notifying the transmission of the data mail. One header mail is created for each mail process. In the body of the header mail, the number of data mails to be transmitted and the transmission date and time of the header mail are described.
[0060]
The mail creation management means 75 searches the above collected information and identifies the earthquake from which the waveform data was acquired. The mail creation management means 75 reads data relating to the specified earthquake from the storage management means 74 and creates a data mail. Also, the header mail is created by counting the number of identified earthquakes. These mails are stored in the storage management means 74.
[0061]
Next, the mail creation management means 75 sequentially delivers a header mail and a data mail to the research facility 6 (step S704). These mails are transmitted to the address designated by the research facility 6 via the LAN connection unit 36 and the communication line network 4. The storage management unit 74 stores the transmitted information in association with the mail that has been transmitted. Depending on the presence or absence of sent information, sent mail and unsent mail can be distinguished. Thus, the mail process is completed.
[0062]
In this embodiment, the waveform data receiving device 60 of the research facility 6 includes a mail server (not shown). The header mail and the data mail are transmitted to the mail server and stored therein.
[0063]
Refer to FIG. 3 again. When the mail process (step S316) is completed, the process returns to step 302. Also, if it is determined in step S314 that the current time has not reached the mail delivery time, the process returns to step S302. Thereafter, the processing from step S302 to step S314 is repeated.
[0064]
The waveform data receiving device 60 of the research facility 6 receives the epicenter information from the epicenter information receiving device 40 in addition to the header mail and the data mail from the seismic waveform data collecting device 30. The waveform data receiving device 60 generates and stores common earthquake data using the received data mail and epicenter information. The common earthquake data has a format that can be used in common by all the terminal devices 62. The common earthquake data includes earthquake occurrence time, seismic intensity information, epicenter information, and seismic waveform data. Each terminal device 62 can access the waveform data receiving device 60 and download the common earthquake data to the terminal device 62. Therefore, each terminal device 62 can perform earthquake research using waveform data. As a result, earthquake research using waveform data can be carried out smoothly by multiple researchers.
[0065]
Below, the effect of the earthquake observation system 1 of this embodiment is demonstrated.
[0066]
First, seismic waveform data can be automatically collected from the observation terminals 2 installed at various locations. The conventional seismic observation system cannot collect the seismic waveform data even though the observation terminal 2 acquires the seismic waveform data. The present inventors have overcome the difficulties associated with the collection of waveform data and have realized an earthquake observation system that can collect not only seismic intensity information but also waveform data.
[0067]
Second, it is possible to collect waveform data that meets various research objectives. This is because the user can set the earthquake acceleration range (collection acceleration level described above) for collecting waveform data.
[0068]
Third, there is little risk of line failure. This is because the transmitting / receiving device 20 collectively receives the seismic intensity information from the observation terminal 2 and the seismic waveform data collecting device 30 collects the waveform data in response to the transmission of the seismic intensity information by the transmitting / receiving device 20. The line connecting the observation terminal 2 and the seismic waveform data collection device 30 (line of the communication network 3) is different from the line connecting the transmission / reception device 20 and the seismic waveform data collection device 30 (LAN cable). The seismic intensity information is transmitted from the transmission / reception device 2 to the seismic waveform data collection device 30 through the LAN without using the communication network 3. For this reason, compared with the case where the seismic waveform data collection device 30 directly receives seismic intensity information from the observation terminal 2, the communication line network 3 is used less frequently. This reduces the risk of line failure.
[0069]
Fourth, even if an earthquake occurs during reception of waveform data, the waveform data of the earthquake is not missed. This is because when an earthquake occurs during the reception of waveform data, the collection of waveform data is interrupted, and it is determined whether or not to collect waveform data for that earthquake. When the acceleration of the earthquake satisfies the collection condition, the waveform data of the earthquake is collected in the resumed waveform data collection process. Therefore, the collection of waveform data is not carried over to the next time.
[0070]
Fifth, the collected waveform data can be automatically distributed to the research facility 6. Therefore, the research facility 6 can smoothly perform earthquake research using waveform data.
[0071]
Sixth, the research facility 6 can acquire and use waveform data at an appropriate time. This is because the seismic waveform data collection device 30 delivers the waveform data to the research facility 6 by electronic mail. Since a widely distributed distribution method called electronic mail is used, the research facility 6 can receive waveform data without preparing a special device. Since the e-mail can be received at any time, the research facility 6 can acquire the waveform data on a convenient schedule.
[0072]
Seventh, the influence on the operation of devices other than the earthquake waveform data collection device 30 in the earthquake observation system 1 can be suppressed. This is because the seismic waveform data can be set to be collected only during a certain time period. In the existing earthquake observation system, a periodic communication test is performed between the observation terminal 2 and the transmission / reception device 20. Such a communication test can also be performed in the earthquake observation system 1 of the present embodiment. In this case, if the collection time of the seismic waveform data is set while avoiding the communication test time zone, the seismic waveform data can be collected without interfering with the communication test.
[0073]
Eighth, accurate timekeeping management required as an earthquake observation system is possible. This is because the current time information is calibrated by the earthquake waveform data collection device 30 communicating with the GPS 50.
[0074]
The present invention has been specifically described above based on the embodiment. However, the present invention is not limited to the above embodiment. The present invention can be variously modified without departing from the gist thereof. For example, each of the above processes can be executed in any order as long as the effects of the present invention can be achieved.
[0075]
The seismic waveform data collection device 30 may perform the following processing in addition to the above processing. In other words, the seismic waveform data collection device 30 may transmit a health message via the LAN to the transmission / reception device 20 and confirm whether or not a line confirmation mail returned from the transmission / reception device 20 has arrived. Thereby, the presence or absence of a communication failure between the earthquake waveform data collection device 30 and the transmission / reception device 20 can be inspected. It is usually sufficient to confirm the arrival of the line confirmation mail once a day. Specifically, the mail creation management means 75 searches for a line confirmation mail in the mail server included in the LAN connection unit 36 at a predetermined time. When the line confirmation mail is not found, the setting control means 71 displays a dialog box on the display unit 34 to notify the communication path failure. By performing such processing, a communication failure between the seismic waveform data collection device 30 and the transmission / reception device 20 can be automatically discovered.
[0076]
【The invention's effect】
According to the present invention, seismic waveform data can be automatically collected from observation terminals installed in various places.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an earthquake observation system of an embodiment.
FIG. 2 is a block diagram showing a configuration of a control unit.
FIG. 3 is a flowchart showing processing executed by an observation terminal, a transmission / reception device, and an earthquake waveform data collection device.
FIG. 4 is a flowchart showing seismic intensity information processing.
FIG. 5 is a flowchart showing a waveform data collection process.
FIG. 6 is a flowchart showing interrupt processing executed during waveform data collection processing;
FIG. 7 is a flowchart showing mail processing.
FIG. 8 is a diagram showing a basic screen.
FIG. 9 is a diagram showing a setting change screen.
FIG. 10 is a diagram showing a basic screen displayed during the waveform data collection process.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Earthquake observation system, 2 ... Observation terminal, 3 and 4 ... Communication line, 5 ... Central facility, 6 ... Research facility, 20 ... Transmission / reception apparatus, 30 ... Earthquake waveform data collection device, 40 ... Earthquake source information reception device, 50 ... GPS, 60... Waveform data receiving device.

Claims (12)

An earthquake waveform data collection device for use in an earthquake observation system,
The earthquake observation system includes one or more observation terminals each having an earthquake measuring instrument that measures earthquake acceleration data and waveform data, and the acceleration data among the acceleration data and the waveform data measured by each of the observation terminals. A transmission / reception device for receiving and transmitting
Receiving and storing the acceleration data from the transceiver;
Determining whether the acceleration data satisfies a predetermined collection condition;
When the current time is included in the specified time period for receiving the waveform data, which is further the acceleration data is determined that the collecting condition is satisfied, the said waveform data of seismic corresponding to the acceleration data Request to the observation terminal,
Receiving and storing the waveform data from the observation terminal;
Earthquake waveform data collection device. The collection condition is that acceleration data is greater than or equal to a reference value, or acceleration data is less than a reference value,
The earthquake waveform data collection device according to claim 1, wherein a user can set the reference value. The earthquake waveform data collection device according to claim 1 or 2, wherein a time zone for receiving earthquake waveform data is set,
When it is determined that the acceleration data satisfies the collection condition, the collection instruction information is stored in association with the acceleration data,
Confirm the presence of the collection instruction information in the time zone,
When it is confirmed that there is the collection instruction information, for all the acceleration data associated with the collection instruction information, request the observation terminal for earthquake waveform data corresponding to the acceleration data,
The earthquake waveform data collection device according to claim 1 or 2. When the occurrence of an earthquake is notified from the transmitting / receiving device during the reception of the waveform data from the observation terminal, the reception of the waveform data is interrupted,
Receive and store acceleration data of the earthquake, determine whether the acceleration data satisfies the collection condition, and when the acceleration data determines that the collection condition is satisfied, associate it with the acceleration data Stores collection instruction information,
Resuming reception of the waveform data,
Among the acceleration data associated with the collection instruction information, the earthquake waveform data is not collected, and the earthquake waveform data is requested to the observation terminal.
The earthquake waveform data collection device according to claim 3. When the predetermined mail delivery time comes, create an email containing the waveform data received from the observation terminal,
Sending the e-mail to an external device;
The earthquake waveform data collection device according to claim 1. The earthquake waveform data collection device according to any one of claims 1 to 5, which owns current time data,
The earthquake waveform data collection device according to claim 1, wherein the current time data is calibrated by communicating with a satellite. One or more observation terminals each having an earthquake measuring instrument for measuring earthquake acceleration data and waveform data, and transmission / reception for receiving and transmitting the acceleration data among the acceleration data and the waveform data measured by each of the observation terminals An earthquake observation system comprising: an apparatus; and an earthquake waveform data collection device capable of communicating with each of the observation terminals and the transmission / reception device,
When an earthquake occurs, the observation terminal obtains the waveform data and the acceleration data,
The observation terminal transmits the acceleration data of the acceleration data and the waveform data to the transmission / reception device,
When the transmission / reception device receives the acceleration data, the transmission / reception device transmits the acceleration data to the earthquake waveform data collection device,
The seismic waveform data collection device receives and stores the acceleration data;
The seismic waveform data collection device determines whether the acceleration data satisfies a predetermined collection condition,
The seismic waveform data collection device corresponds to the acceleration data when it is determined that the current time is included in a designated time zone for receiving the waveform data and the acceleration data satisfies the collection condition. the waveform data to be requested to the observation terminal,
In response to this request, the observation terminal transmits the waveform data to the earthquake waveform data collection device,
The seismic waveform data collection device receives and stores the waveform data;
Earthquake observation system. The collection condition is that acceleration data is greater than or equal to a reference value, or acceleration data is less than a reference value,
The earthquake observation system according to claim 7, wherein a user can set the reference value. The earthquake observation system according to claim 7 or 8, wherein a time zone for receiving earthquake waveform data is set,
The earthquake waveform data collection device
When it is determined that the acceleration data satisfies the collection condition, the collection instruction information is stored in association with the acceleration data,
Confirm the presence of the collection instruction information in the time zone,
When it is confirmed that there is the collection instruction information, for all the acceleration data associated with the collection instruction information, request the observation terminal for earthquake waveform data corresponding to the acceleration data,
The earthquake observation system according to claim 7 or 8. When the transmission / reception device receives acceleration data from the observation terminal, it transmits an earthquake notification signal to the earthquake waveform data collection device before transmitting the acceleration data,
The earthquake waveform data collection device
When receiving the earthquake notification signal during reception of the waveform data from the observation terminal, the reception of the waveform data is interrupted,
Receive and store the acceleration data from the transmitter / receiver, determine whether the acceleration data satisfies the collection condition, and respond to the acceleration data when the acceleration data determines that the collection condition is satisfied And store the collection instruction information,
Resuming reception of the waveform data,
Among the acceleration data associated with the collection instruction information, the earthquake waveform data is not collected, and the earthquake waveform data is requested to the observation terminal.
The earthquake observation system according to claim 9. The earthquake observation system according to any one of claims 7 to 10, further comprising an earthquake waveform data receiving device capable of communicating with the earthquake waveform data collecting device.
The earthquake waveform data collection device
When the predetermined mail delivery time comes, create an email containing the waveform data received from the observation terminal,
Sending the e-mail to the seismic waveform data receiving device;
The earthquake observation system in any one of Claims 7-10.   The earthquake observation system according to any one of claims 7 to 11, wherein the earthquake waveform data collection device owns current time data and calibrates the current time data by communicating with a satellite.

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