JP2008180514A - Device, system and method for recording tectonic shake data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device, system and method for recording tectonic shake data, capable of recording the tectonic shake from starting without fail to catch though it is a trigger recording method. <P>SOLUTION: If the tectonic shake level of earthquake anticipated from the information of urgent earthquake news flash is larger than or equal to a prescribed value, and if the anticipated arrival time is earlier than the anticipation time, the seismic shake data are characteristically recorded by going back to the anticipated arrival time for recording the seismic shake data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vibration data recording apparatus, a vibration data recording system, and a vibration data recording method for recording data with a seismometer using an emergency earthquake warning.

Conventionally, it is necessary to inform the predicted strength of earthquakes and the predicted arrival time (time), to assist in preparing for the earthquake, and to prevent disasters. In addition to determining, predicting the seismic wave that reaches a specific location based on the real-time information received by the receiving means, and notifying the arrival of the predicted seismic wave, the seismic parameters determined by the seismic observation network There was an earthquake prediction immediate notification system that transmits an earthquake wave faster than the point arrived at the point, and immediately calculates and displays the necessary information of the point in consideration of the position and seismological characteristics of the point.
JP 2003-66152 A Shiro Hirotoshi and Saburo Sasakawa, distance attenuation formula of maximum acceleration and maximum speed considering fault type and ground condition, Architectural Institute of Japan, No.523, 63-70, 1999 Hiroshi Ueno, Shinichi Hatakeyama, Yasushi Akitagawa, Satoshi Funasaki, Nobuo Hamada, Improvement of the seismic center determination method of the Japan Meteorological Agency-Improvement of shallow velocity structure and weight function, Seismic time signal, 65, 123-134, 2002

  Conventional seismometer data recording methods include a continuous recording method (continuous recording method) and a recording method (trigger recording method) that records when a certain level of vibration is detected. .

  However, in the continuous recording method, the earthquake can be recorded from the start of the shake to the end of the shake, but the capacity of the data is increased, and the capacity of the storage means for storing the data is required. Since the trigger recording method records only when a certain level of vibration is detected, the data volume is small. As shown in FIG. 10, the seismometer observed a certain level of vibration in (1). In this case, the data temporarily stored in the memory in (2) is traced back for a certain time, and the vibration is recorded in (3). For example, as shown in FIG. If this continues, recording may not be possible from the beginning of shaking.

  The present invention relates to such a vibration data recording device, a vibration data recording system, and a vibration data recording method, which is a trigger recording method, and a vibration data recording device capable of recording without missing the vibration from the start of shaking, The object is to provide a vibration data recording system and a vibration data recording method.

  In order to solve the above problems, a vibration data recording apparatus of the present invention includes a communication unit that receives emergency earthquake warnings, temporary storage means that repeatedly stores vibration data for a predetermined time, a data recording apparatus that records vibration data, And a processing unit having a trigger processing device for determining whether to record vibration data with the data recording device from the information received by the communication unit, the processing unit receiving the emergency earthquake received by the communication unit Predict the earthquake vibration level and arrival time from information such as breaking news, and if the predicted earthquake vibration level is more than the predetermined value and the predicted arrival time is earlier than when the prediction was executed, go back to the predicted arrival time Vibration data is recorded on the data recording device from the temporary storage means.

  In addition, the processing unit records the vibration data in the data recording device from the time when the prediction is executed when the predicted vibration level of the earthquake is a predetermined value or more and the predicted arrival time is after the time when the prediction is executed. It is characterized by making it.

  Furthermore, the seismic data recording system of the present invention predicts and sets the earthquake vibration level and arrival time from the center communication unit that receives the earthquake early warning, etc., and the information such as the earthquake early warning received by the center communication unit. A seismometer that predicts a seismic level higher than the seismic level, and a data center having a center processing unit that transmits the arrival time to the seismometer, a communication unit that receives emergency earthquake warnings, and seismic data A processing unit having temporary storage means for repeatedly storing a predetermined time, a data recording device for recording vibration data, and a trigger processing device for determining whether the data recording device records vibration data from information received by the communication unit And the processing unit of the vibration data recording device predicts the data center, and the communication If it is earlier than when the arrival time of reception has run a forecast, characterized in that to record the seismic data in the data recording device from the temporary storage means back to arrival time predicted.

  In addition, the processing unit records the vibration data in the data recording device from the time when the prediction is executed when the predicted vibration level of the earthquake is a predetermined value or more and the predicted arrival time is after the time when the prediction is executed. It is characterized by making it.

  Furthermore, the earthquake data recording method of the present invention provides a method for predicting the arrival time when the earthquake vibration level predicted from information such as emergency earthquake warning is equal to or higher than a predetermined value and the predicted arrival time is earlier than when the prediction is executed. It is characterized by recording vibration data retroactively.

  Such a seismic data recording device, seismic data recording system, and seismic data recording method allow the seismometer to start recording seismic motion before reaching the seismic motion. Thereby, although it is a trigger recording method, it is possible to record without missing the beginning of shaking.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a main configuration of the seismometer according to the first embodiment of the present invention. In the figure, 1 is a seismometer, 2 is a communication unit, 3 is a measurement unit, 31 is a sensor, 32 is an A / D converter, 4 is a processing unit, 41 is a trigger processing device, and 42 is a ring buffer as temporary storage means. , 43 is a data recording device, 5 is a clock unit, 6 is a power supply unit, and 7 is a GPS antenna.

  The seismometer 1 includes a communication unit 2, a measurement unit 3, a processing unit 4, a clock unit 5, a power supply unit 6, and the like. The communication unit 2 receives an emergency earthquake bulletin from the Japan Meteorological Agency or information obtained by processing the earthquake (hereinafter referred to as an emergency earthquake bulletin) and outputs it to the processing unit 4 and transmits the earthquake data to the outside. The measurement unit 3 includes a sensor 31, an A / D converter 32, and the like, and outputs a signal obtained by processing the acceleration measured by the sensor 31 by the A / D converter 32 to the processing unit 4. The processing unit 4 includes a trigger processing device 41, a ring buffer 42, a data recording device 43, and the like, and records earthquake data by processing input signals from the communication unit 2 and the measurement unit 3. The trigger processing device 41 determines whether the vibration is a predetermined level or higher from the information input from the communication unit 2 or the measurement unit 3, and the ring buffer 42 continuously stores temporary storage for a certain period of time. The data recording device 43 is a device that records data on the ring buffer 42 that needs to be recorded as a result of the determination by the trigger processing device 41. The clock unit 5 acquires accurate time from the GPS antenna 7 or the like, and the power source unit 6 acquires the power source of the seismometer 1.

  In the embodiment shown in FIG. 1, the seismometer in which the communication unit 2, the measurement unit 3, the processing unit 4, and the like are integrated is shown, but as a modification of the embodiment shown in FIG. 1, as shown in FIG. 2. The communication unit 2 or the measurement unit 3 may be made independent and may be used as the communication device 20 or the measurement device 30.

  The operation of the seismometer 1 having such a configuration will be described. FIG. 3 is a diagram showing a flowchart of the data recording method of the seismometer 1. First, in ST1, the seismometer 1 is set in a standby state where it can receive an emergency earthquake warning (ST1). Next, in ST2, it is determined whether an earthquake early warning or the like has been received (ST2). When the emergency earthquake bulletin is not received, the process returns to the standby state of ST1.

  When receiving an earthquake early warning or the like, in ST3, the vibration level is predicted (ST3). The seismic level prediction method is based on the existing distance attenuation formula based on the information on the latitude, longitude, depth, magnitude, etc. of the epicenter in the earthquake early warning data and the information on the latitude and longitude of the location where the seismometer 1 is installed. (See Non-Patent Document 1) and apply a method of calculating the vibration level.

  Next, in ST4, the trigger processing device 41 of the processing unit 4 determines whether the vibration level obtained in ST3 is equal to or higher than a predetermined value (ST4). When the vibration level is equal to or higher than the predetermined value, the arrival time is predicted in ST5-1 (ST5-1). The arrival time prediction method is based on past methods (non-patent literature) based on the information on the latitude, longitude, depth, etc. of the epicenter in the data such as the earthquake early warning and the information on the latitude, longitude of the place where the seismometer 1 is installed. 2), the propagation time of the P wave is calculated, and the arrival time is calculated. If the vibration level is not equal to or higher than the predetermined value, the vibration data is not recorded by the data recording device 41 of the seismometer 1 in ST5-2, and the monitoring state is set to buffer by the ring buffer 42 (ST5-2).

  Next, in ST6, using the arrival time predicted in ST5-1, it is determined whether or not the predicted arrival time−the time when the prediction is performed = Tm <0 is satisfied (ST6). Prediction arrival time−time when prediction is performed = Tm <0, In ST7-1, the trigger processing device 41 records the vibration data in the data recording device 43 from the vibration data traced back by time Tm as shown in FIG. The retroactive recording state is set (ST7-1). Prediction arrival time−time when prediction is performed = Tm <0 is not satisfied, ST7-2 sets the normal recording state in which the vibration data is recorded in the data recording device 43 (ST7-2).

  In this way, the seismometer 1 can start recording the vibration before reaching the ground motion. Thereby, although it is a trigger recording method, it is possible to record without missing the beginning of shaking.

  Next, a second embodiment will be described. FIG. 5 is a diagram showing a vibration data recording system of the second embodiment. In the figure, 100 is a vibration data recording system, 101 is a data center, 102 is a center communication unit, and 103 is a center processing unit. As for the seismometer 1, the same one as in the first embodiment is used.

  The operation of the vibration data recording system 100 having such a configuration will be described. FIG. 6 is a diagram showing a flowchart of the data recording method of the vibration data recording system 100. First, in ST11, the seismometer 1 is set in a standby state in which an emergency earthquake warning can be received (ST11). Next, in ST12, it is determined whether an emergency earthquake warning has been received (ST12). When the emergency earthquake bulletin is not received, the process returns to the standby state of ST11.

  If an emergency earthquake bulletin or the like has been received, the vibration level is predicted in ST13 (ST13). The seismic level prediction method is based on the existing distance attenuation formula based on the information on the latitude, longitude, depth, magnitude, etc. of the epicenter in the earthquake early warning data and the information on the latitude and longitude of the location where the seismometer 1 is installed. (See Non-Patent Document 1) and apply a method of calculating the vibration level.

  Next, in ST14, the trigger processing device 41 of the processing unit 4 determines whether the vibration level obtained in ST3 is equal to or higher than a predetermined value (ST14). When the vibration level is equal to or higher than the predetermined value, communication connection is established with the data center 101 in ST15-1. (ST15-1). If the vibration level is not equal to or higher than the predetermined value, the vibration data is not recorded by the data recording device 41 of the seismometer 1 in ST5-2, and a monitoring state in which the buffering is performed by the ring buffer 42 is set (ST15-2).

  Next, at step 16, the arrival time is predicted (ST16). The arrival time prediction method is based on past methods (non-patent literature) based on the information on the latitude, longitude, depth, etc. of the epicenter in the data such as the earthquake early warning and the information on the latitude, longitude of the place where the seismometer 1 is installed. 2), the propagation time of the P wave is calculated, and the arrival time is calculated.

  Next, in ST17, using the arrival time predicted in ST16, it is determined whether or not the predicted arrival time−the time when the prediction is performed = Tm <0 is satisfied (ST17). When the predicted arrival time-the time when the prediction is performed = Tm <0 is satisfied, in ST18-1, the trigger processing device 41 records the vibration data in the data recording device 43 from the vibration data traced back by the time Tm as shown in FIG. At the same time, the communication connection is established, and the retroactive recording / transmission state is established in which the vibration data that is back by time Tm is transmitted to the data center (ST18-1). Estimated arrival time-Time when prediction is performed = Tm <0 is not satisfied. In ST18-2, the vibration data is recorded in the data recording device 43, and the communication connection is established, and the vibration data is transmitted to the data center. Recording / transmission state (ST18-2).

  FIG. 7 is a schematic diagram showing a communication connection between the seismometer 1 and the data center 101 of the second embodiment. In the present embodiment, when earthquake vibration having a predetermined amplitude or more is predicted by the earthquake early warning, the seismometer 1 determines whether or not communication connection is possible, establishes a communication connection from the seismometer 1 to the data center 101, and shakes. Data is transmitted.

  In this manner, before the ground motion reaches the seismometer 1, a communication connection between the seismometer 1 and an external device such as the data center 101 or another seismometer can be established. As a result, it is possible to transmit the vibration data in real time without missing the beginning of shaking, although it is a trigger transmission method.

  Next, a third embodiment will be described. The seismic data recording system of the third embodiment has the same structure as that of the second embodiment shown in FIG. 5, but the communication connection method between the seismometer and the data center is changed.

  FIG. 8 is a diagram showing a flowchart of the data recording method of the vibration data recording system 100. First, in ST21, the center communication unit 102 of the data center 101 receives an earthquake early warning or the like (ST21). Next, in ST22, the center processing unit 103 performs prediction of the vibration level (ST22). First, the location of the seismometer 1 is extracted from the area name and predicted seismic intensity information in the Earthquake Early Warning etc., and the latitude and longitude information of the location of the seismometer 1. Next, the predicted seismic intensity of the seismometer 1 is extracted from the information such as the latitude, longitude, depth, and magnitude of the epicenter in the data such as the earthquake early warning and the latitude and longitude of the location where the seismometer 1 is installed. From the information, a calculation method or the like is applied using a past distance attenuation formula (see Non-Patent Document 1).

  Next, in ST23, the center communication unit 102 establishes communication connection with the seismometer 1 extracted in ST22. Next, in ST24, the arrival time is predicted (ST24). The method of predicting the arrival time is based on the existing method based on the information on the latitude, longitude, depth, etc. of the epicenter in the data such as the earthquake early warning and the information on the latitude and longitude of the location of the seismometer 1 extracted in ST22. (See Non-Patent Document 2), a method of calculating the propagation time of the P wave and calculating the arrival time is applied.

  Next, in ST25, the extracted seismometer 1 receives an emergency earthquake bulletin (ST25). Next, in ST26, using the arrival time predicted in ST24, the trigger processing device 41 of the seismometer 1 determines whether or not the predicted arrival time−the time when the prediction is performed = Tm <0 is satisfied (ST26). Prediction arrival time−time at which prediction is performed = Tm <0, In ST27-1, the trigger processing device 41 records the vibration data from the vibration data back by time Tm as shown in FIG. Then, the retroactive recording / transmission state is established in which the vibration data that has traveled for the time Tm is transmitted to the data center (ST27-1). Prediction arrival time-time when prediction is performed = Tm <0 is not satisfied, ST27-2 records the vibration data in the data recording device 43 and sets the normal recording / transmission state to transmit the vibration data to the data center. (ST27-2).

  FIG. 9 is a schematic diagram illustrating a communication connection between the seismometer 1 and the data center 101 according to the third embodiment. In the present embodiment, when an earthquake with a predetermined amplitude or more is predicted by the earthquake early warning, it is determined which seismometer 1 the data center 101 should communicate with, and communication connection from the data center 101 to the seismometer 1 is established. The seismic data is transmitted.

  In this manner, before the ground motion reaches the seismometer 1, a communication connection between the seismometer 1 and an external device such as the data center 101 or another seismometer can be established. As a result, it is possible to transmit the vibration data in real time without missing the beginning of shaking, although it is a trigger transmission method.

It is a figure which shows the seismometer of 1st Embodiment. FIG. 6 is a block diagram of a modification of the embodiment of FIG. It is a flowchart figure of the data recording system of the seismometer of 1st Embodiment. It is a schematic diagram of the data recording system of a seismometer. It is a figure which shows the seismometer of 2nd Embodiment. It is a flowchart figure of the data recording system of the seismometer of 2nd Embodiment. It is a figure which shows the communication connection method between the seismometer and data center of 2nd Embodiment. It is a flowchart figure of the data recording system of the seismometer of 3rd Embodiment. It is a figure which shows the communication connection method between the seismometer and data center of 2nd Embodiment. It is a figure which shows a trigger recording system. It is a figure which shows the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Seismograph, 2 ... Communication part, 3 ... Measuring part, 31 ... Sensor, 32 ... A / D converter, 4 ... Processing part, 41 ... Trigger processing apparatus, 42 ... Ring buffer, 43 ... Data recording apparatus, 5 ... Clock part, 6 ... Power supply part, 7 ... GPS antenna, 100 ... Vibration data recording system, 101 ... Data center, 102 ... Center communication part, 103 ... Center processing part

Claims (5)

  A communication unit that receives an earthquake early warning, a temporary storage unit that repeatedly stores vibration data for a certain period of time, a data recording device that records vibration data, and a data recording device that receives vibration from the information received by the communication unit. A processing unit having a trigger processing device for determining whether to record data, and the processing unit predicts an earthquake vibration level and arrival time from information such as the earthquake early warning received by the communication unit, and predicts If the seismic level of the earthquake is greater than or equal to a predetermined value and the predicted arrival time is earlier than when the prediction was executed, the data recording device can record the vibration data from the temporary storage means back to the predicted arrival time. Characteristic vibration data recording device.   The processing unit causes the data recording device to record the vibration data from when the prediction is executed when the predicted vibration level of the earthquake is a predetermined value or more and the predicted arrival time is later than when the prediction is executed. The vibration data recording apparatus according to claim 1, wherein:   A center communication unit that receives earthquake early warnings, etc., and a seismometer that predicts the earthquake vibration level and arrival time from information such as the earthquake early warnings received by the center communication unit, and predicts an earthquake level higher than the set level A data center having a center processing unit that extracts an arrival time to the seismometer, a communication unit that receives an emergency earthquake bulletin, etc., temporary storage means for repeatedly storing seismic data at regular intervals, A data recording device for recording data, and a processing unit having a trigger processing device for determining whether to record vibration data in the data recording device from the information received by the communication unit, The processing unit of the vibration data recording apparatus predicts the data center, and the arrival time received by the communication unit executes the prediction. Cases, seismic data recording system, characterized in that to record the seismic data in the data recording device from the temporary storage means back to arrival time predicted.   The processing unit causes the data recording device to record the vibration data from when the prediction is executed when the predicted vibration level of the earthquake is a predetermined value or more and the predicted arrival time is later than when the prediction is executed. The vibration data recording system according to claim 3, wherein:   If the earthquake vibration level predicted from information such as earthquake early warning is greater than or equal to a predetermined value and the predicted arrival time is earlier than when the prediction was executed, the vibration data is recorded retroactively to the predicted arrival time. How to record vibration data.

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