JPH11264875A - Data acquisition and recording device for seismometer network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make quickly collectible data from a seismometer and facilitate analysis of an earthquake by the collected data. SOLUTION: DSP 10 processing data for observation data from a seismometer 1 and CPU 11 performing communication control to a server 30 are connected via DPRAM 12 so as to process in parallel and collect data from the seismometer 1 even during communication. Data acquisition from the earthquake 1 is made quickly to be done and analysis of an earthquake with the collected data is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismometer network data recording device used in a seismometer network for installing a large number of seismometers and collecting observation data.

[0002]

2. Description of the Related Art As a method of collecting observation data from a seismograph 1 installed in a remote place, there is a telemeter system shown in FIG.

In this method, the measurement result of the seismometer 1 installed at a far distant measurement point is converted into an electric signal and transmitted to a center by wire or wireless to collect data. For example, as shown in FIG. 11, a recording device 2 having an A / D converter and a microcomputer is provided in each seismometer 1 installed at a measurement point, and the observation data is converted into digital data having a fixed word length. On the other hand, a computer 4 for data collection is prepared on the center side, and the computer 4 and the recording device 2 are connected via a modem 5 via a telephone line.

At this time, as a method of collecting data from each seismometer 1, conventionally, a different device number is assigned to each seismometer 1, and each seismometer 1 is individually called from the center side using the number and the data is collected. A polling method for exchanging data, a cyclic method for exchanging data by periodically calling the seismometer 1, or a parallel method for exchanging data using a plurality of lines have been used.

In recent years, it has been proposed to arrange the seismometers 1 at high density over a wide area, collect data as soon as possible as soon as the earthquake occurs, calculate the strength and scale of the earthquake, and quickly grasp the damage. Have been.

[0006]

However, in the above-mentioned polling method and cyclic method, since the computer on the center side individually calls the recording devices and takes the recorded data in order, it takes time to collect.

On the other hand, in the parallel system, all the recording devices are all independently connected to the computer at the center, so that data can be collected at high speed. On the other hand, since a dedicated line is used, the cost is high. Furthermore, when an earthquake occurs, a large amount of data from each seismograph is concentrated on the computer of the center at a time, so that processing may be slow and data collection may take time.

Therefore, unless the data collected in this way is processed to calculate the magnitude and magnitude of the earthquake,
Since the outline cannot be grasped, the conventional data collection method has a problem that it takes time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a data recording device for a seismograph network which can collect data quickly and can easily analyze the collected data.

[0010]

In order to solve the above-mentioned problems, the present invention comprises a measurement value calculation means and a communication control means connected via a memory so that processing can be performed in parallel. Means connected to the seismograph AD
A converter for performing predetermined data processing for evaluating an observation signal from the seismometer converted by the A / D converter; and a buffer for temporarily storing data from the arithmetic unit in the communication control unit. A configuration including a memory means, an interface for connecting data stored in the buffer memory means to a predetermined connection destination according to a communication protocol via a telephone line, and a dialer is adopted.

By employing such a configuration, the measured value calculating means and the communication control means can transfer necessary data via the memory means. Therefore, independent processing can be performed in parallel. As described above, by performing the measurement value calculation means and the communication control means in parallel processing, data can be collected from the seismograph by the measurement value calculation means while the communication control means is communicating.

That is, the measurement value calculation means can convert the observation signal input from the seismograph into digital data by the A / D converter and perform predetermined data processing in place of the connected computer.

On the other hand, the communication control means is connected to a predetermined connection destination by a dialer, and transmits the observation data processed by the measurement value calculation means via a telephone line. At this time, by temporarily storing and transmitting the data from the measurement value calculating means to the buffer memory means, the data can be transmitted according to the traffic of the line.

[0014] At this time, instead of the interface and dialer for connection via the above-mentioned telephone line, a configuration having a router for connection to a LAN is adopted, so that the router can be connected to the LAN. Can be.

When an earthquake is detected by the seismometer, the measurement operation means performs predetermined data processing for evaluation on the observed signal, and the result is used as early information by the communication control means. It is possible to adopt a configuration of transmitting to a connection destination.

By adopting such a configuration, the measurement and calculation means performs predetermined data processing by limiting the data accumulation time for the observed signal. Calculated data that can grasp the strength and scale of the data can be transmitted quickly to help grasp the outline.

Further, by adopting a configuration including a batch erasable non-volatile memory for storing a set value for causing the measurement calculation means to perform evaluation data processing, the non-volatile memory, for example, the By updating or rewriting the set values, it is possible to easily change the evaluation, improve the observation accuracy, and improve the functions.

Further, by adopting a configuration provided with a PC card slot, a removable medium capable of storing setting values and processing programs of a flash card, a flash disk card, a hard disk card, and the like using the PC card slot is provided. Since it can be used, setting values and processing programs can be easily changed or added only by replacing the PC card. Also, for example, if a network card or a modem card is used as the PC card, connection to a LAN or a telephone line can be easily performed.

Further, by adopting a configuration having a GPS receiver, an accurate time can be obtained by using a GPS satellite, so that the observation accuracy can be improved.

Further, by employing a configuration provided with a calibration signal generator and a self-diagnosis function, the state of the apparatus can be constantly monitored, so that observation accuracy can be maintained.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a data recording device A for a seismometer network according to the present invention.

As shown in FIG. 1, this data recording device is a digital signal processor (DS) for signal processing.
P) A multiprocessor comprising a measurement value calculation means comprising 10 and a communication control means comprising a microcomputer (CPU) 11, wherein the DSP 10 and the CPU 1
1 is connected via a memory means comprising a dual port ram (DPRAM) 12 so that they can communicate with each other and perform processing in parallel.

The DSP 10 has an A / D converter 13,
EEPROM 14, GPS engine 15, RAM 16,
ROM 17 and calibration signal generator 18 and self-diagnosis circuit 1
9 are provided.

In this embodiment, the A / D converter 13 employs a 22-bit Σ-Δ system, and has three channels input by an analog multiplexer.

Each input channel is provided with an input circuit 20 comprising a buffer amplifier and a low-pass filter circuit. Each input circuit 20 is connected to the X, Y, and Z axis output of the seismometer 1 respectively. N / S input terminal, E /
Connected to W input terminal and U / D input terminal.

In this embodiment, the low-pass filter circuit of the input circuit 20 is provided with two stages of a fourth-order Butterworth filter as a high-order low-pass filter (anti-aliasing filter), and can be cascaded according to the state of the observation signal. The area component is cut so that unnecessary spurious can be prevented. Although not shown, the U / D input is provided with a circuit for canceling the influence of gravity by giving an offset to the input signal, in addition to the fourth-order Butterworth filter.

The EEPROM 14 is capable of electrically writing and erasing data, and in this embodiment, the DSP 1
0 performs batch erase and write. This EEPROM1
4 stores a setting value of an evaluation operation program to be executed by the DSP 10, as described later. For this reason,
Since the set value can be easily changed by the DSP 10, it is possible to cope with a change in the evaluation method.

The GPS engine 15 is for receiving time data from GPS satellites, and outputs 1P from the received signal.
A PS signal is generated so that time accuracy with an error range negligible for use in data analysis can be obtained.

The RAM 16 is composed of a ring buffer for recording observation data and a work buffer.

In the ROM 17, programs such as a boot for cold start and a kernel (handler) are written.

As shown in FIG. 1, the calibration signal generator 18 is connected to the DSP 10 and generates a triangular wave voltage as a reference voltage from the calibration output terminal 21 according to a command from the DSP 10. The calibration output terminal 21 is connected to the calibration input terminal of the seismometer 1 to observe response values from the N / S input terminal, E / W input terminal, and U / D input terminal by the reference voltage. , The calibration is performed.

The self-diagnosis circuit 19, as shown in FIG.
In the case of this embodiment, it is composed of a plurality of comparator circuits connected to the DSP 10. A power supply voltage and a reference voltage of each part such as a sensor, a modem, a main body, etc. are input to each comparator circuit, and when an abnormality of the power supply is detected, the DSP 10, for example, reports the contents of the abnormality to a server using an ISDN line. In addition to the notification to 30, a sequence for abnormal processing such as system reset can be executed.

On the other hand, the CPU 11 has a serial port 2
2, PC card slot 23, ROM 24, RAM 25
And so on.

In this case, the serial port 22
It comprises four ports: a terminal connection port 26, a TA (terminal adapter) port 27, a spare port 28, and an external display port 29.

The terminal connection port 26 is a port for connection with an external computer. When an external computer is connected to this port 26 by a cable, the CPU
11 can be directly accessed.

The TA port 27 is for connection to an ISDN line, and can transmit data at high speed simultaneously with the occurrence of an earthquake by utilizing its high speed.

For example: Communication speed: data transmission speed General subscriber line: 2400 bps to 33,800 bps ISDN line: 64000 bps, and can be transmitted at a speed of about 1.8 to 27 times. Therefore, the time required for communication is 1/2 to 1/27 of that of the general subscriber line.

For example, the amount of data such as maximum acceleration and seismic intensity to be sent when an earthquake occurs is assumed to be 128 bytes to 256 bytes. When transmitting this data, a general subscriber line... 0.1 to 1 second ISDN line ... 0.04 seconds.

In a general subscriber line, the communication speed depends on the quality of the line, but in the ISDN line, communication can always be performed with the same quality.

2. Connection time: From the start of dialing until the other party receives the call. General subscriber line: 10 seconds max. ISDN line: 1 second or less The line disconnection time is 1/2 of the connection time, respectively.
It takes some time. For these reasons, ISD
You can see the effectiveness of N lines.

The spare port 28 is provided, for example, for connection to emergency management radio equipment via satellite communication or a modem in an emergency.

The external display port 29 is RS-485.
For example, an external display such as a display can be connected.

The PC card slot 23 is
(Personal Computer Memory
Card International Assoc
It has two slots, and is connected to the bus of the CPU 11 via an interface. By inserting a flash memory card, flash disk card, hard disk card, or the like into the slot 23, the processing program and other files written on the card can be loaded into the DSP 10 and the CPU 11.

That is, the PC card stores, for example, a set value management file, a DSP program file, an observation data management file, a system history file, an event management file, a dial management file, and the like. Update and change the functions of the entire device.

The ROM 24 stores a BIOS and a communication program for performing communication according to a predetermined protocol. In addition, the ROM 24 also stores a dialer program including a script for performing a connection process.

On the other hand, the RAM 25 is used not only as a working buffer but also as a buffer memory for storing data processed by the DSP 10.

In the DPRAM 12, as shown in FIG. 2, memory locations such as a command area, a status area, a data write area, and an interrupt flag are determined, and data is transmitted and received using the interrupt flag and a command. It has become.

As shown in FIG. 3, the seismometer network data recording apparatus A configured as described above initializes the system by initial processing, generates a task, and performs multitask processing. Has become.

This task is composed of a main task, a DSP task, an ISDN task, a display task, and a system monitoring task. The functions of each task are as follows: (1) Main task display control and PC card slot state management.

DSP task Instructs transmission / reception of data to / from DSP 10 and notification of setting data.

ISDN task The terminal adapter is controlled, and data is transmitted and received on the ISDN line. Regarding transmission and reception of observation data, history management of untransmitted data is performed in this task.

Display task Outputs data to an external display.

System monitoring task Each task is polled to diagnose the system.
When a system error is detected, the system is reset.

Also, it monitors the time of the self-diagnosis request and the time of the activation of the timer for confirming the existence. That is, D
If there is no survival confirmation response from SP10 for more than 2 minutes,
Notify the DSP task that the existence check is to be performed.

Further, the GPS time data is acquired every two minutes via the DPRAM 12 and the system clock of the CPU 11 is corrected. This maintains the accuracy of a clock for performing a timer activation process for automatically starting the data recording process at the set time and performing an automatic inspection at the set time.

The scheduling of each task is performed according to the priorities shown in FIG.

This embodiment is configured as described above. Next, a "system start sequence", a "data recording", a "recording data transmission sequence", and a "set value change sequence" managed by each task. The present invention will be described by describing the “calibration sequence”.

At this time, an antenna is connected to the GPS terminal of the recording device A, and the X, Y, and Z axis outputs of the seismometer are output to the N / S input terminal, the E / W input terminal, and the U / D, respectively. Connect to input terminal. Also, the calibration signal output terminal 27 and the calibration input of the seismometer 1 are connected. Then, the flash card on which the program is written is inserted into the PC card slot 23.

On the other hand, a TA is connected to the TA port 27, and as shown in FIG. 5, it is connected to a connection destination, for example, a server 30 by an ISDN line as shown in FIG. Then, the plurality of recording devices A and the server 30 are connected via an ISDN line to form a seismograph network.

[System Start-Up Sequence] In this sequence, as shown in FIG. 6, the CPU 11 reads the BIOS at the same time as the power is turned on, and initializes the embedded devices such as the PC card slot 23 and the serial port 22. Further, a program is loaded from a flash card inserted into the PC card slot 23, and a task is generated. On the other hand, the DSP 10 also reads the boot of the ROM 17 so that the program request command is
Write to the DSP command area of AM12 and activate the DSP interrupt flag. At this time, the CPU 11
Reads the flag and, if active, reads the command and makes the flag inactive. In this case, since the command is a program transfer instruction, the CPU 11
Writes the program from the flash card inserted into the PC card slot 23 into the CPU data write area of the DPRAM 12, and activates the CPU interrupt flag. Then, when the DSP 10 reads the interrupt flag and is active, the DSP 10 reads the data in the CPU data write area into the RAM. Then, the flag is deactivated. The program is transferred and loaded by repeating such processing.

Since the program is read from the card inserted in the PC card slot 23, a new program can be added or updated only by replacing the card. Therefore, it is possible to respond to changes in the observation method in the future.

When the program is loaded in this way, D
The SP 10 writes the GSP time data and the set value request command in the command area of the DPRAM 12 and, when the set value is transferred from the CPU 11 according to the processing program, responds with the existence confirmation command and completes the startup.

[Data Recording] After activation, the DSP 10 constantly writes the observation data of the seismograph 1 converted by the A / D converter 13 to the ring buffer of the RAM 16 repeatedly. Is calculated.

1. Start When the recording starts, as shown in FIG.
The point in time when the set value exceeds the set value V _H continuously for a sample is defined as start-up. The trigger can be set for each component (channel), and is activated when any component satisfies the condition.

2. Data recording time Data is recorded starting from the second immediately before the start was detected, and starting from the set pre-start time. For example, the pre-startup recording time is set to 30 seconds, and the start-up time is 0 minutes and 45 minutes.
In the case of 296 seconds, data is recorded 30 seconds earlier than 0 minutes 45 seconds, that is, data from 0 minutes 15 seconds (the data in the ring buffer is stored).

On the other hand, the stop of the recording is set to the second immediately after the stop determination is established (when all the data of the trigger-set components do not exceed the stop level V _L during the stop determination time).
For example, when the time when the stop determination is made is 1 minute 42.510 seconds, data up to 1 minute 43 seconds is recorded.

3. Early Information The early information calculation is performed at the following three times.

(1) From 10 seconds before activation, fs = 200H
Assuming that z (sampling rate of the AD converter 13), 8000 samples (40 seconds) are recorded. fs =
At the time of recording 4000 samples (40 seconds) at 100 Hz. "First report." (2) From 10 seconds before starting, if fs = 200 Hz, 1
When 6000 samples (80 seconds) are recorded. fs = 10
At 0 Hz, it is 8000 samples (80 seconds). "Second
Information ”.

(3) When data recording is completed. However, the period is from 10 seconds before activation to the end of data. "Final information"
Called.

Note that the data recording time is fs = 200 Hz
8000 samples (40 seconds), fs = 100H
In the case of z, if the time is less than 4000 samples (40 seconds), the "first report" is omitted and only the "final report" is provided. When the data recording time is fs = 200Hz,
In the case of 16000 samples (80 seconds) and fs = 100 Hz, if less than 8000 samples (80 seconds), the “second report” is omitted.

As described above, the following predetermined data processing is performed on the signal observed within the required time.

That is, in this embodiment, for example, the seismic intensity calculation, the dominant frequency, and the wave energy are calculated by the program read from the flash card by the FFT calculation and transmitted.

(1) Seismic Intensity Calculation Within the target time for early information calculation, 1
0 second is defined as one section, and the early information calculation time is defined as one earthquake.
Therefore, in the first report of the early information, the calculation of the seismic intensity of the four sections is performed. The seismic intensity recorded as early information or the displayed seismic intensity is the maximum value in the section. A certain section (12
Second) digital data (2400 pieces: fs = 200H)
cosine taper processing is performed on the data (200 pieces, 100 pieces each) at both ends of both ends of z, 1200 pieces: fs = 100 Hz).

It should be noted that the data section is in units of 10 seconds at the center, and each second overlaps at both ends. 848 (424) zero data (offset values) are added to both ends of this data, for a total of 4096 data.

(2) Dominant frequency A moving average is obtained from the spectrum decomposed by the FFT in a frequency width of 0.1 Hz within the early information calculation target time, and the spectrum is smoothed.

1. For example, in the early information “first report”, data for 40 seconds of 10 seconds before activation and 30 seconds after activation (8000 samples: fs = 200 Hz, 4000: fs = 100H)
Zero data (offset value) is added to each of 96 before and after z), and FFT is performed at 8192 points. 0.1Hz-30H
In the range up to z, the frequencies from the first to third maximum values and their power values are calculated.

2. In the "second report", data for 80 seconds from 10 seconds before activation to 70 seconds after activation (16000 samples)
And 192 zero data (offset values) before and after are added, and FFT is performed at 16384 points. The spectrum is 0.
8192 steps are obtained from 0122 Hz to 100 Hz. Maximum value 1 in the range of 0.05 Hz to 30 Hz
The frequencies from the first to third places and their power values are calculated.

3. "Final report" 10 seconds before the start and up to the end of the data, as well as "First report" and "Second report", the frequencies from the first to the third largest values included in the spectrum value by FFT and their power values Is calculated.

(3) Wave Energy In the early information "First report", 10 seconds before activation, 3 seconds after activation
The wave energy E is obtained from the spectrum obtained by the FFT from the data for 40 seconds of 0 second based on the equation (1).

2. In the “second report”, the wave energy E is obtained from the spectrum obtained by FFT from the data from 10 seconds before the start to 70 seconds after the start based on the equation (1).

3. "Final report" The wave energy E is calculated from the spectrum obtained by FFT until the end of the data by adding 10 seconds before the start based on the equation (1).

[0083] Where: f _max = ω / 2π = 30 HZ f _min = ω / 2π = 0.1 HZ For the data thus observed, processed data subjected to predetermined data processing for evaluation is sent. The amount of data can be compressed rather than transmitting observation data as it is. Furthermore, since the data processed in this way evaluates the magnitude and energy of the earthquake, the server 30 can immediately evaluate the earthquake using the calculated data.

In this embodiment, the seismic intensity calculation, the dominant frequency, and the wave energy have been described as evaluation operations.
It is not limited to this. Since various evaluation formulas can be used by changing the program stored in the flash card, it is possible to cope with future changes in the evaluation method.

[Sending Sequence of Recorded Data] When the calculation of the early information is completed as described above, the DSP 10 writes the data in the data writing area of the DPRAM 12, and the written data is transmitted to the server 30 by the CPU 11. That is, after writing data in the data write area, the DSP 10 writes a transfer request in the CPU command area of the DPRAM 12 and activates the DSP interrupt flag. Then, the CPU 11 reads the flag, and reads the command because it is active. In this case, since the command is a transmission request, the data written in the data write area is stored in the RAM 25 as a file, and the flag is made inactive. By repeating such a process, a transmission data file is generated.

Thus, when the transmission file is generated,
The CPU 11 activates a dialer and executes a line connection process. That is, connection processing with the server 30 is performed by a script set in advance. In this process, when the number of retries exceeds the number of retries, the telephone number of the server 30 to be transmitted is sequentially acquired from the dial management file of the flash card, and the connection process is performed.
Also, at this time, if the numbers are in order, after a predetermined interval, the processing is repeated from the beginning of the telephone number until the connection is established. Then, when the connection with the server 30 is established, as shown in FIG.
Point-to-Point Protocol (PPP) for high-speed transmission using the TA asynchronous / synchronous conversion function
ol), and then upload the data using a dedicated communication method.

[Setting Value Changing Sequence] In this sequence, the setting values of the DSP 10 and the CPU 11 are changed, added, and deleted from the server 30 using the ISDN line.

For example, when changing the set value of the DSP 10, the server 30 connects the line as shown in FIG.
The change file is downloaded to the CPU 11.
That is, when receiving the setting value transfer command from the server 30, the CPU 11 sequentially stores the received change file (binary) in the RAM 25. When the reception is completed, the line is disconnected. On the other hand, the received modified file performs a checksum to confirm whether the file was successfully received. If it cannot be confirmed, reconnect and request retransmission of the file.

On the other hand, if it can be confirmed, the CPU 11 writes the changed file into the data write area of the DPRAM 12 and converts the set value into the executable file and rewrites the set value of the operating DSP 10. Write to area. Then, the flag is activated. Then, the DSP 10 reads the flag, and reads the command because the read flag is active. At this time, the read command is a setting value change request, so the file is read from the data write area and the flag is made inactive. After checking the read file, the EEPROM 14 is rewritten. When rewriting is completed, the change end command is
Activate the write flag in the CPU command area of AM12.

Similarly, the set value of the CPU 11 can be changed. That is, when receiving the CPU setting value change command from the server 30, the CPU 11 sequentially stores the change file in the RAM 25, and disconnects the line when the reception is completed. Also, the received file performs a checksum, and when it is verified that the reception has been normally performed, the file is converted into an executable file, and the setting value change file of the flash card is rewritten.

As described above, setting values can be changed, added, deleted, etc., so that observation accuracy can be improved and functions can be improved by changing or adding evaluations in the future. In addition, since the change can be made using the communication line, a large number of recording devices can be changed quickly, at low cost, and easily. Therefore, it is most suitable as a recording device for seismometer networks.

[Calibration Sequence] This sequence is for calibrating the seismograph 1 and, as shown in FIG.
U11 outputs a calibration request signal to the DSP 10 at a predetermined cycle. That is, the CPU 11 writes the calibration request command in the CPU command area of the DPRAM 12, and activates the flag. On the other hand, the DSP 10 accepts the calibration request command only when it is not running, that is, when the observed value does not exceed the starting point. Then, the flag is turned on and a command signal is output to the calibration signal generator 18 in order to notify that the calibration request command has been received. Upon receiving this, the calibration signal generator 18 outputs a triangular wave voltage as a reference voltage from the calibration output terminal 21 and inputs it to the calibration input terminal of the seismometer 1.

At this time, since the seismometer 1 to which the reference voltage has been input outputs the same output as when the seismic wave is observed, the data is read by the above-mentioned "data recording" sequence. During this time, the DSP 10 sets the flag to active to notify that the CPU 11I is being calibrated. Anomalies can be detected by calculating early data such as seismic intensity calculation, dominant frequency, and wave energy, and comparing the calculated value with a preset value.
When an abnormality is detected in this manner, the server 30 can be notified of the abnormality, for example.

In the above embodiment, the serial port 22 is provided and the server 3 is connected via a telephone line (ISDN).
Although the connection to 0 has been described, the invention is not limited to this. 1 in place of the serial port 22
It is obvious that by installing the router 31 and introducing network software as shown in FIG.

In the above embodiment, the DSP 10 and the CPU
11 is connected via a memory means comprising the DPRAM 12, but is not limited to this. For example, communication may be performed by I / O means using a simple memory.

Further, in the above embodiment, the ISD
Although the use of the N line has been described, a modem can be used as an interface for connection via a telephone line. In particular, high-speed modems (33.6-56
If kbps) is used, the performance is slightly reduced, but the network can be easily configured.

[0097]

As described above, according to the present invention, in a seismograph network in which seismometers are arranged at high density over a wide area, data is quickly collected from the seismographs simultaneously with the occurrence of an earthquake. It is possible to provide a data recording device for a seismometer network that can easily perform the analysis processing of the obtained data.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment.

FIG. 2 is a block diagram of an embodiment.

FIG. 3 is a schematic diagram showing tasks of the embodiment.

FIG. 4 is a schematic diagram illustrating task priorities according to the embodiment;

FIG. 5 is a schematic diagram showing a use mode of the embodiment.

FIG. 6 is a flowchart of the embodiment.

FIG. 7 is a diagram illustrating the operation of the embodiment.

FIG. 8 is a flowchart of the embodiment.

FIG. 9 is a flowchart of the embodiment.

FIG. 10 is a flowchart of the embodiment.

FIG. 11 is a diagram illustrating the operation of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismograph 10 DSP 11 CPU 12 DPRAM 13 A / D converter 14 EEPROM 15 GPS engine 16 RAM 17 ROM 18 Calibration signal generator 22 Serial port 23 PC card slot 24 ROM 25 RAM 26 Terminal 27 Terminal for TA 30 Server 31 Router A Data recording device

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[Procedure amendment]

[Submission date] March 23, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

In order to solve the above-mentioned problems, the present invention comprises a measurement value calculation means and a communication control means which are connected via a memory means so as to be able to perform processing in parallel. A connected to the seismometer
And a predetermined data process for evaluating an observation signal from the seismometer converted by the A / D converter, and the communication control unit temporarily stores data from the calculation unit. Buffer memory means, an interface and a dialer for connecting data stored in the buffer memory means to a predetermined connection destination via a telephone line according to a communication protocol, and a GPS receiver for receiving time data. That is why the configuration was adopted.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

Namely, measurement and calculation means, the observation signals input from seismometer into digital data by the A-D converter, it is possible to perform predetermined data processing. this
At this time, the predetermined data processing
Observation using accurate time obtained from time data from PS satellite
The aim is to improve measurement accuracy, for example, in networks
Ignore the data analysis use of each recording device provided in
Time accuracy is obtained.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Deleted

Claims (8)

[Claims] 1. A measurement value calculation means and a communication control means connected via a memory means so that processing can be performed in parallel with each other, wherein the measurement calculation means includes an A / D converter connected to a seismograph. And a predetermined data process for evaluating an observation signal from the seismograph converted by the A / D converter. The communication control unit includes a buffer memory unit for temporarily storing data from the arithmetic unit. An interface and a dialer for connecting the data stored in the buffer memory means to a predetermined connection destination according to a communication protocol via a telephone line, and a dialer. 2. A system according to claim 1, further comprising a router for connecting to a LAN, in place of the interface and dialer for connection via the telephone line.
Data recording device for seismograph network described in. 3. When an earthquake is detected by the seismometer, the measurement calculation means performs predetermined data processing for evaluation on a signal observed within a required time, and transmits the result to the communication control means. The data recording device for a seismograph network according to claim 1 or 2, wherein the data is transmitted to the connection destination as early information. 4. A batch erasable non-volatile memory for storing a set value for causing said measurement calculation means to perform data processing for evaluation is provided. Data recording device for seismograph network described in. 5. The data recording device for a seismograph network according to claim 1, further comprising a PC card slot. 6. The data recording device for a seismograph network according to claim 1, further comprising a GPS receiving device. 7. The data recording device for a seismograph network according to claim 1, further comprising a calibration signal generator. 8. The data recording device for a seismograph network according to claim 1, further comprising a self-diagnosis function.