JPH10142348A - Earthquake observation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain accurate seismic information by correcting seismic information at a central control center using temperature data from a strong motion seismograph. SOLUTION: Temperature at an installing point of a strong motion seismograph 10 measured by a thermometer for measuring the ambient temperature is inputted to a data processing section and stored therein along with a seismic data. At the same time, the seismic data (b) and the temperature data (a) at the time of occurrence of earthquake are transmitted on a telephone line 7 from the data processing section of the strong motion seismograph 10 through an exchanger 20 to the host computer 21 in a central data control center upon request therefrom. The temperature data (a) and the seismic data (b) are processed at the operating section 22 of the host computer 21. More specifically, an operation for correcting the sensitivity of a ground sensor built in the seismograph 10 depending on the temperature variation, and an operation for correcting the seismic data based on the corrected value are performed at the operating section 22. According to the arrangement, an accurate seismic data can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake observation system using a strong seismograph, and more particularly to a data central control center which corrects a change in sensitivity of a ground sensor due to a change in temperature at an observation point. Related to the earthquake observation system.

[0002]

2. Description of the Related Art Conventionally, a seismometer called a strong seismograph has been used mainly for the purpose of obtaining a seismic response record of a structure ground during a strong earthquake. This strong motion sensor is activated when an earthquake larger than a predetermined magnitude is detected, and a servo type accelerometer is used as the sensor.

FIG. 3 shows a conventional strong motion seismometer 10a. The strong motion seismometer 10a includes a ground sensor 1 having three built-in servo accelerometers for detecting vibrations in three directions of X, Y and Z. And a data processing unit 2 for receiving a digital earthquake signal transmitted from the ground sensor 1. Data processing unit 2
Has a data recording unit and a data transmission unit, and has a built-in microcomputer 9 for controlling the internal operation of the strong motion seismograph. In the data processing unit 2, the absolute time is recorded by the clock 4 calibrated by the automatic calibrating device based on the time signal of the radio 3, and the seismic waveform is stored in the IC card 5 so that it can be easily analyzed by a computer in post-processing. Is available. Reference numeral 3a indicates an antenna.

Further, the earthquake data recorded in the data recording unit of the data processing unit 2 and the earthquake data recorded in the IC card are transmitted by a telephone line 7 to a data central management center in a remote place remote from the installation point of the strong seismograph. Host computer
21 (see FIG. 1).

[0005] An uninterruptible power supply 12 is provided to operate the strong seismograph 10 as described above. Reference numeral 19 denotes a personal computer connected when the microcomputer 9 changes the program. A number of strong motion seismographs are scattered throughout the country, and the data of each strong motion seismograph is collected at the centralized data management center.

[0006]

By the way, the sensitivity S of the ground sensor changes depending on the temperature as shown in FIG. Therefore, in order to perform accurate vibration measurement, it is necessary to correct the sensitivity of the ground sensor according to the temperature at the observation point. The present invention incorporates a thermometer into a strong seismograph and transmits the temperature information of the observation point in addition to the seismic data in real time via a communication line, so that on the receiving side, the vibration measurement value (earthquake data) obtained by the ground sensor is obtained. An object of the present invention is to provide an earthquake observation system in which corrected temperature data is obtained by temperature correction.

[0007] The sensitivity S of the ground sensor is expressed by the following equation.

S = v / G where v: output voltage of servo accelerometer G: acceleration of earthquake (gal)

[0008]

According to the present invention, there is provided an earthquake observation system comprising a strong seismograph and a data central management center capable of receiving seismic data detected by the strong seismograph via a communication line. The strong motion sensor comprises a ground sensor, a data processing unit capable of receiving seismic data from the ground sensor, and a microcomputer built in the data processing unit and controlling the operation of the strong motion sensor, Connect the communication line to the microcomputer,
Further, a thermometer capable of measuring the ambient temperature at the installation site of the strong motion sensor is provided, and temperature data detected by the thermometer is configured to be input to the microcomputer as a means for solving the problem.

A host computer is provided in the data central control center, and an arithmetic unit of the host computer performs an arithmetic operation for correcting the earthquake data based on the temperature data transmitted from the strong motion seismograph. Means.

[0010] In the earthquake observation system of the present invention, the seismic wave (earthquake data) and the temperature at that time recorded in the data processing unit of the strong seismograph are recorded. Can be monitored. Further, the temperature of the sensitivity of the ground sensor can be corrected by the host computer of the data central control center, whereby accurate earthquake data can be obtained.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an earthquake observation system according to an embodiment of the present invention. FIG. 1 is a system diagram of the system, and FIG. The same reference numerals as in FIG. 3 in FIGS. 1 and 2 denote substantially the same members.

The strong motion seismograph 10 used in the system of this embodiment has substantially the same configuration as the strong motion seismometer 10a shown in FIG. A total of 13 are provided. The temperature measured by the thermometer 13 (atmosphere temperature data) is input to the data processing unit 2, and the temperature at that time (as a digital quantity) is recorded together with the earthquake data.

At the same time, or by a call from the data central control center, the data processing unit 2 of the strong seismograph 10
From the telephone line 7, the seismic data (including time) a and the temperature data b at the time of the occurrence of the earthquake are transmitted to the host computer 21 of the data central control center via the exchange 20.

Then, the temperature data a and the earthquake data b are processed by the arithmetic unit 22 of the host computer 21. That is, the calculation unit 22 performs a calculation for correcting the sensitivity of the ground sensor built in the strong motion seismometer 10 in accordance with the temperature change, and a calculation for correcting the earthquake data based on the correction value.
Then, the corrected earthquake data is output as corrected earthquake data c and recorded in the recording unit 23.

As described above, according to the earthquake observation system of this embodiment, the temperature of the sensitivity of the ground sensor is corrected, whereby accurate earthquake data can be obtained.
In addition, in the data central control center, seismic data and temperature data at the strong motion seismograph installation points can be monitored in real time through a telephone line, and the effectiveness of the seismic observation system can be improved.

[0016]

As described above, according to the earthquake observation system of the present invention, the following effects and advantages can be obtained. (1) The temperature at that time is also recorded in the recorded seismic wave (earthquake data), and the temperature of the observation point as well as the earthquake data can be monitored in real time through a communication line. (2) Temperature compensation of the sensitivity of the ground sensor can be performed,
Thereby, accurate earthquake data can be obtained.

[Brief description of the drawings]

FIG. 1 is a system diagram of an earthquake observation system as one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a strong seismograph used in the system.

FIG. 3 is a schematic configuration diagram of a conventional strong seismograph.

FIG. 4 is a sensitivity-temperature characteristic diagram of a ground sensor.

[Explanation of symbols]

 Reference Signs List 1 Ground sensor 2 Data processing unit 3 Radio 4 Clock 5 IC card 7 Telephone line 10 Strong seismograph 11 Commercial power supply 12 Uninterruptible power supply 13 Thermometer 21 Host computer 22 Operation unit 23 Corrected earthquake data recording unit a Temperature data b Earthquake data c Corrected earthquake data

Claims (2)

[Claims] 1. A seismic observation system formed by a strong seismograph and a data central management center capable of receiving seismic data detected by the strong seismograph via a communication line, wherein the strong seismograph includes a ground sensor, It has a data processing unit that can receive earthquake data from the ground-based sensor, and a microcomputer that is built into the data processing unit and controls the internal operation of the strong motion seismograph, and the communication line is connected to the microcomputer. A thermometer capable of measuring the ambient temperature at the installation location of the strong motion sensor is provided, and the temperature data detected by the thermometer is configured to be input to the microcomputer. Earthquake observation system. 2. A host computer is provided at the data central control center, and an arithmetic unit of the host computer performs an arithmetic operation for correcting the seismic data based on the temperature data transmitted from the strong seismograph. The seismic observation system according to claim 1, wherein: