JP2010271193A - Earthquake detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake detection system which certainly operates and carries out a corresponding performance before an arrival of an S-wave by using a battery driving operation on the occurrence of an earthquake. <P>SOLUTION: The earthquake detection system includes: a quake measuring means for measuring a quake of the earthquake; and a signal processing means for receiving a signal output by the quake measuring means and executing an operation corresponding to the signal. The system is characterized in that the quake measuring means and the signal processing means are driven by a battery. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an earthquake detection system that executes a predetermined countermeasure operation in response to an earthquake occurrence, and in particular, issues an alarm between the detection of a P wave and the arrival of an S wave, and performs appropriate control. The present invention relates to an earthquake detection system for reducing damage caused by an earthquake.

  Conventionally, when an earthquake occurs, the information on the epicenter, the magnitude of the earthquake, the seismic intensity of each place, and the tsunami is broadcast through television and radio broadcasting in order to widely inform the public of the information. However, even when broadcasting through TV and radio in this way, information is provided at the earliest few minutes after the actual earthquake occurs. There is a high possibility that the information will not be utilized.

  On the other hand, in a disaster prevention system that generates alarms, etc., by measuring the occurrence of fires and gas leaks, etc., a seismic sensor is installed in the receiver and detector, and when an earthquake occurs, each sensor is detected by a signal from the seismic sensor. A device that increases the sensitivity of a vessel is known (Patent Document 1).

  In addition, there is also known one that closes a gas cutoff valve when an earthquake is measured (Patent Document 2).

  Furthermore, the shaking caused by an earthquake is divided into a P wave called initial tremor and an S wave called main movement. The P wave and S wave are generated simultaneously from the epicenter of the earthquake, and the P wave travels faster in the ground, so the P wave reaches the ground surface first, and the S wave arrives later. A system that operates between the detection of a P wave and the arrival of an S wave using this property of an earthquake is being developed, and a device that uses the information has been devised (Patent Document 3).

JP-A-10-188174 JP 2002-230665 A JP 2005-301542 A

  However, in these conventional disaster prevention systems, in order to detect a large shake at the equipment installation location, or to use information at a remote location, earthquake occurrence information is transmitted after measuring a large shake due to an earthquake, For example, if there is a large shaking that would cause the house to collapse, the gas supply valve will be shut off before the control is performed. The alarm action is not always performed. Moreover, there are cases where the earthquake detection system cannot receive power supply depending on the conditions of the equipment installation location, such as a gas supply valve.

  The present invention has been made in view of the above-mentioned problems. In particular, in equipment installation places where power supply cannot be received, the initial tremor of the seismic wave is measured, and it is determined that the seismic motion is before the arrival of the S wave, which is the main motion. An object of the present invention is to provide an earthquake detection system that outputs a control signal corresponding to each processing means and alarm means.

  In order to solve the above-mentioned problems, the first embodiment of the earthquake detection system according to the present invention measures the shaking of the earthquake at the place where the equipment is installed, and outputs the measured value and the shaking measuring means output from the shaking measuring means. A signal processing means for receiving a signal and performing processing according to the signal, driving the vibration measuring means and the signal processing means with a battery, and determining a seismic wave before arrival of an S wave at a device installation location; Is output.

  Furthermore, the signal processing means analyzes the seismic waveform when the signal intensity output from the shake measuring means is equal to or greater than a predetermined value.

  Furthermore, the second form of the earthquake detection system according to the present invention analyzes the output of the shaking measuring means, receives a control signal from the signal processing means that is output when it is determined as an earthquake wave, and receives a sound or warning sound. Is provided with an alarm generating means for issuing a warning as follows.

  Furthermore, the third form of the earthquake detection system according to the present invention analyzes the output of the shaking measuring means, receives a control signal from the signal processing means to be output when it is determined as an earthquake wave, and displays or lights the display. A display means that lights or blinks is provided, and an alarm is notified.

  Furthermore, the fourth form of the earthquake detection system according to the present invention analyzes the output of the shaking measurement means, receives a control signal output from the signal processing means that is output when it is determined as an earthquake wave, It is characterized by comprising sensitivity switching means for switching the sensitivity of the sensor such as smoke, flame, heat, electric leakage or gas leakage to high sensitivity.

  Furthermore, a fifth embodiment of the earthquake detection system according to the present invention uses the control signal from the signal processing means that outputs when analyzing the output of the shaking measurement means and determines that it is an earthquake wave, for example, a gas supply valve It is characterized by controlling the opening and closing of.

  Furthermore, the sixth embodiment of the earthquake detection system according to the present invention analyzes the output of the shaking measuring means, receives a control signal from the signal processing means that is output when it is determined as an earthquake wave, and transmits an alarm. An alarm transmission means is provided, and an alarm is transmitted.

  According to the present invention, there is an effect that corresponding operations can be performed before an S wave arrives at an equipment installation place when an earthquake occurs.

It is a figure which shows the 1st form of the earthquake detection system of this invention. It is a figure which shows actual seismic waveform recording. It is a flowchart figure of the earthquake detection system shown in FIG. It is a figure which shows the earthquake detection system of this invention using a 2nd shaking measurement means. It is a flowchart figure of the earthquake detection system which uses the 2nd shaking measurement means. It is a figure which shows the 2nd form of the earthquake detection system of this invention. It is a figure which shows the 3rd form of the earthquake detection system of this invention. It is a figure which shows the 4th form of the earthquake detection system of this invention. It is a figure which shows the 5th form of the earthquake detection system of this invention. It is a figure which shows the 6th form of the earthquake detection system of this invention.

  An outline of a typical embodiment of the present invention is as follows.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an earthquake detection system diagram of the first embodiment of the present invention. As shown in FIG. 1, the earthquake detection system in the present embodiment receives the signal 100 output from the shake measurement means 1 and the shake measurement means 1 and the signal processing means 2 that performs appropriate control before reaching the S wave and the shake measurement. The power supply 3 supplies power to the means 1 and the signal processing means 2. The power source 3 is composed of a primary battery, a secondary battery, a capacitor, a fuel cell, a solar battery, a microwave power receiving device that receives microwave power to obtain power, or a semiconductor element that produces the Seebeck effect. This is a power supply source that is configured by a thermoelectric generator or the like that generates electric power when it occurs, and that does not receive power supply from outside by wire.

  In general, the P wave, which is the initial tremor of an earthquake, has a speed of 6 to 13 km / sec, whereas the S wave, which is the major degree of earthquake, has a speed of 3.5 to 7.5 km / sec. If a P wave can be measured near the epicenter, a time of about 10 seconds from the P wave being observed to the arrival of the S wave at a point 80 km away from the epicenter can be secured.

  In the earthquake detection system of the present invention, the signal 100 output from the shake measuring means 1 is received at the installation location of the equipment incorporating the shake measuring means 1 and the signal processing means 2, and the signal processing means 2 receives the signal intensity of the signal 100. 2 is equal to or greater than a predetermined value, the seismic waveform is analyzed, and a P wave that is an initial fine motion is detected from the actual seismic waveform shown in FIG. The magnitude of the wave is predicted, and a signal 101 is output before the S wave that is the main motion arrives. Note that the vibration measuring means 1 only needs to be able to measure the magnitude of the vibration. For example, a mechanical seismic sensor, an acceleration sensor, a strain sensor, or the like can be considered.

  Next, operation | movement of the earthquake detection system of this invention is demonstrated based on the flowchart of the 1st form of FIG. The magnitude of shaking is measured in the shaking measuring means 1 (S1). In response to the signal from the shake measuring means 1, the signal processing means 2 determines whether or not it is greater than a predetermined magnitude (S2). If the signal intensity is equal to or greater than a predetermined value, the signal processing means 2 analyzes the signal 100 output from the shake measuring means 1 (S3). As a result of the analysis, the signal processing means 2 determines whether it is a seismic wave (S4). If it is determined as an earthquake wave, a control signal is output from the signal processing means 2 (S5). In this way, by performing signal analysis in the signal processing means 2 only when the signal intensity is equal to or greater than a predetermined value, current consumption can be reduced by reducing the signal processing time. As a result, the battery can be driven.

  In addition, when the magnitude of the shake is measured (S1), it is judged whether it is equal to or larger than the predetermined magnitude (S2) by the same means, for example, a mechanical seismic sensor, and the magnitude of the shake is measured. However, for convenience of explanation, if the magnitude of the shaking is measured (S1), it is determined whether it is equal to or larger than the predetermined magnitude (S2) by another means. It was decided.

  Next, as a variation of the present invention, an earthquake detection system in which the above-described earthquake detection system is further reduced in power will be described with reference to FIG. The earthquake detection system of FIG. 4 is added to the shake measuring means 1, the signal processing means 2, and the power source 3 that drives the shake measuring means 1 and the signal processing means 2 described in the earthquake detection system of the first embodiment of the present invention. The vibration measuring means 1 comprises power saving second vibration measuring means 1a.

  The second shaking measuring means 1a is connected to the shaking measuring means 1 and outputs an activation output 100a so as to activate the shaking measuring means 1 when an earthquake or any other shaking is detected. Note that the second shaking measuring means is also driven by the power source 3.

  In this earthquake detection system, an earthquake or any other shake is first detected by the second shake measuring means 1a at the installation location of the equipment incorporating the second shake measuring means 1a, the shake measuring means 1 and the signal processing means 2. Then, an activation signal 100a is output to the shake measuring means 1. The shake measuring means 1 detects the activation signal 100a, starts measuring the shake, and outputs the signal 100. Furthermore, in the signal processing means 2, when the signal intensity of the signal 100 is equal to or greater than a predetermined value, the seismic waveform is analyzed, and the P wave that is the initial tremor is detected from the actual seismic waveform shown in FIG. Then, the magnitude of the S wave that is the main motion is predicted from the magnitude of the P wave, and the signal 101 is output before the S wave that is the main motion arrives. It should be noted that the second shake measuring means 1a is not limited as long as the magnitude of the shake can be measured, similar to the shake measuring means 1 described above. For example, a mechanical seismic sensor, an acceleration sensor, a strain sensor, etc. Can be considered.

  Next, the operation of this earthquake detection system will be described based on the flowchart of FIG.

  First, the second shaking measuring means detects the presence or absence of an earthquake or any shaking, and outputs a start signal 100a (S11). When the shaking measuring means 1 detects the activation signal 100a, the shaking measuring means 1 starts measuring earthquake shaking (S12). Next, the signal processing means 2 receives the signal from the shake measuring means 1 and determines whether or not the signal processing means 2 is greater than a predetermined magnitude (S13). If the signal intensity is equal to or greater than a predetermined value, the signal processing means 2 analyzes the signal 100 output from the shake measuring means 1 (S14). As a result of the analysis, the signal processing means 2 determines whether it is a seismic wave (S15). If it is determined as an earthquake wave, a control signal is output from the signal processing means 2 (S16).

  In this way, the earthquake detection system is configured to detect the earthquake or any other shake by the power-saving second shake measuring means 1a and activate the shake measuring means 1, thereby driving the shake measuring means 1. Time can be minimized. Furthermore, the drive time of the signal processing means can be reduced, the total current consumption of the earthquake detection system can be reduced, and a battery-driven earthquake detection system can be realized.

  FIG. 6 is an earthquake detection system diagram of the second embodiment of the present invention. As shown in FIG. 6, the earthquake detection system in the present embodiment includes a signal processing unit 2 that receives the signal 100 output from the vibration measurement unit 1 and the vibration measurement unit 1 and performs appropriate signal processing before reaching the S wave. It comprises a power supply 3 for supplying power to the measuring means 1 and the signal processing means 2 and an alarm generating means 4 for receiving a control signal 102 output from the signal processing means 2 and issuing an alarm. The alarm generating means 4 emits a sound or a warning sound and issues an alarm before an S wave, which is a main motion of a predetermined magnitude or larger, arrives. The power source supplied to the alarm generating means 4 may be the power source 3.

  FIG. 7 is an earthquake detection system diagram according to the third embodiment of the present invention. As shown in FIG. 7, the earthquake detection system in this embodiment receives the signal 100 output from the shake measuring means 1 and the shake measuring means 1 and the signal processing means 2 that performs appropriate signal processing before reaching the S wave and the shake. The power supply 3 supplies power to the measurement means 1 and the signal processing means 2 and the display means 5 receives the control signal 103 output from the signal processing means 2 and turns on or blinks the display or light. In the display means 5, a warning is urged before the S wave having a degree of importance of a predetermined scale or more arrives by turning on the display or the light. Note that the power supplied to the display means 5 may be the power supply 3.

  FIG. 8 is an earthquake detection system diagram according to the fourth embodiment of the present invention. As shown in FIG. 8, the earthquake detection system according to the present embodiment receives the signal 100 outputted from the shake measuring means 1 and the shake measuring means 1 and the signal processing means 2 that performs appropriate signal processing before reaching the S wave and the shake. Sensitivity switching that outputs a sensitivity control signal 105 that controls the sensitivity of the sensor 7 with high sensitivity in response to the power supply 3 that supplies power to the measuring means 1 and the signal processing means 2 and the control signal 104 that is output from the signal processing means 2. Consists of means 6. When the sensor 7 detects a fire, the fire occurrence is judged even at a lower temperature measurement. When the sensor 7 detects a gas leak, a lower gas concentration is detected. The measurement of gas leakage should also be made in the measurement. For example, when the sensor 7 detects a fire, when a 65 ° C. signal is output from the heat sensor during normal operation, it is determined that a fire has occurred at 50 ° C. Change as follows. That is, the arrival of the S wave is predicted when the P wave is recognized. If this S wave is large, the probability of fire occurrence increases, so the detection power of fire occurrence can be increased by lowering the threshold value of the heat detector.

  In the event of an earthquake, there is a high possibility of fire and gas leaks. Therefore, by increasing the sensitivity of the sensor 7 in advance before the arrival of the S wave, the actual fire or gas after the arrival of the S wave. Even if a leak occurs, it can be detected early and a quick response can be taken. The sensor 7 may be any sensor that can change detection sensitivity such as fire, smoke, flame, heat, electric leakage, and gas.

  FIG. 9 is an earthquake detection system diagram according to the fifth embodiment of the present invention. As shown in FIG. 9, the earthquake detection system according to the present embodiment receives the signal 100 output from the shake measuring means 1 and the shake measuring means 1 and the signal processing means 2 that performs appropriate signal processing before reaching the S wave and the shake. The power supply 3 supplies power to the measuring means 1 and the signal processing means 2 and the control signal 106 output from the signal processing means 2 is received and the gas on-off valve 8 is opened and closed. The gas on-off valve 8 prevents gas leakage by closing the gas valve before an S wave having a major degree of a predetermined scale or more arrives. The gas on-off valve 8 may be a liquid valve that controls the flow of liquid, an electric breaker that controls electric conduction, or the like.

  FIG. 10 is an earthquake detection system diagram according to the sixth embodiment of the present invention. As shown in FIG. 10, the earthquake detection system according to the present embodiment includes a signal processing unit 2 that receives the signal 100 output from the vibration measurement unit 1 and the vibration measurement unit 1 and performs appropriate signal processing before reaching the S wave. The power supply 3 supplies power to the measuring means 1 and the signal processing means 2 and the alarm transmission means 9 receives the control signal 107 output from the signal processing means 2 and transmits an alarm. The alarm transmission means 9 issues an alarm to a device that does not have an earthquake detection system before the arrival of an S wave having a major degree of a predetermined scale or more.

  For example, if the earthquake detection system is installed on the first floor, no alarm is heard on the second floor. By installing a receiver on the second floor that can receive a warning from the alarm transmission means 9 installed on the first floor, it is possible to issue an alarm even on the second floor where no earthquake detection system is installed.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be applied in various ways within the scope of its technical idea. For example, by applying to an apparatus affected by an earthquake, it is possible to take an appropriate action before an S wave having a degree of importance of a predetermined scale or more arrives.

DESCRIPTION OF SYMBOLS 1 Shaking measuring means 1a 2nd shaking measuring means 2 Signal processing means 3 Power supply 4 Alarm generating means 5 Display means 6 Sensitivity switching means 7 Sensor 8 Gas on-off valve 9 Alarm transmitting means

Claims (8)

  A shake measuring means for measuring an earthquake shake and a signal processing means for receiving a signal output from the shake measuring means, performing a process according to the signal, and outputting a control signal, the shake measuring means and the signal processing means Is an earthquake detection system that is driven by a battery.   A shake measuring means for measuring an earthquake shake and a signal processing means for receiving a signal output from the shake measuring means and performing processing according to the signal, the signal processing means is a signal output from the shake measuring means. An earthquake detection system characterized by analyzing a signal output from the shake measuring means only when the signal intensity of the signal exceeds a predetermined value, judging whether it is an earthquake wave, and outputting a control signal.   Compared with the shake measurement means, the second shake measurement means includes power saving second shake measurement means. When the second shake measurement means detects a shake, the shake measurement means is activated to start detection of an earthquake shake. The earthquake detection system according to claim 1 or 2, which outputs a start signal.   2. An alarm generating means for analyzing the output of the shaking measuring means and receiving a control signal from the signal processing means to be output when it is determined as an earthquake wave, and issuing a sound or a warning sound. The earthquake detection system of any one of -3.   The output of the said shake measurement means is analyzed, The control means from the said signal processing means output when it judges that it is a seismic wave is received, The display means which lights or blinks a display or a light is provided. 4. The earthquake detection system according to any one of 3 above.   The control signal from the signal processing means that is output when the output of the shaking measuring means is analyzed and determined as a seismic wave is input to the sensitivity switching means, and fire, smoke, flame or heat is output by the output signal of the sensitivity switching means. The earthquake detection system according to any one of claims 1 to 3, wherein the sensitivity of the sensor for leakage or gas leakage is switched to high sensitivity.   4. The output of the shake measuring means is analyzed, and a control signal from the signal processing means that is output when it is determined as an earthquake wave is received to control the opening and closing of the gas supply valve. The earthquake detection system according to item 1.   An alarm transmitting means for receiving a control signal from the signal processing means according to any one of claims 1 to 3 and outputting an alarm when analyzing the output of the shake measuring means and determining that the output is a seismic wave. An earthquake detection system characterized by comprising.